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🎥 | "Mass production type Rico" starring Yuuki Yoda The charm of mass production type conveyed by Zaku


Photo Zaku's plastic model production Rico (Yuki Yoda) – (C) "Mass production type Rico" production committee

"Mass production type Rico" starring Yoda Yuki The charm of mass production type conveyed by Zaku

 
If you write the contents roughly
Rico got a so-called old kit that requires adhesive.
 

On the 30th, the TV Tokyo drama "Mass production type Rico-Plamo girls' life assembly ..." starring Yuuki Yoda of Nogizaka46. → Continue reading

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Wikipedia related words

If there is no explanation, there is no corresponding item on Wikipedia.

adhesive

adhesive(It ’s terrible,Adhesive,Glue) Connects things ()then) The substance used for.paint,laminate-CeilingMaterials and the like may also be included in a type of adhesive due to the function of adhering one side.

International Standards Organization(ISO) defines adhesion as "a state in which two surfaces are joined by chemical or physical force or both through an adhesive."[1]..Strictly speaking, adhesives and adhesives have different properties.[2](See below).in JapanHousehold goods quality labeling methodThere is a stipulation in the quality labeling regulations for general merchandise and industrial products.[3].

Overview

In general, there are many cases where the adhesive is considered to be made only of resin.However, of the substrate and the adhesiveCoefficient of thermal expansionWith a highly reliable adhesive, the durability will decrease if the adhesive is different.silicaIt is common for industrial use to mix solids such as.Another reason isThermal conductivity, Improvement of structural strength, reduction of heat generation during curing, price merit, etc.

For commercial productsputtyIt may be distinguished by a name such as.

The name of "adhesive" was in the Taisho era.CemedineIt is said that it was invented by Zenjiro Imamura, who was the president of.Imamura often traded at that time for what had been called "joining material" or "strong glue" until then.文 房 具Besides the storepharmacyTherefore, it is said that the word "agent" was used instead of "lumber" to make it easier to sell at pharmacies. (Pharmacies around the 1920s sold daily necessities and seasonings,Jack-of-all-tradesThe target side was strong. )

Adhesion in English, a phenomenon in which different substances stick together, is translated as adhesion, adhesion, density, adhesion, agglomeration, etc.[2]..However, strictly speaking, adhesive force and cohesive force, adhesive force and adhesive force are distinguished, and adhesive and adhesive are also distinguished.[2]..The major difference between adhesives and adhesives is that the adhesive itself is not dry while the adhesive is bonded.[2]..Secondly, bonding with adhesives is mainly due to cohesive force (attractive force of homologous molecules).[2].

The mechanism of the generation of adhesive force is not well understood, but the adsorption theory, the electrical theory, the diffusion theory, and the weak boundary layer theory have been advocated.[2].

Adhesive history

The history of adhesives began when humans began using tools.Stone ageToPicklesTo fix to tree branches or bambooasphaltWas used[1]. Also,lacquerApproximately 6000 years ago repaired usingEarthenwareHas also been found.

Rich in petroleum resourcesMiddle EastSo asphalt was used for mural painting and architecture[1]..ancientBabyloniaAsphalt was used to fix the statue's eyes.The Old TestamentToTower of Babel OfbrickAdhesion andNoah's ArkIt is written that asphalt was used for waterproofing.

Also, hunting is popularEgypt,Chugoku,EuropeBoiled beast skins and bonesGlueWas used[1]..In ancient EgyptCasket,Furniture-papyrusIt was widely used to bond such things. Around the 12th centuryEur-lex.europa.eu eur-lex.europa.euHigh-performance bow made of animalboneIt is made by stacking multiple thinly cut boards and adhering them with glue.

In Japan, where there are few carnivorous habits, lacquer (urushi sap) and rice are used as raw materials.StarchGlue was mainly used[1]..Has been used since ancient timesPlaster TheIshigakiOften used in brick construction and starch glueSleeping constructionUsed inFusuma,ShojiHas been used when making.

Mass production of adhesives in the 18th century NetherlandsIt was started by the glue manufacturing factory built in.After thatNatural rubber・ Starch ・caseinNatural adhesives such as these have begun to be manufactured in various countries.

In the 20th century, synthetic adhesives appeared one after another.1915For the first timeSynthetic resinOne ofPhenolic resinWas used as an adhesive when manufacturing laminated boards,Chemical industryAdhesives have also been developed with the development of.1940Before and afterEpoxy resinAdhesive金属It began to be used for joining.Since then, various types of adhesives have been used for various purposes.

Features of adhesive joining

Joining method"One of thethen"Has the following features.

Strong Points

  • It corresponds to various types of objects to be bonded (hereinafter referred to as "adhesive materials").It is also possible to join different types of adherends.
  • It does not depend on the shape of the adherend, such as size and thickness.
  • To join the faces togetherstressCan be dispersed.
  • Light and aesthetically pleasing.
  • Adhesives can be mass-produced and the joining process can be easily automated.
  • It is airtight and watertight, and various functions can be added by changing the composition of the adhesive.

etc.

Disadvantage

  • Typically,Heat-resistantAnd cold resistance is not very high.
  • Typically,FlammabilityThere are many things.
  • The adhesive must be selected according to the type of adherend.
  • If proper bonding conditions are not observed, the performance cannot be fully exhibited.
  • In general, it is difficult to separate the adherends once adhered to each other, which makes disassembly very difficult.
  • Since there are many cases where a substance different from the adherend is used,RecyclingMay be hindered.
  • Adhesives that use solvents (for plastics, rubbers, etc.) require ventilation during use, and if misused, they can lead to organic solvent poisoning.

etc.

Adhesion process

There are five bonding mechanisms, and three of them are mainly involved in adhesives (physical bonding, chemical bonding, and distributed bonding).In some cases, diffusion adhesion is also involved.

Adhesion consists of the adhesive first sufficiently wetting the surface of the adherend and then hardening.

Adhesion is except for someatom or 分子Diffuse each otherWeldingUnlike joininginterface (bond line) Exists.Therefore, the adhesive strength is greatly affected by the surface condition of the adherend, and it is desirable to perform surface treatment in advance.In particular,Washing,GrindRemove foreign matter with金属Then.anti-rust,Oil-OxideTo remove,Plastic,rubber OfMoldingThen residualRelease agentEtc. to remove.Also, for some adherends in advancePrimerOne of the surface treatments is the case of applying the above to improve the adhesive strength.

Adhesive is initially applied to wet the adherendliquidShape or close to流体It needs to be shaped.solidButheat,pressureIt suffices if it can be changed to a fluid state by an external action such as.thisLiquidityThe adhesive with the adhesive must basically be applied to the entire surface of the adherend to be joined.For applying adhesive, use equipment (brush, spatula, roller,CaulkingThere is a simple manual application method using a gun, etc., and an application method using dedicated equipment (air spray, nozzle spray, coater, bead, dispenser, potting machine, etc.) to support mass production. ..

