| 摘要 |
PURPOSE:To obtain the subject nonwoven fabric having excellent stretchability and suitable as a substrate for artificial leather, etc., by combining a multi- component fiber composed of an elastic fiber of polyurethane elastomer and a specific other non-elastic polymer with a multi-component fiber composed of non-elastic polymers other than the above polymer and entangling the fibers. CONSTITUTION:(A) An elastic polymer composed mainly of a polyurethane and (B) a non-elastic polymer (e.g., polyethylene) having solvent and decomposition agent different from those of the component A are dissolved in e.g., a common solvent and the obtained dope is spun to produce a multi-component fiber I. The ratio of the component A is preferably 30-80wt.%. Separately, a multi-component fiber II is produced by spinning (C) a non-elastic polymer such as polyethylene terephthalate and (D) a polymer (e.g., polystyrene) having solvent solubility and decomposability different from those of the component C in the same manner as above. The produced multi-component fiber II is combined with the above multi-component fiber I, opened e.g., with a carding machine to form a web and subjected to entangling treatment to obtain the objective nonwoven fabric. |
