98results about How to "Lower coefficient of dynamic friction" patented technology

The disclosure relates to a spectacle lens comprising: a lens base member; a multi-layered anti-reflection film placed on the lens base member, and including a layer mainly made of silicon dioxide as an outermost layer; and a water-and-oil repellent layer provided in contact with the outermost layer of the multi-layered anti-reflection film, and made by using, as raw materials: at least one kind of a first fluorine-substituted alkyl group-containing organosilicon compound and a second fluorine-substituted alkyl group-containing organosilicon compound. The disclosure also relates to methods of producing a spectacle lens that is capable of retaining a sufficient water-and-oil repellency over an extended period, and having sufficient edge processability.

The invention discloses a short-fiber oil agent for aromatic polyamide fiber, which is prepared from 3 to 40 weight percent of polyol fatty acid ester, 5 to 70 weight percent of polyoxyethylene polyol fatty acid ester, 5 to 40 weight percent of fatty alcohol ethylene oxide-propylene oxide random copolyether or polyether ester, 1 to 40 weight percent of fatty alcohol polyethenoxy ether organic phosphate salt, 1 to 30 weight percent of fatty alcohol polyethenoxy ether sulfuric acid ester salt and 0.1 to 10 weight percent of polyether modified silicon oil. The oil agent can solve the defects of the poor main performance, i.e. poor electrostatic resistance, poor heat resistance, poor saturation, and the like of the prior oil agent, aims to provide an aramid short-fiber oil agent which has excellent electrostatic resistance, smoothness, softness and dyeing uniformity, enables the aramid short fiber to have excellent post processing performance, and the like.

The invention provides a method for preparing a trivalent chromium compound. The method comprises the following steps that a hexavalent chromium compound contacts with a reducing agent and a complexing agent under the existence of water, wherein the reducing agent is a substance capable of reducing hexavalent chromium into trivalent chromium; and the complexing agent is a substance capable of having complexation with trivalent chromium ions. When the trivalent chromium compound prepared by the method is adopted as a film forming agent of a galvanized self-lubricating steel plate, an obtained self-lubricating coating has obviously improved fingerprint resistance, corrosion resistance and adhesive force as well as obviously reduced coefficient of dynamic friction.

The iron and steel material treating process with synergistic fluoropolymer coating features the first chemical nickel plating of iron and steel material to form the base layer of the synergistic coating, the subsequent pore creating treatment of the nickel coating, the introducing of fluoropolymer to the pores and surface and the heat treatment under vacuum state for the fluoropolymer to fuse with the chemical coating to form the synergistic coating. The said technological process has the advantages of high coating hardness, high wear resistance, the self-lubricating performance and increased wear resistance caused by the fluoropolymer as friction reducing matter, resistance to most harmful matters of the fluoropolymer, and self-lubricating function of the dry coating.

The invention discloses a fabric type surface texture friction pre-filling type self-lubricating knuckle bearing. The fabric type surface texture friction pre-filling type self-lubricating knuckle bearing comprises an inner ring and an outer ring; a surface texture is machined on the outer sphere face of the bearing inner ring (3) and subjected to self-lubricating material friction pre-filling technology treatment to form a self-lubricating material friction pre-filling surface texture structure; and a layer of fabric self-lubricating material liner is pasted on the surface of the inner sphere face of the bearing outer ring (1). Abrasion to the fabric liner by the edge of the surface texture in the initial stage of friction is avoided to a certain degree, the surface texture is easily full of self-lubricating materials in a friction mode, and the process is simple. The self-lubricating materials pre-filling the textured surface optimize the friction interface material configuration, so that a friction surface transfer membrane is easy to generate, the texture edge cutting effect is weakened to a certain degree, the friction interface has lower static friction coefficient and lower dynamic friction coefficient, and accordingly the service life of the self-lubricating knuckle bearing is greatly prolonged.

