METHODS FOR THE PREPARATION OF A FRICTION MATERIAL AND FOR THE MANUFACTURING OF A BRAKE PAD USING SUCH FRICTION MATERIAL

• Main Authors: GALIMBERTI, PAOLO, SIN XICOLA, AUGUSTÌN
• Format: Patent
• Language: English; French; German
• Published: 09.11.2016
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; BLASTING; BRAKES; CHEMISTRY; CLUTCHES; COMPOSITIONS BASED THEREON; COUPLINGS FOR TRANSMITTING ROTATION; ENGINEERING ELEMENTS AND UNITS; FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; GENERAL PROCESSES OF COMPOUNDING; HEATING; LIGHTING; MAKING GRANULES OR PREFORMS; MECHANICAL ENGINEERING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PAPER-MAKING; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; PRODUCTION OF CELLULOSE; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; THERMAL INSULATION IN GENERAL; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WEAPONS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

Method for manufacturing an asbestos-free friction material comprising as component materials inorganic and/or organic and/or metallic fibers, at least one organic binder, at least one friction modifier or lubricant and at least a filler or abrasive, wherein the raw components of the friction material are mixed together in order to obtain a raw mixture which is then molded in order to obtain a block or layer of friction material; the mixing step includes a first step of hot blending of at least part of the organic binder with at least part of the other components of the friction material by a rolling mill blender that is open to atmospheric pressure at a temperature lower than the polymerization temperature of the organic binder but greater than or equal to its softening temperature, in order to obtain a semifinished solid product; and a grinding step of the semifinished solid product in order to reduce it to a powder.