In some examples, a method includes depositing a mixture including a resin and an additive powder via a print head of a three-dimensional printing system to form a carbon fiber preform including a plurality of individual carbon fiber layers, wherein each individual layer of the plurality of individual carbon fiber layers includes a plurality of carbon fibers and the mixture of the resin and the additive powder.

A shaped material (1, 1), for example a disk for a disk brake, preferably a ventilated disk, includes a plurality of layers of material (6) in a spiral shape, overlapping along a development axis (X). Each layer of material (6) it is formed by a fabric (2) predominantly or exclusively made of carbon fibres (8), at least part of the layers being impregnated by an impregnating agent. A method is for the manufacture of a shaped material.

A method of making a friction pad comprising applying a soft bonding layer and a traction layer to a support sheet. The pad is easily exchangeable, non-fouling to its surroundings, and soft to bare skin.

A pulley contacting portion of a friction transmission belt is made of a rubber composition containing an EPDM mixture as a rubber component. The EPDM mixture as the rubber component includes a first EPDM with an ethylene content of 67% by mass or more and a second EPDM with an ethylene content of 57% by mass or less. A content of the second EPDM in the EPDM mixture is larger than a content of the first EPDM in the EPDM mixture. An average ethylene content of the EPDM mixture is 54% by mass or more and 59% by mass or less.

The present invention relates to: a method for manufacturing a polymer film, the method including a base film forming step for co-extruding a first resin containing a polyamide-based resin and a second resin containing a copolymer including polyamide-based segments and polyether-based segments; a co-extruded film including a base film including a first resin layer containing a polyamide-based resin, and a second resin layer containing a copolymer having polyamide-based segments and polyether-based segments; to a co-extruded film including a base film including a first resin layer and a second resin layer, which have different melting points; and to a method for manufacturing a polymer film, the method including a base film forming step including a step of co-extruding a first resin and a second resin, which have different melting points.

A composite sliding member includes a combination of a fiber woven fabric and a resin member, wherein the fiber woven fabric is a multilayer woven fabric having a front surface layer serving as a sliding surface and a rear surface layer adhered to the resin member, the front surface layer mainly including a fluororesin fiber and the rear surface layer mainly including a heat resistant fiber; wherein when a cross section of the composite sliding member crossing the fiber woven fabric, the resin member, and their composite interface is observed, one heat resistant fiber A of such heat resistant fiber at a position adjacent to the resin member with no intervening other fiber in the cross section is observed, and a ratio of a number of monofilaments in the heat resistant fiber A not in close contact with the resin constituting the resin member or adjacent monofilaments in relation to a number of all monofilaments constituting the heat resistant fiber A is R1, and R1 is 0 to 70%.

A method for manufacturing a brake pad preform for disc brakes is provided. The method involves preparing a thermosetting mixture by mixing a polymer resin in liquid form or particle powder form and ceramic particles in powder form, combining the thermosetting mixture with a carbonaceous material composed of carbon fibers to obtain a molding compound, molding the molding compound by compaction and heat treatment to obtain a crude preform, and subjecting the crude preform to a pyrolysis treatment to obtain the brake pad preform. A brake pad preform or a brake pad obtained by the manufacturing method is composed of a carbon-carbon composite composed of a matrix of carbonaceous material and carbon fibers in which the ceramic particles are uniformly dispersed in the matrix of carbonaceous material.

The present disclosure provides a composition. The composition contains (A) an ethylene-based polymer; and (B) a slip agent blend, the slip agent blend containing (i) from greater than 50 wt % to 99 wt % of a first polydimethylsiloxane having a number average molecular weight (Mn) from 30,000 g/mol to less than 300,000 g/mol; and (ii) from 1 wt % to less than 50 wt % of a second polydimethylsiloxane having a number average molecular weight (Mn) from 300,000 g/mol to 2,000,000 g/mol, based on the total weight of the slip agent blend. The present disclosure also provides a film with a layer containing said composition.

Resilient members having near-surface architectures including microstructures for controlling friction are provided. A film-terminated array of fibrils having a sharp film/fibril juncture exhibits an unexpectedly large enhancement of adhesion, static friction and sliding friction. The enhancement is provided against rough indenters. A film-terminated array of elongated ridges and valleys unexpectedly exhibits low adhesion, and an unexpectedly large enhancement of sliding friction. The film-terminated ridge/valley design provides an anisotropic structure with direction-dependent frictional properties. The increase in sliding friction force varies as a function of interfibrillar spacing, and corresponds to a mode in which buckling of the terminal film occurs. The near surface architectures may be designed with varying scales and varying parameters to provide performance characteristics tailored to various applications. By way of example, the film-terminated ridge/valley array may be incorporated in motor vehicles tires to provide low rolling resistance and high sliding friction allow for high-performance braking during vehicle operation.

A system for continuous process manufacturing of composite friction units uses one or more array gates with a plurality of cutouts each sized to receive one of a plurality of reinforcing fiber fabric therethrough. The system also uses a resin plenum with plenum chamber and a plurality of dispensing tube assemblies. Each of the plurality of dispensing tube assemblies corresponds to a different cutout and includes dispensing bores positioned to dispense resin onto one of the reinforcing fiber fabrics. The system also uses a forming die that receives the reinforcing fiber fabrics with the resin to form a composite panel as they pass through the forming die.