22results about How to "High rebound rate" patented technology

The invention relates to the technical field of metal sliding bearings, and provides a liquid metal sliding bearing with high sealing performance, which comprises a mandrel, a graphite sealing assembly, a flange and a shaft sleeve, and further comprises a ternary gallium-based liquid metal and a silicon carbide ceramic coating, wave-shaped check rings are arranged among the multiple graphite rings at intervals, initial contact loads are provided through the wave-shaped check rings, the graphite rings and the flange are tightly attached, static sealing with excellent performance is formed in the static state, and the fit clearance between the mandrel and the shaft sleeve is filled with ternary gallium-based liquid metal. A silicon carbide ceramic coating is plated at the matching position of the mandrel and the flange, and a silicon carbide ceramic coating is also plated at the matching position of the mandrel and the shaft sleeve. By using the graphite ring, the ternary gallium-based liquid metal and the silicon carbide ceramic coating, the liquid metal has good fluidity, so that the interface can be fully filled, the liquid metal is not easy to volatilize, the lubricating effect is better, the friction factor is low, and the wear resistance is better.

The invention belongs to the technical field of civil engineering materials, and particularly relates to a lightweight jet engineering cement-based composite material as well as a preparation method and application thereof. The lightweight jet engineering cement-based composite material comprises the following components: cement, fly ash, silica fume, hollow fly ash microspheres, water, organic fibers, a water reducing agent and a thickening agent. According to the invention, by optimizing the raw material ratio, not only is the density of the jet ECC significantly reduced and the lightweight of the material realized, but also the fluidity, the adhesion property and the mechanical property of the material are greatly improved, and the problems of poor adhesion, high rebound rate and limited jet thickness of the traditional jet ECC are solved; in the spraying process, the cement-based composite material shows low rebound rate and large spraying thickness, and a light spraying engineering cement-based composite material with excellent performance is provided for engineering application.

A manual cardio-pulmonary resuscitator capable of controlling the pressing depth comprises a pressing device body, a bandage, a supporting rod and a back plate, the pressing device body comprises a bottom plate and a pressing rod, a through hole is formed in the bottom plate, the pressing rod is arranged in the through hole in a penetrating mode, and a pressing head is arranged at the bottom of the pressing rod; the top ends of the left support rod and the right support rod are detachably connected with the left end and the right end of the bottom plate respectively, and the bottom ends of the left support rod and the right support rod are supported at the left end and the right end of the back plate respectively; the left end and the right end of the bottom plate are connected with a left bandage and a right bandage respectively, the upper end of the left bandage and the upper end of the right bandage are detachably connected with the left end and the right end of the bottom plate respectively, and the bottom end of the left bandage and the bottom end of the right bandage are detachably connected with the back plate respectively. The manual cardiopulmonary resuscitator capable of controlling the pressing depth is small in size, light in weight, capable of guaranteeing the pressing depth and capable of being applied to various first-aid places.

The invention discloses a water-swelling elastic plugging agent for a water-based drilling fluid and a preparation method of the water-swelling elastic plugging agent. The water-swelling elastic plugging agent comprises the following components in parts by weight: 100 parts of a polyolefin elastomer matrix material; 15 to 20 parts of a reinforced matrix material; 0.8 to 1.5 parts of a polyolefin elastomer matrix material cross-linking agent; 8 parts to 15 parts of a reinforcing agent A; 20 to 30 parts of a reinforcing agent B; 15 to 30 parts of super absorbent resin; 15 to 20 parts of a plasticizer; 0.2 to 0.8 part of an isolating agent; 0.5 to 1 part of an anti-aging agent; the plugging agent provided by the invention is simple in preparation process, not only is beneficial to industrial production, but also is convenient to prepare plugging slurry on site, can achieve a good plugging effect, and provides an effective technical means for well leakage treatment.

