32results about How to "Does not affect wear resistance" patented technology

The invention relates to the technical field of rubber and particularly relates to a preparation method of a tire tread composite material with high wet and skid resistance. The composite material is characterized by containing the following materials in parts by weight: 100 parts of dienes rubber (concretely including styrene butadiene rubber, butadiene rubber, natural rubber, integrated rubber and a composite of the integrated rubber), 50-80 parts of stuffing (concretely including carbon black, white carbon black and a composite of the white carbon black), 0-6.4 parts of silane coupling agent, 0.5-3 parts of silicon carbide,10-40 parts of plasticizer, 2-5 parts of zinc oxide, 1-3 parts of stearic acid, 2-4 parts of anti-aging agent, 2-4 parts of accelerant and 1-3 parts of sulphur. By adoption of the material prepared by the method, the rolling resistance of a tire can be reduced, the wear-resisting property of the tire tread is not affected simultaneously, and especially, the wet and skid resistance of the tire is greatly increased by utilizing the nano silicon carbide material.

The invention provides a highly wear-resistant bio-based polyamide composite material and a preparation method thereof. The bio-based polyamide composite material contains polyamide resin and a wear-resisting agent. Production raw materials of the polyamide resin comprise pentanediamine and diacid. A weight ratio of the polyamide resin to the wear-resisting agent is 100: 0.5-25. The preparation method comprises the following steps: at least mixing the polyamide resin and amino polysiloxane at room temperature; and successively carrying out extrusion granulation at 220 to 300 DEG C, cooling and drying so as to obtain the highly wear-resistant bio-based polyamide composite material. The polyamide composite material provided by the invention has good mechanical properties and wear resistance; the wear-resisting agent amino polysiloxane does not influence the color of the polyamide composite material and poses no restriction to application occasions of the polyamide composite material; and the the preparation method provided by the invention has the advantages of easiness, low cost and accordance with production requirements of industrialization.

The invention discloses a wear-resistant glaze for glazed bricks, and a preparation method thereof. The wear-resistant glaze is prepared from raw glaze powder, No.1 frit powder and No.2 frit powder, wherein the raw glaze powder comprises, by weight, 8-12% of kaolin, 10-18% of calcined kaolin, 12-20% of quartz, 12-20% of dolomite, 8-15% of calcined talc, 8-15% of nepheline, 5-10% of zinc oxide, 3-6% of barium sulfate and 6-12% of strontium carbonate. The raw materials of the No.1 frit powder comprise zircon sand and barium sulfate, and raw materials of the No.2 frit powder comprise kaolin, calcined talc, fluorite and barium sulfate. The glaze disclosed by the invention contains barium sulfate, so that the color development condition can be improved, the problem of color difference of red and yellow ceramic ink-jet inks during firing of a product is avoided, and the transparency of the wear-resistant glaze is improved under the condition that the hardness and the wear resistance are notinfluenced.

The inventive copper alloy wear-resistant material and manufacturing method thereof relate to the field of metal wear-resistant materials, aiming at solving the technical problems of high content of precious metals, high manufacturing cost, high price and prominent influence of production mode on the wear resistance of the copper alloy wear-resistant material, in the production field of the conventional copper alloy wear-resistant material. The inventive copper alloy wear-resistant material comprises the following ingredients based on weight ratio: 54%-57% of Cu, 3%-5% of Al, 3.5%-5.5% of Mn, 0.5%-1.3% of Si, 0.7-1.5% of Fe, not more than 1% of impurities, and Zn as the balance. The invention is suitable for the production field of alloy wear resistant material.

