46results about How to "Excellent oxygen barrier" patented technology

The invention provides a high-oxygen barrier property high-strength polyolefin heat conduction pipe and a preparation method thereof. The high-oxygen resistance high-strength polyolefin heat conduction pipe comprises, by weight, 100 parts of polyolefin resin, 0.1-5 parts of graphene slice layers, 0.1-15 parts of a compatilizer and 0.01-0.2 parts of an anti-oxidant. The graphene slice layers are uniformly distributed in the polyolefin resin in a ring way around a pipe central axis as a center. Through use of the graphene slice layers and a rotary core rod mouth mold, a polyolefin crystallization degree is high, a lot of oriented crystals are formed and pipe mechanical properties, heat conduction and heatproof performances are obviously improved. The graphene slice layers are uniformly distributed in the pipe in a ring way so that graphene slice layer obstruction performances are greatly improved and thus the good oxygen barrier property is kept under the condition of a very small amount of an anti-oxidant.

The invention discloses an environmental-protection oxygen barrier antibacterial polypropylene-random (PP-R) pipe. The environmental-protection oxygen barrier antibacterial PP-R pipe comprises a PP-R outer layer, a PP-R oxygen barrier intermediate layer and a PP-R antibacterial inner layer, wherein a high-performance oxygen barrier agent selected in the PP-R oxygen barrier intermediate layer is polyamide and copolymers thereof or polyving akohol and copolymers thereof. The environmental-protection oxygen barrier antibacterial PP-R pipe has a reasonable production formula and low production cost, keeps inherent physical and mechanical properties by adding the oxygen barrier intermediate layer and performing one-time extrusion molding, has high oxygen barrier performance and can prolong the service life of system equipment. The environmental-protection oxygen barrier antibacterial PP-R pipe has an antibacterial rate up to 90 percent on escherichia coli and staphylococcus aureus and has high physical and mechanical properties.

The invention discloses a polymer alloy oxygen blocking material, which is PO-LCP (Polyolefin-Liquid Crystal Polymer) alloy, wherein the alloy is prepared by melting and mixing the following components in percentage by weight: 95-15 percent of polyolefin resin, 4.9-84.3 percent of liquid crystal resin and 1-0.7 percent of compatibilizer. A preparation method comprises the following steps of: melting and plasticizing the LCP resin by an extruder by using a lateral feed two-section extrusion granulator; extruding melt of the resin into another extruder with a second feed port in the waist part in a duck-stuffing manner; converging the PO resin which is being melted, plasticized and extruded in the extruder with the compatibilizer melt; melting and mixing the three components; performing extrusion molding to form strips; and drawing, orientating, cooling and granulating to prepare PO-LCP alloy oxygen blocking material particles. The polymer alloy oxygen blocking material has wide application.

The invention discloses a polyvinyl dichloride (PVDC) emulsion for cellophane coating and a preparation method and application of the PVDC emulsion for the cellophane coating. The PVDC emulsion for the cellophane coating aims at solving the problems that existing cellophane is poor in barrier property, incapable of being used for food packaging and the like. The PVDC emulsion for the cellophane coating is obtained by serving a certain amount of vinylidene chloride, acrylonitrile, methacrylate and itaconic acid as a mixed mononer, selecting specific seeded emulsifier and mixed emulsifier, and adopting seeded emulsion polymerization. The PVDC emulsion for the cellophane coating is low in cost and good in barrier property. The coated cellophane is good in oxygen-resisting and waterproof effects and capable of being used for the food packaging.

The invention discloses a high elastic antirust paint, which is prepared by stirring the following raw materials according to weight proportion: 36 parts of epoxy phenolic resin, 16 parts of ethylene diamine, 27 parts of silicone-acrylic resin, 30 parts of propylene glycol, 10 parts of sodium carboxymethyl cellulose, 5 parts of heavy calcium powder, 6 parts of binder, 15 parts of water dispersion resistance agent, 20 parts of zinc oxide, 10 parts of cellulose acetate, 2 parts of antiseptic, 1 part of mildew inhibitor and 2.5 parts of thickening agent. The high elastic antirust paint has the excellent performances of superior elongation percentage, oxygen inhibition, anticorrosion and the like.

The invention discloses a method for producing a high temperature-resistance high-barrier polypropylene film. According to the method, an isotactic polypropylene-b-polyethylene glycol diblock substance is adopted as a compatibilizer for isotactic polypropylene and polyvinyl alcohol which has excellent oxygen barrier performance, and after the isotactic polypropylene-b-polyethylene glycol diblock substance is adopted as the compatibilizer, good compatibility between the isotactic polypropylene and polyvinyl alcohol is achieved, so that the polyvinyl alcohol phase is dispersed uniformly in the polypropylene resin; therefore, a demi-continuity phase or a lamellar structure is formed, and the barrier performance of the blended film can be improved significantly; the hardness of the thin film is improved through addition of nano-silica so that the energy of heat-resistance deformation is improved, and moreover the tearing effect is improved effectively through addition of palm wax.

