Semiconductive coating and application process for shielded elastomeric electrical cable accessories

Abstract

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, said method comprising: 
 providing a substrate having a desired contour in relation to the electrical cable accessory;    coating the substrate with an uncured elastomeric semiconductive material to form a coated substrate, said coating performed by brushing, dipping, spraying, draw down or roller coating said uncured elastomeric semiconductive material onto said substrate;    applying an uncured elastomeric insulating dielectric material around the coated substrate; and    concurrently curing the elastomeric semiconductive material and elastomeric insulating dielectric material by applying heat and pressure sufficient to transfer the elastomeric semiconductive material to the elastomeric insulating dielectric material by chemical bonding.    
   
   
       2 . The method of  claim 1 , further comprising the step of applying an outermost semiconductive jacket.  
   
   
       3 . The method of  claim 1 , further comprising: 
 applying a pre-molded semiconductive jacket over the coated substrate leaving a space between the coated substrate and outer jacket;    positioning a mold over the outer jacket; and    applying the uncured elastomeric insulating dielectric material around the coated substrate by injecting the uncured insulating dielectric material into the space between the outer jacket and the coated substrate.    
   
   
       4 . The method of  claim 1 , further comprising: 
 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;    applying the uncured elastomeric insulating dielectric material around the coated substrate by injecting 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.    
   
   
       5 . The method of  claim 1 , wherein said elastomeric semiconductive material comprises solvents.  
   
   
       6 . The method of  claim 1 , wherein said solvents are evaporated before molding the uncured insulating dielectric material around the coated substrate.  
   
   
       7 . The method of  claim 1  wherein said substrate comprises at least one of steel, stainless steel, aluminum, and polytetrafluoroethylene.  
   
   
       8 . The method of  claim 1 , wherein said elastomeric semiconductive material does not contain a catalyst.  
   
   
       9 . The method of  claim 1 , wherein said uncured insulating dielectric material comprises a catalyst.  
   
   
       10 . The method of  claim 9 , wherein said catalyst comprises peroxide.  
   
   
       11 . An article of manufacture for shielding an electrical cable, the article of manufacture comprising an elastomeric semiconductive material transferred to and chemically bonded with an elastomeric insulating dielectric material by applying an uncured elastomeric insulating dielectric material to an uncured elastomeric semiconductive material and concurrently curing the elastomeric insulating dielectric material and elastomeric semiconductive material.  
   
   
       12 . An electrical cable accessory comprising a semiconductive insulating shield, said shield manufactured by: 
 providing a substrate having a desired contour in relation to the electrical cable accessory;    coating the substrate with an uncured elastomeric semiconductive material to form a coated substrate, said coating performed by brushing, dipping, spraying, draw down or roller coating said uncured elastomeric semiconductive material onto said substrate;    applying an uncured elastomeric insulating dielectric material around the coated substrate; and    concurrently curing the elastomeric semiconductive material and elastomeric insulating dielectric material by applying heat and pressure sufficient to transfer the elastomeric semiconductive material to the elastomeric insulating dielectric material by chemical bonding.