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Title:
LONG-ACTING REUSABLE N90-LEVEL FACE MASK AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2021/212542
Kind Code:
A1
Abstract:
Disclosed are a long-acting reusable N90-level face mask and a preparation method therefor. The N90-level face mask comprises a face mask body (1), the face mask body (1) is composed of an inner layer (2) and an outer layer (3); the inner layer (2) is made of ultra-fine denier anhydrous drawn PP false-twist textured yarn that is 75D or above or below; and the outer layer (3) is a single-layer structure made from warp-weft interlacing and laminating, by means of a loom shuttle, single 6 or double 6 high-strength air textured yarn of nylon that is 160D or above or below, or polyester that is 75D or above or below and polypropylene false-twist textured yarn. The N90-level face mask can thoroughly solve the problem of the filtering efficiency of a disposable protective face mask/medical surgical face mask decreasing and same directly losing efficacy after being worn for four hours; and the face mask has a physical structure, a constant density, a long-acting and stable filtering effect, can be washed with water and is machine washable, can be sterilized by directly spraying alcohol thereon, can immediately reduce the consumption expenditure for disease prevention during a pandemic, saves on social costs, increases economic benefits, and reduces the burden of expenditure on enterprises and individuals.

Inventors:
WU NINGXI (CN)
LIU HUILIN (CN)
Application Number:
PCT/CN2020/088269
Publication Date:
October 28, 2021
Filing Date:
April 30, 2020
Export Citation:
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Assignee:
WU NINGXI (CN)
International Classes:
D03D11/00; A41D13/11; A41D31/02; D03D15/00
Domestic Patent References:
WO2004076726A12004-09-10
Foreign References:
CN2631542Y2004-08-11
CN206941089U2018-01-30
CN109171067A2019-01-11
CN205695857U2016-11-23
CN210234280U2020-04-03
CN202445176U2012-09-26
CN205180428U2016-04-27
Attorney, Agent or Firm:
BEIJING IP PATENT AGENCY CO., LTD. (CN)
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