The film laminating technology and properties of PTFE composite filter materials

doi:10.19398/j.att.202012006

Abstract

Abstract:

In order to explore the preparation process and properties of polytetrafluoroe-thylene (PTFE) composite filter materials, by taking different types of PTFE membranes as the main raw materials, and non-woven fabrics as the substrate, PTFE composite filter materials are prepared with different film laminating methods. The effect of the types of PTFE membrane and film laminating methods on the properties of PTFE/non-woven composite filter materials, as well as difference between the properties of melt-blown cloth and PTFE/non-woven composite filter materials are studied. The results indicate that the PTFE/non-woven composite filter material prepared with PTFE-A membrane as the raw material has lower ventilation resistance than heat-cladded material and the filtration efficiency is up to reach 99%. The filtration efficiency and ventilation resistance of this material can satisfy the standard requirements for masks.

Key words: polytetrafluoroethylene (PTFE) membrane, melt-blown cloth, composite filter material, film laminating, filter properties

摘要：

为了探索聚四氟乙烯(PTFE)复合过滤材料的制备工艺及性能,以不同种类PTFE膜为主要原料,无纺布作为基材,采用不同的覆膜方式制备PTFE复合过滤材料。研究PTFE膜的种类、覆膜方式对PTFE/无纺布复合过滤材料性能的影响,以及熔喷布与PTFE/无纺布复合过滤材料两者性能之间的不同。结果表明:以PTFE-A膜为原料,采用胶覆方式所制备的PTFE/无纺布复合过滤材料的通气阻力要比热覆的低,且过滤效率能达到99%,该材料的过滤效率和通气阻力能符合口罩标准要求。

关键词: 聚四氟乙烯(PTFE)膜, 熔喷布, 复合过滤材料, 覆膜工艺, 过滤性能

CLC Number:

TS174

NIE Sunjian, LIANG Yan, ZHOU Guanchen, YANG Dong. The film laminating technology and properties of PTFE composite filter materials[J]. Advanced Textile Technology, 2022, 30(2): 85-92.

聂孙建, 梁燕, 周冠辰, 杨东. 聚四氟乙烯复合过滤材料的覆膜工艺及其性能[J]. 现代纺织技术, 2022, 30(2): 85-92.

Figures/Tables 10

种类	通气阻力/Pa	透气率/(mm·s^-1)	厚度/μm
PTFE-A	30.9	183.4	1.0
PTFE-B	27.1	237.5	2.0
PTFE-C	29.7	216.4	2.0
PTFE-D	23.3	300.0	1.5

Fig.1 Pore size distribution of different types of PTFE membranes

Fig.2 Filtration efficiency of filter materials prepared by four types of PTFE membranes

Fig.3 Ventilation resistance of filter materials prepared by four types of PTFE membranes

Fig.4 Ventilation resistance of different coating methods

Fig.5 SEM image of base non-woven fabric obtained by thermal cladding method

Fig.6 Filtration efficiency of different coating methods

Fig.7 Filter efficiency of different filter materials

Fig.8 Pore size distribution of different filter materials

Fig.9 The relationship between filtration efficiency and time

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