487 results about "Powder talc" patented technology

The invention discloses a biodegradable polylactic acid composite material and a preparation method thereof, and relates to the technical field of polylactic acid materials. The method comprises the steps that firstly, chitosan activated through hydrochloric acid is subjected to graft modification through a KH550 silane coupling agent, meanwhile, nano-zinc oxide is subjected to surface modification through stearic acid, the chitosan and the nano-zinc oxide are mixed, spray drying is conducted, and antibacterial composite powder is prepared; the preparation method comprises the following steps: performing hydrochloric acid activation and KH570 silane coupling agent modification on nano silicon dioxide, performing hydroxypropylation modification on alkali lignin, and performing reflux crosslinking reaction on the modified alkali lignin, KH570 modified nano silicon dioxide, polycaprolactone, methyl methacrylate and azodiisobutyronitrile to prepare a heat-resistant reinforcer; uniformly mixing polylactic acid, poly (butylene succinate), the antibacterial composite powder, the heat-resistant reinforcer, tributyl citrate, polyethylene glycol and talcum powder, and extruding and granulating by using a twin-screw extruder to obtain the heat-resistant antibacterial material. The composite material prepared by the invention has excellent antibacterial property, heat resistance and biodegradability.

The invention discloses a preparation method of a rubber waterstop material with a low compression set rate, which comprises the following steps: firstly, carrying out blending reaction on hydroxyl silicone oil and boric acid to obtain liquid polyborosiloxane; the preparation method comprises the following steps: adding liquid polyborosiloxane and natural rubber into an internal mixer according to a ratio, and carrying out internal mixing to obtain a mixture; adding zinc oxide, an anti-aging agent, stearic acid and an anti-tearing agent into the obtained mixture, and continuously mixing; continuously adding kaolin talcum powder, calcium carbonate, calcium oxide, white carbon black, N550, N330 and KH550, and internally mixing again to obtain a preform; adding a vulcanization accelerator and a vulcanizing agent into the preform, and continuously mixing to obtain a rubber material to be vulcanized; and vulcanizing and forming the rubber material to be vulcanized to prepare the rubber water-stop belt material with the low compression set rate. According to the invention, the compression set rate of the rubber material can be reduced while the tensile strength, elongation, tear resistance and other properties of the rubber are not sacrificed, so that the product performance is enhanced.

The invention discloses a polypropylene composite material as well as a preparation method and application thereof. The polypropylene composite material comprises the following components in parts by weight: 50-80 parts of polypropylene resin; 4-10 parts of high density polyethylene; 5-15 parts of a polyolefin elastomer; 10 to 20 parts of talcum powder; 1 to 4 parts of polypropylene grafted polysiloxane; and 0.05 to 0.3 part of a beta crystal form nucleating agent. According to the polypropylene composite material disclosed by the invention, polypropylene is grafted with high-molecular-weight polysiloxane, and a specific nucleating agent is added, so that the crystal form of polypropylene is optimized, a more uniform microstructure is formed, a large spherocrystal boundary is reduced, a more uniform dispersion environment is provided for silicone molecules, local enrichment is avoided, and the mechanical property of the polypropylene composite material is improved. Therefore, the injection molding floating problem is effectively improved, and meanwhile, the high scratch resistance of the material is guaranteed. The high-performance polypropylene composite material which has excellent scratch resistance and good appearance at the same time is realized.

The invention discloses a polypropylene composite material as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The polypropylene composite material is prepared from the following components in parts by weight: 44 to 60 parts of polypropylene resin, 5 to 15 parts of ethylene-vinyl alcohol copolymer, 10 to 25 parts of modified talcum powder and 15 to 25 parts of toughening agent. The polypropylene resin, the ethylene-vinyl alcohol copolymer, the modified talcum powder, the flexibilizer and the antioxidant are compounded, the compatibility of all the components is good, the compounded material has good bonding performance with other plastic materials (such as PMMA), meanwhile, the tensile strength and impact strength of the polypropylene composite material can be effectively improved, and the service life of the polypropylene composite material is prolonged. The requirements of automobile decorative parts on the adhesive property, the rigidity and the toughness can be met.

