42results about How to "High tensile and flexural strength" patented technology

A polymer blend, a process for the preparation thereof and products manufactured from the polymer blend. The polymer blend contains 95 to 50 parts by weight of a polyolefin- or polyester-based polymer matrix, 5 to 50 parts by weight of an aromatic main-chain liquid crystalline polymer and plastic additives, if any. Further, the blend contains, based on the total weight of the previous components, 0.1 to 30 percent by weight of a substance (a compatibilizer) which improves the compatibility of the polymer matrix and the liquid crystalline component. The compatibilizer includes a polymer containing reactive functional groups. Preferably, the compatibilizer includes an SEBS polymer functionalized with maleic anhydride or an olefin polymer functionalized with glycidyl methacrylate.

The invention belongs to the technical field of underground engineering materials and particularly relates to concrete for high-ground stress and high-ground temperature tunnel excavation primary support. 1m<3> of concrete comprises the following raw materials in mass: 350 to 400kg of cement, 850 to 1,000kg of coarse aggregate, 450 to 550kg of sand, 200 to 220kg of water, 50 to 100kg of II-grade fly ash, 20 to 40kg of basalt fiber, 10 to 15kg of redispersible latex powder, 6 to 8kg of steel-imitating fiber, 2 to 3 kg of high-performance poly-carboxylic acid water reducing agent and 10 to 15kg of accelerated agent. The concrete has heat tolerance and the function of preventing the brittle failure, such as rock burst; comprehensive problems of rock burst and terrestrial heat damage can be solved; the concrete is easy to stir and mix and good in construction performance; after being ejected onto a wall rock, the concrete can be quickly felted with the wall rock; under the action of the accelerated agent, the concrete is hardened with relatively short time. After the concrete is hardened, the concrete is good in heat tolerance, high in compression strength, high in tensile strength, high in bending strength, good in toughness and good in crack resistance.

A preparation method of a floor plate comprises three steps of manufacturing a three-dimensional trussed type steel bar net rack, preparing concrete materials and manufacturing the floor plate. The three-dimensional trussed type zinc-coated steel wire net rack is connected with high performance concrete in a solidification mode, so that the floor plate has high bearing capacity and high durability, and is simple and easy to install, fast in construction speed, reductive in pollution on site, and saving in a great amount of steel, concrete and wood and expenses of labors, water and electricity. The floor plate can be standardized in a factory and manufactured in a scale mode, and is an innovation-type assembly type strong intensity floor plate.

The invention provides an energy-saving environment-friendly wall body material and a preparation method thereof, and relates to the field of building materials. The energy-saving environment-friendly wall body material is prepared from the following raw materials in parts by weight: 15 to 19 parts of fine sand, 30 to 40 parts of crushed stone, 18 to 30 parts of cement, 10 to 15 parts of waste polyurethane foam plastic, 9 to 17 parts of waste extruded sheet, 15 to 20 parts of bamboo charcoal, 5 to 9 parts of ceramic fiber, 8 to 14 parts of polyamide fiber, 3 to 5 parts of attapulgite, 12 to 16 parts of phenolic foam, 11 to 17 parts of vermiculite, 0.2 to 0.4 part of bonding agent, 0.7 to 1.1 parts of thermal stabilizer, 0.3 to 0.5 part of air entraining agent, 0.2 to 0.6 part of retarder, 0.3 to 0.7 part of water reducing agent, and 3 to 7 parts of water. The preparation method comprises the following steps: (1) weighting the raw materials; (2) calcining the vermiculite; (3) smashing the mixed materials; (4) preparing a mixture; (5) preparing mixed slurry; (6) casing, demolding and curing. The energy-saving environment-friendly wall body material prepared by the method provided by the invention has the advantages of high compressive strength, high tensile strength, high heat preservation and insulation performance, energy saving and high environmental friendliness.

