44results about How to "Excellent mechanical properties" patented technology

The utility model discloses a novel armored cable, and belongs to the technical field of armored cables. Comprising a plurality of semi-conductive conductor shielding sleeves, a plurality of conductor cores are arranged in the semi-conductive conductor shielding sleeves, the peripheries of the semi-conductive conductor shielding sleeves are fixedly sleeved with an electromagnetic shielding sleeve, the outer wall of the electromagnetic shielding sleeve is sleeved with a fireproof layer, the outer wall of the fireproof layer is sleeved with a non-metal armor layer, and the outer wall of the non-metal armor layer is sleeved with a fireproof layer. A plurality of supporting strips are arranged in the non-metal armor layer and are annularly and uniformly distributed, and the supporting strips in the non-metal armor layer are made of carbon fiber reinforced plastic materials, so that the non-metal composite materials have excellent mechanical strength and light weight characteristics, the mechanical protection performance of the cable can be ensured, and the service life of the cable is prolonged. The weight of the cable is remarkably reduced, laying and installation are facilitated, the elastic bands are installed between the adjacent supporting strips, the multiple supporting strips can be evenly distributed on the outer wall of the fireproof layer through installation of the elastic bands, and meanwhile the multiple supporting strips can be conveniently fixed.

The invention provides 3D printing plant-based protein double gel with intelligent responsiveness and a preparation method thereof.The protein double gel comprises a water-soluble gel composition and an oil-soluble gel composition, the water-soluble gel composition comprises plant protein, water, water-soluble nutrients and a water-soluble indicator, and the oil-soluble gel composition comprises an oil-soluble nutrient and an oil-soluble indicator; the oil-soluble gel composition includes an oil gel, a vegetable oil, a fat-soluble nutrient, and a fat-soluble indicator. According to the 3D printing plant-based protein double-gel with the intelligent responsiveness, a stable protein double-gel system is constructed through the interaction between the oil gel and the hydrogel, good mechanical stability is achieved, various nutrient elements are enriched in the same product, the nutritional value of the product is increased, and the 3D printing plant-based protein double-gel with the intelligent responsiveness has a good application prospect. The protein double gel also has good 3D printing adaptability and sensitive external environment stimulation responsiveness, changes of nutrients of the product in different processing and preservation processes are fed back by using sensory characteristics of the product, and visual monitoring of the nutritional value of the product is realized.

The present application relates to the technical field of bamboo fiber composite material, in particular to a purification preparation method of bamboo fiber reinforced natural polymer composite material. The bamboo raw material is crushed and treated by steam explosion to obtain primary bamboo fiber; the primary bamboo fiber is sequentially subjected to organic solvent dewaxing treatment and oxidation system selective delignification treatment to obtain purified bamboo fiber; the purified bamboo fiber is treated in a tannin acid solution to form a polyphenol interface layer on the surface thereof; and a solution containing polyvalent metal ions is added to the treated bamboo fiber to form a coordination cross-linking interface layer on the surface of the bamboo fiber. The present application constructs a stable interface layer between the fiber and the natural polymer matrix. The interface layer can effectively transfer stress, significantly improve the tensile strength, bending strength and shear strength of the composite material, and solve the problem of weak interface and easy delamination of traditional natural composite materials.

A method for preparing a high-temperature ablation-resistant chopped carbon fiber reinforced SiBCN‑MAS composite material, which relates to a method for preparing a SiBCN ceramic-based composite material. The present invention aims to solve the problem that the existing carbon fiber or cracked carbon coated carbon fiber reinforced SiBCN ceramic-based composite materials have poor contact surface bonding and limited improvement in high-temperature ablation resistance. Method: 1. Prepare cracked carbon coated chopped carbon fibers; 2. Prepare SiBCN amorphous ceramic powder; 3. Mix raw materials; 4. Sinter. The present invention is used for the preparation of high-temperature ablation-resistant chopped carbon fiber reinforced SiBCN‑MAS composite materials.

