Preparation technology method of friction material for clutch facing

Abstract

The invention discloses a preparation technology method of a friction material for a clutch facing. Activated potassium feldspar, micron-scale carbon powder, cashew nut shell oil modified phenolic resin and butyronitrile resin are mixed and compounded, and hot-press molding is carried out. According to the preparation technology method of the friction material for the clutch facing, the high-specific-heat potassium feldspar is selected as a filler, after being activated by oxalic acid, the crystal lattice structure of the potassium feldspar is looser but stacking is compact, the edges of the particles become rough, then the potassium feldspar is subjected to organic activation modification through a coupling agent, the compatibility of the potassium feldspar and a resin substrate is improved, due to the fact that the potassium feldspar has relatively high specific heat capacity, the thermal decomposition of the resin substrate can be effectively reduced, and the thermal decay resistance performance of the resin-based friction material is effectively improved; and in addition, the micron-scale carbon powder is selected as the reinforcing agent, the low particle size enables airtightair holes generated in the pressing process of the material to be well filled with the carbon powder, the friction material is more compact, so that the wear rate is gradually reduced, the anti-thermal expansion performance is good and the friction performance is excellent.

Description

technical field [0001] The invention relates to the technical field of friction materials, in particular to a preparation process for a friction material for a clutch face. Background technique [0002] Resin-based friction composite materials are widely used in automotive braking and transmission fields such as brake pads, brake shoes, brake linings, friction blocks, and clutch faces. Organic materials will thermally decompose above 200°C, and the frictional force of the car will cause the surface temperature of the material to reach 500°C instantly, resulting in the decomposition of the organic resin and the decline of the friction performance of the brake pads, that is, the phenomenon of thermal decay. How to improve the thermal decay resistance of resin-based friction materials has always been a research hotspot. Modifying the resin, reducing the mass fraction of organic resin in the friction material, and adding metal fillers with high thermal conductivity to the fricti...

AI Technical Summary

Problems solved by technology

How to improve the thermal decay resistance of resin-based friction materials has always been a research hotspot. Modifying the resin, reducing the mass fraction of organic resin in the friction material, and adding metal fillers with high thermal conductivity to the friction material can all improve the performance of the resin to a certain extent. The thermal fading resistance of resin-based friction materials, but these studies cannot fundamentally solve the thermal fading resistance of resin-based friction materials