Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Noninterengaged fiber-containing paper-free web or sheet...
Patent
1987-08-28
1988-11-15
Bell, James J.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Noninterengaged fiber-containing paper-free web or sheet...
428284, 428285, 428286, 428287, 428297, 428298, 428340, B32B 506
Patent
active
047849037
ABSTRACT:
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/m.sup.2 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.
REFERENCES:
patent: 4292360 (1981-09-01), Riedel et al.
patent: 4413031 (1983-11-01), Poppelreuter
patent: 4418113 (1983-11-01), Kawashimo et al.
patent: 4596736 (1986-06-01), Eichhorn et al.
patent: 4680219 (1987-07-01), Vernois et al.
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