1206 results about "Chloride vinyl" patented technology

The invention discloses a high-barrier polycrystalline silicon packaging film and a preparation method thereof, and relates to the technical field of packaging materials. The high-barrier polycrystalline silicon packaging film consists of a polyester film carrier and functional slurry, the functional slurry is prepared from the following raw materials in parts by weight: 15 to 25 parts of ethylene-vinyl alcohol copolymer, 10 to 18 parts of polyvinylidene chloride, 5 to 10 parts of modified nano montmorillonite, 8 to 15 parts of modified polylactic acid, 3 to 6 parts of tributyl citrate, 1 to 3 parts of antioxidant 1010, 1 to 3 parts of ultraviolet light absorber UV-531, 0.5 to 1.5 parts of nucleating agent NA-11, 1 to 2 parts of silane coupling agent KH-550 and 3 to 7 parts of modified silicon dioxide aerogel; 2 to 5 parts of vinyl trimethoxy silane, 1 to 3 parts of nano silver and 20 to 30 parts of deionized water. The high-barrier polycrystalline silicon packaging film has excellent barrier performance, and can effectively block oxygen, water vapor and the like. The polycrystalline silicon packaging film is good in mechanical performance, not prone to damage, antibacterial, antioxidant and anti-ultraviolet, the quality guarantee period of polycrystalline silicon can be prolonged, the product quality can be guaranteed, and the polycrystalline silicon packaging film has great application value in the field of polycrystalline silicon packaging.

The invention relates to an impact-resistant chlorinated polyvinyl chloride composite material and a preparation method thereof, and belongs to the technical field of polymer composite materials. The composite material comprises the following components: 100 parts of CPVC resin, 6.5 to 9.5 parts of a modified impact modifier, 2.6 to 3.2 parts of a heat stabilizer, 1.5 to 2 parts of a lubricant, 1.2 to 1.6 parts of a processing aid, 0.2 to 0.25 part of a light stabilizer and 8 to 11 parts of a filler, the modified impact modifier takes a POSS cage structure as a core, a branch chain sequentially contains thioamide-secondary amine-tertiary amine structures, a polarity gradient is formed and fully extends into a macromolecular chain of CPVC to transmit and dissipate impact energy, meanwhile, the amine structure interacts with chlorine groups in a molecular chain of CPVC to form molecular anchoring, expansion of crazes is inhibited, and the impact strength of the CPVC is improved. The continuity and the stability of a bonding interface are maintained, so that the composite material keeps relatively high mechanical strength and thermal stability.

The invention relates to the field of cables, and discloses a modified polyvinyl chloride composite material for cables and a preparation method thereof.The composite material comprises low-density polyethylene, polyvinyl chloride, ethylene-vinyl acetate copolymer, nitrile rubber, modified graphene oxide, modified nano calcium carbonate and auxiliaries; the modified graphene oxide is prepared by reacting acylating chlorination of graphene oxide with an anti-aging derivative, the anti-aging derivative is prepared by reducing a benzoxazole-containing intermediate generated by a reaction of 2-amino-4-bromophenol and 4-cyanobenzaldehyde to obtain an aminated benzoxazole-containing intermediate, then the aminated benzoxazole-containing intermediate reacts with p-phenylenediamine, and then the product reacts with 3-(3, 4-dichlorophenyl)-1, 2, 3-triazole-3-one to obtain the anti-aging graphene oxide. 2, 5-di-tert-butyl-4-hydroxyphenyl) propionyl chloride is subjected to a reaction to prepare the product. And the modified nano calcium carbonate is prepared by reacting phosphonitrilic chloride trimer with an amino silane coupling agent and 2-amino benzoxazole-5-borate and then grafting on the surface of the nano calcium carbonate. The composite material prepared by the invention has excellent flame retardance, heat resistance and long-acting oxidation resistance.

