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US 9,283,694 B2Granted
Composite polyester article
AssigneeRhodia Operations
InventorsStéphane Jeol, Gilles Orange, Franck Touraud
Life of this patent
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Abstract
A method for manufacturing a composite article is described that includes a step of impregnating a reinforcing fabric with a semi-aromatic polyester composition in the molten state, having a melt viscosity η of 20 Pa·s to 200 Pa·s. The reinforcing fabric can be maintained at a temperature of plus or minus 50° C. relative to the melting temperature of the polyester.
Claims6
A method of manufacturing a composite article, the method comprising:
- a) impregnating a reinforcing fabric with a semi-aromatic polyester composition, wherein the semi-aromatic polyester is polybutylene terephthalate (PBT), in a molten state, having a melt viscosity η of from 58 Pa·s to 200 Pa·s, said reinforcing fabric being maintained at a temperature that is ±50° C. relative to the melting point of said polyester, said melt viscosity being measured using a plate-on-plate rheometer of diameter 50 mm, with stepwise scanning of shearing in the range from 1 s−1 to 160 s−1, by melting a film of said semi-aromatic polyester with a thickness of 150 μm at a temperature that is 25° C. to 30° C. above its melting point;
- and
- b) cooling and then recovering the composite article.
Dependencies are inferred from the claim text.