522 results about "Water repellent" patented technology

The invention discloses a high-strength moisture-proof gypsum board and a preparation method thereof, and relates to the technical field of gypsum board preparation. The high-strength moisture-proof gypsum board is prepared by dipping the surface paper in the composite dipping liquid and then pouring the surface paper and the gypsum core with the waterproof agent, the composite dipping liquid comprises the methoxy vinyl ether copolymer and the epoxy polyoxymethylene dimethyl ether, and the methoxy vinyl ether copolymer is 2, 3, 5-trimethyl-1, 3-pentanediol monoisobutyrate. According to the present invention, epoxy polyoxymethylene dimethyl ether is prepared by reacting 2, 4-dimethoxymethoxyphenylacetic acid with 2-hydroxyethyl vinyl ether, and the epoxy polyoxymethylene dimethyl ether is prepared by terminating polyoxymethylene dimethyl ether with allyl and then reacting with phthalimide hexperoxy acid, such that the waterproofness and the mechanical property of the gypsum board are improved; the waterproof agent is prepared by reacting hydrogen-containing silicone oil and fluorine-containing hyperbranched amide polyurea urethane, so that the moisture resistance and bonding strength of the gypsum board surface paper are enhanced, and additional mechanical support is provided for the gypsum board.

The invention provides anti-erosion hydraulic concrete and a preparation method thereof, and belongs to the technical field of concrete. The concrete comprises the following components: composite cement, high-activity nano-modified metakaolin, blast furnace slag powder, low-calcium fly ash, coarse aggregate, natural river sand fine aggregate, granite machine-made sand fine aggregate, an erosion inhibitor, a functional additive, an early-strength polycarboxylic high-performance water reducer, a composite air entraining agent and the like. The composite cement comprises sulphoaluminate cement, Portland cement and polymer waterproof mortar. The high-activity nano modified metakaolin is obtained by modifying metakaolin with an organic silicon-ZnO composite emulsion and then drying. The erosion inhibitor comprises organic carboxylate, a hydrophobic-crystallization complexing agent and a pH buffer type corrosion inhibitor. The functional auxiliary agent comprises an itaconic acid and acrylic acid copolymer, a JRY-F concrete waterproof agent and polyethylene glycol-400 dilaurate. The composite air entraining agent comprises liquid sodium abietate and sodium alpha-olefin sulfonate. Through component synergism, modification and grading, an anti-erosion barrier is constructed.

The invention belongs to the technical field of aluminum alloy cables, and discloses a high-strength heat-resistant light-weight green aluminum alloy cable which sequentially comprises a silver-aluminum alloy conductive core, a conductor shielding layer, an insulating layer, an insulating shielding layer, a PP filling rope, a non-woven fabric wrapping tape, a steel belt and a heat-resistant flame-retardant waterproof outer sheath layer from inside to outside. The silver-aluminum alloy conductive core comprises the following components in percentage by weight: 0.01 to 0.3 percent of Cu, 0.3 to 0.8 percent of Fe, 0.03 to 0.1 percent of Si, 0.01 to 0.05 percent of Zn, 0.02 to 0.05 percent of Mg, 0.001 to 0.04 percent of B, 0.01 to 0.08 percent of Ag and the balance of Al; the silver and copper microalloying effect is cooperated with the molded line film drawing process, so that the strength and the conductivity of the conductor are improved; and the outer sheath layer takes a polydimethylmethylhydrosiloxane grafted waterproof agent and a 4-vinyl aniline polymer as functional modifiers, and PVC is compounded, so that the cable is endowed with excellent heat-resistant, flame-retardant and waterproof characteristics.