The invention relates to an environment-protection weather-proof self-temperature-sensitive fireproof cable, and overcomes disadvantages in the prior art. The cable comprises a cable core, an inner halogen free taping, an aluminum sheath, a fireproof mud isolation layer, an intermediate halogen free taping, a steel band linked armor layer, an outer halogen free taping and an oversheath; the innerhalogen free taping wraps the cable core, the aluminum sheath wraps the inner halogen free taping, the fireproof mud isolation layer wraps the aluminum sheath, the intermediate halogen free taping wraps the fireproof mud isolation layer, the steel band linked armor layer wraps the intermediate halogen free taping, the outer halogen free taping wraps the steel band linked armor layer, and the oversheath wraps the outer halogen free taping; and the oversheath is a self-temperature-sensitive color-change oversheath.

The invention discloses a composite antimony trioxide flame retardant, belonging to the technical field of flame retardants. The omposite antimony trioxide flame retardant disclosed by the invention is prepared from the following raw materials in parts by weight: 40-60 parts of surface-modified antimony trioxide, 10-30 parts of silane modified halloysite nanotubes, 20-30 parts of phosphate amine salt, 2-3 parts of a coupling agent and 3-5 parts of an organic copper salt heat stabilizer, wherein the phosphate amine salt is formed by polymerizing pentaerythritol, phosphorus pentoxide and isobutyramide, and a mass ratio of the pentaerythritol to the phosphorus pentoxide to the isobutyramide is (1.5-2.5): 1: (1.8-3.6). The components of the composite antimony trioxide flame retardant provided by the invention have very good compatibility; and the composite antimony trioxide flame retardant has excellent interface bonding force with a plastic material, is uniformly dispersed, allows a plastic product using the composite antimony trioxide flame retardant to have excellent flame retardance and smoke suppression performance, and improves the mechanical properties of the plastic product.

The invention relates to the technical field of polymer materials, and in particular relates to a food packaging film with an antimicrobial function and a preparation method thereof; the food packaging film comprises the following raw materials in parts by weight from the inside to the outside: an antibacterial layer comprising 40-50 parts of polyvinylidene chloride, 15-30 parts of metallocene polyethylene, 0.1-1 parts of an anti fog agent, 1-10 parts of a composite antibacterial agent and 0.1-3 parts of ethylene bis-stearamide; a preservation layer 20-40 parts of low density polyethylene layer, 20-40 parts of a vinylidene chloride-vinyl chloride copolymer, 5-15 parts of shell powder and 0.5-2 parts of stearic acid and a barrier layer comprising 40-50 parts of an ethylene / vinyl alcohol copolymer, 20-30 parts of high density polyethylene, 0.1-0.5 part of an initiator, 0.1-2 parts of an anti fog agent and 0.1-3 parts of an antioxidant. The food packaging film has good antibacterial property.

The invention discloses a preparation method of a polypropylene film layer capable of improving barrier property, which specifically comprises the following steps: (1) in the presence of hydrogen, catalyzing propylene polymerization by using a catalytic system consisting of a metallocene catalyst and an alkylaluminoxane cocatalyst by using a styrene derivative as a chain transfer agent to obtain isotactic polypropylene; (2) blending the isotactic polypropylene with polypropylene random copolymer, an isotactic polypropylene bpolyethylene glycol diblock copolymer, polyvinyl alcohol, a silicon dioxide modifier, a nucleating agent and a compatilizer, performing sufficient melt blending in a screw extruder after blending, and performing extrusion and bidirectional stretching to obtain a polypropylene film layer, wherein the nucleating agent is a beta crystal form nucleating agent. The aluminum-plastic film prepared from the polypropylene film layer provided by the invention is better in gas-liquid barrier property, higher in safety and longer in service life, and has a good application prospect.

The invention discloses a nano-composite film bag capable of realizing one-way venting and high obstruction, belongs to soft packing bags for food and medicines, and aims to provide a soft packing bag which is applied to the food and medicines, can vent gas inside the bag as well as prevent external gases such as oxygen, nitrogen, hydrogen, dioxides, water vapor and the like from entering the bag and is simple in production technology and low in cost. The nano-composite film bag comprises a bag body made of a heat-seal base material film and nonwoven fabric overlapped at a joint of the bag body, wherein the outer surface of the heat-seal base material film (4) is coated with a PVA film layer (3). The composite film bag is non-toxic and good in obstruction property, is an ideal environment-friendly packing material, and can replace existing high-obstruction packing materials for the food and medicines.

The present invention discloses a nano-antirust coating. The nano-antirust coating is mainly prepared by stirring the following raw materials, wherein the raw materials comprise, by weight, 46 parts of nano-polyacrylate emulsion, 30 parts of nano-scale titanium dioxide, 20 parts of ethylene glycol, 10 parts of sodium carboxymethyl cellulose, 5 parts of heavy calcium powder, 6 parts of a binder, 10 parts of cellulose acetate, 35 parts of deionized water, 5 parts of tannic acid, 1 part of a pH value adjusting agent and 2.5 parts of a thickening agent. The product of the present invention has excellent performances of excellent extensibility, good elasticity, high tensile strength, water preventing, oxygen preventing, corrosion protection, and the like.