A polyimide resin powder is provided, which is a polyimide resin powder containing a tetracarboxylic acid component and a diamine component. The tetracarboxylic acid component includes 3,3',4,4'-biphenyltetracarboxylic acid dianhydride and 2,3,3',4'-biphenyltetracarboxylic acid dianhydride. The diamine component includes p-phenylenediamine, m-phenylenediamine and / or 4,4'-diaminodiphenyl ether. Based on the total molar amount of the diamine component, the content of p-phenylenediamine is 70 mol% to 98 mol%, and based on the total molar amount of the diamine component, the combined content of m-phenylenediamine and 4,4'-diaminodiphenyl ether is 2 mol% to 30 mol%.

The application discloses a high-flash-point alkyd protective paint and a preparation method thereof. The paint is a single-component product and specifically comprises high-flash-point alkyd resin, mixed alkane / aromatic hydrocarbon solvent oil, pigment, filler, bentonite, dispersant, drier, anti-skinning agent and the like. The paint has the advantages of high flash point (67-70 DEG C), fast drying, anti-yellowing, impact resistance, salt water resistance, excellent adhesion, high solid content, low VOC content and the like, and can be stored and transported as common goods.

The invention discloses a rodlike carbon nitride-polydimethylsiloxane composite coating and a preparation method and application thereof.The rodlike carbon nitride-polydimethylsiloxane composite coating is prepared by mixing rodlike carbon nitride filler, polydimethylsiloxane and a curing agent, and even doping of the rodlike carbon nitride filler can effectively improve the crosslinking density of the composite coating; the adhesive force and the tensile strength of the coating are enhanced; when the composite coating is applied to the surface of a matrix, a multifunctional nano coating with mechanical reinforcement, long-acting corrosion prevention and microbial antifouling characteristics can be formed, the impedance arc radius is kept at 5.17 * 10 < 9 > omega.cm < 2 > after the composite coating is soaked for 60 days, and the composite coating shows excellent bacteriostasis and sterilization performance on chlorella and escherichia coli; the excellent biological pollution prevention characteristic is shown.

The invention provides a resin composition and a molded article thereof. A resin composition according to the present invention contains a graft copolymer (A) and a thermoplastic resin (B) (excluding the graft copolymer (A) and a polylactic acid polymer (D)). ) and a fatty acid compound (C).

The present application relates to the field of organic solar cells, and provides a kind of full asymmetric small molecule donor SMD-Asy and its preparation method and application.The SMD-Asy is connected by Stille coupling from asymmetrically substituted conjugated BDTT core and acceptor unit, and the side chain and main chain structure are all asymmetrically distributed.The preparation of the small molecule donor includes: constructing thiophene and benzo dithiophene diketone BDTT intermediate, introducing long-chain alkoxy side chain under phase transfer catalysis condition, obtaining tin precursor by low-temperature lithiation, and then coupling with halogenated acceptor unit to obtain target molecule.Due to the simultaneous asymmetric design of main chain-side chain, SMD-Asy can regulate the phase separation scale and chain conformation of blended film as the third component in PM6:Y6 system, thereby improving the hole / electron transport balance and mechanical ductility, so that the device can ensure high photovoltaic performance while improving the cracking strain rate.The small molecule donor of the present application is suitable for flexible and stretchable organic solar devices.

A lignin-modified novolac-type phenol resin having a weight average molecular weight of equal to or more than 5500.

This is to provide a polyamide resin composition that has good mechanical characteristics such as tensile characteristics, bending characteristics and impact resistance, and low water absorption. The polyamide resin composition of the present invention comprises 55 to 78% by mass of an aliphatic polyamide resin (A), 20 to 35% by mass of glass fiber (B), 1 to 9% by mass of a crosslinking agent (C), 0.1 to 1.5% by mass of a heat-resistant agent (D) and 0 to 6% by mass of an inorganic filler other than glass fiber (E) in 100% by mass of the polyamide resin composition, and the aliphatic polyamide resin (A) has an average number of carbon atoms per one amide group of exceeding 6.

