Method for preparing high-performance PTFE fiber paper

A technology of polytetrafluoroethylene and high-performance fibers, which is applied in fiber types, fiber processing, textiles and papermaking, etc., can solve the problems of high energy consumption and many processes, and achieve low energy consumption, short process, chemical corrosion resistance and flame retardant effect

Active Publication Date: 2017-04-19
常州市兴诚高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the existing polytetrafluoroethylene fiber paper adopts the wet papermaking process. Although the fiber paper is uniform, there are many processes and high energy consumption. It is urgent to simplify the process of producing fiber paper.

Method used

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  • Method for preparing high-performance PTFE fiber paper
  • Method for preparing high-performance PTFE fiber paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of polytetrafluoroethylene high-performance fiber paper, the specific steps are:

[0026] (1) Treat the polytetrafluoroethylene fiber with an antistatic agent:

[0027] The PTFE fiber was sprayed with 0.5% potassium phosphate monoester antistatic agent (TF-481) solution by weight, and was allowed to stand for 24 hours at a temperature of 20±1° C. and a humidity of 65±2%.

[0028] (2) After the PTFE fiber treated with antistatic agent is opened, it is fed into the roller carding machine and evenly laid into a fiber web, with a gram weight of 70g / m2. 2 , and hot-rolling the fiber web for 60 s under the conditions of a hot-rolling temperature of 360° C. and a pressure of 30 MPa to obtain a polytetrafluoroethylene high-performance fiber paper. The results of thermogravimetric analysis showed that the fiber paper began to decompose at 508 ° C, showing good thermal stability; the limiting oxygen index of the fiber paper was measured to be 95%, showing ex...

Embodiment 2

[0030] A preparation method of polytetrafluoroethylene high-performance fiber paper, the specific steps are:

[0031] (1) Treat the polytetrafluoroethylene fiber with an antistatic agent:

[0032] The PTFE fiber was sprayed with 0.5% potassium phosphate monoester antistatic agent (TF-481) solution by weight, and was allowed to stand for 24 hours at a temperature of 20±1° C. and a humidity of 65±2%.

[0033] (2) After the PTFE fiber treated with the antistatic agent is opened, the PTFE and the long-staple cotton fiber are mixed in a weight ratio of 80 / 20 and fed into the roller carding machine to be evenly laid into a fiber web, with a gram weight of 107g per square meter. / m 2 , the form see figure 1 . The fiber web is hot-rolled for 70s at a hot-rolling temperature of 375°C and a pressure of 30MPa to obtain PTFE high-performance fiber paper, such as figure 2 As shown, the surface is black because the cotton fibers are carbonized at high temperature. The results of therm...

Embodiment 3

[0035] A preparation method of polytetrafluoroethylene high-performance fiber paper, the specific steps are:

[0036] (1) Treat the polytetrafluoroethylene fiber with an antistatic agent:

[0037] The PTFE fiber was sprayed with a cationic antistatic agent (SN) solution with a weight concentration of 0.5%, and was allowed to stand for 24 hours at a temperature of 20±1° C. and a humidity of 65±2%.

[0038] (2) After the PTFE fiber treated with antistatic agent is loosened, PTFE and water-soluble vinylon fiber are mixed in a weight ratio of 80 / 20 and fed into a roller carding machine to be evenly laid into a fiber web, with a gram weight of 150g per square meter. / m 2 . The fiber web was soaked in hot water to remove water-soluble vinylon fibers, and then hot-rolled for 90 s under the conditions of a hot rolling temperature of 380° C. and a pressure of 50 MPa to obtain a polytetrafluoroethylene high-performance fiber paper. The results of thermogravimetric analysis showed tha...

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Abstract

The invention provides a method for preparing a piece of high-performance PTFE fiber paper. The method comprises: antistatic-agent processing is carried out on PTFE fibers; opening is carried out on the PTFE fibers after the antistatic-agent processing to form a fiber net and hot rolling is carried out on the fiber net to obtain a piece of high-performance PTFE fiber paper; or after opening is carried out on the PTFE fibers after the antistatic-agent processing, the processed fibers are fixed with other fibers to form a fiber net and then hot rolling is carried out on the fiber net to obtain a piece of high-performance PTFE fiber paper. According to the method provided by the invention, the way of carding of the fibers into the net and the high-temperature hot rolling way are combined to prepare the high-performance PTFE fiber paper. The preparation method has characteristics of short flow, low energy consumption, and high production efficiency. The prepared fiber paper having advantages of excellent heat-resistant, thermostability, chemical-corrosion-resistant, and flame-retardant properties can be applied to high-temperature filtering or corrosive solution filtering and can be used repeatedly.

Description

technical field [0001] The invention relates to the field of high-precision filtration, in particular to the use of the manufacturing process technology of polytetrafluoroethylene (PTFE) high-performance fiber paper to prepare PTFE fiber paper with the advantages of heat resistance and chemical corrosion resistance, which is applied to the field of high-precision filtration. Background technique [0002] Polytetrafluoroethylene (PTFE) fiber has the advantages of excellent heat resistance and thermal stability, chemical resistance, low friction coefficient, flame retardancy, etc., and is used in high temperature filtration, protective clothing, waterproof coating and other fields. PTFE fibers can be produced by carrier spinning, paste extrusion and slitting. [0003] In recent years, high-performance fiber paper used in special fields such as insulation, flame retardant and corrosion resistance has become a research hotspot. The raw materials for preparing high-performance fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4318D04H1/54D04H1/4382D04H1/74D04H1/732D06M13/292D06M101/22
CPCD04H1/4318D04H1/4382D04H1/54D04H1/732D04H1/74D06M13/292D06M2101/22
Inventor 徐广标王瑞柳代艳红何正兴何越超
Owner 常州市兴诚高分子材料有限公司
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