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US 9,174,410 B2Granted
Composite materials
AssigneesHexcel Composites Limited, Technical Fibre Products Limited
InventorsMartin Simmons, Michael Jeschke
Life of this patent
Estimating the term…
Abstract
A prepreg comprising resin and at least one fiber layer and further comprising an electrically insulating layer and an electrically conducting layer is provided, and particularly wherein the conductive layer is at or near the top surface, beneath that is the insulating layer and beneath that is a fiber/resin interleaf structure.
Claims12
A curable prepreg comprising:
- a fibre/resin structure comprising two layers of fibres between which is located a layer of uncured resin, said uncured resin comprising electrically conductive particles which are present in an amount of from 0.2 to 20 volume percent of said prepreg and wherein said electrically conductive particles have a particle size of from 10 to 30 microns;
- an electrically conductive layer comprising a veil of metal coated fibres, said electrically conductive layer having a weight per unit area of from 5 to 50 grams per square meter;
- and
- an electrically insulating layer located between said electrically conductive layer and said fibre/resin structure, said electrically insulating layer comprising a non-woven structure made from bi-component fibres said bi-component fibres comprising a stacked structure of eleven alternating layers of polyester and nylon where the bi-component fibres are 65% polyester and 35% nylon, said electrically insulating layer having a weight per unit area of from 5 to 30 grams per square meter.
1 more element
Dependencies are inferred from the claim text.