Abstract: The present invention relates to a friction material having a fibrous base material as a primary layer and a secondary layer comprising a mixture of carbonaceous material and friction modifying particles on at least one surface of the primary layer for use as an anti-shudder friction material.

Abstract: A friction material comprising a filler, a binder, and a lubricant, wherein a part or the whole of the filler is constituted by molybdenum trioxide. Not only is the friction material improved in anti-cracking property and anti-fading property under high-temperature and high-load conditions, but the friction material can be prevented from deterioration due to ashing.

Abstract: Disclosed is an organic friction material composition useful to produce any kind of friction linings, such as brake linings or clutch linings, that have to be capable of withstanding high operating temperatures and pressures for substantial periods of time. The composition comprises a thermosetting resin having heat resistant properties, and a fibrous-like synthetic forsterite obtained by calcination of chrysotile asbestos fibers at a temperature of from 650.degree. C. to 1450.degree. C., the synthetic forsterite having an MgO: SiO2 ratio lower than 1.1, a raw loose density of from 3 to 40 pounds per cubic foot, a thermal conductivity K factor of from 0.25 to 0.40 BTU. in/hr. .degree.F.ft.sup.2 and a fusion point of from 1600.degree. to 1700.degree. C., the weight ratio of resin to synthetic forsterite ranging from 0.25 to 0.70.

Abstract: A friction brake material contains fibers, graphite and a binder. All or part of the graphite is physically combined with one or more metals or alloys which are softer than steel to form a first combination or mixture. A separate combination or mixture is formed to include friction increasing fibers in a binder. Both mixtures are then combined to form the friction brake material which has an ability to cause substantially less creaking noise upon brake application as compared to differently prepared friction brake material.

Abstract: A friction material comprising 40 to 95% by volume of a granular material and a thermoset binder resin for binding said granular material, said granular material having been produced by binding at least one powder material with a binder resin so that at least 50% by weight of the granules has a particle size between 140 mesh on and 7 mesh pass, which has good fade resistance and wear resistance.

Abstract: A friction brake material contains fibers, graphite and a binder. All or part of the graphite is physically combined with one or more metals or alloys which are softer than steel to form a first combination or mixture. A separate combination or mixture is formed to include friction increasing fibers in a binder. Both mixtures are then combined to form the friction brake material which has an ability to cause substantially less creaking noise upon brake application as compared to differently prepared friction brake material.

Abstract: The compositions of friction element for molding and the friction element for molding formed from the composition characterizing by addition of any one or more than two of the cermet powder (A) contained 75-50% of the mixed carbon and 25-50% of the alloy of stainless and iron series, the cermet powder (B) contained 75-50% of the mixed carbon and 25-50% of the alloy of tungsten and iron and/or the alloy of molybdenum and iron series or the cermet powder (E) of 75-50% of the mixed carbon and 25-50% of metal iron series, in range of 15-50%.

Abstract: A composition of material for use as a friction material in a brake and its method of manufacture. Liquid double salts of dibasic and monobasic (ammonium-potassium hydrogen) phosphoric acid (DSP) is added to a dry mixture of reinforcing fiber, friction modifiers, fillers and phenolic resin to create a high viscosity slurry. Thereafter, a metallic (magnesium) oxide and para formaldehyde (para) are added to the slurry. Molds which have been previously heated are filled with the slurry and any excess removed. The metallic oxide reacts with the DSP and the para reacts with the phenolic resin to create a two binder matrix for holding the reinforcing fiber, friction material and fillers in a fixed relationship corresponding to the shape of a brake pad. The brake pads are removed from the molds and transported to a ventilated chamber where the internal curing proceeds at or near ambient temperature to complete the manufacture of the brake pad.

Abstract: Method for the production of friction linings, in which a mixture of fibers and wetting agents with water, in a fiber:water-mixture ratio from about 1:3 to 1:7, in the presence of plastifying components, is homogenized, the so formed plastic mass is shaped into a formed body, the formed body is dried, and then strengthened and hardened under heat and pressure. According to a variation, additives are first intensively mixed in after homogenization of the mixture containing fibers, wetting agent, plastifying component and water. The plastifying component may be a pectin, a polysaccharide, a vegetable glue or a viscose solution, in particular algin or gum arabic. Moreover, the plastifying component may be a colloid, in particular an aqueous colloid. It may also be a fiber colloid. In that case, it is preferred for the fiber colloid content to be greater than about 30% by weight.

Abstract: A wet friction material composition for use in clutches, brakes and the like is composed of a resilient binder comprising a fluoroelastomer. The friction material is characterized by containing a significant amount of wollastonite as a filler, which unexpectedly alters the ratio between the dynamic and static coefficients of friction exhibited by the friction material during actual use.