The utility model relates to the technical field of shoes, in particular to a high-strength springback slipper which comprises a sole, a vamp, an insole and a carbon fiber elastic piece, the sole and the vamp are integrally formed by EVA materials, the insole is also made of the EVA materials, the carbon fiber elastic piece and the insole are sequentially bonded to the top face of the sole, and the carbon fiber elastic piece is arranged on the top face of the sole. According to the slipper, the carbon fiber elastic sheet is compounded with the sole and the insole which are made of the EVA material, and the high-modulus material performs mechanical enhancement and pressure dispersion on the low-modulus matrix, so that the slipper has relatively high compressive strength, the slipper can still keep stable supporting force after being used for a long time, and the comfort requirements of scenes such as exercise recovery and long-time standing are met.

The invention relates to the technical field of graphite materials, and particularly discloses graphite for a friction material as well as a preparation method and application of the graphite. The graphite for the friction material is prepared from the following raw materials in parts by weight: 10000 + / -20 parts of a carbon material, 4900-9900 parts of sulfuric acid, 9900-29700 parts of organic acid and 60-80 parts of filler, wherein the weight ratio of the carbon material to the organic acid to the sulfuric acid is 1: (0.99 to 2.97): (0.49 to 0.99); the carbon material is one of a coke carbon material or a graphite carbon material; the filler comprises 24-28 parts of modified iron powder, 12-14 parts of sodium bicarbonate powder and 30-32 parts of a hole sealing agent; the organic acid is one of acetic acid, oxalic acid or citric acid; the preparation method comprises the following steps: mixing the organic acid and the sulfuric acid, adding the carbon material, mixing, washing to be neutral, drying, calcining, graphitizing, adding the sodium bicarbonate and the iron powder, uniformly mixing, adding the hole sealing agent, and uniformly mixing. The graphite for the friction material can be used for preparing the friction material, and has the advantages of improving the rebound rate of the elastic graphite and further meeting the use requirements of the friction material.

The present invention provides a fabric with high resilience, a processing device and a preparation method, and relates to the field of textile technology. The processing device for the fabric with high resilience, the fabric with high resilience is obtained by interweaving an upper fabric and a lower fabric, then retreating with hot water and drying. In the present invention, after retreating, the first inner weft and the first outer weft become thinner, and the second outer weft and the second inner weft are retreated, so that the remaining warp yarn and weft yarn in the fabric structure have a higher buckling rate, and the fabric has better fluffiness, drape and elasticity. The cross-sectional shape of the water-soluble vinyl fiber is set to an octagonal star shape, so that coarser fibers can be obtained with less raw materials, making the fabric fluffier. By setting a pressure detection component in conjunction with a valve component, the filter screen can be found to be blocked in time, and the group of channels can be closed in time by the valve component to avoid the production of a large number of defective products. The alarm of the controller can remind the staff to perform maintenance in time.

The application relates to the technical field of court surface layers, in particular to a high-weather-resistance composite silicon PU court surface layer and a construction method thereof. The high-weather-resistance composite silicon PU court surface layer comprises, from bottom to top, a waterproof bottom coating layer, a silicon PU material layer, a winter polyurea reinforcing layer and a water-based surface paint layer. The waterproof bottom coating is used as a bottom sealing material, the silicon PU material is used as a bottom layer, the winter polyurea material is used as a reinforcing layer, and the water-based surface paint is used as a color layer, so that a novel court surface layer with good weather resistance, high rebound rate, excellent performance and super-long service life is obtained; the service life of the novel court surface layer is more than 10 years, excellent physical properties are maintained, and defects such as low service life, poor rebound, poor impact absorption, poor wear resistance, easy pulverization, high cost and complex construction of ordinary courts are effectively overcome, and the knee joint safety and body health of athletes are fully protected.

The present invention provides a photocurable 3D printed part and its application in a foaming material. The photocurable 3D printed part of the present invention is an elastomer obtained by photocurable 3D printing, and the crosslinking density of the photocurable 3D printed part is 0.001 to 10 mmol / cm 3 , and the glass transition temperature is lower than 30°C.

