| 摘要 |
PURPOSE:To provide a non-asbestos friction material which contains no asbestos, is harmless and can be produced safely, prepd. by blending a binder into a specified mixed base fiber and hot forming the mixt. CONSTITUTION:A mixt. of short carbon fiber and short aromatic polyamide fiber having a carbon fiber content of about 10-30wt% is disintegrated in water and a filler (e.g. rock wool or powdered metallic copper) is added to it when necessary. An aqueous emulsion which contains a binder consisting of novolac type resin in powder, resol type liquid resin and synthetic rubber latex and having a solid content of about 10% or lower is added to the resultant slurry having a fiber concn. of about 4-5%. Then a metal salt is added to it for fixation of the binder onto the base fiber and the mixt. is formed into desired shape, followed bu drying and pressing under heat to obtain the aimed non-asbestos friction material. |
