公开(公告)号：US4482603A

公开(公告)日：1984-11-13

申请号：US485634

申请日：1983-04-18

申请人： Tsugushi Yoshida ,  Hideharu Sasaki ,  Toru Sawaki ,  Keizo Shimada

发明人： Tsugushi Yoshida ,  Hideharu Sasaki ,  Toru Sawaki ,  Keizo Shimada

IPC分类号： D04H1/4342 ,  D04H1/552 ,  B32B27/00 ,  D02G3/00

CPC分类号： D04H1/54 ,  Y10T428/249978 ,  Y10T428/2973 ,  Y10T442/635 ,  Y10T442/688

摘要： A wholly aromatic polyamide fiber non-woven sheet having satisfactory density, impregnating property, heat resistance, and surface evenness, comprises mutually, randomly entangled fibers consisting essentially of a wholly aromatic polyamide having 85 molar % or more of at least one type of recurring units selected from those of the formulae (I) and (II): ##STR1## The non-woven sheet is characterized in that the wholly aromatic polyamide fibers have portions thereof having a flattened cross-sectional profile; the aromatic polyamide fibers are fuse-bonded to each other at least at portions thereof intersecting each other; and the sheet includes pores connected to each other, and having a size at the peak of pore size distribution, of 13 microns or less determined by means of a mercury porosimeter, and no voids isolated from each other, and has a porosity of from 5% to 40% and an air permeability rate of from 0.1 to 10,000 sec/100 ml.

摘要翻译： 具有令人满意的密度，浸渍性，耐热性和表面均匀性的全芳族聚酰胺纤维无纺布片包括相互无规缠结的纤维，主要由具有85摩尔％以上的至少一种类型的重复单元的全芳香族聚酰胺 选自式（I）和（II）的那些：无纺布片的特征在于，全芳族聚酰胺纤维的部分具有扁平的横截面 简介 芳族聚酰胺纤维至少在彼此相交的部分彼此熔合结合; 并且片材包括彼此连接的孔，并且具有通过水银孔隙度计确定的13微米或更小的孔径分布峰值的尺寸，并且没有彼此分离的空隙，并且具有5的孔隙率 ％至40％，透气率为0.1至10,000秒/ 100ml。