| 摘要 |
A fibrous mat for hot molding to molded articles is described. This comprises a firm sandwich or union formed from a central tangled fiber layer subject to the action of a binder and in each case one heatproof, binder-containing tangled fiber surface layer on the two major surfaces of the central layer. The surface layer, at least of the unmolded mat, has a greater tensile strength than the central layer and in the case of a mat molded to the molded article is in the form of a moisture-regulating membrane. The weight per unit area of the binder-free portion of the heatproof tangled fibers of the surface layer is 10 to 100 g/m2 and the individual tangled fibers are coated in fiber-enveloping manner with 100 to 200% by weight, based on said weight per unit area, of a binder already precondensed prior to the molding of the fibrous mat, in such a way that the diameter ratio between the coated and the previously uncoated tangled fibers of the surface layer is between 1.4 and 1.75.
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