Semiconductive coating and application process for shielded elastomeric electrical cable accessories
View Patent ↗A method is provided for manufacturing a semiconductive insulating shield for an electrical cable accessory. The method includes providing a substrate having a desired contour in relation to the electrical cable accessory. The substrate is then coated with an elastomeric semiconductive material to form a coated substrate. An elastomeric insulating dielectric material is then molded around the coated substrate, and the elastomeric semiconductive material and elastomeric insulating dielectric material are cured by applying heat and pressure sufficient to transfer the elastomeric semiconductive material to the elastomeric insulating dielectric material by chemical bonding.
1. A method for manufacturing a semiconductive shield for an electrical cable accessory, the method comprising:
providing a substrate having a desired contour in relation to the electrical cable accessory;
coating the substrate with an elastomeric semiconductive material to form a coated substrate;
coating an inner surface of a mold with an uncured semiconductive jacket material;
positioning the mold over the coated substrate, leaving a space between the coated inner surface of the mold and the coated substrate;
molding an uncured elastomeric insulating dielectric material around the coated substrate by applying the uncured insulating dielectric material into the space between the semiconductive jacket material and the coated substrate; and
concurrently curing the semiconductive jacket material, elastomeric insulating dielectric material, and elastomeric semiconductive material.
2. The method of claim 1 , wherein said elastomeric semiconductive material comprises solvents.
3. The method of claim 2 , wherein said solvents are evaporated before molding the uncured insulating dielectric material around the coated substrate.
4. The method of claim 1 wherein said substrate comprises at least one of steel, stainless steel, aluminum, and polytetrafluoroethylene.
5. The method of claim 1 , wherein said elastomeric semiconductive material does not contain a catalyst.
6. The method of claim 1 , wherein said uncured insulating dielectric material comprises a catalyst.
7. The method of claim 6 , wherein said catalyst comprises peroxide.