TPU film has superior performance and convenient molding process. It can be molded in the same way as ordinary rubber by mastication, mixing and vulcanization. It can also be cast, molded, centrifugally sprayed or sprayed in the form of liquid rubber. It can also be made into granular materials by injection, extrusion, calendering and blowing. Plastic molding process.
Together with its outstanding properties in terms of tension, tension, toughness and anti-aging, it is widely used in shoe materials and medical fields.
However, the misfortunes depend on each other and the contradictions depend on each other. Even if the products are perfect, there are also imperfections. The high temperature resistance, chemical resistance and dependence of raw materials on the TPU film have become three aspects that must be paid attention to.
In terms of performance, TPU film needs to pay attention to two aspects.
First, it is the chemical resistance of the TPU film. TPU film is not resistant to strong polar solvents and strong acid-base media. At a certain temperature, alcohol, acid and ketone will swell and degrade polyurethane elastomer. A solvent such as dichloromethane or trichloroethylene swells the TPU at normal temperature.
On the other hand, it is the high temperature resistance of the TPU film. Although the TPU film can not change the toughness under the severe cold of minus 30 degrees, it can not withstand high temperature. TPU has a large internal heat and high temperature resistance. The normal temperature range is -30 ° C to 80 ° C, so the TPU film should not be used at 120 ° C or above for a long time.
The third thing to pay attention to is the current domestic TPU film market, that is, the external dependence of TPU raw materials.