33results about How to "Solve the lack of mechanical properties" patented technology

In a rope of a lifting device, particularly of a passenger transport elevator and/or freight transport elevator, the width of which rope is greater than the thickness in the transverse direction of the rope, which rope includes a load-bearing part in the longitudinal direction of the rope, which load-bearing part includes carbon-fiber reinforced, aramid-fiber reinforced and/or glass-fiber reinforced composite material in a polymer matrix, and which rope includes one or more optical fibers and/or fiber bundles in connection with the load-bearing part and the optical fiber and/or fiber bundle is laminated inside the load-bearing part and/or the optical fiber and/or fiber bundle is glued onto the surface of the load-bearing part and/or and that the optical fiber and/or fiber bundle is embedded or glued into the polymer envelope surrounding the load-bearing part, as well as to a condition monitoring method for the rope of a lifting device.

The invention provides a preparation method for a polyimide nanofiber membrane with a cross-linked structure and application of the polyimide nanofiber membrane in a lithium battery diaphragm, belonging to the field of high polymer materials. The preparation method comprises the following steps: subjecting a polyamide acid solution to electrostatic spinning to prepare a polyamide acid nanofiber membrane; etching the polyamide acid nanofiber membrane in an aqueous ammonia solution with a pH value of 8 to 10 for 60 s to form the cross-linked structure; and carrying out washing, drying and imidization at a temperature of 300 DEG C so as to prepare the polyimide nanofiber membrane. The lithium ion battery diaphragm provided by the invention has high mechanical properties, heat stability, high porosity and excellent electrochemical performance. The battery diaphragm has the cross-linked structure and high mechanical properties, thereby overcoming the problems of low strength and an over-open pore structure of a nonwoven polyimide nanofiber membrane. Meanwhile, the diaphragm has porosity of about 80% and can resist a high temperature of 300 DEG C without any deformation, thereby overcoming the disadvantages of low porosity and poor temperature resistance of a polyolefin microporous diaphragm. In particular, the diaphragm provided in the invention has specific capacity substantially better than that of the traditional polyolefin microporous diaphragm under the conditions of high-rate rapid charging and discharging.

A gripper mechanism for a downhole tool is disclosed that includes an eccentric linkage mechanism. In operation, an axial force generated by a power section of the gripper expands the linkage mechanism, which applies a radial force to the interior surface of a wellbore or passage. A sliding portion allows the gripper to slide along a surface of the formation in response to the radial force applied to the interior surface of the wellbore or passage.

The present invention relates to a composition coextrudable with PVDF and comprising: 30 to 50 parts of PVDF; 70 to 50 parts of a copolymer comprising, by weight, 90 to 50% of methyl methacrylate (MMA) per 10 to 50% of an alkyl (meth)acrylate respectively, the alkyl having from 2 to 24 carbon atoms; 1 to 4 parts of a UV absorber; the total making 100 parts. The invention also relates to coextruded films consisting of this composition as the adhesive layer and a PVDF-based layer of 50 to 100 parts of PVDF per 50 to 0 parts of PMMA respectively. These films possess mechanical properties sufficient to allow them to be used as a coating transparent to visible light but opaque to UV radiation.

To provide a non-crosslinked flame-retardant resin composition possessing sufficient flame retardancy, mechanical properties, flexibility and workability, and also delivering excellent heat resistance over a long period of time as it is hard to be molten when used under high temperature environment and its material is not deteriorated even if used in contact with a vinyl chloride resin material and the like, and an insulated wire and a wiring harness using the same. The composition includes (A) a non-crosslinked base resin which contains a propylene resin containing 50 wt % or more of propylene monomer and a thermoplastic resin of which a melting point is 180° C. or more, (B) a metallic hydrate, (C) a hindered phenolic antioxidant, (D) a sulfurous antioxidant, and (E) a metallic oxide. Polymethylpentene, an imidazole compound and an oxide of zinc are preferably utilized as the thermoplastic resin, the ingredients (D) and (E), respectively. The composition is used as an insulated covering material for a non-halogenous insulated wire, which is used in a wire bundle of the wiring harness.