Next, it cures and adheres by having the strength required for joining.The process ispolymerizationWith hardeners, etc.Chemical reaction,solventEvaporation, if it is a solid, it is done by release from external action or reaction.At this time, the surface to be joined of the adherend must be in proper and sufficient contact with the adhesive, and if the contact timing is missed, such as when the open time has passed, the original adhesive force will not be exhibited.again,HotmeltExcept for pressure-sensitive type, B-stage resin, etc., leave it to stand until the adhesive is sufficiently cured.HealthI need to let you.

Classification by adhesive properties

Adhesives can be divided into liquid coating type and solid pressure-sensitive / heat-sensitive type adhesives.[4].

Liquid adhesive

The liquid adhesive is called a coating type, and it is a type that can obtain adhesive strength through the processes of coating, crimping, and curing.[4].

latexshape·Emulsionform(Latex & Emulsion)
The initial state is a suspended aqueous solution obtained by polymerizing the solid content of a polymer in water.colloidLatex adhesives are used when natural or synthetic rubber is the main component, and emulsion adhesives are used when a polymer that is originally insoluble in water is emulsified with a protective colloid and can be dissolved in water. being classified.These may be mixed with different polymer components in order to impart properties, and have a high degree of freedom in designing physical properties.It has excellent storability, but when frozen, it decomposes and loses its original function.Although it adheres at room temperature, it does not solidify sufficiently in a low temperature environment and becomes whitened, so the minimum film formation temperature (Minimun Film Forming Temperature) Work on is required.
The bonding process is a dry solidification type, and the moisture of the adhesive evaporates to cure and bond.[4].
The volume change after bonding is larger than that of the reaction type.[4].
There are acrylic resin emulsion type and rubber latex type.[4].
Solvent type
The initial state isSynthetic resin,rubberSuch asHigh molecularSolid contentOrganic solventLiquid state dissolved in a solvent such as.
There are vinyl acetate resin solvent type, vinyl copolymer resin solvent type, and rubber solvent type.[4].
The volume change after bonding is larger than that of the reaction type.[4].
The bonding process is a dry solidification type, and the solvent of the adhesive volatilizes to cure and bond.[4].
Reaction system (Reactive adhesives,monomer-OligomerSuch)
The initial state is a liquid or solid whose main component is the component before the chemical reaction occurs.By giving energy such as light and heatThermosettingTo start.There are cases where the energy is given explicitly and cases where it is not (normal temperature reaction). The former uses an oven or a curing furnace, and the latter cures naturally at room temperature.Even when the latter is used, it is generally possible to accelerate the curing reaction or change the physical properties after curing by giving excessive energy.
The chemical reaction is carried out under conditions such as high temperature and high pressure.Functional groupAlthough one chemical species with is sufficient (in the case of homopolymerization), it is generally difficult to use such an environment when an adhesive is used, so two or more chemical species are often used in combination.Therefore, as products, there are products that are mixed immediately before use (two-component type) and products that are already mixed at the time of shipment from the factory (one-component type).The former has good storage stability because it is divided into two liquids, but the latter uses various measures to achieve both storage stability and reactivity (curability).Examples include freezing storage, microencapsulation of curing agents / catalysts, and raising the curing temperature.For this reason, it is generally expensive, and most of them are used for industrial purposes, especially for electronic components, except for a few commercial products.
CyanoacrylateSystemInstant adhesive TheWedIt is a special type that uses a catalyst as a catalyst, and although it is a single liquid, it does not apply to the above.
The reactive adhesive is applied before and after curing.densityIt has the feature that it is unlikely to reduce the volume other than the change of and some volatilization.

Solid adhesive

Solid adhesives are called pressure-sensitive and heat-sensitive types.[4].

tape(Pressure sensitive adhesives)
Adhesive in the initial statecloth,paper・ Metal foil ・CellophaneSuch astapeApplicable or soaked in a foundation.

Types of adhesive components

Inorganic adhesive

silicaAdhesive
ceramic
cement
Solder
Water glass(Sodium silicate, sodium silicate)

Organic adhesive

Natural adhesive

asphalt
albumin
albuminIs an ingredient.It is used in the field of craft paper because it is insoluble in water.
lacquer
Casein adhesive
Casein adhesive (Casein adhesives) Is,milkOf originproteinIs a type ofcaseinAdhesive containing.Solution system (alkaliSolution system).
Obtained by coagulating and precipitating milk with acidRinThe protein caseinic acid has a moderate viscosity and is in a glass bottle.label,Art materialsIt is used for such purposes.It was once widely used for wood and paper processing, but those fields have almost switched to synthetic adhesives.
Natural rubber adhesive
Natural rubberAdhesive (Natural rubber adhesives, NR adhesive, rubber glue)latex[(-CH2-C (CH3) = CH-CH2-)n] Is the main component of the adhesive.Solution system / tape.
Hevea brasiliensisA liquid state in which raw rubber obtained by adding isobrene to natural latex collected from (Hebea) and coagulating it is melted in a solvent.Various stabilizers and vulcanizing agents are added to stabilize physical properties and add functions.
Natural rubber latex adhesive
Natural rubber latex adhesive (Natural rubber latex adhesives) Is an adhesive whose main component is natural latex.Water dispersion system.
Concentrate natural latex to about 60%,PreservativeAsammonia, Liquid with casein added for viscosity adjustment.Used for paper bonding.
Starch adhesive
Starch adhesive (Starch adhesives) Is derived from plantsStarchAdhesive whose main component is.Solution system (water system).
Starch is gelatinized, and after application, it hardens and adheres through the process of evaporation of water.It has a long history, such as shofu made from wheat flour and rice-derived cooked rice.Nara periodThere is a record that was used from.CurrentlycornMade fromCornstarchIs the mainstream.It is used in the field of paper bonding such as stationery because it is inexpensive and easy to use.Also, because of its high safetyFoodIt is also used as a mouth glue for containers.There was a tendency that it was replaced by the appearance of synthetic glues such as vinyl acetate resin, but in recent years, it has been reviewed from an ecology-oriented point of view and its use is increasing.
Natural starch is not suitable for coating machines.Powdered starch for mass consumptionThermal decompositionRoasted dextrin with stabilized viscosity, oxidized starch, and modified products such as acetylated, methylated, and carboxymethylated are used.
glue
glue(Glue,Animal glue, The one made from hoofHoof glue) Is of animal origingelatinAdhesive whose main component is.Solution system (water system).
Animal major proteins (collagen) Is partially hydrolyzed to obtain water solubilitypeptideAs a component, it cures and adheres through the process of cooling from a water-soluble state heated to about 60 ° C.It is used in the paper bonding field and woodworking field such as bookbinding and wallpaper because of its excellent initial adhesiveness.It is also used for stringed instruments that require repair and adjustment because it can be peeled off and removed cleanly just by heating it.
Powder glue, which is usually sold as powder, has disadvantages such as complicated procedure before use and inferior flexibility.In order to improve these drawbacks, various modifiers are added in advance.Gel stateCompound glue processed into is also on sale.
Fibrin glue
Fibrin glue (Fibrin adhesives) Is,bloodIs a type of protein contained inFibrinAdhesive using.Reaction system.
Of bloodcoagulationA type of bio-adhesive that uses a mechanism.Adhesion is performed using the recoagulation action of fibrin, which is decomposed by reacting fibrinogen with an enzyme.Highly safe but poorly adherent and made from bloodInfectionThere are many points to be overcome, such as concerns about the problem.
Matsuyani

Biology

Bacterial(English edition)Has a strong adhesive force that is more than twice that of synthetic adhesives[5].