The invention discloses a high-rigidity and high-toughness polypropylene composite material and a preparation method thereof, the high-rigidity and high-toughness polypropylene composite material comprises 55-70 g of homo-polypropylene, 10-20 g of anti-impact co-polypropylene, 18-25 g of surface modified talcum powder, 3-6 g of chopped glass fiber, 8-12 g of ethylene-octylene copolymer, 3-5 g of maleic anhydride grafted polypropylene, 0.5-1.0 g of polyethylene wax, and 0.3-0.5 g of an antioxidant 1010 and 168 (1: 1) mixture. The invention realizes the following effects: 1, a robust rigid-tough balance design: a reinforcing system with high-content talcum powder as a main body and low-content glass fiber as an auxiliary is adopted to cooperate with a POE (ethylene-octylene copolymer) flexibilizer, so that good low-temperature impact toughness is maintained while the bending modulus stably reaches 2500MPa or above; 2, interface compatibility optimization: the interface combination of the inorganic filler and the matrix is improved through PP-g-MAH, and the dispersity and the mechanical property stability are improved; and 3, process control: through optimized temperature and vacuum degree control, degradation is prevented, good performance reproducibility is ensured, and industrial production is easy.

The invention discloses a polypropylene corrugated pipe composite material and a preparation method of a composite polypropylene corrugated pipe, and the polypropylene corrugated pipe composite material is prepared from the following raw materials in parts by weight: 90-100 parts of polypropylene, 15-20 parts of modified talcum powder, 2-3 parts of a compatilizer, 0.5-1 part of a lubricant and 0.5-0.8 part of an antioxidant. According to the polypropylene corrugated pipe composite material disclosed by the invention, rigid pyromellitic dianhydride and flexible castor oil are sequentially grafted on the surface of talcum powder, so that the obtained modified talcum powder has multiple functions of interface compatibility, heterogeneous nucleation, rigidity enhancement, flexible toughening and the like, and then the modified talcum powder is added into a polypropylene matrix as a functional filler; the polypropylene corrugated pipe composite material has the advantages of high ring stiffness, excellent toughness and impact resistance, simple formula and clear process route, and the prepared corrugated pipe has excellent comprehensive performance and high industrial application value.

The invention relates to the technical field of high polymer material modification, in particular to a top whitening resistant polypropylene composite material as well as a preparation method and application thereof. The top whitening resistant polypropylene composite material is prepared from the following components in parts by weight: 60 to 80 parts of polypropylene resin, 20 to 30 parts of talcum powder, 5 to 15 parts of hydrogenated styrene-butadiene-styrene block copolymer, 0.1 to 0.5 part of beta crystal form nucleating agent, 3 to 8 parts of maleic anhydride grafted polypropylene, 0.3 to 1 part of composite antioxidant and 0.5 to 2 parts of zinc stearate. Through the synergistic effect of the hydrogenated styrene-butadiene-styrene block copolymer toughening system and the beta crystal form nucleating agent in a specific formula, high rigidity (the filling amount of talcum powder reaches 20-30 parts) is kept, and meanwhile, the top whitening resistance of the composite material is remarkably improved; the method is suitable for parts such as automobile dashboards and door plates which have strict requirements on surface quality.

The invention relates to the technical field of sound insulation materials, in particular to a high-performance sound insulation material for buildings and a preparation method thereof, and the high-performance sound insulation material comprises the following raw materials in parts by weight: 60-80 parts of polypropylene, 15-25 parts of filler, 10-20 parts of talcum powder, 5-15 parts of flexibilizer, 0.2-1 part of antioxidant and 0.2-0.4 part of light stabilizer. According to the invention, the SEBS with high damping performance is utilized to provide a main viscoelastic effect, and the density performance of the material can be directly increased by combining the barium sulfate material with high density, so that the low and medium frequency sound insulation function is improved, and the hollow glass beads can utilize the spherical surfaces to cause scattering and refraction of sound waves and disturb the propagation direction of the sound waves in the hollow glass beads; meanwhile, in cooperation with the high radius-thickness ratio state of the mica sheet, sound waves are further dispersed and refracted in combination with the hollow glass beads, the conduction path of the sound waves is prolonged, and therefore the medium-high frequency sound insulation performance is improved, and the sound insulation performance of the material is effectively improved.