It is intended to provide a negative type photosensitive resin composition that ensures high aspect ratio pattern processability, high storage stability, and high curability and also provides a cured product with good mechanical characteristics and high heat resistance. A negative type photosensitive resin composition comprising a polymer compound (A), a cationic polymerizable compound (B), a cationic polymerization initiator (C), and a solvent (D) wherein the component (A) contains at least one compound selected from the group consisting of polyamide, polyimide, polybenzoxazole, precursors thereof, and copolymers thereof and wherein both the relations 0.6A ≤ B + 0.5C ≤ 0.98A and 0.05(B + C) ≤ C ≤ 0.25(B + C) are satisfied where A (moles), B (moles), and C (moles) represent the quantities of all carboxylic acid residues, all diamine residues, and all monoamine residues, respectively, contained in the component (A).

This invention relates to polyimide composite powders containing silane agents and methods for preparing the same. More specifically, the method for preparing the polyimide composite powder includes: step a), preparing polyamic acid by means of dianhydrides and diamines; and step b), imidizing the polyamic acid prepared in step a) by adding a silane agent. This invention uses a silane agent in a specific ratio and employs aqueous polymerization, thereby improving flowability and dispersibility without reducing mechanical properties.

Examples relate to thin films, transparent laminates, applications as cover films, and multilayer electronic devices incorporating the thin film, which possess excellent optical properties such as refractive index, haze, and yellowness, as well as excellent mechanical properties. The thin film includes an elastic layer with a refractive index of 1.48 to 1.58 and a low-temperature damage index (the difference between tensile modulus and tensile strength at a specific temperature), wherein the low-temperature damage index of the elastic layer at -40°C is below 1300 MPa.

The present invention relates to a composite electrolyte and a battery, and the composite electrolyte can include a base layer; and an active layer disposed on one side or both sides of the base layer and containing first inorganic particles and second inorganic particles, wherein the true density of the first inorganic particles can be equal to or less than the true density of the second inorganic particles.

The present invention addresses the problem of providing a polyamide resin capable of producing a film having good mechanical properties while suppressing production costs. The polyamide resin contains a structural unit represented by formula (1) and a structural unit represented by formula (2).

This invention provides a chemically strengthened glass-ceramic and its preparation. The chemically strengthened glass-ceramic includes a glass-ceramic substrate and a compressive stress layer formed on the surface of the substrate through ion exchange chemical strengthening. The glass-ceramic substrate comprises crystal family 1 and crystal family 2. Crystal family 1 includes crystals having the following structural formula: (Zn x Mg 1‑x‑y Al 2‑2y (Al) 2y Mg y O4, wherein: 0≤x≤1; 0≤y≤1; and 0≤x+y≤1; the crystal group 2 includes zirconium oxide; the compressive stress layer has a CTLD_saf value of 15000~70000 MPa. Compared with the existing LAS microcrystalline glass system, the chemically strengthened microcrystalline glass of the present invention not only has excellent mechanical properties and impact resistance, but also significantly reduces the overall cost.

Provided is a stereoscopic molding resin composition containing a multifunctional urethane (meth) acrylate having a molecular weight of 700 or more and 1,300 or less.

This application provides a stator core, stator, motor, powertrain, and vehicle, including: multiple stator laminations; the multiple stator laminations are stacked along the axial direction of the stator core, and each stator lamination includes N layers of first amorphous alloy sheets, where N≥1; wherein, the ratio of the axial dimension of the stator lamination along the stator core to the maximum radial dimension of the stator lamination along the stator core is the stator lamination diameter coefficient, which is 0.19‰~1.68‰. During the stamping process of obtaining stator laminations, by controlling the ratio of the axial dimension of the stator lamination along the stator core to the maximum radial dimension of the stator lamination, i.e., the stator lamination diameter coefficient, within a suitable range, the possibility of edge warping or even breakage of the stator laminations can be reduced, which is beneficial to improving the yield rate of the stator laminations.

