Manufacture of asbestos-free friction facing material
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United States of America Patent
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-
Dec 23, 1986
Grant Date -
N/A
app pub date -
Aug 8, 1985
filing date -
Aug 30, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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