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Manufacturing method of film split polytetrafluoroethylene fibers

A technology of polytetrafluoroethylene and a manufacturing method, which is applied in the directions of fiber processing, textile and papermaking, single-component halogenated hydrocarbon rayon, etc., can solve the problem of unstable fiber strength and strength uniformity index, fiber elongation at break The indicators are unstable and the weight of fixed-length fibers is not easy to reduce, so as to achieve the effects of improved performance, thin fiber diameter and low production cost

Active Publication Date: 2011-05-11
ZHEJIANG HONGSHENG NEW MATERIAL TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The processing technique of existing polytetrafluoroethylene fiber, such as patent No. is zl200610026648.1, and the polytetrafluoroethylene fiber produced by the manufacturing method of a kind of polytetrafluoroethylene long fiber by name has following shortcoming: 1, the strong strength of fiber 2. The elongation at break index of the fiber is unstable, the uniformity of the material property, the uniformity of the fixed weight and other indicators are unstable; 3. The gram weight of the fixed-length fiber is not easy to reduce

Method used

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  • Manufacturing method of film split polytetrafluoroethylene fibers
  • Manufacturing method of film split polytetrafluoroethylene fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Mix polytetrafluoroethylene micropowder and aviation kerosene at a weight ratio of 39:11; stir the mixed raw materials at a stirring speed of 2r / min, a stirring temperature of 20°C, and a stirring time of 90 minutes, so that the raw materials are fully mixed.

[0046] Place the stirred mixed raw materials at a temperature of 40°C and let them stand for 48 hours to facilitate the comprehensive absorption of the lubricant by the polytetrafluoroethylene micropowder, so that the two can be fully mixed to make the prefabricated material required for processing.

[0047] Put the prefabricated material into the pre-pressing machine for pre-compression, the pressure is 0.5MPa, the pressing temperature is 20 ℃, and the prefabricated molding material is made; then the prefabricated molded product is put into the pusher for pressing, the pressing temperature is 160 ℃, the pressure is 3.5MPa, and then made into a columnar mold material.

[0048] The cylindrical mold material is cal...

Embodiment 2

[0054] Mix the polytetrafluoroethylene micropowder and aviation kerosene in a weight ratio of 81:19; stir the mixed raw materials at a stirring speed of 4r / min, a stirring temperature of 25°C, and a stirring time of 100min, so that the raw materials are fully mixed.

[0055] Place the stirred mixed raw materials at a temperature of 50°C for 50 hours to facilitate the comprehensive absorption of the lubricant by the polytetrafluoroethylene micropowder, so that the two can be fully mixed to make the prefabricated material required for processing.

[0056] Put the prefabricated material into the pre-pressing machine for pre-compression, the pressure is 0.6MPa, the pressing temperature is 25°C, and the prefabricated molding material is made; then the prefabricated molding is put into the pusher for pressing, the pressing temperature is 170°C, and the pressure is 3.8MPa, and then made into a columnar mold material.

[0057] The cylindrical mold material is calendered and pressed in...

Embodiment 3

[0063] Mix polytetrafluoroethylene micropowder and aviation kerosene at a weight ratio of 21:4; stir the mixed raw materials at a stirring speed of 5 r / min, a stirring temperature of 30°C, and a stirring time of 120 min, so that the raw materials are fully mixed.

[0064] Place the stirred mixed raw materials at a temperature of 60°C for 60 hours to facilitate the comprehensive absorption of the lubricant by the polytetrafluoroethylene micropowder, so that the two can be fully mixed to make the prefabricated material required for processing.

[0065] Put the prefabricated material into the pre-pressing machine for pre-compression, the pressure is 0.8MPa, the pressing temperature is 30°C, and the prefabricated molding material is made; then the prefabricated molded product is put into the pusher for pressing, the pressing temperature is 180°C, and the pressure is 4.2MPa, and then made into a columnar mold material.

[0066] The cylindrical molding material is calendered and pre...

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Abstract

The invention aims to provide a manufacturing method of film split polytetrafluoroethylene fibers with high intensity, high uniformity and low production cost. A process comprises the following steps of: mixing polytetrafluoroethylene micro-powder and a lubricant; stirring; standing; performing pre-compression molding; performing press molding; performing calendaring molding; drying; cutting; performing primary hot stretching; performing secondary hot stretching; performing heat shaping; and winding so as to obtain high-intensity polytetrafluoroethylene fibers. In the manufacturing process, temperatures during drying, cutting, primary hot stretching, secondary hot stretching and heat shaping rise in turn.

Description

technical field [0001] The invention relates to a method for manufacturing polytetrafluoroethylene fibers, in particular to a method for manufacturing polytetrafluoroethylene fibers by membrane splitting. Background technique [0002] PTFE fiber is a polymer thermoplastic material. Because of its unique perfluorocarbon molecular structure, PTFE has the advantages of corrosion resistance, high and low temperature resistance, low friction coefficient, non-combustibility (LOI is 95%), etc. It is widely used in aerospace, industry, medical and life. important application. Especially with the rapid development of modern industrialization, air pollution has become an increasingly serious global problem, and the treatment of pollutants has become a major issue, which requires higher performance of filter materials. Compared with existing fibers used for filter materials, PTFE fibers have significant advantages due to their excellent chemical stability, corrosion resistance, heat ...

Claims

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Application Information

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IPC IPC(8): D01F6/12D01D5/42
Inventor 宋朋泽
Owner ZHEJIANG HONGSHENG NEW MATERIAL TECH GRP CO LTD
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