Synthetic adhesive

Acrylic resin adhesive
Acrylic resin adhesive (Acrylic resin adhesives) Is,Acrylic acidA general term for adhesives whose main components are derivatives.Reaction system.
Acrylic monomerElastomer-Liquid with catalyst as the main component.In the curing / bonding processChemical reactionThose without is the first generation (FGA),Polymerization reactionSecond generation (SGA), urethane acrylate or epoxy acrylateUVThose that undergo radical polymerization and cure by energy irradiation such as are called third generation (TGA).
Currently, the SGA two-component type, which includes the main component liquid and the curing accelerator separately, is the mainstream.When mixed, it causes redox polymerization (a type of radical polymerization) and cures and adheres.The main liquid is applied to one side of the adherend, and the curing agent is applied to the other side, and pressure-bonded to bond them.It has excellent chemical resistance and physical properties, and can be adhered at room temperature even if there is some oil film on the surface of the adherend.It is used in many fields such as electrical and electronic equipment, vehicles, construction, and metals.It is also listed as one of the structural adhesives because of its excellent durability.
Acrylic resin anaerobic adhesive
Acrylic resin anaerobic adhesive (Acrylic resin anaerobic adhesives, Anaerobic Adhesives, Anaerobic Adhesives, Anaerobic Sealants) are adhesives containing diacrylates and peroxides as the main components.Reaction system.
Acrylate monomer as the main component, amines, peroxides,saccharinLiquid with added.Liquid when in contact with air, but shut off and metalionWhen it comes in contact with it, it causes a catalytic reaction and hardens and adheres.Because it has excellent properties for metal adhesionscrewIt is widely used in the mechanical and electrical and electronic fields such as automobiles, mainly in the mating field such as hole sealing and filling.
Acrylic resin emulsion adhesive
Acrylic resin emulsion (Acrylic formulations) Is an adhesive whose main component is an acrylic resin emulsion.Water dispersion system.
A milky white aqueous solution obtained by emulsifying and polymerizing an acrylic monomer.The adhesive part is very flexible,Weatherability・ Because it has excellent water resistance and alkali resistance,fiberUsed in fields such as processing and packaging.Vinyl acetateThe modified type copolymerized with resinVinyl chloride resinな どPlasticExcellent adhesion of kind.styreneCopolymerize with monomerpaintOften used for.
α-olefin adhesive
α-olefin adhesive (α-Olefin resin adhesives, Α-olefin maleic anhydride adhesive, Kratac), α-OlefinWith isobutylene, a type ofmaleic anhydrideAn adhesive whose main component is a copolymerized resin with.Solution system (water system)
In a copolymer resin aqueous solutionCalcium hydroxide-A curing agent is added to a liquid to which a filler such as latex or metal oxide is added to cure and bond it.Cross-linking by calcium hydroxide occurs with solvent evaporation, and the adhesive strength is improved.Heat resistance / resistanceCreepIt is used for plywood, woodwork products and construction because it has excellent properties and was developed as a formaldehyde-free wood adhesive.The room temperature curing type has a strong alkalinity of pH 12 or higher and may corrode wood.Conversely, the neutral type requires heating to cure.The α-olefin maleic anhydride resin can also be used to protect emulsions and latexes.
Urethane resin adhesive
Urethane resin adhesive (Polyurethane resin adhesives) Is,UrethaneA general term for adhesives with the base -NHCOO-.In a broad senseIsocyanateGroup (NCO group)Hydroxy groupContains an adhesive that is derived from (OH group) and compounded.Reaction system.
The raw material can be selected from many types, and various physical properties can be imparted by further adding additives.
The two-component type is a polyol and polyisocyanate having a hydroxyl group at the end, or urethane having an isocyanate group at the end.PrepolymerAnd polyol are combined and mixed to cause a chemical reaction to cure and adhere.It adheres at room temperature, but the adhesive strength can be increased by heating.Excellent weather resistance, oil resistance, cold resistance, metalceramic-Used for structural materials such as plastics and for adhering laminate films for food packaging.
In the one-component type, a mixture of urethane prepolymer and catalyst cures and adheres by humidification or heating.It is used for industrial and construction purposes, and is widely used in place of two-component epoxy resin adhesives, especially in the floor field.It is necessary to store it in a sealed container so as not to cause troubles such as hardening of the liquid surface.
Urethane resin solvent-based adhesive
Urethane resin solvent-based adhesive (Polyurethane solvent type adhesives) Is,PolyurethaneAn adhesive made by melting a resin or urethane prepolymer in a solvent.Solution system
Polyurethane resinMethyl ethyl ketone(MEK) ・Dioxane-A liquid adhesive dissolved in a solvent such as butyl acetate is mainly used for bonding a soft vinyl chloride resin.The prepolymer solution type has almost the same properties.
Urethane resin emulsion adhesive
Urethane resin emulsion adhesive (Urethane emulsions) Is an adhesive whose main component is urethane resin emulsion.Water dispersion system.
An aqueous solution in which urethane resin is emulsified by mechanical emulsification or by combining with vinyl.It has excellent plastic adhesion and is also used in the woodworking / building materials field and for laminating.However, it has not been generalized because it is expensive.EscapeVOCApplication from the preceding paint field is awaited for development in the field aimed at.
Ethereal cellulose
Ethereal cellulose (ether cellulose) Is,etherSystem derivativecelluloseAdhesive whose main component is.It is classified as a type of cellulosic adhesive.Methylcellulose (MC) and Carboxymethyl Cellulose (Methylcellulose, MC)Sodium Carboxymethylcellulose, CMC) is used as an adhesive.Solution system (water system).
