Plastic and nonmetallic article shaping or treating: processes – Forming articles by uniting randomly associated particles – With reshaping or surface embossing of formed article
Patent
1990-05-01
1991-12-10
Theisen, Mary Lynn
Plastic and nonmetallic article shaping or treating: processes
Forming articles by uniting randomly associated particles
With reshaping or surface embossing of formed article
156148, 156296, 264122, 264257, B29C 4302
Patent
active
050716085
ABSTRACT:
Fiber reinforced thermoplastic molded products, sheets, and the like, having a glossy surface are produced by intimately blending discrete reinforcing fibers (e.g. fiberglass) and thermoplastic fibers (e.g. polypropylene or polycarbonate) into a web. The web is heated to the melting point of the thermoplastic fibers while applying pressure, to eliminate air and press the web into a consolidated structure. Breakage of the reinforcing fibers is minimized by limiting the thickness of the web and limiting the pressure so as to produce a consolidated structure with minimal fiber breakage and a Notched Izod of at least one. Layered consolidated structures, some without reinforcing fibers, may be heated and pressed together to form a final structure having a thickness greater than the individual structures. The great majority of the fibers are provided so that the fibers of each type are within the range of about 0.5-5 inches. A sheet capable of replacing an automotive metal panel (that is having sufficiently high gloss, rigidity and impact characteristics) is provided, the sheet having a Notched Izod of at least about two and preferably at least about five. Products with Notched Izods of up to eight or nine may be achieved.
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WO88/09406, Dec. 1988.
Miller Gerald W.
Smith Rayna W.
C. H. Masland & Sons
Theisen Mary Lynn
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