102results about How to "Lower surface energy" patented technology

The invention relates to environment-friendly hydrophobic ink and a preparation method thereof, and belongs to the technical field of water-based ink. A copolymerization modifier capable of being combined in a water-based polyacrylate emulsion in an initiation polymerization mode in the stage of preparing the modified water-based polyacrylate emulsion is prepared, and an o-hydroxy aromatic ketone structure in the copolymerization modifier can endow water-based ink with lasting ultraviolet absorption performance; the trifluoromethyl structure can reduce the surface energy of the water-based ink, and the benzimidazole ring structure can form stable coordinate bonds with metal ions, so that the bonding performance of the water-based ink and a metal substrate is enhanced; when the copolymerization modifier is used for modifying the water-based polyacrylate emulsion, the long-term performance, the hydrophobic and oil-resistant performance and the adhesion performance on the surface of a metal base material of the finished water-based ink can be effectively improved.

The application belongs to the technical field of copper-based diamond composite materials, and particularly relates to a diamond copper-based composite material and a preparation method thereof. The preparation method comprises the following steps: mixing modified diamond powder and copper powder by ball milling, and obtaining a diamond copper core material after hot-pressing sintering; activating the diamond copper core material, then magnetron sputtering a Ni / Pr alloy target material onto the upper and lower surfaces of the activated diamond copper core material to form a Ni / Pr composite intermediate layer; vacuum welding copper sheets on the upper and lower surfaces of the Ni / Pr composite intermediate layer to obtain the diamond copper-based composite material. The diamond copper-based composite material prepared by the application has high density, excellent thermal conductivity, low thermal expansion coefficient and is convenient to process.

The invention relates to a two-component epoxy low-surface-energy primer-topcoat paint which is composed of an agent A and an agent B. The agent A comprises the following components in parts by weight: 150 parts of epoxy resin; 50 to 100 parts of a low surface energy filler; 50-100 parts by volume of a filler; 10 to 20 parts of pigment; 1 to 5 parts of a polymethyl alkyl siloxane defoaming agent; 3-10 parts of a low surface energy auxiliary agent; 30-60 parts of an organic solvent; the agent B is an amine epoxy curing agent; when in use, the mixing weight ratio of the agent A to the agent B is 200: (10-20); in conclusion, the two-component epoxy low-surface-energy primer-topcoat paint provided by the invention can solve the problem that the adhesive force of a traditional coating is reduced due to enrichment of low-surface-energy components on a surface layer through epoxy resin compounding, gradient distribution design of the low-surface-energy components and synergistic filling of multi-stage fillers; the double functions of corrosion prevention and low surface energy can be achieved through single-pass coating, and the coating is suitable for high-altitude, offshore and other complex working conditions.

The invention discloses a high-dispersity antimony oxide flame-retardant master batch based on nano modification and a preparation method thereof, and belongs to the technical field of flame-retardant modification of high polymer materials. The flame-retardant master batch consists of the following components in percentage by weight: 30-50% of nano antimony oxide, 3-8% of a dispersion modifier, 40-65% of carrier resin and 1-5% of a dispersing aid. The preparation method comprises the steps of nano antimony oxide pretreatment, mixing, melt extrusion, granulation and the like. Nano antimony oxide is subjected to surface modification through the dispersion modifier, and the synergistic effect of the auxiliary dispersant and the carrier resin is combined, so that the surface energy of the nano antimony oxide is effectively reduced, the problem that the nano antimony oxide is easy to agglomerate in a polymer matrix is solved, and high dispersity is realized; meanwhile, the flame-retardant synergistic efficiency is remarkably improved, the stability of the flame-retardant property of the material is ensured, and the mechanical property and the processing fluidity of a high polymer material are not damaged.

