Method producing a color coded, cellular thermoplastic resin coated wire and the materials necessary for the coating
US4302410A · kind A · utility
6Cited by
9References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 30, 1980 |
| Grant date | Nov 24, 1981 |
| Priority date | — |
| Expiry date | Apr 30, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/92
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A particulate concentrate, for example pellets, is provided comprising predetermined amounts of a pigment and a blowing or foaming agent in a polymer matrix. The concentrate can be added to an extruder together with a polymer insulating material for the formation of color-coded cellular insulation on a conductor wire of a cable, for example a communication cable. The composition of the concentrate is so determined that different color-coded, cellular, insulating coatings can be produced which are dielectrically matched, as required.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.