Semiconductive compositions and cable shields employing same
AssigneeGeneral Cable Technologies Corporation
InventorMark R. Easter
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Abstract
Novel semiconducting compositions for use in semiconductive cable shields having improved electrical properties as measured by ACLT and AWTT are described. The composition comprises a base polymer and about 25 percent to about 45 percent by weight of carbon black having particle size of from about 15 nm to about 22 nm, Iodine number of from about 115 mg/g to about 200 mg/g, and DBP number of from about 90 cm3/100 g to about 170 cm3/100 g.
Claims20
A cable comprising a conductive core and a semiconducting layer surrounding the conductive core, said semiconducting layer comprising:
- a) about 55 percent to about 75 by weight of a base polymer;
- and
- b) about 25 percent to about 45 percent by weight of carbon black having particle size of from about 15 nm to about 22 nm, an Iodine number of from about 115 mg/g to about 200 mg/g, and a DBP number of from about 90 cm3/100 g to about 170 cm3/100 g.
A semiconducting composition comprising:
- a) about 55 percent to about 75 by weight of a base polymer;
- and
- b) about 25 percent to about 45 percent by weight of carbon black having a particle size from about 15 nm to about 22 nm, an Iodine number of from about 115 mg/g to about 200 mg/g, and a DBP number from about 90 cm3/100 g to about 170 cm3/100 g.
A method of making a semiconducting composition comprising blending about 55 percent to about 75 percent by weight of a base polymer with about 25 percent to about 45 percent by weight of a carbon black having particle size from about 15 nm to about 22 nm, an Iodine number from about 115 mg/g to about 200 mg/g, and DBP number from about 90 cm3/100 g to about 170 cm3/100 g.
Dependencies are inferred from the claim text.