A flexible microporous polymer sheet having first and second opposite major surfaces comprises a polymer matrix binding a filler component that exhibits high oil absorption capacity in its initial state before the start of material processing. The polymer matrix includes a polyolefin component and has three-dimensional interconnecting and interpenetrating pore and polymer networks through which the bound filler component is distributed from the first major surface to the second major surface. The polyolefin and filler components are included in amounts that result in a microporous polymer sheet having between about 75% and about 90% porosity and containing less than about 10 wt. % polyolefin component. Preferred polyolefin and filler components include ultrahigh molecular weight polyethylene and high oil absorption precipitated silica, respectively.

This invention is a preparation method of starch-g-PVA amylopectin starch slurry which could increase starch film's mechanic properties. It belongs to converted starch slurry technology used in weaving and warp sizing. We adopt graft copolymerization and the following hydrolytic reaction to add polyvinyl alcohol grafting branch chain onto starch macromolecules. Then we get starch-g-PVA amylopectin starch slurry constitutes. Mix the starch with PVA in certain proportion. This invention is advantageous in solving layers problem of slurry mixture, irregular dressing and starch lump blemishes. It also increases the mechanic properties of the mixed starch and PVA, increase weaving efficiency and reduce weaving end breakage rate.

A process for depositing porous silicon oxide-based films using a sol-gel approach utilizing a precursor solution formulation which includes a purified nonionic surfactant and an additive among other components, where the additive is either an ionic additive or an amine additive which forms an ionic ammonium type salt in the acidic precursor solution. Using this precursor solution formulation enables formation of a film having a dielectric constant less than 2.5, appropriate mechanical properties, and minimal levels of alkali metal impurities. In one embodiment, this is achieved by purifying the surfactant and adding ionic or amine additives such as tetraalkylammonium salts and amines to the stock precursor solution.

The invention discloses a method for preparing a titanium material through powder metallurgy with a modifier, relates to a method for preparing the titanium material through powder metallurgy and aimsto solve the problems that a titanium material prepared by using a conventional powder metallurgy material is large in texture and degraded in plasticity as textures cannot be controlled. The methodcomprises the following steps: I, performing mechanical powder stirring and mixing, namely mechanically mixing modifier powder, pure titanium and titanium alloy powder by using a stirring and mixing machine so as to obtain composite powder; II, performing sintering, namely sintering the composite powder in a vacuumed sealed container, and naturally cooling to a room temperature, thereby obtaininga modified powder metallurgy titanium material with controllable textures.

The present invention relates to the preparation of Multimetallic Anionic Clays (MACs) through a simple method, which are then shaped by spray-drying into microspheres with adequate mechanical properties, suitable to be fluidized. The microspheres are appropriate for application as additives in the Fluid Catalytic Cracking (FCC) process, i.e. blended with the conventional catalyst, to in situ remove sulfur oxides (SO_x) from the combustion gases produced in the regeneration stage of the FCC process, when cracking sulfur-containing hydrocarbon feeds. An oxidation promoter is added to the MACs in order to promote the oxidation of SO₂ to SO₃, a key step in SO_x removal, providing more efficient and versatile materials, which are apt to be used in atmospheres with variable oxygen concentration.

A gasket for a manifold seal for a fuel cell system includes a first layer of fibrous ceramic material having a first compressibility, a second layer of fibrous ceramic material having a second compressibility and a third layer of fibrous ceramic material having third compressibility. The third layer of fibrous ceramic material is positioned between and engaged with the first layer of fibrous ceramic material and the second layer of fibrous ceramic material. The third compressibility is less than the first compressibility and less than the second compressibility.

