935results about How to "Low wear resistance" patented technology

The invention provides an UV curing coating, a wear-resistant and antifouling coating layer and a mobile phone protection film containing the wear-resistant and antifouling coating layer. The coating comprises, in parts by weight, 10-95 parts of a first prepolymer, 5-60 parts of a second prepolymer, 0.05-8 parts of a polysilazane-based polymer, 0.05-8 parts of a fluorine-containing aid, 1-15 parts of a photoinitiator and 100-300 parts of a solvent, wherein the first prepolymer is a urethane acrylate prepolymer with a functionality degree of 4-8; the second prepolymer is an acrylate prepolymer with a functionality degree of 9-18. The wear resistance of the coating layer formed after curing the UV curing coating can be improved by the first prepolymer and the second prepolymer with high functionality degrees, improvement for the wear resistance of the coating layer and prolonging for the service life of the coating layer are benefited due to the adding of the polysilazane-based polymer and a polar compound, and the good antifouling performance of the coating layer can be ensured, and the reduction of the antifouling performance of the coating layer can be suppressed due to the fluorine-containing aid. The coating layer has both good antifouling performance and wear resistance.

The invention relates to an anti-reflection coating and a super-hydrophobic self-cleaning anti-reflection coating and a preparation method thereof. The anti-reflection coating is formed by a SiO2 ball-shaped nanoparticle layer with the particle size of 10-100 nm, and the surface of the coating has a rough structure. The super-hydrophobic self-cleaning anti-reflection coating is formed by providing a low surface energy substance on the surface of the anti-reflection coating, and the surface of the low surface energy substance has a rough structure. The coatings are obtained by using layer-by-layer electrostatic self-assembly technique. The light transmittance of the glass coated with the super-hydrophobic self-cleaning anti-reflection coating can increase to 99.1 from 91.3%, and the single-side reflectivity of the glass can reduce lowest to 0.3%. Compared with a solar cell coated with a common glass flake, a standard mono-silicon solar cell panel coated with a glass with the super-hydrophobic self-cleaning anti-reflection coating can utilize solar energy more effectively, and the efficiency can be improved to more than 6.6%.

The invention discloses a superhigh intensity wear-resistant steel and the manufacturing method, which belongs to the manufacturing field of low alloying steels, according to percentage by weight, the chemical components of the steel are that C 0.10-0.17%, Si 0.25-0.50%, Mn 1.20-1.50%, P<=0.018%, S<=0.008%, Cr 0.20-0.05%, Ni0.25-0.50%, Mo 0.10-0.40%, Als 0.02-0.06%, B<=0.005%, RE<=150g/t, and the allowance is Fe and unavoidable impurities, and the content of carbon is Ceq(%)<=0.60, Ceq(5)=C+Mn/6+(Mo+Cr+V)/5+(Ni+Cu)/15. The specific method for producing the steel comprises the following steps: smelting ultra-pure steel, desulfurizing molten iron, compounding and converting the top and the bottom of a converter, doing vacuum treatment, feeding rare earth (RE) silk through a crystallizer, casting into bar plates, heating the bar plates, roughing, planishing, air cooling or feeding middle pressure, water cooling, quenching and tempering steel plates. V does not contain in the chemical components of the steel, inner stress of steel is low, steel welding property is improved, and steel has excellent abrasion resistance and ultra-high strength and toughness properties, which is beneficial for popularization and application.

A method for producing a diaper of the present invention includes the steps of: folding back a first strip-shaped portion 13 and a second strip-shaped portion 23; successively forming pairs of first and second belts 1 and 2 by cutting first and second separate webs W1 and W2; placing pairs of the first and second belts 1 and 2 at a predetermined interval P in a carrying direction Y of a continuous piece; temporarily attaching the first and second belts 1 and 2 to a portion of the continuous piece to be a back portion; fixing the belts 1 and 2 to the continuous piece; and severing the continuous piece with the belts 1 and 2 fixed thereon at a predetermined pitch into individual diapers.

