185results about How to "Improve oxygen barrier performance" 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 a method for preparing antibacterial edible films. The method includes adding polysaccharide materials and epsilon-polylysine into a stirring ball mill and enabling the polysaccharide materials and the epsilon-polylysine to carry out ball-milling reaction at the temperature of 25-50 DEG C for the reaction time of 5-10min to obtain polysaccharide and epsilon-polylysine compounds; adding water into the polysaccharide and epsilon-polylysine compounds, gelatin and glycerin to prepare film forming liquor; coating the film forming liquor to form the antibacterial edible films. A mass ratio of the polysaccharide materials to the epsilon-polylysine is 5:0.8-2.2. The method has the advantages that other solvents can be omitted in reaction procedures, the reaction time is short, the temperature is low, products have light colors, good film forming effects can be realized, the films obtained by the aid of the method have broad-spectrum antibacterial activity, and the toughness and the oxygen barrier capacity of the edible films can be improved.

The invention provides a water-tolerant blocking polyvinyl alcohol coating for coating and a preparation method thereof; the coating is prepared from the following raw materials in percentage by weight: 5-7% of polyving akohol, 0.01-0.05% of nanometer montmorillonite, 0.5-1% amino resin, 0.01-0.3% of catalytic agent, 0.01-0.1% of defoaming agent and 91-94% of deionized water; by adding the nanometer montmorillonite in the polyvinyl alcohol coating, after the modified coating is coated, the nanometer montmorillonite is dispersed in a polyving akohol coating in a layered structure so as to block gases such as oxygen and the like from flowing and diffusing so as to further increase the oxygen blocking performance of a polyving akohol coating membrane; and the coating is stable, has good coating adaptability, is simple in process and is suitable for industrial production.

The invention relates to a high-temperature thermal barrier coating material. The high-temperature thermal barrier coating material is rare earth niobate and a solid solution thereof. The chemical constitution of the rare earth niobate is Ln3NbO7, and Ln comprises the rare earth elements of La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y and Sc. The chemical constitution of the solid solution is Ln3(Nb1-xTax)O7 (x is larger than or equal to 0 and smaller than 1). Ln is a combination of one or more than one of the rare earth elements. The high-temperature thermal barrier coating material is characterized in that the heat conductivity of the material is low, when the temperature is 1000 DEG C, the intrinsic thermal conductivity of a compact block body is 1.1-1.4 W/m.k, compared with a commercial yttria-stabilized zirconia (YSZ) material (the thermal conductivity is about 2.5 W/m.k) with the weight percentage being 7%-8%, the thermal conductivity of the material is reduced by a large margin, and the material keeps phase stability and excellent oxygen-resistance capacity from the indoor temperature to the temperature of 1600 DEG C. The material can be applied to protection of high-temperature metal hot end parts of gas turbines or aero-engines.

The invention relates to a method of producing a laminated packaging material (10) including a core layer (16) of paper or paperboard and a barrier layer (14) applied on one side of the core layer. The invention also relates to a laminated packaging material (10) produced according to the method, as well as a packaging container (50) which is produced from the laminated packaging material (10).

The invention discloses a multilayer co-extrusion high-barrier film, a preparation method of the film and production equipment used by the preparation method. The multilayer co-extrusion high-barrier film has excellent oxygen barrier properties, tensile strength and high strength, the gradation is distinct, solvent residues are avoided, and the requirements on industrial products and food package can be met. According to the preparation method, a co-extrusion form is adopted, different materials are co-extruded in a molten state by virtue of a die head of a film blowing machine, the barrier film with distinct gradation is prepared, a composite processing technology is reduced, the problems such as solvent residues caused by compounding are solved, and the barrier film has the advantages of high efficiency and high yield. Moreover, the production equipment can be matched with the production method so as to perform high-efficiency production process, so that the barrier film has uniform film thickness, and high production efficiency and product quality are guaranteed.

The invention provides technology for producing a degradable and edible film by utilizing corn composite modified starch, belonging to the technical field of food processing. The technology comprises the following main production processes: firstly gelatinizing the corn hydroxypropyl-phosphate monoester composite modified starch; then adding glycerin, sorbitol, sodium alginate, carrageenan and other components which improve the film performance; carrying out tape casting on the film solution on a copper plate after homogenization and degasification; adopting a copper plate film forming conveyer belt to firstly pass through steam drying pipeline equipment and then pass through cooling pipeline equipment with relative humidity being about 50% to form a film; and finally adopting mechanical film rolling equipment to roll the film, thus producing a degradable and edible film with high strength. The film material has good mechanical performance and oil, moisture and oxygen resistance. The film can be applied to packaging of various materials such as food, health products, drugs, feed and the like.