The invention discloses an HPVC power cable protection pipe and a preparation method thereof, and relates to the technical field of cable protection pipes. The HPVC power cable protection tube is at least prepared from the following raw materials in parts by weight: 100 parts of high-strength polyvinyl chloride, 35 to 45 parts of epoxy acrylate rubber, 5 to 8 parts of vinyl chloride-g-acrylate copolymer, 8 to 12 parts of epoxidized soybean oil, 3 to 5 parts of calcium-zinc composite stabilizer, 5 to 15 parts of modified hydrotalcite, 0.1 to 0.5 part of beta-diketone, 0.8 to 1.5 parts of calcium stearate and 10 to 20 parts of flame retardant. 12 to 15 parts of modified nano calcium carbonate, 5 to 8 parts of talcum powder, 0.6 to 1.2 parts of antioxidant, 1 to 2 parts of anti-aging agent 4010 and 0.5 to 1.5 parts of ultraviolet light absorber UV531; the modified hydrotalcite is obtained by adding a mixed solution of calcium nitrate and lanthanum nitrate, a sodium hydroxide solution and a sodium bicarbonate solution into a lauryl sodium sulfate solution, mixing and aging, and then carrying out a post-treatment process. The HPVC power cable protection tube prepared by the invention has relatively high strength, good mechanical properties, weather resistance and cold resistance, and long service life.

The invention relates to the technical field of rubber-plastic composite flame-retardant materials, and provides a graphite rubber-plastic composite flame-retardant material and a preparation method thereof.The preparation method comprises the following processes that nitrile rubber, polyvinyl chloride, dioctyl phthalate, modified expandable graphite, a stabilizer, sulfur and an anti-aging agent are added into a high-speed mixer and mixed to be uniform, and a premix is obtained; and feeding the premix into a double-screw extruder, and carrying out melt blending, extrusion and vulcanization to obtain the composite flame-retardant material. The preparation method has the beneficial effects that the modifier is combined with the expansible graphite and compounded with the nitrile rubber, the polyvinyl chloride and other base materials, so that the flame retardant property and the mechanical property of the prepared composite material are remarkably improved.

This invention relates to a method for using a low-content ruthenium-based catalyst modified with nitrogen and oxygen ligands in the hydrochlorination of acetylene. The invention utilizes 2-pyridine carboxylate as a ligand, commercial activated carbon as a support, trace amounts of ruthenium as the main active component, and water as a solvent. An improved synthesis procedure yields a low-content ruthenium-based catalyst with ruthenium ions coordinated by a modifier and commercial activated carbon as a support, significantly improving catalyst performance while reducing ruthenium content. This catalyst exhibits high activity and vinyl chloride selectivity in the fixed-bed hydrochlorination of acetylene to vinyl chloride, and its low cost makes it highly valuable for industrial applications. The ruthenium loading is 0.1%, and the reaction gas space velocity is 170 h⁻¹. ‑1 V (C2H2) / V (HCl) With a ratio of 1:1.05 and a reaction temperature of 180℃, the acetylene conversion rate can reach 84.3%, the vinyl chloride selectivity is greater than 99%, and the activity remains basically unchanged within 10 hours.

The invention provides an anti-aging medium and low voltage polyvinyl chloride cable, which comprises an outer layer insulation skin, sealing rubber sleeves are glued on two sides of the outer layer insulation skin, a protection assembly is arranged on the inner wall of the outer layer insulation skin, the protection assembly comprises a separation rubber sheet, the separation rubber sheet is arranged on the inner wall of the outer layer insulation skin, and the separation rubber sheet is arranged on the inner wall of the outer layer insulation skin. A liquid bin is reserved between the two sets of separation films, the liquid bin is filled with a sodium silicate solution, a separation sleeve is arranged on the inner wall of the outer layer insulation skin, a liquid layer is embedded in the separation sleeve, and a repairing assembly is embedded in the liquid layer. When the outer insulating layer is damaged by external force, the isolation triggering protective layer is accurately broken to release aluminum oxide powder and a sodium silicate solution, the aluminum oxide powder and the sodium silicate solution are mixed and then rapidly react to generate a high-insulation and high-strength aluminosilicate hardened body, and sealing and leaking stoppage, structural reinforcement and flame retardance enhancement of a damaged part are synchronously achieved; and self-repairing can be completed without manual intervention.