The invention relates to the field of solid waste co-processing and utilization, and particularly discloses complex-phase gypsum-based self-leveling mortar and a preparation method thereof. The mortar comprises the following raw materials in parts by mass: 75-95 parts of complex-phase gypsum, 3-25 parts of an auxiliary cementing material and 0.5-2.5 parts of an auxiliary mixture, the complex-phase gypsum comprises semi-hydrated gypsum, dihydrate gypsum and anhydrous gypsum; the auxiliary gelling material is a mixed compound material of ordinary Portland cement, aluminate cement, a calcium sulphoaluminate cementing material and sulphoaluminate cement; the additive mixture comprises one or more of a retarder, a water-retaining agent, a suspension / stabilizer, a water reducing agent, a flow promoter, a defoaming agent, a water repellent and an exciting agent. The gypsum-based self-leveling mortar prepared by the invention integrates the advantages of single semi-hydrated gypsum and single anhydrous gypsum, realizes the characteristics of high early strength and high later strength, and has the advantages of high strength, good wear resistance and low cost.

The invention relates to the technical field of composite materials, in particular to a composite material for a waterproof breathable film and a preparation method of the composite material. The composite material for the waterproof breathable film comprises the following raw materials: PTFE resin, zinc oxide, a surfactant, a compatibilizer and a waterproof filler, the waterproof filler is a porous inorganic carrier material treated by a silane modified waterproof agent; the silane modified waterproof agent is a compound containing a perfluoropolyether chain segment and a siloxane chain segment. According to the prepared composite material for the waterproof and breathable film, the porous filler is subjected to surface modification through the perfluoropolyether-silane coupling agent, and the waterproofness, breathability and mechanical property of the PTFE composite material can be synchronously and synergistically improved.

The invention discloses a fireproof coated pipe as well as a preparation method and application thereof, and relates to the field of organic composite materials. The fireproof coated pipe comprises a mother blank material and a liquid waterproof agent, wherein the mother blank material comprises a flame-retardant polymer matrix, coated graphite and a heat-conducting filler; the coated graphite is formed by expanded graphite and a coating layer on the surface, and the coating layer comprises a silicon source and a phosphorus source. The surface of the expanded graphite is coated with the silicon dioxide-phosphide composite material, so that the compatibility of the filler and a specific type of flame-retardant polymer matrix can be improved, the addition amount of the heat-conducting filler is reduced to ensure uniform dispersion, and synergistic multiplication of a flame-retardant function and optimization of a heat-conducting network are realized; meanwhile, a specific type of liquid waterproof agent is introduced and is extruded and blended with the master batch, so that the material is endowed with excellent waterproofness, meanwhile, the compatibility with other core properties is ensured, the waterproof coated pipe material with efficient heat conduction, flame retardance, waterproofness and mechanical strength is provided, and the application field is expanded.

The invention discloses a strong hydrophobic type composite concrete waterproofing agent as well as a preparation method and a use method thereof. The waterproofing agent is prepared from 14-18 parts of a hydrophobic / temperature-inhibiting composite active component, 2-3 parts of a silane coupling active component, 2-3 parts of an emulsifying active component, 4-6 parts of a complexing active component, 8-10 parts of a crystallizing active component and 60-70 parts of water. The polyorganosiloxane / paraffin composite emulsion is synthesized in one step by co-emulsifying polyorganosiloxane and paraffin, and other functional active components are compounded, the preparation method provided by the invention is simple to operate, and the prepared waterproof agent system is stable and has the following beneficial effects after being doped into concrete: 1, the hydrophobicity of the concrete is remarkably improved; 2, excellent crystallization performance helps self-healing of concrete microcracks, and the impermeability of concrete is significantly improved; and 3, cracks caused by too fast temperature rise of initial hydration heat of the concrete are effectively inhibited, and the crack resistance of the concrete is remarkably improved.