A thermal insulation material comprises an intimate mixture of: 60-90% by dry weight expanded vermiculite; 6.5-20% by dry weight inorganic binder; 1-14.5% by dry weight microporous material; 0.1-3.5% by dry weight reinforcing fibres; and 0.5-10% by dry weight infrared opacifier.

The invention belongs to the field of metal alloy materials, and relates to a CoCrNiCuFeMnAl high-entropy alloy. The CoCrNiCuFeMnAl high-entropy alloy comprises the following components of, in percentage by weight, 5.2-38.03 wt.% of cobalt powder, 4.5-34.53 wt.% of chromium powder, 5.17-37.92 wt.% of nickel powder, 5.68-40.25 wt.% of copper powder, 0.2-20.61 wt.% of iron powder, 0.5-33.45 wt.% ofmanganese powder and 0.3-20.03wt.% of aluminum powder. The preparation method comprises the steps that firstly, the metal simple substance powder is subjected to mechanical alloying in a ball mill, then the obtained high-entropy alloy powder is subjected to prepressing forming and annealing treatment and then subjected to hot pressing sintering, a sintered body is subjected to annealing treatment,finally the surface of the annealed sintered body is ground and polished, residual external impurities in the sample sintering process and burrs generated on the edge in the sintering process are removed, so that the CoCrNiCuFeMnAl high-entropy alloy block material is prepared. Compared with a traditional alloy, the high-entropy alloy has better density, hardness and compressive strength.

The invention discloses a novel belt-loop magnesium plate with high strength and corrosion resistance. The surface of the novel belt-loop magnesium plate is covered with a nanocrystal layer, the surface of the nanocrystal layer is covered with a ceramic membrane through a micro-arc oxidation technology, the novel belt-loop magnesium plate is provided with a pull rope hole and a graft hole, the pull rope hole and the graft hole both penetrate through the novel belt-loop magnesium plate, the pull rope hole is used for a pull rope to pass through, and the graft hole is used for a graft to pass through. As the main material of the novel belt-loop magnesium plate is magnesium, magnesium ions of the novel belt-loop magnesium plate can play a role in promoting osteogenesis, so that the formation of callus at the thighbone part is accelerated, the micromotion of a tendon graft in a bone tunnel is slowed down, the widening of the bone tunnel is inhibited, and the reconstruction success rate is improved; and the problems of insufficient mechanical property and poor corrosion resistance of magnesium metal can be solved through the nanocrystal layer and the ceramic membrane, so that the problems of unstable fixation and bone tunnel expansion of an existing tendon graft are practically solved.

The invention discloses a method for improving the strength of a fused salt phase-change heat storage material by utilizing phenolic resin, and belongs to the field of phase change heat storage materials. Based on a preparation method of the stable molten salt phase-change material, a ceramic material is used as a matrix, phenolic resin is used as a binder, a stable structure is provided through the ceramic matrix, the phenolic resin provides formability, and the molten salt phase-change heat storage body with excellent mechanical properties can be prepared by adding a carbon structure generated after the high-temperature part of the phenolic resin is cracked. The preparation method disclosed by the invention is simple, low in cost and capable of realizing large-scale production, solves the common problem of insufficient mechanical properties of the fused salt phase-change heat storage body at present, and has important significance for expanding the application range of the fused saltphase-change heat storage material.

A one-component thermosetting epoxy resin includes compositions that are particularly suitable for the bonding of substrates having different coefficients of thermal expansion, especially in the shell construction of modes of transport or white goods. The one-component thermosetting epoxy resin composition includes a) at least one epoxy resin A having an average of more than one epoxy group per molecule; b) at least one 2,4-diamino-1,3,5-triazine GU containing, in the 6 position, —an alkyl radical having 1 to 20 carbon atoms, in which one hydrogen atom in the α position has been replaced by a 2,4-diamino-1,3,5-triazin-6-yl radical, a cycloalkyl radical having 5 to 12 carbon atoms or -an aryl radical having 6 to 12 carbon atoms; and c) at least one toughness improver D, which is a terminally blocked polyurethane polymer D1.

