A preform for a carbon-carbon composite including a plurality of fibrous layers stacked and needled-punched together to form the preform in the shape of an annulus having an inner radial section and an outer radial section. Each fibrous layer includes a respective plurality of fabric segments comprising at least one of carbon fibers or carbon-precursor fibers. At least one fibrous layer includes a first fabric segment forming at least a portion the inner radial section, the first fabric segment defining a first segment bisector and a first fiber orientation angle, and a second fabric segment forming at least a portion the outer radial section, the second fabric segment defining a second segment bisector and a second fiber orientation angle, where the first and second segment bisectors are radially aligned and the first fiber orientation angle is different than the second fiber orientation angle.

An anti-shock and ventilated grip strap includes a strap body including a substrate and a cushion layer overlapping the substrate. Each of the substrate and the cushion layer is in a form of a strap. The strap body has a hardness in the range of 40-70 in ASTM D2240 Type C hardness scale. A plurality of elastic members is disposed on and protruding away from the cushion layer. The plurality of elastic members is arranged separately from one another. Each of plurality of elastic members has a hardness greater than the substrate and greater than the cushion layer of the strap body.

A mouse pad structure includes a bottom pad, a second cloth and a first cloth. The bottom pad is a rubber pad of flat shape and has an upper surface and a lower surface located oppositely. The second cloth is attached on the upper surface. The first cloth is made of waterproof cloth and combined on the second cloth. Thus, the mouse pad can have effects of anti-fouling and waterproof.

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.

The present disclosure discloses a sliding bearing comprising a fluorination-treated bonding layer, the sliding bearing comprising a sliding layer, a backing layer and a bonding layer with at least one fluorination-treated surface. The present disclosure further provides a method for preparing said sliding bearing. While maintaining bonding stren gth between sliding layer and backing layer in the sliding bearing, the present disclosure provides a bonding layer of a lower content of fluorine and thereby minimizes the cost of raw materials and influences to the environment.

An abrasive article is provided which comprises a plurality of layers in the following order: a backing; an abrasive layer; a primer layer comprising clay particles, wherein the clay particles are agglomerated and form a layer; and a supersize coat comprising a metal salt of a long-chain fatty acid. The addition of the aforementioned primer layer can significantly reduce loading of swarf and improve both the cut and expected lifetime of the abrasive article.

Various embodiments disclosed relate to an article. The article includes a first layer defining a first major surface of the article. The first layer includes a plurality of protrusions extending outwardly from the first major surface. The protrusions comprise an elastic polymer component. The article further includes a second layer opposite the first layer, which at least partially defines a second major surface of the article. The first layer is disposed over a range of about 5% surface area of the second layer to about 99% surface area of the second layer. The first layer and the second layer are in direct contact.

An elevator maintenance kit is provided for surfacing an elevator sheave that engages with an elevator tension member. The kit includes a substrate with an adhesive backing, and a substrate applicator that is operable to apply the substrate to the sheave as the sheave is rotated. The adhesive backing is operable to attach the substrate to the sheave during the sheave rotation.

A rotary wing aircraft bearing that provides a constrained relative motion between a first rotary wing aircraft member and a second rotary wing aircraft member. The bearing includes an elastomeric mold bonded laminated bearing stack, the elastomeric mold bonded laminated bearing stack including a plurality of mold bonded alternating layers of nonelastomeric shim member layers and elastomeric shim members layers, the alternating layers having an exterior surface and an interior center distal from the exterior surface. At least one of the elastomeric shim members layers has an interior elastomer region distal from the exterior surface, the interior elastomer region formed an interior cured elastomer composition having at least a first interior optical characteristic ingredient, and an exterior elastomer region encompassing the interior elastomer region, the exterior elastomer region proximate the exterior surface, the exterior elastomer region formed from an exterior cured elastomer composition having at least a second exterior optical characteristic ingredient, the at least second exterior optical characteristic ingredient different than the interior cured elastomer composition first interior optical characteristic ingredient, wherein with an elastomer void crack propagating from the exterior surface inward towards the interior elastomer region and a repeated rotary wing aircraft relative motion between the first rotary wing aircraft member and the second rotary wing aircraft member generates a plurality of interior cured elastomer composition crumbs to be expelled from the elastomer void, the interior cured elastomer composition crumbs optically distinguishable from the exterior cured elastomer 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 so 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 is 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.