BOPA薄膜系列讲座（三）：平膜法尼龙薄膜生产工艺

Series Third of BOPA Film Lecture：Flat Film Technique in Nylon Film

本文主要介绍平膜法双向拉伸尼龙膜生产工艺，双向拉伸法又分为同步拉伸和分步拉伸两种不同工艺。不同工艺生产的薄膜有不同的优缺点，企业应根据使用要求选择最合适的薄膜。

This text mainly describes about the biaxially stretching in nylon film with flat film technique, which can be divided into two kinds of different processes, including synchronous tension stretching and step by step tension stretching. Films produced by different processes have different advantages and disadvantages, and the enterprises should choose the most suitable film according to the requirements of the usage.