14 results about "Toughening" patented technology

The invention relates to a 3D printing modified polyamino acid material. Raw materials for preparing the 3D printing modified polyamino acid material comprise, by weight, 75-85 parts of polyamino acid, 1-5 parts of a chain extender, 1-5 parts of a crosslinking agent, 0.5-1 part of a nucleating agent, 5-10 parts of a toughening agent, 0.1-0.5 parts of a thermal stabilizer, 1-5 parts of a reinforcing agent and 0.3-0.8 parts of an antioxidant. A low temperature crushing mixing reaction technology is used to modify polyamino acid, so the toughness, the impact strength and the thermal deformation temperature of the modified polyamino acid are greatly improved, thereby the polyamino acid material has a good application prospect in 3D printing.

The invention discloses a high-molecular self-lubricating material and a preparation method of the high-molecular self-lubricating material. The high-molecular self-lubricating material is prepared from the following ingredients in parts by weight: 100 parts of polybutylene terephthalate resin, 5 to 30 parts of aramid fiber, 3 to 20 parts of wear-resistant agents, 5 to 12 parts of toughening agents, 0.1 to 2.0 parts of antioxidants and 0.1 to 2.0 parts of stabilizing agents. The high-molecular self-lubricating material has the advantages that the mechanical property is excellent; the wear-resistant performance is excellent; the dimension stability is high. The invention also discloses a plate spring flanged bushing, which is made of the high-molecular self-lubricating material through injection molding. The plate spring flanged bushing has the advantages that the structure is simple; the weight is light; the maintenance is avoided; the abrasion resistance is realized.

The invention discloses a disposable medical syringe needle which comprises a needle base, a hollow needle tube and a jacket, wherein the rear end of the hollow needle tube is connected with the needle base; the front end of the jacket is closed and is detachably sleeved on the needle tube; the needle base and the needle tube have an integrated structure and are once formed in an injection molding mode by using a compound material; and the compound material is composed of following resins and fillers by weight percent: 40%-79% of substrate resins, 0-10% of toughening resins and 20%-60% of fillers. According to the disposable medical syringe needle provided by the invention, the needle tube and the needle base are integrally molded by using the compound material; the compound material has higher strength, toughness and hardness; a stainless steel needle tube can be replaced by the needle tube made of the compound material; after injection is finished by medical personnel, a needle point can be burnt, so as to close a needle hole and passivate or eliminate the needle point; the possibility of the propagation of remained liquid medicine or diseases through the syringe needle is fundamentally eliminated; the risk of accident stab is reduced; and the risk of breaking the needle tube in human body is reduced by using the integrated needle tube and needle base.

The invention discloses a biodegradable 3D printing toughening material and a preparation method, which consists of the following components by weight: polylactic acid (PLA): 70-80 parts; EVA: 30-20 parts; toughening agent: 6-8 parts; compatibilizer: 0.4-5.0 parts; auxiliary agent: 0.2-2.0 parts. The toughening agent is dioctyl phthalate (DOP); the compatibilizer includes maleic anhydride grafted polymer, which is a tertiary polymer formed by copolymerization of methyl methacrylate, butadiene and styrene copolymer. Copolymer; terpolymer (SAG) formed by copolymerization of styrene, acrylonitrile and glycidyl methacrylate. One or two or more compatibilizers are used together. The 3D printing composite material prepared by the invention is non-toxic and environment-friendly, has superior comprehensive performance, and has broad market prospects and application value.

This invention relates to a screen type half protection sleeve for wires and cables, which is composed of two half parts, a leg and a groove are set between the two parts to form a locking unit to each other and the formula of the material of the sleeve is in the following weight proportions: polyolefin plastic: 100, metal powder: 5-20, carbon black: 5-65, stabilizer: 0.3-15 and toughening midified booster: 0-16.