The invention discloses an Ausferrite ductile cast iron grinding ball, and relates to a spherulitic graphite-contained cast iron alloy. The Ausferrite ductile cast iron grinding ball comprises the following chemical elements in percentage by mass: 3.3-3.7% of C, 2.0-3.0% of Si, 1.0-2.5% of Mn, 0.7-3.0% of Cr, 0.1-1.0% of Mo, 0.1-1.0% of Cu, 0.04-0.08% of P, 0.01-0.020% of S, 0.03-0.05% of Mg, 0.02-0.04% of Ce, 0.03-0.07% of B, 0.06-0.12% of Ti, 0.03-0.2% of V, and the balance of Fe. The Ausferrite ductile cast iron grinding ball is prepared by the steps of preparation and smelting of raw materials, spheroidizing treatment, inoculation treatment and microalloying treatment, and isothermal quenching heat treatment. The Ausferrite ductile cast iron grinding ball overcomes the defects of low production efficiency and high consumption of electric energy of a ball mill due to easy surface stripping and crushing and shorter fatigue life of an existing grinding ball product in the service process.

A mold extruder for a tire with a highly electrically conductive ring and a manufacturing method using the same. The extruder solves the problem of static electricity caused by failure to discharge charges generated in a vehicle body, to the ground, but accumulating charges on the tire when a large amount of silica is used into the tread rubber composition of a tire. The mold extruding die for forming a conductive ring on the tread extrudes a cap tread, an under tread, and tread wings simultaneously, is installed to a head section of a mold extruder having a tri-extruder for extruding a tire tread, and includes a preform die, a final die, and a cassette. The extruding passages for the cap tread, the under tread, and the tread wings are formed by assembling the preform die, the final die, and the cassette. By designing a conductive ring passage for the extruding passage of the under tread to penetrate the extruding passage of the cap tread, the under tread rubber composition protrudes so as to divide a space of the cap tread extruding passage by the conductive ring passage penetrating the cap tread into a right-side space and a left-side space. For the purpose of easily protruding the under tread rubber composition to an upper end of the cap tread through the conductive ring passage, a triangular recess on a ceiling of the under tread extruding passage penetrates the cap tread extruding passage from a rear side to a front side is formed.

The invention discloses a large-diameter high-speed cutting and high-speed heavy load grinding resin wheel prepared from the following three components in percentage by weight: 60-72 percent of grinding materials, 18-25 percent of filling materials and 8-18 percent of resin, wherein the grinding materials in the wheel are film-coating calcined brown fused alumina, the filling materials comprise a heat conducting material and an active filling material, and the resin comprises a phenolic resin liquid and phenolic resin powder. The sand is produced by adopting the film-coating calcined brown fused alumina, which has good heat conduction property of metal plating, obviously strengthens the heat radiating effect of the wheel and prolongs the abrasive resistance and the service life of the wheel. In addition, the grinding materials have improved ball-milling flexibility after calcined, which enables the wheel to be durable and the property to be better. The wheel can be used for cutting hot-wire type steel with a diameter of over 100 mm or grinding the steel in a high-speed and heavy load way, and has long service life reaching 100-120min.

The invention relates to a flame retardant polyurethane composite material and a preparation method thereof. The traditional flame retardant polyurethane foamed material has a poor use effect. The flame retardant polyurethane composite material provided by the invention is a mixed system comprising 70-99wt% of flame retardant polyurethane and 1-30% of blending type fire retardant, wherein the blending type fire retardant is one or more than one of ammonium polyphosphate, melamine, melamine cyanurate acid, polysiloxane, graphine, a carbon nano tube and kaolin, the fire retardant polyurethane is a random copolymer consisting of a polycarbonate unit, a polyether and an isocyanate unit. The preparation method of the flame retardant polyurethane composite material comprises the following steps of: firstly, preparing fire retardant polyalcohol; then, mixing the fire retardant polyalcohol and the blending type fire retardant into a mixed system; and then adding polyisocyanates into the mixed system and reacting to finally obtain the flame retardant polyurethane composite material. The flame retardant polyurethane composite material prepared by using the preparation method disclosed by the invention has the advantages of excellent fire retardance, low-fogging performance and low-gas-releasing performance.

The invention specifically relates to an antistatic abrasion-resistant UV coating and a preparation method thereof, and belongs to the field of materials. The antistatic abrasion-resistant UV coating comprises the following components in percentage by mass: 5 to 35 percent of multifunctional polyurethane acrylate, 15 to 45 percent of epoxy acrylate, 10 to 40 percent of reactive diluent, 2 to 12 percent of photoinitiator, 0.5 to 3 percent of other additives, 5 to 25 percent of conductive nano-attapulgite powder, and 0.05 to 0.5 percent of silane coupling agent. The coating of the invention has an appearance of white liquid or light yellow liquid; the surface resistance of a coat prepared by the coating of the invention is 4.8*10<6> to 6.5*10 <8> ohms; the 100-revolution weight loss in the Taber abrasion resistance test is 0.0045 to 0.0075 gram; and the surface hardness is more than or equal to 3 H; and the coating does not change after dipping in 5 percent sodium hydroxide for 24 hours. The antistatic abrasion-resistant UV coating of the invention has the advantages of simple preparation, low cost, convenient use, good effect and wide application prospect.