The invention discloses linseed oil microcapsules and a preparation method thereof. The preparation method comprises the following steps of (1) performing hydrolyzing and extracting by an enzyme method to obtain linseed oil; (2) preparing an aqueous phase; (3) preparing an oil phase; (4) performing high-speed cutting emulsifying on a mixture of the aqueous phase and the oil phase by a cutter; (5)performing homogenizing on obtained emulsion by a high pressure homogenizer; and (6) performing spray drying on the obtained emulsion to obtain linseed oil microcapsule granules. The linseed oil microcapsules are high in solubility, good in emulsibility, high in stability, good in film-forming properties and high in packing rate. The linseed oil microcapsules have good mouth feel and flavor, and are safe and reliable in quality; and besides, the preparation technology is simple, mass production is convenient, and the loading quantity of the obtained linseed oil microcapsule granule linseed oilcan achieve 42%, and the microcapsule entrapping rate is 90% or above.

The invention discloses a non-thermal processing method for soft fruit and vegetable cans, and belongs to the technical field of can processing. The method comprises the following steps of sorting, classification, washing, removal of peels, kernels and seeds, slicing, crisp keeping, blanching, cooling, canning, blending, vacuum seal, high hydrostatical sterilization and the like, wherein the pressure of the high hydrostatical sterilization is 400 to 600 MPa, and the pressure maintaining time is 3 to 30 min. In the method, the blanching is combined with the high hydrostatical sterilization, so that compared with the conventional processing technology for the fruit and vegetable cans, the method has the advantages of killing microorganisms, passivating endogenous enzymes, maintaining organoleptic quality such as color, smell, taste and the like and the nutrient components of the product, ensuring food safety, prolonging storage period under the condition of not adding preservatives, and eliminating the cooking smell of the conventional fruit and vegetable cans; and metal cans and glass bottles are replaced by EVOH/PVPP bottles or bags with high oxygen barrier property, so that the soft fruit and vegetable cans are light and portable, attractive, convenient to open and easy to transport.

The invention discloses water supply pipes and a preparation method thereof. The water supply pipes are formed by combining at least one polyethylene layer and one polyethylene derivative layer closely, wherein the polyethylene derivative layer is the inner layer of the pipes. The preparation method of the water supply pipes comprises the following steps of: extruding the polyethylene layer and the polyethylene derivative layer by using an extruder respectively, heating, extruding by using a die head of a die head area of the same extruder, sizing the combined composite pipes, and cooling twice to form the water supply pipes. The water supply pipes have no toxic or side effect, aging resistance, acid-base resistance, high oxygen resistance, high cost performance, safety and reliability, high strength and toughness, strong impact resistance, low comprehensive cost and strong market competitive power, is easy to machine, convenient to use, difficult to age, crack and permeate, and is the innovation of the pipes. The water supply pipes can solve the problems that anti-aging degree, the using temperature and the oxygen resistance are low, and bacteria are easy to breed and the like inpolyethylene (PE) pipes effectively.

A display and a manufacturing method thereof are provided. The display includes a frame, an organic light-emitting diode (OLED) panel, a transparent element and a glue. The OLED panel is disposed in the frame. The transparent element is disposed on the OLED panel. The glue is filled between the OLED panel and the transparent element and between the OLED panel and the frame.

The invention provides technology for producing a vegetable protein and konjac glucomannan composite degradable and edible film, belonging to the technical field of food processing. The technology comprises the following main production processes: mixing and stirring soy protein, glycerin, konjac glucomannan and sodium carboxymethylcellulose; heating the materials to react; then carrying out tape casting on the film solution on a copper plate through homogenization and degasification; adopting a copper plate film forming conveyer belt to firstly pass through steam drying pipeline equipment and then pass through cooling pipeline equipment with relative humidity being about 50% to form a film; and finally adopting mechanical film rolling equipment to roll the film, thus producing a degradable and edible film with high strength. The film material has good mechanical performance and oil, moisture and oxygen resistance. The film can be applied to packaging of various materials such as food, health products, drugs, feed and the like.

