Two-layered metal cord rubberized in situ by an unsaturated thermoplastic elastomer
US9617662B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 14, 2012 |
| Grant date | Apr 11, 2017 |
| Priority date | — |
| Expiry date | Sep 19, 2033 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD07B2501/2046
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A metal cord has an M+N construction with two concentric layers. An internal first layer or core includes M wire(s) of diameter d1, M having a value from 1 to 4. An external second layer includes N wires of diameter d2 and is positioned around the core, the N wires being wound in a helix. Between the wires of the two layers are gaps, some or all of which include a filling rubber based on an unsaturated thermoplastic elastomer. The filling rubber may be, for example, based on an SBS or an SIS block copolymer. When used in a molten state, the thermoplastic elastomer presents no problem due to unwanted stickiness if the filling rubber overspills outside the cord after manufacture. The unsaturated and therefore (co)vulcanizable nature of the thermoplastic elastomer makes it compatible with diene rubber matrices used as calendering rubber in metal fabrics intended for reinforcing tires.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.