Abstract: Nowadays, people mostly rely on air conditioners to maintain their thermal and moisture balance indoors. This method not only consumes a lot of energy, but also cannot meet the thermal and moisture comfort of the human body in outdoor environments. As a new type of functional textile, thermal and moisture management fabrics can effectively solve this problem. Currently, fabrics for thermal and moisture management are mainly used in hot environments, while there is little research on fabrics for use in cold environments, especially in winter outdoor sports. Thermal and moisture management fabrics should have two properties: on the one hand, they should be able to timely evacuate sweat generated by the human body, and on the other hand, they should have windproof performance. Therefore, laminated composite fabrics made with e-PTFE films that possess windproof, waterproof, and moisture-permeable properties have become a popular choice.
To address the issue of fabricating fabrics with thermal and moisture management capabilities for winter outdoor sports, this paper mainly studies the hot pressing process of e-PTFE film laminated composite fabrics. A green and environmentally friendly PA hot melt adhesive film, which exhibits relatively uniform colloidal properties, is selected as the adhesive, and e-PTFE film serves as the intermediate functional film. Firstly, a single factor experiment was conducted to investigate the effects of hot pressing time, temperature, pressure, and adhesive amount on the properties of e-PTFE film laminated composite fabrics in the hot pressing process. The air permeability of the prepared e-PTFE film laminated composite fabrics was≤10 mm/s, indicating windproof performance. Moreover, with the increase of hot pressing time and temperature, the air permeability and peeling strength of the laminated composite fabrics showed a trend of first increasing and then decreasing; as the hot pressing pressure increased, the moisture permeability and peel strength of the fabric gradually decreased; as the amount of adhesive applied increased, the moisture permeability of the fabric gradually decreased, while the peeling strength increased instead. By analyzing the properties of e-PTFE film laminated composite fabrics, the ranges of hot pressing time, temperature, and adhesive amount were determined to be 10‒20 s, 140‒160 ℃, 5‒15 g/m2, and the hot pressing pressure was determined to be 0.5 MPa. Afterwards, a three-factor three-level response surface experiment was designed using the Box Behnken response surface methodology to obtain analysis of variance tables and response surface graphs. From the response surface graphs, it can be seen that the interaction between hot pressing time, temperature, and adhesive amount had a significant impact on moisture permeability and peel strength. Thus, the optimal hot pressing process for e-PTFE film laminated composite fabric was obtained, with a hot pressing time of 15 seconds, a hot pressing temperature of 150 ℃, an adhesive amount of 10 g/m2, and a hot pressing pressure of 0.5 MPa; the air permeability of the e-PTFE film laminated composite fabric obtained under this process condition was 1.96 mm/s, the moisture permeability was 5670.60 g/(m2·24h), and the peeling strength was 2.63 N.
This paper studies the relationship between the hot pressing process parameters and the wind resistance, moisture permeability, and peeling strength of e-PTFE film laminated composite fabrics through response surface methodology, and obtains the optimal hot pressing process. At the same time, it lays the foundation for the subsequent use of hot pressing methods to prepare thermal and moisture management fabrics suitable for winter. These research results also provide reference for the preparation of laminated composite fabrics using e-PTFE films in the future.

Key words: Box Behnken response surface methodology, e-PTFE microporous membrane, laminated composite fabric, hot pressing process, peeling strength

摘要： 选取聚酰胺共聚物（PA）热熔胶网膜作为黏合剂，通过改变热压工艺中热压时间、温度、压强和上胶量4个工艺参数，制备不同参数的膨体聚四氟乙烯（e-PTFE）膜层压复合织物，并在单因素的基础上通过Box-Behnken响应面法分析不同e-PTFE膜层压复合织物的防风性、透湿性以及剥离强力，得出最优热压工艺。结果表明：制备e-PTFE膜层压复合织物的最优热压工艺为热压时间15 s、热压温度150 ℃、热压压强0.5 MPa、上胶量10 g/m2。在该工艺条件下得到的e-PTFE膜层压复合织物的剥离强力为2.63 N、透气率为1.96 mm/s、透湿量为5670.60 g/(m2·24h)。研究结果发现，采用的Box-Behnken响应面法得出的最优热压工艺结果更加准确，且制备的层压复合织物与原织物相比防风性和透湿性均有所改善，同时为后续制备热湿管理织物提供了研究思路。

关键词: Box-Behnken响应面法, 膨体聚四氟乙烯（e-PTFE）膜, 层压复合织物, 热压工艺, 剥离强力