199 results about "Calcium stearate" patented technology

The invention relates to the technical field of PA resin, and particularly discloses glass fiber modified antibacterial PA resin suitable for children products and a preparation method of the antibacterial PA resin. The invention discloses glass fiber modified antibacterial PA resin suitable for children products. The glass fiber modified antibacterial PA resin comprises PA resin, glass fibers, talcum powder, nano calcium carbonate, a composite antibacterial agent, a compatilizer, an antioxidant and calcium stearate, the composite antibacterial agent comprises chitosan, an antibacterial peptide microcapsule and a porous silver-zinc-loaded antibacterial agent; the antibacterial peptide microcapsules are sodium alginate embedded antibacterial peptides. The antibacterial PA resin obtained in the invention has the highest bacteriostasis rates of 99.97%, 99.74% and 99.95% for staphylococcus aureus, escherichia coli and candida albicans respectively, the antibacterial property of the PA resin is improved, the compressive strength and notch impact strength are 170.6 MPa and 17.3 kJ / m < 2 > respectively, and high mechanical strength is maintained on the basis of high antibacterial property.

The invention relates to the technical field of pharmaceutical preparations, in particular to a solid dispersion-based sustained-release drug composite carrier as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out synergistic spray drying on double polymers (hydroxypropyl methylcellulose acetate succinate and polyvinylpyrrolidone-vinyl acetate copolymer) to form a solid dispersion; compounding with mesoporous silica and calcium silicate for localization, and spraying ethanol to activate pores; calcium stearate and magnesium stearate are sequentially added for lubrication; prefabricating a sustained-release skeleton master batch; and finally, mixing, rolling and forming. According to the method, through hierarchical structural design, the drug stability, the powder fluidity and the release controllability are remarkably improved, the method is suitable for industrial production of the dihydroergoline mesylate sustained release preparation, and a release curve is smooth and reliable.

The invention provides a high-toughness bundling grating and a production process of the high-toughness bundling grating. The composite material is prepared from the following raw materials in parts by weight: 32 to 42 parts of epoxy modified unsaturated polyester resin, 26 to 36 parts of alkali-free glass fiber, 7 to 11 parts of metallocene polyolefin, 5 to 9 parts of high-branching-degree polyolefin, 4 to 8 parts of ethylene propylene diene monomer, 2.5 to 5.5 parts of core-shell structure elastomer toughening agent, 1.5 to 4.5 parts of modified nano aluminum nitride-graphene composite filler, 0.7 to 1.1 parts of silane coupling agent and 0.5 to 0.9 part of antioxidant. 0.4 to 0.7 part of ultraviolet stabilizer, 0.4 to 0.8 part of calcium stearate and 0.1 to 0.3 part of conductive additive. According to the invention, the core-shell structure elastomer toughening agent realizes toughening without damaging strength through core-shell synergy, and the impact strength is improved by 40% or above; the modified nano aluminum nitride-graphene composite filler constructs a heat conduction-antistatic network, and the modified nano aluminum nitride-graphene composite filler and the metallocene polyolefin are matched with the high-branching-degree polyolefin and the ethylene propylene diene monomer to enhance low-temperature toughness and creep resistance.

The invention discloses a recycled PP composite material with flame-retardant and antibacterial properties and a preparation method thereof, and relates to the technical field of recycled PP composite materials. The recycled PP composite material with flame-retardant and antibacterial properties is prepared from the following raw materials in parts by weight: 60 to 75 parts of recycled PP, 15 to 25 parts of modified magnesium hydroxide, 3 to 8 parts of modified chitosan, 2 to 5 parts of ethylene-vinyl acetate copolymer, 0.5 to 1.5 parts of silane coupling agent KH-550, 8 to 15 parts of ammonium polyphosphate, 0.3 to 0.8 part of calcium stearate, 1 to 3 parts of nano titanium dioxide and 0.2 to 0.6 part of tributyl citrate. The recycled PP composite material has the remarkable advantages that the recycled PP is used as a base material, so that the environment is protected and the cost is low; through compounding of modified magnesium hydroxide, modified chitosan and the like, the flame-retardant antibacterial coating has excellent flame-retardant and antibacterial properties; the preparation process is clear and controllable, the raw material compatibility is scientific, the compatibility of the components is good, the product performance is stable, and the application prospect is wide.