The aqueous solution of methylcellulose is viscous in the initial state and forms an elastic film after curing.Used for wallpaper bonding and leather.
An aqueous solution of sodium carboxymethyl cellulose, which is a kind of thickener for foods, has viscosity and film thickening properties, and is used in the field of fiber and paper adhesion.
Ethylene-vinyl acetate resin emulsion adhesive
Ethylene-vinyl acetate resin emulsion adhesive (Ethylene-Vinylacetate copolymer emulsion adhesives, EVA resin emulsion adhesive) is an adhesive whose main component is an emulsion of a resin obtained by copolymerizing ethylene vinyl alcohol (EVA) and vinyl acetate.Water dispersion system.
10-30% on vinyl acetate monomerethyleneA cloudy aqueous solution in which monomers are mixed and emulsion-polymerized under high pressure to emulsify.It has better water resistance, weather resistance, and alkali resistance than emulsions of vinyl acetate resin alone, and has a high adhesion speed, so it can be used in fields such as bookbinding and bag making.mortarIt is also used to bond synthetic resins such as admixtures and laminates using plastic sheets.In many cases, an organic solvent was added to improve the adhesive strength and workability, but a solvent-free type has also been developed to deal with recent environmental problems.
Ethylene-vinyl acetate resin hot melt adhesive
Ethylene-vinyl acetate resin hot melt adhesive (Ethylene-Vinylacetate copolymer hot melt adhesives, EVA resin hot melt adhesive) is an adhesive whose main component is a resin obtained by copolymerizing ethylene vinyl alcohol (EVA) and vinyl acetate.solid.
Adhesives and adhesives for base resins that are relatively inexpensive and have excellent thermal stabilityワ ッ ク スIs widely used in the fields of wrapping paper, bookbinding, and assembled woodworking. The feature is that it is easy to change the specifications by changing the mixing ratio of EVA and vinyl acetate.
Epoxy resin adhesive
Epoxy resin adhesive (Epoxy resin adhesives) Is an adhesive whose main component is epoxy resin.Reaction system.
There are 1-component type and 2-component type for each curing method. Industrially, 1-component type and 2-component type for household use are the mainstream. In the two-component typeBisphenol AWhen a curing agent such as amine is added to the epoxy resin prepolymer obtained by the condensation reaction of epichlorohydrin and epichlorohydrin, graft polymerization occurs and the polymer is cured and adhered over time and thermosetting as a three-dimensional polymer.PrecureIt has high initial adhesiveness, and has excellent water resistance, moisture resistance, chemical resistance, electrical insulation, etc. as the characteristics of a three-dimensionally polymerized polymer, and it also has strength and heat resistance regardless of the type of adherend. Has excellent properties.Furthermore, various adhesive performances can be designed by selecting the type of epoxy resin and the type of curing agent.It is used in fields where high reliability is required, such as civil engineering and construction, electrical and electronic parts, semiconductors, and automobiles, including space and aircraft.
The bonding method depends on the selection of the curing agent, and polyamide and aromatics are required for normal temperature curing.Sulfonic acidIt must be a two-component adhesive that uses such as as a curing agent, but it is used as a universal adhesive for home use due to its wide versatility.The two-component type is also classified as a thermosetting type from the viewpoint of curing characteristics.When acid anhydride or aromatic amine is used, it becomes a thermosetting type and can be liquefied.
To improve peel resistance and impact resistanceNylon,IsocyanateBlended with polymers such as, are widely used as structural adhesives.
Epoxy-based conductive adhesive is a one-component epoxy resin adhesivePrecious metalManufactured by adding powder.The metal used isSilverThere is a lot of powder.In addition to being used in metal bonding applications as a substitute for solder, as a recent technology in assembling semiconductor integrated circuitsNCPand so on.
Epoxy resin emulsion adhesive
Epoxy resin emulsion adhesive (Epoxy emulsion adhesives) Is an adhesive whose main component is an epoxy resin emulsion.Water dispersion system.
An aqueous solution obtained by emulsifying an epoxy resin by a mechanical emulsification method.concreteAlthough it is used as a primer for use, there are still issues regarding price and performance, and development is still required.
Vinyl chloride resin solvent-based adhesive
Vinyl chloride resin solvent-based adhesive (Polyvinyl Chloride solvent type adhesives, PVC resin adhesive, PVC-doped cement) is an adhesive whose main component is polyvinyl chloride resin.Solution system.
A gel-like liquid in which a resin alone or a copolymer with vinyl acetate is melted in a solution.The type in which nitrile rubber is mixed with the solution is used for bonding vinyl chloride resin and for joining PVC pipes.In particular, vinyl chloride resin with a small particle size kneaded with a plasticizer is called PVC sol and is used for metal bonding.
Chloroprene rubber adhesive
Chloroprene rubber adhesive (Polychloroprene rubber adhesives, CR adhesive,Contact type adhesive) is chloroprene rubber [(-CH2-CCl = CH-CH2-)n] And an adhesive whose main component is phenol resin.Solution system.
A liquid with strong adhesive strength that is melted in a solvent by adding an alkylphenol resin or the like to improve workability while making the best use of the good adhesiveness of chloroprene rubber.It can be immediately bonded by applying it to the adherend at room temperature, drying it slightly, and stacking it (contact bonding).It is widely used for industrial purposes due to its ease of use and high performance, and is also familiar as a yellow-brown adhesive in a tube for home use.To further improve heat resistance and durability, a polyisocyanate compound is added and used.
As a product to which functionality is imparted, there is an adhesive for soft vinyl chloride resin graft-polymerized with methyl methacrylate.