The invention provides a functional composite suspended biological carrier and a preparation and application method thereof. The functional composite suspended biological carrier comprises a main base material and functional components, the main body base material is polyethylene or polypropylene, and the functional component comprises the following substances in parts by mass: 3.0 parts of polyquaternium-10 or cationic polyacrylamide, 1.5 parts of molybdenum disulfide, 2.5 parts of vinyl acetate or acrylate, 2.0 parts of nano silicon dioxide, 2-3 parts of talcum powder, 0.5 part of a silane coupling agent and 0.5 part of polyethylene wax; the total proportion of inorganic components in the carrier is less than or equal to 12%; the cross section of the carrier is a 19-hole honeycomb hollow cylinder, the diameter of the formed cylinder is 25 mm, the height of the formed cylinder is 10 mm, and the density of the carrier is 0.95-1.00 g / cm; according to the invention, the state of charge on the surface of the carrier is adjusted through the positive electricity polymer PQAS-10, the affinity with negatively charged microorganisms is enhanced, the biofilm culturing period is obviously shortened, and by introducing molybdenum disulfide and a composite conductive structure thereof, a surface micro-conductive network is established, and the microbial metabolism efficiency under aerobic and facultative conditions is improved.

The invention relates to the technical field of biodegradable high polymer materials, in particular to a tear-resistant high-barrier biodegradable mulching film and a preparation method thereof, and the tear-resistant high-barrier biodegradable mulching film is prepared from the following raw materials in parts by weight: 60-90 parts of poly (butylene adipate-co-terephthalate); 10 to 40 parts of poly (propylene carbonate); 0.5-5 parts of a plasticizer; 0.05 to 0.3 part of a cross-linking agent; 0.1 to 10 parts of talcum powder; 0.1 to 2 parts of a lubricant; 0.1-1 part of an anti-blocking agent; 0.1 to 1 part of an antioxidant; 0.1 to 1 part of an anti-ultraviolet agent; 0.1-1 part of a light stabilizer; 0.1 to 1 part of an anti-hydrolysis agent; 0.1-1 part of a nucleating agent; the plasticizer is poly (1, 2-propylene glycol adipate); and the cross-linking agent is 1, 4-bis (tert-butylperoxy) diisopropyl benzene. The film has good mechanical properties and water vapor transmission amount, can be completely biodegraded, and has good aging resistance.

The invention belongs to the technical field of degradable packaging materials, and discloses a preparation method of a degradable preservative film. The anti-fog antibacterial plastic is prepared from the following raw materials in parts by weight: 40 to 45 parts of poly (butylene adipate-co-terephthalate) (PBAT), 8 to 12 parts of polylactic acid (PLA), 28 to 32 parts of modified structural starch, 4 to 6 parts of poly (butylene carbonate) (PBC), 4 to 6 parts of talcum powder, 0.4 to 0.6 part of aluminate, 0.8 to 1.2 parts of a composite antibacterial agent and 2.5 to 3.5 parts of anti-fog master batch. The invention aims to overcome the defects in the prior art, and provides the degradable preservative film and the preparation method thereof, the preservative film not only has good degradability and mechanical properties, but also has excellent antibacterial and antifogging effects, and the preparation process is simple and easy for industrial production.

The invention belongs to the field of drafting rubber rings for spinning, and particularly provides a rubber ring and a preparation method thereof.The rubber ring is characterized by comprising an inner rubber layer, a reinforcing layer and an outer rubber layer which are sequentially compounded from inside to outside; the outer rubber layer is prepared by mixing the following raw materials in parts by weight: 90-100 parts of rubber, 10-20 parts of phenolic resin, 2-3 parts of an anti-aging agent, 2-3 parts of an accelerant, 5-8 parts of sulfur, 2-3 parts of zinc oxide, 0.5-2 parts of stearic acid, 3-5 parts of talcum powder, 2-5 parts of a modified copolymer and 3-5 parts of lignosulfonate; the modified copolymer is a copolymer of sulphobetaine methacrylate and glycidyl methacrylate; the prepared upper rubber ring outer rubber layer is good in drafting spinning stability, and the problem of sticky spots can be solved.

