61 results about "Pvc matrix" patented technology

The invention provides a special rare earth antibacterial master batch for a PVC antibacterial air conditioner condensate pipe and a preparation method of the special rare earth antibacterial master batch. The problems that an existing PVC condensate pipe is poor in antibacterial performance, and a rare earth antibacterial agent and PVC resin are poor in compatibility and dispersity are solved. The master batch comprises PVC carrier resin, a rare earth antibacterial agent, a dispersing agent, a plasticizer, a heat stabilizer, a lubricant and a bulking agent, and the rare earth antibacterial agent is prepared by mixing rare earth oxide and inorganic oxide according to a specific proportion and carrying out mechanical dispersion, high-energy dispersion, secondary mechanical dispersion, drying, tunnel kiln firing and grinding treatment. The preparation method of the special rare-earth antibacterial master batch for the PVC antibacterial air conditioner condensate pipe comprises the steps of raw material pretreatment, raw material premixing, coupling treatment, mixing and plasticizing, melt extrusion, granulation molding and the like, and through a refining process and a supercritical carbon dioxide technology, it is ensured that a rare-earth antibacterial agent is uniformly dispersed and stably combined in a PVC matrix; the master batch with excellent antibacterial property, thermal stability and mechanical property is prepared.

The invention discloses a modified resin composition for a high-pressure-resistant and high-wear-resistant PVC (polyvinyl chloride) hose, and belongs to the technical field of PVC pipes. The sisal fibers are subjected to alkali treatment, impurities are removed and active sites are increased through insertion modification and alkali treatment of the magnesium aluminate spinel fibers, the magnesium aluminate spinel fibers improve the performance of the pipe due to the high length-diameter ratio and other characteristics of the magnesium aluminate spinel fibers, a stable enhanced network structure is formed in a PVC matrix, the surface hardness and wear resistance are improved, the pressure is shared, and the pressure resistance is improved. A bicyclo [2.2. 2] octane structure contained in the long-chain graft modifier disclosed by the invention has rigidity and steric hindrance effect, can uniformly disperse pressure to avoid breakage or excessive deformation of a molecular chain, and is coupled with an amino silane coupling agent to form a three-dimensional structure to improve pressure resistance and wear resistance. After sulfonic groups and a long-chain grafting modifier are introduced to the surfaces of the interspersed modified sisal fibers, the hydrophobic and oleophylic properties of the sisal fibers are improved, the compatibility with PVC is enhanced, agglomeration is avoided, friction is effectively resisted, and the processing fluidity of the material is improved.

The invention provides a flame-retardant modified PVC (polyvinyl chloride) plastic sheet which is formed by co-extruding a surface layer molten master batch and an inner layer molten master batch through a composite die head, the prepared flame-retardant modified PVC plastic sheet can realize self-triggering flame retardance and has self-repairing capability, and the repairing efficiency is 60-70%. Performance gradient is achieved through layered design, the high flame retardance and weather resistance of the outer layer material are combined with the toughness of the PVC matrix reserved in the inner layer, and the overall mechanical property of the material is improved; meanwhile, carboxylated CNTs and Fe < 3 + > form a Ph response dynamic cross-linked network, so that an acid source is catalyzed to decompose and cross-link while the flame retardant is rapidly released, the flame retardance of the material is improved, and the purpose of self-triggering flame retardance is achieved.

The application belongs to the field of polymer composites, and particularly relates to a synergistic flame-retardant composite material for fireproof doors and a preparation method thereof; aiming at the problem that excessive addition of a flame retardant can cause the mechanical property of a composite material to decrease; the application improves the dispersibility of nano-zinc oxide in a PVC matrix through citric acid / phytic acid composite modification, and forms a high-efficiency synergistic flame-retardant system by compounding with aluminum diethyl phosphinate and melamine cyanurate; by constructing a gradient functional structure of a high-flame-retardant region and a low-flame-retardant region, and cooperating with a co-extrusion process, the damage of the flame retardant to the mechanical property of the matrix is reduced while the overall excellent flame-retardant property of the material is ensured.

