109results about How to "Maintain durability" patented technology

The invention relates to the technical field of building materials, and particularly discloses high-strength lightweight concrete containing hollow glass beads and a preparation method of the high-strength lightweight concrete. The high-strength lightweight concrete containing the hollow glass beads is prepared from cement, fly ash, carbon fiber grafted hollow glass beads, lightweight sand, deionized water, polypropylene fiber grafted rubber particles and a water reducing agent according to the mass ratio of (58-75): (25-38): (45-65): (20-40): (42-55): (35-55): (5-12) through mixing, mold filling, vibration molding, covering and demolding. The addition amount of the hollow glass beads is strictly controlled, the influence on the overall strength of the concrete is avoided, the density and weight of the concrete are reduced due to the addition of the light sand and the hollow glass beads, the compactness and integrity of the concrete are improved due to the synergistic effect of the two added fibers, and the raw materials have excellent cohesiveness; the concrete can effectively absorb and disperse stress, and has the advantages of excellent strength, light weight, good durability and excellent comprehensive performance.

The invention discloses a quasi-zero stiffness metamaterial vibration reduction mounting structure of an underwater vehicle hydrophone, which belongs to the technical field of underwater vehicles, and comprises an oil seal end cover mounted at the front end of a front fairing of an underwater vehicle, a mounting rack fixed at the front end part of the oil seal end cover, and two quasi-zero stiffness vibration reduction components arranged in front of and behind the mounting rack, the outer side parts of the quasi-zero-stiffness vibration reduction components are connected with the mounting frame, concave parts for clamping the end parts of the hydrophone are formed in the middle parts of the quasi-zero-stiffness vibration reduction components, and a mounting space for arranging the hydrophone is formed between the two quasi-zero-stiffness vibration reduction components; and the two ends of the hydrophone are respectively clamped and clamped in the concave parts of the two quasi-zero stiffness damping components. According to the quasi-zero-stiffness metamaterial damping device, through conformal design, vibration attenuation, structure optimization and energy-saving effects, an efficient, stable and low-noise hydrophone installation solution is provided for an autonomous underwater vehicle, and the performance of the quasi-zero-stiffness metamaterial damping device in underwater detection and signal acquisition is remarkably improved.

The invention relates to the technical field of all-vanadium redox flow batteries, and discloses a carbon grid derived multi-layer composite bipolar plate for a vanadium battery and a preparation method of the carbon grid derived multi-layer composite bipolar plate for the vanadium battery. The preparation method comprises the following steps: brushing a mixed slurry 1 prepared from a conductive filler, a binder and the like onto the surface to obtain preliminarily modified carbon fibers, then brushing a mixed slurry 2 prepared from oxide nanoparticles, conductive macromolecules and the like onto two surfaces of the preliminarily modified carbon fibers, drying, and repeating the two brushing and drying steps to obtain multi-layer conductive support layer modified carbon fibers; graphite paper is attached to the obtained carbon fibers, and then hot pressing treatment is performed to obtain the carbon conductive grid derived multi-layer composite bipolar plate. According to the prepared multi-layer composite bipolar plate, the etched carbon fiber is used as a substrate, beneficial mechanical strength and conductive grids are provided through stacking of the multiple layers of conductive coatings, the stability and conductivity of the bipolar plate are effectively improved, and therefore the efficiency of a vanadium battery is improved.

The invention provides high-reliability photovoltaic OBB dispensing glue and a preparation method thereof. The high-reliability photovoltaic OBB dispensing glue specifically comprises glue consisting of 2D resin modified acrylate resin, an anti-yellowing acrylate monomer and a photoinitiator. 2D resin modified hydroxyethyl acrylate is added into the glue, so that the adhesive force, the water resistance and the chemical resistance of the glue are effectively improved; by introducing the yellowing-resistant acrylate monomer, the yellowing resistance and the comprehensive performance of the glue are enhanced; meanwhile, due to the optimal proportion of the photoinitiator, the curing rate of the glue is remarkably increased. The prepared photovoltaic OBB dispensing glue has the characteristics of high solid content, high stability, good weather resistance, excellent mechanical properties and the like, is particularly suitable for packaging application of photovoltaic modules, can keep excellent properties in a harsh environment, and meets environmental protection requirements.