The screen deck for sieving apparatus is made of ceramic material or comprises one ceramic surface layer and one bottom reinforcing layer. The screen deck has screen holes in certain geometric shape. The present invention also discloses one kind of combined screen plate with screen decks assembled onto the frame. The screen plate has high wear resistance, low cost, long service life and capacity of local replacement, and is used in different kinds of industrial sieving apparatus.

The invention relates to a mullite silicon carbide complex-phase fireproof material and a preparation method thereof. The mullite silicon carbide complex-phase fireproof material is characterized in that 48-60wt% of coating cladding mullite light aggregate, 9-15wt% of coating cladding silicon carbide aggregate, 6-12wt% of top-grade bauxite fine powder, 4-8wt% of andalusite fine powder, 3-5wt% of alpha-Al2O3 micro powder, 4-8wt% of Guangxi white clay, 1-3wt% of SiO2 micro powder, 4-6wt% of Si powder and 0.5-2wt% of Al powder are used as raw materials. The preparation method comprises the following steps of firstly mixing two kinds of the aggregate in the raw materials, adding a bonding agent, then performing mixed refining on the mixed aggregate, the bonding agent and other raw materials, performing material trapping, performing compression moulding, performing drying, and performing baking under the condition of 1250-1400 DEG C so as to obtain the mullite silicon carbide complex-phase fireproof material. The mullite silicon carbide complex-phase fireproof material prepared by the preparation method disclosed by the invention has the excellent characteristics of being low in heat conduction coefficients, good in erosion resistance, and high in intensity.

The invention discloses an electrophoretic aluminum alloy building proximate matter with high performance and a preparation method thereof, and belongs to the technical field of aluminum alloy application. The electrophoretic aluminum alloy building proximate matter consists of following ingredients by mass: 0.5 to 0.54 percent of Mg, 0.4 to 0.44 percent of Si, 0.04 to 0.08 percent of RE, 0.01 to 0.02 percent of Ti, 0.002 to 0.004 percent of B, 0 to 0.2 percent of Fe and remaining aluminum. The preparation method of the electrophoretic aluminum alloy building proximate matter consists of following steps: a misch metal ingot, an alloy of Al, Ti and B, and a pure aluminum ingot are smelted into a refining and modifying agent of RE, Al, Ti and B; the refining and modifying agent is added during an alloy smelting process and cast into an aluminum rod; the electrophoretic proximate matter with high performance is prepared by techniques of squeeze aging and oxidizing electrophoresis, etc. By utilizing rare earth to subdivide second-phase particles, electrophoretic paint films of the proximate matter that are obtained by improving surface processing performance have higher uniformity, adhesive attraction, wear resistance, corrosion resistance and large film thickness than common proximate matters, and can be widely used for aluminum alloy doors and windows of buildings and curtain walls.

Earth-boring tools comprise a face and a plurality of cutting elements disposed on at least a portion of the face. An impact material is positioned on at least one portion of the body and has a relative exposure equal to or greater than at least some of the cutting elements of the plurality of cutting elements. The impact material comprises a material having a lower abrasion resistance than the body. Methods of making and methods of using such earth-boring tools are also disclosed.

The invention provides a silane coupling agent-modified epoxy resin. The structural formula of the epoxy resin is represented by formula (I). The invention further provides an epoxy protective paint including the silane coupling agent-modified epoxy resin. A preparation method for the silane coupling agent-modified epoxy resin is simple; after a reaction of the silane coupling agent-modified epoxy resin with an amine curing agent, the structure of the molecular chain of the cured resin is stable, compatibility between the epoxy resin and the interface of a pigment is high, and the strength of the cured resin is slightly reduced; and the epoxy protective paint prepared from the silane coupling agent-modified epoxy resin has the advantages of good film glossiness, good toughness, high bonding strength on a substrate, good resistance to chemicals, environment friendliness, moderate cost, etc.