The invention belongs to the technical field of high polymer materials, and particularly relates to a preparation method of an environment-friendly stabilizer for a high-calcium PVC (polyvinyl chloride) product, which comprises the following steps: modifying calcium acetylacetonate by using an aluminate coupling agent to obtain modified calcium acetylacetonate as an auxiliary stabilizer; the environment-friendly stabilizer is obtained by mixing a calcium salt main stabilizer, namely calcium glycol maleate, a zinc salt main stabilizer, namely zinc glycol maleate, modified calcium acetylacetonate and Fischer-Tropsch wax according to a mass ratio of 15: 5: 8: 2. Through synergistic interaction of calcium acetylacetonate and a calcium-zinc main stabilizer, better thermal stability is achieved, in the reaction process of calcium acetylacetonate and allyl chloride on a PVC macromolecular chain, a PVC matrix is coated with modified calcium acetylacetonate, then heavy calcium carbonate and the PVC matrix are combined together through an aluminate group on an aluminate coupling agent, and the PVC matrix has good thermal stability. The dispersing effect of the heavy calcium carbonate and the PVC matrix is improved, and the effect of a compatilizer is achieved.

The invention relates to the technical field of high polymer materials, and particularly discloses a high-flame-retardant PVC pipe and a preparation method thereof. The high-flame-retardant PVC pipe comprises the following components in parts by weight: 100 parts of PVC resin, 10-15 parts of an inorganic flame retardant, 0.5-10 parts of a maleic anhydride grafted alpha olefin oligomer, 3-8 parts of ACR resin, 1-5 parts of a heat stabilizer, 0.5-2 parts of a lubricant and 10-30 parts of a filler. According to the present invention, through the bridge effect of the maleic anhydride grafted alpha olefin oligomer, the inorganic flame retardant is easily and uniformly dispersed in the PVC matrix, the flame retardant efficiency is completely performed, the high mechanical property is maintained, and the addition of the maleic anhydride grafted alpha olefin oligomer can significantly improve the toughness of the PVC pipe.

This invention discloses a method for preparing impact-resistant and cold-resistant polyvinyl chloride (PVC) conduit, belonging to the field of PVC material technology. In this invention, butyl rubber is complexed with dioctyl sebacate and active silica under the initiation of tert-butyl hydrogen peroxide. This complex acts as a flexible dispersed phase in the PVC matrix, effectively absorbing and dissipating impact energy and lowering the glass transition temperature of the material. This allows the conduit to maintain excellent toughness and crack resistance even at low temperatures. Furthermore, it works synergistically with impact modifiers in the system. Ethylene-vinyl acetate copolymer provides elastomer toughening, while maleic anhydride-styrene graft copolymer acts as a highly efficient compatibilizer and interfacial reinforcing agent. The compounded structure forms a toughening network, achieving toughening from molecular chain segment movement to microstructure, thus improving impact strength. Subsequent addition of reinforcing fibers of the same specification further enhances the strength of the conduit. Overall, this results in a PVC conduit with excellent strength, impact and cold resistance, and thermal properties.

The invention provides hydrotalcite for improving thermal stability and initial whiteness of PVC (polyvinyl chloride) and a preparation method of the hydrotalcite. The chemical composition of the hydrotalcite comprises M < 2 + > xM < 3 + > y (OH) 2x + 3y-x / 2 (CO3) x / 4. MH2O, wherein M < 2 + > is a divalent metal ion or a mixture of divalent metal ions and is selected from one or two of Mg < 2 + >, Ca < 2 + >, Ni < 2 + >, Zn < 2 + >, Mn < 2 + >, Cu < 2 + >, Co < 2 + >, Pd < 2 + > and Fe < 2 + >; m < 3 + > is a trivalent metal ion and is selected from one of Al < 3 + >, Ga < 3 + > and In < 3 + >; x and y are positive numbers, and the molar ratio of x to y satisfies x / y = 2.0-3.0; m is the content of crystal water, and m is 3.5-4.0. By regulating and controlling the specific surface area to be less than 20 m < 2 > / g, D50 to be less than 0.150 mu m and the grain size to be greater than or equal to 800 and combining a surface modification process, the compatibility and dispersity of the hydrotalcite and PVC are improved. The preparation method comprises the steps of raw material mixing and sanding, hydro-thermal synthesis, solid-liquid separation and washing, surface modification, drying and post-treatment, the hydrotalcite capable of improving PVC thermal stability and initial whiteness is obtained, the hydrotalcite can be uniformly dispersed in a PVC matrix, thermal decomposition is inhibited by absorbing HCl, the static aging time is prolonged, and meanwhile light scattering is reduced.

