Production process and device of expanded polytetrafluoroethylene board

A technology of polytetrafluoroethylene board and polytetrafluoroethylene, which is applied in the direction of layered products, lamination devices, lamination, etc., can solve the problems that cannot meet the needs of large industrial environments and weak capabilities, and achieve creep resistance and Anti-cold flow characteristics, long service life, easy to cut effect

Inactive Publication Date: 2014-09-03
NINGBO FUNASI FLUORINE MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, at present, the domestic production capacity in the field of pure expanded polytetrafluoroethylene board is still very weak. The needs of a large industrial environment

Method used

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  • Production process and device of expanded polytetrafluoroethylene board
  • Production process and device of expanded polytetrafluoroethylene board
  • Production process and device of expanded polytetrafluoroethylene board

Examples

Experimental program
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Embodiment

[0107] 1) First put the polytetrafluoroethylene dispersed resin into the refrigerator for refrigeration. Preferably, the temperature of refrigeration is below 18°C, and the refrigeration time is more than 12 hours, and then sieved. It should be noted here that the sieve Separation must be performed at the same temperature;

[0108] 2) Weigh the screened polytetrafluoroethylene dispersed resin and pour it into the automatic mixing machine 1. The automatic mixing machine 1 includes a mixing frame 11, a mixing tank 12 and a gas-liquid spraying device 13. Bucket 12 is rotatably erected on the material mixing frame 11 by guide roller 121, as preferably, mixing material tank 12 is double-conical and is made of stainless steel tube, and is provided with inlet and outlet 122 on mixing material tank 12, will The screened polytetrafluoroethylene dispersed resin is poured into the mixing tank 12 from the inlet and outlet 122, and then a certain proportion of auxiliary agent is injected i...

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Abstract

The invention discloses a production process and device of an expanded polytetrafluoroethylene board. According to the technical scheme, the production process is characterized by comprising the following steps: screening refrigerated polytetrafluoroethylene dispersion resin, adding additives according to a ratio, ripening the mixed raw materials to obtain a blank, extruding the blank to form a rod material, rolling the rod material through a two-roller shaft to form a flaky film, degreasing, drying and stretching the flaky film, longitudinal and transversely drawing the flaky film, laminating the flaky film which is drawn in two directions, pressing the flaky film to obtain a sheet, and finally trimming the sheet to obtain the board. The production process of the expanded polytetrafluoroethylene board breaks through a traditional board production process, the problems of creeping and cold flow of an ordinary board can be solved, the compression resistance, the creeping loosening rate, the compression rate, the resilience property and the like of the expanded polytetrafluoroethylene board are obviously improved, and the expanded polytetrafluoroethylene board can be widely used for sealing aerospace, medical, food and petroleum pipelines and the like and has extremely good application temperature, an anti-aging property, no toxicity, no pollution and the like.

Description

technical field [0001] The invention relates to the production field of a polytetrafluoroethylene product, in particular to a production process and production equipment of an expanded polytetrafluoroethylene board. Background technique [0002] Polytetrafluoroethylene is a polymer compound containing fluorine atoms in the main chain of the molecule. The F atoms in the PTFE molecule cover the C-C bond and the C-F bond has high energy and is particularly stable. It is not affected by alkali metals and fluorine elements. Any chemical erosion; the F atom in the PTFE molecule is symmetrical, the two elements in C-F are covalently combined, there are no free electrons in the molecule, and the entire molecule is neutral, so that PTFE has excellent dielectric properties; It has an inert fluorine-containing shell, which gives it outstanding non-stick properties and a low coefficient of friction. [0003] PTFE has outstanding excellent comprehensive properties, high temperature resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C69/02B29C55/14B29C43/24B29C43/58B29B13/04B29B11/00B32B37/00B29K27/18
Inventor 孙启渭张国敏芦丰年
Owner NINGBO FUNASI FLUORINE MATERIAL TECH
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