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A reusable polytetrafluoroethylene microporous film composite mask material, preparation method and mask made therefrom

A technology of polytetrafluoroethylene and microporous film, which is applied in the direction of chemical instruments and methods, applications, household appliances, etc., and can solve the problems of easy deformation of polytetrafluoroethylene microporous film, decreased filtering effect of masks, and increased gas permeation resistance, etc. problems, to achieve the effect of enhanced wear resistance, low processing cost, and low equipment requirements

Active Publication Date: 2022-04-12
湖州禾海材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PTFE microporous membranes are easily deformed and need to be bonded to the support material
However, the adhesive will block the micropores and increase the gas penetration resistance.
In addition, the PTFE microporous film is easy to wear, resulting in a change in the pore size, resulting in a decrease in the filtering effect of the mask.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of a reusable polytetrafluoroethylene microporous film composite mask material comprises the steps:

[0024] 1. Adhesive spray: Use a spray gun to atomize and spray commercially available acrylic adhesive with a solid content of 40% on both sides of a polytetrafluoroethylene microporous film with a pore size of 0.1 micron and a gas transmission resistance of 90Pa. The liquid adhesive on both sides The weight is controlled at 3 grams per square meter to obtain a glue-sprayed wet film;

[0025] 2. Drying treatment: The sprayed glue wet film is dried in two stages, heated in an oven at 100°C for 0.5 minutes to dry, and heated in an oven at 120°C for 3 minutes to melt the liquid adhesive to obtain a sprayed glue dry film ;

[0026] 3. Cold-rolled lamination: Unwind the polypropylene spunbonded nonwoven fabric with a gram weight of 15 g / m2, and enter the rolling car composed of metal rollers and rubber rollers with the sprayed glue dry film. The polypro...

Embodiment 2

[0029] A preparation method of a reusable polytetrafluoroethylene microporous film composite mask material comprises the steps:

[0030] 1. Adhesive spray: Use a spray gun to atomize and spray commercially available acrylic adhesive with a solid content of 20% on both sides of the PTFE microporous film with a pore size of 2 microns and a gas transmission resistance of 30 Pa. The weight of the liquid adhesive on both sides Control at 15 g / square meter to obtain glue spray wet film;

[0031] 2. Drying treatment: The sprayed glue wet film is dried in two stages, heated in an oven at 105°C for 3 minutes to dry, and heated in an oven at 160°C for 0.5 minutes to melt the liquid adhesive to obtain a sprayed glue dry film ;

[0032] 3. Cold-rolled lamination: Unroll the polypropylene spunbonded nonwoven fabric with a gram weight of 30 g / m2, and enter the rolling car composed of metal rollers and rubber rollers with the sprayed glue dry film. The polypropylene spunbonded nonwoven fabr...

Embodiment 3

[0035] A preparation method of a reusable polytetrafluoroethylene microporous film composite mask material comprises the steps:

[0036] 1. Adhesive spray: Use a spray gun to atomize and spray commercially available acrylic adhesive with a solid content of 30% on both sides of the PTFE microporous film with a pore size of 0.5 microns and a gas transmission resistance of 50 Pa. The liquid adhesive on both sides The weight is controlled at 8 grams per square meter to obtain a glue-sprayed wet film;

[0037] 2. Drying treatment: The sprayed glue wet film is dried in two stages, heated in an oven at 102°C for 1 minute to dry, and heated in an oven at 130°C for 1 minute to melt the liquid adhesive to obtain a sprayed glue dry film ;

[0038] 3. Cold-rolled lamination: unwind the polypropylene spunbonded nonwoven fabric with a gram weight of 20 g / m2, and enter the padding car composed of metal rollers and rubber rollers with the sprayed glue dry film. The polypropylene spunbonded n...

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Abstract

The invention belongs to the technical field of filter materials, and specifically provides a reusable polytetrafluoroethylene microporous film composite mask material, a preparation method of the material and a prepared mask thereof, and the preparation method comprises the following steps: a. Mixture spray: the liquid adhesive is atomized and sprayed on both sides of the polytetrafluoroethylene microporous film, and the weight of the liquid adhesive on both sides is controlled at 3-15 grams / square meter to obtain a spray glue wet film; b, drying Drying treatment: after two stages of drying, the glue spray dry film is obtained; c, cold-rolled composite: the polypropylene spunbonded non-woven fabric is cold-rolled and compounded with the glue spray dry film to obtain a composite film; d, lamination: the The composite film is bonded with the fabric to form a reusable polytetrafluoroethylene microporous film composite mask material. In the above technical scheme, it not only reduces the clogging of the pores of the polytetrafluoroethylene film by the adhesive, but also enhances the wear resistance of the film. use.

Description

technical field [0001] The invention belongs to the technical field of filter materials, and specifically provides a reusable polytetrafluoroethylene microporous film composite mask material, a preparation method of the material and the prepared mask. Background technique [0002] Most of the current masks are disposable, and the main filtering function is polypropylene melt-blown nonwoven fabric, and electret technology is generally used to improve filtration efficiency. However, there are certain defects in the electret technology. For example, after encountering water, the electret will attenuate to a certain extent. During the storage of the mask, the electret slowly disappears. These defects all cause the reduction of mask filtering efficiency. In addition, this mask cannot be used after disinfection. [0003] PTFE microporous film is formed by biaxial stretching technology, and films with different pore diameters can be processed through film-making parameters. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/02B32B27/32B32B27/36B32B3/24B32B7/12B32B27/08B32B27/30B32B33/00B32B37/08B32B37/12B32B38/16A41D13/11
CPCB32B5/022B32B7/12B32B27/08B32B3/266B32B27/304B32B33/00B32B37/1207B32B38/164B32B37/08A41D13/11B32B2262/0253B32B2262/0284B32B2307/554B32B2555/00
Inventor 郭玉海胡晓环缑慧康郭煜鑫
Owner 湖州禾海材料科技有限公司