Vinyl acetate resin emulsion adhesive
Vinyl acetate resin emulsion adhesive (Polyvinyl emulsion adhesives, Vinyl acetate emulsion adhesive) is an adhesive whose main component is vinyl acetate resin emulsion.Water dispersion system.
A milky white aqueous solution obtained by emulsifying and polymerizing vinyl acetate monomer as a protective colloid using poval or the like.Resin particles are fused by evaporation of water and hardened and adhered to a transparent film.A type that does not use the phthalate ester of the plasticizer has been developed for the purpose of responding to environmental problems.It is inexpensive and easy to apply, and can be used for various purposes by changing the composition of the polymer, but it is inferior in heat resistance, water resistance, and solvent resistance, so it was mixed with other resins for the purpose of improving these. There are also things.It is used for paper bonding, textiles, woodworking, plywood, etc., and is familiar with commercially available woodworking bonds.
Cyanoacrylate adhesive
Cyanoacrylate adhesive (α-Cyanoacrylate adhesives) Is an adhesive whose main component is 2-cyanoacrylic acid ester monomer.Reaction system.
It rapidly cures and adheres to a hard film due to the substrate and moisture in the air.Because it is a one-component, room temperature curing type with excellent workabilityInstant adhesiveUsed as.At the endAlkyl groupThe characteristics can be designed by selecting.Due to its low viscosity, it is easy to apply, and due to its high applicability to various adherends, the range of use that began with rubber, metals, plastics, medical applications, etc. continues to expand, and recently, tree grafting, etc. While it is also used for whitening, it is easy to adapt to the cortex and whitens.fingerprintIt is also used as a discriminating material.It has excellent peel strength, but is inferior in impact resistance and heat resistance, and has a short open time.In recent years, improved types have also been developed.
Silicone adhesive
Silicone adhesive (Silicone adhesives) Is an adhesive whose main component is organopolysiloxane.There are condensation curing type and addition curing type.Reaction system.
The condensation-curing type is a liquid or paste in which an organopolysiloxane having a hydroxyl group at the end and a cross-linking agent are mixed.After coating, it reacts with moisture in the air to start curing from the surface, and finally forms a cured layer with rubber elasticity.It is classified according to the type of free gas generated during the condensation reaction, and it is necessary to select the type according to the usage situation.Molds and main uses are de-oxime type (general purpose) and de-oxidationAcetic acidMold (glass adhesive), deacetone type (for electronics and electricity), amide type (architecture), etc.
The addition-curing type is a two-component type that is divided into an organopolysiloxane having a vinyl group at the end and a cross-linking agent.It cures and adheres by heating with a catalyst.The curing rate is faster than the condensation curing type, and no free gas is generated.
Aqueous Polymer-Isocyanate Adhesive
Aqueous Polymer-Isocyanate Adhesive (Water-based polymer-isocyanate adhesive,Emulsion polymer-isocyanate adhesives, Aqueous vinyl urethane wood adhesive (Aqueous Vinylpolymer Solution-Isocyanate adhesives for Wood, API), Aqueous Vinyl Urethane) is an adhesive whose main components are aqueous solutions or emulsion solutions of various hydrophilic polymers and isocyanate compounds as cross-linking agents.A solution system (water system) that has the properties of an aqueous dispersion system.
Calcium carbonateChloride in a polymer aqueous solution or emulsion solution to which a filler such asパ ラ フ ィ ンWhen polyfunctional isocyanate or its prepolymer dissolved in the above is added, it cures and adheres over time.At the beginning of development, it was called "water-based vinyl urethane".Those that undergo the curing process at room temperature are classified into one type, and those that require heating are classified into two types.As a water-based adhesive that has excellent water resistance and does not contain formaldehyde, it is mainly used for wood bonding, and is also expanding to compound bonding with plastics, metals, rubber, etc.
Styrene-butadiene rubber solution adhesive
Styrene-butadiene rubber solution adhesive (Styrene-butadiene rubber adhesives, SBR / SBS or SIS adhesives)styreneとbutadieneAn adhesive whose main component is a copolymer with.Polymerization reactionThere are two types depending on the difference.Solution system.
Random copolymer SBR has natural rubber-like properties, and solvent solutions are used as adhesives, but their adhesive strength is not strong.Block copolymer SBR has vulcanized rubber-like properties.For solvent solution, add an agent to rubber, glass, metal,StyrofoamUsed for kind adhesion.Styrene-butadiene block copolymers (SBS) and styrene-isoprene block copolymers (SIS) are also used as solute rubbers.
Styrene-butadiene rubber latex adhesive
Styrene-butadiene rubber latex adhesive (Styrene-butadiene rubber latex adhesives, SBR Latex or SB Latex) is an adhesive whose main component is a copolymer of latex-like styrene and butadiene.Water dispersion system.
Milky white liquid.Styrene ratio less than 50% (SBR latex) is mainly copolymerized with carboxylated SBR latex (c-SBR) and vinyl pyridine, and is used for bonding floor materials such as carpets.タ イ ヤUsed in the field of fiber cord adhesion.Those with a styrene ratio of 50% or more (SB latex) have a relatively light color and are used in the paper painting field.
Nitrile rubber adhesive
Nitrile rubber adhesive (Nitrile rubber adhesives, NBR adhesive) is an adhesive whose main component is nitrile rubber.Solution system.
A liquid obtained by melting nitrile rubber in a solvent.The type containing phenol resin has excellent oil resistance and solvent resistance, and is used for brake linings, metals, wood, etc.leatherIt is used for such things.The type containing polyvinyl chloride is used for film adhesion and the like.
Nitrocellulose adhesive
Nitrocellulose adhesive (Nitrocellulose adhesives) Is of celluloseesterIt is one of the system derivativesNitrocelluloseAdhesive containing (nitrocellulose) as the main component.It is classified as a type of cellulosic adhesive.Solution system.
A liquid form in which nitrocellulose is melted in a solvent.As a tube-shaped household adhesive because it dries and hardens quickly and is suitable for bonding leather, paper, wood, and seto items.1938It is sold from.Although it is inexpensive, it is easily discolored and flammable, so care must be taken when handling it.
Reactive hot melt adhesive
Reactive hot melt adhesive (R-HM adhesive, Jetweld) is an adhesive that uses urethane resin as the main component and imparts reaction system characteristics to hot melt.The initial state and usage follow solid.
The urethane prepolymer produced in the heated state solidifies while leaving isocyanate groups (NCO groups).When this is melt-coated in the same manner as a hot-melt adhesive, it reacts with moisture contained in the air or the adherend after cooling and curing to cause a chain extension reaction and a cross-linking reaction.Since it undergoes a chemical reaction, it has higher heat resistance than general hot melt adhesives, but it is necessary to avoid moisture absorption for storage and use.
Phenol resin adhesive
Phenol resin adhesive (Phenolic resin adhesives) Is an adhesive whose main component is a resole-type phenol resin.Solution system (water system, formaldehyde system).
Condensation reactionWater with phenol and formaldehydealcoholsolution. Heat to 130 ° C or higher to cure and adhere.The alcohol-soluble type can be adhered at room temperature, but it is inferior in workability because a curing agent needs to be added separately.It has excellent water resistance, heat resistance, and weather resistance, but its impact strength is weak.In addition, the heating temperature is high and the adhesive turns reddish brown after curing, which limits the range of use.However, it has high adhesive strength to various adherends such as wood, metal, and glass.ShipIt is used for applications such as concrete panels.
Modified silicone adhesive
Modified silicone adhesive (Modified silicone adhesives) Is mainly composed of polypropylene oxide (modified silicone) having a methyldimethoxysilyl group at the end.1988Adhesive developed in.Reaction system.
A liquid made by adding additives to a modified silicone polymer.The alkoxysilyl group is hydrolyzed by the moisture in the air, and further cures and adheres relatively quickly while causing a condensation reaction.Since it has high strength and does not lose rubber elasticity, it is possible to eliminate the distortion that occurs during curing.It is shock-resistant and is becoming popular as an adhesive that is convenient for use in the construction field and everyday homes.
The one-component type is divided into modified silicone type, epoxy / modified silicone type, and acrylic / modified silicone type.Each has different characteristics such as shear strength and peel strength, and can be selected according to the application.