The invention relates to a cleaning agent used after SiC substrate grinding and a preparation method thereof, and relates to the field of semiconductor cleaning agents, and the cleaning agent is prepared from the following raw materials by mass: 4-8% of an anionic surfactant, 2-6% of a nonionic surfactant, 2-6% of a cleaning auxiliary agent, 8-12% of sodium hydroxide, 2-4% of a bio-based modified antistatic agent, and the balance of water. The preparation method comprises the following steps: heating water, adding sodium hydroxide, stirring, adding the cleaning aid, stirring, adding the premixed anionic surfactant and nonionic surfactant, stirring, adding the bio-based modified antistatic agent, stirring, cooling, and filtering to obtain the cleaning agent for grinding the SiC substrate. The cleaning agent has a good cleaning effect, can effectively remove impurities after grinding, and meets the requirement of the semiconductor industry for high-quality cleaning of SiC wafers.

The application discloses a high-temperature-resistant rubber cable and belongs to the technical field of cables.The high-temperature-resistant rubber cable comprises a core, an insulation layer and a sheath layer from inside to outside; wherein the raw material of the sheath layer comprises the following components: methyl vinyl silicone rubber, linear low-density polyethylene, a cross-linking agent, modified CeO2, an antioxidant and a lubricant.The application chemically grafts CeO2 by designing a multifunctional modifier, significantly improves the dispersity and interface bonding strength of the filler in the rubber matrix, improves the sheath tensile strength while maintaining good flexibility, and cooperatively endows the cable with excellent flame-retardant performance and high-temperature thermal stability.

The application belongs to the technical field of industrial coatings, and discloses a preparation process of self-cleaning FEVE varnish. The preparation process of the self-cleaning FEVE varnish comprises the following steps: (1) preparing a protective latex emulsion; (2) adding a wetting agent and a defoaming agent; (3) adding a composite sol; (4) adding FEVE resin, then adding a curing agent, and preparing the self-cleaning FEVE varnish after aging. The self-cleaning FEVE varnish prepared by the preparation process of the self-cleaning FEVE varnish has excellent adhesion, high weather resistance and good self-cleaning performance, and can be widely applied to building outer walls, transportation equipment, ocean facilities, urban public facilities and the like.

The invention relates to the technical field of compatilizers, and particularly discloses a P34HB-g-GMA compatilizer as well as a preparation method and application thereof. The P34HB-g-GMA compatilizer is prepared from the following preparation raw materials in percentage by mass: 88%-98% of poly (3-hydroxybutyrate-4-hydroxybutyrate), 0.02%-2% of an initiator, 1%-10% of glycidyl methacrylate, 0.1%-1% of an inhibitor, 0.1%-1% of a lubricant and 0.1%-1% of an auxiliary agent, wherein the sum of the mass percentages of the preparation raw materials is 100%. The P34HB-g-GMA, which is prepared by carrying out addition reaction on GMA serving as a grafting monomer and free radicals on a P34HB molecular chain, has the property of a compatilizer, and can be used for effectively improving the compatibility between PHA and other biological materials and improving the stability and the mechanical property of the composite material when being applied to a biodegradable composite material.

This invention discloses a strongly bonded surface glaze layer for stain-resistant ceramic tiles, its preparation method, and its application, relating to the field of ceramic tile manufacturing technology. The surface glaze layer comprises a microcrystalline glaze composite layer and a stain-resistant surface layer. The microcrystalline glaze composite layer contains a core-shell structured aluminum zirconium phosphate, and the stain-resistant surface layer contains a core-shell structured calcium-activated silica gel. The two layers are sintered to form Ca-Zr-P-O chemical bonds. This achieves strong interfacial bonding and, through the construction of a dense nanocomposite structure for synergistic stain resistance, results in excellent and long-lasting stain-resistant performance, significantly improving the stain resistance and service life of the ceramic tile. It solves the problem of stain-resistant layers easily detaching and failing during long-term use in existing ceramic tile technologies.