The application discloses a polypropylene woven bag and a preparation method thereof. The polypropylene woven bag is woven by a woven material, and the woven material comprises the following components in parts by weight: polypropylene 90-110 parts, alumina whisker 8-12 parts, carbon nanotube with surface modified polydopamine 0.5-1 part, calcium stearate lubricant 0.5-1 part, ethylene-butyl acrylate-maleic anhydride terpolymer compatibility agent 5-10 parts, and antioxidant 0.3-0.6 part. The preparation method comprises the following steps: adding the components of the woven material into a high-speed mixer, and mixing to obtain a mixture; feeding the mixture into an extruder, and performing melting extrusion, cooling, stretching and setting to prepare polypropylene flat filaments; cross-weaving the polypropylene flat filaments into woven cloth, performing pattern printing on the surface of the woven cloth, and then sequentially performing cutting, sewing or bonding to seal the bottom, so that the polypropylene woven bag is prepared. The polypropylene woven bag obtained by the method has excellent wear resistance and good toughness.

The invention discloses a polypropylene beta crystal form compound nucleating agent, a beta crystal form homo-polypropylene pipe special material and a production process thereof, and belongs to the technical field of polypropylene materials. The polypropylene beta crystal form compound nucleating agent disclosed by the invention is prepared from the following components in percentage by weight: 15 to 20 percent of beta crystal form nucleating agent, 60 to 70 percent of antioxidant, 7 to 11 percent of calcium stearate and 5 to 10 percent of polyphthalamide. The polypropylene beta crystal form compound nucleating agent has the advantages of high beta crystal form conversion rate, high rigidity, low dosage, good dispersity and the like, and the normal and low temperature impact strength of the material can be greatly improved. The beta crystal form homo-polypropylene pipe special material product obtained by the production process has excellent impact strength, thermal deformation temperature and flexural modulus performance, also has excellent processability, and is suitable for the fields of chemical pressure pipelines and pipe fittings, extrusion and compression molded plates, filter plates and solid rods.

The invention belongs to the technical field of daily plastic products, and particularly relates to a high-temperature-resistant reinforced transport case material and a preparation method thereof. The transport case is prepared from the following raw materials in parts by mass: 88 to 100 parts of polypropylene, 8 to 12 parts of PP-g-ITA, 7 to 10 parts of PP-g-AN, 0.05 to 0.2 part of an aryl dicarboxamide nucleating agent, 5 to 8 parts of fibers, 3 to 5 parts of mica powder, 0.2 to 0.5 part of an antioxidant, 0.1 to 0.2 part of a benzotriazole ultraviolet absorbent, 0.2 to 0.3 part of a silane coupling agent, 0.1 to 0.2 part of polyethylene wax, 0.2 to 0.4 part of calcium stearate and 0.1 to 0.3 part of pentaerythritol stearate. The preparation method of the high-temperature-resistant reinforced transport case material is simple, and a transport case prepared from the high-temperature-resistant reinforced transport case material is excellent in thermal stability, weather resistance and mechanical property.

The invention discloses a temperature and pressure coordinated regulation and control method and system for a calcium stearate reaction process, and relates to the field of industrial control, the system comprises an acquisition module, a processing decision module and a regulation and control module, and the acquisition module measures temperature and pressure at high frequency in each period and generates a parameter sequence; the processing decision module performs Kalman filtering on the parameter sequence to obtain a de-noising parameter sequence, performs subtraction on the de-noising parameter sequence and a target parameter to generate a deviation value sequence, and decides whether to regulate and control by counting an over-limit time ratio; when regulation and control are needed, the regulation and control module obtains a reaction fixed parameter set, establishes a correlation formula, calculates a coupling coefficient vector sequence, splices the coupling coefficient vector sequence and a denoising parameter sequence into a trend characteristic matrix, inputs the trend characteristic matrix and a control parameter vector into a regulation and control network, and carries out dynamic attention convolution, equipment aging deduction, graph convolution and time sequence prediction. And iteratively updating the parameter control vector to obtain an optimal parameter control vector, thereby realizing precise linkage control of temperature and pressure.