The invention discloses a double-layered cavity fiber web reinforced grouting full-length reinforced freezing pipe and a construction method thereof. The pipe mainly comprises a main body structure with steel pipes with large and small diameters in sleeve connection to form a cavity of inner and outer walls, a bottom taper angle device connecting the inner and outer steel pipe walls of the main body structure and an inner and outer pipe top port sealing device. The bottom taper angle device is also of a double-layered cavity structure communicated with the cavity of the main body structure, and the bottom taper angle device is internally provided with a one-way backstop pressure valve communicated with the inside of the freezing pipe and the cavity. According to the design, by means of matched operation of a liquid feeding pipe and the one-way backstop pressure valve, cement slurry is injected into the cavity of the main body structure, and a pre-placed fiber web is placed to form fiber web reinforced concrete. The stiffness, the strength and the corrosion resistance of the freezing pipe are greatly improved. The freezing pipe is suitable for the stratum freezing method construction project subjected to complex high stress and aqueous corrosion, effectively reduces the accident probability of freezing wall melting due to salt leakage caused by damage and fracture caused by thecorrosion and the high stress, and avoids inducing flooding accidents.

The invention provides an energy-saving and environment-friendly building decoration material and a preparation method thereof and relates to the field of building materials. The energy-saving and environment-friendly building decoration material comprises waste plastic, slag powder, stone powder, polyvinyl chloride resin, glass fibers, bamboo fibers, nanometer silicon carbide, zirconium oxide, ceramic fibers, graphite, airgel, water glass, diatomite, attapulgite, activated carbon powder, a flame retardant and a compatibilizer according to a weight part ratio. The preparation method comprises (1) raw material weighing, (2) plastic granule preparation, (3) stirring and (4) heating and extrusion forming. The building decoration material has the advantages of good fire resistance, good energy saving and environmental protection effect and low cost.

The invention discloses a novel anti-pullout pedicle screw based on the additive manufacturing technology, which is high in strength and capable of promoting osseointegration. The pedicle screw is composed of a solid nail lower end with a thread, a nail upper end with a peripheral tensile expansion structure and an internal solid cylinder, and a nail base connected with the peripheral tensile expansion structure, as is shown in Figure 1. With the tensile expansion performance of the tensile expansion structure, the pedicle screw expands when tensioned, and thus the stability of the pedicle screw and the vertebral body is improved; meanwhile, the tensile expansion structure part is of a porous structure, and osteocytes can grow into the porous structure easily to promote osseointegration and accelerate integration of the pedicle screw and the vertebral body; besides, unique structural design is adopted to overcome the defect of low strength of the tensile expansion structure, so that the mechanical strength of the pedicle screw is ensured and the internal fixation effect is improved while the anti-pullout performance of the pedicle screw is achieved. The pedicle screw can be easilyapplied to design of orthopedic medical instruments.

The invention provides an energy-saving and environment-friendly building material and a preparation method thereof and relates to the field of building materials. The energy-saving and environment-friendly building material contains the following raw materials in parts by weight: 5-9 parts of nano titanium dioxide, 7-11 parts of asphalt, 11-15 parts of bauxite, 8-10 parts of tricalcium silicate, 4-8 parts of polypropylene resin, 13-21 parts of flue dust, 12-18 parts of zirconium phosphate silver-loaded powder, 13-17 parts of waste glass, 5-9 parts of waste polyethylene foam plastic, 9-13 parts of ceramic fiber, 7-11 parts of polyarmide fiber, 13-17 parts of active carbon, 13-23 parts of attapulgite, 11-21 parts of diatomite, 2-4 parts of adhesive, 0.5-0.9 part of retarder, 0.1-0.5 parts of antioxidant, 0.3-0.9 part of heat stabilizer, 0.2-0.4 part of water reducing agent and 5-7 parts of water. The preparation method comprises the following steps: (1) weighing the materials; (2) heating; (3) crushing; (4) stirring; (5) pressurizing and forming; and (6) drying. The energy-saving and environment-friendly building material and the preparation method provided by the invention have the advantage that the problem that the existing building materials have shortages when being applied to buildings with higher requirements for environmental protection, compression resistance, bending resistance and tensile strength is solved.

The invention discloses a reinforced aluminum alloy automobile door hinge. The reinforced aluminum alloy automobile door hinge comprises an automobile body part and an automobile door part, wherein the automobile body part comprises a fixed structure, a guide structure and a connecting shaft structure; and the automobile door part comprises a fixed small structure, a reinforced structure and a connecting shaft large structure. The reinforced aluminum alloy automobile door hinge disclosed by the invention has a relatively reasonable structure and relatively high stress intensity, and has the advantages of abrasion resistance, durability, easiness in recovery of deformation, convenience for installation and detachment, and easiness in popularization and application.