To provide: a water-repellent composition from which it is possible to obtain a water-repellent fiber product excellent in water repellency, durable water repellency, water pressure resistance, durable water pressure resistance, abrasion resistance, durable abrasion resistance, and texture; a method for producing a water-repellent fiber product using the same; and a water-repellent fiber product using the same.SOLUTION: A water-repellent composition contains an amino-modified silicone, a silicone resin, and an alkyl polysiloxane, where: the blending amount of the silicone resin is 1,000-5,000 pts.mass relative to 100 pts.mass of the blending amount of the amino-modified silicone; and the blending amount of the silicone resin is 60-130 pts.mass relative to 100 pts.mass of the total blending amount of both the amino-modified silicone and the alkyl polysiloxane.SELECTED DRAWING: None

The invention relates to a phase change microcapsule composite aerogel thermal insulation material and a preparation method thereof. The phase change microcapsule composite aerogel thermal insulation material comprises a phase change energy storage layer and a thermal insulation layer, the phase change energy storage layer is prepared from energy storage powder and an adhesive, and the phase change energy storage powder comprises a thermal insulation material, phase change microcapsules, a flame retardant and fibers; the heat preservation and insulation layer is prepared from heat preservation and insulation powder and an adhesive, and the heat preservation and insulation powder comprises a heat preservation material, a flame retardant and fibers; the adhesive comprises polyvinyl alcohol, boric acid and silica sol. The preparation method of the phase-change microcapsule composite aerogel plate comprises the following steps: preparing a bonding agent into a bonding solution by using water, a defoaming agent and a water repellent agent, mixing the energy storage powder with the bonding solution, mixing the heat preservation and heat insulation powder with the bonding solution, obtaining a plate blank by adopting a sectional double-roller process, and curing and drying to obtain the phase-change microcapsule composite aerogel plate. The microcapsules in the aerogel plate and the aerogel have a synergistic effect, the excellent heat preservation performance is continuously achieved in the phase change process and after phase change is completed, and heat conduction is effectively reduced.

The application discloses a kind of organic silicon waterproof agent for ultra-high performance concrete plate and preparation method, including hydroxyl silicone oil 5-20 parts, silane coupling agent 2-10 parts, amino silicone oil 1-5 parts, nano white carbon black 1-10 parts and organic solvent 50-100 parts.The organic silicon waterproof agent of the application can be used on the surface of UHPC plate, cement concrete base material, mortar fast, stone material, etc., can form the effect of super-hydrophobic on the surface of base material, and make the water-repellent performance of base material surface keep long.The method of the application can economically and efficiently produce the waterproof agent by using simple and cheap raw materials, the production process is simple, energy consumption is low, and the waterproof agent can be mass-produced and used.

The invention discloses aerogel thermal-insulation waterproof mortar and a preparation method thereof. The mortar is prepared from cement, hydrophobic aerogel, interface modified asphalt rubber powder, a composite phase change heat conduction material, blast furnace slag micro powder, silica fume, nano montmorillonite, titanium dioxide aerogel powder, expanded vermiculite, shape memory polymer emulsion, chitosan, charcoal powder, carbon fibers, basalt fibers and the like. The preparation method comprises the following steps: carrying out plasma treatment and modification with an organosilicon waterproofing agent to obtain hydrophobic aerogel; carrying out interface modification on the asphalt rubber powder by adopting a titanate coupling agent; a phase change microcapsule-carbon nanotube heat conduction network is constructed through ball milling compounding; a basic framework is formed by adopting a graded mixing process, and then functional components are introduced; and finally, realizing cross-linking curing of the shape memory polymer and the chitosan through ultrasonic assistance and programmed temperature control. The mortar prepared by the invention realizes integration of multiple functions, and effectively solves the technical problems of single performance and poor durability of a traditional thermal insulation material.

The invention relates to the technical field of building materials, and provides a sound-insulation fireproof building material and a preparation method thereof. The sound-insulation and fireproof building material is prepared from, by weight, 100 parts of flame-retardant wood fiber, 15-30 parts of adhesive, 5-6 parts of hollow glass beads and 1-3 parts of waterproof agent, a preparation method of the flame-retardant wood fiber comprises the following steps that a flame retardant is dispersed in a solvent, wood fiber is added, mixing and drying are conducted, and the flame-retardant wood fiber is obtained; and the flame retardant comprises a 2, 4-dihydroxy-5-pyrimidine boric acid and / or a phenyl phosphate compound. By means of the technical scheme, the problem that in the prior art, sound-proof and fireproof building materials are poor in flame retardant property is solved.