The invention discloses a low-smoke halogen-free polyolefin insulating layer fireproof cable. According to the low-smoke halogen-free sheath fireproof cable disclosed by the invention, excellent flame retardant property and low-smoke emission characteristic are realized by optimizing a multi-layer structural design and selecting specific material combination. The polyolefin insulating layer adopts the combination of modified polyethylene and EVA (Ethylene Vinyl Acetate), so that the elasticity and the thermal stability of the cable are enhanced; through the synergistic effect of magnesium hydroxide, aluminum hydroxide, kaolin and glass fibers, the flame retardant property and the mechanical strength of the mineral fireproof layer are remarkably improved; the polyolefin elastomer, the polypropylene blend, the nanoscale magnesium hydroxide and other materials in the low-smoke halogen-free sheath provide excellent low-smoke and environment-friendly flame-retardant effects, and meanwhile, the durability and the structural stability of the cable are kept.

The invention provides a cross-shaped moisture absorption and sweat releasing polyester fiber and a preparation method thereof, and relates to the technical field of polyester fiber production. The cross section of the cross-shaped moisture absorption and sweat releasing polyester fiber is in a cross shape, the cross-shaped moisture absorption and sweat releasing polyester fiber comprises four ribs evenly distributed in the circumferential direction and a cross-shaped through hole located in the center, a plurality of micropores are distributed in the surfaces of the ribs, and the average pore size of the micropores is 0.1-0.5 micrometer; secondly, the polyester fiber is composed of hydrophilic modified polyester, hydrophilic polyester master batches containing calcium carbonate powder and a moisture absorption and sweat releasing agent according to the mass percentage of 70-85: 10-20: 5-10, and the moisture absorption and sweat releasing agent is a polyether ester block copolymer. According to the cross-shaped moisture absorption and sweat releasing polyester fiber, the cross section is cross-shaped, the cross-shaped moisture absorption and sweat releasing polyester fiber has a large specific surface area, moisture diffusion and evaporation are facilitated, the moisture absorption performance of the fiber can be improved through the micropores in the surfaces of the beads, air circulation is facilitated through the cross-shaped through hole in the center, and the sweat releasing effect is improved.

The technical problem to be solved by the utility model is to provide the manufacturing equipment for the whole-house integrated stair strip, the manufacturing equipment comprises a rack, a sliding rail is arranged on the rack, a processing panel is arranged on the sliding rail, and the processing panel comprises a heating bottom plate and a forming plate; a pressure sensor and a first temperature sensor are arranged between the heating bottom plate and the forming plate; a forming pressing rod is arranged in front of the machining panel, the forming pressing rod is connected to a motor, a distance sensor is arranged on the forming pressing rod, and a pressing plate is arranged above the machining panel. According to the equipment, plates for manufacturing house floors are directly pressed into stair strips of various shapes, and the shape of a finished product is guaranteed by keeping the distance between a machining panel and a forming pressing rod in the machining process. Due to the adoption of the technical scheme, the technical scheme of distance control is adopted in the pressing process, so that the surface and the bent part of a plate cannot be damaged, and the attractiveness and the durability of the machined stair strip at the bent part can be ensured.

The embodiment of the invention relates to a temperature prediction method and device for a pouring area, equipment and a medium. The method comprises the steps of obtaining sample data of a sample pouring area; training the initial model according to the sample data to obtain a temperature prediction model; wherein the temperature prediction model is used for predicting the temperature in the pouring area; obtaining index data of the to-be-detected pouring area; wherein the section of the to-be-measured pouring area is the same as that of the sample pouring area, and the index data comprises coordinates of a to-be-measured temperature measuring point in the to-be-measured pouring area after pouring, the surface temperature of the to-be-measured pouring area after pouring, material attribute data of target concrete for pouring the to-be-measured pouring area and environmental data of the to-be-measured pouring area; and inputting the index data into the temperature prediction model to obtain the predicted temperature of the to-be-measured temperature measurement point in the to-be-measured pouring area. According to the embodiment of the invention, the method achieves the automatic and intelligent prediction of the internal temperature of the pouring region, improves the prediction accuracy, and maintains the durability and stability of concrete.

