Filling materials for communications cable
US4382821A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 1981 |
| Grant date | May 10, 1983 |
| Priority date | — |
| Expiry date | Nov 2, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B7/285
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed are telephone cable filling materials and telephone cables comprised of a plurality of insulated electrical conductors twisted together to form a core in which there are a multiplicity of interstices between the insulated electrical conductors filled with the cable filler materials. The filling materials are composed of a petrolatum base material and inorganic microspheres and can be divided into two groups: (1) a first group to fill cables used at temperatures below the melting point of the petrolatum and (2) a second group to fill cables that may be used above that temperature. The first group is composed of mixtures of 40 to 90 weight percent petrolatum and 1 to 60 weight percent inorganic hollow (air filled) microspheres. When mixtures from this group are used as a filler in a telephone cable, the filler has a drip point nearly equal to the average melting point of the petrolatum, normally 57.2.degree. C. The second group is composed of two embodiments. The first embodiment comprises 62 to 95 weight percent petrolatum, 1 to 35 weight percent inorganic hollow microspheres, and 1 to 8 weight percent low molecular weight polyethylene dissolved in the petrolatum. The seco…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.