Production method for clutch surface adopting formaldehyde-phenol resin as cementing compound

Abstract

The invention discloses a method for making a clutch facing by using phenolic resin as adhesive. The method comprises the following steps that: (1) the latex modified water soluble phenolic resin is used as the adhesive to make the clutch facing, and water is used as solvent, and the adhesive and the solvent are mixed by stirring and prepared into pulp; (2) fibers are impregnated in the pulp; (3) fibers containing the pulp are dried; (4) the dried fibers containing the pulp are wound to become blanks; (5) blanks are heat moulded; (6) the clutch facing is obtained after subsequent treatments. The method of the invention has the advantages of saving a large amount of organic solvent, avoiding the environmental pollution caused by the consumption and the volatilization of the solvent, greatly saving the energy used for the preparation of the pulp and saving equipment cost on aspects of safety, fire fighting and environmental protection and management cost; moreover, the clutch facing made by the method of the invention is excellent in performance.

Description

technical field [0001] The invention relates to a production method of using phenolic resin as an adhesive to prepare a clutch face, in particular to a production method of using a modified phenolic resin as an adhesive and a wet process to prepare a clutch face. Background technique [0002] At present, the use of wet process to manufacture clutch face is still the mainstream technology of domestic clutch face manufacturers. The process flow of wet process manufacturing clutch face is as follows: (1) stirring and mixing phenolic resin, rubber, filler and solvent to prepare a slurry; (2) impregnating continuous fibers in the slurry; (3) mixing Continuous fiber drying of slurry; (4) winding the dried fiber containing slurry into blank; (5) hot-pressing the blank on a press and a mold; (6) heat treatment, end grinding Cutting, punching or drilling, that is, to make the finished clutch face. Wherein, an organic solvent needs to be used in the process of preparing the slurry, ...

AI Technical Summary

Problems solved by technology

Usually, the ratio of adhesive (phenolic resin and rubber) to solvent is 1: (2~3), therefore, a large amount of organic solvents need to be consumed in the manufacture of clutch faces by wet process

In addition, these solvents volatilize into the air, which will cause great environmental pollution

Although a solvent recovery device can be used, the solvent recovery device can only recover part of the solvent, and 20% to 50% of the solvent still evaporates into the air

In addition, the solvent recovery unit will lead to higher investment costs and higher operating costs

Although it is also possible to use unmodified water-soluble phenolic resin to make clutch face sheets, the process is unstable, and the continuous fibers after impregnating the slurry and drying are very poor in flexibility, and the dried slurry is very easy to fall off from the fibers, and , the prepared clutch surface is also too brittle, easy to crack during punching or drilling, and easy to crack during use, which cannot meet the normal use requirements