The application discloses a kind of fine-grained vanadium-titanium iron concentrate filtration pretreatment methods, comprising the following steps: fine-grained vanadium-titanium iron concentrate and water are mixed and the mass fraction of the fine-grained vanadium-titanium iron concentrate in the obtained suspension is adjusted to predetermined concentration, obtain first slurry;First slurry is passed through demagnetizer, and demagnetization is carried out, and second slurry is obtained;Second slurry is treated with ultrasonic wave, and third slurry is obtained;Third slurry is mixed with a predetermined amount of flocculating agent and then sent into a magnetic separation column after stirring, the operating parameters of the magnetic separation column are adjusted, the height difference between the mixed slurry in the magnetic separation column cylinder and the overflow surface is controlled, and the mass fraction of fine-grained vanadium-titanium iron concentrate in the fourth slurry flowing out of the magnetic separation column is controlled to be a predetermined concentration, and the flocculating agent is prepared from corn starch;Vacuum filtration is carried out on the fourth slurry.It is beneficial to increase the agglomeration diameter of fine-grained vanadium-titanium iron concentrate particles before filtration, reduce the moisture content of the product obtained after filtration of fine-grained vanadium-titanium iron concentrate, and improve the filtration efficiency.

The invention belongs to the technical field of inorganic materials, and particularly relates to a preparation method of high-purity barium carbonate. High-purity barium carbonate is prepared from a barium chloride solution and an ammonium bicarbonate solution through a coprecipitation method, a crystal form control agent is added into the barium chloride solution in advance, and a surfactant is added into the ammonium bicarbonate solution, so that an auxiliary agent is adsorbed to a potential crystal nucleus site in advance, the liquid phase interfacial tension is reduced, and the uniformity of a barium carbonate precipitation reaction is ensured; hyperbranched polycarboxylic acid and tartaric acid are compounded to form a crystal form control agent, polyacrylic acid and citric acid are compounded to form a composite dispersing system, the crystal form control agent, a surfactant and a composite dispersing agent are added, and the pH value in the reaction process is controlled, so that the prepared barium carbonate has higher purity and sphericity and narrower particle size distribution.

The invention belongs to the technical field of string adjustment, and particularly relates to a violin string tension adjustment control device which comprises an adjustment chamber, adsorption units are symmetrically arranged at one end of the adjustment chamber, positioning units are arranged on the sides, close to the adjustment chamber, of the adsorption units, an adjustment unit is arranged on one side in the adjustment chamber, and a feedback unit is arranged on one side of the adjustment unit. Through the lifting effect of the electric telescopic rod and the face-to-face or back-to-back movement between the idler wheels, lifting and sudden release of strings are achieved, then radial jumping of the strings is degraded and buffered through the multi-degree-of-freedom string roller, dominant impact between the lower electrode cap and the electrode ball is controlled through the prying roller short section, and therefore the electrode ball can be driven to move stably and stably. The high-frequency impact state between the strings and the long section of the prying roller is expressed, that is, impact feedback of the strings in a low-frequency state is explicitly and prominently expressed through an extended range, the change of tension is accurately sensed, excessive or insufficient adjustment is avoided, the overall tone balance is optimized, and the harmony degree and expressive force of the tone of the violin are improved.

The application belongs to the field of super-hydrophobic materials, and particularly relates to a fluorine-containing super-hydrophobic porous super-crosslinked polymer material and application thereof. The fluorine-containing super-hydrophobic porous super-crosslinked polymer material is prepared by a Friedel-Crafts reaction of a compound with rich pi electrons and capable of undergoing the Friedel-Crafts reaction as a monomer and tetrafluoro-p-dibromobenzene as a crosslinking agent. The contact angle of the fluorine-containing super-hydrophobic porous super-crosslinked polymer material prepared by the application can reach 160 degrees or more, and the super-hydrophobic performance can be maintained under harsh conditions such as strong acid, strong base and high temperature. The fluorine-containing super-hydrophobic porous super-crosslinked polymer material prepared by the application has uniform internal pore diameter and large specific surface area, can separate various emulsified oils, and the separation efficiency can be as high as 99% or more. After 10 cycles of recycling and use, the oil-water separation effect of the fluorine-containing super-hydrophobic porous super-crosslinked polymer material can still be maintained.