Provided is an automobile pneumatic tire such that the tire weight and rolling resistance can be greatly decreased without detracting from necessary tire performance. In a pneumatic tire, at least one layer of a carcass layer is installed between a pair of bead portions, a bead core is embedded in each bead portion, at least one layer of a reinforcement layer is disposed on an outer periphery side of the carcass layer, and a tread rubber layer is layered on the outer periphery side of the reinforcement layer. When a pair of first boundary lines is defined that passes a point of intersection of an extension of a side arc forming a tread profile and an extension of a shoulder arc and orthogonal to a tire inner surface, a pair of second boundary lines is defined passing a rim check line and orthogonal to the tire inner surface, a first region is partitioned between the pair of first boundary lines, a second region is partitioned between the first boundary lines and the second boundary lines, a third region is partitioned closer to a bead toe than to the second boundary lines, the first to the third regions have cross sectional areas (mm2) of SA, SB, and SC, respectively, and the first to the third regions respectively have periphery lengths (mm) of a, b, and c along the tire inner surface, the relationships 7.5 <= SA/a <= 11.5 and 2.0 <= SB/b <= 6.0 are satisfied with respect to the ratios SA/a and SB/b.

The invention relates to a heat treating method for a driving roll and a driving gear of a rolling mill. The heat treating method comprises the following steps: I insulating the driving roll in a salt bath furnace at the temperature of 980 DEG C-1080 DEG C for 40-50 minutes, then suspending into quenching oil with the temperature of 20 DEG C-80 DEG C for cooling, cooling the roll to the temperature below 120 DEG C, II putting the driving roll into a nitrate furnace with the temperature of 510 DEG C-600 DEG C for tempering three times, wherein each time lasts 3.5-5 hours, air cooling after the first two times tempering, performing the third tempering after cooling the temperature of roll lower than 60 DEG C; cooling to the room temperature after performing the third tempering; III carrying out a partial high-temperature tempering to the driving gear of the tempered roll, immersing the whole driving gear into the nitrate furnace with the temperature of 560 DEG C-680 DEG C for 1-4 hours and then oil cooling, cooling the roll to the temperature below 40 DEG C. According to the invention, the driving gear processed by the heat treatment method has high impact resistance.

The invention discloses a high-flowability nylon composite material, which is prepared from nylon, a heat conduction wear-resistant filling material, a first flowability enhancing agent and a second flowability enhancing agent, wherein the first flowability enhancing agent is nanometer ultrafine talcum powder; the heat conduction wear-resistant filling material is prepared from aluminum hydroxide,nanometer particulate alpha-Al2O3 and magnesium hydroxide. The invention discloses a preparation method of the high-flowability nylon composite material. The method comprises the following steps of proportioning and mixing the nylon, the heat conduction wear-resisting filling material, the first flowability enhancing agent, the second flowability enhancing agent, a coupling agent, an antioxidantand a lubricating agent to obtain a mixed material; adding the mixed materials into a double-screw extruder for fusion plasticization; then, adding glass fiber into a mold head of the double-screw extruder for extrusion; performing cooling, palletization and drying to obtain the high-flowability nylon composite material. The high-flowability nylon composite material provided by the invention has good flowability; in addition, the mechanical strength is unchanged; the high heat conduction, flame-retardant and wear-resistant performance is realized; the preparation method is simple; the cost islow.

The invention relates to the technical field of coatings, and particularly discloses a sand-in-water coating and a preparation method thereof. The sand-in-water coating comprises, by weight, 20-30 parts of a protective glue, 50-60 parts of a toning base paint and 15-25 parts of a continuous phase. The sand-in-water coating has the advantages of strong adhesive force, high toughness, good wear resistance and good weather resistance, and a film formed by the coating can achieve the natural effect and beauty of marble textures.

The embodiment of the invention discloses a manufacturing method of a watchcase. The manufacturing method of the watchcase comprises the steps that a copper blank is machined according to an electroforming dimension and a matching position, so that a higher-precision blank is obtained; the higher-precision blank is electroformed through a pure gold electroforming process to make sure that an electroforming sedimentary layer of the electroformed blank is less than 0.5 mm, so that the watchcase is formed; gold or other precious metal is used during electroforming; the watchcase is machined according to the requirements for an assembly dimension, the matching position and the like; after nitric acid is heated to be boiled, the machined watchcase and the nitric acid are completely dissolved toform copper nitrate and are washed with water, then protective copper on the inner wall of the machined watchcase is heated and dissolved with sulfuric acid, and the watchcase is cleaned with water and then is dried to obtain a workpiece; and the workpiece is polished, so that the surface of the polished workpiece is glossy. By adopting the manufacturing method of the watchcase in the embodimentof the invention, the watchcase with light weight and good manufacturing precision can be manufactured.

