Patent ID: 6838401
Filing Date: 2005-01-04
Classification: D04H,D21H,H05K,Y10T

Abstract:
1. A heart-resistant fiber paper sheet comprising staple fibers of a heat-resistant organic polymer, undrawn or low ratio drawn para-aromatic polyamide staple fibers having a specific gravity of not more than 1.380 and a breaking elongation of not more than 5.8%, and fibrids comprising a heat-resistant organic polymer as a main component, optionally in combination with an organic resin binder, characterized in that the amount of said staple fibers is 45 to 97 percent by weight based on the total amount of said heat-resistant fiber paper sheet; the amount of said fibrids is 3 to 55 percent by weight based on the total amount of said heat-resistant fiber paper sheet; and said fibrids comprising said organic polymer, and/or the staple fibers comprising said para-aromatic polyamide are partially softened and/or melted to exhibit the actions of binders.