The invention relates to the technical field of packaging materials, and discloses a high-barrier multilayer co-extrusion composite film which sequentially comprises an inner layer, a first bonding layer, a first barrier layer, a second bonding layer, a second barrier layer, a third bonding layer and an outer layer from bottom to top. And the second barrier layer is a nano silicon dioxide modified polyvinyl alcohol layer. The two different barrier layers are arranged, the first barrier layer has a good barrier effect on gas, the second barrier layer has outstanding barrier performance on water vapor, and the two barrier layers have a synergistic effect, so that the comprehensive barrier performance of the composite film on oxygen, water vapor, peculiar smell and the like is remarkably improved, the shelf life of a packaged product can be effectively prolonged, and the packaging cost is reduced. According to the high-barrier film, the high-barrier property is ensured, the quality and the performance of a product are ensured, and the use of expensive materials and a complex production process is avoided and the production cost is reduced by reasonably selecting each layer of material and optimizing the structural design on the premise of ensuring the high-barrier property.

The invention provides a calcium sulfate whisker reinforced and toughened polyvinyl chloride pipe and a preparation method thereof, and belongs to the technical field of polyvinyl chloride pipes. The plastic comprises the following components in parts by mass: 100 parts of polyvinyl chloride resin, 5-15 parts of calcium sulfate whiskers, 0.5-3 parts of a coupling agent, 2-4 parts of a heat stabilizer, 0.5-1.5 parts of a lubricant and 1-3 parts of a processing aid, wherein the adding amount of the calcium sulfate whiskers is 5-15% of the mass of the polyvinyl chloride resin. The coupling agent is used for treating the calcium sulfate crystal whiskers, so that the treated calcium sulfate crystal whiskers can be infiltrated by the polyvinyl chloride matrix, and a good interface layer is formed between the calcium sulfate crystal whiskers and the polyvinyl chloride matrix; the calcium sulfate whisker treated by the silane coupling agent can play a role of a filling agent and impact resistance, replaces calcium carbonate, achieves a filling effect, can improve the strength, hardness, dimensional stability and heat resistance of the pipe, and can reduce the production cost due to the fact that the calcium sulfate whisker is a low-price environment-friendly material.

The application discloses a kind of cable filling rope with halogen-free flame-retardant composite material and preparation method thereof, belong to composite material technical field.The application is used to solve the technical problems of poor cell quality, poor mechanical properties and flame-retardant properties of filling rope material in the prior art.A kind of preparation method of cable filling rope with halogen-free flame-retardant composite material includes the following steps: low-density polyethylene, high-density polyethylene, hybrid flame-retardant resin and modified nucleating agent are uniformly mixed to obtain foaming filling rope material;Foaming filling rope material is melt extruded to obtain cable filling rope with halogen-free flame-retardant composite material.The hybrid flame-retardant resin is obtained by reaction of polycyclic epoxy group cyclotriphosphazene, vinyl chloride methyl methacrylate copolymer, mixed inorganic powder, etc.;The modified nucleating agent is obtained by intercalating talc powder with modified diamide nucleating agent.The foaming filling rope material prepared by the application has the characteristics of high cell quality, excellent mechanical properties and flame-retardant properties.

The invention discloses a rigid polyvinyl chloride pipe and a preparation method thereof, and relates to the technical field of materials. The rigid polyvinyl chloride pipe comprises the following raw material components in parts by weight: 80-90 parts of polyvinyl chloride with an ultrahigh polymerization degree; 10 to 20 parts of polyvinyl chloride with ultralow polymerization degree; 2 to 4 parts of nano boehmite; 4-5 parts of a stabilizer; 8-12 parts of a plasticizer; 0.6 to 1.2 parts of a lubricant; 15 to 25 parts of a filling agent; 3-5 parts of nuclear titanium dioxide; the polymerization degree of the polyvinyl chloride with the ultrahigh polymerization degree is 1500 to 1800; the polymerization degree of the polyvinyl chloride with the ultralow polymerization degree is 600 to 800. The rigid polyvinyl chloride tube disclosed by the invention has excellent processability, thermal stability, impact resistance, flame retardance, insulating property and surface glossiness.

