Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (03): 168-174.doi: 10.13475/j.fzxb.20200200507

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Preparation technology and research status of nonwoven filtration materials for individual protective masks

ZHANG Xing1, LIU Jinxin1, ZHANG Haifeng2, WANG Yuxiao1, JIN Xiangyu1()   

  1. 1. Engineering Research Center of Technical Textiles,Ministry of Education,Donghua University,Shanghai 201620,China
    2. School of Textile and Clothing,Nantong University,Nantong,Jiangsu 226019,China
  • Received:2020-02-03 Revised:2020-03-01 Online:2020-03-15 Published:2020-03-27
  • Contact: JIN Xiangyu E-mail:jinxy@dhu.edu.cn

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Abstract:

In order to gain a deeper understanding of the current research status of the nonwoven filtration materials for protective masks, this paper introduced the application foundation and processing technologies of several nonwoven filtration materials, including spunbond nonwovens, needle punched nonwovens and melt blown nonwovens. The mechanisms and performances of corona charging, hydro charging and air charging were introduced. In particular, three types of nonwoven filtration materials mentioned above were elaborated together with the latest global research progress of electret technology. The influence of polymer modification technology and electret treatment technology on filtration performance of the nonwoven materials were further analyzed respectively. The review indicates that polymer modification technology, high-speed preparation technology of new materials and electret treatment technology are regarded as the research directions of nonwoven filtration materials for protective masks and its preparation technology in the future, and the evaluation standard system should be improved accordingly.

Key words: protective mask, nonwoven technology, filtration material, electret technology, polymer modification technology, medical textiles

CLC Number: 

  • TS176

Fig.1

Schematic of preparation of spunbond nonwovenfiltration materials with a double die head"

Fig.2

SEM images of polypropylene calender point-bonding nonwoven filtration material. (a) Surface morphology; (b) Cross section morphology"

Fig.3

SEM images of polyethylene/polypropylene nonwoven filtration materials fabricated via air bonding. (a) Surface morphology;(b) Cross section morphology"

Fig.4

KN95 mask with arched structure"

Fig.5

Schematic of preparation of needle punched nonwoven filtration materials"

Fig.6

Schematic of preparation of melt blown nonwoven filtration materials"

Fig.7

Mechanism of corona charging"

Fig.8

Blue-colored glow phenomenon at different voltage"

Fig.9

Mechanism of hydro charging"

Fig.10

Mechanism of hot air charging"

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