This article takes you to a quick understanding of engineering adhesives

Industrial adhesives a wide variety of performance, the choice of adhesives when a variety of comprehensive considerations, in order to achieve the best bonding effect.
1, according to the chemical properties of the viscose substrate to choose adhesives
(1) bonding polar materials (e.g. steel, aluminum, titanium, magnesium, ceramics, etc.) recommend the selection of extreme adhesives, such as epoxy resin, polyurethane glue, phenolic resin, acrylic adhesive, inormeric adhesive;
(2) Adhesive weak polar and non-polar materials (e.g. paraffin, asphalt, polyethylene, polypropylene, polystyrene, ABS, etc.) should be selected acrylic adhesives, unsaturated polyester or solvents that can be dissolved by the adhesive material.
2, according to the physical properties of the adhesive selection adhesive
(1) bonding brittle or rigid materials (such as ceramics, glass, cement and stone, etc.) coating online recommended high strength, hardness and non-variable thermostate resin adhesives, such as epoxy resin, phenolic resin and unsaturated resin adhesive;
(2) bonding elastic materials or tough materials (e.g. rubber, leather, plastic, film, etc.) should choose a good elastic, have a certain toughness of adhesives, such as neoprene, polyurethane glue, modified silane glue, rubber-type adhesives;
(3) bonding porous materials (e.g. foam, sponges, fabrics, etc.), should choose a more viscous adhesive, such as epoxy resin glue, polyurethane glue, modified silane glue, hot melt, polyvinyl acetate, rubber adhesive;
(4) According to the expansion coefficient of the substrate to choose the adhesive, the expansion coefficient of most substrates at normal temperature is similar, can not be carefully considered, but at high and low temperatures or bonding area is too large, It is important to consider factors similar to the expansion coefficient of the adhesive and substrate

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3, according to the process method to choose adhesive
(1) perfusion process, generally choose solvent-free, low viscosity adhesive;
(2) sealing or large area bonding adhesive commonly used scraping, dot coating and other processes, often choose paste, paste adhesive;
(3) precision fine contact surface bonding, sealing, repair often choose liquid adhesive.
4, according to the product environment to choose adhesives
(1) according to the temperature of product use to choose different adhesives, such as temperature use, hot melt, instantaneous glue and other adhesives can be satisfied;
(2) According to the product use of the natural environment to choose adhesives, such as hot and cold, wet, ultraviolet radiation and other outdoor environments, should consider its weather resistance, optional silicone adhesive, epoxy,
polyurethane glue, modified silane and other adhesives;
(4) Select adhesives based on the physical environment in which the product is used, such as force, vibration, pressure and other factors at the bonding site.
5, according to the special functional needs of the selection of adhesives
such as bonding, sealing, conductivity, insulation, flame retardant, thermal insulation, thermal conductivity, leak prevention and other needs to choose adhesives with a certain function.
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