GB972067A - Improvements in or relating to electrical insulating materials for cables - Google Patents
Improvements in or relating to electrical insulating materials for cablesInfo
- Publication number
- GB972067A GB972067A GB23160A GB23160A GB972067A GB 972067 A GB972067 A GB 972067A GB 23160 A GB23160 A GB 23160A GB 23160 A GB23160 A GB 23160A GB 972067 A GB972067 A GB 972067A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alumina
- insulation
- polythene
- proportion
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
972,067. Cable insulation. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Dec. 20, 1960 [Jan. 4, 1960], No. 231/60. Heading H1A. An electric power cable comprises one or more conducting cores embedded in or surrounded by a mass of insulating material which consists of a thermoplastic material having improved thermal conductivity by virtue of a content of up to 50% by weight of powdered alumina therein. In the simplified three-core cable illustrated the layers of insulation are made from homogeneous mixtures largely of polythene and alumina powder, there being at least 20 parts by weight of alumina to 100 parts of polythene. The cores within their individual insulating layers A are embedded in a mass C within a protective sheath B of similar insulating material. The proportion of alumina to polythene may be varied in the three parts A, B, C of the insulation. For example, the core insulation A may have less alumina than the general insulation C in order to improve the electrical characteristics near the cores, and the proportion of alumina in the outer sheath B may be restricted so that good mechanical properties, such as resistance to abrasion, may be obtained. The mechanical properties may be improved in known manner by the addition of a proportion of polyisobutylene or butyl rubber. Similar cables may be made using other thermoplastic materials, especially using polyvinylchloride. Plasticizers may be added to polyvinyl chloride mixes to counteract the hardening effect caused by loading with alumina.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB23160A GB972067A (en) | 1960-01-04 | 1960-01-04 | Improvements in or relating to electrical insulating materials for cables |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB23160A GB972067A (en) | 1960-01-04 | 1960-01-04 | Improvements in or relating to electrical insulating materials for cables |
Publications (1)
Publication Number | Publication Date |
---|---|
GB972067A true GB972067A (en) | 1964-10-07 |
Family
ID=9700722
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB23160A Expired GB972067A (en) | 1960-01-04 | 1960-01-04 | Improvements in or relating to electrical insulating materials for cables |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB972067A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4370076A (en) | 1977-03-10 | 1983-01-25 | Bicc Limited | Transportation systems and electric cables for use therein |
EP0238261A1 (en) * | 1986-03-19 | 1987-09-23 | Kabushiki Kaisha Toshiba | Deflection device for a cathode ray tube |
-
1960
- 1960-01-04 GB GB23160A patent/GB972067A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4370076A (en) | 1977-03-10 | 1983-01-25 | Bicc Limited | Transportation systems and electric cables for use therein |
EP0238261A1 (en) * | 1986-03-19 | 1987-09-23 | Kabushiki Kaisha Toshiba | Deflection device for a cathode ray tube |
US4749975A (en) * | 1986-03-19 | 1988-06-07 | Kabushiki Kaisha Toshiba | Cathode ray tube deflection device having heat dissipation means |
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