This invention relates to the field of thermal printing materials technology, specifically to a thermal film based on modified cellulose and its preparation method. To improve the waterproof and moisture-proof performance of the thermal film, this invention uses tetrafluorophthalic acid, containing a large amount of fluorine, as a raw material to undergo an esterification reaction with 1,3-di(4-hydroxybutyl)-1,1,3,3-tetramethyldisiloxane, thereby generating a hydroxyl-terminated fluorine intermediate containing fluorine and silicon elements. This improves the hydrophobic properties of the protective layer against water vapor and reduces the surface energy of the protective layer, reducing friction with other objects and reducing adhesion between thermal films. Based on this, this invention mixes the hydroxyl-terminated fluorine intermediate with polyether polyol and carboxymethyl cellulose, thereby grafting the polyether polyol and the hydroxyl-terminated fluorine intermediate into the cellulose carbon chain and crosslinking it with isocyanate to form a network crosslinked structure, achieving protection of the thermal imaging layer in the thermal film.

This invention discloses an organosilicon marine antifouling coating suitable for static marine facilities. The coating process involves reacting capsaicin with unsaturated acid anhydride monomers to eliminate the active free radical scavenging phenol groups and synthesize capsaicin unsaturated esters. These esters serve as inhibitors for subsequent free radical copolymerization. The capsaicin unsaturated esters then undergo free radical polymerization with unsaturated silane curing agent monomers to obtain capsaicin-modified silane curing agents. These modified organosilicon marine antifouling coatings are then prepared based on this modified silosilicon coating. In actual service, especially in static seawater environments, the low surface free energy of this coating inhibits the adhesion of fouling organisms. Simultaneously, the capsaicin groups stimulate fouling organisms, driving them away from the coating surface and significantly improving the antifouling effect of the coating on static marine facilities. This coating is particularly suitable for various static marine facilities subjected to long-term static immersion in seawater, achieving fouling prevention without relying on seawater erosion.

The invention relates to the technical field of X-ray detection scintillator materials, in particular to a samarium-doped halide scintillation film for X-ray-near-infrared cooperative imaging and a preparation process thereof, and the preparation process comprises the following steps: S1, adding CsEu1-xSmxI3 (x is greater than 0 and less than or equal to 0.1) crystal powder into PMMA, adding an interface modifier, and fully stirring to obtain a mixture A; s2, acetone is added into the mixture A, tannic acid and an auxiliary modifier are added after magnetic stirring, ultrasonic treatment is conducted, and a solution B is obtained; and S3, dispensing the solution B on a pretreated substrate, airing at 25-30 DEG C, and after the solution is volatilized, obtaining the samarium-doped halide scintillation film for X-ray-near infrared cooperative imaging. According to the preparation process of the halide scintillation film, the film-forming carrier resin with PMMA as the core is matched with the efficient dissolving and dispersing effect of the acetone solvent, the simple and controllable dispensing film-forming process is adopted, reaction at high temperature is not needed, and the preparation method is simple, green, low in toxicity and low in cost.

The application discloses an inorganic silicon modified water-based corrosion and rust prevention paint containing functional polysiloxane as well as a preparation method and application thereof. The paint contains, in parts by weight, 30-60 parts of a water-based hybrid acrylic emulsion, 1-15 parts of functional polysiloxane, 5-25 parts of inorganic silicon-based corrosion inhibitor filler, 10-40 parts of pigment and filler, 1-5 parts of water-based additive, and the balance of water. The functional polysiloxane is amino or silanol / alkoxy functionalized polysiloxane emulsion; and the inorganic silicon-based corrosion inhibitor filler is a combination of calcium ion exchange type silica gel pigment and calcium silicate. The inorganic hybrid emulsion, the functional polysiloxane and the inorganic silicon corrosion inhibitor pigment are compounded to endow the coating with excellent physical shielding property, active corrosion inhibition and surface hydrophobicity, realize fast drying, high hardness, excellent water and salt fog resistance and long-acting corrosion prevention performance, and especially can adapt to the harsh requirements of marine environment for the water-based corrosion prevention paint, which has important significance for the development of the shipbuilding industry.

