16results about How to "High strength retention" patented technology

The invention relates to the technical field of engineering plastic modification, and discloses a thermal deformation resistant engineering plastic and an air conditioner fan blade, the thermal deformation resistant engineering plastic comprises the following components: 55%-60% of polyphenylene sulfide, 20%-25% of long glass fiber, 3%-5% of nano silica, 1%-2% of a graphene filler, 8%-10% of a benzimide flexibilizer, 0.5%-1% of a cross-linking agent, and 0.2%-0.5% of an antioxidant, the invention further discloses the heat-deformation-resistant air conditioner fan blade, the heat-deformation-resistant air conditioner fan blade is prepared from the heat-deformation-resistant engineering plastic, and the preparation method of the heat-deformation-resistant air conditioner fan blade comprises the steps that the engineering plastic is subjected to injection molding through an injection molding machine, the temperature of a charging barrel is set to be 290-320 DEG C, the temperature of a mold is set to be 290-320 DEG C, and the pressure maintaining time is 15-20 seconds. The silane coupling agent is adopted to perform surface modification on the glass fiber and the nano filler, so that the problems of low high-temperature strength retention rate, poor dimensional stability and high brittleness in the prior art are effectively solved.

The invention discloses foam concrete based on acidic iron tailing sand. The foam concrete comprises the following components in parts by weight: 200-500 parts of cement, 100-400 parts of acidic iron tailing sand, 50-150 parts of superfine slag powder, 15-25 parts of a composite acid-resistant foaming agent solution, 1-10 parts of composite fibers and 200-300 parts of water, the composite acid-resistant foaming agent solution is prepared by mixing a composite acid-resistant foaming agent and water, and the composite fiber comprises a combination of organic reinforced fiber and inorganic modified fiber. According to the preparation method, the long-term stability and the acid resistance of the foam concrete can be remarkably improved, and meanwhile, the overall performance of the foam concrete is remarkably improved by utilizing the acid resistance and the high temperature resistance of the polymer coated aluminum silicate fibers.

The invention discloses a degradable carton containing modified plant fibers and a preparation method of the degradable carton, and relates to the technical field of carton production. According to the degradable carton containing the modified plant fiber, the degradable carton is formed by splicing corrugated boards, and the corrugated boards are prepared from, by mass, 45-60 parts of the modified plant fiber, 25-35 parts of paper pulp, 5-10 parts of a biodegradable adhesive, 5-15 parts of filler, 1-5 parts of a reinforcing agent, 0.5-3 parts of a waterproof agent and 90-110 parts of deionized water. Through synergistic modification of alkali treatment and an exclusive interface coupling agent, hydrophilic hydroxyl groups on the surfaces of the natural plant fibers are effectively hydrophobized, and the interface compatibility and dispersion uniformity between the fibers and a paper pulp matrix are remarkably improved, so that the overall compressive strength and structural stability of the carton are greatly improved; the problem that the mechanical property is reduced due to direct use of natural plant fibers is solved.

The invention provides a high-shock-resistance low-precipitation phosphate ceramic structure adhesive which comprises the following components in parts by weight: 100 parts of aluminum dihydrogen phosphate, 8-15 parts of zinc oxide powder, 35-45 parts of flaky aluminum oxide powder, 5-10 parts of nano zirconium oxide powder and 0.5-2 parts of layered zirconium phosphate powder. The ceramic further comprises 0.5-2 parts of titanium oxide powder and 5-10 parts of spherical aluminum oxide powder. The invention also discloses a preparation method and application of the adhesive. The adhesive disclosed by the invention can work for a long time at 500 DEG C or below, has high strength retention rate at high temperature, and solves the problem of easy failure at high temperature; through the toughening design, the impact resistance and thermal shock resistance are remarkably improved, and cracking in use is effectively prevented; the paint has good stability to acid, alkali, solvents and other chemical media, and is suitable for partial corrosive environments; the ion precipitation rate is extremely low, and the strict requirements of the fields of biological medicine, food and the like on the material purity are met; and the curing temperature is moderate, a precise matrix is not easy to damage, and on-site construction and complex structure bonding are facilitated.

