36results about How to "High flexural modulus" patented technology

The invention provides a composite 3D printing material and a preparation method thereof. The composite 3D printing material is characterized by being prepared from, by weight, 40-100 parts of polyetherimide, 40-100 parts of epoxy resin, 5-10 parts of inorganic fillers, 5-20 parts of coupling agents, 0.1-0.5 part of light stabilizers, 0.1-2 parts of flatting agents, 0.1-2 parts of antioxidants, 0.1-2 parts of degassing agents and 1-6 parts of dispersed lubricants. Compared with a traditional polyetherimide material, the polyetherimide composite 3D printing material has higher strength and hardness and can be used at high temperature.

A nonwoven fabric comprising flame-retardant acrylic fibers, characterized in that it has a weight per square-meter of 70 to 190 g/m<2>, a thickness of 0.1 to 0.3 mm, a density of 0.35 to 0.8 g/cm<3>; and a nonwoven fabric comprising carbon fibers, characterized in that it has a weight per square-meter of 50 to 150 g/m<2>, a thickness of 0.1 to 0.25 mm, a density of 0.3 to 0.7 g/cm<3>, a surface roughness Ra of 30 mu m or less, a tensile strength of 0.2 kgf/cm or more, and a maximum fracture radius being defined in the specification of 20 mm or less. Said carbon fiber nonwoven fabric is produced by subjecting the flame-retardant acrylic fiber nonwoven fabric to a carbonization treatment and can be suitably used as a material for forming an electrode of a fuel cell.

Provided are: an epoxy resin composition which enables the production of a carbon-fiber-reinforced composite material having excellent tensile strength and compressive strength and suitable as a material for structures; a prepreg; and a carbon-fiber-reinforced composite material. An epoxy resin composition characterized by comprising at least [A] an epoxy resin having a structure represented by formula (1), [B] an epoxy resin having at least one amine-type glycidyl group or at least one ether-type glycidyl group and having a liquid form at 40° C. and [C] a curing agent; and a prepreg and a carbon-fiber-reinforced composite material, each produced using the epoxy resin composition.

(In the formula, R₁ to R₄ independently represent at least one atom or group selected from the group consisting of a hydrogen atom, an aliphatic hydrocarbon group having 1 to 4 carbon atoms, an alicyclic hydrocarbon group having 4 or less carbon atoms, and a halogen atom.)

The invention designs random copolymerization polypropylene thermal forming special-use resin with wide molecular weight distribution and a preparation method, the molecular weight distribution Mw / Mn of the random copolymerization polypropylene thermal forming special-use resin is 5-7; and the melt index is 3-7g / 10min. Ziegler Natta NDQ catalyst is used, ethylene is added into Spheripol process single loop tube polypropylene plant, the NDQ activity is 21000-39000g polypropylene / g catalyst, the ethylene addition amount is 1.2-2.2%wt, and by an auxiliary agent addition system, the random copolymerization polypropylene thermal forming special-use resin is produced. The synthetic method of the random copolymerization polypropylene thermal forming special-use resin with the wide molecular weight distribution can be used in industrial production using the Spheripol process single loop tube polypropylene plant of LBI company, and has the characteristics of simple technological operation and controllable polymer performance index.

A disclosed master batch applied to a polyethylene double-wall bellows comprises the following raw materials in parts by weight: 60-150 parts of an ultrafine inorganic mineral powder, 20-50 parts of high-density polyethylene resin, 8-15 parts of EVA grafted resin, 8-12 parts of organic-group modified polysiloxane, 3-4 parts of a powdery surfactant, and 3-5 parts of a polyolefin oligomer. A three-dimensional stereo structure is formed by taking high-density polyethylene resin and EVA grafted resin as matrix resin, and is taken as a scaffold of a material, so that the material is endowed with relatively good toughness and processing performances; and also the units of the three-dimensional net structure formed by the matrix resin are effectively filled with the ultrafine inorganic mineral powder, the structure formed by combination of the inorganic mineral powder and the matrix resin enables the master batch to have relatively high bending elasticity modulus, thereby guaranteeing relatively high strength, toughness and bearing capability of the bellows.

The invention provides a ceramic material for 3D printing and a preparation method thereof. The ceramic material is prepared from, by weight, 50-150 parts of zirconia powder, 10-30 parts of zirconia powder treating agents, 100-500 parts of dispersion media, 1-10 parts of single-crystal sapphire whisker, 1-10 parts of stabilizing agents and 5-50 parts of light curing agents. The single-crystal sapphire whisker is added into the zirconia ceramics, so that the modulus of elasticity in static bending and the tensile strength of the product are significantly improved, and the preparation method is used for preparing high-strength and high-toughness fine engineering ceramics.

The invention discloses a method for preparing a homo-polypropylene resin with relatively wide molecular weight distribution. A novel wide molecular weight distribution catalyst is used on a Spheripol process single-loop polypropylene device to produce a basic resin with relatively wide molecular weight distribution (Mw/Mn=4.0-5.5), and then an efficient assistant system is added to produce the homo-polypropylene resin. The efficient assistant system is shown according to parts by weight, the homo-polypropylene resin with wide molecular weight distribution is 100 parts, the other assistant additives are 0.21-0.26 part, and the homo-polypropylene resin with relatively wide molecular weight distribution, which is the product of the invention, is obtained through the operations of high-speed sufficient blending, extruding by a double-screw extruder, cooling, grain-sized dicing and drying granules. The homo-polypropylene resin with relatively wide molecular weight distribution is easy to process, the product is non-toxic and harmless, meets the environmental protection requirement, is excellent in mechanical property, and is safe and sanitary.

