| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fiber nonwoven fabric which has excellent water resistance over a long period and has good flexibility and stretchability. <P>SOLUTION: This fiber nonwoven fabric comprising fibers consisting mainly of a (meth)acrylic block copolymer is characterized in that the (meth)acrylic block copolymer satisfies the following (a) to (c). (a) The (meth)acrylic block copolymer has a structure represented by general formula (I): A1-B-A2 [A1 and A2 are each identically or differently a polymer block comprising a methacrylate, an acrylate or an aromatic vinyl compound; B is a polymer block comprising a methacrylate or an acrylate, is not compatible with A1 and A2, and has a glass transition temperature of ≤20°C]. (b) The (meth)acrylic block copolymer has a number-average mol.wt. of 8,000 to 700,000. (c) The total content of the polymer block A is 20 to 45 wt.% based on the total weight of the (meth)acrylic block copolymer. <P>COPYRIGHT: (C)2004,JPO |