The invention discloses a high-abrasion-resistance concrete additive as well as a preparation method and application thereof, and belongs to the technical field of concrete additives. The invention discloses a concrete additive with high abrasion resistance. The concrete additive is prepared from the following raw materials in percentage by mass: 30-40% of silica fume, 15-20% of mineral powder, 8-12% of nano silicon carbide, 2-8% of zirconium oxide microspheres, 10-15% of a polycarboxylic acid water reducer, 3-5% of an organic silicon water repellent, 2-5% of nano titanium dioxide and 5-10% of a modified bamboo-based material. The anti-abrasion additive prepared by the invention can ensure that the permeability coefficient is greater than or equal to 0.5 mm / s while ensuring the high anti-abrasion performance of concrete, is suitable for engineering scenes such as permeable pavements and the like with strict requirements on water permeability, and realizes the synergistic improvement of high water permeability (greater than or equal to 0.5 mm / s) and ultrahigh anti-abrasion performance (the strength ratio is greater than or equal to 140%) of the concrete; the problem that the water permeability and the abrasion resistance of traditional concrete cannot be synchronously improved at the same time is successfully solved.

The invention relates to the technical field of paper preparation, in particular to environment-friendly water-resistant paper as well as a preparation method and application thereof. The water-resistant paper is prepared by physically embossing a hydrophobic paper semi-finished product and then coating the hydrophobic paper semi-finished product with a hydrophobic coating. The hydrophobic paper semi-finished product is prepared from the following components in parts by weight: 65 to 80 parts of hydrophobic modified lignin fiber, 10 to 20 parts of an adhesive, 2 to 5 parts of a waterproof agent, 5 to 15 parts of filler, 0.05 to 0.1 part of a filter aid and 0.5 to 1 part of an antioxidant. The water-resistant paper not only has the characteristics of excellent water resistance, instant water resistance, pollution resistance, self-cleaning, no toxicity, easiness in degradation, recoverability and environmental protection, but also has firm wet mechanical strength and long service life, meets the urgent demand of the market on environment-friendly paper, conforms to the European Union laws and regulations, can also improve the additional value and profit margin of common paper, and has wide application prospects. Industrial upgrading and product differentiation competition are brought to the papermaking industry, and wide application prospects are achieved.

The present invention relates to the technical field of aerosol fire extinguishing agents. Specifically disclosed are a chemical coolant for an aerosol fire extinguishing agent, and a preparation method therefor and a use thereof. The coolant comprises the following components in percentage by weight: 80%-95% of an organic acid, 1%-10% of a lubricant, and 1%-10% of silicone oil. The preparation method specifically comprises: weighing the organic acid, the lubricant, and the silicon oil, uniformly mixing same in proportion, granulating by a screen, and pressing the obtained particles by means of a tablet press so as to obtain a chemical coolant tablet for an aerosol fire extinguishing agent. In the present invention, the organic acid is used as a main raw material, and the lubricant and a water repellent agent are added, so that it is convenient for preparation, molding and storage; during specific use, the surfaces of aerosol particles are coated with the organic acid, so that the hygroscopicity of the coolant and corrosion to metal are reduced.

Provided is a water repellent composition comprising (A) a polymer and (B) a silicone compound, wherein the polymer (A) contains a repeating unit derived from a hydrocarbon group-containing monomer (a) having a hydrocarbon group having 2-40 carbon atoms; the silicone compound (B) is composed of a non-resin-based silicone and a resin-based silicone; in a GPC chart of the silicone compound (B), there is a peak top in a region in which the molecular weight is 1500 or more; a component having a molecular weight of 1500 or more in the silicone compound contains the non-resin-based silicone excluding amino-modified silicones; and the amount of the silicone compound (B) is 1%-49% by weight with respect to the total amount of the amount of the polymer (A) and the amount of the silicone compound (B). The water repellent composition according to the present disclosure can provide a water repellent composition that can impart good water repellency and good chalk mark properties to a base (in particular, a fiber product).

