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Manufacturing process of high-strength polytetrafluoroethylene film

A polytetrafluoroethylene and manufacturing process technology, applied in the field of manufacturing process of high-strength polytetrafluoroethylene film, can solve the problem that the strength of polytetrafluoroethylene film is relatively high, and the strength of polytetrafluoroethylene film cannot meet the application requirements, etc. problem, to achieve the effect of excellent dielectric properties and high voltage resistance

Inactive Publication Date: 2019-01-15
SHANDONG DONGYUE POLYMER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in some special application fields, the strength requirements of PTFE films are relatively high, and the strength of existing PTFE films cannot meet the application requirements.

Method used

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  • Manufacturing process of high-strength polytetrafluoroethylene film
  • Manufacturing process of high-strength polytetrafluoroethylene film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Raw material sieving: sieve polytetrafluoroethylene suspension resin DF-19A through a 10-purpose sieve for subsequent use;

[0029] (2) Molding: Raise the sieved polytetrafluoroethylene suspension resin DF-19A to 25MPa at a rate of 15mm / min, hold the pressure for 15min, and take it out for use;

[0030] (3) Sintering: put the molded product obtained in step (2) into a sintering furnace, raise it from room temperature to 290°C at a rate of 3°C / min, keep it at 290°C for 10 minutes, and increase it from 290°C at a rate of 1°C / min Raise to 380°C, hold at 380°C for 8 hours, then cool down from 380°C to 290°C at a rate of 1°C / min, and cool down naturally from 290°C to room temperature, then take it out for use;

[0031] (4) turning: the sintered product obtained in (3) is turned on a lathe, and the turning film thickness is 0.5mm;

[0032] (5) Melt stretching: the turning film obtained in (4) is stretched in a stretching device, the stretching temperature is 380°C, the s...

Embodiment 2

[0034] (1) Raw material sieving: sieve polytetrafluoroethylene suspension resin DF-19A through a 10-purpose sieve for subsequent use;

[0035] (2) Molding: Raise the sieved polytetrafluoroethylene suspension resin DF-19A to 30MPa at a rate of 20mm / min, hold the pressure for 10min, and take it out for later use;

[0036] (3) Sintering: put the molded product obtained in step (2) into a sintering furnace, raise it from room temperature to 290°C at a rate of 3°C / min, keep it at 290°C for 10 minutes, and increase it from 290°C at a rate of 1°C / min Raise to 380°C, hold at 380°C for 8 hours, then cool down from 380°C to 290°C at a rate of 1°C / min, and cool down naturally from 290°C to room temperature, then take it out for use;

[0037] (4) turning: the sintered product obtained in (3) is turned on a lathe, and the turning film thickness is 0.5mm;

[0038] (5) Melt stretching: the turning film obtained in (4) is stretched in a stretching device, the stretching temperature is 380°C,...

Embodiment 3

[0040] (1) Raw material sieving: sieve polytetrafluoroethylene suspension resin DF-19A through a 10-purpose sieve for subsequent use;

[0041] (2) Molding: Raise the sieved polytetrafluoroethylene suspension resin DF-19A to 20MPa at a rate of 15mm / min, hold the pressure for 15min, and take it out for later use;

[0042] (3) Sintering: put the molded product obtained in step (2) into a sintering furnace, raise it from room temperature to 290°C at a rate of 3°C / min, keep it at 290°C for 10 minutes, and increase it from 290°C at a rate of 1°C / min Raise to 380°C, hold at 380°C for 8 hours, then cool down from 380°C to 290°C at a rate of 1°C / min, and cool down naturally from 290°C to room temperature, then take it out for use;

[0043] (4) turning: the sintered product obtained in (3) is turned on a lathe, and the turning film thickness is 0.5mm;

[0044] (5) Melt stretching: the turning film obtained in (4) is stretched in a stretching device, the stretching temperature is 380°C,...

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Abstract

The invention belongs to the technical field of processing and manufacturing of polytetrafluoroethylene films, and particularly relates to a manufacturing process of a high-strength polytetrafluoroethylene film. The manufacturing process of the high-strength polytetrafluoroethylene film comprises the following steps of (1) sieving of raw materials, (2) compression molding, (3) sintering, (4) turning and (5) melting and stretching. The tensile strength of the high-strength polytetrafluoroethylene film prepared by the manufacturing process is more than 60 MPa, the haze is 30-100, and the densityis 2.100-2.200 g / cm<3>. The high-strength polytetrafluoroethylene film prepared by the manufacturing process has higher tensile strength and voltage resistance, excellent dielectric property, high temperature resistance, abrasion resistance, weather resistance and the like, can be used for manufacturing high-grade insulating cells, sheaths and insulating materials of capacitors and transformers in the electromechanical and electronic industries, and can completely meet market requirements for the high-strength polytetrafluoroethylene film.

Description

technical field [0001] The invention belongs to the technical field of processing and manufacturing polytetrafluoroethylene films, and in particular relates to a manufacturing process of high-strength polytetrafluoroethylene films. Background technique [0002] Polytetrafluoroethylene is known as the "King of Plastics". It has excellent comprehensive properties such as high temperature resistance, corrosion resistance, non-stickiness, self-lubrication, excellent dielectric properties, and low friction coefficient. It is used in national defense, aerospace, Chemical industry, electronics, electrical, machinery, construction, medical, household goods and other fields. [0003] PTFE film is divided into two types, one is raw material tape film and biaxially stretched film processed from PTFE dispersed resin, raw material tape is used for sealing industry, and biaxially stretched film is used for filtration, Clothing and other industries; the other is a turning film made of pol...

Claims

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Application Information

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IPC IPC(8): B29D7/01B29K27/18
CPCB29D7/01B29K2027/18
Inventor 陈越韩桂芳付师庆刘长海周鹏飞
Owner SHANDONG DONGYUE POLYMER MATERIAL
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