38results about How to "Give full play to the toughening effect" patented technology

The invention relates to a modified polycarbonate material applied to 3D printing. The modified polycarbonate material is prepared from the following components in parts by weight: 100 parts of polycarbonate, 0 to 10 parts of a thermotropic liquid crystal polymer, 10 to 25 parts of polycaprolactone, 8 to 15 parts of a flexibilizer, 0 to 2 parts of hydrophobic fumed silica, 0.2 to 0.5 part of a hindered phenol antioxidant and 0.2 to 0.5 part of a phosphite antioxidant. The modified polycarbonate material applied to 3D printing can be printed and molded at a temperature of 260 DEG C, and is highin mechanical property, relatively high in tensile strength and notch impact strength and has low probability of thermal degrading; a printed product has no warping and deformation, has low probability of cracking and has a smooth and flat surface.

The invention relates to a sintered fused alumina zirconia refractory raw material and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: placing alumina powder into a ball forming mill, and spraying ball forming liquid to obtain blank balls being 18-28mm in diameters, wherein the mass ratio of the alumina powder to the ball forming liquid is 1:(0.16-0.22); introducing the blank balls into a drying chamber of a high-temperature shaft kiln, drying at the temperature of 450-650 DEG C for 70-100 minutes, introducing the dried blank balls into a burning chamber of the high-temperature shaft kiln, preserving heat at the temperature of 1,850-1,900 DEG C for 25-45 minutes, cooling along with the kiln, smashing, sieving and packaging to obtain the sintered fused alumina zirconia refractory raw material. A preparation method of the ball-forming liquid comprises the following steps: preparing 86-92 percent by weight of zirconium oxychloride, 4-9 percent by weight of calcium salt or magnesium salt, 1-6.5 percent by weight of yttrium chloride and 0.5-3 percent by weight of cerium chloride to serve as raw materials; adding water into the raw materials in a solid-liquid ratio of 40-120g / L; stirring till clarification. The sintered fused alumina zirconia refractory raw material is low in cost, is suitable for industrial production, is uniform in structure and has superior thermal shock stability.

The invention relates to a preparation method of a modified polycarbonate material for 3D printing. The method comprises the following steps: weighing, by weight, 100 parts of polycarbonate, 0-10 parts of a thermotropic liquid crystal polymer, 10-25 parts of polycaprolactone, 8-15 parts of a toughening agent, 0-2 parts of hydrophobic fumed silica, 0.2-0.5 part of a hindered phenolic antioxidant and 0.2-0.5 part of a phosphite antioxidant, mixing above raw materials, adding the obtained mixture into a twin-screw extruder, performing extruding granulation, drying obtained pellets, adding the dried pellets into a single-screw extruder, performing extrusion to obtain a plastic melt, and performing hot water treatment, cold water cooling setting and air drying on the plastic melt to obtain a wire. The method is convenient and economical, and is suitable for mass production, the prepared modified polycarbonate material for 3D printing has the advantages of realization of printing at a temperature of 260 DEG C or less, high tensile strength, high notched impact strength, and no thermal degradation, and products printed by using the material do not warp and have a smooth surface.

The invention relates to a manufacturing method of a modified bamboo powder-based PC / ABS (Poly carbonate / Acrylonitrile Butadiene Styrene) alloy in the field of high polymer materials. The manufacturing method comprises the following steps: carrying out blending and internal mixing on bamboo powder, ABS-g-MAH (Maleic Anhydride), a fiber pre-dispersing agent and a coupling agent to obtain an ABS-g-MAH-g-bamboo powder composite; blending the ABS-g-MAH-g-bamboo powder composite, PC-g-EVA (Ethylene Vinyl Acetate) and PEW (polyethylene wax)-g-MAH at high speed and carrying out melt blending to obtain the modified bamboo powder-based PC / ABS alloy. The alloy material manufactured by the method disclosed by the invention not only has superhigh normal-temperature impact tenacity and low-temperature impact tenacity, but also has low viscosity property, is easy for molding processing of larger products, and has relatively high tensile strength, relatively low cost and an environment-friendly effect as well as a wide market value.

The invention relates to a method for preparing a high-toughness heat-conducting functional composite material. This method is based on the basic principle of core-shell structure toughening, and the heat-conducting filler is designed as the core, and the elastomer is designed as the shell, so as to achieve high filling and give full play to the toughening effect of the elastomer. The specific implementation method is to firstly prepare heat-conducting composite material master batches from heat-conducting fillers, elastomer compatibilizers, and processing aids, and then melt and blend them with a certain proportion of engineering plastics. The high-toughness and heat-conducting functional composite material prepared by the method of the present invention has functions such as high toughness, high thermal conductivity and good processing fluidity, and can be applied to molding processes such as extrusion and injection. It has good application prospects, and its production process is simple and easy to operate. The control is convenient, the quality is stable, the production efficiency is high, and it has broad industrialization and market prospects.

The invention relates to a PPR (polypropylene random copolymer) pipe with copper texture. The PPR pipe comprises, by weight, 100 parts of PPR, 15-30 parts of granular copper powder, 1-5 parts of flakycopper powder, 10-15 parts of dispersing agents, 8-18 parts of carbon fibers, 1-3 parts of coupling agents, 5-15 parts of soft-core hard-shelled core shell copolymer toughening agents and 1.3-3 partsof antioxidants. The PPR pipe has good copper texture and is good in low-temperature toughness, free from embrittlement and good in heat resistance.

The invention discloses a method for preparing a polylactic acid, bamboo nano-cellulose whisker and ultrafine bamboo charcoal composite material film. The method comprises the following steps: (1) performing surface modification treatment on bamboo nano-cellulose whiskers to obtain modified bamboo nano-cellulose whiskers; (2) performing surface modification treatment on ultrafine bamboo charcoal particles to obtain modified ultrafine bamboo charcoal particles; (3) conducting a solution pouring-solvent evaporation method: adding an organic solvent into polylactic acid, heating and stirring till polylactic acid is completely dissolved, then adding the modified bamboo nano-cellulose whiskers and the modified ultrafine bamboo charcoal particles, performing dispersion treatment to obtain a blend system, pouring the blend system in a die to manufacture a film, and drying to obtain the polylactic acid, bamboo nano-cellulose whisker and ultrafine bamboo charcoal composite material film. The method provided by the invention can endow a composite material with favorable tensile strength and tensile modulus of elasticity while toughening the polylactic acid composite material.

The invention relates to a high-toughness matte modified polylactic acid material for 3D printing and a preparation method of the high-toughness matte modified polylactic acid material. The modified polylactic acid material is prepared from, by weight, 100 parts of polylactic acid, 10-15 parts of a main toughening agent, 5-8 parts of an auxiliary toughening agent, 20-40 parts of filler, 3-6 partsof silicon dioxide matting powder, 0.1-0.5 part of a titanate coupling agent, 0.1-0.6 part of an antioxidant, 0.1-0.6 part of a light stabilizer and 0.2-0.5 part of a lubricant, wherein the main toughening agent is a soft-core hard-shell type core-shell copolymer with methyl methacrylate as a shell, the auxiliary toughening agent refers to an elastomer toughening agent containing anhydride or epoxy group, and the filler refers to barium sulfate powder or calcium carbonate powder. The high-toughness matte modified polylactic acid material for 3D printing is excellent in toughness, remarkable inaging resistance and great in matte surface effect.