The invention belongs to the technical field of nano composite materials, and particularly provides a corrosion-resistant flexible carbon nano polymer coating and a preparation method thereof, and the corrosion-resistant flexible carbon nano polymer coating comprises phenolic resin, bisphenol F epoxy resin, GO-NH2, self-repairing polyimide, a BYK-011 defoaming agent, talcum powder, polytetrafluoroethylene, a BYK333 flatting agent, silicon carbide, a B215 composite antioxidant, a UV531 ultraviolet light absorber and cardanol. The corrosion-resistant flexible carbon nano polymer coating prepared by the invention has excellent mechanical strength and wear resistance, good flexibility, efficient self-repairing capability and lasting corrosion resistance, the service life of the coating can be effectively prolonged, and the protection requirement in a severe environment is met.

The invention relates to the technical field of films, in particular to a PFAS-free high-flame-retardant polycarbonate film and a preparation method thereof, and the PFAS-free high-flame-retardant polycarbonate film comprises the following raw materials by mass: 70-85% of PC resin; 0.5-3% of a silicon flame retardant; 4-8% of a phosphorus-based flame retardant; 5-10% of talcum powder; 5-10% of a low-temperature sintering agent; 0.05 to 0.2 percent of an antioxidant 168; 0.05 to 0.2 percent of an antioxidant 1010; 0.1-0.3% of lubricant silicone oil; and 0.05-0.2% of a 70% phosphorous acid solution.

The invention discloses a degradable film blowing material and a processing technology thereof, and relates to the technical field of degradable film blowing materials, the degradable film blowing material comprises the following preparation raw materials by mass: 50-70 parts of modified polylactic acid, 20-50 parts of PBAT resin, 5-20 parts of modified starch, 3-10 parts of nano calcium carbonate, 2-5 parts of talcum powder, 1-5 parts of a dispersant, 1-5 parts of a plasticizer, 0.1-1.0 part of an antioxidant and 0.5-1.5 parts of a lubricant. The processing method comprises the following steps: S1, drying modified polylactic acid and PBAT resin, and plasticizing modified starch; s2, mixing the preparation raw materials of the degradable film blowing material, extruding, and granulating to obtain degradable master batches; and S3, carrying out film blowing molding on the degradable master batch to obtain the degradable film blowing material. The degradable film blowing material is relatively high in tearing strength and notch impact strength, and still keeps a relatively high degradation rate.

The invention relates to the technical field of bio-based degradable high polymer materials, in particular to a bio-based degradable pearl wool microcellular foaming material. The composite material is prepared from the following components in parts by mass: 70-85 parts of a bio-based polyester resin composite system of polylactic acid and poly (terephthalic acid)-butylene adipate (in a mass ratio of 60: 40-75: 25), 10-20 parts of bagasse microfibers modified by a silane coupling agent, 1.5-4 parts of a composite nucleating agent of flaky talcum powder and spherical nano calcium carbonate (in a mass ratio of 1.5: 1-2.5: 1), the bio-based plasticizer is prepared by compounding epoxidized soybean oil and tributyl citrate, the montmorillonite degradation accelerant is loaded with iron and cobalt ions (the molar ratio is 3: 1-5: 1), and the mixed foaming agent is prepared from 5-12 parts of supercritical carbon dioxide and nitrogen (the volume ratio is 60%-85%). A bio-based polyester composite system of polylactic acid and PBAT is adopted, silane modified bagasse microfibers are matched, montmorillonite loaded with iron and cobalt ions serves as a degradation accelerant, a bio-based plasticizer and the like are combined, and the composite material is prepared through a twin-screw extrusion melt blending and supercritical fluid foaming technology.

