PUR Hot Melt Adhesive Properties

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PUR Hot Melt Adhesive Properties PUR is abbreviated from moisture curing reaction type polyurethane hot melt adhesive. The main component is terminated isocyanate polyurethane prepolymer.PUR hot melt adhesive under the condition of inhibiting chemical reaction, heating and melting into fluid, for coating; After cooling, the adhesive layer condenses and plays a bonding role.Then with the help of the moisture in the air and the moisture attached to the surface of the viscous body reaction with ...


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PUR Hot Melt Adhesive Properties

PUR is abbreviated from moisture curing reaction type polyurethane hot melt adhesive. The main component is terminated isocyanate polyurethane prepolymer.PUR hot melt adhesive under the condition of inhibiting chemical reaction, heating and melting into fluid, for coating; After cooling, the adhesive layer condenses and plays a bonding role.Then with the help of the moisture in the air and the moisture attached to the surface of the viscous body reaction with it, chain expansion, the formation of high polymer, so that the adhesion force, heat resistance, low temperature resistance and so on significantly improved.
Ordinary hot melt adhesive category is very broad, and PUR is one of them, most of the hot melt adhesive is heating operation, the joint can be heated again after use, is reversible, and PUR is moisture reactive hot melt adhesive, heating operation, the joint and moisture in the air after the reaction, after the reaction is irreversible (i.e., heat will not melt).So PUR hot melt adhesive is more resistant to high temperature and low temperature.
PUR hot melt adhesive is characterized by high cohesion strength, high bond strength.High temperature and low temperature resistance, performance far beyond ordinary hot melt adhesive.The difference between the two mainly lies in the use of equipment, and storage environment and way.PUR hot melt adhesive must be isolated from the air, will react with the water in the air, PUR hot melt adhesive is now more popular adhesives, widely used in various fields.

PUR hot melt adhesive is used for bonding narrow frame mobile phone, mobile phone without frame, flexible curved screen mobile phone TP and the middle frame.It has excellent bonding performance and has passed various tests.And has the easy disassembly, does not damage the material.

 

Characteristic of one component reactive polyurethane hot melt adhesive is that the hot melt adhesive will continue to interact with the water in the environment after physical curing, and the chemical crosslinking reaction will occur. A small amount of carbon dioxide is produced in the crosslinking reaction and released into the atmosphere from the surface of the film. after the cross-linking reaction, the polymer with high cohesion is generated. Once solidified, it shows extraordinary water resistance, chemical corrosion resistance and high weather resistance.Reactive polyurethane hot melt adhesive with polyurethane as matrix material, so has the common characteristic of polyurethane and a reactive hot melt adhesive for many difficult sticky material surface has a strong stick relay, using range is very wide, not only can cohere porous materials, such as: foam plastic, ceramic, wood, fabric, etc., and can cohere the material of the surface is bright and clean, such as: stainless steel, aluminum, metal foil, leather and rubber, etc.

At the same time, the bonding between porous materials and surface smooth materials is also very good, can achieve quite high cohesion strength. and can according to the need to deploy flexible to rigid PUR hot melt adhesive. at present is mainly used in the automotive industry seal bond (lamp, ceiling, instrument, decoration, etc.), washing machines and disinfection cabinet top plate seal bond, sports shoes sole joint, PET and PVC transparent packing box bond, textile fabrics such as composite, geothermal high-grade bond, ABS plate joint, high-grade floor of window of model steel door sticker, stick the bond, fishing paraphernalia bond strap, bookbinding, paper and plastic composite, bonding of electric blanket, bonding of receiver antenna, assembly of indoor and outdoor building components, panels and frames, doors and windows frames, laying of waterproof materials such as roof, basement and tunnel, etc.With the continuous improvement and improvement of technology and the reduction


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