| 摘要 |
Nonwoven fabrics are disclosed, which are produced by molding a material containing as a main component a styrenebased polymer with mainly syndiotactic configuration, in such a manner that a difference between the absolute value of heat of fusion ¦.DELTA.Hf¦ and the absolute value of crystallizing enthalpy on heating ¦.DELTA.Htcc¦ of the molded polymer is at least 1 cal/g. These nonwoven fabrics are excellent in heatresistant and chemical-resistant characteristics, and are suitable for use as medical fabrics, industrial filters, battery separators and so forth. |