The invention discloses a catalyst for circulating hydrogen storage of 1, 4-butanediol / gamma-butyrolactone as well as a preparation method and application of the catalyst, and belongs to the technical field of catalysts. The catalyst comprises bimetallic active components CuO and AgO, a skeleton component, a rare earth auxiliary agent and calcium stearate, the skeleton component comprises CeO2 and at least one of the following oxides: ZnO, TiO2, ZrO2, MoO3 and Al2O3; on the basis of the total mass of the catalyst, the content of CuO is 55-80 wt%, and the content of AgO is 0.5-1.5 wt%; the total content of the skeleton component is 15-42 wt%, wherein the content of CeO2 is 10-38 wt%; the content of the rare earth additive oxide is 1-5wt%; and the content of calcium stearate is 1.5-4.5 wt%. The preparation method comprises the following steps: preparing a carrier precursor through a coprecipitation method; auxiliary loading and crystal phase regulation and control; and post-processing and forming. The catalyst provided by the invention completely avoids the use of elements harmful to the environment, and has high activity, high selectivity, excellent carbon deposition resistance and long-period stability.

The invention discloses a composite woven bag and a preparation method thereof, and belongs to the technical field of woven bags, and the woven bag comprises the following components: polypropylene resin, calcium stearate, a polyolefin elastomer, polyethylene resin, nano cerium oxide, titanium dioxide and an auxiliary agent. The preparation method of the woven bag comprises the following steps: S1, preparing the inner layer surface material; s2, preparing an outer layer membrane material; s3, compounding the inner-layer membrane material and the outer-layer membrane material to prepare a composite surface material; and S4, the composite surface material is subjected to wire cutting to prepare a composite wire material, and the woven bag is prepared through the composite wire material. According to the woven bag woven by using the composite wires, the outer layer absorbs energy of ultraviolet rays through mutual circulation conversion in the nano cerium oxide, absorption of the woven bag to the ultraviolet rays is further reduced in cooperation with the reflection effect of the titanium dioxide, and the ultraviolet aging resistance of the woven bag is enhanced.

The application discloses a kind of bottle cap antibacterial plastics and preparation method thereof, belong to high polymer material production technical field, first, the bottle cap antibacterial plastics provided by the application includes the following mass parts raw materials: improved branched copolymer polypropylene: 70~80 parts, ZnO@ZrP core-shell powder: 2.0~3.0 parts, maleic anhydride grafting hydrogenated styrene-butadiene block copolymer: 5~8 parts, ethylene-octene copolymer: 8~12 parts, antioxidant 1010: 0.3~0.5 parts, calcium stearate: 0.5~1.0 parts.The bottle cap antibacterial plastics prepared by the application meets European Union EC No 1935 / 2004, Chinese GB 4806.7-2016 and other food contact material standards, provides a high reliability solution for beverage, pharmaceutical packaging.

The invention provides a high-strength collision-resistant cable and a preparation method thereof. The high-strength collision-resistant cable comprises an oxygen-free copper conductor, a modified insulating layer, a multifunctional buffer layer, a high-strength armor layer and a wear-resistant outer sheath which are sequentially arranged from inside to outside, the invention relates to a preparation method of an anti-aging agent. The high-strength collision-resistant cable is prepared from the following raw materials: 35 to 45 parts of modified crosslinked polyethylene, 12 to 18 parts of polyisobutene grafted maleic anhydride-nano boron nitride compound, 8 to 15 parts of modified high-performance polypropylene-graphene quantum dot compound, 3 to 6 parts of nano titanium dioxide, 7 to 12 parts of aramid staple fiber, 5 to 10 parts of melamine cyanurate and 0.8 to 1.5 parts of calcium stearate. 0.5 to 1.0 part of a silane coupling agent, 6 to 10 parts of polycaprolactone and 0.3 to 0.8 part of an antioxidant. The obtained cable has excellent comprehensive performance of high strength, impact resistance, insulation, flame retardance and weather resistance.

