Patent ID: 6407017
Filing Date: 2002-06-18
Classification: D21H,H01B,H05K,Y10T

Abstract:
A wholly aromatic polyamide fiber synthetic paper sheet comprising 70 to 96% by weight of a wholly aromatic polyamide staple fiber component and 4 to 30% by weight of a binder component comprising at least one member selected from the group consisting of organic resinous binders and heat-resistant organic polymer fibrids, the wholly aromatic polyamide staple fiber component including 30% by weight or more of para wholly aromatic polyamide staple fibers each having at least two annular projections expanding from the peripheral surface of the staple fiber, spaced from each other, and having an average ratio R/&ggr; of the largest diameter R of the annular projections to the smallest diameter &ggr; of the annular projection-free portions of the staple fibers, of 1.1 or more.