The invention discloses a method for synthesizing a dichloroacetyl compound, which comprises the following steps: tetrachloroethylene and an acid are subjected to an addition reaction at 100-200 DEG C to obtain an adduct, then the adduct is subjected to an acidolysis, hydrolysis or alcoholysis reaction to obtain the dichloroacetyl compound, the acid for the addition reaction is at least one of sulfuric acid, trifluoromethanesulfonic acid, methanesulfonic acid and phosphoric acid, and the acid for the alcoholysis reaction is at least one of sulfuric acid, trifluoromethanesulfonic acid, methanesulfonic acid and phosphoric acid. The molar ratio of the tetrachloroethylene to the acid is 1: (1-10). By controlling the types of acids and increasing the temperature of the addition reaction, the addition reaction of tetrachloroethylene and acids in the absence of a catalyst is realized. Double bonds of tetrachloroethylene and hydrogen protons are subjected to an addition reaction in a strong acid environment to form a cationic intermediate, then the cationic intermediate is combined with acid radical anions to form an adduct, and the adduct intermediate is high in activity, unstable and free of separation and can be directly subjected to a hydrolysis reaction, an acidolysis reaction or an alcoholysis reaction with another substrate (such as water, acid or alcohol) respectively. The synthesis of dichloroacetyl series compounds is realized, and the route has universality and diversity.

The invention relates to the field of high polymer materials, and particularly discloses a high-oxygen-barrier moisture-barrier PE film and a process. The high-oxygen-barrier moisture-barrier PE film comprises a corona layer, a barrier layer and a heat sealing layer which are connected in sequence, the barrier layer comprises the following raw materials in parts by weight: 90-95 parts of polyethylene and 5-10 parts of polyvinylidene chloride, and the heat sealing layer is made of a polyethylene material; in addition, the preparation method provided by the invention has the advantages that the oxygen and moisture resistance of the polyethylene single film is improved, and meanwhile, the printing requirement is met.

The present disclosure relates to a flexible multi-layered material. An embodiment consistent with the disclosure has a plurality of poly(vinyl chloride)—PVC—layers, wherein at least one of the plurality of PVC layers is a foam layer, wherein each of the layers of the plurality of PVC layers comprises up to 60% (w / w) of a phthalate-free plasticizer, and wherein the phthalate-free plasticizer is selected from the group consisting of: phosphate, trimellitate, adipate, citrate, sebacate, polyester, vegetable oil, and mixtures thereof, and wherein the solubility of the phthalate-free plasticizer in the PVC is at least 13 (J·cm−3)1 / 2.

The invention relates to the technical field of cable manufacturing, in particular to an extrusion device and method for polyvinyl chloride cable material production, and the extrusion device comprises an extruder, a blanking hopper fixedly mounted on the extruder, and a fan connected with the blanking hopper; the discharging hopper comprises a feeding bin and a discharging bin, the partition plate is fixedly mounted on the feeding bin; the discharging assembly is used for controlling discharging of materials in the feeding bin, and the premixing bin is used for premixing the materials; and a blanking bin. According to the cable material blanking device, the sliding rail drives the motor to move to different positions, blanking of different cable materials can be achieved, blanking is conducted through transmission of the gear, the blanking amount of the cable materials can be accurately controlled, and the blanking effect on the cable materials is good.

To provide a laminate embossing / debossing device capable of performing distinct embossing or debossing on laminates composed of multiple sheet materials.SOLUTION: A laminate embossing / debossing device 100 comprises a metal upper mold 20 having a convex pattern 22 that forms a pattern with recesses on the upper surface of a laminate 10 composed of a first vinyl chloride sheet material 10A and a second vinyl chloride sheet material 10B, a metal lower mold 30 having a recessed pattern 32 formed on the bottom surface of the laminate 10, corresponding to the convex pattern 22 with a pattern formed by convex portions, a mold drive unit 40 that causes the upper mold 20 and the lower mold 30 to clamp the laminate 10 by moving at least one of the upper mold 20 and the lower mold 30 toward or away from the other, and a high-frequency voltage application section 50 that applies high-frequency voltage to the upper mold 20 and the lower mold 30 in a state of clamping the laminate body 10.SELECTED DRAWING: Figure 1