The application discloses a light heat-insulation material, which uses silicate cement as a basic material of the light heat-insulation material, uses hydrogen peroxide as a foaming agent, uses sodium dodecyl benzene sulfonate as a surfactant, reduces the surface tension of bubbles, uses calcium stearate as a foam stabilizer, uses PP fiber to improve the flexibility of the material, and adjusts the addition amount of metakaolin to obtain the light heat-insulation material, which meets the use requirements of porosity, thermal conductivity and compressive strength. Compared with the same material in the prior art, the raw material composition is simple, the preparation process is convenient, and production is efficient. In addition, if the addition amount of metakaolin is too low, the compressive strength of the light heat-insulation material is insufficient, and if the addition amount of metakaolin is too high, the porosity of the light heat-insulation material is too low and the thermal conductivity is too high. Therefore, compared with 100 parts by weight of the silicate cement, the addition amount of metakaolin needs to be controlled in a range of 36 parts by weight to 73 parts by weight.

A synthetic fiber is disclosed, formed from a composition which is made of from about 1 to about 98 weight percent of at least one polyhydroxyalkanoate; from about 1 to about 10 weight percent of at least one nucleating agent selected from the group consisting of polyester waxes, behenamide, crodamide, stearamide, erucamide, pentaerythritol, dipentaerythritol, boron nitride, and mixtures thereof; and from about 0.1 to about 5 weight percent of at least one melt flow modifier selected from the group consisting of calcium stearate, zinc stearate, starch, diamide oligomers, organic peroxides, and mixtures thereof.

This invention provides a high-temperature resistant, halogen-free, flame-retardant polyester heat-shrinkable material and its preparation method. The heat-shrinkable material comprises the following components and their mass percentages: high-viscosity PET 35-55%, PETG 15-30%, PTT 10-20%, vinyl-grafted multi-component copolymer 2-10%, HDPE 4-10%, hypophosphite flame retardant 12-20%, calcium stearate 0.1-2%, antioxidant 0.5-3%, and organic nano-montmorillonite 1-5%; wherein the viscosity of the high-viscosity PET is greater than 1.0 dL / g. The heat-shrinkable tubing prepared by the technical solution of this invention has good shrinkage properties, can pass the UL94 V0 flame retardant rating for vertical burning, and can be used for a long time in a high-temperature environment of 125℃. It can withstand baking at 180℃ for more than 4 hours without cracking and has good toughness; at the same time, it has good high and low temperature impact resistance and higher temperature resistance durability.

The invention discloses a glass fiber reinforced polypropylene composite material with high impact strength. The glass fiber reinforced polypropylene composite material comprises the following components: polypropylene, pretreated glass fibers, a compatilizer, an antioxidant, calcium stearate and a lubricant, wherein the pretreated glass fiber is obtained by infiltrating glass fiber in distilled water. The invention also provides a preparation method. The preparation method comprises the following steps: mixing the polypropylene, the compatilizer, the antioxidant, the calcium stearate and the lubricant in parts by weight, and adding the mixture into a main feeding port of a double-screw extruder; and feeding the pretreated glass fiber into a glass fiber opening, and carrying out melt extrusion granulation by a double-screw extruder to prepare the high-impact-strength glass fiber reinforced polypropylene composite material. The glass fibers are subjected to short-time infiltration treatment by using distilled water, impurities on the surfaces of the glass fibers are effectively removed, the surface state is optimized, the impact strength of the glass fiber reinforced polypropylene composite material is remarkably improved on the premise of not using an additional coupling agent, and meanwhile, good rigidity and processability are kept.

The application relates to the cable field and particularly discloses a mine rubber-sheathed cable insulation shielding material and a preparation method thereof. The insulation shielding material comprises the following raw materials in parts by weight: chlorinated polyethylene 100 parts; conductive carbon black 37-40 parts; graphene 1-2 parts; flake graphite powder 3-6 parts; plasticizer 25-30 parts; light magnesium oxide 6-10 parts; calcium stearate 1-2 parts; antioxidant 1-2 parts; calcium hydroxide 3-5 parts; vulcanization cross-linking system 7-9 parts; polyethylene wax 1-2 parts; peeling regulation component, which comprises 3-4 parts of polytetrafluoroethylene superfine powder, 2.5-3.5 parts of shellac and 1.5-2.5 parts of fluorosilicone oil. The preparation method comprises the following steps: raw material pretreatment; and sectional temperature control mixing. The insulation shielding material has the advantages of excellent processing technology, conductive performance and stable controllable peelable interface between the insulation shielding material and the ethylene-propylene insulation layer.