The utility model relates to the technical field of power sockets, and discloses a power cable plug, which comprises a plug body, a tension sensing device and an early warning device, and is characterized in that the tension sensing device is connected with the plug body and can sense the tension of a power cable in real time and transmit tension information to the early warning device; and the early warning device judges whether the power supply cable is subjected to overlarge tension according to the tension information, and sends out an early warning signal when judging that the tension exceeds a preset value. Through the design, a user can timely know the condition that the tension of the power supply cable is too large, so that damage of a power line or abnormity of power supply equipment caused by the condition is avoided. According to the invention, the safety and stability of the power supply equipment are improved, and the reliability of a power system is enhanced at the same time.

The invention provides high-thermal-insulation wear-resistant rubber and a preparation method thereof. Comprising the following steps: taking raw nitrile rubber, carrying out open milling, adding zinc oxide, stearic acid, microcrystalline wax and an anti-aging agent, and carrying out mixed open milling; adding the thermal-insulation wear-resistant filler into the open milling system, and uniformly mixing; adding an accelerant TMTD and sulfur, carrying out triangular package making for multiple cycles, carrying out thin-passing to obtain sheets, and standing to obtain a rubber compound; and putting the rubber compound into a plate mold, and vulcanizing by using a plate vulcanizing machine. A multi-layer heat insulation structure is formed by adopting the heat preservation and wear-resisting filler compounded by the hydrophobic porous aluminum oxide hollow spheres and the dendritic silicon dioxide, the hydrophobic porous aluminum oxide hollow spheres can effectively prevent heat conduction due to a hollow air filling structure, the heat conductivity is very low, and meanwhile the heat preservation and wear-resisting properties of the hydrophobic porous aluminum oxide hollow spheres are greatly improved due to the hydrophobic characteristic of the hydrophobic porous aluminum oxide hollow spheres. The low-thermal-conductivity ceramic is free from the influence of moisture and keeps stable low thermal conductivity, and the dendritic silicon dioxide can be used as a skeleton support and keeps the stability and durability of the whole low-thermal-conductivity ceramic.

The invention relates to the technical field of purification devices, and discloses a hyperfine silicon carbide micro-powder cleaning and purifying device and a purifying method.The hyperfine silicon carbide micro-powder cleaning and purifying device comprises a separation box, an impurity removal mechanism is arranged on the separation box, and the impurity removal mechanism comprises T-shaped separation grooves formed in the inner wall of the front face and the inner wall of the back face of the separation box; t-shaped sliding blocks are slidably mounted in the two T-shaped separation grooves correspondingly, fixing blocks are slidably mounted on the two T-shaped sliding blocks correspondingly, and the ends, close to each other, of the two fixing blocks extend out of the two T-shaped sliding blocks correspondingly. Silicon carbide particles falling on the inner wall of the bottom of the impurity removal round box can be continuously turned up in the plane rotation process of the impurity removal round box, so that impurity removal holes in the bottom of the impurity removal round box are prevented from being blocked by impurities, and the silicon carbide particles can be turned up in a small range through movement of the impurity removal round box; therefore, surface damage of the silicon carbide particles caused by mechanical force generated by movement of the impurity removal round box is reduced, and the overall strength and durability of the silicon carbide particles are maintained.

The repairing and spraying method comprises the steps that the surface area of the thermal barrier coating is divided into a repairing area, an outer ring area and an outer area, the repairing area is the area where the damaged part of the thermal barrier coating is located, the outer ring area is arranged around the repairing area, and the outer area is arranged around the outer ring area; shielding the external area by using a shielding material; the metal substrate in the repairing area is completely exposed through sand blasting treatment, and a slope of 30-60 degrees is formed in the outer ring area through sand blasting treatment; the shielding material is removed, and dry ice is used for cleaning the repairing area and the outer ring area; and spraying bonding raw material powder on a slope position, which is 4-6mm away from the edge of the repairing area, as an initial position, covering the repairing area and the outer ring area, stopping spraying the bonding raw material powder, switching to ceramic powder, and spraying the thickness of the repairing area and the outer ring area until the thickness of the repairing area and the thickness of the outer ring area are flush with the thickness of the periphery of the outer area.

