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US 4,615,689 AGranted
Method for preparing paperlike products from fibers threaded with polymer
AssigneeMobil Oil Corporation
InventorsJames G. Murray, Harold G. Tinger
Life of this patent
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Abstract
Fibers, such as wood fibers, are treated with a solvent solution of a thermoplastic polymer, e.g., polypropylene; the solvent is removed; and the treated fibers are fused into an article such as a fiber-polymer sheet or a board.
Claims16
A method for preparing a film-polymer product comprising the sequential steps of:
- (a) treating separated fibers with a heated solvent solution of a polyolefin polymer to coat the fibers;
- (b) precipitating the polymer on the fibers by cooling the coated fibers to a temperature at which the polyolefin is not soluble;
- (c) removing at least the major portion of the solvent as a liquid;
- (d) heat treating the coated fibers at a temperature sufficient to fuse the polymer and to form an article.
1 more element
Dependencies are inferred from the claim text.