The invention relates to a high-oxygen-barrier polyvinylidene chloride coating emulsion. The emulsion is prepared from the raw materials by weight percent: 65-83% of PVDC (Polyvinyl Dichloride) copolymerization emulsion, 1-6% of adhesion promoter, 2.8-7.5% of nano montmorillonite, 0.2-0.5% of dispersing agent, 2-4% of slip agent, 3-4% of anti-sticking agent and 21-36.5% of deionized water, wherein the PVDC copolymerization emulsion is prepared from the raw materials by weight percent: 43-52% of polyvinyl dichloride, 2-4% of acrylic acid, 3-5% of butyl acrylate, 0.5-3.5% of ethyl methacrylate, 0.4-2.5% of acrylonitrile, 0.2-0.4% of chain initiator, 0.3-0.8% of emulsifying agent, 37-45% of deionized water and 0.1-0.5% of defoaming agent. The emulsion is used for the coating technology, is free from precoating primer, and has higher oxygen barrier performance.

The invention concerns a method of producing an MFC film comprising reinforcement fibers, which film show excellent oxygen barrier properties and is easy to handle. The method of manufacturing the film comprises the steps of: —providing a suspension comprising a first microfibrillated cellulose (MFC) in an amount of at least 50 weight %, reinforcement fibers in an amount of at least 5 weight %, all percentages calculated on the total solid content of said suspension, and a formation aid, —mixing said suspension to form a mixture, —forming a fibrous web from the mixture, and —dewatering and/or drying said fibrous web to form a film having a basis weight of less than 40 g/m², a specific formation number of below 0.45 g^0.5/m², and an Oxygen Transmission Rate (OTR) value of below 100 ml/m²/per 24 hours, preferably of below 50 ml/m² per 24 hours at 50% relative humidity. The invention further discloses a film and use of the film in food or liquid packaging applications.

The invention relates to the technical field of functionalization and high performance of plastic pipes, in particular to a graphene modified oxygen-resistant polyethylene master batch and a preparation method and application thereof. The modified plastic master batch is composed of the following components: a polyethylene matrix, graphene, a second oxygen inhibitor, a coating agent, a surface treating agent, a dispersing agent and an antioxidant. According to the three-step production process, the mixing, dispersing and stripping effects of graphene in a polyethylene matrix are improved, thefilling proportion of graphene in the composite material is increased through organic combination of a new material, a new technology and a new method, and formation of a perfect network structure inthe composite material matrix is promoted. The oxygen barrier property of the composite material can be remarkably improved through good construction of a network, so that the application potential ofgraphene in the oxygen barrier pipe is brought into full play, and the pipe filled with the high-barrier graphene nanosheet layer structure is obtained.

The invention relates to a calcium sulfate whisker modified polyvinylalcohol composite material and a preparation process thereof. The composite material is prepared by the following materials according to part by weight: 70 to 90 portions of polyvinyl alcohol, 10 to 20 portions of calcium sulfate whisker with the diameter of 10 to 20 Mum, 1 to 3 portions of surface modifier, 1 to 5 portions of plasticizer, and 0.5 to 1.5 portions of lubricant. The preparation method comprises the following steps: adding the calcium sulfate whisker and the surface modifier to a high-speed mixer to mix for 5 to 15 minutes; then adding the polyvinyl alcohol, the plasticizer and the lubricant to the high-speed mixer to mix for 3 to 7 minutes; extruding the mixture from an equidirectional parallel double-screw extruder for granulation; and then conducting injection molding to the particles in an equidirectional parallel double-screw injection machine. The calcium sulfate whisker modified polyvinylalcohol composite material has high strength, low notch sensitivity, good thermal resistance and oxygen resistance, simple preparation process, and low cost, and is especially suitable for making products such as films and the like.

The invention belongs to the field of fresh keeping of foods, and particularly relates to a freezing method of Luchuan pork. The freezing method comprises the following steps of (1) preparing a film coating agent; (2) performing micro-freezing treatment on pork; (3) performing film coating packaging treatment on the micro-frozen pork; and (4) performing ultrasonic assisted freezing preservation on the packaged pork: conveying the packaged pork into a freezing room, performing freezing until the temperature of the central layer of the pork is reduced to 2-4 DEG C, performing ultrasonic-assisted freezing for 3-6h, when the temperature of the central layer of the pork is reduced to minus 6 to minus 8 DEG C, stopping performing ultrasonic-assisted freezing, and continuing freezing the pork to minus 18 to minus 23 DEG C so as to obtain the frozen pork. The freezing method disclosed by the invention is simple to operate and stable in technology conditions, ice crystals generated during freezing of the pork can be reduced, the pork freezing speed can also be increased, the preservative effect is achieved, bacteria are restrained, the freezing storage time of the pork can be prolonged, the cell activity of frozen fresh meat can be guaranteed, and the phenomenon that juice flows outwards after the frozen pork is unfrozen is reduced.