104results about How to "Improved post-processing performance" patented technology

The invention discloses an emulsion type carbon fiber sizing agent, which comprises main size, an emulsifier, an aid and deionized water. The aid comprises a diluent and a penetrant, wherein the emulsifier is 5 to 15 mass percent of the main size, the diluent is 0 to 120 mass percent of the main size, the penetrant is 1 to 5 mass percent of the main size, and the mass ratio of the deionized water to the main size is 50-90:10-50. The invention also discloses a preparation method and application of the sizing agent. The sizing agent is suitable for unsaturated polyester resin and solves the problem of poor adhesion of the unsaturated polyester resin and the carbon fiber. After the sizing agent is used for sizing, the wear resistance of the carbon fiber is improved, and the broken filament amount is reduced, the post-processing performance of the fiber is improved, the interface adhesion of the carbon fiber and matrix resin is better, the shear strength between layers is improved, and the performance of composite materials is also improved.

The invention relates to a novel preparation technology of polyoxymethylene fiber, in particular to the novel preparation technology of the polyoxymethylene fiber via multi-stage slow cooling and three-stage drawing with different media, which comprises the following steps: vacuum-drying polyoxymethylene granular materials, heating and melting via a screw extruder, melting and extruding by a spinneret, leading small melt flow to pass through the multi-stage slow cooling, carrying out high-speed traction, passing through a moistening and oiling cluster, winding, then obtaining as-spun fiber, carrying out hot air drawing and two times of drawing with different types of solvent, then carrying out hot molding and finally preparing the polyoxymethylene fiber. The novel prepration technology can solve the problems of matching between the multiple sections of atmosphere and temperature and the spinning process control and the control of the drawing with multiple media and make up for the deficiencies that the single atmosphere and temperature and the single medium drawing of the prior art lead the structure to be difficult to stable and uniform.

The invention discloses a carbon fiber emulsion sizing agent. The sizing agent comprises a main sizing agent, an auxiliary agent, an organic solvent and de-ionized water, wherein the auxiliary agent accounts for 5 to 15 percent of the mass of the main sizing agent; the mass ratio of the organic solvent to the main sizing agent is 20-50 to 50-80; and the mass ratio of the de-ionized water to the main sizing agent is 50-90 to 10-50. The invention also discloses a preparation method and application of the sizing agent. The sizing agent has low cost and environment friendliness and can be applied to different types of resin matrixes by varying the ratio of the components in the sizing agent. The preparation method is simple to operate and easy to implement. The sizing agent can improve the processability of the carbon fiber and the mechanical property of carbon fiber-enhanced resin-based composite materials when used in carbon fiber.

The invention discloses a carbon fiber water-soluble epoxy resin sizing agent and a preparation method thereof. The sizing agent comprises main slurry and deionized water as main components, wherein the mass ratio of the main slurry to the deionized water is (50-80):(20-50); and the main slurry consists of modified phenol-formaldehyde epoxy resin and allyl polyoxylethylene ether (AEPH), and the mass ratio of the modified phenol-formaldehyde epoxy resin to AEPH is (60-90):(10-40). The preparation method of the sizing agent comprises the following steps: firstly reacting phenol-formaldehyde epoxy resin with diethanolamine to obtain water-soluble phenol-formaldehyde epoxy resin; and then mixing the water-soluble resin with AEPH in proportion, and performing dilution to reach a certain concentration by using the deionized water to obtain the sizing agent. The sizing agent disclosed by the invention is good in stability and low in cost, cannot cause environmental pollution, and is simple in preparation method; good post-processing performance of carbon fibers can be provided by adding flexible molecular AEPH; experiments show that after the carbon fibers are coated with a proper amount of the sizing agent, the post-processing performance can be significantly improved; and the performance of a carbon fiber epoxy resin composite material can be improved.

The method relates to a method for producing bright polyester staple fibers, belonging to the chemical fiber production technical field. The invention is characterized in that: the method prepares the bright polyester staple fibers through addition of permanent white additives on a certain position of a polycondensation device for polyreaction and utilization of a specially designed spinneret plate and the specially optimized circular-blow wind cooling technique. Because the added permanent white during the process of polycondensation, the method can make the fibers reach the effect of brightness when no TiO2 is added and simultaneously improve the postprocessing properties of the bright staple fibers; the spinneret plate special for spinning the bright staple fibers and circular-blow non-woven fabric reselection are designed, thereby the method reduces the frequency for repairing the spinneret plate, improves the uniformity of bright protofilaments, optimizes various parameters of circular-blow wind, effectively improves the tensile property of the bright protofilaments and not only meets the requirements of high mightiness of the bright staple fibers on high draw ratio of postprocessing but also guarantees high running rate of a postprocessing device.

