40results about How to "Avoid impact on mechanical properties" patented technology

The invention belongs to the technical field of polymer materials, and in particular relates to a flame-retardant and antistatic thermoplastic polyurethane elastomer and its preparation method and application. The flame-retardant and antistatic thermoplastic polyurethane elastomer is composed of the following raw materials in parts by weight: 100 parts of thermoplastic polyurethane elastomer , 1-20 parts of flame retardant, 1-10 parts of antistatic agent, 1-20 parts of plasticizer and 0.05-0.2 part of antioxidant; the polyurethane elastomer prepared by the present invention has excellent flame retardant and antistatic properties , and its preparation method is simple and feasible.

The invention relates to a Ti-Al-Mo-N multi-component hard gradient film as well as a preparation method and application thereof, and belongs to the technical field of special material preparation. The Ti-Al-Mo-N multi-component hard gradient film comprises the following components in percentage by mass: 55-85% of Ti, 8-30% of Al, 4-15% of Mo and 3-25% of N. Through arc ion plating, the Ti-Al-Mo-N multi-component hard gradient film can be prepared into a coating with a substrate / TiN / Ti-Al-Mo-N, and the coating can be applied to the fields of papermaking and printing. The preparation method provided by the invention is reasonable in component design, simple in technology, and convenient for large-scale application, especially the large-scale application to the field of printing.

The invention discloses a 3004 aluminum foil, a preparation method and application thereof. The aluminum foil contains the following chemical elements in mass percentage: Si 0.15-0.25%, Fe≤0.55%, Cu 0.14-0.2%, Mn 1.02-1.15%, Mg 0.95-1.1%, Cr≤0.05%, Zn≤0.15 %, Ti 0.015~0.025%, other <0.1%, and the rest is Al. Through smelting, refining, standing still, on-line degassing and slag removal, casting, milling, soaking treatment, hot rolling, cold rolling, intermediate annealing, cold foil rolling and finished product annealing, 3004 is obtained after the finished product annealing Aluminum foil; through the combination of various elements and the preparation process, the aluminum foil prepared has high strength and good toughness. When used as a container, the thinness is greatly reduced, it is convenient to use, and the amount of raw materials is reduced; Using discarded cans as raw materials reduces raw material consumption, realizes resource reuse, broadens the source of raw materials for preparing aluminum foil, avoids the burden on the environment, reduces production costs, and has good social and economic benefits.

The invention discloses a method for reliably connecting a flexible thin-film solar cell and an airship envelop. According to the method, solar cells are interconnected through brocade silk ropes which penetrate through stainless steel buttonholes, thereby realizing assembly in an array manner; the solar cells and lateral connecting cord fabrics welded on the airship envelop are connected with each other through the brocade silk ropes which penetrate through the stainless steel buttonholes, thereby realizing the reliable connection between a solar cell array and the envelop; and a multi-layer thermal insulation assembly is closely connected with the airship envelop by employing nylon fasteners (groups), thereby realizing the isolation of waste heat of the solar cells and solving the problem of thermal coupling between the solar cells and the airship envelop. The connecting method can be widely applied to various airship platforms which generate power by solar energy and has wide military and civil application prospect.

The invention relates to a spray-rolling type loose fiber washing machine, and belongs to the technical field of loose fiber dyeing. The spray-rolling type loose fiber washing machine comprises a cotton conveying roller, a transmission component and a spraying component. The cotton conveying roller is arranged in front of the transmission component, the transmission component is composed of a guide belt, a roller and a drive roller, the guide belt is horizontally arranged, and the drive roller drives the guide belt to move synchronously with the cotton conveying roller. The spraying component is located above the guide belt and used for washing the loose fibers below the spraying component, and the roller is matched with the guide belt to be mounted and used for squeezing the loose fibers which are conveyed to the guide belt through the cotton conveying roller. The spray-rolling type loose fiber washing machine is used for a loose fiber washing process, and has the advantages of being even in dyeing, small in water consumption, simple in process, and the like.

The invention relates to an in-situ self-generated TiB reinforced β-titanium alloy composite material, including TiB and β-titanium alloy, wherein the volume ratio of TiB is 1-2.5%, and the β-titanium alloy is Ti-5Al-5Mo-5V-3Cr- 1Zr. The present invention also relates to a method for preparing an in-situ self-generated TiB reinforced β-titanium alloy composite material, comprising: preparing an in-situ self-generated TiB-reinforced β-titanium alloy Ti-55531 composite ingot by using a vacuum consumable arc melting method; Multi-pass piercing and near-isothermal thermoplastic deformation blanking; multi-pass pier drawing and near-isothermal thermoplastic deformation forging for the billet forging blank; multi-pass hot rolling for the modified forging blank to obtain titanium-based composite material blank; The titanium-based composite billet is subjected to solution heat treatment, and the solid solution forging billet is subjected to aging heat treatment to obtain TiB reinforced β titanium alloy composite material. The purpose of the in-situ self-generated TiB reinforced β titanium alloy composite material and its preparation method is to solve the problem of how to realize the good matching of ultra-high strength, high stiffness and plasticity of the β titanium alloy.

