Plenum Cable Flame Retardant Layer/Component with Excellent Aging Properties
First Claim
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1. A plenum cable component prepared from a polyolefin-based composition comprising:
- a. an olefinic polymer andb. a metal hydroxide being surface treated with a phosphorous-based composition,wherein a test specimen prepared from the polyolefin-based composition having a non-aged dissipation factor less than or equal to about 0.006 and an aged dissipation factor less than about 0.009, wherein the dissipation factors being measured at 1.0 MHz, and wherein the aged dissipation factor being measured on an aged test specimen subjected, for two weeks, to a temperature of 90 degrees Fahrenheit and a relative humidity of 90 percent.
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Abstract
The present invention is a plenum cable component with excellent fire retardant and aging properties. The plenum cable component is prepared from a polyolefin-based composition, containing an olefinic polymer and a surface treated metal hydroxide. Depending upon the surface treatment, the composition may comprise other components. The present invention is also a method for selecting a composition for preparing the plenum cable component as a separator and a method for preparing a communications cable therefrom.
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13 Claims
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1. A plenum cable component prepared from a polyolefin-based composition comprising:
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a. an olefinic polymer and b. a metal hydroxide being surface treated with a phosphorous-based composition, wherein a test specimen prepared from the polyolefin-based composition having a non-aged dissipation factor less than or equal to about 0.006 and an aged dissipation factor less than about 0.009, wherein the dissipation factors being measured at 1.0 MHz, and wherein the aged dissipation factor being measured on an aged test specimen subjected, for two weeks, to a temperature of 90 degrees Fahrenheit and a relative humidity of 90 percent. - View Dependent Claims (2, 3, 9, 10, 11, 12, 13)
wherein the communication cable passes the requirements of NFPA-262;
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4. A plenum cable component prepared from a polyolefin-based composition comprising:
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a. an olefinic polymer having a maleic anhydride graft and b. a metal hydroxide being surface treated, wherein a test specimen prepared from the polyolefin-based composition having a, non-aged dissipation factor less than or equal to about 0.006 and an aged dissipation factor less than about 0.009, wherein the dissipation factors being measured at 1.0 MHz, and wherein the aged dissipation factor being measured on an aged test specimen subjected, for two weeks, to a temperature of 90 degrees Fahrenheit and a relative humidity of 90 percent. - View Dependent Claims (5, 6, 7)
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8. A plenum cable component prepared from a polyolefin-based composition comprising:
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a. an olefinic polymer, b. an olefinic polymer having a maleic anhydride graft, and c. a metal hydroxide being surface treated, wherein a test specimen prepared from the polyolefin-based composition having a non-aged dissipation factor less than or equal to about 0.006 and an aged dissipation factor less than about 0.009, wherein the dissipation factors being measured at 1.0 MHz, and wherein the aged dissipation factor being measured on an aged test specimen subjected, for two weeks, to a temperature of 90 degrees Fahrenheit and a relative humidity of 90 percent.
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Specification