TPEE Film

Mechanical properties
By adjusting the ratio of soft and hard segments, the hardness of TPEE can be changed from Shore D32 to D80, and its elasticity and strength are between rubber and plastic. Compared to other thermoplastic elastomers (TPEs), TPEE has a higher modulus than other TPEs of the same hardness at low strain.

Tensile strength
Compared with polyurethane elastomers (TPU), the compressive and tensile modulus of TPEE are much higher, and if the same part is made by TPEE and TPU of the same hardness, the former can withstand larger loads. Above room temperature, TPEE has a high flexural modulus and is suitable for making cantilever beams or torsion-type parts, especially for high-temperature parts.

Heat resistance
TPEE has excellent heat resistance, the higher the hardness, the better the heat resistance. The use temperature of TPEE is very high, so it can adapt to the baking temperature of the automobile production line (150 to 160 ℃), and it has little loss of mechanical properties at high temperature. When it is used above 120°C, the tensile strength of TPEE is much higher than that of TPU. In addition, TPEE also has excellent low temperature resistance.

Chemical resistance
TPEE has excellent oil resistance and is resistant to most polar liquid chemical media (such as acids, alkalis, amines and glycol compounds) at room temperature, and its chemical resistance increases with its hardness. TPEE has good anti-swelling performance and anti-penetration performance to most organic solvents, fuels and gases, and its permeability to fuel is only 1/3 to 1/300 of that of oil-resistant rubber such as neoprene, chlorosulfonated polyethylene, and nitrile rubber.

Weather resistance and aging resistance
TPEE has excellent chemical stability under various external conditions such as water mist, ozone, and outdoor atmosphere. Like most TPEs, they will degrade under the action of UV light, so in terms of outdoor applications or where the product is exposed to sunlight, UV light protection additives, including carbon black and various pigments or other shielding materials, should be added to the formulation.

High resilience
The application of TPEE material to the spring can make the spring have a long service life, which can help the train start, accelerate, decelerate and stop smoothly. Unlike metal springs, it will not rust, deteriorate under natural conditions, or cause elastic cracks and losses.

Processability
TPEE has excellent melt stability and sufficient thermoplasticity, so it has good processability and can be processed by various thermoplastic processing technologies, such as extrusion, injection, blow molding, rotational molding and melt casting. At low shear rates, TPEE melt viscosity is insensitive to shear rate, while at high shear rates, its melt viscosity decreases with increasing shear rate.