Advanced Elastomer Systems Trefsin® 3201-65 W305 Thermoplastic Rubber  (discontinued **)

A natural thermoplastic elastomer with excellent permeation resistance to water, air and other gases. It can be processed using injection molding, extrusion, blow molding or other melt processing techniques.Key Features: Permeability - Typical Values - Air permeation rate @ 23°C (73°F), (ASTM D 1434) 57 cm3.mm/m2.day.atm; Oxygen transmission rate @ 23°C (73°F) and 50 to 75% relative humidity (ASTM D 1434) 64 cm3.mm/m2.day.atm; Water vapor transmission rate @ 37.8°C (100°F) and 90% relative humidity (ASTM F 1249) 0.57 g.mm/m2.day; TREFSIN rubber is also relatively impermeable to a wide variety of other fluids and gases, and exhibits good resistance to various chemicals, heat and weathering.Additional processing comments: This thermoplastic rubber is a shear-dependent material that can be processed on conventional thermoplastic equipment for injection molding, extrusion, or blow molding. For extrusion, a general purpose screw with a compression ratio of 2.5 to 3.0 is recommended. Material can be recycled. TREFSIN rubber is incompatible with acetal and PVC.Values below are for injection molded plaques, side gated, 82.6 mm x 117.5 mm x 3.0 mm. Tensile properties measured across flow. Data provided by Advanced Elastomer Systems.Advanced Elastomer Systems is now a part of ExxonMobil. This grade was removed from the Advanced Elastomers Systems standard product line before the ExxonMobil acquisiton.