The invention discloses environment-friendly flame-retardant PVC (polyvinyl chloride) plastic and a preparation method thereof, and belongs to the technical field of flame-retardant materials. The preparation method of the environment-friendly flame-retardant PVC plastic comprises the following steps: fully blending 80-100 parts by weight of PVC matrix resin, 10-20 parts by weight of a phosphorus-containing composite flame retardant, 20-30 parts by weight of a vegetable oil modified plasticizer and 1-5 parts by weight of a lubricant to form a mixture, and mixing the mixture in an internal mixer at 180-190 DEG C for 10-15 minutes to obtain the environment-friendly flame-retardant PVC plastic. And the phosphorus-containing composite flame retardant and the vegetable oil modified plasticizer are combined for use, so that the PVC plastic has good flame retardance, and meanwhile, the mechanical property is also guaranteed.

The invention discloses an ultraviolet-weathering-resistant PVC (polyvinyl chloride) mask and application thereof in a vehicle body sticker, and relates to the technical field of macromolecular PVC masks for vehicle body stickers. The ultraviolet weathering resistant PVC mask is prepared from the following raw materials in parts by mass: 100 parts of PVC resin, 30-60 parts of a plasticizer, 2-5 parts of a heat stabilizer, 0.5-3 parts of an ultraviolet light absorber, 0.2-1.5 parts of an antioxidant, 5-20 parts of a filling agent and 1-10 parts of a coloring agent. Through compatibility optimization of the ultraviolet light absorber with a specific brand-new structure and the PVC matrix, the heat stabilizer and the antioxidant are matched to form a synergistic protection system, PVC molecular chain degradation caused by outdoor ultraviolet radiation can be effectively inhibited, and the mask can be used outdoors for a long time, so that the service life of the mask is prolonged, and the service life of the mask is prolonged. The aging attenuation trend of the appearance (such as color fading, yellowing, gloss loss, cracks and pulverization) and the performance is obviously slowed down, and the ultraviolet weathering resisting effect is more durable.

The application discloses a PVC protective glove and a preparation method thereof and belongs to the technical field of PVC gloves. The method comprises the following steps: step 1: taking PVC paste resin as a base material, adding a viscosity reducer, a plasticizer, a modified filler, a liquid barium-zinc stabilizer, water-based PU glue and deionized water, stirring for 5-8 min, then sealing and aging at 45 DEG C for 1-2 h to obtain aged glue slurry; step 2: pre-treating the surface of a ceramic hand mold, spraying polytetrafluoroethylene release agent after drying, drying again, then vertically immersing in the aged glue slurry, demolding after curing and cooling, then post-treating and drying to obtain the PVC protective glove. The application realizes the uniform dispersion and strong interface combination of the modified filler in the PVC matrix by precisely controlling the surface modification structure of the filler and the amount of the filler in the formula, and effectively improves the mechanical properties and heat aging resistance of the glove.

The invention relates to a composite coating copper electrode for improving the performance of a C2 product prepared by reducing carbon dioxide through electro-catalysis and a preparation method of the composite coating copper electrode, and belongs to the technical field of catalysis and energy. The core of the invention is to provide a synergistic modification strategy for simultaneous coating of micromolecules and polymers. Specifically, benzotriazole (BTA) and polyvinyl chloride (PVC) are mixed, and the copper surface is coated with the mixture at a time to form the composite coating. Through the synergistic effect of BTA and PVC, key reaction intermediates (such as * COOH and * COCOH) can be effectively stabilized, an electronic structure is optimized, and C-C coupling is remarkably promoted. Experiments show that: Cu-BTAamp; the PVC electrode is arranged in an H-type electrolytic tank, and the Faraday efficiency of the product can be improved from 36% to 71.0 + / -5.6%. In addition, the PVC matrix can effectively package and fix BTA, and the long-term stability of a catalytic system is greatly enhanced. The method is simple, low in cost and high in universality, and a new technical approach is provided for efficient and stable reduction preparation of high-value multi-carbon fuel.