The invention relates to a talcum powder filled polypropylene composite material based on surface modification and process cooperation and an injection molding pocking mark defect inhibition method. The material is composed of co-polypropylene, acidic salt-titanate composite modified talcum powder, flaky mica (5-10 [mu] m), a POE flexibilizer, a zeolite molecular sieve, an MAH-g-PP compatilizer, a zinc stearate dispersant and the like. According to the invention, the three measures of surface modification treatment, formula design and process purification technology are combined, and the problem of pitting defects (surface pits and white spots) generated in the injection molding process of the talcum powder filled polypropylene composite material is mainly solved. Through filler surface modification treatment, formula design and a process purification technology, the hard spot defect rate is reduced by about 85%, and the method is suitable for products with high surface quality requirements, such as automobile bumpers and instrument panels.

The invention discloses an antibacterial barrier rubber glove material and a preparation method thereof, and relates to the technical field of rubber glove materials. The invention discloses an antibacterial barrier rubber glove material. The rubber comprises the following raw materials in parts by weight: 60-75 parts of natural rubber latex, 25-40 parts of nitrile rubber, 4-7 parts of zinc oxide, 1-4 parts of stearic acid, 0.5-2.5 parts of sulfur, 3-6 parts of modified nano-zinc oxide, 4-7 parts of modified rectorite, 2-5 parts of sodium carboxymethyl cellulose, 3-6 parts of bamboo fibers, 5-8 parts of ethylene-vinyl acetate copolymer, 1-4 parts of ethylene glycol and 5-8 parts of talcum powder. 0.4 to 0.9 part of bis (3-triethoxysilylpropyl) disulfide, and 0.05 to 0.15 part of carbon nanotube. The antibacterial barrier rubber glove material is scientific in raw material ratio, is subjected to special modification treatment, integrates the advantages of nature and nitrile rubber, is outstanding in antibacterial property and barrier property, is standard in preparation process, can guarantee the stable performance of the material, and is suitable for medical scenes and other scenes with high protection requirements.

The invention discloses an antibacterial and wear-resistant functional integrated PP plastic part for an automotive trim and a preparation method of the antibacterial and wear-resistant functional integrated PP plastic part, and belongs to the technical field of automotive trim materials. The plastic part is composed of a modified PP matrix, a coated antibacterial system, a synergistic wear-resistant system and an auxiliary agent, the modified PP matrix is a homopolymerized PP and copolymerized PP blend, the antibacterial system is coated and compounded by nano-silver-zinc and maleic anhydride grafted PP, and the wear-resistant system is formed by synergism of modified talcum powder and polyolefin wax micro-powder. The preparation method comprises the steps of antibacterial agent pretreatment, premixing, blending extrusion and injection molding. The antibacterial rate is larger than or equal to 99%, the 200,000-time friction wear loss is smaller than or equal to 0.04 g, the antibacterial rate after 800-time friction is still larger than or equal to 96%, meanwhile, the notch impact strength is larger than or equal to 12 kJ / m < 2 >, the VOC release amount is smaller than or equal to 0.4 mg / m < 3 >, the problems that an existing PP interior trim part is poor in antibacterial dispersion and unbalanced in wear resistance and toughness are solved, and the PP interior trim part is suitable for high-frequency contact interior trim parts.

The invention relates to the technical field of building materials, and particularly discloses a 3D texture interior wall decorative plate and a preparation method thereof. The 3D texture interior wall decorative plate comprises the following raw materials: cement, gypsum, fly ash, quartz sand, talcum powder, modified polyvinyl alcohol, modified bentonite, hydroxypropyl methyl cellulose and water. The modified polyvinyl alcohol is polyvinyl alcohol grafted and modified by sodium lignin sulfonate; the modified bentonite is obtained by modifying bentonite through stearic acid. The 3D texture interior wall decorative plate has good water resistance and can meet the use requirements of decoration of various interior walls of residences, office buildings and the like.

The invention discloses a long-acting anti-corrosion coating for a heavy corrosion working condition as well as a preparation method and application thereof, and belongs to the technical field of coating preparation. The invention relates to a long-acting anticorrosive paint for heavy corrosion working conditions. The paint is prepared from the following components in parts by weight: 25-39 parts of epoxy resin, 12-22 parts of fluorocarbon resin, 12-21 parts of zinc powder, 5-9 parts of zinc phosphate, 10-18 parts of talcum powder, 2-7 parts of nano silicon dioxide, 1-5 parts of an organic corrosion inhibitor, 0.8-2.3 parts of an adhesion promoter, 1-4 parts of a dispersing agent, 1-3 parts of a flatting agent, 1-3 parts of a defoaming agent and 12-24 parts of ethylene glycol butyl ether. The anticorrosive paint prepared from the substances has excellent long-acting anticorrosive properties such as high temperature resistance, acid and alkali resistance, oxidation resistance and the like, and is suitable for infrastructures in the fields of petroleum, chemical industry, steel manufacturing, port facilities, wind power generation, heavy mechanical equipment, military industry and aerospace.

