LOW HARDNESS THERMOPLASTIC ELASTOMER AND DIAPHRAGM USIGN THE SAME

摘要

PURPOSE: A low hardness thermoplastic elastomer composition is provided to have low hardness of 0.1-40A(Shore A), and to improve physical properties, especially ductility. CONSTITUTION: A thermoplastic rubber composition includes 30-40 wt% of a block terpolymer of an aromatic vinyl compound and alkene compound; 25-50 wt% of a paraffin oil; 1-5 wt% of a polyolefin-based resin; 5-20 wt% of an inorganic additive; and 5-15 wt% of a polyphenylene ether-based resin;. A diaphragm is formed of the thermoplastic rubber composition, has a tensile strength at 100 °C and ASTM D638 is 15-25 kgf/cm2 or more and abrasive amount by ASTM D4060 after 12,000 times is 2g or less.