30results about How to "Improve compression resistance" patented technology

The microporous polyolefin film produced by drawing a gel molding containing a polyolefin and a solvent for film formation in at least a uniaxial direction, performing thermofixing treatment, removing the solvent for film formation and once more drawing the molding in at least a uniaxial direction has large pore diameter and excels in air permeability, mechanical strength and compression resistance.

The invention relates to a bacterial cellulose / polypyrrole / polyurethane flexible multifunctional conductive composite material and a preparation method thereof. The composite material is prepared by taking a bacterial cellulose material crosslinked by a silane coupling agent as a matrix material, and polypyrrole, coated polyurethane and a three-proofing finishing agent are grown in situ in sequence. When the obtained bacterial cellulose / polypyrrole / polyurethane porous composite material is used as an electric heating material to be used on clothes, the functions of electric heating, heat preservation, hydrophobicity and air permeability are achieved.

The invention relates to a method for replacing the hoisting ropes of an elevator. By the method of the invention, the hoisting ropes (4) are replaced by first joining the old and new hoisting ropes (4a, 4b) together by their one ends by splicing the ends together around a common core strand (17), whereupon the new set (4b) of hoisting ropes is pulled into place by means of the old set (4a) of hoisting ropes.

The invention discloses a heat insulation fireproof wallboard which comprises a base layer, an inner fiber board layer attached to the base layer, a heat insulation layer attached to the inner fiber board layer, a vacuum layer attached to the heat insulation layer, a protective layer attached to the vacuum layer, an outer fiber layer attached to the protective layer, a waterproof layer attached to the outer fiber board, and a reflective layer attached to the waterproof layer. The heat insulation fireproof wallboard has the excellent fireproof performance, is extinguished right after being deviated from fire, and is high in toughness and strength and excellent in heat insulation effect.

The invention discloses a flame-retardant environment-friendly foamed plastic which comprises the following raw materials in parts by weight: 32-37 parts of ethylene-vinyl acetate (EVA) resin, 68-72 parts of polycaprolactone (PCL), 2.8-3.2 parts of soybean meal, 2.7-3.6 parts of wood fibers, 1.2-1.7 parts of a titanate coupling agent NDZ-TTS, 3-3.6 parts of sodium lactate, 13-17 parts of a foaming agent ADC, 8-12 parts of zinc oxide, 9-10 parts of citric acid, 11-14 parts of sodium hydrogen carbonate, 1.6-1.9 parts of diisononyl phthalate (DINP), 2.2-2.7 parts of epoxy octyl stearate, 23-28 parts of barite powder, 15-18 parts of augite powder, 7-11 parts of white carbon black, 5-9 parts of mica powder, 3-6 parts of ammonium polyphosphate, 5-8 parts of melamine sodium polyphosphate, 1.5-1.8 parts of 2,6-di-tert-butyl-4-methylphenol (BHT) and 1.3-1.6 parts of an antioxidant BLE.

The invention relates to the field of functional magnetic sealing composite materials, and in particular provides a high pressure-resistant magnetic rubber sealing composite material and a preparation method thereof, which is mainly characterized by nitrile rubber, neoprene and magnetic powder and reinforcement, Composition of vulcanization and protection system, mixed by internal mixer and vulcanized by vulcanizer, the magnetic rubber sealing composite material has excellent dynamic sealing and static sealing, good solvent resistance, high resistance to pressure change, relatively Good thermal stability, magnetic stability and other characteristics.

A hollow tubular foam spring (10) having a plurality of radially extending holes (20) extending from an outer surface (30) towards a central hollow core (40). The tubular foam spring (10) is arrangedwith wall thickness and diameter to height ratios such that center bulging is achieved under compressive loads. In an embodiment, such as in a mattress, seat, cushion or pillow, springs (10) are arranged in an array whereby some impinge upon one another due to central bulging.

