250results about How to "Low molding temperature" patented technology

The invention discloses a high strength glass fiber composition which comprises the components with the weight percentage: 58-65% of SiO2, 14-20% of Al2O3, 15-25% of CaO+MgO, 0.05-1% of K2O+Na2O, 0.05-1% of Fe2O3 and 0.1-2% of CeO2; wherein, the proportional relation of the components is that CaO/MgO is more than 0.7 and less than 2.2. By preference and combination of the components, the high strength glass fiber composition not only can fully utilize rich raw mineral materials of China, but also can reduce mold temperature, liquidus temperature and clarification temperature and has lower total cost and easy large scale commercial process under the premise of ensuring the high strength of glass fiber.

A preparation method of a magnesium alloy variable-section cylindrical member by composite extrusion deformation is characterized in that the method comprises the following steps: firstly, orderly performing homogenization pretreatment and hot extrusion deformation of an AZ80 magnesium alloy blank; preparing a variable-section cylindrical force-bearing member by forward and backward composite extrusion; finally performing turning and heat treatment to obtain a magnesium alloy variable-section cylindrical member. Compared with the prior art, the invention has the following advantages that the invention can prepare large-size cylindrical members; the material grain is fine; the mechanical properties are high; and the procedures are simple.

The invention relates to a method for preparing opening micropore plastic material though slack-melting, extruding and molding. The method includes the processes: after reaching from a feeding device arranged on a double piston extruder to a heating material cylinder, preheating plastic powder with particle size of 40-1500 meshes is extruded by the piston driven by a hydraulic driver and compacted, transported and heated constantly; when the surface temperature of the plastic powder reaches the melt temperature of Tf plus or minus 20 DGE C, the power is extruded from a machine head and a die. Then, extruding matters are cooled and set by a cooling-traction device and the products are finished. By regulating the particle size of the powder, addictive and forming process conditions and so on, the invention can control opening rate, size and distribution of the aperture; the invention has simple process, short production cycle, low forming temperature and pressure as well as short forming time; besides, the invention can greatly reduce the production cost can not be degraded easily when the plastic is processed and can be widely applicable to molding of the opening micropore products of thermoplastic powders, thermosetting power and so on.

A SMC sheet with high surface quality and luster is composed of both surficial PE films and a core material prepared from glass fibers through immersing them in the resin paste which is proportionally from unsaturated polyester resin, low-shrinkage additive, internal demoulding agent, calcium carbonate, styrene, trigger and magnesium oxide.

The invention relates to a multilayered structural polymer-based dielectric composite material and a preparation method thereof, which belong to the field of dielectric substance. The traditional polymer-based dielectric composite material can not take both dielectric constant and adhesive property into account and has complicated preparation process. The composite material provided by the invention comprises three layers of films which are superimposed together; the volume part of a polymer in an outer-layer film is 90 percent, and the volume part of inorganic ceramic particles is 10 percent; and the volume part of the polymer in a middle-layer film is 50 to 80 percent, and the volume part of the inorganic ceramic particles is 20 to 50 percent. In the invention, after the outer-layer film and the middle-layer film are respectively prepared by using the polymer as a basal body and the inorganic ceramic particles as a disperse phase and adopting a spin coating technology, the outer-layer film and the middle-layer film are combined together by adopting a hot pressing process to obtain the multilayered structural polymer-based dielectric composite material. The composite material provided by the invention has the advantages of high dielectric constant, good adhesive property, simple preparation process and the like.

