Thermal stretch processing method of ultra-high molecular weight polyethylene diaphragm

Abstract

The invention discloses a thermal stretch processing method of an ultra-high molecular weight polyethylene diaphragm, comprising the following steps of: (1) taking raw materials of ultra-high molecular weight polyethylene resin, polyethlene wax, a plasticizer and an antioxidant for backup according to the following proportion by weight; (2) after mixing the mixture, putting the mixture into a single screw extruder to extrude a tube; (3) arranging a cutting tool on the lower part of an outlet of a tube mould of the single screw extruder to longitudinally cut the tube; (4) putting the cut tube into a wedge mould, spreading the tube into a plate material; (5) rolling the plate material into a diaphragm blank; (6) stretching the diaphragm blank when passing through a first heating channel; (7) guiding the rolled and stretched diaphragm blank into a second heating channel to heat; (8) guiding the heated diaphragm blank into a fourth calendar to roll and stretch the diaphragm blank rolled by the fourth calendar into a diaphragm product; and (9) forming the diaphragm product by a forming machine, and winding the diaphragm product. The finished product processed by the thermal stretch processing method has low cost and high efficiency, the tensile strength of the finished product can reach above 300MPa, the elasticity modulus can reach above 100g / d, and the like.

Description

technical field [0001] The invention relates to a high-molecular-weight polyethylene product, and relates to a heat-stretching processing method for an ultra-high-molecular-weight polyethylene film. Background technique [0002] Products made of ultra-high molecular weight polyethylene film materials have a variety of high-quality properties such as extremely high tensile strength and abrasion resistance. Therefore, ultra-high molecular weight polyethylene film products have been gradually applied in various fields. However, it is a difficult process to make ultra-high molecular weight polyethylene material into a film. In foreign countries, thick plates or cylinders made by sintering ultra-high molecular weight polyethylene are generally used, and then stretched into films by unidirectional or bidirectional stretching after slicing. The disadvantages of this film manufacturing method are: the film width of continuous production cannot be arbitrarily increased according to ...

AI Technical Summary

Problems solved by technology

The disadvantages of this film manufacturing method are: the film width of continuous production cannot be arbitrarily increased according to needs; the processing equipment is complicated; Take the filter membrane as an example, the price of a 0.012 mm thick film is generally 180 yuan / m 2

This expensive price hinders the expansion of the application range of ultra-high molecular weight polyethylene film

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