The invention discloses a surface microporous SiC ceramic material, which consists of main raw materials, polycarbosilane and carboxymethyl cellulose, wherein the main raw materials consist of the following components in percentage by weight: 85 to 90 percent of silicon carbide powder and 10 to 15 percent of yttrium aluminum garnet; the polycarbosilane is 5 to 10 percent of the total weight of the main raw materials; and the carboxymethyl cellulose is 2 to 8 percent of the total weight of the main raw materials. Meanwhile, the invention discloses a method for preparing the surface microporous SiC ceramic material, which comprises the following steps of: uniformly mixing the silicon carbide powder, the yttrium aluminum garnet and the polycarbosilane, and adding aqueous solution of the carboxymethyl cellulose and performing ball-milling mixing; drying the obtained size; and molding the obtained powder and performing vacuum sintering at high temperature so as to prepare the surface microporous SiC ceramic material. The surface microporous SiC ceramic material keeps high strength, high hardness, abrasion resistance, corrosion resistance and oxidation resistance, the self-lubricating property of the material is improved, and a cross section can be prevented from being bonded. Therefore, the service life of the material is prolonged.

The invention discloses a filament oil agent for poly-p-phenylene telephthalamide, aiming to solve the problems, such as poor heat resistance, smoothness, adaptability and the like of the oil agent in the prior art. The filament oil agent for the poly-p-phenylene telephthalamide, provided by the invention, comprises the following components: (a) 3-60wt% polyol fatty acid ester, (b) 2-40wt% polyoxyethylene polyol fatty acid ester, (c) 5-40wt% fatty alcohol ethylene oxide-propylene oxide polyether fatty acid ester, (d) 1-20wt% polyoxyethylene alkyl phosphonate, (e) 5-30wt% long-chain fatty alcohol and fatty acid ester, (f) 1-20wt% adhesion property improver and (g) 0.1-5wt% polyether modified silicone oil. The oil agent has the advantages of good smoothness, heat resistance, antistatic property, dyeing uniformity and post processing property.

A ferritic stainless steel sheet for use in automobile fuel tanks and fuel pipes having smooth surface and resistance to organic acid is provided. The sheet contains, by mass, not more than about 0.1% C, not more than about 1.0 Si, not more than about 1.5% Mn, not more than about 0.06% P, not more than about 0.03% S, about 11% to about 23% Cr, not more than about 2.0% Ni, about 0.5% to about 3.0% Mo, not more than about 1.0% Al, not more than about 0.04% N, at least one of not more than about 0.8% Nb and not more than about 1.0% Ti, and the balance being Fe and unavoidable impurities, satisfying the relationship: 18<=Nb / (C+N)+2Ti / (C+N)<=60, wherein C, N, Nb, and Ti in the relationship represent the C, N, Nb, and Ti contents by mass percent, respectively. A process for making the same is also provided.

The invention relates to a valve seat ring for an alternative fuel engine. The valve seat ring comprises the following chemical components (weight percent): 0.8% -1.2% of C, 0.8% -1.2% of Si, 0. 4% -0.7% of Mn, 0.6% -0.9% of S, 5% -7% of Ni, 4% -6% of Cr, 10% -15% of Mo, 22%-27 % of Co, and the balance of Fe. The valve seat ring is machined by a powder metallurgy method in a vacuum environment, and the production process of two-time pressing and two-time sintering is adopted in the machining process. The valve seat ring has high abrasion resistance, high heat resistance and high corrosion resistance, the good matching of the valve seat ring and a valve is also ensured, and the high-strength valve seat ring material has good machinability, and the excessive machining cost cannot be caused. The content of hard particles reaches about 45%, and the high-strength valve seat ring can meet the requirements of various alternative fuels.

The invention discloses a compound wax microemulsion composition, and a preparation method and an application thereof. The compound wax microemulsion composition comprises the following components inpercent by weight: 8-28wt% of high melting point oxidized polyethlene wax, 4-14wt% of low melting point wax, 1-3wt% of a hyperbranched Gemini surfactant, 0.5-3wt% of a hyperbranched softener, 3-13wt%of an emulsifier, 0.1-1wt% of sodium hydroxide or potassium hydroxide and 50-80wt% of water based on the total weight of the compound wax microemulsion. The compound wax microemulsion can be preparedby a one-step high-temperature emulsification method which is simple in process. The prepared compound wax microemulsion is good in centrifugal stability and diluting stability. By trimming the microemulsion to a textile, the smooth performance of the textile can be improved obviously, the coefficient of kinetic friction of yarns can be reduced, the sewing performance and hydrophilia of a knittedfabric are improved, and yellowing is reduced.