The invention discloses modified polyphenylene sulfide resin suitable for 3D printing. The modified polyphenylene sulfide resin is a combination of the following components in parts by weight: 65-85 parts of polyphenylene sulfide resin, 0.05-0.6 part of a chain extender, 0.5-1 part of an end capping agent, 0.1-0.7 part of a crosslinking agent, 3-20 parts of low-molecular-weight polymer, 2-10 parts of a toughening agent, 1-5 parts of a reinforcing agent, 1-6 parts of a lubricating agent and 0.1-0.7 part of a heat stabilizer. The polyphenylene sulfide resin is modified by adopting the simple processes of mixing materials and extruding, and the processing temperature of the modified polyphenylene sulfide resin is reduced greatly. The melting temperature of the device formed by printing by adopting the modified polyphenylene sulfide resin is not reduced significantly, and the toughness is improved, and thus the polyphenylene sulfide resin can be widely applied to the field of 3D printing.

The invention relates to a low temperature and low pressure BMC (Bulk Molding Compound) material. The low temperature and low pressure BMC material comprises unsaturation resin, a low shrinkage additive, a filler, a curing agent, a mold release agent, a polymerization inhibitor, an auxiliary and glass fiber, wherein the mold release agent is a mixture of zinc stearate and calcium stearate. The molding temperature of the low temperature and low pressure BMC material provided by the invention is only 110-130 DEG C and is reduced by about 30% when compared with the molding temperature of the traditional BMC molding material; and the molding pressure of the low temperature and low pressure BMC material provided by the invention is only 70-100 kg/cm2 and is reduced by about 50% when compared with the molding pressure of the traditional BMC molding material.

The present invention relates to a Li₂O-Al₂O₃-SiO₂ system ultra-low expansion coefficient high-transparency glass-ceramic and production method of the products. Calculated by weight percentage, the ultra-low expansion coefficient high-transparency glass-ceramic is composed of 3.2 to 4.6 percent of Li₂O, 18.0 to 23.6 percent of Al₂O₃, 64.1 to 69.4 percent of SiO₂, 0.3 to 0.8 percent of MgO, 0.8 to 2.5 percent of BaO, 0.3 to 0.8 percent of R₂O, 0.01 to 0.4 percent of Y₂O₃, 1.8 to 2.5 percent of TiO₂, 1.6 to 2.4 percent of ZrO₂, 1.1 to 1.8 percent of P₂O₅, 0.6 to 1.5 percent of Sb₂O₃, 0.3 to 1.0 percent of NaCl and 1.0 to 2.0 percent of NH₄NO₃. The heat-resistant glass plates and heat-resistant glass products can be manufactured by using the formula and the corresponding forming die. The present invention has the advantages that the production technique is simple, the produced products have low expansion coefficient, good transparency, high thermal impact temperature, high strength, have constant transparency when being used under the temperature of 700 Celsius system for a long time, the products have long service life, etc.

The invention provides an antiseptic powder coating which comprises the following components by weight percent: 30-60% of bisphenol A-epoxy resin matrix, 10-20% of polyester resin, 20-40% of filler, 1-10% of additive, 0.2-2% of carbon powder and 1-9% of metal powder, wherein the metal powder is zinc powder, aluminum powder or zinc aluminum powder. The invention further provides a manufacturing method and an applying method of the antiseptic powder coating. Bisphenol A-epoxy resin is adopted as a matrix in the antiseptic powder coating, thereby being characterized by no toxicity, abrasion resistance and the like through polyester resin curing and realizing strong adhesive to metal. The carbon powder can improve the temperature resistant performance of the coating, and the metal power containing zinc/aluminum powder can play the roles of seawater resistance and salt fog resistance. The antiseptic powder coating has the advantages of easy obtainment of preparation raw materials and low manufacturing cost, when in application, the antiseptic powder coating is directly sprayed on the surface of an object at one time, and the coating is thicker, thereby simplifying the construction process, reducing the construction cost, and having broad application prospects.

