Performance of TPU film
Performance of TPU film
TPU film, its application range is becoming more and more extensive. But how to improve the performance of TPU film? Let me tell you! Upgrading technology can very well improve the performance of TPU films. For example, methods to improve the heat resistance and hydrolysis resistance of TPU films:
The TPU film undergoes a variety of processes to obtain melt-spun spandex products. It is mainly produced by a one-step process: diisocyanate, polyether (ester) glycol, chain extender, additives, etc. are directly added to the twin-screw reactor after being measured and polymerized.
The method of adding prepolymer to the TPU film melt is used to improve the spinning processing conditions and the mechanical properties of the finished product. The specific method is to melt the TPU slices through a screw extruder, add a prepolymer formed by the reaction of diisocyanate and polyester or polyether diol at its outlet, and mix it evenly with a static mixer before spinning. On the one hand, adding prepolymer can lower the melting temperature of TPU slices, allowing spinning to be carried out at a lower temperature.
TPU film can be used for welded hollow products, fabric lamination, foam material sealing, protective coating and wear-resistant coating, etc. It can not only be bonded to various fabrics, but can also be produced by vacuum thermoforming with clear outlines and stable dimensions. Products; among them, the areas with the fastest growth rate are: shoe upper linings, thermal underwear, transparent underwear, elastic bands, medical breathable tapes, electronic and electrical surface protection materials, optical films, etc.
The TPU film and base fabric are processed through online casting and special lamination technology to achieve higher peel strength. After high-frequency welding, it is extremely resistant to impact and pressure, and is suitable for environments with harsher working conditions (mostly military industry, security products). When making medical devices, the thickness is generally thin, mostly 0.3mm.
TPU inflatable films are widely used and are often used in shoes and bags, personal protective equipment, clothing accessories, and even medical supplies. All TPU films must undergo a series of tedious and strict tests, and are sent to professional departments for testing at a fixed time every year. In addition to basic hardness, softness, and performance tests, there are also many safety and environmental tests, such as SGS environmental testing. , eight major metals, and halogen detection, etc. Ol4dne
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