This invention relates to the fields of fine chemicals and polymer materials technology, specifically a method for manufacturing toy adhesives. It includes steps for preparing the adhesive base material, preparing borax solution, and cross-linking molding. Polyvinyl alcohol, guar gum, methylparaben, etc., are prepared as base materials, which are then reacted with borax solution to undergo a cross-linking reaction. The core of this invention is the strict limitation of specific high-temperature ranges and constant-temperature stirring times during the base material preparation process, which promotes the complete extension and entanglement of molecular chains, constructing a dense and uniform three-dimensional network structure. This invention effectively avoids microscopic particle residue and stress concentration, achieving a significant improvement in the tensile strength, elongation at break, and resilience of the toy adhesive.

The invention provides a lightweight high-elastic wear-resistant foam material for shoes, and relates to the technical field of polymer foam materials. The material comprises the following components in parts by weight: a polyamide elastomer, polyethylene-vinyl acetate resin, an ethylene-octylene random copolymer, a hydrogenated styrene-butadiene block copolymer, ionomer resin, a compatible agent SEBS-g-MAH, a wear-resistant agent, stearic acid, zinc stearate, zinc oxide, a cross-linking agent, a cross-linking assistant, a foaming agent and a filler. By adding the ionomer resin, the physical crosslinking effect among the components is enhanced, the melt strength is improved, and gas can be well locked in the melt; the ionomer resin has a special self-repairing function, so that the wear and scratch resistance is greatly improved, and compared with a shoe material prepared by a traditional EVA chemical foaming process, the shoe material has better properties of light weight, high elasticity, low wear and low compression permanent deformation rate on the basis of ensuring hardness and tear strength.

The present application relates to the technical field of graphite materials, and specifically discloses a graphite for friction material, a preparation method thereof and an application thereof. A graphite for friction material comprises the following raw materials in parts by weight: 10000±20 parts of carbon material, 4900-9900 parts of sulfuric acid, 9900-29700 parts of organic acid, and 60-80 parts of filler; wherein the weight ratio of carbon material, organic acid and sulfuric acid is 1: (0.99-2.97): (0.49-0.99); the carbon material is one of coke-type carbon material or graphite-type carbon material; the filler comprises 24-28 parts of modified iron powder, 12-14 parts of sodium bicarbonate powder and 30-32 parts of sealing agent; the organic acid is one of acetic acid, oxalic acid or citric acid; and the preparation method thereof is: after mixing organic acid and sulfuric acid, adding carbon material, mixing and washing to neutrality, drying, calcining, graphitizing, adding sodium bicarbonate and iron powder and mixing, adding sealing agent and mixing. The graphite for friction material of the present application can be used to prepare friction material, which has the advantage of improving the rebound rate of elastic graphite, thereby meeting the use requirements of friction material.

The utility model relates to the technical field of pillows, in particular to a novel spring pillow. A novel spring pillow comprises a pillow body, the pillow body sequentially comprises a keel, an inner pillowcase and an outer pillowcase from inside to outside, the keel is wrapped in the inner pillowcase, the inner pillowcase is wrapped in the outer pillowcase, a heating device is arranged between the inner pillowcase and the outer pillowcase, a plurality of connecting rings are symmetrically installed on the two sides of the keel, and the connecting rings are connected with the keel. A spring is installed between every two opposite connecting rings, interlayer pockets are arranged in the two sides of the outer pillowcase, and the interlayer pockets are filled with traditional Chinese medicine bags. The whole body is cylindrical, and is more fit with the curve of the neck of a human body; and by matching with the spring in the pillow body, the pillow has high resilience while playing a supporting role.

The present invention provides a process based on supercritical fluid foaming and hot pressing shaping, comprising the following steps: S1, adding all raw materials to a banbury mixer for mixing, and single-screw granulation to obtain composite material particles; S2, using an injection molding machine to inject and vulcanize the composite material particles to obtain a midsole embryo; S3, placing the midsole embryo in an autoclave for infiltration; S4, placing the infiltrated embryo in an oven for heating and foaming to obtain a semi-finished midsole; S5, placing the semi-finished midsole in a mold for hot pressing and shaping, and then cooling with water for 550 to 650 seconds to obtain a finished product. The present invention is simple to operate, and uses specific raw materials, proportions and processes. The obtained finished product not only has a high rebound rate and good compression permanent deformation performance, but also has excellent wear resistance and moderate hardness, and is very suitable for preparing midsole materials.