The invention discloses a low-free-formaldehyde sodium glutamate-based gypsum retarder as well as a preparation method and application thereof, and belongs to the technical field of building material admixtures. The preparation method comprises the following steps: by taking sodium glutamate and formaldehyde as raw materials, carrying out an addition reaction at low temperature under a weakly alkaline condition regulated by calcium hydroxide to generate an intermediate; and then heating under an acidic condition to carry out dehydration polycondensation, and neutralizing by negative pressure and lime milk to prepare the sodium glutamate-formaldehyde condensation compound. The invention also discloses a retarder composition containing the condensate and a phosphate / zinc sulfate mixture. According to the invention, the content of free formaldehyde (1t; 300 mg / kg) is obviously reduced through improvement; the problem that the strength of gypsum is reduced due to a traditional retarder is solved by using the chelation of calcium ions and zinc sulfate.

The application provides a wax emulsion for cotton fiber finishing and a preparation method thereof, and relates to the technical field of cotton fiber finishing. The wax emulsion for cotton fiber finishing comprises 36-38 parts of paraffin wax and Brazil palm wax, 4-6 parts of an emulsifier, 0.01-0.2 parts of an acid and 56-60 parts of water. The mass ratio of the paraffin wax and the Brazil palm wax is (8-12):1. The mass ratio of the total amount of the paraffin wax and the Brazil palm wax to the emulsifier is (6-9):1. The emulsifier comprises non-ionic emulsifiers and cationic emulsifiers in a mass ratio of (1-5):1. The non-ionic emulsifiers are fatty alcohol polyoxyethylene ethers. The wax emulsion has a small amount of emulsifier, a particle size of less than 100 nm, and does not separate or precipitate at room temperature. The wax emulsion can be effectively combined with cotton fibers, can be used for yarn softening finishing, can improve the wear resistance and softness of cotton fibers, and can ensure a high strength retention of cotton fibers.

The application discloses a paper-based and pulp molded product strong water-based structure resin composition for constructing a fiber matrix, a kit and a preparation and application method thereof, and belongs to the technical field of papermaking wet end chemistry and pulp molding materials. In response to the global trend of replacing plastic with paper and fluorine-free control of food contact materials, the application aims at the pain point of failure of traditional chemicals in a high recycling pulp proportion and a closed water circulation high conductivity system, and constructs an acrylic polycarboxylic acid polymer and inorganic-organic dual charge buffer synergistic system. The scheme realizes the multiplication effect of physical strength such as breaking and ring pressure and the water resistance and oil resistance barrier performance by a unique crosslinking mechanism at a very low dosage, which is better than conventional enhancement technology on the market. The composition is a full water-based system and does not contain perfluorinated compounds, which ensures complete pulp recycling while giving the product excellent wet stiffness and film-forming density, and provides a green solution with high efficiency, low cost advantage and compliance for the papermaking and pulp molding industry.

The invention discloses application of monofunctional isocyanate in surface blocking modification of PA66 industrial yarn, and belongs to the technical field of polyamide fibers. Aiming at the problems of high hydrolytic sensitivity and poor long-term stability of PA66 in a humid environment, monofunctional isocyanate can react with an amino-terminated group on the outermost layer of the PA66 fiber to form an alkyl / aryl urea terminated structure, a formed urea bond is more resistant to hydrolysis than an amido bond, and a monofunctional design ensures that a body type cross-linked network is not formed, so that the service life of the PA66 fiber is prolonged, and the service life of the PA66 fiber is prolonged. The modification reaction is limited to occur only on the surface layer, performance loss caused by internal modification can be avoided, the strength retention rate of the obtained surface-terminated modified PA66 industrial yarn in a high-damp-heat environment is high, the industrial application requirement for long-term durability is met, and the application prospect is wide. Therefore, the composite material has a good application prospect in preparation of radial tire cord fabrics, automobile safety belts, industrial conveying belts or high-pressure rubber hose reinforcing layers.

