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171results about How to "Increase coefficient of friction" patented technology

Calcium carbonate whisker reinforced resin-rubber base friction material and preparation method therefor

The present invention discloses a calcium carbonate whisker reinforced resin-rubber base friction material, and a preparation method therefor. The material comprises: 10-15 parts of liquid nitrile rubber-modified phenolic, 5-10 parts of styrene-butadiene rubber, 0-25 parts of calcium carbonate whisker, 10-20 parts of steel fiber, 0-8 parts of sepiolite fiber, 0-8 parts of mineral fiber, 0-3 parts of aramid fiber, 5-8 parts of barium sulfate, 5-10 parts of magnesium oxide, 2-3 parts of aluminum oxide, 5-10 parts of flake graphite, 1-5 parts of carbon black, 5-10 parts of petroleum coke, and 3-7 parts of friction powder. The preparation method of the calcium carbonate whisker reinforced resin-rubber base friction material comprises steps of such as material collocation, ban burying, crushing, pressing molding, immobilization processing, cooling, and packaging. Brake pads prepared by the invention, tested by an MM1000-III type friction and wear testing machine, have excellent friction and wear performance and stable braking performance, is safe and environmentally-friendly, and also has the advantages such as good stability of friction coefficient, low wear rate and high heat-resistant property.
Owner:广西碳酸钙产业化工程院有限公司 +2

Environment protection device for building construction

The invention relates to protection devices for building construction and particularly relates to an environment protection device for building construction. A technical problem to be solved by the invention is to provide the environment protection device for building construction which is timesaving and laborsaving and is good in dust falling effect and wide in spraying range. In order to solve the above-mentioned technical problem, the environment protection device for building construction, provided by the invention, comprises a bottom plate and the like, wherein a moving device is arrangedon the bottom plate, supporting legs are mounted at the top of the bottom plate in bilateral symmetry in a bolted manner, a top plate is horizontally connected to the tops of the supporting legs in abolted manner and is provided with a water spraying device, a supporting rod is vertically connected to the middle of the top of the top plate in a bolted manner, and a water spraying component of the water spraying device is located at the top of the top plate. According to the environment protection device for building construction, provided by the invention, through sliding fit between a sleeve and the supporting rod, the vertical position of a sprayer can be very conveniently adjusted, and then, the range of water spraying of the sprayer is adjusted, so that the dust falling effect is better, and the effects of good dust falling effect and wide spraying range are achieved.
Owner:陈鸿基

Friction material for clutch driven disc and preparation method of friction material

The invention discloses a friction material for a clutch driven disc and a preparation method of the friction material. The friction material is prepared from the following raw materials in percentage by mass: 14% of cashew nut shell oil modified phenol-formaldehyde resin, 7% of butyronitrile rubber powder, 4.6% to 12% of basalt fibers, 4.6% to 12% of steel fibers, 4.6% to 12% of potassium titanate whiskers, 21% of barium sulfate powder, 12% of graphite, 6% of vermiculite, 5% of aluminum powder, 7% of barite and 4% of brown alumina, wherein the total mass percent of all the ingredients is 100%. The method comprises the steps of weighing the materials according to the formula, then, carrying out uniform mixing, then, carrying out dry-process one-step hot briquetting, and carrying out heat treatment postprocessing, thereby preparing the friction material. The friction material has the characteristics of high-temperature resistance, wear resistance, impact resistance and good heat fade resistance; the preparation process is simple, the problems that similar friction materials are high in wear rate, unstable in coefficient of friction, relatively low in impact strength, and the like at high temperatures are effectively solved, and the performance requirements of enterprise production can be excellently met.
Owner:WUHAN UNIV OF TECH
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