The present application relates to the field of concrete admixtures, and specifically discloses a highly efficient enhanced shotcrete admixture and its application. A highly efficient enhanced shotcrete admixture comprises the following raw materials by weight: 10-30 parts of polycarboxylic acid water reducer; 15-30 parts of plant glue; 80-110 parts of nanofiber and epoxy resin composite; 30-70 parts of accelerator; 5-10 parts of water; the nanofiber and epoxy resin composite is a composite of long-chain silane-modified nanofiber and fluorine-containing epoxy resin emulsion. By adjusting the type and dosage of each raw material, the present application obtains a high-efficiency enhanced shotcrete with a minimum rebound rate of 6.25%, which effectively reduces the rebound rate of the high-efficiency enhanced shotcrete.

The invention belongs to the technical field of aerogel heat insulation materials, and particularly relates to a preparation method of an aerogel composite porous material with a tubular structure. According to the method, elastic porous foam or sponge with a tubular structure is used as a base material, a supporting shaft of a shaft-containing mold is sleeved with the base material, an axial protective sleeve is sleeved with the base material, then the shaft-containing mold is installed on an inner cavity mold to be fixed and sealed, then enough aerogel powder is injected into the mold, then pressing is conducted, and the mold is formed. After pressing is completed, pressure relief is conducted, the mold and the base are removed, finally, redundant aerogel powder on the surface of a product is removed, and the tubular aerogel composite porous material can be obtained. According to the invention, the problems of non-uniform size and shrinkage of tubular foam in the processes of dipping, gelling and supercritical drying in a traditional aerogel manufacturing method can be avoided, and the problem that a low-melting-point porous base material cannot resist the supercritical drying temperature and cannot be manufactured can be solved.

The present disclosure discloses a low-odor high-resilience polyurethane foam and a preparation method thereof, and relates to the field of foam preparation. The low-odor high-resilience polyurethane foam comprises a polyol side composition and an isocyanate component. The polyol side composition comprises, based on 100 parts by mass of the polyether polyol in the polyol side composition: 2-5 parts by mass of open-cell polyether, 1-2 parts by mass of diethanolamine, 0.2-0.5 parts by mass of low-odor low-cyclic polyether modified silicone oil, 0.3-0.5 parts by mass of a reactive composite catalyst, 0.3-0.7 parts by mass of a low-odor gel catalyst, and 2.5-3.8 parts by mass of water. The isocyanate component is diphenylmethane diisocyanate. The ratio of the isocyanate component to the polyol side composition is 100-120 in terms of the isocyanate index. The present disclosure improves the problems of foam odor, high volatile organic compound emission, insufficient long-term odor retention, difficulty in balancing high resilience and low compression permanent set, and limited foam structure regulation means.

The utility model discloses a professional court structure which sequentially comprises a basic sealing layer, an elastic layer, a rebound reinforcing layer, a wear-resistant, non-slip and weather-resistant water-based colored surface layer and a boundary layer from bottom to top, the lower end face of the elastic layer is connected with the basic sealing layer, the elastic layer is connected with the wear-resistant, non-slip and weather-resistant water-based colored surface layer through the rebound reinforcing layer, and the boundary layer is arranged between the elastic layer and the wear-resistant, non-slip and weather-resistant water-based colored surface layer. A high-resilience elastic body is embedded in the elastic layer, the high-resilience elastic body comprises elastic bodies with different particle sizes, different shapes and different densities, and a boundary layer is arranged on the upper surface of the wear-resistant anti-slip weather-resistant water-based colored surface layer. The elastic bodies with different particle sizes, different shapes and different densities are embedded in the elastic layer, so that the lower layer part has high rebound performance so as to meet the impact absorption performance requirement of the wood floor, and the rebound reinforcing layer can increase the structural hardness of a court and improve the rebound rate, vertical deformation and other performance of a ball. The wear-resistant, slip-proof and weather-resistant colored surface layer adopts a water-based technology, so that the service life of the court is prolonged due to excellent weather resistance.

