在袋装及裹包等包装应用中，柔性材料的封口是很重要的，其中塑包装及其复合材料的热封是常用的封口形式。但塑料薄膜的热封性能受到多方面因素的综合影响，有时往往也会形成较难的热封控制条件。因此，本文主要将讨论可热封材料的热封特性及其影响因素，浅述其一般规律。热封 Sealing of flexible materials is important in packaging applications such as bagging and wrapping, where the sealing of plastic packages and their composite materials is commonly used. However, the heat sealing performance of plastic film is affected by the comprehensive effects of many factors, and sometimes it often forms a difficult heat seal control condition. Therefore, this article will mainly discuss the heat sealing properties of heat-sealable materials and their influencing factors, a brief description of its general laws. Heat seal