The invention discloses a series green and environment-friendly mortar formula suitable for northwest climate, and particularly relates to the technical field of mortar, the series green and environment-friendly mortar formula comprises the following components: 100-250 parts of cement, 20-30 parts of attapulgite powder, 20-30 parts of boric sludge, 150-250 parts of natural sand, 10-20 parts of reinforcement powder, 5-10 parts of polysiloxane elastomer, and 2-4 parts of itaconic acid. The prepared mortar is better in breaking strength, corrosion resistance and water resistance, meanwhile, the mortar can be toughened and enhanced, the shrinkage resistance of the mortar is improved, early-stage shrinkage cracking is reduced, then the prepared mortar can effectively slow down the evaporation speed of water, the wettability of the mortar is kept, and the water resistance of the mortar is improved. The mortar prepared by the invention has better weather resistance, can resist strong sunlight, high temperature, low temperature and other extreme weather conditions in northwest regions, keeps the long-term stability and durability of the mortar, and can prevent the mortar from being frozen and damaged under the severe cold weather condition in winter in northwest regions.

The utility model discloses an ultrahigh frequency reader-writer integrating multiple functions, which relates to the technical field of ultrahigh frequency reader-writers, comprises a reader-writer and a plastic shell arranged on the surface of the reader-writer, and is characterized in that four radio frequency interfaces are arranged in the A direction of the plastic shell and are used for being connected with an ultrahigh frequency antenna according to actual requirements; an IO interface, a serial port and a USB interface amp are arranged in the B direction of the plastic shell. The ultrahigh frequency reader-writer integrating multiple functions has the advantages that the ultrahigh frequency reader-writer integrating multiple functions has multiple beneficial effects, so that the ultrahigh frequency reader-writer has high flexibility and reliability in practical application, firstly, the plastic shell is unique in design, four radio frequency interfaces are arranged in the A direction, and the ultrahigh frequency reader-writer can be connected with an ultrahigh frequency antenna according to needs; an IO interface, a serial port and a USB interface amp are respectively arranged in the B direction; according to the reader-writer, power supply communication is realized, and a communication mode can be selected through the dial switch, so that the reader-writer can adapt to different communication requirements, and the application range and the compatibility of the reader-writer are improved.

The present invention discloses a capacitive flexible touch screen based on boron nitride and a preparation method thereof. The capacitive flexible touch screen includes a multifunctional film layer, a flexible film cover, a polarizer, a transparent insulating boron nitride-based touch electrode module, a film encapsulation layer, a flexible support layer, a buffer layer and a flexible metal layer from top to bottom; the transparent insulating boron nitride-based touch electrode module includes a first boron nitride layer, an upper indium tin oxide film, a second boron nitride layer, a fifth optically transparent adhesive OCA layer, a third boron nitride layer, a lower indium tin oxide film and a fourth boron nitride layer from top to bottom; the first boron nitride layer, the second boron nitride layer, the third boron nitride layer and the fourth boron nitride layer are all hexagonal boron nitride layers. The capacitive flexible touch screen based on boron nitride of the present invention has high transparency, good electrical insulation and strong chemical stability, and has high performance and reliability.

The invention provides a BODIPY light-caged chemiluminescent molecule. The structure of the BODIPY light-caged chemiluminescent molecule is shown as a formula (I): # imgabs0 # (I), wherein the number of the imgabs is 1 #. The BODIPY light-caged chemiluminescence molecule can generate a chemiluminescence signal under an illumination condition, the luminescence process is simple to operate, and the BODIPY light-caged chemiluminescence molecule has the characteristics of high luminescence brightness and good chemical stability. Based on the BODIPY light-caged chemiluminescent molecule, the invention also provides a method for synthesizing the BODIPY light-caged chemiluminescent molecule, and an application of the BODIPY light-caged chemiluminescent molecule in chemiluminescence immunoassay. The invention also provides a BODIPY light-caged chemiluminescent nano-microsphere, and the BODIPY light-caged chemiluminescent molecule Bsa-CPMs is loaded in the polystyrene nano-microsphere PS by adopting a swelling method. The invention further provides a preparation method of the BODIPY light-caged chemiluminescent nano-microsphere. The invention also provides an application of the BODIPY light cage chemiluminescence nano-microsphere in chemiluminescence immunoassay.