The invention discloses an anti-impact modifier and application thereof in PVC (polyvinyl chloride) pipes, and mainly relates to the technical field of polymeric high-molecular compounds. Compared with the prior art, the impact-resistant modifier is applied to preparation of the PVC pipe and can synergistically improve the impact resistance and deformation resistance of the PVC pipe, methyl acrylate is polymerized on the surface of polytetrafluoroethylene to form a grafted copolymer with a core-shell structure, and polymethyl acrylate on the outer layer has good film-forming property, so that the PVC pipe has good impact resistance and deformation resistance. Inorganic fibers and other components can be adhered to the surface of the polytetrafluoroethylene-methyl acrylate core-shell structure grafted copolymer, and when the polytetrafluoroethylene-methyl acrylate core-shell structure grafted copolymer is added to preparation of a PVC matrix, impact stress can be fully dispersed, and pipe deformation and even breakage caused by local excessive accumulation of stress are avoided. The inorganic glass fiber is further added, the bearing load is improved by enhancing the strength, the water flow impact force and the external pressure are better resisted, and finally the purpose of improving the impact resistance and the deformation resistance of the pipe is achieved.

The invention provides a rare earth antibacterial mildew-proof formaldehyde-removing PVC (polyvinyl chloride) laminating material which comprises a wear-resistant layer, a PVC functional layer, a printing layer and a bonding layer from top to bottom, and the PVC functional layer is formed by calendering or blow molding a PVC mixture containing rare earth elements. According to the invention, the modified rare earth element and the functional additive are arranged in the PVC matrix, so that multiple functions of antibiosis, mildew prevention and formaldehyde removal are integrated, the functions are lasting, illumination is not depended on, and meanwhile, an existing production line is perfectly compatible.

The application belongs to the technical field of threading pipe, and discloses a PVC threading pipe, a preparation method and application thereof, the PVC threading pipe comprises the following raw materials by weight: 100 parts of PVC resin, 8-14 parts of flame retardant, 12-18 parts of reinforcing filler, 0.6-1.5 parts of lubricant and 0.8-1.2 parts of antioxidant; wherein the flame retardant comprises modified chitin and aluminum hydroxide uniformly dispersed in a carrier; and the reinforcing filler is obtained by mixing modified basalt fiber, vinyl silicone oil and silicone rubber; the PVC threading pipe is provided with a specific flame retardant system and a reinforcing filler system, efficient cooperation of the flame retardation performance and the mechanical performance is realized, the flame retardant efficiently plays a flame retardation role, the reinforcing filler fully improves the mechanical performance, and both do not damage the processing performance and the structural stability of the PVC matrix, so that the PVC threading pipe simultaneously has excellent flame retardation, compression resistance and impact resistance and processing applicability.

The invention relates to the technical field of PVC cable conduits, in particular to a flame-retardant high-impact calcium carbonate master batch, a PVC cable conduit and a preparation method thereof.The preparation method of the flame-retardant high-impact calcium carbonate master batch comprises the steps that calcium carbonate, zinc borate and stearic acid are pretreated and put into a stirring machine at the same time to be mixed and modified for the first time; diluting a silane coupling agent, and adjusting the pH value to obtain a silane coupling agent solution; drying the first coated calcium carbonate to obtain second coated calcium carbonate; spraying a silane coupling agent solution on the surface of the second coating calcium carbonate by using a spraying device, carrying out second mixing modification, drying and crushing to obtain the flame-retardant high-impact calcium carbonate master batch; the calcium carbonate and the zinc borate in the flame-retardant high-impact calcium carbonate master batch have good dispersibility, so that the dispersion stability of the calcium carbonate and the zinc borate in a PVC matrix is improved, and the problem that the impact resistance and the flame retardance of the PVC cable conduit cannot be further improved due to poor dispersibility of the calcium carbonate and the zinc borate in the existing flame-retardant calcium carbonate is solved.