In the two-component type, the epoxy resin and the organic tin catalyst are used as agent A, and the synthetic silicone resin and the curing agent for epoxy resin are used as agent B.The hardness can be adjusted by changing the mixing ratio.
Polyamide resin hot melt adhesive
Polyamide resin hot melt adhesive (Polyamide hot melt adhesives, PA hot melt, nylon hot melt)polyamide(Nylon) Adhesive whose main component is resin.solid.
Polyamide resin with a relatively low melting point, such as 11 nylon or 12 nylon, processed into powder or film is used as a hot melt adhesive.The type in which diamine and diamine, which have low crystallinity, are copolymerized is mainly used in the fields of electricity, automobiles, and woodwork, and the linear polyamide type is used in the fields of fiber and metal bonding.
Polyimide adhesive
Polyimide adhesive (Polyimide glues, PI-based adhesive) is an adhesive whose main component is a small molecule polymer of polyimide (PI) belonging to the aromatic heterocyclic polymer.It is classified as a type of polyaromatic adhesive.Reaction system.
The property of impregnating a glass cloth with a liquid obtained by melting polyamide carboxylic acid in dimethyl acetaldehyde. While removing the solvent by heating to 400 ° C or higher, a dehydration ring closure reaction is caused in the process to imidize and cure / adhere.It has heat resistance of 350 ° C or higher, which is the highest level for adhesives, and also has excellent oxidation resistance.Demand is increasing in the aerospace and electrical industries.
Polyurethane resin hot melt adhesive
Polyurethane resin hot melt adhesive (Polyurethane hot melt adhesives, TPU hot melt, urethane hot melt) is an adhesive whose main component is thermoplastic polyurethane resin.solid.
Polyurethane resin with a low melting point processed into powder or film is mainly used in the textile field as a hot melt adhesive.
Polyolefin resin hot melt adhesive
Polyolefin resin hot melt adhesive (Polyolefin hot melt adhesives, TPO hot melt, olefin hot melt) is amorphouspolypropyleneAn adhesive whose main component is resin (APP).solid.
A hot-melt adhesive that takes advantage of APP's good adhesion to non-polar surfaces.Copolymerize with ethylene, propylene, butene, etc. to stabilize the physical properties.Used for roof waterproofing, carpet packing, plastic bonding, etc.
Polyvinyl acetate resin solution adhesive
Polyvinyl acetate resin solution adhesive (Polyvinyl acetate solvent type adhesives, PVAc adhesive, vinegar bipaste) is an adhesive whose main component is vinyl acetate resin.Solution system.
A viscous liquid in which a vinyl acetate polymer is dissolved in alcohol.Some are filled with other resins for modification.Excellent durability but water resistanceCreepInferior in resistance.In addition to wood, it does not contain any dissolving components, so it is suitable for bonding Styrofoam and is also used for building material boards.
Polystyrene resin solvent-based adhesive
Polystyrene resin solvent-based adhesive (Polystyrene solvent type adhesives, PS resin adhesive, PS-doped cement) is an adhesive whose main component is polystyrene resin.Solution system.
A gel-like liquid in which resin is melted in a solvent such as acetone.mainlyPlastic modelUsed as glue.Of those used for this purpose, those having almost no or no content of polystyrene resin, which is a solute, are used as a pouring (use) adhesive.
Long time agoCyclohexaneOnly the system existed, but now it is used for both purposes.LimoneneA system has been developed and marketed to improve safety.
Polyvinyl alcohol adhesive
Polyvinyl alcohol adhesive (Polyvinyl alcohol adhesives, PVAL, PVA adhesive, Poval)Polyvinyl alcoholAdhesive whose main component is.Water dispersion system.
PVA, which is used as an additive for emulsion adhesives as an emulsifier, has adhesive strength by itself.When water evaporates, it forms a transparent film that hardens and adheres.Familiar with office liquid glue for woodworking and paper bonding.It is also known as the so-called starch.
Polyvinylpyrrolidone resin adhesive
Polyvinylpyrrolidone resin adhesive (Polyvinyilyrrolidone adhesives, PVP adhesive, glue stick)Polyvinylpyrrolidone(PVP) An adhesive whose main component is resin.A solution system (water system) that is close to solid.
Add fatty acid sodium to water-soluble PVP to make it almost solid,GlycolThe one to which the slipperiness is given by adding the kind is usually low in viscosity, but when a force is applied at the time of application, the viscosity is generated.Taking advantage of this property, glue sticks formed in the shape of sticks are easy to use and are widely used for stationery and office work.
Polyvinyl butyral resin adhesive
Polyvinyl butyral resin adhesive (Polyvinyil butyral adhesives, PVB adhesive) is an adhesive whose main component is polyvinyl butyral resin, which is a type of polyvinyl alcohol.Reaction system.
Of polyvinyl alcoholmethanolAs a suspending agent in the solutionSulfuric acidIt is cured and adhered to the liquid to which the above is added by stirring while mixing butyraldehyde while heating.It has excellent transparency, light resistance, impact resistance, and vibration resistance, and is used for automobile safety glass.
Polybenz Imidasole Adhesive
Polybenz Imidasole Adhesive (Polybenzimidazole adhesives, PBI-based adhesive) is an adhesive whose main component is polybenzimidasole (PBI), which belongs to aromatic heterocyclic polymers.It is classified as a type of polyaromatic adhesive.Reaction system.
The property of impregnating a glass cloth with a small molecule polymer of PBI. Heat to about 350 ° C to cure and bond.It has a heat resistance of 350 ° C or higher, which is the highest level for adhesives, and demand is increasing in the aerospace and electrical industries.
Polymethacrylate resin solution adhesive
Polymethacrylate resin solution adhesive (Polymethylmethacrylate solvent type adhesives, PMMA resin adhesive, PMMA dope cement) is an adhesive whose main component is polymethacrylate resin.Solution system.
A gel-like liquid in which a resin is melted in a solution.Most of the solutions are solvents such as acetone, but there are also types that use MMA monomer or chlorosulfonated polyethylene.
Melamine resin adhesive
Melamine resin adhesive (Melamine resin adhesives) Is an adhesive whose main component is melamine (cyanuric acid amide).Solution system (water system, formaldehyde system).
Condensation-reacted melamine and formaldehydecatalystA syrup-like aqueous solution containing.Since precipitation and crystallization are likely to occur by itself, the mainstream is an improved product that is co-condensed with urea resin (MUF), co-condensed with phenol resin (MPF), and further co-condensed with melamine / phenol / urea (MPUF). .. Heat to about 50-60 ° C to cure and bond.Due to its excellent durability and heat resistance, it is used as an adhesive for wood such as outdoor plywood.
Urea resin adhesive
Urea resin adhesive (Urea resin adhesives, Urea resin adhesive, UF adhesive)UreaAdhesive whose main component is.Solution system (water system, formaldehyde system).
Condensation reactionA small amount in a syrup-like aqueous solution of urea and formaldehydeAmmonium chlorideIs added as a curing agent to cure and adhere.It is classified into a concentrated type and an unconcentrated type according to the solid content concentration.The concentrated type with a solid content of about 60% can be cured at room temperature, but the unconcentrated type with a solid content of 40-50% needs to be heated to solidify.Although it is slightly inferior in durability, it has water resistance, is inexpensive, and has good workability, so it is used as an adhesive for wood such as plywood.
Resorcinol adhesive
Resorcinol adhesive (Resorcinol resin adhesives, Resorcin-based adhesive) is an adhesive whose main component is resorcinol resin or phenol / resorcinol resin.Solution system (water system, formaldehyde system).
Resorcinol and formaldehydeacid or alkaliParaformaldehyde powder is added as a curing agent to an aqueous solution dissolved in water or alcohol by a condensation reaction using the above as a catalyst to cure and adhere.Adhesion at room temperature is possible, but it adheres better when heated to about 40 ° C.Although it is relatively expensive and the adhesive surface turns blackish brown, it has excellent durability and is used for adhering wood to plywood, woodwork products, and so on.Musical instrument-Used for structural materials such as wooden ships.
RFL (RFL) in which resorcinol and formaldehyde are condensed under alkaline conditions, and formalin latex is added to the reaction.Resorcinol Formaldehyde Latex) Water or solvent solution is used for bonding tire fiber cords.
Light / UV curable resin adhesive
Light-curing resin,UV curable resinAfter temporary fixing, it is exposed to light that causes a curing reaction and is cured and bonded.Naturally, it is not suitable for spaces between surfaces sandwiched between wide light-shielding objects.