Provided are an artificial hip joint friction pair surface film layer and a preparation method thereof. The artificial hip joint friction pair surface film layer is characterized by being sequentially composed of a substrate (1), a metal layer (2), a metal nitride layer (3), a metal carbonitride layer (4), a metal carbide layer (5) and a metal-mixed diamond layer (6). The preparation method sequentially includes the steps of washing the substrate with ion beams and depositing the metal layer, the metal nitride layer, the metal carbonitride layer, the metal carbide layer and the metal-mixed diamond layer. The artificial hip joint friction pair surface film layer greatly reduces friction coefficient of a friction pair bulb and the acetabulum, reduces abrasion of a metal base body and release of metal ions, prolongs service life of the artificial hip joint, and resolves the failure problem of joint implanting of the artificial hip joint caused by joint head mortar abrasion and abrasive dust. Tests for simulating the human environment show that the artificial hip joint has excellent chemical inertness and biocompatibility, and is free of harmful tissue reaction and allergic reaction and high in safety.

The present invention relates to methods for the restoration of a decayed portion of an anterior tooth or re-restoration of a previously filled anterior tooth, and to dental matrices and composite resin dispensers that may be used in the methods for the restoration of a decayed portion of an anterior tooth

The invention discloses alloy steel SDH55 for shield machine tools and a production method thereof. The alloy steel comprises, by weight, 0.4% to 0.55% of C, 0.10% to 0.40% of Si, 0.10% to 0.30% of Mn, 5.10% to 6.50% of Cr, 2.20% to 3.00% of Mo, 0.45% to 0.85% of V, the balance of Fe and unavoidable impurity elements, including not greater than 0.005% of S and not greater than 0.010% of P. The alloy steel high in wear resistance and high in toughness is made by means of matching, smelting, casting and electroslag remelting, by thermal feeding for high-temperature homogenous treatment after demolding, and by means of multidirectional forging, soft annealing and ultra-fining treatment; the problem that the current tools for shield machines are of short lives due to wear and failure and edges cracking caused by low toughness is solved; the alloy steel is of great significance to the development of the industry of special steels of shield machine tools.

There is disclosed a member for office machines which comprises a core body and an annular elastic body installed on the peripheral surface thereof, wherein the expansion rate of the annular elastic body E(%) falls within the range of 5 to 30%, when expressed by the formulawherein d1 in mm is the diameter of the core body, or a longest value in the cross-section of the core body in the shape of a roller or odd-shape; and d2 in mm is the inside diameter in mm of the annular elastic body before being installed on the peripheral surface of the core body. The member for office machines enables stable and steady paper sheet feeding, when used as a paper feeding member in electrophotographic equipment and electrostatic recording equipment, and equipment having a variety of paper feeding mechanisms such as ink-jet printers, automatic teller machines (ATM), money exchange machines, counting machines, automatic vending machines and cash dispensers (CD).

The invention relates to a wear-resistant super-hydrophilic anti-reflecting coating. The wear-resistant super-hydrophilic anti-reflecting coating disclosed by the invention is characterized in that: by using the advantages that a SiO2 surface is good in hydrophilicity and a silica film is lower in reflectivity, high in light transmittance and good in wear-resisting performance and the like, a rough-structured surface structure is constructed through a SiO2 spherical nanoparticle layer consisting of nanoparticles with particle sizes of about 10-40 nm, and the coating has super-hydrophilicity. The contact angle of water on the glass surface of the coating is 0 degree, and the light transmittance of sheet glass coated with the coating is increased from 91.3% to 99.0%. When water drops on the surface of glass coated with the coating, a droplet is flattened rapidly and uniformly and then evaporated without leaving any spots. The wear-resistant super-hydrophilic anti-reflecting coating disclosed by the invention has the technical advantages of simple preparation process, low cost, obvious effect, wide applicable scope and the like.

The invention discloses a carbon steel or stainless steel surface micro-arc oxidation ceramic coating based on an aluminized coating, and a preparation method thereof, and belongs to the technical field of metal surface treatment. A nanoscale pure aluminum coating is formed by performing multi-arc ion plating on the surface of a stainless steel matrix, the surface of the aluminized coating is subjected to single positive pulse micro-arc oxidation, and a ceramic coating with the main component being Al2O3 is formed on the surface of the stainless steel by controlling the components of an electrolyte and electrical parameters such as the frequency and the oxidation time, so that preparation of the stainless steel surface coating with a wear-resistant function is realized. The stainless steel surface ceramic coating prepared by the method has high corrosion resistance and scratching resistance and extremely high hardness, and solves the problem that the traditional stainless steel surface treatment technology (phosphorization, chemical plating and plasma spray-coating) cannot meet requirements such as high wear resistance, high hardness, high corrosion resistance and good binding force under the condition that the coating is thin (the thickness is less than 30 microns).