The invention discloses a polyester staple fiber two-component composite oil agent and a method for preparing the same. The oil agent is formed by combining a smoothing oil agent No. 4 and an antistatic oil agent No. 2. The components by weight percentage of the smoothing oil agent No. 4 are: 10-20 percent of smoothing agent, 20-25 percent of emulsifier, 1-3 percent of penetrating agent and the balance being water. The components by weight percentage of the antistatic oil agent No. 2 are 24-27 percent of natural fatty alcohol, 6.0-6.5 percent of phosphorus pentoxide, 8-10 percent of potassium hydroxide and the balance being water. The preparation method comprises the following steps of preparing the smoothing oil agent No. 4 in a reaction kettle and preparing the antistatic oil agent No. 2 in an esterification reactor and a neutralization reactor. The oil agent has the advantages of low production cost, good stability, high oil film strength, good gliding property and excellently antistatic property and bundle collection property.

The invention discloses a preparation method for a resin/ cement composite light weight board. The resin/ cement composite light weight board is processed and prepared by adopting compound resin, a water-based curing agent, alkali-proof glass staple fibers, a foaming agent, coal ash, calcium hydroxide powder, low-alkaline sulphate aluminium cement, a chemical additive and water in accordance with certain weight proportion. The chemical additive is prepared by adopting the following raw materials in accordance with certain weight proportion: carboxy methyl starch, polyacrylic acid, Alpha-cellulose, lignose, boric acid, calcium sulfonate and calcium chloride. Compared with traditional boards, the resin/cement composite forming board prepared by the preparation method has the advantages that the intensity and toughness are high, the hanging force is strong, the durability is good and the like; moreover, the resin/cement composite light weight board has the characteristics that the heat insulation, sound-proof and damp-proof performances, fire resistance, high durability, light weight, shock resistance are achieved, the manufacture process is simple, the construction is convenient and the like, and the resin/cement composite light weight board is an ideal environment-friendly wall body material.

The invention discloses a cold-resistant acrylate rubber as well as preparation and application thereof. As the total weight of acrylate monomer and vulcanization point monomer is 100%, the cold-resistant acrylate rubber comprises the following raw materials in percentage by weight: 0-30% of methyl acrylate, 20-50% of ethyl acrylate, 30-60% of butyl acrylate, 8-30% of methoxyl ethyl acrylate, 1-5% of vulcanization point monomer, 0.0001-1% of initiator, 1-10% of emulsifying agent and 2-40% of flocculant. The cold-resistant acrylate rubber is prepared by using an emulsion polymerization method, and can be used for automobiles, motorcycles, transformers, rubber tubes and the like.

The invention provides durable carbon black conductive complex fiber and a manufacturing method thereof. The complex fiber comprises a functional layer and a protective layer, wherein in a circle O2 of the cross section of the complex fiber, the functional layer comprises a part surrounded by three equilong circular arcs L1, L2 and L3 and the periphery of the circle O2; the three equilong circular arcs respectively pass through three equidistant points on a concentric circle O1 of which the radius is smaller than that of the circle O2; and the three equilong circular arcs are non-intersected mutually. The preparation method of the conductive fiber comprises the following steps: evenly mixing conductive carbon black and an additive; then adding fiber-forming high polymer to prepare conductive master batch; and after drying the master batch, preparing the conductive complex fiber from the master batch and the fiber-forming high polymer by a spinning and drafting one step method. Due to the cross-section structure with the special design of the conductive complex fiber, the carbon black in the fiber can not peel off easily, so that the durability is improved. Simultaneously, the mechanical properties of the fiber are improved, and the surface friction coefficient of the fiber is reduced, thereby improving the post processing performance and being more favorable for use for customers.

The invention relates to the technical field of chemical fiber processing and particularly relates to a method for preparing fine denier strong viscose fibers. The method comprises the following steps: mixing softwood dissolving pulp and broadleaf wood dissolving pulp according to a certain ratio, dipping, squeezing and grinding to obtain alkali cellulose, and performing oxidative degradation andyellowing on the alkali cellulose to obtain a cellulose sulfonate solution; adding a small amount of a denaturing agent into the cellulose sulfonate solution, filtering, defoaming and curing to obtaina viscose stock solution containing the denaturing agent; spinning by adopting a two bath process, and performing special after-treatment on the formed viscose fibers, so as to obtain the fine denierstrong viscose fibers with low defect content. The preparation method is simple, the cost is low, the prepared fine denier strong viscose fibers are extremely low in defect content and extremely lowin residual sulfur content and can be applied to the field of textile and garment, and the used raw material pulp totally comes from raw woods and has the environmental-friendly characteristics of being natural, safe and recyclable.