The invention provides a method and system for regenerating fibers from waste textiles, and relates to the technical field of textile equipment. The method comprises the following steps: firstly, slitting a waste textile raw material through a vertical crossing slitting unit to obtain a cloth piece with a preset size; then, auxiliary agent spraying and steam ageing treatment are carried out on the cloth pieces, so that cohesive force between fibers is reduced; then carrying out flexible pretreatment, gradually loosening a warp and weft yarn structure through a needling device, and carrying out preliminary opening; then, through the multi-stage opening and impurity removal step, the materials are converted into a single fiber state in combination with a material distribution mechanism; the fibers are atomized and humidified in the conveying or storage process so as to maintain the water content and the strength; then fully carding through a carding and fiber separating machine, and separating the single fibers into at least three types of long fibers, medium and short fibers and ultra-short fiber components according to the difference between the fiber length and aerodynamic characteristics; and finally, respectively collecting and packaging the fibers with different length components. According to the invention, high-valued cyclic utilization of the waste textiles is realized.

The application discloses an ultra-high molecular weight polyethylene fiber reinforced polyether ether ketone composite material and a preparation method and application thereof, and belongs to the technical field of high-performance fiber reinforced resin matrix composite materials.The application realizes the synergy of surface activation and thermal protection of the ultra-high molecular weight polyethylene fiber by means of a synergistic modification strategy of photo-initiated grafting and elastomer coating and a fast hot-pressing composite process, and significantly improves the interfacial bonding capacity with a polyether ether ketone matrix on the premise of maintaining the original mechanical properties of the ultra-high molecular weight polyethylene fiber.

The application relates to the adhesive technical field and discloses a sisal polishing wheel setting adhesive and a preparation method thereof, wherein the sisal polishing wheel setting adhesive is prepared by compounding a specific formula of vinyl-acrylic emulsion, silica sol, ethylene-vinyl acetate copolymer emulsion and a thickening agent; the vinyl-acrylic emulsion is prepared by deionized water, vinyl acetate, butyl acrylate, methyl methacrylate, acrylic acid, a functional monomer, a composite emulsifier and an oxidation-reduction initiation system through a specific pre-emulsification-step-by-step dropping process. The functional monomer is introduced to participate in copolymerization, a chemical bridge between a polymer and sisal fibers is constructed, the composite silica sol forms a Si-O-Si inorganic network and produces strong hydrogen bond action with the organic polymer chain, the VAE emulsion is added to improve the flexibility of the adhesive film and the wettability of the plant fibers, the three are synergistic, a stable interpenetrating network structure is formed, and the technical problems that the traditional setting adhesive is poor in temperature resistance, insufficient in wear resistance, difficult to consider environmental protection and performance at the same time are solved.

The invention provides a photocuring lining hose and a preparation method thereof, the hose is obtained by sequentially combining a polyethylene film layer, a photocuring fiber resin layer and a polytetrafluoroethylene film layer from inside to outside, the light-curing fiber resin layer is prepared by brushing light-curing resin on two sides of glass fiber cloth; the photocuring resin comprises the following components in parts by weight: 110 parts of epoxy photosensitive modified polyester resin, 2-5 parts of a thickening agent, 32-42 parts of a diluent and 1-2 parts of a defoaming agent; the preparation method of the epoxy photosensitive modified polyester resin comprises the following steps: adding 50-60 parts by weight of epoxy resin and 2-5 parts by weight of a catalyst hexadecyl trimethyl ammonium bromide into 100 parts by weight of unsaturated polyester, and adding 1-3 parts by weight of a polymerization inhibitor hydroquinone when the reaction temperature is 110-120 DEG C, the reaction time is 2 hours and the acid value is lower than 7 mg KOH / g, so as to obtain the epoxy photosensitive modified polyester resin. Then adding 60-65 parts of an active monomer and 5-8 parts of modified hyperbranched polyurethane, keeping the temperature at 80-90 DEG C and stirring for 1 hour, cooling to 70 DEG C or below, adding 4-7 parts of an ultraviolet light initiator, and uniformly mixing to obtain the water-based paint. The tensile strength and the moisture resistance of the product are comprehensively improved.

