Method of manufacturing a high-strength, polyurethane-impregnated polyamide cable
US4095404A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 25, 1977 |
| Grant date | Jun 20, 1978 |
| Priority date | — |
| Expiry date | Apr 25, 1997 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD07B2207/404
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A high-strength, low weight, electromechanical cable is manufactured from aromatic polyamide multifilament yarns impregnated with a hydrolytically stable polyurethane resin to form a protective coating. The coating provides load adjustment from fiber to fiber, eliminates abrasive self-destruction of the fibers during flexing of the yarn under load, protects the fiber to some extent from ultraviolet radiation, aggressive chemicals or abrasive particles and makes it possible to preform the yarn. The coating comprises a reaction product of a liquid tetramethylene glycol, an aliphatic/cycloaliphatic diisocyanate and a diamine coupling-curing agent. The impregnated yarns are dried, twisted together, heated above the softening point of the resin to fuse the coatings of adjacent yarns, and then cooled to form a set twisted helix of the yarns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.