A brake pad having a surface coating operable to enhance the bedding-in process during normal operation. The surface coating may be formulated using one or more materials found in a friction lining of the brake pad. The surface coating may be formulated using only non-metal materials.

A method for producing a multi-layered wet friction material includes providing a bottom layer, providing a top layer produced independently of the bottom layer from different materials, and bonding the bottom layer to the top layer. The bottom layer and the top layer may be produced from different formulations and supplied as raw papers. A formulation of the top layer may include twenty to sixty percent (20%-60%) filler, ten to forty percent (10%-40%) wood pulp, five to ten percent (5%-10%) aramid, and twenty-five to thirty-five percent (25%-35%) phenolic resin. A formulation of the bottom layer may include ten to fifty percent (10%-50%) filler, ten to forty percent (10%-40%) wood pulp, five to ten percent (5%-10%) aramid, five to fifteen percent (5%-15%) carbon, and twenty-five to thirty-five percent (25%-35%) phenolic resin.

A method of making a fibrous preform in carbon and/or fibres of a carbon precursor may include superposing at least two layers of carbon fibres and/or fibres of a carbon precursor according to a predefined superposition axis Z so as to form a multilayer body. The method may also include needle-punching via least one first needle-punching device the multilayer body in a needle-punching direction substantially parallel to the superposition axis Z to arrange at least part of the fibres parallel to the superposition axis Z, so as to obtain a needle-punched multilayer body. An optional step may include superposing with each other according to the superposition axis Z two or more of the needle-punched multilayer bodies, obtained separately by applying the above steps.

A sliding bearing includes a backing layer, a bonding layer with at least one fluorination-treated surface, and a sliding layer. A method for preparing the sliding bearing includes performing a fluorination treatment on a surface of the bonding layer, placing a surface of the bonding layer on a surface of the backing layer, and placing a surface of the sliding layer on a surface of the bonding layer to form a laminated assembly, heating and pressurizing the laminated assembly, and cooling the laminated assembly in a pressurized state.

A watercraft board traction system includes a base layer having a upper surface and a bottom surface, the bottom surface of the base layer including an adhesive layer configured to adhesively attach to the board. The system further includes a traction layer having an upper surface and a bottom surface, the upper surface of the traction layer having a plurality of traction elements. The system further includes a fastener system having a bottom portion coupled with the upper surface of the base layer and a top portion coupled with the bottom surface of the traction layer, the fastener system being configured to releasably fasten the traction layer to the base layer when the base layer is adhesively attached to the board, the fastener system enabling repositioning and/or reorienting the traction layer relative to the base layer when the traction layer is fastened to the base layer.

A system and method for a grinding disc, the grinding disc made out of three discs, capable of grinding in three positions such as the bottom, side, and top instead of only one position, the top disc and middle disc having an aperture such that a shaft having a washer and bar is connected to the discs by sliding the through the top disc whereby the washer is then received by the middle disc, the discs are then fastened together with the bar protruding from the discs whereby the bar may be connected to a tool such as drill, the grinding disc may then be used at multiple angles when connected to the tool.

An NBR composition for rubber laminated metal, having 1 to 3 parts by weight of sulfur and 1 to 15 parts by weight of a disulfide compound such as 4,4-dithiodimorpholine or dithiocaprolactam represented by the general formula RN-S-S-NR (wherein RN is a cyclic linking group formed together with the N atom bonded to the S atom), based on 100 parts by weight of NBR. The rubber composition that can improve the protrusion properties of a rubber layer when used for, for example, a gasket or a brake shim material that is a laminated composite metal laminated with another metal plate.

A method of making a wet friction material includes providing an outer layer on a base layer to form the wet friction material. The base layer includes a first proportion of fiber material and a first proportion of filler material. The outer layer includes a second proportion of fiber material and a second proportion of filler material. The second fiber proportion is less than the first fiber proportion and the second filler proportion is greater than the first filler proportion. The method further includes forming a modified outer layer by burning off the fiber material of the outer layer.

A bearing including a substrate layer including an aluminum alloy including a thickness, T.sub.S, where T.sub.S0.6 mm; an adhesive layer; and a low friction material layer overlying the adhesive layer, where the bearing includes an elongation at break, A.sub.50, of 23%.

A wet running friction lining includes a plastic matrix, which contains at least one filler. The wet running friction lining contains bentonite as a filler.