37results about How to "Moderate modulus of elasticity" patented technology

The invention discloses a bamboo sleeper assembled to be formed. The bamboo sleeper is obtained in the modes that a bamboo unit is taken as a raw material, dried and modified at 110-180 DEG C, subjected to cladding treatment through a dopamine solution, impregnated, solidified to be formed, assembled and glued, solidified again, retreated through the dopamine solution, subjected to mould-proof and / or anti-corrosion and / or insect-proof treatment, and tightened. The invention further provides a preparation method of the bamboo sleeper. The prepared bamboo sleeper is environmentally friendly andsuitable for ballast rails of railway and urban rail transit.

The invention discloses a once integral-molded bamboo sleeper. The once integral-molded bamboo sleeper uses bamboo units as raw materials for drying and modification in overheated water vapor with a superheat degree of 10-80 DEG C, impregnation, whirl coating, curing, dopamine solution treatment, mould-proof and / or antiseptic and / or insect-proof treatment and fastening to obtain a finished product; and the density of the once integral-molded bamboo sleeper is 0.9-1.5 g / cm3. The invention further provides a preparation method of the bamboo sleeper. The prepared bamboo sleeper is proper in elastic modulus and suitable for ballast tracks of railways and urban railway systems.

The invention relates to the field of manufacturing of heavy trunk brake pads, in particular to a heavy truck brake pad with a man-made skeleton as a framework and a manufacturing method of the heavy truck brake pad. The porous man-made skeleton framework is made of carbon fiber toughened ceramic, a porous framework material is filled with resin, friction performance modifier, filler and the like to make a high-performance special brake pad friction material, and thus the heavy truck brake pad can adapt to a special working environment and has the advantages of being low in density, high in strength, good in heat resistance, high in friction coefficient, stable and long in service life. The heavy truck brake pad can adapt to extreme working conditions with high temperature and high loads, is suitable for high-speed heavy trucks, lifting devices for mines and the like and has huge promotional application values.

The invention belongs to the technical field of biological materials, and specifically relates to a mussel bionic binder-calcium phosphate high-strength bone repair material, a high-strength compositeCaP scaffold and a preparation method thereof. In view of the problems of insufficient strength, especially toughness, and insufficient printability and formability of bone repair materials in the prior art, the invention discloses the mussel bionic binder-calcium phosphate high-strength bone repair material and the preparation method thereof. The technical scheme is as follows: the mussel bionicbinder-calcium phosphate high-strength bone repair material is prepared from the following materials in parts by weight: 5-35 parts of a bionic binder, 65-95 parts of calcium phosphate salt and 95-105 parts of deionized water, wherein the bionic binder is prepared by dissolving 1-3 parts by weight of 3.4-dihydroxyphenylmethacrylamide in 10 parts by weight of a mixed solvent, and the calcium phosphate salt is prepared by mixing alpha-tricalcium phosphate, hydroxyapatite, calcium hydrogen phosphate dihydrate and calcium carbonate. The mussel bionic binder-calcium phosphate high-strength bone repair material is applicable to the repair of bone injury.

The invention relates to a damping rubber buffer. According to the damping rubber buffer, damping rubber is taken as a buffering medium, a compressed spring is taken as an auxiliary reset element, the damping rubber buffer structurally comprises a piston, a cylinder cap, the damping rubber, the compressed spring and a cylinder sleeve, the piston, the cylinder cap, the damping rubber and the pressure spring part are assembled wholly in the cylinder sleeve, and the components are combined into an integral structure. The damping rubber buffer can meet the technical requirement that buffers are required to be used on various vacuum circuit breaker structures.

The invention discloses a preparation method of a resin based powder metallurgy composite friction material for vehicles, wherein the preparation method comprises the following steps: 1) preparing a powder metallurgy friction material: mixing evenly a base material and a forming agent, pouring the mixture into a mold, pressing to slender rods, separating the slender rod-shaped pressed blanks, and sintering, to obtain a powder metallurgy friction material; 2) shearing, crushing and screening; 3) mixing: according to the mass percentage, evenly co-mixing 10-20% of high-temperature-resistant modified resin, 40-60% of the powder metallurgy friction material, 10-20% of a reinforcing fiber, 5-15% of an abrasive, 10-20% of a lubricating material and 5-20% of a filler; 4) producing and preparing a resin based composite friction material; 5) post-treating; and 6) carrying out mechanical processing. The resin based powder metallurgy composite friction material retains the stable friction coefficient and good anti-abrasion properties of the powder metallurgy friction material. The service life and the high-temperature stability of the friction material are improved.

