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US 11,993,707 B2Granted
Polymer composite containing recycled carbon fibers
AssigneeCelanese Sales Germany GmbH
InventorsDirk Zierer, Patrick Nickolay, Tim Feuerstack
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Abstract
A polymer composition is described well suited for being combined with relatively short fibers. The fibers, for instance, can have a mean fiber length of less than 1,000 microns, such as less than 700 microns, such as less than 500 microns. The polymer formulation allows for intimate mixing with the fibers without having to use a sizing agent. In one embodiment, the composition contains a polybutylene terephthalate polymer combined with a thermoplastic polymer having lower crystallinity.
Claims11
A reinforced polymer composition comprising:
- a polyester polymer comprising a polybutylene terephthalate polymer;
- a fatty acid ester blended with the polyester polymer;
- a nucleant blended with the polyester polymer;
- a heat stabilizing agent and an antioxidant blended with the polyester polymer;
- and
- carbon fibers combined with the polyester polymer, the carbon fibers being present in the polymer composition in an amount from about 5% to about 50% by weight, wherein the carbon fibers are substantially free of a sizing agent, the carbon fibers having a mean fiber length of from about 50 microns to about 500 microns.
3 more elements
Dependencies are inferred from the claim text.