Process for coating fibers and applications thereof to the production of composite materials
AssigneePradom Limited
InventorMichel Berger
Life of this patent
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Abstract
The present invention relates to a process for coating reinforcing elements preferably in fiber form, wherein said material is treated, between two electrodes, by the field obtained by means of a direct electric current of voltage included between 50 and 150,000 V and/or by means of an alternating electric current of frequency between 50 and 1,000 Hz and of voltage included between 10,000 and 30,000 V, and said element is placed in contact with a powder of a conductive or semi-conductive material.
Claims10
A composite material constituted by the dispersion, in a known matrix of reinforcing elements, preferably in fiber form, resulting from the steps of:
- treating said reinforcing elements by subjecting said reinforcing elements to an electric field between two electrodes;
- said treating step producing a swelling of said reinforcing elements;
- and
- placing said swollen reinforcing elements in contact with a powder of conductive or semi-conductive material.
A composite material constituted by coated reinforcing elements, preferably in fiber form, dispersed in a matrix constituted by a hydraulically setting compound, the coated reinforcing elements resulting from the steps of:
- treating said reinforcing elements by subjecting said reinforcing elements to an electric field between two electrodes;
- said treating step producing a swelling of said reinforcing elements;
- and
- placing said swollen reinforcing elements in contact with a powder of conductive or semi-conductive material.
Dependencies are inferred from the claim text.