Porous formtion mechanism was additional discussed, and it was considered that micro-fibrils were pulled out of the ribbon-like crystallines of PTFE resin particles while nodes were the agglomeration of un-stretching PTFE particles.

• 另外探讨了微孔膜形成机理，认为纤维是从带状结晶的树脂颗粒中被拉出的，而结点是未被拉伸的树脂聚集在一起形成的。