1. The name of the design product: whiteness tester. 2. The use of the design product: for measuring the whiteness of paper and paperboard, pulp and chemical pulp, cotton and chemical fiber, textiles, plastics, ceramics, porcelain, starch, salt, white cement, porcelain clay, talc, calcium carbonate, nano calcium carbonate and other objects. 3. The design points of the design product: the combination of shape and pattern. 4. The picture or photo that best shows the design points: perspective view.

This application belongs to the field of polymer materials technology, specifically disclosing a modified PC / ABS alloy and its preparation method. By weight, it comprises: polycarbonate: 50-80 parts; ABS resin: 15-40 parts; comb-shaped reactive compatibilizer: 3-8 parts; halogen-free flame retardant: 8-18 parts; nano-talc powder: 3-10 parts; core-shell toughening agent: 2-8 parts; antistatic agent: 0.5-3 parts; antioxidant: 0.2-0.8 parts; lubricant: 0.2-1.0 parts. The tensile strength (56.3-66.8 MPa), flexural strength (88.4-98.5 MPa), flexural modulus (2480-2780 MPa), and notched impact strength (23℃: 52.4-62.5 kJ / m) are also disclosed. 2 -30℃: 28.5~36.2kJ / m 2 Heat distortion temperature (110~125℃), limiting oxygen index (30.0~32.0%), flame retardant rating (V-0), and surface resistivity (5.2×10⁻⁶) are also specified. 9 ~2.5×10 10 In terms of Ω), it is better, and the high performance of PC / ABS alloy is achieved by using reactive compatibilizers, nano talc powder, phosphorus-nitrogen-silicon ternary synergistic flame retardant system, core-shell toughening agent and polymeric antistatic agent.

The application belongs to the technical field of inorganic porcelain composite materials, and particularly relates to an inorganic porcelain composite material for resisting salt and nitrate and preventing moisture and a preparation method thereof. The application comprises the following steps: preparation of activated base powder; and sintering of the activated base powder. The application is prepared by sintering a blank body made of calcium carbonate, talcum powder, silicon nitride, quartz sand and perhydrogen polysilazane. The perhydrogen polysilazane is first decomposed to solidify and shrink the blank body. When the temperature continues to rise, the quartz in the blank body and the silicon dioxide generated by the oxidation of the silicon nitride are both in a molten state and are fused with each other. The oxygen in the air penetrates into the blank body by diffusion and reacts with the silicon nitride. At this time, the nitrogen gas generated by the silicon nitride cannot diffuse outward under the molten blank body formed after solidification and shrinkage, and gradually gathers to cause the expansion of the base and a high closed porosity. The prepared inorganic porcelain composite material has excellent moisture resistance and high resistance to salt and nitrate.

The utility model belongs to the technical field of material mixing, and particularly relates to a superfine talcum powder and polypropylene material mixing device. The device comprises a device body, the device body comprises a machine body support, a material mixing box, a feeding mechanism and a discharging mechanism, the material mixing box is installed above the machine body support, the feeding mechanism is located at the top of the material mixing box, and the discharging mechanism is located on one side of the material mixing box. The material mixing box comprises an outer static box body and an inner movable box body, the inner movable box body is located in the outer static box body, the outer static box body and the inner movable box body are of a cylindrical structure, a stirring motor is installed on one side of the inner movable box body, the output end of the stirring motor is connected with a stirring assembly, and the stirring assembly is connected with a motor. The stirring assembly is movably mounted in the inner movable box body, and a swinging mechanism is mounted at the bottom of the inner movable box body.

