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Title:
WASHABLE AND REUSABLE PROTECTIVE MASK AND MANUFACTURING PROCESS THEREOF
Document Type and Number:
WIPO Patent Application WO/2022/160401
Kind Code:
A1
Abstract:
A washable and reusable protective mask and a manufacturing process thereof, relating to the technical field of personal respiratory protection devices. A mask body of the mask comprises a surface layer (1), an inner layer (2), and a middle layer (3) arranged between the surface layer (2) and the inner layer (2); the middle layer (3) comprises a first middle layer (31), a second middle layer (32), and a third middle layer (33) which are sequentially stacked and ultrasonically compounded; the first middle layer (31) and the third middle layer (33) are both polypropylene spunbonded non-woven fabric layers; the second middle layer (32) is a spunlace electret treated polypropylene melt-blown fabric layer; the polypropylene melt-blown fabric layer is a polypropylene melt-blown fabric layer formed by processing of a polypropylene melt-blown material comprising 6-7wt.% of electret master batches, and the electret master batches comprise inorganic electret powder, organic electret powder, a compatilizer, a processing aid, and a polypropylene resin. The protective mask formed by the process has the advantages of PFE≥99% and BEF≥99%, the number of times of washing can be up to 20 times, and the filtering efficiency of the mask after washing can still realize the effects of PFE≥95% and BEF≥95%.

Inventors:
YE GANG (CN)
MEI XIANMING (CN)
Application Number:
PCT/CN2021/078076
Publication Date:
August 04, 2022
Filing Date:
February 26, 2021
Export Citation:
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Assignee:
TENGFEI TECH CO LTD (CN)
International Classes:
A41D13/11; A41D31/04; A41D31/30; D04H1/485; D04H1/492; D04H1/555
Attorney, Agent or Firm:
SUZHOU ZHOUZHI PATENT AGENCY (CN)
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