143results about How to "Strong binding strength" patented technology

The invention discloses a method for producing irregular-section composite pipes, belonging to the technical field of metal composite materials. The method comprises the following steps: an irregular-section aluminum pipe is extruded and formed, the surface of the inner hole of the irregular-section aluminum pipe is modified, the external surface of a stainless steel pipe is modified, the surface-modified stainless steel pipe is inserted into the inner-hole-surface-modified irregular-section aluminum pipe, the assembling end parts of the stainless steel pipe and the irregular-section aluminum pipe are sealed after the assembling is completed, and the welded part of the irregular-section aluminum pipe and the stainless steel pipe is put into a hot isostatic pressure furnace for heat treatment to obtain an irregular-section composite pipe. The irregular-section composite pipes produced through the invention have the advantages that the weight is light, the strength is high, the thermal expansion efficiency is high, the interfacial metallurgical bonding ratio is close to 100 percent, the interfacial heat exchange coefficient is high, the bonding strength is high, the service life in severe cold-and-hot-alternation environment and the like, can be used in heat pipe systems which are key technical hardware of aircrafts, aerospacecrafts and other spacecrafts, and can be widely used in fields such as power, electronics, ships, nuclear energy and the like.

The invention provides a super-hybrid composite laminate for neutron shield. The super-hybrid composite laminate comprises a metal plate and a fiber enhanced resin-based composite layer which are alternately laminated, wherein the fiber enhanced resin-based composite layer is prepared from basalt fiber, epoxy resin, modified boron carbide, a curing agent, a moderator and a neutron absorber. The provided fiber enhanced resin-based composite layer has excellent shielding performance and mechanical performance, has the density of 2.36-2.42 g/cm<3>, the tensile strength of 1,120-1,160 MPa, the tensile modulus of 82-85 GPa and the interlaminar shear strength of 78-85 MPa, has the <252>CF neutron source shielding factor Kf (15 mm) of 2.65-3.02 and the neutron shield rate Ath10 (10mm) of 99.88%-99.89%. The invention further provides a preparation method of the composite laminate. The preparation method is simple and convenient to operate and easy to implement.

The invention provides a degradable lightweight polyolefin composite for injection molding and a preparation method of the composite. The polyolefin composite is prepared from secondarily modified fiber mixed filler, polyolefin resin, a toughening agent, a compatilizer, a lubricant and the like through blending and extrusion granulation by a tri-screw extruders which are arranged triangularly and meshed in the same direction, wherein the modified fiber mixed filler is prepared as follows: a natural plant fiber material such as rice husks, chaff and the like are mixed with a nano-silica colloidal solution, a dispersant and a surfactant are added and a blending reaction, drying and other technologies processes are performed; then the modified mixed fiber filler is subjected to secondary surface coupling hydrophobic treatment and blended with polyolefin resin, the toughening agent, the compatilizer and the lubricant. The polyolefin composite has degradability specific to the natural plant fiber filler, has lower density than inorganic mineral filler and has excellent thermoplastic processing characteristics and mechanical properties in the injection molding process.

The invention discloses a polyethylene film for automatic packaging. The polyethylene film comprises an outer layer, an intermediate layer and an inner layer which are sequentially laminated. The outer layer is prepared from the following substances in parts by weight: 20-40 parts of low density polyethylene (LDPE), 30-50 parts of linear low density polyethylene (LLDPE), and 20-40 parts of LLDPE with melt index of 1.1 g/10 min and density of 0.920 g/cm<3>. The intermediate layer is prepared from the following substances in parts by weight: 10-30 parts of LDPE, 30-50 parts of LLDPE with melt index of 1.1 g/10 min and density of 0.920 g/cm<3>, and 30-50 parts of LLDPE with melt index of 2.4 g/10 min and density of 0.921 g/cm<3>. The inner layer is prepared from the following substances in parts by weight: 10-30 parts of LDPE, 30-50 parts of LLDPE, and 10-30 parts of LLDPE. The invention solves the problem that the polyethylene film has lower thermal viscosity and higher bag breaking rate.

The invention relates to an artificial elbow joint prosthesis, in particular to a design method of the artificial elbow joint prosthesis which is provided with a tantalum microporous coating on the surface, the artificial elbow joint prosthesis comprises a humeral component used for being implanted into a marrow cavity of distal humerus, an ulnar component for being implanted into the marrow cavity of proximal ulna and a radial component for being implanted into the marrow cavity of proximal radius, each component consists of a joint part and a handle body part, the joint parts have the rotary motion function with different degrees for ensuring the motion of a joint after implanting the prosthesis, and the handle body parts are the parts for being inserted into the marrow cavity, thereby achieving a role of fixing the prosthesis. The joint parts of the humeral component and the ulnar component are connected by relying on a crankshaft which can rotate for chimerism, and a joint ball head of the radial component is connected by chimeric sleeve joint through a joint mortar groove connected at the proximal end of the ulnar component. The artificial elbow joint prosthesis is characterized in that a tantalum surface is wrapped on the outer surface of each handle body, and each tantalum surface is in the microporous structure, thereby improving the fixing effect of the artificial prosthesis in a human body and prolonging the service life of the artificial prosthesis.

The refractory composite heat insulating sprayed paint suitable for high temperature furnace, kiln and other thermal apparatus is powder comprising base material sepiolite, brucite, blue asbestos, basalt, apyre and quartz and high temperature adhering material. In the construction site, the powder is mixed with water to form heat insulting paint. The heat insulting paint has low heat conducting coefficient, high adhering strength, capacity of being used for both cold and hot construction, low comprehensive cost and other advantages.