Provided is a non-woven fabric having excellent liquid permeability and mechanical properties for a high-viscosity liquid. The non-woven fabric includes thermally adhesive composite fibers in which intersection points are thermally adhered, the specific volume of the non-woven fabric is 60 cm3 / g to 95 cm3 / g, and the fiber density ratio of a high-density region to a low-density region in the non-woven fabric is 1.4 or less. The thermally adhesive composite fibers constituting the non-woven fabric are distributed in a state of low density in the thickness direction of the non-woven fabric, and the fibers form adhesive points at an appropriate density.

The present application relates to the technical field of ore dressing equipment, in particular to a large-scale flip-flop screen with an octagonal tube supporting structure, a supporting beam comprising an octagonal tube and end plates arranged at both ends of the octagonal tube and fixed to the inner side wall of a screen box; a fixed hoop is clamped on the octagonal tube; a supporting strip comprises a strip-shaped plate fixed to the top of the fixed hoop, a sleeve ring fixed to the strip-shaped plate, a vertical rod slidingly sleeved in the sleeve ring, a spherical shell fixed to the top end of the vertical rod, a ball head rotatably sleeved in the spherical shell, and an internally threaded pipe fixed to the top end of the ball head; a lower strip arranged above the strip-shaped plate is provided with perforations three; a plurality of strip-shaped screen meshes are arranged in a horizontal staggered manner, and both sides of the strip-shaped screen mesh are provided with perforations one; a connecting piece is sequentially sleeved with the perforations one, three, and the internally threaded pipe; the top surface of an edge beam fixed to the inner side wall of the screen box and located below the strip-shaped screen mesh is provided with a threaded hole; and the problem that the flexible screen mesh in the large-scale flip-flop screen is inconvenient to assemble and maintain is better solved.

The utility model discloses a booster-level flame-retardant low-intermodulation feeder line, and relates to the technical field of cables. The booster-level flame-retardant low-intermodulation feeder line comprises an inner conductor, an insulating layer, an outer conductor and a sheath which are coaxially arranged from inside to outside, the outer conductor is a spiral corrugated metal tube, the insulating layer is made of low-density polytetrafluoroethylene with a fibrous microporous structure, and the sheath is made of booster-level flame-retardant fluorinated ethylene propylene; the booster-level flame-retardant low-intermodulation feeder line provided by the utility model has the characteristics of high temperature resistance, high flame retardance, high shielding, low loss, low passive intermodulation and super-flexible bending, is suitable for booster-level cables or cable assemblies of a UL system, and is particularly suitable for interlayers of ceilings and high-flame-retardant safe application occasions of super-flexible wiring connection.

This composition for encapsulating an electronic device contains a photopolymerizable monomer and a photopolymerization initiator, and when the photopolymerizable monomer is cured by irradiation with ultraviolet light having a wavelength of 395 nm at 1.5 Jcm-2 in a nitrogen atmosphere, the curing rate of a formed electronic device encapsulating film is 80% or more. And the residue rate of the electronic device sealing film based on a differential thermal-thermogravimetric synchronous measurement device (TG-DTA) is 3% or more.

This fiber-reinforced polyamide resin composition contains a crystalline polyamide (A1) and a glass fiber (B1), and has a formic acid relative viscosity of 90 or more. The fiber-reinforced polyamide resin composition is characterized in that an insoluble component when the fiber-reinforced polyamide resin composition is dissolved in formic acid is 105 mass% or more relative to the ash content of the fiber-reinforced polyamide resin composition, and the ratio of glass fibers having a fiber length of 250 [mu] m or less among the glass fibers (B1) contained in the fiber-reinforced polyamide resin composition is 55% or less.