The invention relates to a straw briquetting machine. The straw briquetting machine comprises a ring die (1), a base (2), a pressing roller (3), an eccentric shaft (4), a pressure cover (5), a main shaft (6), an abrasive disk (8) and an upper pressure plate (13), wherein the central hole of the base (2) is provided with a central main shaft (6); the straw briquetting machine is characterized in that the main shaft (6) drives the abrasive disk (8) to rotate; the abrasive disk (8) drives the eccentric shaft (4) to rotate; and the pressing roller (3) rotates around the main shaft (6) on the eccentric shaft (4). Straw fed from a feeding port (14) of the ring die (1) is continuously compressed in the space of an abrasive cavity and extruded from a discharge port (15) to prepare finished products, and the straw briquettes are formed. By adopting the straw briquetting machine, the production efficiency of the straw briquette is improved, the power consumption is reduced, the production cost is lowered; and a roller is connected with the abrasive disk through the eccentric shaft, so that the gap between the roller and an extrusion die can be adjusted, the production efficiency is improved, the service lives of the extrusion die and the roller are prolonged, and the safety is enhanced.

The invention relates to a method for improving thermoplastics forming manufacturability and property, in particular to that: a relatively small amount of light-cured crosslinking monomers, oligomers, photoinitiators and photosensitizers are utilized for being blended with a large amount of thermoplastics so as to lower the viscosity of a bending system to improve the forming manufacturability and the property of the thermoplastics and the composite materials; the thermoplastics and the composite materials are made by the following raw materials calculated by weight portion: thermoplastics: 60 to 95 portions; light-cured crosslinking monomers which are acrylic monomers: 5 to 20 portions; oligomers which are epoxy oligomers: 5 to 20 portions; photoinitiators: 1 to 4 portions and photosensitizers: 0.5 to 2 portions. The method for improving thermoplastics forming manufacturability and property can improve and increase the property of the thermoplastics and the composite materials, and the technology can lead the thermoplastics and the rotational mode products, composite materials products, powder coating and injection and extrusion products to have key breakthrough in property and application, which can promote the development of new composite materials.

The invention discloses a SiCN aerogel. The raw materials comprise polyvinyl silazane containing -CH=CH2 bond or also containing both -Si-H bond in the molecular structure, and divinylbenzene / dicumyl peroxide. A polymer precursor conversion ceramic preparation method and an aerogel preparation method are conduced to prepare the SiCN aerogel with specific surface area of 100-200 m<2>/g, porosity of 80-90% and density of 0.05-0.15 g/mL. The SiCN aerogel of the invention is a novel nano-porous ceramic material with extremely high porosity and specific surface area, and low density.

Improved polypropylene resin foamed beads that without detriment to the excellence in properties, such as compression properties and heat resistance, characterizing the polypropylene resin foamed beads, can provide a polypropylene resin foamed bead molded article with equal properties by an molding conducted at low heating temperature. There are disclosed polypropylene resin foamed beads composed of a polypropylene resin of 115 to 135° C. melting point and 500 MPa or higher Olsen flexural modulus. The amount of ash at the surface of the foamed beads is 3000 wt. ppm or less (including 0). With respect to the foamed beads, in the first DSC curve obtained by heating 1 to 3 mg of polypropylene resin foamed beads from room temperature to 200° C. at a temperature elevation rate of 10° C./min by the use of a differential scanning calorimeter, there appear not only one or more endothermic peak (Pa) having the peak temperature within a temperature zone not higher than the melting point of the resin but also one or more endothermic peak (Pb) having the peak temperature within a temperature zone exceeding the melting point of the resin and not lower than 130° C. The total calorific value of the endothermic peak (Pb) is in the range of 2 to 12 J/g. Further, there is disclosed a foamed bead molded article obtained by molding the above foamed beads.