The invention relates to a method for manufacturing a shoe composition. The method comprises the following steps: selecting a rubber blank to be formed; coating hot melt adhesives on the blank; cutting the coated blank into a preset shape; putting the cut blank into a mold cavity; closing a mold, heating and pressurizing the mold so as to ripen rubber in the mold; combining the hot melt adhesivesand rubber outsoles after rubber ripening is completed so as to form a footwear outsole with a hot melt adhesive layer by one-step forming; and then, after the temperature of a hot melt adhesive filmis increased by ultraviolet ray or radiofrequency, directly processing the attachment to midsole or a vamp. The method can improve the bonding strength of the hot melt adhesive and the outsole or themidsole, enables the subsequent processing step to be simpler, quicker and easier, and avoids the risk or environmental pollution caused by coating combustible addition agents with volatility.

The invention provides a boron-containing additive for carbon refractory, which is characterized in that the boron-containing ingredients including metal boride, B4C or amorphous boron powder are directly compounded in spongy basal body of Al2O3 or MgO by the in-situ synthesis technology so as to form Al2O3-base or MgO-base boron-containing additive. The product takes loose sponge shape. The invention adopts the boric anhydride and metal oxide, or the boric anhydride and graphite, or the boric anhydride as raw materials, and adopts the aluminum powder or magnesium powder as a reducing agent; the materials and the reducing agent are mixed, activated and are then placed in a self-spreading reacting furnace; the partial ignition mode is adopted to initiate the combustion synthesis reaction so as to produce the Al2O3-base or MgO-base boron-containing additive. The boron-containing additive for carbon refractory has the advantages of simple technique, low production cost and high product purity and does not have secondary pollution caused by crashing in the traditional production technique.

The invention relates to an electrostatic spraying type high abrasion-resistant powder coating and a preparation method thereof. The electrostatic spraying type high abrasion-resistant powder coating is prepared from the following raw materials in parts by weight: 45 to 95 parts of polyurethane, 5 to 25 parts of hydroxy acrylic resin, 1 to 5 parts of epoxy resin, 5 to 15 parts of multiwall carbon nanotube, 2 to 8 parts of titanium dioxide, 1 to 4 parts of aluminum nitride, 5 to 15 parts of mica powder, 5 to 10 parts of talcum powder, 10 to 30 parts of titanium dioxide, 1 to 20 parts of pigment filler, 0.5 to 2 parts of dibutyltin dilaurate, 0.5 to 3 parts of benzoin, 1 to 3 parts of flatting agent, 0.1 to 1 part of anti-precipitating agent, and 2 to 40 parts of curing agent. The electrostatic spraying type high abrasion-resistant powder coating has the advantage that at the premise of ensuring good conductivity of the powder coating, the corrosion-resistant property of the coating is greatly improved.

An environmental-protection type nano-class liquid aluminium foil as a chemicoplating material on the surface of metal is prepared from pure coster oil, TDI, epoxy resin, aluminium powder and nano-class filler through a special process. It has solvent type and water type. Its advantages are low cost, excellent anticorrosion performance, and no environmental pollution.

The invention provides an anodizing electrolyte and a preparation method of a magnesium alloy and resin complex, wherein the anodizing electrolyte is prepared from the following components with mass concentration: an inhibitor of which the mass concentration is 1g/L-20g/L, an oxidizer of which the mass concentration is 5g/L-20g/L, salts of which the mass concentration is 1g/L-50g/L, and alkaline matters of which the mass concentration is 5g/L-10g/L, wherein the salts include at least one of phosphate, molybdate and sulfate; and the alkaline matters include at least one of sodium hydroxide, sodium carbonate, sodium bicarbonate, potassium hydroxide, potassium carbonate, potassium bicarbonate, hydrazine hydrate and ammonia water. Because alkaline liquor is added to the anodizing electrolyte,in the process of anodizing magnesium alloy, a nano-scale porous membrane formed on the surface of the magnesium alloy is more uniform, so that when the magnesium alloy is subjected to subsequent injection molding treatment, resin enters nano-scale pores and troughs during injection molding, and then, the magnesium alloy and the resin part have higher bonding strength.

The invention provides a preparation method of a hard tissue substitute material, which comprises the following steps of: S1, preparation of nano-hydroxyapatite powder; S2, pretreatment of a substrate; S3, preparation of an electrophoretic deposition suspension; S4, electrophoretic deposition treatment. The hard tissue substitute material prepared by the method of the invention has good interface bonding strength; no later crystallization heat treatment is necessary; and thus phase transition and decomposition of a bio-coating during high temperature heat treatment are prevented. The method of the invention is simple and practical in operation, and the obtained coating is low in product cost.

The invention belongs to the field of cellulose diacetate products, and particularly relates to a modified cellulose diacetate product as well as a preparation method and application thereof to 3D printing and other fields. The modified cellulose diacetate provided by the invention is prepared by mixing cellulose diacetate, a plasticizer, a hindered phenol antioxidant, a phosphite antioxidant andperoxide. The cellulose diacetate can be used as a 3D printing material for preparing products by adopting a 3D printing method.

The present invention relates to a complex of a protein comprising zinc oxide-binding peptides and zinc oxide nanoparticles, to the use thereof as a drug delivery carrier for manufacturing medicines, and to a vaccine composition and a contrast agent comprising the composite. The protein comprising zinc oxide-binding peptides significantly improves the in vivo availability of zinc oxide-binding peptides, and therefore the complex of the present invention can be used not only as a drug delivery carrier for in vivo drug delivery or intracellular drug delivery, but also for in vivo imaging or cell imaging. The complex can be used for producing separating agents for effectively separating biological materials, therapeutic agents for hyperthermia, etc., contrast agents for MRI, and beads applicable to biosensors.