The application discloses a mineral-based easily-recyclable compostable water-barrier coating and a preparation method thereof, and belongs to the technical field of paper-based packaging materials. The coating is formed by a biodegradable film-forming system and a hierarchical lamellar mineral system containing three different scales and morphologies. The mineral system contains specific morphology and size of lamellar kaolin, non-asbestos grade lamellar talc and fully exfoliated sodium montmorillonite. The mineral lamella forms a dense parallel spread barrier path in the coating through a specific coating and drying solidification process, and combines a pH value responsive reversible cross-linking system to achieve excellent water vapor and oxygen barrier properties, water resistance and oil resistance at a low dry weight of 8-15 g / m2. The coating system does not contain polyvinylidene chloride and perfluoro and polyfluoro alkyl substances. The paper-based material coated with the coating is easily defibered and recycled under standard alkaline warm water conditions, and the fiber recovery rate is high, and meanwhile, the whole material meets the industrial composting requirements.

The invention relates to the technical field of flame retardants, and particularly discloses a polyvinyl chloride environment-friendly efficient flame retardant and a preparation method thereof. The polyvinyl chloride environment-friendly efficient flame retardant is prepared from the following raw materials in parts by mass: 1.12 to 2.62 parts of composite flame retardant and 15 to 18 parts of polyvinyl chloride, wherein the composite flame retardant is formed by compounding layered double hydroxide and modified graphene oxide; in addition, the preparation method disclosed by the invention has the advantages of environmental friendliness and flame retardance of the polyvinyl chloride flame retardant.

The invention discloses a production process of toughened polyvinyl chloride particles, and relates to the technical field of high polymer materials. The production process comprises the following steps: firstly, adding hydrogenated butadiene-acrylonitrile rubber into a double-roller open mill for plastifying, then sequentially adding polyvinyl chloride resin, nano cellulose crystals, mixed microspheres, stearic acid, a synergist, a calcium-zinc composite stabilizer and MBS resin, premixing, then adding the mixture into a double-screw extruder for melting and plastifying, then carrying out secondary vulcanization treatment, and finally, carrying out extrusion molding, thus obtaining the high-strength polyvinyl chloride composite material. And finally, granulating and drying to obtain the toughened polyvinyl chloride particles. The synergist can promote the dispersion of stress and improve the mechanical properties of the polyvinyl chloride material; meanwhile, the mixed microspheres can absorb and disperse energy and limit thermal motion of polyvinyl chloride molecular chains. Therefore, the toughened polyvinyl chloride particles prepared by the invention have more excellent impact resistance, tensile strength, high-temperature resistance and low-temperature resistance, and have a wider application prospect.

The invention provides a polyvinylidene chloride resin emulsion with excellent barrier property as well as a preparation method and application thereof. A barrier property accelerant is added in the preparation method, and the preparation method comprises the following steps: preparing a monomer pre-emulsion: mixing and stirring vinylidene chloride, a comonomer, an emulsifier and water to obtain the monomer pre-emulsion; seed emulsion polymerization: mixing a seed monomer, a seed emulsifier and water, adding an initiator, and reacting to obtain a seed emulsion; polymerizing polyvinylidene chloride emulsion: adding the monomer pre-emulsion into the seed emulsion, and adding an initiator; and after the monomer pre-emulsion is added, adding a barrier property accelerant, mixing and filtering to obtain a target product. The invention also provides a polyvinylidene chloride emulsion and an accelerant. A composite hard sheet prepared by coating a PVC hard sheet with the polyvinylidene chloride water-based emulsion has excellent barrier property and can be used in the fields of medicine, food packaging and the like.

The invention relates to the technical field of polyvinyl chloride cable material recycling, and particularly discloses a polyvinyl chloride cable material recycling smashing device which comprises a base and a first-stage smashing box, a fixing frame is installed at the top of the base, the first-stage smashing box is installed at the top of the fixing frame, and a smashing mechanism is arranged in the first-stage smashing box; a rotating frame is arranged at the top of the first-stage crushing box, driving mechanisms are arranged on the outer walls of the two sides of the first-stage crushing box, a filtering mechanism is arranged in the rotating frame and comprises two filtering plates, and gaps are reserved between the two filtering plates and the inner bottom face of the rotating frame. According to the cable material crushing device, before a cable material is crushed, the cable material can be placed at the tops of two filter plates for small-amplitude shaking, so that stone and other impurities in the cable material can be filtered and removed in advance, and the problems that the crushing mechanism is damaged by the impurities, and the service life of the first-stage crushing box is shortened are avoided; and long-time use of the primary crushing box is facilitated.