A slide fastener includes a pair of left and right fastener tapes; and a pair of element rows including a plurality of fastener elements that face edge portions of the fastener tapes on sides facing each other along a length direction of the fastener tapes, and to which a slider that engages with the pair of element rows is slidably attached. The fastener element is made of a metal, a water-repellent layer made of a water-repellent agent is provided on the fastener tape, and adhesion of water to the fastener tape is prevented by the water-repellent layer.

A composite fiber is provided in which two types of segments A and B are present in a fiber transverse section, where the segment B has a cross-sectional area smaller than a cross-sectional area of the segment A, and is formed of two types of polymers combined in a side-by-side type or an eccentric core-sheath type; and where a multifilament is composed of two types of filaments A and B, in which one or more of the filaments B are present between any two of the filaments A in the multifilament; and where a woven or knitted fabric is subjected to water repellent finish and includes a multifilament composed of two types of filaments A and B, in which one or more of the filaments B are present between any two of the filaments A in the multifilament.

The invention discloses a biomass-based degradable waterproof and oilproof coating as well as a preparation method and application thereof. The biomass-based degradable waterproof and oil-proof coating is composed of a waterproof coating and an oil-proof coating, and the waterproof coating is composed of a stearic acid emulsion, nano cellulose, a waterproof agent, an inorganic filler, a dispersant, a defoaming agent, a coalescing agent, a pH regulator and water. The oil-proof coating is prepared from natural resin, plant-based fatty acid ester, chitosan, nano cellulose, a waterproof agent, an oil-proof agent, inorganic filler, a dispersing agent, a defoaming agent, a preservative, a pH regulator and water. The biomass-based degradable waterproof and oil-proof coating has the advantages that the raw materials are natural in source, degradable and convenient to use, a formed coating has excellent waterproof and oil-proof performance and excellent thermal stability, and the like, can be used for products needing waterproof and oil-proof performance such as paper pulp molded products, and is suitable for large-scale industrial production and application.

The invention discloses a synthesis method of an organosilicon polyurethane fluoride-free waterproof agent, which belongs to the technical field of chemical preparation, and is prepared by adopting organosilicon as a main body to react with diisocyanate and acrylate monomers, carrying out chain extension by using a special double-bond chain extender and then adding various assistants. Organic silicon is a low-surface-energy substance and has a good water-repellent effect, a large number of siloxane bonds exist in the organic silicon, bond angles of the siloxane bonds are large, and methyl connected to silicon atoms can freely rotate. After use, the fabric has a good waterproof effect and a soft hand feeling; after the fluorine-free waterproof agent with the branched structure is used, a certain rough texture can be formed on the fabric, the surface roughness can influence the contact angle of liquid drops on the fabric, the nano lotus effect is realized, and the fabric has an excellent waterproof effect; the cationic waterborne polyurethane can be well combined with fabrics with negative charges, so that the waterproof agent is better in washability.

The utility model relates to the technical field of functional fabrics and garments, and provides a novel composite fabric and a thermoregulation garment, the novel composite fabric comprises a water repellent layer, a waterproof vapor-permeable layer and a thermoregulation layer which are sequentially arranged from outside to inside, and a bonding layer with a net structure is arranged between every two layers, the waterproof and vapor-permeable layer is a TPU waterproof and breathable film, water drops are prevented from passing through the waterproof and vapor-permeable layer, and meanwhile, the waterproof and vapor-permeable layer has excellent air and moisture permeability, the temperature-regulating layer is a PCM phase-change temperature-regulating fabric, and a phase-change material in the PCM phase-change temperature-regulating fabric can regulate heat and provide a comfortable microclimate environment for a human body, so that the composite fabric has excellent properties of the three kinds of fabrics, and the composite fabric is suitable for popularization and application. And the automobile seat cushion is high in comfort and can be applied to different weather and environment temperatures at the same time. Besides, the water-repellent fabric is formed by interweaving the water-repellent polyester yarns, and the PCM phase-change temperature-adjusting fabric is formed by interweaving the temperature-adjusting fiber yarns, so that the composite fabric has better functional durability and is resistant to washing.

