Preparation method for novel TPU (Thermoplastic Polyurethane) aramid fiber coated fabric
A technology for coating fabrics and aramid fibers, which is applied in the processing of textile materials, continuous processing of textile materials, textiles and papermaking, etc. It can solve the problems of poor tearing performance, low strength, poor oil resistance, etc., and achieve aging resistance. Good performance, stable chemical properties, good effect
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[0017] A kind of preparation method of novel TPU aramid fiber coated fabric of the present invention:
[0018] 1. The high-strength aramid fabric is heat-treated at 225--235°C for 30 minutes. After setting, the aramid fabric is treated with a surface treatment agent (CLJ001), and the aramid fabric is treated at 45--55°C. The drying time is 20-30 minutes. After drying, seal and store in a dry place for later use.
[0019] 2. Put the polyurethane elastomer into the hopper, seal the hopper, dry and dehumidify at 80°C-85°C for 4-5 hours before starting the extruder;
[0020] 3. Adjust the distance between the upper and lower dies of the machine head to ensure the thickness of the upper and lower rubber layers of the coated fabric;
[0021] 4. The preheating temperature of the machine head is 190-200 ℃, and the time is 4-5 hours. During the preheating process, turn on the tractor every 20 minutes and pull the aramid fabric out of the machine head 190--210mm to prevent the strip fr...
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