The invention belongs to the technical field of threading pipes, and discloses a PVC threading pipe and a preparation method and application thereof, the PVC threading pipe comprises the following raw materials by weight: 100 parts of PVC resin, 8-14 parts of a flame retardant, 12-18 parts of a reinforcing filler, 0.6-1.5 parts of a lubricant, and 0.8-1.2 parts of an antioxidant; wherein the flame retardant comprises modified chitin and aluminum hydroxide uniformly dispersed in the carrier; the reinforcing filler is obtained by mixing modified basalt fiber, vinyl silicone oil and silicone rubber. According to the PVC threading pipe, through a specific flame retardant system and a reinforcing filler system, efficient synergy of the flame retardant property and the mechanical property is achieved, the flame retardant efficiently plays a flame retardant role, the reinforcing filler fully improves the mechanical property, and the flame retardant and the reinforcing filler do not damage the processing property and the structural stability of a PVC matrix; the PVC threading pipe has excellent flame retardance, compression resistance, impact resistance and processing applicability at the same time.

The application discloses a PVC film resistant to ultraviolet weathering and application of the PVC film in a car body sticker, and relates to the technical field of polymer PVC car body sticker films.The PVC film resistant to ultraviolet weathering is prepared from the following raw materials in parts by mass: 100 parts of PVC resin, 30-60 parts of plasticizer, 2-5 parts of heat stabilizer, 0.5-3 parts of ultraviolet absorber, 0.2-1.5 parts of antioxidant, 5-20 parts of filler and 1-10 parts of colorant.The application optimizes the compatibility of the ultraviolet absorber with the PVC matrix through a specific novel structure, and forms a synergistic protection system by matching the heat stabilizer and the antioxidant, so that the degradation of the PVC molecular chain caused by outdoor ultraviolet irradiation can be effectively inhibited, the aging and attenuation trend of the appearance (such as discoloration, yellowing, loss of gloss, cracking and powdering) and performance of the film in long-term outdoor use is obviously slowed down, and the ultraviolet weathering resistance effect is more durable.

The invention discloses a preparation method of a modified PVC recycled material, and belongs to the technical field of plastic recycling. Comprising the following raw materials in parts by weight: 80-90 parts of a pretreated PET reclaimed material, 12-18 parts of lignin, 5-15 parts of a modifier, 6-8 parts of an antioxidant and 2-4 parts of a processing aid. Wherein the pretreated PET reclaimed material has fewer impurities; lignin is added, so that the compatibility with a PVC matrix is good, the mechanical property, the antibacterial property and the flame retardant property of the recycled material can be enhanced, and the recycled material is environment-friendly and renewable; wherein the modifier can remarkably improve the heat resistance, antibacterial property, flame retardance and mechanical property of the recycled material, and the recycled material is stable in performance and not prone to falling off. Therefore, the prepared modified PVC recycled material is excellent in mechanical property, has stable and efficient heat resistance, antibacterial property and flame retardance, recycles waste materials, is green and environment-friendly, and has important application value in the technical field of plastic recycling.

This utility model relates to an extrusion molding device for moisture-proof and antibacterial PVC decorative panels, aiming to solve the technical problem that current extruders struggle to achieve uniform dispersion of nano-level moisture-proof and antibacterial materials in a PVC matrix, affecting material performance and failing to meet the processing requirements of special functional materials. The device includes: an extrusion mechanism with a hot melt box installed at one end and a molding mechanism connected to the other end via an extrusion pipe; and a dispersion mechanism located at the top of the hot melt box for uniform mixing of the moisture-proof and antibacterial materials with the PVC matrix. This utility model simultaneously injects the PVC matrix and moisture-proof and antibacterial nanomaterials into the mixing box through different flow channels, avoiding the material stratification problem caused by traditional single-inlet systems. It ensures initial mixing uniformity from the feeding source and uses a drive motor to drive a high-speed rotating drive disc to disperse and mix the simultaneously added materials, forming a nano-level monodisperse state in the PVC melt, thus improving the quality of the extrusion molding of moisture-proof and antibacterial PVC decorative panels.

The invention discloses a PVC pipeline based on phase change energy storage and a preparation method, the PVC pipeline comprises a pipeline main body, the pipeline main body comprises a PVC matrix, an energy storage filler and a thermal insulation layer, the PVC matrix comprises a matrix inner layer, a matrix outer layer and connecting ribs which are formed through extrusion, and the matrix inner layer and the matrix outer layer are connected through a plurality of connecting ribs. A plurality of cavities are formed between the base body inner layer and the base body outer layer, the adjacent cavities are separated through connecting ribs, the cavities are filled with the energy storage filler to form a phase change energy storage layer, and the heat preservation layer is fixed to the outer portion of the base body outer layer. According to the PVC pipeline, through multi-layer structural design, material modification and a special process, integration of fluid conveying and heat energy storage is achieved, the energy storage efficiency and the structural stability are improved, the system design is simplified, and the cost is reduced.