The invention discloses a tile with high whole body whiteness. The tile is prepared from the following main raw materials in percentage by weight: 15 to 30% of feldspar, 20 to 35% of quartzite, 10 to 35% of white sandstone, 13 to 25% of kaolin and 2 to 5% of clay. The main raw materials comprise the following chemical components in percentage by mass: 52.03 to 72.52% of SiO2, 3.55 to 15.25% of Al2O3, 1.50 to 3.50% of Fe2O3, 0.12 to 1.98% of TiO2, 3.05 to 9.50% of CaO, 1.15 to 6.50% of MgO, 0.07 to 4.34% of K2O and 0.16 to 7.1% of Na2O. A preparation method of the tile comprises the following steps: purchasing the raw materials, selecting the raw materials, making a formula, ball milling ingredients, preparing slurry, ageing the slurry, sieving and removing iron, spray drying, preparing powder, ageing the powder, distributing the powder, arranging a material, pressing and forming, drying, firing, edging, classifying, packing and putting products in a storehouse. The tile with the high whole body whiteness adopts the northern local raw materials, is smooth in texture, high in whole body whiteness, low in radioactivity and long in service life, and is energy-saving and environmentally-friendly.

The present invention relates to a method for preparing medicine mixture containing amoxicillin sodium and potassium clavulunate. Said method includes the following processes: (a), dissolving two medicine active components in solvent according to a certain ratio so as to form a solution; (b), mixing said solution with supercritical fluid; and (c), separating out medicine micropowder from supercritical fluid. Said medicine granules have good fluidity.

The invention discloses a thermoplastic emulsion sizing agent for carbon fiber. The thermoplastic emulsion sizing agent comprises main pulp, an emulsifying agent, an organic solvent and deionized water. The main pulp is Acrylonitrile-Butadiene-Styrene (ABS) formed by modifying N-Phenylmaleimide-Styrene-Maleic anhydride (NSM). And the mass ratio of the ABS and the NSM is 50-100:0-50. The mass of the emulsifying agent accounts for 10-40% the mass of the main pulp, the mass of the main pulp accounts for 0.5-1.5% the mass of the organic solvent, and the mass of the main pulp accounts for 0.5-1% the mass of the deionized water. The invention further discloses the preparation method of the sizing agent and the application of the sizing agent. The sizing agent is good in stability, low in environmental pollution and simple in preparation method. The NSM can assist a carbon fiber rubber layer generated after sizing is conducted in keeping better completeness in the composite material hot press molding process. It is tested by experiment that the post-processability of the carbon fiber is obviously improved after the carbon fiber is processed through the sizing agent, and the inter-laminar shear strength (ILSS) of the carbon fiber reinforced ABS composite material is obviously improved as well.

The invention relates to 99%-above alumina granulating powder and a preparation method thereof. The 99%-above alumina granulating powder comprises the following components in parts by weight: 100-200 parts of high-aluminum alumina balls, 50-150 parts of a calcined material CT-3000SG, 1-5 parts of a binder, 0.1-1 part of a dispersant, 0.1-1 part of a demolding agent, 0.1-1 part of yttria, 0.1-1 part of magnesia and 50-150 parts of deionized water. The preparation method comprises the following steps: carrying out ball milling, sieving after pulp is obtained, stirring, and processing with magnets; carrying out centrifugal spraying granulation; removing coarse and fine particles from granulated powder by virtue of a sieve, then removing iron and impurities, and finally homogenizing. The granulating powder is low in water content and high in apparent density; after blank molding, a green body is high in density, good in stability and tenacity and excellent in post-machining performance and does not easily collapse from corners; the preparation method is simple in process and low in cost and has good application prospect.

The invention relates to a heat-resistant acrylic ester rubber which is made by copolymerization of methyl acrylate, ethyl acrylate, vinyl monochloroacetate and regulating agent. Calculating by mass percentage, the detailed mixture ratio is: methyl acrylate, 5-40%; ethyl acrylate, 50-94%; vinyl monochloroacetate, 1-10%; and regulating agent, 0.0001-1%; batch process emulsion polymerization technique is used in the process of synthesis; the initiation temperature in the process of polymerization is 10-50 DEG C and the condensation temperature is 40-70 DEG C. The invention has very excellent physical and mechanical properties and post-processing property, thus meeting requirements of the motorcycles and oil-resistant and heat-resistant rubber tubes on material, the formed product of the invention has the advantages of excellent heat-resistance and oil resistance and high tensile-strength, the application of the product ranges from leakproof material of motorcycles, oil-resistant and heat-resistant tubes to protecting jackets and the like.

A process for preparing lactic acid-rubber copolymer includes such steps as dewatering lactic acid, polycondensating, modifying its terminal radical to obtain hydroxy terminated polylactic acid, copolymerizing reaction on the isocyanate terminated rubber, and extending chain. Its advantage is easy control to the mechanical performance and biodegradation of product.