Thermoplastic Polyether-ester Elastomer (TPEE)

Properties and Characteristics
All grades of S TPEEs are block copolymers consisting of a hard segment of PBT and a soft segment based on polyether glycols.
The polyether-ester block copolymers, also named polyester rubber, combine the desirable elasticity of rubber and the strength of engineering plastics. The soft segment features it elasticity, and makes it like rubber; the hard segment features it processsing capability, and makes it like plastics. Compared with rubber, it has better processing capability and longer service life; compared with engineering plastics, TPEE has high strength, better flexibility and mechanical properties.
The available grades of SUNPRENETM TPEE are grouped into 4 categories by performance:
■ High-performance grades exhibit high structural strength, wide range of hardness, exceptional toughness and resilience; high resistance to creep, abrasion and flex fatigue; flexibility at low temperatures; and good retention of properties at elevated temperatures. In addition, they resist deterioration from many industrial chemicals, oils and solvents.
Applications:
·Automotive components: steering wheel jackets, shock absorber covers, dust cover of bellows, towed connecting cover, remote bellows, lock assembly of rear boot, door lock assembly, vibration-damping plate, hose shock reducer, airbag fittings, silent gears, pipe stopper, plug, ball joint, shock absorption stand of glasses, shock absorption chassis, stone attack resistance coating of chassis, etc.
·Footwear: sole of a shoe, heel of a shoe, wheels of skate
·Electrical appliance: cable jackets of grips of welding torch, elastic buttons of electrical equipment, antenna cover of wireless phone, wire and cable jackets, instrument, etc.
·Manufacturing industry: slide of elevator, high-pressure gasket, silent gears of recorder, silent gears of quartz clock, spring of cigarette machine, etc.
·Electric tools
·Sports requisites
·Plastic alloy

■ Extruding and blow molding grades provide excellent melt strength for making various kinds of covers and hoses coupled with the desirable characteristics of high-performance grades.
■ Flame retardant grades are used for applications requiring flame retardant.
■ Modified grades are used as an excellent plastic modifier for blending with POM and PBT to improve the impact resilience.
Processing
ALL grades of  TPEEs are supplied as cylindrical pellets. They shall be dried in dehumidified hopper dryer for 4 to 6 hours at the temperatures between 80 and 110℃. New materials can blend with the recovered ones, but the added quantity shall be no more than 25%.
·Inject molding: the temperature of pellets shall be 5 to 15℃ higher than the product melting range, the mold temperature shall be 20 to 50℃, injection pressure shall be 60 to 100 MPa.
·Extruding and blow molding: the best L/D ratio of screw shall be 24:1, the temperature of barrel shall be 5 to 10℃ higher than the product melting range