The invention discloses a polymer printing material and a synthesis method thereof. The polymer printing material comprises the following raw materials in percentage: 25% of polyether polyol, 23% of polymerase polyol, 28% of diphenylmethane diisocyanate, 5% of an organic tin catalyst, 1% of a dihydric alcohol chain extender and 15% of a solvent. The polymer printing material prepared by the invention is a polyurethane material synthesized by combining the polyether polyol, the polyester polyol, the diphenylmethane diisocyanate, the organic tin catalyst, the dihydric alcohol chain extender and the solvent, and has very high flexibility, tensile strength and tear strength; the completeness and durability of an image can be kept after printing, so that the friction resistance, the washing resistance and the light fastness after printing are improved, and an effective application effect is achieved.

The utility model discloses a water-repellent zipper which comprises a first zipper tape and a second zipper tape which are oppositely arranged, and zipper teeth are arranged on the edges of the first zipper tape and the second zipper tape respectively. The zipper head is matched with zipper teeth on the first zipper belt and the second zipper belt and used for controlling opening and closing operation of the zipper. The outer edges of the upper end face and the lower end face of each zipper tooth are respectively provided with a layer of rubber ring, the rubber rings are directly fixed to the surfaces of the outer edges of the zipper teeth through a thermal forming technology, and the rubber rings are firmly connected with the zipper teeth through the material viscosity of the rubber rings. The zipper is suitable for application scenes requiring short-time water-repellent performance, such as backpacks, sportswear, outdoor articles and the like, moisture permeation can be effectively prevented on the premise of low cost, and meanwhile opening and closing smoothness and durability of the zipper are kept.

The invention relates to the technical field of elastic floor tile materials, in particular to an elastic floor tile material prepared based on silicone rubber modification and a preparation method of the elastic floor tile material. Maleic anhydride grafted polypropylene and ethylene propylene rubber serve as main raw materials to prepare an elastomer base material, and a compact cross-linked network structure can be formed in the material; the high-strength elastic base material can effectively resist the impact of external force; in the preparation process of the floor tile material, raw materials and processes which are harmless to human bodies are adopted, so that the floor tile material is soft and comfortable in surface touch feeling, does not cause irritation or harm to skin, and is particularly suitable for places needing to frequently contact with the human bodies; therefore, the elastic floor tile material prepared based on silicone rubber modification has excellent physical and mechanical properties, excellent weather resistance, environmental protection, safety, diversified application scenes and personalized customization capability.

The invention provides a post-cast strip independent supporting system convenient for joint treatment and fractional erection. The post-cast strip independent supporting system is used for solving the problem that independent supporting and flexible erection cannot be realized in the prior art. The device comprises a fixed formwork, a movable formwork and an additional formwork, the fixed formwork is fixed to the two sides of the post-cast strip through a support, the movable formwork is arranged on the side, close to the post-cast strip, of the fixed formwork, the additional formwork is fixed to the upper portion of the movable formwork, and the additional formwork is connected with the post-cast strip. The additional formwork enables the solidified concrete to form a tongue-and-groove communicated with the post-cast strip, a connecting formwork is arranged below the post-cast strip, and after the movable formwork and the additional formwork are detached, the two ends of the connecting formwork abut against the fixed formworks on the two sides of the post-cast strip respectively. According to the method, the tongue-and-groove is formed by the solidified concrete through the additional formwork, the tongue-and-groove can be better combined with new concrete during follow-up pouring, the defects at the joint are reduced, the flatness and attractiveness of the joint are improved, the integrity and durability of the structure are kept, and the interior is solid and the exterior is attractive.

The utility model discloses a self-locking opening packaging box which is used for packaging products. The packaging box comprises an upper box, an inner periphery and a pressing structure, and the upper box covers the inner periphery and is connected with the inner periphery in a matched mode through the pressing structure; the inner periphery is provided with a mounting hole, the pressing structure is fixed on the inner periphery through the mounting hole, the upper box is provided with a fixing hole, the pressing structure is provided with a movable pressing part, the pressing part has a first position state and a second position state, and when the pressing part is in the first position state, the pressing part is in the second position state. When the pressing part is in the first position state, the top surface of the pressing part is flush with the surface of the inner enclosure, so that the inner enclosure and the upper box are unlocked, and when the pressing part is in the second position state, the top surface of the pressing part protrudes out of the fixing hole, so that the inner enclosure and the upper box are locked.

