Pelletizable fiber blends are provided, as well as pelletized fibers formed therefrom, and methods of preparing them. The pelletizable fiber blends include short fibers and a binder. The pelletized fiber blend is useful to prepare polymer composites and rubber compositions.

A rubber compound for use in a stator in a positive displacement motor. The rubber compound includes a fiber reinforcement, wherein fibers in the fiber reinforcement create a grain direction in which “with the grain” is generally orthogonal to “across the grain”. In some embodiments, the rubber compound has a first value for 25% tensile Modulus across the grain and a second value for 25% tensile Modulus with the grain, wherein the first value is at least 10% lower than the second value. In such embodiments, the fiber reinforcement may further include a fiber loading of greater than 5.0 phr of fibers. In such embodiments, the rubber compound may further have a 25% tensile Modulus of greater than 400 psi across the grain and a 50% tensile Modulus of greater than 700 psi across the grain.

A rubber compound for use in a stator in a positive displacement motor. The rubber compound includes a fiber reinforcement, wherein fibers in the fiber reinforcement create a grain direction in which “with the grain” is generally orthogonal to “across the grain”. In some embodiments, the rubber compound has a first value for 25% tensile Modulus across the grain and a second value for 25% tensile Modulus with the grain, wherein the first value is at least 10% lower than the second value. In such embodiments, the fiber reinforcement may further include a fiber loading of greater than 5.0 phr of fibers. In such embodiments, the rubber compound may further have a 25% tensile Modulus of greater than 400 psi across the grain and a 50% tensile Modulus of greater than 700 psi across the grain.

A rubber compound for use in a stator in a positive displacement motor. The rubber compound includes a fiber reinforcement, wherein fibers in the fiber reinforcement create a grain direction in which “with the grain” is generally orthogonal to “across the grain”. In some embodiments, the rubber compound has a first value for 25% tensile Modulus across the grain and a second value for 25% tensile Modulus with the grain, wherein the first value is at least 10% lower than the second value. In such embodiments, the fiber reinforcement may further include a fiber loading of greater than 5.0 phr of fibers. In such embodiments, the rubber compound may further have a 25% tensile Modulus of greater than 400 psi across the grain and a 50% tensile Modulus of greater than 700 psi across the grain.

The invention relates to fluoropolymer composites having a fluoropolymer matrix containing a functionalized fluoropolymer composition, and reinforced with fibers. The fibers can be chopped fibers, long fibers, or a mixture thereof, and the fluoropolymer matrix preferably is based on polyvinylidene fluoride. Any type of fibers, sized or unsized may be used with the functionalized fluoropolymer matrix composition to form the fluoropolymer composite.

The invention relates to fluoropolymer composites having a fluoropolymer matrix containing a functionalized fluoropolymer composition, and reinforced with fibers. The fibers can be chopped fibers, long fibers, or a mixture thereof, and the fluoropolymer matrix preferably is based on polyvinylidene fluoride. Any type of fibers, sized or unsized may be used with the functionalized fluoropolymer matrix composition to form the fluoropolymer composite.

A method for preparing a compact of resin compound comprising the following steps (a) to (c): (a) a preparation step of mounting a sheet-shaped or block-shaped compact of resin compound including a resin composition, which contains a filler having magnetic anisotropy and is solidified by curing or by being advanced to a B-stage, on a transportation unit which is movable in the horizontal direction, and covering at least a top surface of the compact of resin compound with a cover material; (b) a step of applying a magnetic field to the compact of resin compound obtained in the step (a) with a bulk superconductor magnet having a central magnetic flux density of 1 T or more; and (c) a step of moving the compact of resin compound in the horizontal direction and scanning it while applying vibrations to the compact of resin compound mounted on a region of a central part of the bulk superconductor magnet under application of a magnetic field.

A method for preparing a compact of resin compound comprising the following steps (a) to (c): (a) a preparation step of mounting a sheet-shaped or block-shaped compact of resin compound including a resin composition, which contains a filler having magnetic anisotropy and is solidified by curing or by being advanced to a B-stage, on a transportation unit which is movable in the horizontal direction, and covering at least a top surface of the compact of resin compound with a cover material; (b) a step of applying a magnetic field to the compact of resin compound obtained in the step (a) with a bulk superconductor magnet having a central magnetic flux density of 1 T or more; and (c) a step of moving the compact of resin compound in the horizontal direction and scanning it while applying vibrations to the compact of resin compound mounted on a region of a central part of the bulk superconductor magnet under application of a magnetic field.

The presently claimed invention relates to aramid pulp comprising a plurality of fibrils having a coating of polyalkyleneimine disposed thereon. The presently claimed invention further relates to a method of coating the aramid pulp with polyalkyleneimine. The presently claimed invention also relates to a rubber composition comprising the coated aramid pulp and rubber as well as to a method for preparing the rubber composition.

The presently claimed invention relates to aramid pulp comprising a plurality of fibrils having a coating of polyalkyleneimine disposed thereon. The presently claimed invention further relates to a method of coating the aramid pulp with polyalkyleneimine. The presently claimed invention also relates to a rubber composition comprising the coated aramid pulp and rubber as well as to a method for preparing the rubber composition.