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Preparation method of polytetrafluoroethylene glass fiber breathable varnished cloth

A technology of polytetrafluoroethylene and glass fiber, applied in varnished cloth, fiber treatment, textile material treatment, etc., can solve the problems of high glue content, high production cost, poor air permeability, etc., and achieve simplified preparation process and production cost Low, good air permeability

Inactive Publication Date: 2015-04-22
JIANGSU TAIFULONG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art (1) the air-permeable cloth obtained by compounding polytetrafluoroethylene microporous film and glass fiber cloth has complicated process, high production cost and unstable performance; (2) the method of directly coating glass fiber cloth with polytetrafluoroethylene emulsion , due to unreasonable emulsion formula, easy to produce bubbles, high glue content, poor air permeability, it is difficult to meet the specified technical requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of technique for preparing polytetrafluoroethylene glass fiber breathable varnish comprises the following steps:

[0029] (1) Pretreatment of glass cloth: 2.5% wax must be added as a lubricant to prevent breakage when glass yarn is woven into glass cloth, and it should be removed before dipping, otherwise it will not be easily infiltrated by PTFE emulsion, and the amount of glue applied will decrease. uniform. The pretreatment method is to bake at a high temperature of 450 ℃ in the sintering zone at a speed of 10 m / min, which can not only remove wax, but also remove fine glass fibers;

[0030] (2) Impregnated glass cloth: Immerse the pretreated glass yarn in step (1) into four dipping tanks containing polytetrafluoroethylene. The polytetrafluoroethylene contents of the dipping tanks are: 30%, 30%, 40%, 40% %, soaking time is 2m / min;

[0031] (3) Drying, drying the glass cloth soaked in step (2) at a drying temperature of 80-90°C, removing moisture, and making t...

Embodiment 2

[0036] A kind of technique for preparing polytetrafluoroethylene glass fiber breathable varnish comprises the following steps:

[0037] (1) Pretreatment of glass cloth: 2.5% wax must be added as a lubricant to prevent breakage when glass yarn is woven into glass cloth, and it should be removed before dipping, otherwise it will not be easily infiltrated by PTFE emulsion, and the amount of glue applied will decrease. uniform. The pretreatment method is to bake at a high temperature of 450 ℃ in the sintering zone at a speed of 12 m / min, which can remove wax and fine glass fibers;

[0038] (2) Impregnated glass cloth: Immerse the pretreated glass yarn in step (1) into four dipping tanks containing polytetrafluoroethylene. The polytetrafluoroethylene contents of the dipping tanks are: 30%, 30%, 40%, 40% %, soaking time is 2.5m / min;

[0039] (3) Drying, drying the glass cloth soaked in step (2) at a drying temperature of 85°C, removing moisture, and making the gray cloth slightly ...

Embodiment 3

[0044] A kind of technique for preparing polytetrafluoroethylene glass fiber breathable varnish comprises the following steps:

[0045] (1) Pretreatment of glass cloth: 2.5% wax must be added as a lubricant to prevent breakage when glass yarn is woven into glass cloth, and it should be removed before dipping, otherwise it will not be easily infiltrated by PTFE emulsion, and the amount of glue applied will decrease. uniform. The pretreatment method is to bake at a high temperature of 450 ℃ in the sintering zone at a speed of 15 m / min, which can remove wax and fine glass fibers;

[0046](2) Impregnated glass cloth: Immerse the pretreated glass yarn in step (1) into four dipping tanks containing polytetrafluoroethylene. The polytetrafluoroethylene contents of the dipping tanks are: 30%, 30%, 40%, 40% %, soaking time is 6m / min;

[0047] (3) Drying, drying the glass cloth soaked in step (2) at a drying temperature of 90°C, removing moisture, and making the gray cloth slightly dry...

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PUM

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Abstract

The invention relates to a preparation method of polytetrafluoroethylene glass fiber breathable varnished cloth. The preparation method comprises the following steps: (1) pre-treating glass cloth; (2) impregnating the glass cloth; (3) drying; (4) roasting; (5) sintering; and (6) cooling to obtain the polytetrafluoroethylene glass fiber breathable varnished cloth. The preparation process provided by the invention has the beneficial effects that by uniformly coating and impregnating alkali-free glass cloth by polytetrafluoroethylene emulsion, the glass fiber cloth is primarily moulded by impregnating, drying, roasting and sintering, so that the preparation process is simplified and the energy consumption is reduced; the polytetrafluoroethylene glass fiber breathable varnished cloth produced is free of bubbles on the surface, uniform in glue content, good in air permeability and low in production cost, has the high-temperature-resisting and high-strength performances of a glass fiber fabric, and also has a series of excellent performances such as insulation and anti-adherence of polytetrafluoroethylene. The polytetrafluoroethylene glass fiber breathable varnished cloth widely applied to all fields is a macromolecular composite material which is high in performance and diversified in function.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a preparation process of polytetrafluoroethylene glass fiber breathable varnish cloth. Background technique [0002] Glass fiber cloth has the advantages of high strength, stable size, high temperature resistance, good corrosion resistance and high filtration efficiency, but glass fiber also has obvious disadvantages, that is, brittle, not resistant to folding, not wear-resistant, easy to wear and break, affecting use life. [0003] PTFE microporous film is produced by biaxial stretching technology, has a unique microporous structure, large air permeability, low resistance, high particle retention rate, good temperature resistance, strong acid, alkali, organic solvent and oxidant resistance, Anti-aging and non-stick, non-flammable and non-toxic, biocompatibility and other characteristics, the current application technology of PTFE microporous memb...

Claims

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Application Information

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IPC IPC(8): D06C9/00D06B3/10D06B15/00D06C7/00
CPCD06N1/00D06N3/0022D06N3/0086D06N3/0093D06N3/047D06N2203/044D06N2209/123
Inventor 赵文杰赵晖侯金国
Owner JIANGSU TAIFULONG TECH
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