Silicone surface-treated magnesium hydroxide which is surface treated by a silicone oil, the silicone oil comprising: a polyorganosiloxane containing a plurality of first siloxane units each of which contains hydrogen atom bonded silicon atom. The first siloxane units shares 50 mol % or less of total siloxane units in one molecule in average. Accordingly, sufficient fire retardancy and mechanical properties such as sufficient elongation are achieved.

The invention discloses an integral forming process of a foamed aluminum and fiber reinforced resin-based composite sandwich panel, which comprises the following steps: step 100, carrying out chemical coating treatment on the surface of a foamed aluminum plate to obtain a primarily treated foamed aluminum plate; 200, performing pore filling treatment on the surface of the foamed aluminum plate subjected to primary treatment by using a dielectric material to obtain a foamed aluminum plate subjected to secondary treatment; 300, laying two fiber-reinforced resin-based composite boards symmetrically on the two sides of a mold, and placing the foamed aluminum board subjected to secondary treatment between the two fiber-reinforced resin-based composite boards; and 400, heating the sandwich type pressing equipment to the preset temperature, and enabling a combined structure formed by the two fiber-reinforced resin-based composite boards and the foamed aluminum board subjected to secondary treatment to be pressed and formed under the preset pressure through the sandwich type pressing equipment. According to the invention, the coupling property between the foamed aluminum sandwich layer and the composite material laminated plate is improved.

The invention discloses a 3D printing method for a magnesium alloy-polymer composite biodegradable biological scaffold. The method comprises the following steps: making a biodegradable magnesium alloymaterial into biodegradable magnesium alloy fibers of different mechanical properties and different diameters, and enabling the biodegradable magnesium alloy fibers to penetrate through a nozzle of acoaxial 3D printing head; adding a biodegradable polymer material into a hot-melt chamber on the inner side of the coaxial 3D printing head, and totally extruding the biodegradable magnesium alloy fibers and the molten biodegradable polymer from the nozzle after the biodegradable polymer is molten, so as to form biodegradable magnesium alloy-polymer composite reinforcing fibers; finally, performing 3D printing under control of a 3D printing system according to a scaffold structure in individualized design, thereby obtaining the magnesium alloy-polymer composite reinforced biodegradable biological scaffold. According to the method disclosed by the invention, by virtue of a manner of compounding the polymer on an outer surface of biodegradable magnesium alloy fibers at a low temperature, the mechanical and structural properties of the printed biodegradable biological scaffold are enhanced, and the degradation time of the magnesium alloy is effectively controlled.

The invention discloses aphosphaphenanthrene-containing isobornyl acrylamide oxide, and a preparation method and application thereof. The structural formula of thephosphaphenanthrene-containing isobornyl acrylamide oxide is shown in the specification, the phosphaphenanthrene-containing isobornyl acrylamide oxide has excellent flame-retardant enhancement performance. N-isobornyl acrylamide reacts with 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide to obtain the phosphaphenanthrene-containing isobornyl acrylamide oxide, then the phosphaphenanthrene-containing isobornyl acrylamide oxide is blended with polyhydric alcohol, and is dissolved in the polyhydric alcohol, and then the polyhydric alcohol reacts with isocyanate to prepare rigid polyurethane foam with good flame retardant property and excellent mechanical property.

A method of forming an implantable biomaterial comprising the steps of providing a polyether-diisocyanate prepolymer, reacting the prepolymer with one or more chain extender molecules typically including benzene 1,4-diol to form a mouldable polymer selected from a polyurethane or polyurethane-urea polymer or a polyurethane-urea block copolymer; placing the mouldable polymer into an implantable biomaterial shaped mould, and shaping and curing the mouldable polymer in the implantable biomaterial shaped mould to form the implantable biomaterial. An implantable biomaterial such as a heart valve leaflet is also disclosed.