Preparation method of thermoplastic polyurethane composite material

Abstract

The invention discloses a preparation method of a thermoplastic polyurethane composite material, and belongs to the technical field of calendering products. The preparation method of the thermoplastic polyurethane composite material is characterized in that open milling and roller covering are carried out through an open mill on thermoplastic polyurethane particles after the thermoplastic polyurethane particles are dried and dewatered, the thermoplastic polyurethane particles are manufactured into blank blocks, and put into a planetary extruder, plastification and vacuum defoamation are carried out, then the hermoplastic polyurethane particles are put into a four-roll calender to become a film in a calendering mode, fabric and the thermoplastic polyurethane film are compounded, and at last the thermoplastic polyurethane composite material is obtained. The invention provides a lamination method of thermoplastic polyurethane and a fabric layer, open milling and plastification are carried out on the thermoplastic polyurethane, the thermoplastic polyurethane becomes the film after hot melting and calendering, then the film is directly compounded on the fabric, an ordinary machining method of the thermoplastic polyurethane is improved, and the specifications and styles of the thermoplastic polyurethane are enabled to be diversified.

Description

technical field [0001] The invention relates to a preparation method of a thermoplastic polyurethane composite material, in particular to a composite preparation method of polyether thermoplastic polyurethane film-forming and fabric on an inverted L-shaped four-roller calender, and belongs to the technical field of calendered products. Background technique [0002] Calendering is mainly used to produce plastics and sheets, and different calendered products can be obtained according to different processes. It is widely used in industry, agriculture, national defense, medical and health care, and daily necessities in the national economy. In industry, calendered products are mainly used for waterproof covering, car decoration and large-scale equipment packaging covering, etc.; It is widely used in the production of raincoats, luggage, clothing, toy packaging, etc. Rolled products have a wide range of applications and are closely related to people's lives. Calendered products...

AI Technical Summary

Problems solved by technology

[0003] In China, the main processing material for calendering is polyvinyl chloride resin. Although polyvinyl chloride film is widely used, there are many shortcomings in polyvinyl chloride products due to the limitation of its material characteristics. For example, pure polyvinyl chloride cannot be processed, so In order to make it have various characteristics, some additives and plasticizers are added during processing. These additives and plasticizers generally have a certain degree of toxicity. Vinyl chloride plastic has a short service life, poor wear resistance and weather resistance, it will become hard and easy to break when the temperature is low, and cracks will occur in severe cases, making it unusable, which limits the scope of use of rolled products in many aspects