Related laws

Regulation of contained substances

Act on Examination of Chemical Substances and Regulation of ManufacturingArticle XNUMX, Paragraph XNUMX, Class XNUMX Specified Chemical Substances

Law Concerning Regulation of Household Products Containing Hazardous Substances

There are strict restrictions on the substances contained in household products, which are unspecified and highly likely to come into direct contact with people at all times, compared to industrial applications.The table below2003While listing the 20 substances covered in the latest revision of, the substances that may be particularly applicable to adhesives are listed.Bold faceIt is written in.
Name of substanceStandardInspection method
Formaldehyde16ppm or less for infants or absorbance difference 0.05 or less, 75ppm or less for general useAcetylacetone method
Dieldrin30ppm or lessGas chromatograph with electron capture detector
4,6-Dichlor-7- (2,4,5 trichlorophenoxy) -2-trifluolmethylbenzimidazole30ppm or lessGas chromatograph with electron capture detector
Organic mercury compoundNot detectedAtomic absorption method
Triphenyltin compoundsNot detectedFrameless atomic absorption spectroscopy and thin layer chromatography
Tributyltin compoundsNot detectedFrameless atomic absorption spectroscopy and thin layer chromatography
Tris (1-aziridinyl) hosphin oxideNot detectedFrameless atomic absorption spectroscopy and thin layer chromatography
Tris (2,3-dibrompropyl) phosphiteNot detectedFrameless atomic absorption spectroscopy and thin layer chromatography
Bis (2,3-dibrompropyl) phosphite compoundNot detectedGas chromatograph with flame luminous intensity type detector
Vinyl chlorideNot detectedInfrared spectroscopy
methanol5w / w% or lessGas chromatograph with hydrogen flame type detector
Tetrachlorethylene0.1% or lessGas chromatograph with electron capture detector
Trichlorethylene0.1% or lessGas chromatograph with electron capture detector
Hydrogen chlorideThe amount of acid is 10% or less and the container has strength
Sulfuric acidThe amount of acid is 10% or less and the container has strength
Sodium hydroxideThe amount of alkali is 5% or less and the container has strength
Potassium hydroxideThe amount of alkali is 5% or less and the container has strength
Dibenzo-a, h-anthracenePreservatives / insect repellents 10ppm or less, preservative or insect repellent treated wood 3ppm or lessMass spectrometric gas chromatograph
Benzo-a-anthracenePreservatives / insect repellents 10ppm or less, preservative or insect repellent treated wood 3ppm or lessMass spectrometric gas chromatograph
Benzo-a-pyrenePreservatives / insect repellents 10ppm or less, preservative or insect repellent treated wood 3ppm or lessMass spectrometric gas chromatograph
Building Standards LawArticle XNUMX-XNUMX
2003The text added to is so-calledSick house syndromeIt was established to regulate the causative substances of.The main points are the prohibition of the use of chlorpyrifos and the restriction of the area of ​​building materials that emit formaldehyde (table below).These are also closely related to the components of the adhesive, which is one of the raw materials.
Usage restrictionsGrade symbolGrade nameReference value of divergence speed
NoneF ☆☆☆☆New higher standard--0.005mg / m2h
LimitedF ☆☆☆Type 3 formaldehyde-emitting building materials0.02mg / m2h --0.005mg / m2h
LimitedF ☆☆Type 2 formaldehyde-emitting building materials0.12mg / m2h --0.02mg / m2h
Do not useF ☆Type 1 formaldehyde-emitting building materials0.12mg / m2h-
RoHS Directive

Obligation to label contained substances

Handling, packing, transportation, etc.

Adhesive joining procedure

Adhesive surface treatment

Generally, it is better to have a smooth adhesive surface for adhesion.[6]..It is necessary to remove oil, moisture, dust, etc. on the adhesive surface.[6]..Dry wood and concrete well[6].

Apply

Generally, apply with a spatula, trowel, roller, etc. to one side of the adherend.[6]..In the case of instant adhesive, drop it on one side of the adherend[6].

  • Open time-Open time (Open time) Is the maximum allowable time that the adhesive can be applied to the adherend and then left unbonded.The adhesive that has been applied for more than this time cannot exert sufficient adhesive strength.

In the case of a two-component mixed reaction curing adhesive such as a two-component mixed epoxy adhesive or a second-generation acrylic adhesive metal lock, it is necessary to mix well with a predetermined mixing ratio of the main agent and the curing agent.[6].

  • Pottable time (working life, Pot life- pot life) --The maximum allowable time that can be used from a mixed state for application, mainly in two-component adhesives.Adhesives that exceed this time cannot exert sufficient adhesive strength.

Cure

  • Curing (Cure) --In JIS K6800, curing means that the components of the adhesive change to solid by physical action or chemical reaction.On the other hand,; solidification; (Hardening, Solidification) Refers only to changes due to physical action.
  • Reactivated adhesion (Reactivation) --A method of applying an adhesive to the surface of the adherend and then re-wetting or heating to regain the adhesive performance.Stamps coated with solution adhesive, envelope glue mouths, patches coated with solid adhesive, etc.
  • Initial Adhesiveness (Tack- Thanks) --The property of forming a bond immediately after contact with the adherend and exerting adhesive strength.Apart from the original adhesive force generated after curing, an additive is added to add a function in order to improve convenience.

Adhesive peeling / removal

A special remover (remover) may be used to remove the adhesive that has adhered to a part other than the adhesive surface.However, it may not be possible to remove it depending on the material of the adhesive surface.High for peeling the adhesive surfacePenetrationSexualorganicsolventIs used.pressure,temperatureIs left in an appropriate environment for a long time to break the chemical bond of the resin of the adhesive or to break the physical crosslink and peel it off.

