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What are the notes for the choice of adhesive ?

Mar 07, 2019

There are many factors to consider when selecting an adhesive, mainly the physical and chemical properties of the adherend, the conditions of use of the adherend, the manufacturing process of the adhesive material, the production cost, and environmental pollution.

(1) Select adhesive infusion according to the manufacturing process, choose solvent-free, low-viscosity adhesive; seal, choose paste, paste or putty adhesive.

(2) According to the chemical properties of the adherend, select the adhesive to bond the polar material (including steel, aluminum, titanium, magnesium, ceramics, etc.), and select the adhesive with strong polarity, such as epoxy resin, polyurethane glue, phenolic resin glue. , acrylate glue, inorganic glue, etc.; bonding weakly polar and non-polar materials (including paraffin, asphalt, polyethylene, polypropylene, polystyrene, (10), etc., acrylate adhesive, unsaturated polyester adhesive, or A solvent capable of dissolving an adherend such as chloroform, dichloroethane or the like is used.

(3) According to the physical properties of the adherend, the adhesive is selected to bond brittle and rigid materials (such as ceramics, glass, cement and stone), and thermosetting resin adhesives with high strength, high hardness and not easy to be deformed, such as epoxy resin fatty acid glue, Phenolic resin glue and unsaturated polyester glue; bonding elastic and tough materials (such as rubber, leather, plastic film, etc.), selecting adhesives with good elasticity and certain toughness, such as neoprene, polycyanate, etc.; bonding Porous materials (such as foam, sponge, fabric, etc.), select adhesives with higher viscosity, such as epoxy resin, polyurethane glue, polyvinyl acetate glue, rubber type adhesive.

(4) Select the adhesive with good toughness, such as rubber adhesive, polyurethane adhesive, etc. when the adhesive adherent is subjected to the peeling force and the uneven pull-off force according to the conditions of the adherent; the uniform tensile force and shear force of the adherend When it is used, choose a harder and brittle glue, such as the ring “resin glue, acrylate glue, etc.; when the adherend requires good water resistance, choose epoxy resin glue, polyurethane glue, etc.; when the adherend requires oil resistance, Select phenolic-butyronitrile glue, epoxy resin glue, etc.; according to the temperature of the adherend, such as epoxy resin glue is suitable to use below 120 ° C, rubber adhesive is suitable to use below 80 ° C, organic silica gel is suitable below 200 ° C For use, the inorganic glue is suitably used at 500 to 1000 °C.