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A kind of preparation method of polytetrafluoroethylene covering film for face mask

A polytetrafluoroethylene and mask technology, applied in the field of polytetrafluoroethylene stretch film, can solve the problems of interface leakage, poor adhesion of the substrate layer, affecting the filtering effect, etc., and achieve good substrate adhesion and filtering efficiency. The effect of high and high filtering precision

Active Publication Date: 2022-04-29
浙江赛迅环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it improves the mechanical properties of the PTFE microporous membrane, due to the non-stickiness of the PTFE resin, it is not tightly bonded to the substrate layer, resulting in leakage between the interfaces, which ultimately affects the filtration effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] A preparation method for a polytetrafluoroethylene coating for a mouth mask, comprising the following steps:

[0062] a. Take polytetrafluoroethylene dispersed resin micropowder and short-chain paraffin oil according to the mass ratio of 1:0.2, and mix the taken raw materials at high speed in a three-dimensional mixer;

[0063] b. After mixing, mature at 40°C for 24 hours in a closed environment;

[0064] C, carry out sieving process with 200 mesh sieves with the raw material after ripening, obtain sieve material and sieve residue, and sieve material is standby as the first raw material;

[0065] d. Collect the sieved material and dry it to obtain the secondary treatment material, then take the secondary treatment material and short-chain paraffin oil according to the mass ratio of 1:0.2, and put the taken raw material in a three-dimensional mixer at high speed Mixing; after mixing, aging at 40°C for 5 hours in a closed environment to obtain the second raw material, wh...

Embodiment 2

[0099] A preparation method for a polytetrafluoroethylene coating for a mouth mask, comprising the following steps:

[0100] a, polytetrafluoroethylene dispersed resin micropowder and short-chain paraffin oil are taken according to the mass ratio of 1:0.25, and the taken raw materials are mixed at a high speed in a three-dimensional mixer;

[0101] b. After mixing, mature at 45°C for 18 hours in a closed environment;

[0102] C, carry out sieving process with 150 mesh sieves with the raw material after ripening, obtain sieve material and sieve leftover material, sieve material is standby as the first raw material;

[0103] d. Collect the sieved material and dry it to obtain the secondary treatment material, then take the secondary treatment material and short-chain paraffin oil according to the mass ratio of 1:0.25, and put the taken raw material in a three-dimensional mixer at high speed Mixing; after mixing, aging at 45°C for 2.5 hours in a closed environment to obtain the ...

Embodiment 3

[0137] A preparation method for a polytetrafluoroethylene coating for a mouth mask, comprising the following steps:

[0138] a. Take polytetrafluoroethylene dispersed resin micropowder and short-chain paraffin oil according to the mass ratio of 1:0.3, and mix the taken raw materials at high speed in a three-dimensional mixer;

[0139] b. After mixing, mature at 60°C for 12 hours in a closed environment;

[0140] C, carry out sieving process with 100 mesh sieves with the raw material after ripening, obtain sieve material and sieve residue, and sieve material is standby as the first raw material;

[0141] d. Collect the sieved material and dry it to obtain the secondary treatment material, then take the secondary treatment material and short-chain paraffin oil according to the mass ratio of 1:0.3, and put the taken raw material in a three-dimensional mixer at high speed Mixing; after mixing, aging at 60°C for 2 hours in a closed environment to obtain the second raw material, wh...

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Abstract

The invention relates to a preparation method of a polytetrafluoroethylene film for a mask. The invention belongs to the technical field of polytetrafluoroethylene stretch film. The method comprises the following steps: mixing polytetrafluoroethylene dispersed resin micropowder with short-chain paraffin oil, aging, sieving, and obtaining the first raw material and sieved material; using the sieved material to prepare the second raw material; respectively making the first blank and the second blank; making the first rod and the second rod respectively; making the first raw material belt and the second raw material belt respectively; making a composite raw material belt; making a pre-stretched film; transverse stretching The transverse stretching film is obtained; the longitudinal stretching is carried out at the same time as heat setting to obtain a biaxial stretching film; the biaxial stretching film and the non-woven fabric are pressed and pasted to form a polytetrafluoroethylene film for a mask. The present invention uses the first raw material and the second raw material to prepare raw material belts with different properties, and then hot-presses and composites them to prepare a film through a biaxial stretching process. Compared with the existing film, the film has better substrate adhesion , and has the advantages of high filtration precision and high filtration efficiency.

Description

technical field [0001] The invention relates to a method for a film for a mask, in particular to a method for preparing a polytetrafluoroethylene film for a mask. The invention belongs to the technical field of polytetrafluoroethylene stretch film. Background technique [0002] In the prior art, the films for masks are mostly melt blown cloth made of polypropylene material. Although polypropylene material is cheap and easy to obtain, the cost of meltblown equipment is high, so the price of meltblown cloth has been maintained at a certain level. Especially in the past six months, affected by the epidemic, the price of melt blown cloth has remained high, far exceeding its value. In this case, the polytetrafluoroethylene film with more excellent performance has become the preferred film for masks. [0003] Compared with meltblown cloth, PTFE film has the following advantages: [0004] 1. The fiber diameter of polypropylene meltblown cloth is 1~5μm, while the fiber diameter ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/36B01D67/00B01D46/54
CPCB01D71/36B01D67/0002B01D46/543
Inventor 徐志梁徐掌平罗文春施亦斐
Owner 浙江赛迅环保科技有限公司