The application relates to the technical field of finishing agents, and discloses a water-based fluorine-free low-temperature water-repellent finishing agent and a preparation method and application thereof. 2,2-dimethylol propionic acid alkyl ester and methyl phenyl dichlorosilane are reacted to obtain an alkyl ester siloxane copolymer, which is then stirred and dispersed with water and an emulsifier to obtain the water-based fluorine-free low-temperature water-repellent finishing agent. The main chain of the water-based fluorine-free low-temperature water-repellent finishing agent is a hydrophobic phenyl polysiloxane molecular chain, and the side chain contains hydrophobic ester groups and long carbon chains. After finishing of terylene fabric, water molecules can be prevented from contacting the terylene surface, and the hydrophobic and water-repellent performance of the terylene fabric is significantly improved. Moreover, a high water contact angle can be maintained after multiple washes.

The invention discloses a positive pole piece, a preparation method thereof and an aqueous battery, belongs to the technical field of aqueous batteries, and solves the problems that in the prior art, an Al-based current collector on the positive side of an aqueous battery and a high-potential positive electrode material are easy to generate a primary battery spontaneous reaction in the aqueous battery, so that the current collector is easy to corrode, easy to break and poor in compatibility; the battery capacity is reduced; and the cycle life is attenuated. The positive pole piece comprises a current collector, functional layers are arranged on the two sides of the current collector, and electrode material layers are arranged on the sides, away from the current collector, of the functional layers. The current collector is an Al-based current collector, and the functional layer comprises a functional material, a water repellent agent and a protective material. The positive pole piece disclosed by the invention is not easy to corrode and break.

Provided is a water-absorbing sanitary shorts capable of improving the diffusivity of bodily fluids and suppressing backflow of the fluids. The water-absorbent sanitary shorts (1) are reusable shorts, and have a surface layer (10), an absorbent layer (20) disposed on the non-skin surface side (T2) of the surface layer, and a water-repellent layer (30) disposed on the non-skin surface side of the absorbent layer. The surface layer and the absorbent layer contain non-water-absorbent fibers as the main body. The hydrophobicity of the skin surface of the surface layer is higher than the hydrophobicity of the non-skin surface of the surface layer. The absorbent layer has an introduction region (25) in which the density increases from the skin surface side toward the non-skin surface side. The introduction region has a diffusion portion (27) containing fibers oriented in a planar direction.

The present application relates to the technical field of materials, and particularly relates to a kind of impermeable material and preparation method thereof.Impermeable material includes electrolytic manganese residue 142-148 parts, solvent 34-38 parts, dispersing agent 34-38 parts, crosslinking agent 0.5-1 part, water repellent 5-8 parts and initiator 22-26 parts;The component ratio of electrolytic manganese residue and solvent is 4:1;The grain size of impermeable material is 1-3.5 μm, wherein the grain size of 1-2 μm accounts for 50-60%, and the grain size of 2-3.5 μm accounts for 40-50%.By blending electrolytic manganese residue, solvent, dispersing agent, crosslinking agent and accelerator, a first solution is obtained;Water repellent, initiator and coupling agent are added to the first solution and blended, and curing is carried out to obtain impermeable material.Through the component setting and preparation method of the present application, the impermeable material obtained has good strength, corrosion resistance and impermeability and other properties.

The utility model relates to the technical field of building construction, and discloses a basement side wall anti-drainage combined structure during reverse building method construction, which comprises clay, a P8 anti-seepage grade continuous wall serving as a side wall is arranged on the inner wall of the clay, one side of the P8 anti-seepage grade continuous wall serving as the side wall is provided with spraying concrete for leveling, and the other side of the P8 anti-seepage grade continuous wall serving as the side wall is provided with spraying concrete for leveling. A waterproof agent is arranged on the side, serving as the side wall, of the P8 impervious grade continuous wall, a waterproof coating is arranged on the inner wall of the P8 impervious grade continuous wall, a cement mortar protection layer is arranged on the inner wall of the P8 impervious grade continuous wall, a waterproof cement fiber wall plate is arranged on the side, serving as the side wall, of the P8 impervious grade continuous wall, and the waterproof cement fiber wall plate is arranged on the side, serving as the side wall, of the P8 impervious grade continuous wall. According to the utility model, through a mode of combination of prevention and drainage, the leakage rate of the side wall is reduced through a reverse construction method, the maintenance cost is reduced, the structure durability and the wall surface flatness are both realized, the waterproof effect is improved, and the construction cost is reduced. And the service life of the building is prolonged.