The present invention provides a polymer microcatheter with regular arrangement of two-dimensional flaky fillers in the microcosm and a preparation method thereof. Mix uniformly according to a certain ratio; (2) extrude the mixture obtained in step (1) through a high-performance polymer pipe preparation device with application number 200810045785.9, and obtain a two-dimensional flaky filler in the microscopic form. Aligned polymeric microcatheters. The polymer microcatheter has regular arrangement of two-dimensional sheet-like fillers in the radial direction, has excellent compression resistance and barrier performance, and has a simple process flow for its preparation method, can be produced continuously, and has industrialization prospects.

The invention relates to a bacterial cellulose / polypyrrole / polyurethane flexible multifunctional conductive composite material and a preparation method thereof. Covered with polyurethane and three-proof finish. The obtained bacterial cellulose / polypyrrole / polyurethane porous composite material has the functions of electric heating, heat preservation, hydrophobicity and breathability when used as an electric heating material on clothing.

The invention discloses a processing technology for enhancing the pressure change resistance of magnetic rubber, and relates to the technical field of magnetic rubber processing. The specific technological method comprises the following steps of: S1, preparation of magnetic fibers; S2, preparation of a skeleton material; S3, preparation of a magnetic support member; and S4, processing and preparation of the magnetic rubber. According to the processing technology provided by the invention, the compression deformation quantity of the magnetic rubber can be effectively reduced, so that the pressure change resistance of the magnetic rubber is enhanced, and the magnetic rubber has more excellent sealing performance.

The invention discloses an elastic fireproof wallboard which comprises a base layer, a frame layer, an adhesive layer, a plastering mortar layer, an insulation layer, a latex layer, a decorative coating and an abrasion-resistant layer. The base layer is covered by the frame layer. The frame layer is composed of a plurality of workpieces which are arranged in parallel or in a staggered mode and form filling cavities. The filling cavities are filled with filler. The frame layer is covered by the adhesive layer. The adhesive layer is covered by the plastering mortar layer. The plastering mortar layer is covered by the insulation layer. The insulation layer is covered by the latex layer. The upper surface of the latex layer is coated with the decorative coating made of decorative paint. The upper surface of the decorative coating is coated with the abrasion-resistant layer made of transparent abrasion-resistant paint.

The invention discloses a fiber-reinforced rubber elastic body composite material with good compression resistance, which includes a rubber matrix, fibers, and a thermosetting welding agent, and the thermosetting welding agent can promote spontaneous welding of fibers randomly dispersed in the rubber matrix during processing In essence, a three-dimensional network skeleton structure composed of thermosetting solder and fibers independent of the rubber matrix is ​​formed; the thermosetting solder is a variety of thermosetting resins, which are flowing liquids before curing at room temperature and high-strength after curing. It is a solid; it is made of thermosetting resin, curing agent and accelerator with a mass ratio of 100:(50-100):(0-10). The present invention forms a self-welded fiber skeleton structure in the rubber matrix by adding thermosetting solder, which supports the rubber matrix, greatly improves the compression resistance of the rubber matrix, and is beneficial to broaden the rubber under pressure-resistant conditions. application.

The invention discloses a preparation method of a polyaspartic acid complex, wherein the preparation method includes the steps: dissolving sodium hyaluronate in water, adjusting the pH value of the system to 5.8-6.4, adding carbodiimide and N-hydroxy succinimide successively in a stirring state, adding L-cysteine ethyl ester hydrochloride, and stirring to obtain a prefabricated material; and mixing polysuccinimide and a sodium hydroxide solution, adjusting the temperature, stirring, adjusting the pH value of the system to 4.8-5.5, adding the prefabricated material and phenylacrylamide, stirring, adding ethylene glycol diglycidyl ether, carrying out a reaction, precipitating with methanol, purifying, and carrying out vacuum drying to obtain the polyaspartic acid complex. The invention alsodiscloses the polyaspartic acid complex which is prepared by the preparation method of the polyaspartic acid complex. The invention also discloses an application of the polyaspartic acid complex. Thepolyaspartic acid complex has the advantages of excellent water absorption and release performance, high compressive strength, excellent thermal stability, remarkable prolonging of water retention time, and good soil improvement effect.

