A kind of processing method of the rolling calender of polyether type TPU composite material

Abstract

The invention relates to a novel processing method of a polyether type TPU (Thermoplastic Polyurethane Elastomer) composite material in an opening refining calender. The novel processing method comprises the steps of: (1), drying a mixing material; (2) forming a blank and removing bubbles; and (3) calendering and jointing, namely under the condition that the setting temperature of a four-roller calender is 160-170 DEG C, forming a film being 0.10-0.15mm on each roll surface after a polyether TPU material after plastifying is put, compositing each film with a piece of polyester filament yarn base cloth under infrared preheating, fitting under the pressure of 45-50KG, cooling and sizing so as to obtain the polyether type TPU composite material. For the composite material provided by the invention, the processing thickness is rapidly adjusted, a tensile strength test is increased by 25% compared with that of the original base cloth, the tearing strength is increased by 27%, a TPU calendering cloth is prepared by using a four-roll calendering method, the variety style is varied, the thickness range is adjusted at will, and thus a finished product has various excellent properties such as high watertightness, wear resistance, ageing resistance and corrosion resistance of the conventional thermoplastic polyurethane, so that the using field and processing requirement range of thermoplastic polyurethane are greatly enlarged, and further the composite material well meets the marketable requirement.

Description

【Technical field】 [0001] The invention relates to the technical field of polyether-type thermoplastic polyurethane elastomers, in particular to a processing method of a polyether-type TPU composite material with an open rolling calender. 【Background technique】 [0002] Calendering is mainly used to produce plastics and sheets, and different calendered products can be obtained according to different processes. The current main product of calendering is soft polyvinyl chloride film, which is widely used in industry, agriculture, National defense, medical and sanitation, and daily necessities, etc. In industry, it is mainly used for waterproof covering, car decoration and large-scale equipment packaging covering, etc. In agriculture, it is used for seedling raising, greenhouse covering, heat preservation and sunshade, preventing water and soil erosion, etc. In daily life It is used to make a large number of raincoats, bags, clothing, toy packaging, etc. It has a wide range of a...

AI Technical Summary

Problems solved by technology

[0007] In China, the main processing material for calendering is polyvinyl chloride resin. Although polyvinyl chloride film is widely used, due to the limitation of its material characteristics, polyvinyl chloride products also have many shortcomings. 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 certain toxicity. When processing and using, they have a strong plastic taste and are not conducive to health. PVC 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