The invention discloses a polyester spandex super-quick-drying knitted fabric and a processing method thereof. The fabric is woven through a special weaving method with complete-extinction super-fine-denier polyester fibers with the filament number of 1.1-1.7 D and spandex fibers as the raw materials, and the close-fitting surface of the fabric is provided with dotted jacquard protrusions capableof guiding moisture in one direction. The processing method includes the steps of conducting weaving through a four-track single-side knitting machine, wherein four needles 1, 2, 3 and 4 are adopted;forming one loop through fourteen paths; conducting post-processing through polyester keratase. By means of the special weaving structure, the close-fitting surface has a small protrusion jacquard effect, the contact area of the close-fitting surface and a human body is reduced, and the movable friction coefficient is reduced; the dotted protrusion jacquard part making contact with skin has a one-way moisture guide function, and the water expanding capacity is improved. The complete-extinction super-fine-denier polyester fibers are selected as the raw material, the surface area of the fibers is increased, subsequent fibers have a certain anti-UV effect, and the knitted fabric has the advantages of being soft in color and luster, good in deep dyeing performance, high in textile drapability,strong in shielding performance and the like.

The invention relates to a long-service-life multi-face self-lubricating antifriction plate in rubber tire mould manufacture industries and a manufacture method thereof. The antifriction plate comprises a steel base plate and an antifriction layer dressing. The manufacture method comprises applying the antifriction layer coating on the surface of the base plate, placing the base plate in a sintering furnace protected by decomposition ammonia for sintering at the temperature in a range of 800 DEG C to 900 DEG C for 20 minutes to 30 minutes, performing cold rolling and annealing treatment, and sending the base plate into a finishing roller for rolling. A copper alloy coating with the thickness larger than or equal to 0.1mm is coated after the base plate is subjected to planning processing and sand blasting, and the antifriction dressing layer is formed by mixing and preparing, by weight, 72% to 77% of copper powder, 11% to 12% of tin powder, 4% to 5% of lead powder, 1% to 2% of zinc powder and 7% to 9% of natural flaky graphite. The multi-face self-lubricating antifriction plate manufactured through the method has the advantages of being low in frictional coefficient, high in antifriction performance, few in maintenance time, long in service life and the like.

The invention belongs to the field of a polyurethane elastomer and particularly relates to an antifriction modified thermoplastic polyurethane (TPU) elastomer formula as well as a preparation method and application thereof. The formula comprises a component A, a component B, a component C and a component D according to the mass ratio of (95-105):(7-9):(0.04-0.06):(14-16), wherein the component A is a universal type thermoplastic polyurethane elastomer; the component B is a compatilizer; the component C is a vulcanizing agent; and the component D is ultrahigh-molecular-weight polyurethane. Theformual has the following beneficial effects: the ultrahigh-molecular-weight polyurethane with the characteristic of low friction coefficient is used for antifriction and high-temperature-resistant modification of TPU, grafting modification is conducted by adding the compatilizer, the problems that the thermoplastic polyurethane elastomer and the ultrahigh-molecular-weight polyurethane have different polarities and low compatibility are solved, the dynamical friction coefficient of the antifriction modified thermoplastic polyurethane elastomer can be reduced by 43 to 46 percent, the wear ratecan be reduced by 87 to 91 percent and the tensile strength can be increased by 28 to 34 percent.

Provided is a dip molded article obtained by dip molding a composition for dip molding comprising a latex of a carboxy-group-containing nitrile rubber. The dip molded article is characterized in that at least one surface thereof is subjected to a surface treatment, a film thickness is 0.02 to 0.2 mm, a coefficient of dynamic friction of the surface-treated surface is 0.5 or less, and a tensile strength after the surface treatment is 30 MPa or more.