This invention relates to the field of medical materials technology, and discloses a biodegradable esophageal stent and its preparation method. The esophageal stent is woven from blended monofilaments. The raw materials for the blended monofilaments include polylactic acid, polycaprolactone, and additives, including polyethylene glycol, carbon nanofibers, star-shaped PLA-PCL block copolymer, and talc. The preparation steps are as follows: the raw materials are mixed in proportion, melt-blended and granulated, and then the blended monofilaments are obtained using a high-pressure capillary rheometer; the blended monofilaments are woven into a mesh-like stent framework on a mold using an interlaced pressing method, then heat-set, and demolded after cooling; a thermoplastic polyurethane casting liquid loaded with bioactive substances is cast into a film and coated onto the inner wall of the stent framework; the thermoplastic polyurethane film is heated to fuse with the stent framework, and after cooling, the esophageal stent is formed. The esophageal stent of this invention has good mechanical properties, controllable degradation characteristics, and biocompatibility.

This invention relates to a whole coconut husk mixed cultivation substrate and its preparation method, belonging to the field of soilless cultivation substrate technology. The beneficial effects of this invention are as follows: This invention directly crushes whole coconut husks without separating the coconut husk fibers, producing a whole coconut husk mixed cultivation substrate with a short fiber content as high as 40%~60% in one step. This overcomes the long-standing technical biases that "coconut husk fibers are difficult to crush directly" and "coconut coir should have its fibers removed as much as possible." The short fibers in the product form a three-dimensional network structure, significantly improving the substrate's aeration and root development environment, increasing crop root density by more than 50%. Simultaneously, it eliminates the fiber separation and re-mixing processes, reducing equipment investment by approximately 30% and energy consumption by approximately 40%. It utilizes ambient temperature mechanical cold pressing for desalination and dehydration, without thermochemical damage, resulting in a product with an EC value as low as 0.5~1.5 mS / cm and a resilience rate ≥99%, combining excellent cultivation performance, simplified process, and convenient storage and transportation.

The invention belongs to the technical field of shoes, and discloses a cushioning layer-by-layer propelling sole and a shoe, the cushioning layer-by-layer propelling sole comprises a midsole structure and a large bottom piece, the midsole structure comprises a heel part, a palm part and a midsole piece, and the heel part, the palm part and the midsole piece are sequentially stacked from bottom to top; the sole part and the insole sheet cover the sole, and the heel part extends from the heel to the middle of the foot; the rebound rates of the heel part, the palm part and the insole piece are sequentially increased; the heel part and the palm part are arranged on the large bottom piece, and an anti-skid structure is arranged on the side, away from the insole structure, of the large bottom piece. The shoe comprises the cushioning layer-by-layer propelling sole, and the rebound rate of the half sole and the stability of the heel are increased by increasing the rebound rate of the heel part, the rebound rate of the sole part and the rebound rate of the insole piece in sequence.

The utility model discloses a rubber production vulcanization mechanism, include: mechanism base, mechanism shell and longitudinal displacement power shell, the utility model relates to rubber processing equipment technical field, this mechanism through the vulcanization coupling structure of down -pressing type, has realized the efficient vulcanization of rubber raw material in mechanism shell: through vertical pressure technology ensures that the rubber compound is heated evenly, significantly improves the vulcanization efficiency, after vulcanization, the equipment can switch to refrigeration mode quickly, utilizes the minimum material displacement and realizes the cooling solidification, and the seamless connection of this hot -cold technology has three big advantages: first, shortens the vulcanization -cooling conversion period, and production efficiency can be promoted, second, avoids the product deformation risk caused by traditional handling, third, through accurate temperature control strengthens rubber molecular crosslinking structure, and the finished product physical performance index (such as tensile strength, resilience) is greatly promoted, especially suitable for the stable production of high -precision rubber products.