A sprayable skin composition and method of applying the skin composition is provided for use in reinforcing plastic products. The skin composition comprises a mixture of reinforcing wollastonite fibers and a synthetic resin, along with additional additives such as thixotropic agents, accelerators, stabilizers, and an air release agent. The composition is applied by spraying onto a gel coat in a mold and forms a gel within 1 to 3 minutes without the formation of air bubbles.

The invention provides a molding producible by a process comprising the following steps:

• • a) introduction of a foamable reactive resin into a support material and
  • b) compressive deformation of the support material comprising the foamable reactive resin.

The invention discloses a high-strength plastic-wood handrail. The high-strength plastic-wood handrail comprises a plurality of vertical columns arranged in the lateral direction, and at least one cross bar is fixedly connected between every two vertical columns. Each vertical column comprises a cover body, an outer tube and an inner tube arranged in the outer tube, and the inner tube and the outer tube are coaxially arranged. Multiple ribs parallel to the axis of the inner tube are arranged between the outer wall of the inner tube and the inner wall of the outer tube in the circumferential direction of the inner tube. The cross section of the outer tube is rectangular, the cross section of the inner tube is polygonal, and a central circular hole coaxially arranged with the inner tube is arranged in the inner tube. An interlayer is arranged in the outer tube, steel wire gauzes are arranged on two sides of the interlayer, and a fireproof asbestos cloth is arranged in the middle of the interlayer. The cover body is provided with a groove which is recessed inward and the groove fits with the outer wall of the outer tube. A protruding column coaxially arranged with the groove is arranged in the central position in the groove, and the protruding column is slidably connected to the central circular hole in an inserting mode. The outdoor plastic-wood column has the advantages of highstrength, less material consumption and fire prevention.

Current stripped hole repair devices operate by expanding to exert pressure against the inside of a hole into which the device is placed, and are by design suitable only for repairing a stripped or damaged hole in alignment with the original hole. Likewise, various methods exist that do not result in a smooth surface into which a new hole can be drilled. In most cases, these methods are non-permanent, temporary, non-weight-bearing devices that inadequately address the problem. The solution provided comprises a solid plastic insert with segments that break off at a desired length, into which a new hole may be drilled and a screw inserted. The method for installing the apparatus utilizes an adhesive that bonds to the medium into which it is installed. The disclosure describes a simplified and practical method to repair a stripped screw hole, and an apparatus that can be manufactured and made commercially available.

The invention discloses a fire-proof high-strength plastic wood stand column. The fire-proof high-strength plastic wood stand column comprises an outer pipe and an inner pipe coaxially arranged in theouter pipe. A plurality of ribs parallel to the axis of an inner pipe are arranged between the outer wall of the inner pipe and the inner wall of an outer pipe in the circumferential direction of theinner pipe. The cross section of the outer pipe is rectangular, the cross section of the inner pipe is polygonal, and a central circular hole which is formed coaxially with the inner pipe is arrangedin the inner pipe. An interlayer is arranged in the outer pipe, steel wire mesh are arranged on both sides of the interlayer, and a fire protection asbestos cloth is arranged in the middle of the outer pipe. The fire-proof high-strength plastic wood stand column has the advantages of high strength, less material consumption and fire protection.

The invention discloses a large compound radiation heating rod and a preparation method thereof. The large-scale composite radiant heating rod and its preparation method include a fixed sleeve made of insulating material, and a plurality of installation column holes are evenly penetrated on the tube wall of the fixed sleeve along the axial direction of the fixed sleeve, and each installation A heating rod is inserted in the column holes, and the outer wall of the fixed sleeve adjacent to each installation column hole is provided with several fixing holes connected with the installation column holes. In the fixing holes and the installation column holes facing the fixing holes Filled with ceramic cement. In the large-scale composite radiant heating rod and its preparation method, a plurality of heating rods welded together are assembled in a fixed sleeve, which increases the radiation area and length of the heating rod to radiate heat into the furnace, and the outer fixed sleeve serves as a protective layer , high tensile and flexural strength, the damage rate of the heating rod is greatly reduced, so that the heating rod can be arranged in the heating furnace arbitrarily, and the heating volume of the electric furnace is increased, which is convenient for processing many large products.