The invention discloses an airport pavement structure and a pavement method for adding an asphalt layer to an old cement airport runway, including a lower viscoelastic bonding layer, a mortar layer, a gravel layer, Modified asphalt concrete overlay, upper interface bonding layer and epoxy asphalt concrete overlay; between the mortar layer and modified asphalt concrete overlay, there is a gravel layer, modified asphalt concrete overlay and epoxy The asphalt concrete overlay is bonded by the upper interface bond coat. The pavement structure of the present invention fully considers the integrity of the structure and the bonding performance between layers, evenly transmits the stress generated by the aircraft load, avoids stress concentration, has excellent overall performance, and can adapt to the heavy traffic load requirements of large aircraft , has good anti-rutting ability, and has good low-temperature crack resistance and water stability; at the same time, the pavement method of this pavement structure is easy to operate and can be mechanized.

The invention discloses an automotive iron-based powder metallurgy composite frictional material and a manufacturing method thereof. The manufacturing method includes that firstly, a basis powder material is mixed with a molding agent uniformly to obtain a mixture, the mixture is poured into a mold and is shaped into slender rods by pressing, the slender rods are compacted and separated and then charged into a sintering furnace, and the sintering furnace is heated up under protection of nitrogen gas or hydrogen gas so that an iron-based powder metallurgy friction material is obtained; secondly, the iron-based powder metallurgy friction material is subjected to processes of shearing, grinding and screening; thirdly, by mass percent, 10-20% of cashew nut oil modified phenolic resin, 30-60% of the iron-based powder metallurgy friction material, 10-20% of reinforced fibers, 5-15% of abrasives, 10-20% of lubricants and 5-20% of fillers are mixed uniformly to obtain a powder mixture, and the powder mixture is then subjected to hot press molding, is preserved at the temperature of 150-180 DEG C, cooled to the room temperature and then discharged from the furnace. The automotive iron-based powder metallurgy composite frictional material remains the stable friction coefficient and good abrasive resistance of the conventional powder metallurgy friction material, service life of the friction material is prolonged and its high-temperature stability is also improved.

The invention relates to a zirconium-based amorphous metal glass dental implant and a preparation method thereof, comprising: 30-65 parts of zirconium, 0-25 parts of titanium, 0-45 parts of copper, 0-20 parts of aluminum, silicon 0‑20 parts, 0‑10 parts of iron, 0‑10 parts of zinc, 0‑5 parts of silver, 0‑5 parts of palladium, the dental implant is an amorphous metallic glass cylindrical rod with a diameter of 2‑6mm and a length of 4‑13mm; The part of the dental implant located in the bone has a self-tapping thread structure with a pitch of 0.7-2mm and a thread depth of 0.3-0.6mm. The thread section is triangular. between the first thread and the third thread. The invention has good fracture resistance, good biocompatibility, moderate elastic modulus and certain antibacterial effect, and is a good metal implant material.

The utility model provides a heat conduction mechanism for a personal care device. The heat conduction mechanism for the personal care device comprises a heat conduction body and an installation frame, wherein the heat conduction body is fixedly installed on the installation frame; the heat conduction body is an aluminum plate; the working surface of the heat conduction body is provided with a carbon fiber layer. The personal care device which adopts the heat conduction mechanism comprises a pair of clamping components; the tail parts of the clamping components are connected in a hinging way; the heat conduction mechanism is arranged in the clamping components; a heating body is built in the heat conduction mechanism; and the heat conduction mechanism contacts with the heating body. According to the heat conduction mechanism for the personal care device and the personal care device, when the aluminum plate is combined with carbon fiber; the advantages of the aluminum plate, i.e. easiness in shaping, low processing requirements and low material cost are utilized; and for example, when the aluminum plate of which the surface is attached with the carbon fiber is adopted as the working surface, the advantages of the carbon fiber such as self-lubrication, high strength, moderate elastic modulus, good heat resisting performance, low weight, small expansion coefficient and wear resistance are utilized.

The invention discloses a method for producing a resin-based powder metallurgy potassium titanate fiber friction material used for vehicle. The method comprises the following steps: uniformly mixing a matrix powder material and a forming agent, dumping a mixture into a die, compacting the mixture to several elongated rods, compacting the elongated rods, separating the elongated rods, putting the elongated rods in a sintering furnace, under condition of introducing nitrogen or hydrogen, heating the materials to obtain a Fe-based powder metallurgy friction material; shearing the Fe-based powder metallurgy friction material, crushing the Fe-based powder metallurgy friction material, and sieving; by metering with mass percentage, uniformly mixing 10-20% of cashew oil-modified phenolic resin, 30-50% of the Fe-based powder metallurgy friction material, 10-30% of potassium titanate fiber, 5-15% of an abrasive, 10-20% of a lubrication material, and 5-20% of a filling material; performing hot press molding on the materials, cooling the materials, and discharging. The friction material combines the characteristics of high temperature resistance and low abrasion of the Fe-based powder metallurgy friction material as well as good toughness and low hardness of the potassium titanate resin-based composite friction material, and the obtained material has the characteristics of high temperature resistance, low abrasion, good toughness, and low hardness.