The invention provides nano composite antibacterial powder and application thereof in a ceramic tea set. The nano composite antibacterial powder comprises nano metal oxide, silver-doped nano bismuth tungstate and a silver-loaded antibacterial agent. The invention also provides an antibacterial and antiviral glaze, an antibacterial and antiviral tea set and a preparation method of the antiviral tea set. The nano composite antibacterial powder disclosed by the invention has good antibacterial and antiviral properties through the synergistic effect of the nano metal oxide, the silver-doped nano bismuth tungstate and the silver-loaded antibacterial agent. the ano composite antibacterial powder is added into ceramic glaze, and after spraying and calcining, blank glaze with antibacterial and antiviral effects can be formed on the surface of a tea set, so that the overall antibacterial effect of the tea set is realized, the antibacterial time is relatively long, and the strength, wear resistance and appearance of the tea set are not influenced; and the preparation method of the antibacterial and antiviral tea set is simple, efficient, energy-saving and environment-friendly, does not need an additional treatment process, and is very high in application value.

The invention relates to a novel temperature-adjustable intelligent military training clothing system device. The device comprises a temperature adjusting module, a sensor and a displayer which are arranged on a clothing coat and trousers. The temperature adjusting module comprises a structural temperature adjusting module and a chemical temperature adjusting module. For the structural temperatureadjusting module, an air-permeable mesh fabric is arranged on the corresponding part of clothing, for the chemical temperature adjusting module, a temperature-adjusting fabric containing phase-changematerials is arranged on the corresponding part of the clothing, the sensor comprises a temperature and humidity sensor arranged on the corresponding part of the clothing, a contact end, a heart ratesensor, a respiratory rate sensor and a blood pressure sensor. Relevant parameters are divided according to the security level and displayed on the displayer. By means of the temperature adjusting module, the sensor and the displayer, the temperature-adjustable intelligent military training clothing system device can adjust the local temperature of a human body, monitor and display physiologicaldata of the human body in real time, and issue a warning when the relative value exceeds the security level range, and safe, comfortable and intelligent wearing experience is provided for the human body.

The invention relates to tire tread rubber with low rolling resistance, belonging to the technical field of a tire rubber formula. The tire tread rubber comprises 2-5 parts of natural rubber, 3-6 parts of styrene-butadiene rubber, 0.1-0.5 part of phenolic resin, 1-2 parts of epoxy resin, 2-4 parts of stearic acid, 2-4 parts of wax, 1-3 parts of an anti-aging agent, 21-35 parts of carbon black N330, 2-7 parts of white carbon black, 0.5-1 part of sulfur, 1.5-2.5 parts of an accelerating agent, 15-35 parts of aromatic oil and 4-15 parts of hard clay. By virtue of reasonable formula combination, the proportion of carbon black in the system is reduced, the rolling resistance of a finished product of a tire in use can be greatly reduced, and the wear resistance of the tire tread can not be influenced.

The invention discloses high wear resistance aluminium bronze and a manufacturing method thereof. The high wear resistance aluminium bronze is made from QAl10-4-4 as raw materials, and finally obtained after the processes of solid solution, hot water cooling, cold treatment, aging heat preservation and spheroidizing and slow cooling treatment. The strengthening phase in the high wear resistance aluminium bronze is of the spheroidized state. The high wear resistance aluminium bronze has uniform structure, high hardness, good abrasive resistance, and spheroidized structure.

