聚乙烯醇起泡主要是由于在制作的过程中添加了许多的表面活性助剂，这些助剂有很强的易起泡特性，经过机器的运转、搅拌、以及其它制取工艺，会导致这些助剂化学性不稳定，从而导致泡沫的产生。
Polyvinyl alcohol foaming is mainly due to the addition of many surface active agents during the production process. These auxiliaries have strong foaming properties. After the operation of the machine, stirring and other preparation processes, these auxiliaries will cause chemical instability, resulting in foam formation.