The application discloses a high-temperature-resistant polyvinyl chloride adhesive tape and a preparation method thereof, and belongs to the technical field of polymer materials and adhesive products. The high-temperature-resistant polyvinyl chloride adhesive tape comprises the following raw materials in parts by weight: synergistically modified polyvinyl chloride, diphenyl phosphine oxide, chlorinated polyethylene, diisononyl phthalate, antimony trioxide, calcium stearate, zinc stearate, an antioxidant and a leveling agent; the synergistically modified polyvinyl chloride is obtained by introducing catechol structures on the surface of polyvinyl chloride through dopamine self-polymerization deposition, forming a dynamic borate ester structure with 3-aminobenzoic acid, and constructing a Si-O-Si network structure through hydrolytic condensation reaction of octa(3-aminopropyl)silsesquioxane and N-(beta-aminoethyl)-gamma-aminopropyl triethoxysilane. The dopamine-borate ester-silicone synergistic network structure is constructed, and the diphenyl phosphine oxide is introduced for function regulation, so that the heat resistance, mechanical properties and dimensional stability of the polyvinyl chloride adhesive tape are significantly improved.

The invention provides a high-strength anti-aging modified PVC (polyvinyl chloride) lamplight film and a preparation method thereof, and relates to the technical field of lamplight films. The high-strength aging-resistant modified PVC lamplight film is prepared from the following materials in parts by weight: 100 parts of PVC resin powder, 40 to 60 parts of plasticizer, 10 to 15 parts of ZnO coated SiO2, 0.3 to 0.8 part of hindered amine light stabilizer, 0.2 to 0.6 part of ultraviolet light absorber, 2 to 4 parts of calcium-zinc heat stabilizer, 0.5 to 1 part of calcium stearate, 0.1 to 0.3 part of polyethylene wax, 0.1 to 0.3 part of dispersing agent, 1 to 2 parts of processing aid and 3 to 5 parts of flexibilizer. The invention aims to provide the high-strength anti-aging modified PVC lamplight film aiming at the defects in the prior art, and the balance between the strength and the anti-aging performance is improved.

The invention relates to the technical field of polymer composite materials, in particular to a highly wear-resistant and scratch-resistant PET film for an automobile and a preparation method of the highly wear-resistant and scratch-resistant PET film. The highly wear-resistant and scratch-resistant PET film is prepared from the following raw materials in parts by weight: 100 parts of PET matrix resin, 5-15 parts of an additive A, 2-8 parts of an additive B, 0.3-1 part of an antioxidant 1010, 0.5-1 part of an ultraviolet light absorber and 0.5-2 parts of calcium stearate. The additive A forms a cross-linked network with silk fibroin and chitosan through a treating fluid, a silane coupling agent is introduced to enhance interface bonding, the filling density and surface hardness of the PET film are effectively enhanced, the additive B takes sodium alginate as a framework, and a silicon dioxide composite structure formed by hydrolyzing a pretreated cardanol derivative and tetraethoxysilane is combined, so that the filling density and surface hardness of the PET film are improved. Through the synergistic effect of microcosmic toughening and inorganic particles, the wear resistance and scratch resistance of the PET film are improved, and the prepared PET film has the comprehensive properties of wear resistance and scratch resistance.

The invention relates to the technical field of cable protection layers, in particular to a corrosion-resistant underground cable protection layer and a preparation method thereof. The corrosion-resistant underground cable protection layer comprises 75-82 parts of high-density polyethylene, 10-15 parts of an ethylene-tetrafluoroethylene copolymer, 4-6 parts of a compatibilizer, 10-15 parts of glass fibers, 1-3 parts of calcium stearate, 5-10 parts of a dopamine modified filler, 5-10 parts of aminated boron nitride, 1-4 parts of a waterproof agent, 6-10 parts of a flame retardant and 2.5-3 parts of an antioxidant. The dopamine modified filler comprises dopamine modified polyaspartic acid and dopamine modified zinc oxide. According to the invention, the high-density polyethylene and the ethylene-tetrafluoroethylene copolymer are taken as a matrix and are matched with the dopamine modified filler, so that the underground cable protection layer is endowed with excellent acid and alkali corrosion resistance. And by adding aminated boron nitride and glass fiber, the mechanical strength is further improved, and the service life of the cable protection layer is remarkably prolonged.