The invention relates to a copper-based catalyst for catalyzing acetylene hydrochlorination and a preparation method and application thereof, the copper-based catalyst comprises a carrier, a phosphine-containing ligand and a copper-containing stable metal precursor; the molar ratio of the stable-state metal precursor to the phosphine-containing ligand is (2: 1)-(16: 1), and the mass of copper in the copper-containing stable-state metal precursor is 5-10% of the mass of the copper-based catalyst. For a copper-based catalyst containing ligand dimethyl phosphine oxide, when reaction gas contains a certain amount of water vapor, the activity and selectivity of the catalyst are still maintained at a relatively high level; when the reaction gas contains a certain amount of hydrogen, the influence on the activity and selectivity of the catalyst is small, which indicates that the catalyst has excellent hydrophobicity and reduction resistance in the acetylene hydrochlorination reaction, thereby not only enhancing the generation efficiency of the vinyl chloride monomer, but also prolonging the service life of the catalyst and lowering the production cost.

The utility model relates to the technical field of vinyl chloride production equipment, in particular to a vinyl chloride waste incineration flue gas washing tower which comprises a base and a neutralizing tower, the neutralizing tower comprises a gas inlet cylinder and a neutralizing part which are communicated, a gas inlet pipe is arranged in the gas inlet cylinder, and a gas outlet pipe is arranged in the neutralizing part. The neutralization part comprises a first filler part, a first liquid distributor, a bubble cap tray, a partition part, a second filler part, a second liquid distributor, a demister group, a demister cleaning device and an end socket which are sequentially arranged from bottom to top, and an air outlet is formed in the top of the end socket. According to the utility model, the residence time of flue gas in the tower is prolonged by adjusting the size proportion of the height and the pipe diameter of the neutralization tower, so that the neutralization reaction of the flue gas and alkali liquor is more thorough; the nozzle group for uniformly atomizing and spraying the alkali liquor is arranged, so that the contact area of the alkali liquor and the flue gas is increased; by arranging the bubble cap tray, flue gas is dispersed into fine bubbles in alkali liquor, and the contact area of the flue gas and the alkali liquor is increased, so that the neutralization efficiency is improved.

The present invention discloses a preparation method and a use method of a Cu-based catalyst for the preparation of vinyl chloride by acetylene hydrochlorination in a fixed bed. This method adopts an "in-situ loading + pyrolysis activation" strategy. By means of the physical barrier, chemical coordination of the polymer network to the copper salt precursor during the polymerization process of vinyl monomers and the in-situ anchoring effect of the N sites in the subsequent polymer pyrolysis products on Cu atoms, the dispersion of Cu species on the surface of the carrier is significantly improved, and their agglomeration is effectively inhibited. Further modification with sulfur-containing inorganic compounds and quaternary phosphonium salt ionic liquids can further enhance the valence stability of Cu sites and effectively inhibit reaction carbon deposition, improving the long-term reaction stability of the catalyst. The present invention develops a new type of Cu-based catalyst and proposes a preparation technology. Applying this catalyst to the reaction of acetylene hydrochlorination to prepare vinyl chloride in a fixed bed has good catalytic activity and reaction stability.

The invention discloses a graphene electrolytic diaphragm material and a preparation method thereof, and belongs to the technical field of diaphragm materials. The preparation method comprises the following steps: S1, weighing the following components in parts by weight: 10 to 15 parts of a modified vinyl chloride-acrylonitrile copolymer, 60 to 65 parts of dimethylformamide, 15 to 25 parts of dimethyl sulfoxide, 6 to 8 parts of modified graphene, 0.4 to 0.5 part of a carbon nanotube and 1 to 2 parts of polyvinylpyrrolidone; s2, sequentially adding a modified vinyl chloride-acrylonitrile copolymer, dimethylformamide, dimethyl sulfoxide, modified graphene, carbon nanotubes and polyvinylpyrrolidone into a reaction tank, heating to 50-60 DEG C, and stirring and dissolving to prepare a glue solution; s3, immersing base cloth into the glue solution, extruding to form a film, soaking in a cold water pool, soaking in a hot water pool, and drying to obtain the product. The prepared electrolytic diaphragm material has good water absorption and low surface resistance, and the production cost of metal nickel can be reduced.