This invention provides anhydrous ethyl carboxylate compound-coated taste-masking granules. The anhydrous taste-masking granules comprise ethyl carboxylate compound-coated microcapsules and a flavoring material. The ethyl carboxylate compound-coated microcapsules are formed by sequentially coating a blank core with a drug-loaded layer, an isolation layer, and a taste-masking layer. The drug-loaded layer includes an active pharmaceutical ingredient, a coating material, an anti-adhesion agent, and an antistatic agent. The isolation layer includes a coating material, an anti-adhesion agent, and an antistatic agent. The taste-masking layer includes a coating material, a plasticizer, an anti-adhesion agent, and an antistatic agent. The active pharmaceutical ingredient is an ethyl carboxylate compound or a pharmaceutically acceptable salt thereof. The structure of the ethyl carboxylate compound is shown below. By using a smaller-sized blank core, a specific amount of talc, and Eutec E100 / EPO as the coating material for the taste-masking layer, smaller-sized coated microcapsules with fewer static electricity and adhesion problems, and anhydrous ethyl carboxylate compound-coated taste-masking granules with a better taste, are obtained.

This invention relates to the field of polymer materials technology. It discloses a low-linearity polypropylene-talc composite material, its preparation method, and its applications. The material comprises the following raw materials in weight percentages: polypropylene resin: 50-65%, modified talc: 15-25%, ethylene-octene copolymer resin: 10-15%, modified flat glass fiber: 5-15%, basic magnesium sulfate whiskers: 3-10%, heat stabilizer: 0.3-1%, and antioxidant: 0.1-0.5%. This composite material exhibits advantages such as a low coefficient of linear expansion, excellent surface tension, and superior mechanical properties.

This invention discloses a method for preparing high-elongation bars for cold forging, belonging to the field of aluminum alloy preparation technology. Through optimization of composition and process, the prepared bars possess high purity, uniform and fine equiaxed grain structure, and excellent plasticity, with significantly improved elongation. This meets the stringent requirements of cold forging for high material plasticity, resulting in a bright, crack-free surface and uniform grains after cold forging, overcoming problems such as oxide scale, coarse grains, and poor dimensional accuracy caused by hot forging. Furthermore, the introduction of modified talc and sodium nitrate as refining agents further promotes uniform microstructure, achieving high elongation and excellent cold forging performance.

The present application discloses a kind of polyethylene terephthalate mixture and its preparation method and application, the polyethylene terephthalate mixture includes the following components: polyethylene terephthalate resin 45-86 parts by weight, toughening agent 0-10 parts by weight, reinforcing agent 10-50 parts by weight, nucleating agent 0.7-10 parts by weight, processing aid 0-3 parts by weight.The nucleating agent includes the combination of long-chain linear saturated lignosulfonate, talcum powder and polyethylene.The forming property of the polyethylene terephthalate mixture of the present application is further improved, the forming cycle is greatly shortened, the mechanical strength, toughness and heat distortion temperature can be maintained relatively high, the application range is further expanded, not limited by color, and can be applied to full-color products.

The invention discloses a length-adjustable large-size SBR rubber mould pressing foaming material which comprises the following raw materials in parts by weight: synthetic rubber C, vulcanizing agent insoluble sulfur medicine rubber, an accelerant DM, an accelerant M, a foaming agent AC6000, urea grease, argil, light calcium carbonate, talcum powder and mixed oil Y. The synthetic rubber C contains silicon-aluminum micro powder; the preparation method comprises the following steps: preparing mixed oil Y, preparing natural rubber premixed rubber A, preparing black smoke rubber masterbatch B, preparing synthetic rubber C, preparing rubber compound D and the like. The large-size foam material with the length of 11-12 m and the width of 1.5-1.6 m is successfully prepared through the three-step process of'primary low-temperature width fixing, secondary high-temperature extension and room-temperature shrinkage shaping 'in combination with precise regulation and control of the silicon-aluminum micro powder on a foam structure, the length can be flexibly adjusted according to actual requirements, and the large-size foam material is suitable for large-size foam materials with the length of 11-12 m and the width of 1.5-1.6 m. The problems of high splicing loss and poor adaptability of products with conventional sizes are solved, and the technical blank of large-size adjustable SBR foaming materials is filled.