聚四氟乙烯复合过滤材料的覆膜工艺及其性能

doi:10.19398/j.att.202012006

摘要/Abstract

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

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

中图分类号:

TS174

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.

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.

图/表 10

表1 不同类型PTFE膜的透气性、通气阻力及厚度

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

图1 不同类型的PTFE膜的孔径分布

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

图2 四种类型的PTFE膜制备的过滤材料的过滤效率

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

图3 四种类型的PTFE膜制备的过滤材料的通气阻力

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

图4 不同覆膜方式的通气阻力

Fig.4 Ventilation resistance of different coating methods

图5 热覆方式所得基材无纺布的SEM图

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

图6 不同覆膜方式的过滤效率

Fig.6 Filtration efficiency of different coating methods

图7 不同过滤材料的过滤效率

Fig.7 Filter efficiency of different filter materials

图8 不同过滤材料的孔径分布

Fig.8 Pore size distribution of different filter materials

图9 过滤效率与时间的关系

Fig.9 The relationship between filtration efficiency and time

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