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Method for preparing PTFE film material for air degerming

A technology of polytetrafluoroethylene and film material, applied in the direction of deodorization, disinfection, etc., can solve problems such as difficult preparation, and achieve significant economic and social benefits, simple preparation process, and low cost.

Inactive Publication Date: 2006-05-24
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pore size of the microporous film used for air sterilization needs to be less than 0.2 microns, which is difficult to prepare by the above method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1. Mixing materials: mix polytetrafluoroethylene resin powder (F106 of Daikin Corporation of Japan) and liquid paraffin in a weight ratio of 1:0.2, let stand at a temperature of 20°C for 144 hours, then stand at a temperature of 40°C Leave it for 10 hours to fully mix the resin powder with the liquid lubricant to form a polytetrafluoroethylene material;

[0018] 2. Compacting and calendering: press the polytetrafluoroethylene material on a compacting machine at 20°C to form a cylindrical blank, extrude the blank into a rod at a temperature of 40°C through a pusher, and then calender The machine is calendered at 40°C to form a PTFE base tape;

[0019] 3. Longitudinal stretching: longitudinally stretch the two overlapping layers of the polytetrafluoroethylene base tape in an oven at 180°C containing water vapor to obtain a degreased base tape bonded together;

[0020] 4. Transverse stretching and heat setting: Stretch the degreased base tape transversely at 80°C, and the...

Embodiment 2

[0024] 1. Mixing materials: mix polytetrafluoroethylene resin powder (F106 of Daikin Company of Japan) and petroleum ether according to a weight ratio of 1:0.25, let stand at a temperature of 30°C for 121 hours, and then stand at a temperature of 60°C Set aside for 12 hours to fully mix the resin powder and liquid lubricant to form a polytetrafluoroethylene material;

[0025] 2. Compacting and calendering: press the polytetrafluoroethylene material on a compacting machine at 25°C to form a cylindrical blank, and extrude the blank into a rod at a temperature of 50°C through a pusher, and then calender The machine is calendered at 50°C to form a PTFE base tape;

[0026] 3. Longitudinal stretching: longitudinally stretch the two overlapping layers of the polytetrafluoroethylene base tape in an oven at 250°C containing water vapor to obtain a bonded degreased base tape;

[0027] 4. Transverse stretching and heat setting: Stretch the degreased base tape transversely at 120°C, and ...

Embodiment 3

[0031] 1. Mixing materials: mix polytetrafluoroethylene resin powder (CD123 of Japan Asahi Glass Co., Ltd.) and kerosene according to the weight ratio of 1:0.28, let stand at a temperature of 40°C for 144 hours, then stand at a temperature of 80°C for 16 Hours, the resin powder is fully mixed with the liquid lubricant to form a polytetrafluoroethylene material;

[0032] 2. Compacting and calendering: press the polytetrafluoroethylene material on a compacting machine at 30°C to form a cylindrical blank, and extrude the blank into a rod at a temperature of 60°C through a pusher, and then calender The machine is calendered at 60°C to form a PTFE base tape;

[0033] 3. Longitudinal stretching: longitudinally stretch the two overlapping layers of the polytetrafluoroethylene base tape in a 300°C oven containing water vapor to obtain a bonded degreased base tape;

[0034] 4. Transverse stretching and heat setting: Stretch the degreased base tape transversely at 170°C, and then sinte...

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Abstract

The invention discloses a method to manufacture polytetrafluoroethylene film material used for air degerming. The invention mixes polytetrafluoroethylene resin powder and liquid lubricant, and is gained after extruding, rolling, longitudinal stretching, lateral stretching and hot shaping. It is simple technology and low cost. It could be used for air degerming and has great social and economic benefits.

Description

technical field [0001] The invention relates to a preparation method of a polytetrafluoroethylene film material, in particular to a preparation method of a polytetrafluoroethylene film material for air sterilization. Background technique [0002] Traditional biaxially oriented PTFE films are prepared by the following methods: [0003] PTFE micropowder + lubricant → mixing → sieving → ripening → green compact → pushing → calendering (preparation of base tape) → longitudinal stretching (preparation of degreased base tape) → transverse stretching → curing → finished PTFE film [0004] The thickness of the film processed by the above traditional process is 5-50 microns, the pore size is 0.3-5 microns, there are about 9 billion micropores per square inch, and the opening rate is as high as 80%. It is widely used as waterproof and moisture-permeable clothing fabric. However, the pore size of the microporous film used for air sterilization needs to be less than 0.2 micron, which i...

Claims

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Application Information

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IPC IPC(8): C08L27/18A61L9/00B29C55/18C08J5/18
Inventor 郭玉海张华鹏张建春陈建勇郝新敏冯新星
Owner ZHEJIANG SCI-TECH UNIV
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