36results about How to "Good rebound characteristics" patented technology

A multi-piece solid golf ball has a solid core obtained by molding and vulcanizing a rubber composition which includes (A) a base rubber containing a polybutadiene synthesized using a rare-earth catalyst, (B) an unsaturated carboxylic acid and / or a metal salt thereof, (C) an organic sulfur compound, (D) an inorganic filler and (E) an organic peroxide. The core is enclosed within a mantle of one or more layer which is made primarily of a thermoplastic resin and has a Durometer D hardness of 30 to 70. The mantle is enclosed within a cover which is made primarily of a thermoplastic polyurethane and which has a Durometer D hardness of 40 to 60 that is lower than the Durometer D hardness of the outermost layer of the mantle. This construction provides the golf ball with an outstanding rebound.

The present invention provides a golf ball having excellent rebound characteristics and flight performance, while maintaining good durability and appearance. The present invention relates to a golf ball comprising a center, an intermediate layer and a cover, the intermediate layer comprises an outermost layer and a second layer adjacent to the underside of the outermost layer, and the cover has many dimples on the surface thereof, wherein the second layer is formed from thermoplastic resin and has a thickness of 0.5 to 2.0 mm, the outermost layer is formed from thermosetting or thermoplastic resin and has a thickness of 1 to 100 μm, the intermediate layer has depressions on the surface thereof at the position and shape corresponding to the dimples through the cover, and the cover is formed from thermoplastic resin and has a thickness of 0.1 to 0.8 mm in land portion having no dimple.

The invention discloses a high-hardness high-rebound polyurethane elastomer material and introduces an application thereof. The material is obtained by mixing an isocyanate component and a polyhydric alcohol component at the temperature of 25-40 DEG C according to the weight ratio of 100:(50-100), pouring into a mould of 40-60 DEG C and vulcanizing for 30-60min. The hardness is 86-93A, the rebound rate is greater than 70%, the abrasion is smaller than 20mg, the tensile strength is greater than 25MPa, and the tearing strength is greater than 100kN / m. The isocyanate component is a performed polymer with the content of 6-18% of isocyanic acid radicals, and the performed polymer is generated in such a way that 20-60% of PTMG with the molecular weight smaller than or equal to 1,000 and 40-80% of doped PTMG with the molecular weight greater than 1,000 react with isocyanate or a derivative thereof; the polyhydric alcohol component comprises 69.2-89.4% of PTMG with the average molecular weight greater than 1000, 10-30% of fatty group dihydric alcohol, 0.2-0.3% of catalyst and 0.4-0.5% of antiaging agent. The polyurethane elastomer material can be used for preparing butterfly boards, active boards, pulleys used for rapid slide, pulleys of ice skates, pulleys of sliding boards and various castors.

The present invention provides a golf ball having excellent rebound characteristics and excellent flight performance, while maintaining good durability and good appearance. The present invention relates to a golf ball comprising a core composed of a center and at least one intermediate layer formed on the center, and a cover covering the. core, and having many dimples on the surface thereof, wherein the outermost layer of the intermediate layer is formed from thermoplastic resin, has a thickness of 0.5 to 3.0 mm, and has depressions on the surface thereof at the position and shape corresponding to the dimples through the cover, and the cover is formed from thermoplastic resin and has a thickness of 0.1 to 0.8 mm in land portion having no dimple.

A mixture having good thermal stability, flow and moldability and suitable as a golf ball-forming material is obtained when a base resin comprising a (metal ion-neutralized) olefin-unsaturated carboxylic acid-unsaturated carboxylate ternary random copolymer and optionally a (metal ion-neutralized) olefin-unsaturated carboxylic acid binary random copolymer is blended with specific proportions of a fatty acid and / or fatty acid derivative and a basic inorganic metal compound capable of neutralizing acidic groups left unneutralized in the base resin and fatty acid. Using the same material, high-rebound golf balls can be effectively manufactured.

An insulated composite fabric that includes an inner fabric layer, an outer fabric layer, and an insulating-filler fabric layer enclosed between the inner fabric layer and the outer fabric layer. The insulating-filler fabric layer is a textile fabric with a raised surface on at least one side of the fabric.

The invention discloses a piezoresistive sensor with a porous structure and a preparation method thereof. The piezoresistive sensor structure comprises, in order from the outside to the inside, a flexible protective layer, an electrode sheet and a pressure sensitive sensing layer, wherein the pressure sensitive sensing layer is a foam structure formed by mixing and foaming Ecoflex used as a substrate and acetylene black used as a conductive phase by using rice wine and starch, and has a sensitivity up to 0.272 kPa-1 in the total pressure sensitive range. The piezoresistive sensor and the preparation method thereof are novel and simple, have excellent performance and low cost, and have great potential and advantages in the field of biomedical detection and robotics.

The invention discloses a vibrating membrane used for a sounding device and a sounding device. The diaphragm includes an isoprene rubber film layer. The isoprene rubber film layer is a film layer prepared by isoprene polymer through cross-linking reaction. The isoprene polymer is represented by the following general formula: Isoprene rubber is a synthetic rubber prepared by polymerization of isoprene monomer. Compared with engineering plastics, isoprene rubber has better rebound properties. At room temperature, isoprene rubber exhibits a high elastic state, and no yield strain will occur in a large strain range. The vibrating membrane made of this material not only has a larger effective vibration range, but also can make the loudness of the sounding device higher under the same driving power.