Process for preparing composite materials and products obtained with said process
AssigneePradom Limited
InventorMichel Berger
Life of this patent
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Abstract
The present invention relates to a process for the preparation of a composite material wherein the element used to reinforce the composite material is subjected to an electrostatic field induced by a high voltage electric current, said element being then impregnated with a liquid matrix material or precursor of matrix, while still under the influence of said field, and to the composite materials obtained by carrying out said process.
Claims6
Process for the preparation of a composite material that includes fibers used to reinforce the composite material comprising the steps of:
- subjecting the fibers to an electrostatic field induced by a high-voltage alternating electric current for a time interval sufficient to cause a modification of the surface of said fibers;
- and
- impregnating said fibers after the elapse of said time interval with a liquid matrix material or precursor of matrix, while still under the influence of said field, thereby consolidating bonding between the fibers and the matrix.
A process for the preparation of a composite material that includes fibers used to reinforce the composite material comprising the steps of:
- subjecting the fibers to a first electrostatic field that is induced by a first high-voltage electric current for a first non-zero time interval;
- subjecting the fibers to a second electrostatic field different from said first electrostatic field that is induced by a second high-voltage electric current for a second non-zero time interval after subjecting the fibers to said first electrostatic field;
- and
- impregnating said fibers with a liquid matrix or precursor of matrix, after the elapse of said two time intervals, while still under the influence of said second field thereby consolidating bonding between the fibers and the matrix.
Dependencies are inferred from the claim text.