Wrinkling of a contoured composite laminate part during forming to contour is reduced by using laminate plies having off-angle reinforcing fibers that provide the part with primary axial strength along a major axis of loading.

A wood or engineered wood structural panel, such as, but not limited to, OSB (“oriented strand board”) or plywood, that is both fire-resistant and water resistant. The panel is factory-coated with a product that provides fire resistance. The treatment gives it a Fire-Resistant (FR) performance (for use in a one- or two-hour rated assembly). The panel also is overlaid or coated in a factory setting with a weather/water resistive barrier (WRB). The structural panel thus combines a fire-resistant structural sheathing and WRB product in one integrated panel produced at a factory prior for installation at a job site.

The present disclosure discloses a fiber structure, including a plurality of fiber layers. The plurality of the fiber layers are stacked and arranged in a surrounding manner and are impregnated and cured in sequence. The fiber structure of the present disclosure is high in structural strength and low in mass. The present disclosure further provides a gymnastic apparatus force bearing frame, including the above-mentioned fiber structure, which is beneficial to reducing the weight of the gymnastic apparatus force bearing frame, facilitating the movement, transportation, disassembling, and assembling of the apparatus, and reducing the labor burden of an operator.

An at least three-layer biaxially oriented polyester film is provided that includes a layer B, a rough outer layer A and a smooth outer layer C, with the outer layers A and C each being external layers arranged on the opposite surfaces of the base layer B. The outer layer A includes polymethylsilsesquioxane-based particles, the outer layer C includes less than 0.1% by weight of particles different from the polymethylsilsesquioxane-based particles. The polyester film contains no 2,6-naphthalenedicarboxylic-acid-derived units as repeat unit, and the film includes less than 0.1% by weight of particles. The polyesters in the outer layers comprise isophthalic acid-derived repeat units in an amount of <19% by weight. The invention further relates to a process for to produce the film and to its use as process film for the transfer of surface properties, especially for furniture surfaces.

An at least three-layer biaxially oriented polyester film is provided that includes a layer B, a rough outer layer A and a smooth outer layer C, with the outer layers A and C each being external layers arranged on the opposite surfaces of the base layer B. The outer layer A includes polymethylsilsesquioxane-based particles, the outer layer C includes less than 0.1% by weight of particles different from the polymethylsilsesquioxane-based particles. The polyester film contains no 2,6-naphthalenedicarboxylic-acid-derived units as repeat unit, and the film includes less than 0.1% by weight of particles. The polyesters in the outer layers comprise isophthalic acid-derived repeat units in an amount of <19% by weight. The invention further relates to a process for to produce the film and to its use as process film for the transfer of surface properties, especially for furniture surfaces.

A helmet having an energy absorbing layer, an outer layer that is harder than the energy absorbing layer and a plurality of outer plates mounted on the outer surface of the outer layer is provided. The outer plates on the outer layer can slide across the outer layer. A low friction interface between the outer surface of the outer layer and at least a part of the outer surface of the outer plates contacts the outer surface of the outer layer under an impact.

A helmet having an energy absorbing layer, an outer layer that is harder than the energy absorbing layer and a plurality of outer plates mounted on the outer surface of the outer layer is provided. The outer plates on the outer layer can slide across the outer layer. A low friction interface between the outer surface of the outer layer and at least a part of the outer surface of the outer plates contacts the outer surface of the outer layer under an impact.

A composite stretch film for agricultural use is formed by bonding two stretch films together with an adhesive through hot rolling or UV curing such that primary stretch directions thereof cross each other. The composite stretch film of the present invention is significantly improved not only in transverse and longitudinal tensile strength but also in transverse and longitudinal tear strength. Therefore, it is able to meet the requirements for use in agriculture with a lesser thickness and hence reduce the use cost. In particular, in case of the composite stretch film being made of a polyester material, it further offers the advantages such as high-light transmittance which changes mildly with time, better thermal insulation properties and better humidity-regulating capabilities. In particular, in case of it being made of a degradable polyester materials, it will further offer profoundly significant benefits in terms of energy saving and environmental protection.

Embodiments of the present invention relate to composite materials. In one embodiment, a composite material comprises an inorganic ceramic matrix comprising a first surface and a second surface opposite the first outer surface and generally parallel to the first outer surface. At least one open weave fiber glass fabric is disposed in the inorganic ceramic matrix between the first surface and the second surface. In another embodiment, a composite material comprises a first inorganic ceramic matrix comprising pieces of stone, a second inorganic ceramic matrix attached adjacent to the first inorganic ceramic matrix, and at least one open weave fiber glass fabric disposed in the second inorganic ceramic matrix.

A surface-reinforced bitumen roofing membrane includes at least two layers, namely 1) a bitumen compound layer, and 2) a fiber mat, and can optionally include a) an optional bleed blocker layer that is located between the bitumen compound layer and the fiber mat, b) an optional liquid applied coating that partially or fully encapsulates the fiber mat, c) an optional release liner that is releasably positioned on the bottom surface of the bitumen roofing membrane, and/or d) an optional release film that is releasably positioned on the fiber mat surface.