Evaluation of adhesive properties

Even with the same type of adhesive, there are product numbers with various improvements corresponding to the application, and it is necessary to select according to the usage.The property evaluation is an evaluation item of physical properties that serves as an index for selection.

Contact angle
Wetting property with the adherend.Basically, it is essential that the adhesive has the property of sufficiently wetting the adherend, which depends on the compatibility with the adherend.The contact angle is an index of the performance, and it is measured by a device called a contact angle meter in addition to visual inspection.An adhesive (in a liquefied state) is dropped onto the adherend, and the differentiated inclination of the curve of the adhesive interface and the angle with the adherend are obtained.It is determined that the smaller this angle is, the better the wetness is.
Viscosity(Liquidity,Rheology)
The viscosity should be selected to match the method of applying the adhesive.When it is applied to a wall surface, the adhesive cannot be maintained unless it has a certain viscosity.On the contrary, when applying mechanically such as a nozzle, a high-viscosity adhesive is unsuitable.
A rotational viscometer is used for measurement, and the unit is mPa · s or Pa · s (Poiseuille) Is displayed.
Structural viscosity
Structural viscosity refers to the property that the viscosity of a liquid changes when it is agitated.Adhesives generally tend to decrease in viscosity as the rate of agitation increases to facilitate the application process (Thixotropythixotropy, But when automating for mass production, select a product number with structural viscosity characteristics that matches the specific coating method to reduce troubles during work. Is required to do.
Hydrogen ion index (pH)
Depending on the type of adherend, a strongly acidic or strongly alkaline adhesive may have an effect such as corrosion, and may have to be taken into consideration when selecting an adhesive.

Evaluation of adhesive strength

Destructive inspection

In order to evaluate the adhesive strength, a destructive inspection is performed to peel off the material to which the adherend is actually adhered.Since the strength greatly depends on the type of adhesive and the adherend and the adhesive conditions, when evaluating multiple adhesives, it is necessary to prepare a sample adhered under the same adherend and conditions. ..

The destructive inspection method at the time of bonding is specified by JIS K 6848.Destructive inspection is roughly divided into three types according to the direction of the force applied to the test sample.

  • Tension-Applies vertical stress to the adhesive surface.
  • shear (Sendan) -Apply stress in the parallel direction to the adhesive surface.
  • Peeling-Peel off the adherend.

Adhesive breakage generally occurs in the form of a mixture of the following three locations.The figure shows the case where the adherends are the same, and in the case where different materials are bonded, the fracture is a mixture of 3 points.It must be borne in mind that these fractures do not occur uniformly and are affected by external conditions such as adhesive thickness, destructive inspection method, sample dimensions, fracture rate, lifespan, temperature and humidity. ..The determination of these fracture points basically depends on the observation method.

Aggregate fracture (cohesive failure)
The hardened adhesive layer breaks.In this case, the adhesive often does not meet the required strength, and it is necessary to select the type or to make the conditions for bonding appropriate.
Adhesive failure (interfacial failure, Interface destruction)
The interface between the adhesive layer and the adherend layer is destroyed.In this case, the adhesive strength itself is considered to be insufficient.It is necessary to consider the surface condition of the adherend as well as the selection of the type or the optimization of the adhesive conditions.
Base material destruction (adhered failure)
The adherend itself is destroyed.In this case, the adhesive and the adhesive strength have sufficient strength, and rather it is necessary to consider the strength of the adherend.

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Non-Destructive Inspection

For inspection of adhesives that do not involve destruction, there are a tapping method (tapping method) or a transmission measurement method using ultrasonic waves.

the term

Functional adhesive
Adhesives that add other functions to the original performance of connecting objects, adhesives that are used in special environments, and adhesives that use special adhesive methods.Examples of function additions include conductivity, electrical insulation, elasticity, andFlame resistanceSuch.Examples of special environments are structural materials, heat resistance, cryogenic temperature resistance, underwater curing, transparency, and biological use.Examples of special bonding methods include ultraviolet curing, electron beam curing, and microcapsule type.
Solvent method
Methyl ethyl ketone (MEK) ・tolueneSynthetic resin can be dissolved and fused with an organic solvent such asacetoneUsingPhotographic filmA method of using the solvent itself as an adhesive, such as fusing.
Peeling liner (Release liner, Separator- Separator,Release paper / paper patternOr release film)
Paper or film that has been peeled off, such as by applying silicon.Protects the adhesive / adhesive surface of double-sided tape or film-like hot melt adhesive, and peels it off during use.
Part number
In general, adhesives are a complex mixture of various materials, and detailed formulations are designed to meet the required functions, especially in industrial applications.Trademarks and numbers attached to each of these adhesives.
Blocking (Blocking)
Trouble that the whole is hardened in the rolled state in tape-shaped adhesives.Normally, tape-shaped adhesives are provided with measures to prevent blocking on the back surface of the coated substrate, but they may occur due to changes over time or poor storage conditions.
Hotmelt(Hot melt adhesives,Thermoplastic adhesives)
The solid adhesive of the thermoplastic resin component is heated and melted.LiquidityIs applied (hot melt), applied, and cooled to cause physical cross-linking, which hardens and adheres.Although the bonding speed is fast, there is almost no open time.From workability issues, etc.Melting pointHigh molecular weight polymers are not suitable for use, resulting in low heat resistance.Equipment such as hot melt guns and heat presses, and equipment such as melt coating equipment and applicators are required to heat the adhesive.There is also a type of film-like material with a release paper attached, one side of which is adhered to an emblem or appliqué, and when necessary, the release paper is peeled off and hot-melt adhered to clothing.

Representative manufacturers and brands

References

  • "Adhesive Reader" Japan Adhesive Industry Association. 
  • "Adhesive Technology for Beginners (Introduction Course)" Japan Adhesive Society. 
  • "JIS Handbook Adhesion" Japanese Standards Association. 

footnote

[How to use footnotes]
  1. ^ a b c d e "Chemistry first story”. Japan Chemical Industry Association. 2020/2/10Browse.
  2. ^ a b c d e f Minoru Tsubota "Mechanical properties of the coating"Journal of the Japan Society of Color Material, Vol. 62, No. 3, Japan Society of Color Material, 1989, pp. 164-175," two:10.4011 / shikizai1937.62.164, ISSN 0010-180X, NOT 130004994407,2020/9/8Browse.
  3. ^ "Miscellaneous goods industrial product quality display regulations”. Consumer Affairs Agency. 2013/5/23Browse.
  4. ^ a b c d e f g h i "Adhesive knowledge". NS. 2020/9/8Browse.
  5. ^ "Nature's strongest glue could be used as a medical glue: IU News Room: Indiana University". newsinfo.iu.edu. 2021/5/16Browse.
  6. ^ a b c d e f "5. How to use adhesive”. Cemedine. 2020/9/8Browse.

Related item

  • Solution parameter
  • Post-it --We are using a weak adhesive that was accidentally discovered during research on a strong adhesive.

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