The invention provides straw-based composite filler. The straw-based composite filler is a compound with a core-shell structure, wherein straw powder particles are used as a core of the compound with the core-shell structure; a cladding film which is grafted with the straw powder particles and contains an acrylamide copolymer is used a shell layer of the compound with the core-shell structure; the straw powder particles are particles which are obtained by crushing straw powder to 30 meshes to 200 meshes; the cladding film shell layer containing the acrylamide copolymer is formed by copolymerizing monomers (a), (b) and (c). The novel straw-based composite filler provided by the invention has the core-shell structure; a surface polymer film of the shell layer has a function of not desorbing and also has hydrophily and cationic property; when the straw-based composite filler is used for paper filling, the net retention rate is kept, even improved, and the effects of enhancing and toughening can be realized. Therefore, properties of the straw-based composite filler can be sufficiently utilized and the straw-based composite filler is used as special filler of the paper.

The invention discloses heat-resisting and high-breathability composite modified water glass sand used for a pump valve casting. A modified water glass bonding agent in the water glass sand has superior constant-temperature and constant-humidity strength compared with a conventional water glass bonding agent, thixotropy and the rheological property are better, reaction bonding activity is high, environment friendliness is achieved, a good bonding effect can be achieved with few bonding agents, the use amount of water glass is reduced, and scattering cleaning is easier. Added microcrystal ceramic powder has the effects of strengthening, toughening and the like, and smoothness and strength of the surface of molding sand are improved; breathability of the molding sand can be improved through superfine polyving akohol micro powder, and even and micro air holes are formed; molten metal is not likely to permeate; and nanometer calcium fluoride loaded by bentonite is scattered in sand and has the effects of lubricating and strengthening, a non-stick impermeable layer can be formed, and sand sticking of the casting is avoided. The composite modified water glass sand is good in comprehensive performance, good in thermal stability, high in precision and capable of meeting the requirement for pouring of the high-precision pump valve casting.

The invention discloses a nano lanthanum oxide modified talcum powder enhanced polyphenylene sulfide-based heat dissipating material for LED. After the composite material is modified by nano lanthanum oxide at high temperature, talcum powder is used as toughening and reinforcing packing, stearic acid is mixed to the surface of the talcum powder, the modified composite packing and polyphenylene sulfide are compatible well, agglomeration of small-grain-size particles is improved effectively, the small-grain-size particles can be uniformly dispersed in macromolecules, stable and efficient modification effect is achieved, processing property and mechanical property of the polyphenylene sulfide are improved effectively, added nano copper and carbon nano tube composite heat conduction packing are adsorbed and combined to master batches well, heat conduction property of the composite material is improved effectively, strength and plasticity of the material are improved, and the composite material with good mechanical property and good heat conduction property is prepared and has wide application space in the aspect of LED packaging.

The invention discloses anti-gluing solid lubricating paint as well as a preparation method and an applying method thereof. The paint comprises the following ingredients in percentage by weight: 16-60% of mixed resin, 1-5% of a toughening agent, 26-70% of a solid lubricant, 2-15% of an anticorrosive etching reagent, 1-5% of a wear-resisting additive, 0.01-0.1% of other additives and the balance of a solvent. The paint, the preparation method and the applying method have the advantages that the thickness of a coating can be conveniently controlled according to a surface coating method of a joint of an oil casing; the process is simple; the operation is easy; the industrial implementation is realized conveniently.

The invention relates to a reinforced and toughened polypropylene composite material and a preparation method thereof. A nano calcium carbonate master batch, a carbon nano tube/graphene master batch and polyamide6 (PA6) resin are used as reinforcing and toughening fillers; a maleic anhydride grafted polyolefin copolymer is used as a compatilizer; and strength and toughness of a polypropylene (PP)composite material are obviously improved through synergistic reinforcing and toughening effects among a plurality of materials comprising the nano calcium carbonate, the carbon nano tube/graphene andthe PA6 resin, so that the problem that a polypropylene composite material filled with a single inorganic filler is insufficient in strength and toughness is solved, and the application range of thepolypropylene composite material is widened.