(1) basic polymers, such as ethylene vinyl acetate copolymer, styrene butadiene styrene copolymer (SBS), styrene isobutene styrene (SIS) block copolymer, can be used as the basic polymer of hot melt adhesive and determine the basic properties of hot melt adhesive.
(2) the tackifying resin commonly used C5 petroleum resin, terpene resin phenolic resin!!! Terpene phenolic resin, rosin modified rosin!! "the function is to increase the initial adhesion and permanent bonding strength, lower melt viscosity of hot melt adhesive material, improve wettability, improve the operating performance of low temperature hot melt adhesive Po in Hong Kong
(3) common viscosity regulators of melt viscosity regulators are waxes, such as paraffin wax, microcrystalline wax, polyethylene wax and so on. The action is to regulate melt viscosity, improve fluidity, increase wettability, speed up solidification and prevent agglomeration of hot melt adhesive.
(4) plasticizers commonly used plasticizers such as phthalates in two formic acid and two octyl phthalate two! Two formic acid benzyl ester tricresyl phosphate! "Role is to reduce the intermolecular secondary force, improve the toughness of hot melt adhesive! Cold and melt flow rate, lower melting point" but should control the amount of otherwise, will reduce the cohesive strength of the adhesive layer"
(5) anti oxidants such as 2,6- tert butyl p-cresol! Phosphite three benzene ester, adding anti oxidant can prevent the hot melt under high temperature oxidation and decomposition, in the use of poor thermal stability of raw materials, must join the anti oxidant"
(6) filling agents such as calcium carbonate, silica and talcum powder "accelerate the curing speed of hot melt adhesive, reduce shrinkage, prevent penetration, increase heat resistance and reduce cost". Excessive amount of melt, viscosity and viscosity of rubber melt.