The invention provides a method for producing black transparent microcrystal glass and its products, wherein the base glass comprises Li2O, RO, Al2O3 and SiO2, the coloring agent comprises NiO, V2O5 and Fe2O3, the crystal nucleus agent comprises TiO2, Zr2O5 and P2O5, the weight percentage of each component being, Li2O: 2.5-4.7%, RO: 2-3%, Al2O3: 17-26%, SiO2: 62-72%, NiO: 0.05-0.1%, V2O5: 0.1-0.2%, Fe2O3: 0.05-0.1%, TiO2: 2-2.5%, ZrO2: 1.5-2.5%, P2O5: 1-2%. The formulation and related die arrangement can be used for making electromagnetic oven plate, disc, microwave oven disc, roasting and grilling plate, baking oven cloche, frying pan and various pots.

The invention provides a preparation method for adjusting and controlling a high-toughness magnesium alloy containing a fine LPSO structure through spark plasma sintering. The preparation method comprises the following steps: A, Mg-RE-Zn-Zr/Mn alloy powder is prepared through atomizing powder; B, the Mg-RE-Zn-Zr/Mn alloy powder is subject to the spark plasma sintering to obtain the high-toughnessmagnesium alloy with the fine LPSO structure; and C, aging treatment is carried out on the magnesium alloy prepared in the step B. According to the preparation method, the pressure, temperature, timeand heating rate of the spark plasma sintering are regulated and controlled, the tissue of the alloy is regulated and controlled, and compared with an existing magnesium alloy forming mode, the forming temperature of the method is low, the forming speed is high, the tissue of products can be regulated and controlled, the crystal grain is small, the LPSO structure is fine, and therefore the mechanical property is improved.

The invention provides heat-resistant borosilicate flat glass and belongs to the technical field of fireproof glass. The heat-resistant borosilicate flat glass is prepared from, by weight, 78.1-82% of SiO2, 1-5% of Al2O3, 9-14% of B2O3, 3-6% of Na2O, 1-5% of CaO, 0.5-2% of K2O, 0.1-3% of ZrO2 and 0.01-2% of GeO2, wherein the total content of SiO2 and B2O3 accounts for 87.1-92% of the total content of all the materials, and the weight ratio of SiO2 to B2O3 is 5.5 to 8.6. The invention further provides a preparation method of the heat-resistant borosilicate flat glass; compared with current borosilicate flat glass in the market, the heat-resistant borosilicate flat glass has a higher glass softening point and a lower linear expansion coefficient, at the same time, the melting temperature and the molding temperature are relatively low; the glass is easy to manufacture and can serve as the fireproof glass applied in the fire protection field after being tempered.

The present invention relates to an optical glass containing, in terms of mass % on the basis of oxides, B₂O₃: 10 to 20%, SiO₂: 0.5 to 12%, ZnO: 5 to 19%, Ta₂O₅: 2.5 to 17%, Li₂O: 0.2 to 3%, ZrO₂: 0.6 to 4.9%, WO₃: 1 to 20%, La₂O₃: 25 to 50%, Gd₂O₃: 0 to 13%, and Y₂O₃: 0.2 to 20%, provided that La₂O₃+Gd₂O₃+Y₂O₃ is 35 to 60%, in which the optical glass does not substantially contain Nb₂O₅, and has a refractive index (n_d) of 1.82 to 1.86, an Abbe's number (ν_d) of 37 to 44 and a glass transition point (T_g) of 630° C. or lower.

The present invention provides a glass fiber composition, a glass fiber and a composite material therefrom. The glass fiber composition comprises the following components expressed as percentage by weight: 58-64% SiO2, 14-19% Al203, ≧8.8% and <11.8% CaO, 7.5-11% MgO, 0.2-2.7% SrO, 0.1-2% Na2O+K2O, 0.05-0.9% Li2O, 0.05-1% Fe2O3, 0.05-1.1% TiO2 and <0.5% F2, wherein the range of the weight percentage ratio C1=(MgO+SrO)/CaO is 0.75-1.1, and the range of the weight percentage ratio C2=CaO/MgO is less than 1.4. Said composition can effectively inhibit the crystallization tendency of glass, significantly decrease the liquidus temperature and crystallization degree of glass and also has an outstanding glass refractive index and outstanding modulus.