The invention relates to a comb-tooth grate bar of a comb-tooth sieve plate used for sieving a material. The grate bar consists of a substrate made of a macromolecular elastic material, an abrasion-resistant composite layer, a fixed steel plate vulcanized in the root of the comb-tooth grate bar and the like, wherein the abrasion-resistant composite layer is on the upper part of a comb-tooth part,is adhered to the substrate and is provided with a big end up taper hole; and the hole is filled with a substrate material and is connected with the substrate to form a whole. The abrasion-resistant composite layer is made of ceramics or a hard alloy abrasion-resistant material; the inside of the macromolecular elastic material on the lower part of the abrasion-resistant composite layer is vulcanized with a spring steel wire; and one end of the spring steel wire is 2 to 20 mm away from the edge of the abrasion-resistant grate bar. The lateral surface of the abrasion-resistant composite layer has a big end up obliqueness, and a part of the lower part is coated by the macromolecular elastic material. The comb-tooth sieve plate manufactured by the abrasion-resistant comb-tooth grate bar provided by the invention is good in abrasion resistance and difficult in causing a falling-off problem of the composite layer, so the service life of the sieve plate can be prolonged greatly, and meanwhile a sieve hole of the sieve plate is difficult to be blocked. Thus, the abrasion-resistant grate bar has good popularization and application prospects.

The invention provides a pneumatic tire for an electric two-wheeled vehicle. The tread patterns arranged on the two sides of the tread are symmetrical about the center plane of the tire and are staggered in the circumferential direction of the tire, and each tread pattern comprises a bent main groove, an inclined main groove and a center anti-skid suction cup; the inclined main grooves are arranged at intervals in the circumferential direction of the tire; bent main grooves are formed between the adjacent inclined main grooves in the circumferential direction. The bent main groove is formed by mutually connecting at least two sections of grooves, the inclined main groove is a disconnected two-section type groove and is formed by diagonally arranging an upper groove and a lower groove in a staggered manner, and the outer endpoint of the rear grounding end of the upper groove is overlapped with the inner endpoint of the front grounding end of the lower groove; the center anti-skid suction cups are close to the center plane of the tire and arranged in the circumferential direction of the tire at intervals, and each center anti-skid suction cup comprises a concave arc disc and at least two rotating ladders arranged at the bottom of the arc disc at intervals along the arc outline of the center anti-skid suction cup. The pneumatic tire does not influence wear resistance, rolling resistance performance and drainage performance on a dry land, and can effectively prevent stone from being clamped and improve the problem of slipping on a wet land.

The invention belongs to the technical field of pre-coating liquid for transparent polyimide hardened films, and particularly relates to pre-coating liquid for a transparent PI hardened film resistantto ultraviolet damp-heat aging and application of the pre-coating liquid. The pre-coating liquid is prepared from the following components in parts by weight: 100 parts of low molecular weight resin,50-100 parts of a strong polar monomer, 1-5 parts of a thermal initiator, 0.05-1 part of a leveling agent and 1000-1500 parts of a solvent. The pre-coating liquid contains a proper amount of low-molecular-weight resin and a strong-polarity monomer, and the low-molecular-weight resin and the strong-polarity monomer are matched with each other, so that the pre-coating liquid can permeate into the transparent PI base material, permeate and bite the transparent PI base material alternately, and the pre-coating layer is firmly attached to the surface of the base material through curing crosslinking, thereby enhancing the adhesive force between the hardened coating and the transparent PI base layer. The composition of the pre-coating liquid determines that a good binding force exists between the pre-coating layer and the hardened layer, so that the ultraviolet and damp-heat resistance of the PI hardened film is improved, and the comprehensive properties such as hardness and wear resistanceof the hardened layer are not influenced.

The invention provides a high-performance double-layer PET film which comprises a PET base material and an anti-scraping wear-resistant layer coating the PET base material. The anti-scraping wear-resistant layer comprises 30-50 wt% of epoxy acrylate, 2-8 wt% of polyether acrylate, 30-40 wt% of trimethylol propyl triacrylate, 10-20 wt% of neopentyl glycol diacrylate, 1.5-2.5 wt% of BaSO4 and 2-6 wt% of photoinitiator. BaSO4 is first subject to surface treatment through SiO2. By selection of an appropriate diluent, epoxy acrylate serves as a main body prepolymer to be crosslinked with polyether acrylate and filled with inorganic particle barium sulfate, a prepared coating has good performance of adhering to base material PET, the obtained double-layer PET film is excellent in various mechanical properties, and development of the high-performance organic film is promoted.