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US 9,624,609 B2Granted
Composite materials
AssigneeRoxel France
InventorsNicolas Rumeau, Aurélie Buisson, Pascal Trouillot
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Abstract
Novel composite materials are provided consisting of a substrate based on fibers of natural, mineral or vegetable origin, and of a mixture formed from a matrix of water-based resin and an expanding agent. The nature and the proportions of the various elements constituting these novel composite materials is also provided. A method of manufacture for making these novel composite materials starting from the constituent elements and the characteristics of the different steps of said method is also provided.
Claims12
A composite material (18), comprising:
- a substrate of natural fiber having the structure of a felt, said felt being needle-punched on its two faces by supplying an additional polyethylene fiber;
- a thermosetting matrix formed from a water-based resin configured for impregnating the substrate completely;
- an expanding agent dispersed in the matrix, expansion of which is initiated by heating it to a given temperature, the expanding agent forming, with the thermosetting matrix, an aqueous mixture integrated with the substrate by impregnation;
- the proportions by weight of substrate and of thermosetting matrix used being defined so as to obtain an impregnated substrate having the following proportions by weight after drying:
- between 60% and 80% of fibers,
- between 40% and 20% of resin;
- the proportion by weight of expanding agent in the aqueous mixture being between 10% and 15%.
4 more elements
Dependencies are inferred from the claim text.