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US 4,297,253 AGranted
Method of making moldable product
OwnerPierre Sorbierinventor
Life of this patent
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Abstract
A product which can be molded to form a food container. The product is composed of lignin fibres or fibrils which are impregnated with a polymerizable resin, in one or more steps. The fibrils or fibres are formed in a homogeneous mass to permit molding the lignin product into an article under heat and pressure to polymerize the resin.
Claims8
A process for manufacturing a moldable product composed of minute fibers of a ligneous material, said fibers having a length greater than their width, comprising the steps of:
- impregnating thin elongated slivers of the ligneous material with a polymerizable resin, then drying the slivers, then again impregnating the slivers with polymerizable resin, then again drying the slivers, and then homogenizing the slivers to reduce their size and form said minute fibers.
A process for manufacturing a moldable product containing fibers of a ligneous material comprising the steps of:
- impregnating the fibers with a polymerizable resin, then drying the fibers, then again impregnating the fibers with polymerizable resin and again drying the fibers, and then homogenizing the fibers, and wherein after the first step of impregnating, the fibers are dried to a moisture content of less than 10%, and after the second step of impregnating, the fibers are dried to a moisture content of less than 3%.
Dependencies are inferred from the claim text.