Friction material comprising aramid
US10774892B2 · kind B2 · utility
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4References
14Claims
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Key dates
| Filing date | Aug 22, 2017 |
| Grant date | Sep 15, 2020 |
| Priority date | — |
| Expiry date | Sep 4, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2200/0095
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A friction paper including filler, para-aramid pulp, and resin, characterised in that the para-aramid pulp includes 0.1 to 10 wt. % of polyvinyl pyrrolidone (PVP), the paper having a grammage in the range of 100 to 800 g/m2. It has been found that the use of a PVP-containing para-aramid pulp leads to improved friction performance as compared to the use of para-aramid pulp not containing PVP. Effects obtained include improved friction properties, improved strength properties, and improved filler retention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.