催化剂粒子填充对双向拉伸PTFE薄膜微孔结构的影响

The Influence of Particle Stuffing on the Micro-Porous Structure of Biaxial Stretching PTFE Film

以PTFE树脂和催化剂粒子为原料,通过一系列机械操作:混和、过筛、成熟、压坯、挤出棒状物、压延成片材、纵向拉伸、横向拉伸、固化,制备了一种含有催化剂粒子的PTFE薄膜。利用SEM和压汞仪研究了薄膜的微孔结构。结果表明:在相同的制膜工艺下,催化剂粒子填充增加了PTFE薄膜的平均孔径和孔隙率,并且随填充量的增大,薄膜的平均孔径和孔隙率增加。

PTFE with catalytic particle was prepared from PTFE resin and catalytic particle through a series mechanical operations including blend, sifting out, press, extrusion, rolling, uniaxial and biaxial stretching, heat setting. The structure of PTFE film was investigated via SEM and mercury porosimetry. Experimental results showed that catalytic particle stuffing on the PTFE film increases its average pore diameter and porosity under the same mechanical operations, and the average pore diameter and porosity of PTFE film increases with increasing the quantity of catalytic particle.