The present invention provides a method for manufacturing a martensitic stainless steel strip and a martensitic stainless steel strip. A method for manufacturing a martensitic stainless steel strip, comprising the following steps: a quenching step, wherein a steel strip containing C: 0.3% to 1.2% and Cr: 10.0% to 18.0% by mass and having a thickness of 1 mm or less is passed through a quenching furnace, heated to a quenching temperature, and then cooled to a temperature below the Ms point; a heat-retaining and conveying step, wherein the steel strip cooled to a temperature below the Ms point in the quenching step is conveyed to a tempering furnace while being heat-retained so as not to drop to a temperature below 80°C; and a tempering step, wherein the steel strip conveyed while being heat-retained so as not to drop to a temperature below 80°C in the heat-retaining and conveying step is passed through a tempering furnace in a non-oxidizing gas atmosphere, and heated to a tempering temperature. In addition, a martensitic stainless steel strip, wherein the amount of retained austenite is 10% to 25% by volume.

The invention relates to hydrogel based on an ice skeleton and a preparation method thereof, in the method, the ice skeleton is used as a template guide, a 30wt% PVA solution is poured and filled into the ice skeleton at the temperature of-4 DEG C to-6 DEG C, the ice skeleton is frozen at the temperature of-18 DEG C to-22 DEG C, then the ice skeleton is dissolved and removed at the temperature of 20 DEG C to 30 DEG C, and the hydrogel with a preset three-dimensional directional microstructure is obtained. According to the preparation method, an ice skeleton is used as a process route of template guiding, PVA solution filling, freezing shaping and ice melting demolding, the obtained hydrogel has a regular three-dimensional directional microstructure, the mechanical strength and the structural stability of the hydrogel are superior to those of random porous hydrogel, the technical problem that in a traditional method, biotoxicity residues exist or demolding is difficult is solved, and the preparation method is suitable for large-scale industrial production. The high biocompatibility, the high integrity and the accurate regulation and control of the orientation and the size of the hydrogel are realized.

The embodiment of the invention provides a piezoelectric element, a manufacturing method, an actuator and electronic equipment, and relates to the technical field of semiconductors. The piezoelectric element comprises a substrate, wherein the substrate comprises a cavity penetrating through the substrate; a vibration layer is arranged on the substrate and covers the cavity; the first electrode, the piezoelectric film layer and the second electrode are arranged on the vibration layer in a stacked mode, and the first electrode is in lattice matching with the vibration layer. According to the piezoelectric element provided by the embodiment of the invention, the buffer layer is used as the vibration layer, and a grinding process does not need to be used for the vibration layer, so that the film thickness error of the vibration layer is relatively small, and the performance of the piezoelectric element is improved.

This invention relates to a food packaging material and a method for manufacturing the food packaging material. The food packaging material of this invention comprises a paper substrate having a first side and a second side, the second side being opposite to the first side, wherein the paper substrate is coated with a coating on at least the first side or the second side, the coating comprising wax and a copolymer selected from styrene-butadiene copolymers and / or styrene-acrylic copolymers.

The present disclosure relates to a flame retardant compound of a novel structure having excellent flame retardant properties and improved mechanical properties, and to a flame retardant resin composition and a flame retardant product using the same.

The invention belongs to the field of materials, and particularly relates to a waste runway reclaimed rubber powder prefabricated rubber runway and a preparation method thereof. The rubber runway provided by the invention is prepared from the following components in parts by mass: 200 to 300 parts of waste plastic runway reclaimed rubber powder, 10 to 20 parts of chlorinated polyethylene rubber, 40 to 60 parts of solution polymerized styrene-butadiene rubber, 30 to 50 parts of isoprene rubber, 1.5 to 5 parts of anti-aging agent, 1 to 3 parts of accelerant DM, 0.2 to 0.6 part of accelerant TMTD, 1.5 to 5 parts of sulfur, 10 to 30 parts of naphthenic oil, 1 to 4 parts of stearic acid, 15 to 40 parts of white carbon black, 2 to 10 parts of zinc oxide and 15 to 30 parts of iron oxide red. Recycling of the waste plastic track material is achieved, and good economic benefits and environmental benefits are achieved.