CELLULAR AROMATIC POLYAMIDE ARTICLES WITH CLOSED CELLS, AND PROCESS FOR THE PREPARATION THEREOF

摘要

Pneumatic cellular aromatic polyamide articles characterized by (a) being articles prepared substantially from aromatic polyamide. (b) said articles having numerous bubbles at the void ratio in the range of 10 to 95%, (c) said bubbles being substantially enclosed in said articles, and (d) said articles having an average thickness in the range of 0.2 to 10 mm on the cross section made by cutting them at right angles to the longest axis. The present invention provides also a process for the preparation thereof. According to the present invention, there are suitably provided pneumatic cellular aromatic polyamide articles having a high strength and a wide range of void ratio, comparatively heavy thickness, excellent heat resistance and thermal insulation.