The invention discloses a polyvinyl chloride coiled material floor waste inspection and preservation device, and relates to the technical field of fixed waste treatment, the polyvinyl chloride coiled material floor waste inspection and preservation device comprises a preservation box and a box cover arranged at an opening of the preservation box, a rotating disc is fixedly installed at the output end of a motor, and a plurality of round holes are formed in the surface of the rotating disc; a plurality of placing cylinders are fixedly mounted at the positions, located at the round holes, of the top of the rotating disc, sealing assemblies used for containing detection samples are placed in the placing cylinders, and jacking mechanisms used for jacking the sealing assemblies are arranged at the bottoms of the placing cylinders. According to the present invention, the mutual influence between the detection samples can be avoided so as to improve the detection accuracy in the later stage, and the first sealing is performed on the detection sample through the sealing assembly, and the second sealing is performed on the detection sample through the storage box so as to further enhance the sealing environment of the detection sample, such that the detection accuracy in the later stage can be further improved.

PROBLEM TO BE SOLVED: To provide a vinyl chloride resin composition that is substantially free of tin-based stabilizers and has transparency and heat resistance. SOLUTION: A vinyl chloride resin composition containing at least 100 mass parts of a vinyl chloride resin, 0.5-2.6 mass parts of an organic acid zinc salt stabilizer, and 2-5 mass parts of a bisphenol A-type epoxy resin (excluding those containing an organotin stabilizer).

The invention discloses an oyster shell reinforced polyvinyl chloride plate and a processing technology thereof, and relates to the technical field of polyvinyl chloride. The preparation method specifically comprises the following steps: S1, preparing polyvinyl chloride, oyster shell powder, a heat stabilizer, a plasticizer, a lubricant and an antioxidant as raw materials for later use; s2, calcining and modifying the oyster shell powder to obtain enhanced oyster shell powder; s3, sequentially putting the enhanced oyster shell powder and other raw materials into a high-speed mixer, uniformly mixing, plasticizing and extruding through a double-screw extruder, pulling into sheets, putting into a mold, calendaring into a plate, and cutting to obtain an oyster shell enhanced polyvinyl chloride plate; the oyster shell reinforced polyvinyl chloride plate prepared by the invention has excellent impact strength and flame retardant property, and has good moisture and heat retention rate, antibacterial property and lower density.

The utility model relates to a cable, and aims to provide a salt-fog-resistant high-water-blocking bending-resistant seamless aluminum extruded tube coaxial cable, which has the characteristics of salt fog resistance, corrosion resistance, good water-blocking property and small bending-resistant radius. According to the technical scheme, the salt-mist-resistant high-water-resistance bending-resistant seamless aluminum extruded tube coaxial cable comprises an inner conductor, and an insulating inner layer, an insulating foaming layer, a shielding layer and a sheath layer which are sequentially coated outside the inner conductor from inside to outside, the cable is characterized in that the inner conductor is made of high-strength copper-clad aluminum, the insulating inner layer is a salt-mist-resistant low-density polyethylene insulating layer, the insulating foaming layer is a physical foaming polyethylene layer, the shielding layer is a seamless aluminum tube, and the sheath layer is a vinyl chloride layer. An insulating outer surface bonding layer is arranged between the insulating foaming layer and the shielding layer, a waterproof layer is arranged between the shielding layer and the sheath layer, and a waterproof layer is arranged between the shielding layer and the sheath layer.

The present invention provides a molded article of a vinyl chloride-based resin composition excellent in mechanical properties such as tensile elongation at break while containing two or more kinds of calcium carbonate materials having different characteristics as a filler. The molded article of a vinyl chloride-based resin composition according to the present invention is obtained by blending a vinyl chloride-based resin and a filler. The filler includes a first calcium carbonate material and a second calcium carbonate material having different aspect ratios. The first calcium carbonate material is preferably a pulverized product of scallop shells.