Semiconductive tapes and methods for making the same
AssigneeScapa UK Limited
InventorsRebecca Wilson, Geoffrey Henstock
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Abstract
Semiconductive tapes for use with electric cables, such as high voltage power cables, and methods for manufacturing such tapes, are provided. A semiconductive tape comprises a first layer comprising a fabric and a second layer in contact with the first layer. The second layer comprises an activated carbon or carbon black. The semiconductive tapes have increased friction while still maintaining sufficient electrical conductivity for use as wrappings for electric power cables, thereby improving the manufacturing process and reducing the overall cost of production.
Claims16
A semiconductive tape comprising:
- a first layer comprising a fabric;
- a second layer in contact with the first layer, the second layer comprising a polymer and an activated carbon or carbon black, wherein the activated carbon or carbon black is about 6% to about 35% by weight of the second layer and an overall a solid content of the second layer is about 30% to about 60%;
- and
- wherein the polymer comprises an acrylic copolymer dispersed in water.
A semiconductive tape for use with an electrical cable, the tape comprising:
- a fabric;
- and
- a polymer layer in contact with the fabric and comprising an activated carbon or carbon black, wherein the activated carbon or carbon black is about 6% to about 35% by weight of the second layer and an overall solid content of the second layer is about 30% to about 60%, wherein the polymer layer comprises an acrylic copolymer dispersed in water;
- and
- wherein the tape has a resistance of less than or equal to about 1 million (Ω/cm), and a coefficient of static friction of at least about 1.00.
Dependencies are inferred from the claim text.