Main object is to provide a composition for parts of the intake system, which is capable of enhancing the flexural elasticity modulus of the parts of the intake system and reducing the specific gravity of the parts. Disclosed is a fiber reinforced resin composition for parts of intake system on the internal combustion engine comprising a block polypropylene type resin which has a MFR in the range of 40-70 g/10 minutes (at 230° C. and under a load of 2.16 kg) and which is in the range of 60-80% by weight of the composition, and glass fibers and mica the total of which are in the range of 20-40% by weight of the composition.

The invention belongs to the technical field of solvent-free polyurethane spraying materials, and particularly relates to a high-modulus rapid repairing and reinforcing material for cave depots. The material is prepared by mixing a component A and a component B according to a volume ratio of 1: 1.5, wherein the component A is prepared from the following raw materials in percentage by mass: 90-100% of isocyanate, 0-10% of one or two of polyether polyol and castor oil; the content of NCO in the component A is 26.7 to 32 percent; the molecular weight of the polyether polyol is 1000-2000, and the functionality of the polyether polyol is 2; the component B is prepared from the following raw materials in percentage by mass: 14.5 to 44.5 percent of polyhydric alcohol with the functionality of 3 or polyhydric alcohol with the functionality of 4 or a mixture of the polyhydric alcohol with the functionality of 3 and the polyhydric alcohol with the functionality of 4, 5 to 10 percent of a chain extender, 35 to 50 percent of one or two of glass fiber powder or wollastonite powder, 0.3 to 0.6 percent of a catalyst CUCAT-HA01, 0.3 to 0.5 percent of a silane coupling agent, 10 to 20 percent of a latent curing agent and 0.2 to 0.4 percent of a hydrolysis accelerant. The material disclosed by the invention is used for quickly repairing a wet base material, is high in curing speed and can be put into application after being cured.

The invention discloses a fire-proof and damp-proof PVC compound stabilizer wood-plastic composite and belongs to the technical field of wood-plastic materials. The fire-proof and damp-proof PVC compound stabilizer wood-plastic composite is prepared from, by weight, 25-50 parts of fire-proof and damp-proof PVC compound stabilizer, 5-80 parts of wood fiber, 1-8 parts of epoxidized soybean oil and 1-6 parts of pigment. The invention further discloses a preparation method of the fire-proof and damp-proof PVC compound stabilizer wood-plastic composite. According to the fire-proof and damp-proof PVC compound stabilizer wood-plastic composite, by adding the metal halide modified PVC composite stabilizer, the fire-proof and damp-proof temperature is decreased to 200 DEG C or below; meanwhile, PE and PP are added for improving the impact resistance of the PVC composite stabilizer, so that the wood-plastic composite product has high bending strength, bending elastic modulus and gap-free impact resistance strength and can partially replace structural materials. The preparation method of the fire-proof and damp-proof PVC compound stabilizer wood-plastic composite has good practicability, and can produce good economic benefits and social effects.

The invention discloses a high-compression-resistance MPP solid-wall pipe and a preparation method thereof. The high-compression-resistance MPP solid-wall pipe is prepared from the following raw materials in parts by weight: 100 parts of modified polypropylene, 0.5-15 part of tackifier, 0.1-15 part of nano material, 0.1-15 part of liquid crystal material, 0.5-15 part of impact modifier, 0.1-15 part of nucleating agent, 0-30 parts of filling masterbatch, 0.5-5 part of color masterbatch, 0.5-30 part of engineering plastic. The high-compression-resistance MPP solid-wall pipe manufactured by usingthe raw materials is good in rigidity, high in bending strength, high in bending elasticity modulus, high in ring stiffness, good in impact strength and corrosion resistance, and good in long-term load resistance and compression resistance at high temperature due to good rigidity, high strength, so that the wall thickness can be reduced, the cost can be reduced, the energy can be saved, and the production efficiency can be improved. The solid-wall pipe can satisfy the requirements of high-standard quality electric power engineering.

The invention discloses flame-retardant calcium carbonate wood plastic and belongs to the technical field of wood plastic materials. The flame-retardant calcium carbonate wood plastic comprises, by weight, 20-95 parts of flame-retardant calcium carbonate, 5-80 parts of wood fibers, 1-8 parts of lubricant and 1-6 parts of pigment. The invention further discloses a preparation method of the wood plastic. According to the flame-retardant calcium carbonate wood plastic, calcium carbonate modified through metal halide is added, so that flame retardancy is lowered to 200 DEG C or below; meanwhile, PE and PP are added to improve impact resistance of calcium carbonate, so that a wood plastic product is high in bending strength, flexural modulus and unnotched impact strength, and the flame-retardant calcium carbonate wood plastic can partially replace structural materials; by means of the preparation method of the flame-retardant calcium carbonate wood plastic, good practicability is achieved, and good economic benefits and social effects are achieved.