This invention discloses a single-layer soft dental membrane and method for dental treatment or oral protection, belonging to the field of dental materials technology. The membrane is made of thermoplastic polyurethane elastomer (TPU) with a microphase separation structure and a hydrophilic modified layer containing polydopamine and hydrophilic polymer on its surface. The membrane has a Shore hardness of 75A-90A, a tensile strength of 15-50MPa, an elongation at break ≥500%, and a thickness of 0.5-6.0mm. The preparation method includes TPU drying, extrusion molding, plasma treatment, and hydrophilic coating impregnation reaction. The membrane of this invention has flexibility, durability, antibacterial properties, and high transparency, and its comprehensive performance is superior to that of existing EVA membranes. It can be used in dental whitening trays, sports mouthguards, or oral ulcer protection patches.

The application discloses an inorganic composite solid electrolyte and a preparation method thereof, and relates to the technical field of lithium batteries, and specifically discloses an inorganic composite solid electrolyte and a preparation method thereof. The preparation method of the inorganic composite solid electrolyte comprises the following steps: S1, mixing lithium salt, metal oxide A, metal oxide B and ammonium dihydrogen phosphate, wherein the metal oxide B is titanium oxide, and intermittent vibration ball milling is performed to obtain mixed powder; S2, adding lanthanum oxide and germanium oxide into the mixed powder obtained in the step S1, and continuing to perform intermittent vibration ball milling to obtain composite powder; and S3, performing low-temperature sintering on the composite powder obtained in the step S2, and pressing to obtain an inorganic composite solid electrolyte film layer. The preparation method can significantly improve the reaction activity and synergistic effect among raw materials by adopting two-step intermittent vibration ball milling and one-step low-temperature sintering, and the conductivity of the inorganic composite solid electrolyte and the lithium ion transmission performance and cycle life of the solid battery are improved, and meanwhile, no solvent is used in the preparation process, and the sintering cost is reduced.

This invention discloses a modified volcanic rock ultrafine composite admixture and its preparation method, belonging to the technical field of building materials and solid waste resource utilization. The admixture is composed of volcanic rock, S95 grade mineral powder, fluorogypsum, silica fume, lime powder, nano-alumina, triisopropanolamine, and polycarboxylate superplasticizer in a specific ratio. The invention also discloses its preparation method, including drying, weighing, and co-grinding the raw materials to a D50 of 7.0-8.0 μm. Through the synergistic activation effect among the components, especially the depolymerization of the volcanic rock vitreous network by F⁻ in the fluorogypsum, the adjustment of the calcium-silicon ratio between the mineral powder and volcanic rock, and the combined effect of nanomaterials and chemical additives, the early and late-stage activity of the volcanic rock is significantly improved, and the water demand is reduced. The obtained admixture has a 7-day activity index ≥85%, a 28-day activity index ≥88%, and a water demand ratio ≤108%, and can directly replace traditional mineral powder and fly ash in concrete, solving the problem of the scarcity of high-quality admixtures in western regions, and has significant economic and social benefits.

The invention provides silver-based conductive paste for a flexible electronic device, a preparation method and application, and relates to the technical field of new materials. The preparation method comprises the following steps: carrying out surface modification treatment on original nano silver powder by adopting organic acid to obtain modified nano silver powder; preparing an organic silicon rubber carrier which is composed of an organic solvent, a silane coupling agent and an additive; the modified nano silver powder is mixed with an organic silicon rubber carrier, homogenization treatment is carried out, the silver-based conductive paste is obtained, and the silver-based conductive paste has excellent dispersity and stability. According to the preparation method, agglomeration of the nano-silver particles is effectively prevented, the conductivity and applicability of the nano-silver paste are remarkably improved, and the preparation method is suitable for multiple fields such as electronic packaging.