The invention discloses a fame-retardant polyester material with a high glow wire ignition temperature and a preparation method thereof. The flame-retardant polyester material with a high glow wire ignition temperature is composed of the following components in parts by weight: 100 parts of polyester resins, 15-50 parts of bromine-series flame retardant, 5-20 parts of synergistic flame retardant, 0-20 parts of toughening agent, 0-80 parts of carbon forming agent, 5-40 parts of hot oxygen barrier agent, 0-120 parts of fibrous reinforcing agent and 0-10 parts of processing aid. The preparation method of the flame-retardant polyester material with a high glow wire ignition temperature comprises: drying the polyester resins, mixing with other components to obtain a premixed material, then feeding the premixed material into a twin-screw extruder, melting and plasticizing, kneading and mixing, extruding, drawing, cooling, pelletizing, drying and finally packaging. The flame-retardant polyester material with a high glow wire ignition temperature has the advantages of low cost, high glow wire ignition temperature, similar mechanical strength to ordinary flame-retardant polyester and wide application range.

The invention discloses a preparation method of a ceramic reinforced carbon / carbon composite material brake disc. The preparation method comprises the following steps that a carbon fiber prefabricatedbody is put into a deposition furnace, firstly, a chemical vapor-phase permeation process is adopted, then liquid-phase resin or liquid-phase asphalt is used for carrying out a dipping-carbonizationprocess, and a carbon / carbon composite material brake disc blank body is obtained; a liquid-phase siliconizing treatment is carried out on the blank body so as to obtain a disc body with the density of 2-2.2 g / cm<3>; and machining is carried out according to the shape and the size of the required brake disc so as to obtain the ceramic reinforced carbon / carbon composite material brake disc. According to the preparation method, the reasonable composition proportion and the preparation process are adopted, so that the high-quality ceramic reinforced carbon / carbon composite material brake disc with excellent mechanical property, oxidation resistance, friction resistance and wear resistance is prepared; the bake disc is light in weight, good in braking performance, short in production period and capable of realizing industrial production, the brake performance of a brake system of a transport vehicle can be improved, the weight of the brake system can be reduced, the service life of the brake disc is prolonged, and a good market prospect is achieved.

The invention discloses an antibacterial silk product loaded with nano-copper and a preparation method of same. The method includes the steps of: soaking a silk product in a buffer solution containingmonascus bacteria, adding a copper salt acid solution to soak the silk product, and performing ultraviolet reduction treatment; finally cleaning and drying the product to prepare the antibacterial silk product loaded with nano-copper. The method can improve the broad-spectrum antibacterial effect of the silk fibers and a fabric thereof, can avoid damage on human body and pollution on environment.The preparation method is simple and is easy to carry out in large scale production. The antibacterial silk product has excellent and durable antibacterial function.

The invention discloses a preparation method of a high-flame-retardant cross-linked polyphosphazene elastomer. The technical scheme specifically comprises the following steps: performing a substitution reaction process on ethylene glycol monosodium, sodium phenolate and hexachlorocyclotriphosphazene under an ice bath condition and nitrogen protection to prepare hydroxyethyl phenoxy cyclotriphosphazene, and performing a substitution reaction process on ethoxy phenoxy cyclotriphosphazene sodium, sodium phenolate and polydichlorophosphazene to prepare the ethoxy phenoxy cyclotriphosphazene phenoxy polyphosphazene elastomer. The ethoxyphenoxy cyclotriphosphazene substituent synthesized in the scheme is large in volume, strong in steric effect and high in phosphorus and nitrogen element content, the polyphosphazene elastomer can be used as the cross-linking point of phosphazene chain segment entanglement, such that the product has advantages of excellent flame retardancy, excellent thermalstability and excellent mechanical property while the room temperature cross-linking is achieved, the synthesis process of the high-flame-retardant high-performance polyphosphazene elastomer is effectively optimized, and the important significance is provided for the low-cost and large-scale industrial production of the high-performance cross-linked polyphosphazene elastomer.