The invention discloses a high-quality foam fracturing fluid and a preparation method and application thereof, and the high-quality foam fracturing fluid is prepared from the following raw material components in parts by mass: 0.217 to 1.694 parts of a stabilizer, 0.394 to 3.388 parts of a compounding agent, 1.183 to 6.776 parts of a foaming agent, 0.986 to 6.098 parts of a foam stabilizer and 98.6 to 169.4 parts of water, the high-quality foam fracturing fluid with the density of 0.683 g / cm < 3 >-0.879 g / cm < 3 > can be prepared by mixing and stirring the raw material components. The high-quality foam fracturing fluid overcomes the defects that an existing low-density foam fracturing fluid is short in foam stabilizing time, low in foaming rate, uneven in foaming size, not resistant to high temperature and the like, the preparation process is simple, construction is easy, and the high-quality foam fracturing fluid is suitable for yield increasing transformation of low-pressure low-permeability, leakage and water-sensitive stratums.

The invention discloses a flame-retardant insulation board which comprises a base layer, a frame layer, an adhesive layer, a waterproof layer, an insulation layer, an elastic buffer layer and an abrasion-resistant coating. The base layer is covered by the frame layer. The frame layer is composed of a plurality of workpieces which are arranged in parallel or in a staggered mode and form filling cavities. The filling cavities are filled with filler. The frame layer is covered by the adhesive layer. The adhesive layer is covered by the waterproof layer. The waterproof layer is covered by the insulation layer. The insulation layer is covered by the elastic buffer layer. The upper surface of the elastic buffer layer is coated with the abrasion-resistant coating made of abrasion-resistant paint.

The invention discloses an EVA coarse-pore composite foaming material and a preparation method thereof, which is prepared by mixing, granulating and foaming the material; the material includes: 40-60 parts by mass of ethylene-vinyl acetate copolymer, graphene Modified isotactic polybutene 10-20 mass parts, polyolefin thermoplastic elastomer 10-15 mass parts, polyester elastomer 10-20 mass parts, active agent 0.4-0.8 mass parts, crosslinking agent 0.7-1.5 mass parts 2.5-3.5 parts by mass of foaming agent and 0.1-0.3 parts by mass of auxiliary agent; the mass content of vinyl acetate in ethylene-vinyl acetate copolymer is 26%-40%; the preparation method of the EVA coarse-cell composite foaming material , take quantitative isotactic polybutene-1 and melt, add mass content and be 0.05%-0.2% graphene when the melting temperature of isotactic polybutene-1 is 140-170 ℃, so that both mixing Obtain graphene-modified isotactic polybutene afterward; The foaming effect of its coarse-cell foaming of this EVA coarse-cell composite foaming material is good, and has improved compression-resistant performance and resilience performance, and softness and abrasion-resistance are also improved. improved. The preparation method is simple and easy to operate.

The invention provides an oil gas torsion spring, and belongs to the field of springs. The oil gas torsion spring comprises a cylinder barrel, a torsion shaft, floating pistons and an end cover. A closed annular cavity is formed between the inner wall of the cylinder barrel and the outer wall of the torsion shaft. The annular cavity is divided by the first floating piston and the second floating piston into a gas chamber and an oil chamber, a fixed baffle fixedly connected to the inner wall of the cylinder barrel divides the gas chamber into a first gas chamber body and a second gas chamber body which are symmetric, a swinging arm fixedly connected to the torsion shaft divides the oil chamber into a first oil chamber body and a second oil chamber body which are symmetric, the oil chamber bodies are connected through damping holes, and hydraulic oil is led into the oil chamber. Inert gases are led into the gas chamber, and the end cover penetrates the torsion shaft to be fixedly connected with the cylinder barrel through a bolt. According to the oil gas torsion spring, the torsion rigidity and damping coefficient can be automatically adjusted, and accordingly, torsion vibration and torque can be effectively buffered and attenuated; and meanwhile, various sealing systems are internally coated with sealing layers, mutual oil and gas channeling can be effectively prevented, and therefore the oil gas torsion spring is efficient and universal.