This invention provides a water-based self-cleaning superhydrophobic coating, its preparation method, and its application. The water-based self-cleaning superhydrophobic coating comprises the following components in parts by weight: 0.1-0.2 parts acrylic monomers, 5-15 parts acrylate monomers, 6-12 parts acryloyloxysilane coupling agent, 14-26 parts F-SiO2 particles, 0.1-5 parts additives, and 54-68 parts solvent; wherein the F-SiO2 particles are SiO2 modified with a fluorosilane coupling agent. The coating of this invention exhibits excellent superhydrophobic, oleophobic, chemically resistant, and self-cleaning properties. The static contact angle of the coating with water reaches over 165°, demonstrating outstanding superhydrophobic and self-cleaning properties, superior to most commercially available hydrophobic and oleophobic acrylic resins. Furthermore, this invention also offers advantages such as zero VOC emissions, non-flammability, safer transportation and storage, shorter drying time, and lower environmental requirements.

The utility model provides a kind of for special-shaped vacuum bag of special-shaped mould, the special-shaped mould includes the mould cavity of trapezoidal cross section;The special-shaped vacuum bag is set on the mould cavity and seals the mould cavity;The cross-sectional shape of the special-shaped vacuum bag includes the main body structure of convex letter shape, and the main body structure includes sequentially arranged from top to bottom center protruding portion, lateral recess portion and base portion.The special-shaped vacuum bag provided by the utility model can meet the requirement of air tightness and vacuum keeping when applied to special-shaped mould, ensure the forming quality of composite material, avoid bubble, void and other problems.

The invention provides an anti-clogging composite drainage network and a preparation method thereof, and relates to the technical field of drainage networks. Comprising a net core and geotechnical cloth fixedly arranged on the two sides of the net core, the net core sequentially comprises an inner core and an outer core from inside to outside, the inner core is glass fiber reinforced HDPE, and the outer core is a polyurea coating; the geotechnical cloth is PP + ES geotechnical cloth. The problems that a net core is poor in compression resistance, low in hydraulic conductivity and low in transverse stretching, and geotechnical cloth is poor in acid and alkali resistance are solved.

The invention relates to the technical field of high polymer materials, and discloses a polyester release master batch as well as a preparation method and application thereof. According to the release master batch, polyester resin is used as a matrix, specific modified organic silicon resin is introduced, and the organic silicon resin is prepared from polydimethylsiloxane containing silicon-hydrogen bonds, multiple hydrogen bond unit monomers containing unsaturated double bonds and fluorine-containing chain segment monomers through a hydrogen-silicon addition reaction. Multiple hydrogen bond groups and fluorine-containing alkyl chain segments are introduced to the same molecular chain at the same time, so that the resin is endowed with temperature responsiveness, excellent dispersity in a polyester matrix and ultralow surface energy after film formation. The polyester release master batch is prepared by adopting a melt blending extrusion process, and then the polyester release master batch and the polyester resin are blended and stretched to prepare the release film, so that the release film has stable and adjustable release force and excellent fingerprint resistance and pollution resistance, keeps good transparency and dimensional stability, and is suitable for the fields of electronic packaging, optical protection films, die cutting materials and the like.

The invention relates to the technical field of furan resin, in particular to high-strength furan resin as well as a preparation method and application thereof. The high-strength furan resin comprises the following components in parts by weight: 35-60 parts of furfuryl alcohol, 15-25 parts of formaldehyde, 5-10 parts of urea, 1-3 parts of a formaldehyde reducing agent and 3-5 parts of a cross-linking agent. The high-strength furan resin provided by the invention is high-performance furan resin with high mechanical strength, excellent moisture resistance and low free formaldehyde release, and has a wide application prospect in the field of casting. The introduced cross-linking agent can improve the cross-linking density, improve the tensile strength and avoid brittle failure. In addition, carboxyl in molecules of the cross-linking agent can adjust polarity and compatibility of the system, phase separation in storage and use processes is inhibited, and the storage stability of the resin is remarkably improved. The formaldehyde reducing agent introduced by the invention can be subjected to nucleophilic addition reaction with free formaldehyde in a system, so that the formaldehyde content can be efficiently and enduringly reduced, and the production and use environment can be improved.