This invention discloses a high-temperature resistant and creep-resistant asbestos-free composite sealing board and its preparation method. The board is made from raw materials comprising 30-50 parts inorganic fibers, 10-20 parts high-temperature resistant organic fibers, 25-45 parts high-temperature resistant functional fillers, and 8-18 parts composite binder. The composite binder is pre-mixed from liquid phenolic resin and nano-silica sol at a dry weight ratio of 1:(0.5-2). The board has a localized inorganic reinforcing network formed by the accumulation and curing of nano-silica sol in the pores and interfaces of the fiber network. The preparation method includes: fiber dispersion and pulping, composite slurry preparation, wet paper forming, supplementary impregnation and pre-curing, segmented hot pressing curing, and post-heat treatment. This invention, by combining an organic-inorganic composite bonding system with a specific process, significantly improves the board's resistance to compression creep and sealing durability at high temperatures, solving the technical problem of easy loosening and leakage of traditional asbestos-free sealing materials under extreme conditions.

The application discloses a composite gel particle plugging agent for plugging steam channeling and preparation and application thereof, and belongs to the technical field of oil field chemistry. The plugging agent has a triple composite structure of "rigid inorganic core-elastic gel shell-oil-soluble surface layer", the elastic gel shell penetrates and is chemically anchored in the porous structure of the core through a crosslinked network, and an organic-inorganic interpenetrating interface is formed. The surface modifier is an oil-soluble polymer. The plugging agent realizes the synergy of rigid support, elastic plugging and flexible selectivity, so that the volume retention rate of the plugging agent is greater than or equal to 85%, the single-particle compressive strength is greater than or equal to 1.5 MPa, and the ratio (selectivity index) of the plugging rate of the water phase channel to the damage rate of the oil phase channel is greater than or equal to 7.0 after the plugging agent is aged for 7 days in a steam environment at 300 DEG C and a salinity of 20*10 4 mg / L, and the technical problems of easy failure, low plugging strength and lack of flexible selectivity of existing plugging agents under extreme high temperature and high salinity are effectively solved.

The application discloses a kind of fire-retardant lignin-based formaldehyde-free adhesive and preparation method thereof, belong to adhesive preparation technical field, for solving in prior art, adhesive bonding strength and flame retardant performance need to be further improved technical problem;The present application is with lignin as main body, sequentially through triazine, phosphonate and nitrogenization modification, introduce nitrogen, phosphorus and polar group, prepare fire-retardant glue precursor, then combine catechol polyol and boric acid reaction generated borate polyol, and the hybrid prepolymer obtained by the action of amino POSS sol and glycerol carbonate, synergistic curing under the action of initiator, construct dense stable crosslinking network, the system has the environmental protection of lignin and the stability of organic-inorganic hybrid material, give adhesive high strength, excellent water resistance and flame retardant performance, and formaldehyde release is zero, suitable for green environmental protection field application.

The application relates to the technical field of electronic paste, and relates to lead-free sealing silver paste for vacuum glass and a preparation method thereof. The lead-free sealing silver paste comprises spherical silver powder, lead-free low-temperature glass powder, an organic carrier and a functional additive. The lead-free low-temperature glass powder is a Bi2O3-B2O3-ZnO-CuO system and / or a V2O5-P2O5-TeO2-ZnO system. The organic carrier comprises alpha-terpineol, ethyl cellulose and ester alcohol twelve, and other additives can be added. The functional additive is selected from polyether acid, silane coupling agent, hydrogenated castor oil and the like. The lead-free sealing silver paste can complete sintering at low temperature, has high adhesive strength and high air tightness with tempered glass, has high strength retention rate for the tempered glass, low air release rate, good cold and hot cycle stability, and completely meets environmental protection requirements, and has the characteristics of low cost, high performance and green environmental protection.