Preparation method of poly(perfluoroethylene-propylene) fiber

A polyperfluoroethylene propylene and fiber technology, which is applied in the field of fluoroplastics processing, can solve the problems of high resin melt viscosity, wire breakage, low modulus processing obstacles, etc., and achieves low cost, improved mechanical strength, and process equipment. simple effect

Inactive Publication Date: 2012-03-21
SHANGHAI PLASTICS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the process of converting FEP from resin to fiber, due to the high melting point of FEP, special equipment and technology are required for high-temperature molding; the high melt viscosity of the resin makes it easy to break the wire during spinning head problem; the low modulus of FEP resin will encounter great obstacles in subsequent processing such as drawing and crimping

Method used

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  • Preparation method of poly(perfluoroethylene-propylene) fiber
  • Preparation method of poly(perfluoroethylene-propylene) fiber
  • Preparation method of poly(perfluoroethylene-propylene) fiber

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) The raw material is polyperfluoroethylene propylene resin chips produced by Daikin Company, the brand is NP-20, and the melt index is 4.3-8.7g / 10min;

[0032] (2) Put FEP resin slices into a single-screw extruder with a screw diameter of Φ50mm, and set the temperature of the C1 zone to 260°C, the temperature of the C2 zone to 300°C, and the temperature of the C3 zone to 330°C. The temperature in zone H is 360°C, and the temperature in zone D is 350°C.

[0033] (3) The number of spinneret holes is 3000, the capillary hole diameter is 0.5mm, and the capillary aspect ratio is 2:1. The spinneret was heated to a temperature of 350°C.

[0034] (4) After the resin is formed into fibers, it enters the cooling water tank with rollers. The water temperature of the cooling water tank with rollers is controlled at 70°C, and the length of the fibers passing through the cooling water tank with rollers is 1.5m.

[0035] (5) After cooling, the tow is drawn through the first dryin...

Embodiment 2

[0040] Repeat Example 1, but in step (6), the line speed of the first drafting roll is constant, and the line speed of the second drafting roll is changed to 36m / min, and then the second drawing is carried out through the third drafting roll. The linear velocity of the three drafting rollers was 86.4 mm, and then stretched three times by the fourth drafting roller, and the linear velocity of the fourth drafting roller was 147 m / min. The total draw ratio is 1:12.2, and the heating temperature of the draw rollers is 200°C. The resulting fiber has a wire diameter of 0.02 mm.

[0041] In the present invention, the preparation of polyperfluoroethylene propylene can produce fibers with various wire diameter specifications through adjustable spinning and drawing processes, and the prepared polyfluoroethylene propylene fibers have excellent mechanical strength, durability Thermal properties, chemical resistance, non-adhesiveness, hydrophobicity, low wear and electrical insulation, ca...

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Abstract

The invention relates to a preparation method of a poly(perfluoroethylene-propylene) fiber. The preparation method comprises the following steps: (1) raw material preparation; (2) melt extrusion; (3) spinning and shaping; (4) cooling; (5) heating and drying; (6) drawing; (7) heat treatment; and (8) coiling and packing. The poly(perfluoroethylene-propylene) fiber prepared by the preparation method provided by the invention has the advantages of excellent mechanical strength, heat resistance, chemical resistance, non-adhesion property, hydrophobicity, low abradability and electric insulation property, and can be widely applied in braided fabrics, sports requisites, building decoration, medical articles and other industrial fields.

Description

technical field [0001] The invention belongs to the technical field of fluoroplastic processing, and in particular relates to a preparation method of polyperfluoroethylene propylene fibers. The polyperfluoroethylene propylene fiber prepared by the melt spinning method is widely used in practical applications because of its excellent mechanical strength, heat resistance, chemical resistance, non-adhesion, hydrophobicity, low wear and electrical insulation. It has high reliability and economy. Background technique [0002] Polyperfluoroethylene propylene resin can be molded by melting processing method of general thermoplastic resin. Compared with polytetrafluoroethylene resin, polyperfluoroethylene propylene resin has much lower melt viscosity, good fluidity and good thermal stability. [0003] The fluorine atom content in the polyperfluoroethylene propylene fiber made from this material is relatively high, so the melting point, service temperature and limiting oxygen index...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/08D01D5/088D01D5/084D01D5/16D01D10/02D01D1/04D01D4/00
Inventor 杨彦昊刘华新彭为亚
Owner SHANGHAI PLASTICS RES INST CO LTD
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