The utility model discloses a metal product cutting device, and particularly relates to the technical field of metal product processing, which comprises a working table, a moving component arranged in the working table, a vertical plate arranged on one side of the top end of the working table, a metal product fixing component arranged in the vertical plate through a mounting cavity, and a mounting frame arranged at the other end of the working table, an auxiliary assembly is arranged on one side of the mounting frame, a cutter is arranged in the mounting frame, and a chipping storage box is arranged at the top end of the workbench. By arranging the auxiliary assembly, the temperature of a cutting area can be effectively reduced through cooling liquid, the influence of heat on a metal product and the cutter is reduced, the sharpness and durability of the cutter can be maintained, thermal deformation is reduced, and the service life of the cutter is prolonged; and meanwhile, chippings generated in the cutting process are collected through the draught fan, the problem that the chippings are scattered and accumulated in the cutting process is solved, the injury risk possibly encountered when an operator cleans the chippings is avoided, and the safety of a working place is improved.

The wearable exoskeleton is characterized in that upper limb supporting units are fixed to the left side and the right side of a trunk fixing unit respectively, two lower limb supporting units are fixed to the lower portion of the trunk fixing unit, double-tube-shaped buckles are arranged at wrist joints of the upper limb supporting units and thighs of the lower limb supporting units, and infrared detectors are arranged close to the double-tube-shaped buckles; the first hoop and the second hoop of the double-tube-shaped buckle are oppositely arranged, the outer sides of the first hoop and the second hoop abut against pressing pieces, and the inner sides of the first hoop and the second hoop are provided with nylon bandages. The wearable exoskeleton brings comprehensive limb support through the integrated design of the wearable exoskeleton, so that the strength and endurance of the user are enhanced. The double tubular buckles are used in cooperation with the nylon bandages, so that a rapid and accurate adjusting mechanism is provided to adapt to different body types, and the wearing stability and comfort are guaranteed. The integration of the infrared detector further improves the intelligent level of the operation, and realizes the accurate response to the user action. The exoskeleton system mainly can achieve quick wearing, and in addition, convenient, safe and comfortable use experience is provided.

The invention discloses a single-layer effect alkali-decrement light-weight quick-drying antibacterial weft knitting fabric and a production method thereof. The single-layer effect alkali-decrement light-weight quick-drying antibacterial weft knitting fabric is formed by interweaving 40S microporous blended yarns and 50D / 36F Dupont SORONA two-component fully-drawn polyester FDY (Fully Drawn Yarn) filaments, wherein the 40S microporous blended yarns are woven with the 50D / 36F Dupont SORONA two-component fully-drawn polyester FDY filaments; the microporous blended yarn covers 50D / 36F Dupont SORONA two-component fully-drawn polyester FDY filaments and is formed by interweaving through a fine weaving process, and a plain front coil layer and a plain back coil layer are formed; the yarn weight ratio of the 40S microporous blended yarns to the 50D / 36F Dupont SORONA two-component fully drawn polyester FDY filaments is (70%-74%): (26%-30%); according to the single-layer effect alkali-decrement lightweight quick-drying antibacterial weft-knitted fabric, the processes of alkali decrement, acid pickling, antibiosis and the like are carried out in the dyeing and finishing process, so that the surface touch of the fabric is softer and more skin-friendly, a cloth cover style between two hues is formed, in addition, the single-layer effect alkali decrement lightweight quick-drying antibacterial weft-knitted fabric is endowed with the functions of light weight, quick drying, antibiosis, deodorization, moisture absorption and breathability, and the fabric is more comfortable and healthy to wear.

The utility model discloses a portable three-dimensional support for a mobile secondary radar, relates to the technical field of radar installation, and solves the technical problems that an existing mobile secondary radar installation support cannot simultaneously fix a plurality of devices, and is heavy and poor in portability. The support comprises a support body, the support body comprises four supporting columns, the top ends of the supporting columns are connected with a hollowed-out top plate, the bottom ends of the supporting columns are connected with a hollowed-out bottom plate, and mounting holes are formed in the front face, the back face, the top face and the bottom face of the support body. The support can support and fix a plurality of devices simultaneously or respectively, and is light in weight, high in structural strength, good in stability and convenient to install.

