Preparation method of PTFE (Poly Tetra Fluoro Ethylene) film for flexible sealing board
A sealing plate and soft technology, which is applied in the field of preparation of PTFE membranes for flexible sealing plates, can solve the problems of large vertical and horizontal strength differences, short service life, etc., to overcome mechanical damage, uniform vertical and horizontal pore diameters, and high strength high effect
Active Publication Date: 2013-05-15
浙江国泰萧星密封材料股份有限公司
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Problems solved by technology
[0004] The invention provides a method for preparing a PTFE film for a flexible sealing plate, which mainly solves the problem that the thickness of the PTFE double-stretched film in the prior art generally does not exceed 0.08mm, and the vertical and horizontal strengths vary greatly, and the service life is limited. Short, both need to be used together with other materials and other technical issues
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Embodiment
[0027] Embodiment: the preparation method of a kind of flexible sealing plate of this example PTFE film, its steps are:
[0028] a. Mixing materials to make embryos: Mix 370ml of solvent oil mixed solution with 1kg of polytetrafluoroethylene resin powder evenly. The mixing is to add the sieved PTFE dispersion resin into a dry and clean wide-mouth glass bottle, and the capacity should not exceed the glass bottle. 2 / 3 of the volume of the bottle, add the measured solvent oil mixed solution to the resin, try not to let the solvent oil mixed solution touch the bottle wall, press the bottle cap tightly to prevent it from volatilizing, and let the glass bottle be fully heated below 40 °C , Mix evenly, the speed of the mixing agitator is lower than 2 rpm, turn over for 10-20min, and then place the mixed mixture in an oven at 50°C to mature for more than 12h, so that the solvent and dispersant can fully and evenly enter the PTFE ethylene powder, and then put the mixture into the mate...
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Abstract
The invention relates to a preparation method of a PTFE (Poly Tetra Fluoro Ethylene) film, and particularly relates to a preparation method of a PTFE (Poly Tetra Fluoro Ethylene) film for a flexible sealing board. A bidirectional stretching film has the characteristics of large width amplitude of 2m, high strength in the vertical direction and the transverse direction, and ultra thickness. The PTFE film can be independently used for various air filter industries, further can be used for manufacturing an elastic PTFE board by using a laminated sintering method, and has very high technical values and market benefits. The preparation method of the PTFE film for the flexible sealing board, provided by the invention, mainly comprises the following steps of: (1) mixing and manufacturing a blank; (2) extruding and calendering; (3) calendaring in a compound manner; (4) vertically stretching; and (5) transversely stretching.
Description
technical field [0001] The invention relates to a preparation method of a PTFE membrane, in particular to a preparation method of a PTFE membrane for a flexible sealing plate. Background technique [0002] PTFE has excellent chemical resistance, temperature resistance, insulation, non-stick and self-lubricating properties. It has great use value in the fields of medicine, industry and environmental protection. It is a special engineering plastic. [0003] Since the American gore company invented the biaxially stretched film, the American gore company has used the biaxially stretched film to prepare expanded PTFE sheets with high compression resilience and excellent creep resistance, and various functional clothing fabrics and filter materials. Get huge industrial profits. At present, PTFE microporous biaxially stretched membranes have also been rapidly developed in China, but they are mainly used to make textile fabrics and composite with other porous materials to make vari...
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IPC IPC(8): B29C69/02B29C47/00B29C43/24B29C43/30B29C55/14B29L7/00B29K27/18
Inventor 孙锦龙孙李超
Owner 浙江国泰萧星密封材料股份有限公司