This invention provides a mechanically durable, antibacterial, and environmentally friendly marine antifouling coating, its preparation method, and its application. Belonging to the field of marine antifouling materials technology, it comprises the following components: a fluorinated quaternary ammonium salt polysiloxane prepolymer; nano-titanium dioxide; a curing agent; and pigments. The fluorinated quaternary ammonium salt polysiloxane prepolymer is prepared by dehydration condensation reaction of quaternary ammonium salt silane monomer A, phenyl silane monomer B, and fluorinated silane monomer C in an organic solvent under the action of an alkaline catalyst. The quaternary ammonium salt compounds used in this invention possess excellent environmental compatibility and outstanding rapid antibacterial and algaecidal effects, endowing the material surface with continuous microbial inhibition and killing properties. By disrupting the integrity of bacterial cell membranes and interfering with the activity of biological enzymes, it blocks the colonization and reproduction chain of marine attached organisms from the source, significantly improving the coating's resistance to typical fouling organisms such as barnacles and diatoms. Simultaneously, it can significantly improve the coating's modulus and hardness, making it more resistant to scratches, abrasions, and impacts.

The application belongs to the technical field of surface modification and relates to a system and method for preventing the inner wall of a fly ash low-temperature pyrolysis furnace from being caked, which comprises the following steps: S1, inner wall surface pretreatment: performing sand blasting polishing treatment on the inner wall of the low-temperature pyrolysis furnace to remove surface rust, residual caked substances and caking force points, then cleaning surface oil stains with an organic solvent, and then blowing dry with high-pressure air and removing residual dust; S2, hydrophobic coating spraying and curing: uniformly spraying a hydrophobic coating material on the inner wall surface treated in step S1, controlling the coating thickness to be less than 100 microns, and then putting into use after natural curing and static curing; and S3, intermittent high-pressure inert gas blowing during operation: in the operation process of the low-temperature pyrolysis furnace, the high-pressure gas blowing subsystem sprays high-pressure inert gas to the inner wall of the low-temperature pyrolysis furnace in an intermittent and instantaneous burst mode to remove the fly ash initially adhered to the inner wall and inhibit the formation and growth of caking points.

This invention discloses an environmentally friendly, mildew-resistant, and hydrophobic EVA composition and its preparation method, belonging to the field of plastics technology. The environmentally friendly, mildew-resistant, and hydrophobic EVA composition provided by this invention comprises the following components: 80-100 parts of ethylene-vinyl acetate copolymer, 3-8 parts of compatibilizer, 10-20 parts of heat-resistant hydrophobic modified masterbatch, 10-30 parts of mica powder, 2-10 parts of antibacterial and mildew-resistant masterbatch, 0.1-2 parts of lubricant, and 0.1-1 parts of antioxidant. The heat-resistant hydrophobic modified masterbatch is polysiloxane-grafted EVA with fluorinated side chains and cyclic hard segments. The EVA composition provided by this invention has good tensile strength, hydrophobic effect, antibacterial and mildew-resistant properties, and heat resistance, making it suitable for use as a material in applications such as shower curtains that operate under high temperature and high humidity conditions for extended periods.

This invention discloses a PVA water-soluble adhesive tape and its preparation method, relating to the field of environmentally friendly polymer materials technology, and belonging to patent classification number C09J103 / 04. The method includes the following steps: mixing oxidized starch with deionized water, adding polyamide polyamine epichlorohydrin resin, and heating to carry out an ionic crosslinking reaction to obtain ionicly crosslinked starch; cooling the ionicly crosslinked starch, then adding carboxybetaine methacrylate and ammonium persulfate, and heating to carry out a free radical grafting reaction to obtain modified starch; adding polyvinyl alcohol aqueous solution and borax decahydrate to the modified starch to carry out a borate ester crosslinking reaction to obtain a water-soluble starch-based adhesive; preparing a PVA film substrate using a blown film process, uniformly coating the water-soluble starch-based adhesive onto the PVA film substrate using a precision coating machine, and then curling and slitting to obtain the PVA water-soluble adhesive tape. The PVA water-soluble adhesive tape prepared by this invention not only has good water solubility but also excellent adhesive properties.