HIGH QUALITY THERMOPLASTIC RUBBER COMPOSITION

摘要

PURPOSE: Provided is a composition of high quality thermoplastic rubber which has good abrasion resistant, tearing strength and tensile strength properties. Conventional thermoplastic rubber is used in cheap products because it has poor mechanical strength and abrasion strength compared with thermoset rubber whose main use is a shoe sole material. CONSTITUTION: The composition comprises polystyrene thermoplastic rubber alone or thermoplastic resins such as thermoplastic olefin resin, ethylene/α-olefin copolymer, ethylene/vinylacetate copolymer in a ratio of 5-25wt.% to the polystyrene or blend with thermoset resins like natural rubber, synthetic rubber in the amount of not interfering thermoplastic character which is 3-15wt.%, together with usual additives such as an anti-oxidant, an anti-abrasion agent, a UV stabilizer and an improver for processing like silicone oil or silicone rubber of 0.5-7wt.%. The composition is characterized in that 5-25wt.% cheap shoe sole scraps of thermoplastic rubber is utilized and the melt flow index (MFI) is 0.01-10.