Patents Assigned to T&N Research Ltd.
  • Patent number: 4631209
    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.
    Type: Grant
    Filed: August 8, 1985
    Date of Patent: December 23, 1986
    Assignees: Ferodo Ltd., T&N Research Ltd.
    Inventors: Ralph Baker, Eric T. Smith, Vaughan T. Dickinson, Noel C. McKenzie, Brian Hargreaves