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Method for machining round-section polytetrafluoroethylene filament by virtue of cutting-hot melting shaping method

A technology of polytetrafluoroethylene and circular cross-section, which is applied in the direction of filament/wire forming, artificial filament heat treatment, single-component halogenated hydrocarbon artificial filament, etc., and can solve the problem of reducing the overall mechanical index and damage of filter bag materials, etc. problems, to achieve significant economic and social benefits

Active Publication Date: 2014-04-23
ZHEJIANG KERTICE HI TECH FLUOR MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When PTFE filaments are used as reinforcement materials for filter bags, due to the flat cross-section, a large amount of damage is caused during the processing of filter bag materials (generally by acupuncture and spunlace), thereby reducing the filter bag material. The overall mechanical index

Method used

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  • Method for machining round-section polytetrafluoroethylene filament by virtue of cutting-hot melting shaping method
  • Method for machining round-section polytetrafluoroethylene filament by virtue of cutting-hot melting shaping method
  • Method for machining round-section polytetrafluoroethylene filament by virtue of cutting-hot melting shaping method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Mixing: Mix the 216 polytetrafluoroethylene dispersion resin powder and liquid paraffin of Zhonghao Chenguang Chemical Research Institute according to the weight ratio of polytetrafluoroethylene dispersion resin powder to liquid paraffin as 1:0.2, and mix them evenly at 20°C Stand at high temperature for 144 hours, and then stand at 80°C for 10 hours, so that the polytetrafluoroethylene dispersion resin powder and liquid paraffin are fully mixed to form polytetrafluoroethylene materials;

[0029] (2) Compacting and calendering: the polytetrafluoroethylene material is pressed into a cylindrical blank on a compacting machine at 20°C, and the blank is extruded into a rod at a temperature of 40°C through a pusher, and then Calendered at 40°C by a calender to form a polytetrafluoroethylene base tape;

[0030] (3) Longitudinal stretching: the polytetrafluoroethylene base tape is stretched longitudinally in an oven at 180°C to obtain a degreased base tape;

[0031] (4) Cu...

Embodiment 2

[0034] (1) Mixing: Mix the F106 polytetrafluoroethylene dispersion resin powder and petroleum ether of Daikin Company in Japan according to the weight ratio of polytetrafluoroethylene dispersion resin powder to petroleum ether as 1:0.28, and mix them evenly at a temperature of 40°C. Stand for 96 hours, then stand at 40°C for 16 hours to fully mix the polytetrafluoroethylene dispersion resin powder and petroleum ether to form polytetrafluoroethylene materials;

[0035] (2) Compacting and calendering: the polytetrafluoroethylene material is pressed into a cylindrical blank on a compacting machine at 30°C, and the blank is extruded into a rod at a temperature of 60°C through a pusher, and then Calendered at 60°C by a calender to form a polytetrafluoroethylene base tape;

[0036] (3) Longitudinal stretching: the polytetrafluoroethylene base tape is stretched longitudinally in an oven at 300°C to obtain a degreased base tape;

[0037] (4) Cutting: using rows of blades to cut along...

Embodiment 3

[0040] (1) Mixing: Mix the 216 polytetrafluoroethylene dispersion resin powder and kerosene of Zhonghao Chenguang Chemical Research Institute according to the weight ratio of polytetrafluoroethylene dispersion resin powder to kerosene as 1:0.22, and mix them evenly at a temperature of 30°C Stand still for 100 hours, then stand still at a temperature of 60°C for 12 hours, so that the polytetrafluoroethylene dispersion resin powder and kerosene are fully mixed to form polytetrafluoroethylene materials;

[0041] (2) Compacting and calendering: the polytetrafluoroethylene material is pressed into a cylindrical blank on a compacting machine at 25° C., and the blank is extruded into a rod at a temperature of 50° C. by a pusher, and then Calendered at 50°C by a calender to form a polytetrafluoroethylene base tape;

[0042] (3) Longitudinal stretching: the polytetrafluoroethylene base tape is stretched longitudinally in an oven at 200°C to obtain a degreased base tape;

[0043] (4) C...

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Abstract

The invention discloses a method for machining a round-section polytetrafluoroethylene filament by virtue of a cutting-hot melting shaping method. The method comprises the following steps: mixing polytetrafluoroethylene dispersion resin powder with a liquid lubricant, and carrying out processes including material mixing, blank pressing, calendaring, longitudinal drawing, cutting, hot melting shaping and the like, thereby machining the polytetrafluoroethylene filament. The method is simple and is low in cost; the section of the prepared polytetrafluoroethylene filament is approximately round, the strength of the polytetrafluoroethylene filament is 4.3-3.2 cN / dtex, and the damage to the filament in acupuncture and spunlace machining processes can be greatly reduced; the filament can be widely applied to high-temperature tail gas treatment in waste incineration treatment plants, coal-fired power plants, industries of cement and the like and has remarkable economic and social benefits.

Description

technical field [0001] The invention relates to a method for preparing polytetrafluoroethylene fibers, in particular to a method for processing polytetrafluoroethylene filaments with circular cross-sections by cutting and melting. Background technique [0002] At present, air pollution has become an increasingly serious global problem. The emission and control of high-temperature smoke, dioxins, furans, nitrogen oxides, sulfides and other waste gases have received attention from all over the world. High-temperature smoke and dust emissions from industrial fields such as coal-fired power generation, metallurgy, cement, and waste incineration have increased the pressure on environmental protection. In the dust removal technology, the bag filter is gradually occupying the market with its high dust removal efficiency. The core component of the bag filter is the filter bag, and the core of the filter bag is the fiber material. Among high-temperature-resistant fiber materials in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/48D01F1/10D01D5/42D01D10/02
Inventor 郭玉海徐志梁罗文春王峰朱海霖唐红艳姜学梁陈美玉张华鹏来侃
Owner ZHEJIANG KERTICE HI TECH FLUOR MATERIAL
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