Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
Patent
1974-08-22
1976-05-25
Van Balen, William J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including variation in thickness
428220, 428285, 428290, B32B 526, B32B 528
Patent
active
039595722
ABSTRACT:
A coated, decorative panel or tile of molded fibrous material is provided. A pad or pelt of mineral fibers, preferably glass fibers held together by a binder in an uncured state, is compressed and heated in a matched metal contoured mold to the desired permanent shape, after which a finish coating is supplied. The fibers of the panel are heterogeneously arranged with most fibers being parallel to the contoured surface of the product but with some lying angularly with respect thereto. Also, some portions of the uncured fiber pad may be compressed in the mold to a greater extent than others. In addition, the concentration of binder may also vary widely over the product. These factors result in a variation in the apparent density, and when the panel is subsequently coated, the degree of absorption of the coating material differs widely, resulting in an undesirable nonuniform appearance. To overcome these problems, a fibrous sheet is disposed on the surface of the uncured pad which is to be molded to the desired contour. When the product is molded, the sheet conforms to the three-dimensional contoured surface of the mold along with the fibrous pad, with the sheet bridging the more open portions of the product surface and masking non-uniform areas thereof. A substantially more uniform appearance is thereby achieved even when the product is coated with less coating material after molding.
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Corcoran, Jr. Neal A.
McCartan Daniel A.
Gutchess, Jr. Allen D.
Overman John W.
Owens-Corning Fiberglas Corporation
Roche R. J.
Van Balen William J.
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