The invention discloses an injectable decellularized scaffold for cartilage repair as well as a preparation method and application of the injectable decellularized scaffold, and relates to the technical field of medical materials. According to the method, a double-injection mode is adopted, and the gelated gradient injectable decellularized scaffold is obtained by injecting a pre-gel solution and a viscosity modifier simultaneously. The decellularized scaffold can load MSCs to be implanted into a body, is hydrolyzed under a physiological pH value, and slowly releases a medicine at an injured part, so that the differentiation of the loaded MSCs to cartilage cells is promoted, and the injured cartilage tissue is repaired; Due to the gradient property, original biological characteristics of the cartilage tissue can be better simulated, and a better repairing effect is achieved. According to the decellularized scaffold and the technology, the raw materials are cheap and wide in source, after clinical popularization, the pain of a patient can be remarkably relieved, the operation frequency is reduced, the treatment effect is improved, and remarkable social and economic benefits are achieved.

The invention relates to a method for using perfluoroalkyl-containing chain-terminated double-terminal functional group perfluoropolyether for producing single-terminal functional group perfluoropolyether. According to the method, through reaction of a perfluoroalkyl-containing compound, allyl bromide and the dihydroxy-terminal perfluoropolyether, perfluoroalkyl-containing chain-terminated perfluoropolyether allyl ether or the hydroxyl-terminated perfluoroalkyl-containing chain-terminated perfluoropolyether is obtained. Compared with the double-terminal functional group perfluoropolyether rawmaterial, the single-terminal functional group perfluoropolyether raw material produced through the method has more excellent smoothness, lubricity and rub resistance. A molecular chain of the single-terminal functional group perfluoropolyether is of a linear-chain structure, and has excellent flexibility, and an unfixed terminal has a very high degree of freedom after being rubbed.

The invention discloses a bendable protective film for a folding screen and a preparation method thereof. The protective film comprises a first flexible HC processing layer, a bendable base material layer, a second flexible HC processing layer, an anti-rebound OCA optical adhesive layer and a release isolation layer which are sequentially arranged in a stacked mode. The anti-rebound OCA optical adhesive layer is obtained by coating the surface of the second flexible HC processing layer with an anti-rebound OCA optical adhesive and then curing the anti-rebound OCA optical adhesive. The bendableprotective film for the folding screen is excellent in bending resistance, high in light transmittance, low in haze, excellent in scratch resistance and rebound resistance, excellent in bonding strength, relatively good in fingerprint resistance and oil stain resistance, small in dynamic friction coefficient, smooth in surface and relatively good in hand feeling; the bendable protective film canbe well applied to protection of flexible screens and curved screens which require bending performance and have scratch resistance and wear resistance.

The purpose of the present invention is to provide a wet friction material which has a high coefficient of friction, has reduced overall thickness change, and excellent heat resistance (resistance to heat spots).In order to accomplish the purpose, the present invention provides a wet friction material prepared by impregnating a base material comprising a fibrous substance with a thermosetting resin, and then thermally curing it, wherein the aspect ratio of the fibrous substance is 10 or higher, and the fibrous substance is contained in the base material in an amount of 60 to 75 weight % .

The invention discloses a flexible display screen cover plate and relates to the field of optical film technology. The flexible display screen cover plate comprises a transparent aromatic polyamide substrate; a polysilazane layer disposed on one side surface of the transparent aromatic polyamide substrate; a polarizing layer disposed on the aromatic polyamide substrate and on the other side, relative to the polysilazane layer, the aromatic polyamide substrate; and a hardened layer arranged on the polarizing layer and on the other side, relative to the transparent aromatic polyamide substrate,of the polarizing layer. According to the invention, the polarizing layer is directly prepared on the transparent aromatic polyamide substrate, so that the overall thickness of the flexible display screen cover plate is reduced, and meanwhile, the overall hardness of the flexible display screen cover plate is greatly improved.

