Thermoplastic Polyester Elastomer TPEE Suitable For Injection Moulding And Extrusion Blendable Heat- And Weather-resistant

Thermoplastic polyester elastomer (TPEE) combines the high elasticity of rubber with the thermoplastic properties of engineering plastics, making it an easily processable thermoplastic elastomer. The chain segments of TPEE consist of crystalline 'hard' segments and amorphous 'soft' segments in varying proportions; an increased proportion of hard segments enhances physical rigidity and chemical stability, whilst an increased proportion of soft segments improves flexibility and low-temperature performance.

This product can be used to improve the high- and low-temperature impact strength (toughness), flexibility and compatibility in blending systems of plastics, whilst providing a certain degree of elasticity. It can be processed using conventional thermoplastic moulding techniques, such as injection moulding or extrusion; it can be used to modify POM, PBT and PET, or blended with PVC, PP, polyacetal and α-olefin alternation copolymers, as well as with other elastomers.

• Excellent mechanical properties: High impact strength and high tear strength, with good abrasion resistance.
• Fatigue resistance: Retains its properties even after repeated bending and twisting, with good creep resistance.
• Chemical and oil resistance: Offers good resistance to most greases, mineral oils, fuel oils and chemical solvents.
• Weather resistance and low-temperature flexibility: It can withstand long-term environmental ageing caused by UV radiation, rain, snow and ozone, whilst ensuring it remains flexible in extremely cold conditions without becoming brittle or cracking, and adapts to seasonal temperature fluctuations.
• Stable performance: Low water absorption; effectively resists moisture penetration from the environment and exhibits good dimensional stability.
• Ease of processing: Rapid crystallisation and easy moulding; can be processed using standard thermoplastic equipment for injection moulding, extrusion and blow moulding.
• Wide range of hardness: Typically ranging from Shore D 20D to 80D; properties can be precisely adjusted by altering the ratio of hard and soft segments.
• Environmental friendliness and recyclability: Free from plasticisers and halogens, it complies with environmental requirements, and processing waste and end-of-life parts can be recycled and reused.

Flame-retardant thermoplastic TPEE is a specialised modified TPEE grade developed by our company. It is low-toxicity and environmentally friendly, available in both halogenated and halogen-free variants, and achieves a flame-retardancy rating of up to V0. It is widely used in automotive components, electronic and electrical appliances, telecommunications cables, sports equipment and household goods.

• TPEE must be pre-dried prior to processing to ensure the resin remains dry during the processing stage.
• When temperatures exceed the melting point, moisture in the resin can cause hydrolysis, leading to a deterioration in the resin's physical properties and making it prone to brittleness. Generally, hydrolysis does not occur when the moisture content is below 0.1%. Therefore, exposed material must be re-dried prior to use (recommended conditions: drying at 80°C for 3-4 hours, or at 60°C overnight).
• TPEE's excellent processability allows it to be moulded into various products without difficulty using plastic processing methods such as injection moulding, extrusion and blow moulding. The processing temperature for this product ranges from 180°C to 260°C, with the specific temperature depending on the process and grade. The melting points of all standard grades are notably stable.

Due to its unique combination of properties, TPEE is widely used in the following areas:

• It is used in track-mounted pads for rail transport, such as vibration-damping pads for light rail, high-speed rail, underground railways and heavy-haul railways. It offers a suitable dynamic-to-static ratio and good resilience.
• It is widely used in the manufacture of automotive components, such as engine intake manifolds, drive shaft dust covers, airbag housings, automotive fuel vapour lines, fuel tanks and air brake lines. Thanks to TPEE's excellent chemical and weather resistance, it offers superior performance and a longer service life than other elastomers when used in automotive structural components.
• Used in the electronics and electrical sectors, such as fibre-optic cables, communication cables and antennas. It exhibits good heat resistance, elasticity, creep resistance and insulating properties.
• Used in industrial products such as hydraulic hoses, air hoses, gears, robotic arms, couplings, seals, washers and shock absorbers.