The application discloses a kind of high barrier polypropylene plastic cups and preparation method thereof, it is related to high-performance polypropylene technical field.The method is to prepare silane pretreatment fluid with 3-methacryloxypropyl trimethoxysilane, after adding nano montmorillonite and reacting, drop into hexadecyl trimethyl ammonium bromide solution, after desolventizing, mixed with maleic anhydride grafted polypropylene, drying and crushing to obtain composite modified nano montmorillonite;Ethylene-vinyl alcohol copolymer is crosslinked with hexamethylene diisocyanate, then nano titanium dioxide modified by titanate coupling agent NDZ-311 is added, after reaction, precipitation, washing and drying, crosslinked modified EVOH is obtained;Polypropylene is mixed with composite modified nano montmorillonite, crosslinked modified EVOH, antioxidant 1010, antioxidant 168 and calcium stearate, extruded, pelletized and dried;The dried particles are injection molded into cup blanks, and the oven is cooled after heat preservation to obtain high barrier polypropylene plastic cups.The polypropylene plastic cup prepared by the application has excellent barrier properties.

The invention discloses a matte PETG polyester material and a preparation method thereof, and relates to the technical field of high polymer materials. The matte PETG polyester material is prepared from the following raw materials in parts by weight: 60 to 80 parts of PETG resin, 5 to 12 parts of modified silicon dioxide, 4 to 10 parts of a modified ethylene-methyl acrylate copolymer, 1 to 3 parts of polyethylene glycol 4000, 0.2 to 0.5 part of an antioxidant 1010, 0.1 to 0.3 part of an antioxidant 168, 0.3 to 0.8 part of calcium stearate and 0.2 to 0.6 part of an ultraviolet light absorber UV-531. The matte PETG polyester material is scientific in formula, and the performance of the material is improved through the synergistic effect of the modified silicon dioxide and the modified ethylene-methyl acrylate copolymer. The preparation process is controllable, parameters of steps of drying, mixing, extruding and the like are clear, and the product stability is good. The antioxidant, the ultraviolet light absorber and the like are added, so that the anti-aging and anti-ultraviolet functions are achieved, and the application prospect is wide.

This invention discloses an environmentally friendly shale brick based on multi-source waste and its preparation method. Using shale as the matrix, it is compounded with fine powder from construction waste, sludge incineration ash, waste ceramic powder, and rice husk charcoal. Simultaneously, calcined kaolin, red mud, silane coupling agent, calcium stearate, sodium carboxymethyl cellulose, polyvinyl alcohol, and sodium lignosulfonate are introduced to form a composite system of "inorganic solid waste + mineral reinforcement + organic modification + low-temperature segmented sintering." The organic components play a role in plasticizing, binding, water retention, and crack reduction during the green body stage. They completely pyrolyze at high temperatures without residue and do not affect mineral phase formation. In synergy with the inorganic system, the green body achieves crack-free construction, extremely low shrinkage, and significantly improved strength.

The invention discloses a novel wear-resistant polyformaldehyde composite material and a preparation method thereof, the novel wear-resistant polyformaldehyde composite material is prepared by melting and blending the following raw materials: 84-94 wt% of a polyformaldehyde resin component, 0.8 wt% of calcium stearate, 0.2 wt% of an antioxidant and 5-15 wt% of a graft copolymer component, and the proportion of the polyformaldehyde resin and the graft copolymer is based on the total weight of the polyformaldehyde composite material. The grafted copolymer is polyethylene-grafted-poly (styrene-acrylonitrile), the grafted copolymer takes polyethylene as a main chain and takes poly (styrene-acrylonitrile) as a grafted branch chain, and the polyethylene-grafted-poly (styrene-acrylonitrile) is uniformly dispersed in a sea phase formed by the polyformaldehyde resin in an island phase form with the average particle size of 0.1-5 microns. The polyformaldehyde composite material disclosed by the invention has the beneficial effects that the friction coefficient is reduced and the wear resistance is remarkably improved while high rigidity and strength of polyformaldehyde resin are maintained, and meanwhile, good balance between toughness and lubricity is realized, so that the harsh requirements of high-end precision moving parts on the comprehensive performance of the material are met.

