The quality of packing belts depends on the purity of polypropylene in Shaanxi packing belts . There are many types of packing belts on the market: pure polypropylene, polypropylene plus master batch, polypropylene plus recycled material, and polypropylene plus recycling. And masterbatch. The packing belt produced by pure polypropylene is completely transparent. The packing ground produced by polypropylene plus masterbatch is translucent. The packing belt produced by polypropylene plus recycled material is basically opaque. The packing tape produced by polypropylene plus master batch and recycled material is basically transparent. Completely opaque. There is also a packing belt made of fully recycled materials and calcium carbonate powder sandwich materials. The packaging tape produced by completely recycled materials is relatively soft. Only the surface of the core material belt is raw materials, and the rest are calcium carbonate powder (lime powder). The quality of the strapping depends entirely on the purity of the polypropylene. The higher the purity of the polypropylene, the better the pulling force of the strapping.
Connector of packing strap:
a) Hot melt lapping. It adopts heating methods such as electric thermal welding, mechanical high-frequency oscillation welding, and ultrasonic welding. The surface layer of the plastic tape is heated and melted. The two melting ends of the tape are overlapped and held for a certain time under a certain pressure. After the melting surface condenses, , The way to glue the plastic belt joint. This joint method is suitable for polypropylene plastic belts, because polypropylene plastic belts are mechanically fixed with iron buckles, and their strength is only 50% of the base material, and adhesive connections are not suitable.
b) Metal buckle. This method uses the one-way work of the tensioner ratchet to tighten the strap, then place an iron buckle at the joint, and then use clamps to cover the two layers of the strap with the iron buckle, and the side teeth of the iron buckle are uneven. Tooth shape, bite the strap so as not to loosen it. The iron buckle is usually made of galvanized iron sheet. During operation, the iron buckle of the appropriate size should be selected according to the model of the strap.
c) Ligation. This joint method uses soft plastic ropes, hemp ropes, etc. as binding materials, and the joints are tied with knots. This joint is not only strong and beautiful, but also easy to untie.
制成的。 The strap is made of PP and PET .
The main production process: melting of plastic granules --- pressing belt --- forming-cooling --- wrapping-packaging-storage packing belt system uses polypropylene through heating, melting, drawing The basic parameters that affect the quality of the packing belt are the tensile force, length, bending degree, and elongation. With the same tension and other parameters, the longer the length, the lower the cost.