The invention relates to the technical field of coatings, and discloses a waterproof composite coating for a non-stick pan and a preparation method of the waterproof composite coating, the composite coating sequentially comprises a transition bonding layer, a waterproof blocking layer and a surface non-stick layer from inside to outside, and each layer is prepared from raw materials in a specific proportion. The transition bonding layer takes titanium carbide, potassium feldspar and the like as main raw materials, the waterproof blocking layer comprises bisphenol A epoxy resin, modified tea polyphenol and the like, and the surface non-stick layer takes polytetrafluoroethylene as a core. The preparation method sequentially comprises the steps of substrate pretreatment, transition bonding layer preparation, waterproof barrier layer preparation and surface non-sticky layer preparation, and the process is simple and controllable. The composite coating has excellent waterproof performance, firm binding force with a base body and good non-stick performance, the service life of the non-stick pan can be effectively prolonged, health risks caused by coating damage are reduced, and the composite coating is suitable for large-scale production.

The utility model discloses a waterproof resistive touch screen, which relates to the technical field of resistive touch screens, and comprises a shell, a hydrophobic layer, buffer slots I and buffer slots II, a plurality of buffer slots I are formed in the front side, the rear side, the left side and the right side of the shell, and balls I are movably connected in the buffer slots I; a plurality of first buffer grooves are formed in the lower end of the shell, first reset springs are fixedly connected into the first buffer grooves, a plurality of second buffer grooves are formed in the lower end of the shell, second balls are movably connected into the second buffer grooves, second reset springs are fixedly connected into the second buffer grooves, and a back plate is fixedly connected into the shell. Buffer grooves with balls and reset springs are formed in the front side, the rear side, the left side, the right side and the lower end of the shell respectively, when the touch screen falls off or is collided, the balls firstly make contact with the ground or a colliding object, impact force is absorbed by compressing the reset springs, meanwhile, the balls rotate to disperse collision force, damage to the touch screen can be effectively reduced, the impact resistance of the touch screen is improved, and the service life of the touch screen is prolonged. The service life is prolonged.

A water repellent and oil repellent member which has a functional film layer serving as the first layer on at least one surface of a base material, while having a primer layer serving as the second layer on the outer surface of the functional film layer and additionally having a water repellent and oil repellent layer serving as the third layer on the outer surface of the primer layer, wherein: the primer layer is formed of a layer that has a film thickness of 10-500 nm, while being mainly composed of an organosilicon compound which has a plurality of silanol groups in each molecule; and the water repellent and oil repellent layer is formed of a layer that has a film thickness of 0.5-50 nm, while being mainly composed of a cured product of a hydrolyzable fluorine-containing compound. This water repellent and oil repellent member has excellent rubber eraser abrasion resistance, while exhibiting excellent antistatic properties. In addition, the present invention is capable of forming a water repellent and oil repellent layer having excellent rubber eraser abrasion resistance and excellent antistatic properties on various base materials.

The utility model relates to a fluoride-free environment-friendly nanometer waterproof agent spraying device which aims at solving the technical problems that the space of a spraying area of an existing device is small, and people are troublesome to bend to enter and place the device, and the fluoride-free environment-friendly nanometer waterproof agent spraying device comprises a spraying machine body and further comprises a lead screw body and a placing plate. The lead screw body is arranged on a rack in the spraying machine body; the placing plate is arranged on the lead screw body; wherein the middle section of the bottom side of the placing plate is connected with a thread nut of the lead screw body, and the lead screw moving device has the advantages that the lead screw body is moved out of a rack in the spraying machine body, and operation is conducted outside.