The present invention relates to latex specially for dry process dustless paper and its preparation process, and belongs to the field of special chemical. butyl acrylate, methyl acrylate, ethoxyl acrylate, styrene, acrylic acid and butyl methacrylate as monomers, are added with deionized water, emulsifier, NaHCO3 and initiator to produce branch chain connection to form copolymer. The present invention can meet the requirement of producing dustless paper and is favorable to spraying. The present invention has high fiber combining strength of paper, high dry and wet strength, simple production operation and stable product quality.

The invention discloses an efficient manufacturing technology of a DTY elasticity enhancement addition agent composite material. The efficient manufacturing technology of the DTY elasticity enhancement addition agent composite material comprises the following steps that mineral oil A and mineral oil B are added and mixed in proportion to obtain mixed mineral oil with the viscosity of being 20Pa.s,and then the mixed mineral oil is stirred for 30 minutes under the conditions of normal temperature and normal pressure; a splashing resistant agent, a penetrating agent and a composite material areadded to the stirred mixed mineral oil in sequence, the materials are mixed and stirred, the materials are stirred for 30 minutes under the conditions of normal temperature and normal pressure, and amixed oil agent is obtained; the mixed oil agent is transferred to an intermediate tank and statically placed for 24 hours, and the DTY elasticity enhancement addition agent composite material is obtained; and the DTY elasticity enhancement addition agent composite material is canned, and the canned DTY elasticity enhancement addition agent composite material leaves a factory after the DTY elasticity enhancement addition agent composite material is detected and qualified. The efficient manufacturing technology of the DTY elasticity enhancement addition agent composite material is simple and efficient in technology and reasonable in formula, the manufactured DTY elasticity enhancement addition agent composite material is safe and environmentally friendly and has good smoothness, good antistatic property, good washability and stable storage performance, the splashing problem is solved, the DTY elasticity enhancement addition agent composite material has good usage performance, and the requirement of production can be met.

The invention provides a high performance polypropylene film and a preparation method thereof. The film comprises a top film, a core film and a lower film. The top film includes 2.0-3.0% of a nano-silica composition and 97.0-98.0% of first polypropylene, the core film includes 0.5-2.0% of a nano-silica composition and 99.5-98.0% of second polypropylene, and the lower film includes 3.5-5.0% of a nano-silica composition and 96.5-95% of third polypropylene, wherein the nano-silica composition includes 50-55% of nano-silica particles and 45-50% a resin modifier. Each layer of the film contains a specific content of nano-silica composition, so that the film has high modulus and elongation at break, low diffusion coefficient and solubility parameter to solvent small molecules, low dynamic friction coefficient, and has good comprehensive properties, thus being suitable for flexible packaging materials.

The invention belongs to the technical field of spatial exploration, provides a rock crushing sampling device for the asteroid environment, and particularly relates to the rock crushing sampling device for the asteroid environment. The problems that as for a traditional sampling device, when samples on the surface layer and the sub-surface layer of an asteroid are collected, the rock samples are hard to collect, the collected samples are broken, energy consumption is large, the size is large, the mass is large, and the structure is complete are solved. The rock crushing sampling device comprises a worm-shaped cam, a center rotating wheel, a needle bearing and an impacting unit. The rock crushing sampling device is mainly used for rock crushing work.

The invention discloses a non-stick coating layer, which is prepared from the following raw materials in parts by weight: 40 to 50 parts of epoxy acrylate, 25 to 32 parts of polyacrylic acid fluorine-containing ester, 25 to 32 parts of poly (vinylidene fluoride-trifluoroethylene), 10 to 15 parts of polytetrafluoroethylene powder, 2.5 to 4 parts of a suspension dispersing agent, 1 to 1.4 parts of aleveling agent and 1.5 to 2 parts of a curing agent. The non-stick coating layer has excellent lubricating performance and excellent non-stick performance, can completely meet the use requirements ofvarious processing molds (such as various plastic demolding, baking molds and papermaking and textile industries), contains no demolding agent (the production efficiency can be improved), and has excellent durability; in addition, no silicone oil is contained, and the product is prevented from being polluted; the adhesive force with a base material is large, the loading capacity is large, the impact resistance is good, the flexibility is good, the comprehensive performance is good, and the service life is long.