Manufacture of asbestos-free friction facing material
US4631209A · kind A · utility
2Cited by
8References
2Claims
0Family size
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Key dates
| Filing date | Aug 8, 1985 |
| Grant date | Dec 23, 1986 |
| Priority date | — |
| Expiry date | Aug 8, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2200/0095
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In a method of making asbestos-free friction facing material in the form of a water-laid sheet of cellulosic fibres, in which are distributed friction-imparting particles and particles of friction-modifier, the sheet containing a thermosetting phenolic resin which after curing binds the ingredients firmly together, the thermosetting phenolic resin is included in emulsified form in the aqueous suspension of ingredients from which the water-laid sheet is prepared. This leads to a product of more consistent friction performance than is obtained by post-sheeting impregnation with thermosetting phenolic resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.