This invention relates to the field of materials preparation technology, specifically to a plant fiber material composed of a matrix resin, plant fibers, a composite modifier, an antioxidant, and an ultraviolet absorber. The plant fibers are a single plant fiber or a mixture of at least two plant fibers. The composite modifier includes a silane coupling agent, maleic anhydride-grafted polypropylene, and calcium stearate, and may also contain nano-silica. This invention constructs a composite plant fiber system, combining the performance characteristics of different plant fibers to achieve complementary advantages. It overcomes the limitations of single plant fiber mechanical properties, significantly improving the tensile strength, bending performance, and impact toughness of the material, enabling it to adapt to more scenarios with diverse mechanical performance requirements.

Methods of making stable, dry coated fruit powders are provided. The methods include providing a fruit powder; selecting a hydrophobic stearate guest particle from the group consisting of ammonium stearate, zinc stearate, calcium stearate, sodium stearate, potassium stearate, magnesium stearate, glyceryl stearate, propylene glycol monostearate, sorbitan stearate, triglyceryl monostearate, hexaglyceryl distearate, and decaglyceryl monostearate; and dry coating the fruit powder with the hydrophobic stearate guest particles using high shear. The hydrophobic stearate guest particles are dry coated with respect to the fruit powder at levels between about 1 and 10 wt % in order to form a continuous layer.

The waterproof film is prepared from the following components: 50 to 70 parts of polypropylene and polystyrene blend, 4 to 6 parts of nano silicon dioxide particles, 4 to 6 parts of nano titanium dioxide particles, 2 to 4 parts of dioctyl phthalate, 3 to 6 parts of antibacterial powder, 1 to 2 parts of graphite powder, 1 to 3 parts of stabilizer, 1 to 3 parts of defoaming agent and 5 to 10 parts of film aid. According to the invention, polypropylene provides mechanical strength and chemical resistance, polystyrene enhances flexibility and processing fluidity, and balance of high mechanical strength and excellent waterproofness is realized through the synergistic effect of a blend of polypropylene and polystyrene, nano silicon dioxide particles and nano titanium dioxide particles; the nano silicon dioxide particles and the nano titanium dioxide particles are combined with a polymer chain through surface hydroxyl groups to form a hydrophobic interface, the waterproofness is remarkably improved, the dioctyl phthalate is used for improving the flexibility and impact resistance of the film, and the long-term use reliability of the material in a humid or chemical environment is ensured through the calcium stearate stabilizer.

The invention discloses a bio-based degradable wrapping film and a preparation method thereof in the field of green logistics and environment-friendly packaging. The wrapping film is prepared from polylactic acid, poly (butylene succinate), triethyl citrate, an antioxidant, calcium stearate and two novel inorganic modified compounds. Wherein the zirconium phosphate-sodium carboxymethyl cellulose intercalation compound constructs an organic-inorganic hybrid structure through alkaline intercalation, so that the dispersity and interfacial compatibility of the filler are effectively improved; the lanthanum titanate-zinc oxide core-shell nano hybrid is prepared by combining a solvothermal method with a urea precipitation process, has regular core-shell morphology, can synergistically enhance mechanical properties, regulate and control degradation rate, and endows antibacterial and ultraviolet shielding functions. The wrapping film prepared by melt blending and film blowing processes has high tensile strength, excellent ductility, good transparency and controllable compost degradability.

This invention discloses a heat- and impact-resistant protective conduit for MPP cables and its preparation method, relating to the field of polymer materials technology. The components, by weight, include: 20-22 parts of a toughening dispersion made from anhydrous ethanol and terminally epoxy-terminated hyperbranched polysiloxane; 33-35 parts of a boron-nitrogen co-doped carbon dot made from citric acid, boric acid, and urea, first compounded with phytic acid and piperazine, then compounded with modified zirconium phosphate prepared by hexadecyltrimethylammonium bromide intercalation, and then modified with silane coupling agent KH-560 to form a flame retardant synergist; 12-14 parts of polyolefin elastomer; 2-2.5 parts of magnesium aluminum hydrotalcite; 0.2-0.24 parts of antioxidant; 0.2-0.3 parts of calcium stearate; 0.2-0.3 parts of polyethylene wax; and 100-120 parts of polypropylene. The introduction of the flame retardant synergist and other raw materials in this invention effectively improves flame retardancy, aging resistance, impact resistance, low-temperature resistance, and heat resistance.