This invention discloses a PVC conduit and its preparation method, belonging to the field of polymer materials technology. By incorporating functionalized grafted elastomers, this invention significantly improves toughness while effectively inducing numerous crazing and shear bands in the matrix at low temperatures, absorbing impact energy and thus significantly improving the brittle fracture problem of PVC-U pipes under low-temperature conditions. Furthermore, the modified functional filler not only significantly improves the compatibility with PVC resin and elastomers, but also utilizes needle-like nano-hydroxyapatite combined with silicon carbide to form a stable three-dimensional network structure in the system, further hindering the intrusion of oxygen and heat, thereby delaying material aging. Due to the overlapping effect of needle-like hydroxyapatite and the rigidity point effect of silicon carbide, it significantly strengthens the PVC matrix, thereby improving the overall performance of the PVC conduit, achieving a balance between rigidity and toughness, and possessing higher application value.

The invention discloses a preparation method of a long-acting wear-resistant PVC (polyvinyl chloride) non-slip mat, and belongs to the field of high polymer material processing. The method comprises three steps of raw material pretreatment, mixing and modification, and compression molding. According to the invention, plant powder, glass fiber and other reinforcing fillers are introduced, and a silane coupling agent and a compatilizer are adopted for interface modification, so that the compatibility and interface bonding force of the fillers and a PVC matrix are improved, and the PVC non-slip mat with excellent wear resistance for a long time is prepared by optimizing molding process conditions. The method is easy and convenient to operate, environmentally friendly and suitable for large-scale industrial production.

The invention belongs to the field of solid recycling and polymer composite materials, and particularly relates to a preparation method of a PVC composite material based on waste fan blades, an obtained product and application. The method comprises the following steps: (1) preheating part of waste fan blade powder, adding a modifier, and stirring at a high speed to obtain modified fan blade powder 1; (2) preheating the residual waste fan blade powder, then adding a liquid coupling agent, and stirring at a high speed to obtain modified fan blade powder 2; and (3) mixing the modified fan blade powder 1 and the modified fan blade powder 2, then adding the mixed powder, a stabilizer, PE wax, titanium dioxide and an impact modifier into PVC resin, blending and plasticizing, and then carrying out hot press molding. According to the invention, a technical system of'modification technology + coupling agent modification technology + MBS / ACR synergistic toughening 'is constructed, and chemical bonding with a PVC matrix is enhanced through combined pretreatment of WFRP, meanwhile, the prepared material improves the addition amount of fan blade powder, the use of calcium carbonate is avoided, the synergism of light weight and high performance is realized, the density is reduced by 7.1%, the tensile strength is improved by 26.4% (up to 55.3 MPa), and the service life of the fan blade powder is prolonged. And the vicat softening temperature is increased to 90.3 DEG C.

The application relates to a high-flame-retardant electronic connecting wire and a preparation method thereof, and belongs to the technical field of high polymer materials. The electronic connecting wire is composed of a wire and a surface flame-retardant protective layer, wherein the components of the flame-retardant protective layer are as follows: modified phosphorus-silicon flame retardant 7.5-10 wt%, plasticizer 14-18 wt%, heat stabilizer 1.7-2.2 wt%, antioxidant 0.12-0.16 wt% and lubricant 0.9-1.3 wt%, and the rest is PVC resin; the modified phosphorus-silicon flame retardant is synthesized by synthesizing a phosphorus oxychloride intermediate 1 with a double spiro ring structure from pentaerythritol and phosphorus oxychloride, carrying out amine-ester exchange between terminal amino polydimethylsiloxane and ketone-based diethyl malonate to prepare an intermediate 2 containing terminal amino groups, and then reacting the intermediate 2 with active phosphorus oxychloride of the intermediate 1 to form a chain-shaped macromolecular phosphorus amide compound, so that in-situ toughening, migration inhibition and carbon net flame retardation are simultaneously realized in the PVC matrix.

