Preparation method of polytetrafluoroethylene ultrafine short fibers

A technology of polytetrafluoroethylene and fine short fibers, which is applied in short fiber formation, fiber treatment, filament/thread forming, etc., and can solve the problems of unstable production quality of PTFE ultrafine short fibers, thick monofilaments, and difficulty in carding , to achieve the effect of smooth surface, stable performance and good mechanical properties

Active Publication Date: 2022-08-02
SHANDONG SENRONG PLASTIC IND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of preparing polytetrafluoroethylene ultrafine short fibers, there are thick monofilaments and difficult carding, which leads to unstable production quality of PTFE ultrafine short fibers. Therefore, a new type of polytetrafluoroethylene ultrafine short fibers is urgently needed preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The preparation method of the polytetrafluoroethylene ultrafine short fiber described in the present embodiment 1, consists of the following steps:

[0038] (1) mixing PTFE dispersion resin particles, booster and surfactant at a low temperature, pre-pressing after curing in a high-temperature environment, and pre-pressing into a cylindrical blank;

[0039] (2) put the blank into the extruder to obtain the extruded strip, and then enter the calender to be calendered to obtain the oil-containing base belt;

[0040] (3) putting the oil-containing base tape into the degreasing machine for degreasing to obtain the degreasing base tape;

[0041] (4) Put the degreasing base tape on the unwinding platform of the carding machine, sinter and shape while longitudinally stretching, the obtained PTFE film is broken through the net, so that the PTFE film presents a uniform grid state, and then sent to the carding device, through the needle The cloth is combed into wire bundles in a ...

Embodiment 2

[0061] The preparation method of the polytetrafluoroethylene ultrafine short fiber described in this embodiment 2, is made up of the following steps:

[0062] (1) mixing PTFE dispersion resin particles, booster and surfactant at a low temperature, pre-pressing after curing in a high-temperature environment, and pre-pressing into a cylindrical blank;

[0063] (2) put the blank into the extruder to obtain the extruded strip, and then enter the calender to be calendered to obtain the oil-containing base belt;

[0064] (3) putting the oil-containing base tape into the degreasing machine for degreasing to obtain the degreasing base tape;

[0065] (4) Put the degreasing base tape on the unwinding platform of the carding machine, sinter and shape while longitudinally stretching, the obtained PTFE film is broken through the net, so that the PTFE film presents a uniform grid state, and then sent to the carding device, through the needle The cloth is combed into wire bundles in a finer...

Embodiment 3

[0085] The preparation method of the polytetrafluoroethylene ultrafine short fiber described in the present embodiment 3, consists of the following steps:

[0086] (1) mixing PTFE dispersion resin particles, booster and surfactant at a low temperature, pre-pressing after curing in a high-temperature environment, and pre-pressing into a cylindrical blank;

[0087] (2) put the blank into the extruder to obtain the extruded strip, and then enter the calender to be calendered to obtain the oil-containing base belt;

[0088] (3) putting the oil-containing base tape into the degreasing machine for degreasing to obtain the degreasing base tape;

[0089] (4) Put the degreasing base tape on the unwinding platform of the carding machine, sinter and shape while longitudinally stretching, the obtained PTFE film is broken through the net, so that the PTFE film presents a uniform grid state, and then sent to the carding device, through the needle The cloth is combed into wire bundles in a ...

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Abstract

The invention belongs to the technical field of preparation of polytetrafluoroethylene short fibers, in particular to a preparation method of polytetrafluoroethylene ultrafine short fibers. Mix PTFE dispersed resin particles, booster and surfactant at low temperature, and pre-press after curing in high temperature environment to obtain a blank; the blank is extruded and calendered to obtain an oil-containing base belt; the oil-containing base belt is degreased and then sintered and shaped at the same time Longitudinal stretching, the obtained PTFE film is broken through the mesh, so that the PTFE film is in a grid state, and then sent to the carding device, and is combed into a wire bundle with a finer grid state through the card cloth. Cut and open to prepare PTFE short fibers. The preparation method of the polytetrafluoroethylene ultrafine short fiber of the invention has the advantages of simple preparation process, easy realization of industrial production, stable performance of the prepared PTFE short fiber, high yield, good mechanical properties and temperature resistance, Wide range of applications.

Description

technical field [0001] The invention belongs to the technical field of preparation of polytetrafluoroethylene short fibers, in particular to a preparation method of polytetrafluoroethylene ultrafine short fibers. Background technique [0002] Polytetrafluoroethylene, commonly known as "Plastic King", is a polymer compound formed by polymerization of tetrafluoroethylene. It has excellent chemical stability, corrosion resistance, sealing, high lubrication and non-stickiness, electrical insulation and good. Anti-aging endurance, can be used as engineering plastics; fiber filling can effectively improve the strength and stiffness of plastics, reinforced plastics are rigid structural materials. [0003] At present, there are two methods for producing PTFE short fibers. The first is the melt spinning method. Due to the extremely poor fluidity of PTFE in the molten state, the short fibers cannot be produced by the usual melt spinning method. Instead, a special method is adopted, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/42D01D5/26B29B7/82B29C43/24B29C48/25B29C48/285B29C48/92B29C69/02
CPCD01D5/423D01D5/26B29C48/288B29C48/25B29C48/92B29B7/823B29C43/24B29C69/02
Inventor 庞同峰
Owner SHANDONG SENRONG PLASTIC IND TECH
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