The utility model discloses a G68 type rim cover which comprises a rim cover body, the rim cover body comprises a connecting part, a first mounting part and a second mounting part are symmetrically arranged on the two sides of the connecting part, the end of the first mounting part and the end of the second mounting part are each of an inclined protruding structure, and assembling parts are arranged on the back face of the first mounting part and the back face of the second mounting part. The wheel rim cover body is assembled with the automobile hub through the assembly part, and the wheel rim cover body has certain attractiveness; the rim cover is made of high-strength plastic or carbon fibers, and the structural strength and durability are kept while the weight of the rim cover body is reduced.

The invention discloses a solid waste-based modified anti-seepage grouting material for a solid waste stockpiling yard in a fracture zone area as well as a preparation method and application of the solid waste-based modified anti-seepage grouting material, and the anti-seepage grouting material is prepared from the following components in parts by weight: 10-50 parts of activated electrolytic manganese residues, 5-25 parts of a silicate composite cementing material, 1-15 parts of modified bentonite, 60-95 parts of sulphoaluminate cement and 90-150 parts of water. The anti-seepage grouting material disclosed by the invention has the characteristics of excellent operability, long-term anti-seepage performance and the like, can form a continuous and compact anti-seepage barrier for a long time, can continuously provide efficient physical and chemical barrier functions under complex geological conditions and variable environments, and realizes long-term protection on underground water and surrounding ecological environments.

The utility model discloses a breathable polyester filament yarn, belongs to the technical field of textiles, and solves the problems that chemical fibers are obtained in a hot melt spinning or wet spinning mode, the structure of the chemical fibers is relatively compact, and fine pores are not formed so that air can penetrate through the chemical fibers to circulate, so that the breathable effect of the chemical fibers is ensured. Comprising an inner ring part, an outer ring part coaxially arranged on the outer circle of the inner ring part and a plurality of connecting parts connecting the inner ring part and the outer ring part, a hollow part is formed in the inner circle of the inner ring part, an outer hollow part is formed between every two adjacent connecting parts, a plurality of first through holes communicated with the outer hollow parts are formed in the outer ring part, and second through holes communicated with the adjacent outer hollow parts are formed in the connecting parts. And a through hole III for communicating the outer hollow part with the inner hollow part is formed in the inner ring part. The polyester filament yarn is composed of the inner ring part, the connecting part and the outer ring part which are integrally formed, air circulation is achieved through the through holes in all the parts, the filament yarn is endowed with good air permeability, and the polyester material has enough holes for air permeability.

The invention relates to the field of buildings, and particularly discloses high-durability concrete and a preparation method thereof.The concrete is prepared from cement, fly ash, steel slag, coarse aggregate, fine aggregate, silica fume, lithium slag, an additive, water and modified fibers; wherein the modified fiber is prepared by performing pressure impregnation on polylactic acid fiber in a low-boiling-point solvent, coating the polylactic acid fiber with an inner coating layer, mixing the polylactic acid fiber with sodium peroxide, and coating the mixture with an outer coating layer to form a porous outer wall coating layer; the preparation method comprises the following steps: S1, mixing and stirring the cement, the fly ash, the coarse aggregate, the fine aggregate, the steel slag, the lithium slag and the silica fume, and then adding the modified fibers to prepare a primary mixture; s2, mixing water and an additive, then adding the primary mixture prepared in the step S1, and mixing and stirring to obtain the concrete with better strength and durability.

The invention discloses a smooth quartzite plate with soft touch feeling and a manufacturing process of the smooth quartzite plate. The quartz stone plate is prepared from the following components: quartz sand, quartz powder, aluminum oxide, ultra-high molecular weight polyethylene, modified resin and an auxiliary agent according to a certain proportion. Wherein the modified resin is prepared by blending glass fiber and acrylic resin according to a ratio of 1: (7-9), and the auxiliary agent is prepared by blending white slurry, a curing agent and a coupling agent according to a ratio of 1: (2-3): (1-2). The quartz stone plate which is smooth and flat in surface, soft in touch feeling, capable of effectively resisting abrasion in use during application and capable of keeping attractive appearance and durability can be manufactured.