The invention relates to a PVC (polyvinyl chloride) conveyor belt surface layer material with high wear resistance and a preparation method thereof, and the surface layer material comprises the following components in parts by weight: 100 parts of PVC paste resin; 5 to 15 parts of SBR emulsion (based on solid content); 3 to 10 parts of BR emulsion (based on solid content); and 0.3 to 1 part of maleic anhydride grafted polyethylene. Through the synergistic effect of the SBR emulsion and the BR emulsion, the wear resistance and the dynamic friction coefficient of the surface layer material are improved, the material is endowed with good elasticity and buffering capacity, the running stability and the low-temperature flexibility of a conveying belt can be possibly improved, and the risk of low-temperature embrittlement is reduced. And the maleic anhydride grafted polyethylene compatilizer is used for improving interface bonding, so that the interface bonding force between the PVC matrix and the rubber dispersion phase is enhanced, a blending system is more stable, phase separation and interface stripping are not easy to occur, and a surface layer material can more effectively resist friction and abrasion of materials, so that the service life of the conveying belt is remarkably prolonged.

This invention relates to the field of PVC recycled plastics technology, and discloses a PVC recycled polyvinyl chloride plastic and its preparation method, including a recycled PVC matrix phase, a gradient interface layer, and a woven carbon fiber reinforcement layer. The invention forms a dynamic cross-linking network inside the recycled PVC matrix through a thermally reversible covalent cross-linking agent, which effectively compensates for the strength loss caused by molecular chain breakage in the recycled PVC. At the same time, a tensile rheological plasticizing device is used to make the particulate filler fiberized in situ, forming a micro-fiber reinforcement network in the matrix. The macro-woven carbon fiber layer and the micro-in situ fiberized network constitute a "double network reinforcement" structure.

The invention discloses a CNT / CaCO3 composite material and application thereof in electromagnetic shielding, the CNT / CaCO3 composite material is prepared by growing co-activated and modified nano calcium carbonate on the surface of CNT in situ, the material and PVC are prepared into a PVC / CNT / CaCO3 electromagnetic shielding film, the dispersity of the CNT / CaCO3 composite material is improved while the dispersity of the nano calcium carbonate is improved, and the electromagnetic shielding performance of the CNT / CaCO3 composite material is improved. Therefore, the dispersity of the CNT / CaCOs composite material in a PVC matrix is synergistically improved, and the electromagnetic shielding property and mechanical property of the PVC composite material are enhanced.

The invention relates to the technical field of plastics, and particularly discloses high-strength PVC foam and a preparation method thereof. The high-strength PVC foam comprises the following raw materials in parts by weight: 100 parts of SG-5 PVC resin, 15-18 parts of maleic anhydride grafted polyvinyl chloride coated magnesium citrate, 4-5 parts of a calcium-zinc stabilizer, 8-10 parts of a plasticizer and 5-6 parts of butadiene styrene rubber. The maleic anhydride grafted polyvinyl chloride coated magnesium citrate salt is prepared from maleic anhydride grafted polyvinyl chloride and magnesium citrate salt by adopting a melt blending method. According to the preparation method, the strength of the prepared PVC foam is improved by improving the dispersity of the magnesium citrate salt in a PVC matrix.

The present application relates to a kind of PVC conveying belt surface layer material with high wear resistance and its preparation method, the component of the surface layer material includes by weight parts: PVC paste resin: 100 parts;SBR emulsion (by solid content): 5-15 parts;BR emulsion (by solid content): 3-10 parts;Maleic anhydride grafting polyethylene: 0.3-1 part.The present application improves the wear resistance and dynamic friction coefficient of surface layer material by the synergistic effect of SBR emulsion and BR emulsion, gives material good elasticity and buffering capacity, and possibly improves the running stability of conveying belt and the flexibility at low temperature, reduces the risk of low temperature brittle fracture.And by means of maleic anhydride grafting polyethylene compatibilizer improves interface bonding, enhances the interface bonding force between PVC matrix and rubber dispersed phase, makes the blending system more stable, not easy to phase separation and interface peeling, so that surface layer material can more effectively resist the friction and wear of material, thereby significantly prolong the service life of conveying belt.