94results about How to "Oxygen barrier" patented technology

The invention discloses a covering film for medicinal PTP (press through packaging). The covering film is prepared from paper, a polyester film layer and an aluminum foil through composition, wherein an ink layer and a gloss oil layer are arranged on the outer surface of the paper; a first binder layer is arranged between the paper and the polyester film layer; a second binder layer is arranged between the polyester film layer and the aluminum foil; a hot-sealing layer is arranged on the other surface of the aluminum foil. A preparation method of the covering film comprises steps as follows: (1), printing; (2), the first time of composition; (3), the first time of curing; (4), glue applying; (5), the second time of composition; (6) the second time of curing; (7), slitting; (8), packaging. The paper, the polyester film and the aluminum foil are composited, accordingly, the strength of the covering film is improved, the covering film can be prevented from being broken by children, and the safety is improved; with the adoption of the aluminum foil, vapor and oxygen can be further blocked; the preparation method is simple and easy to implement; the pulling strength index of the covering film prepared with the method reaches 55.3-106.9 N/15 mm, and the hot-sealing strength of the binder layers reaches 13.5-16.2 N/15 mm.

The invention provides a nano-palygorskite reinforced flame retarding epoxy resin composite material which disperses the nano-palygorskite into epoxy resin matrix by means of ultrasonic dispersion by mass ratio between 1:100 and 8:100 after surface treatment is carried out to the nano-palygorskite, then mix the obtained palygorskite epoxy resin mixture with a reactive-type flame retardant by the mass ratio between 100:5 and 100:30, and casting and curing are carried out. A plurality of P-N bond intermediates formed in the reactive-type flame retardant of the invention are phosphorylating agents better than routine phosphorus compounds, and water vapor generated from nano-palygorskite acting as a synergistic flame retardant during burning is in great favor for a phosphorous flame retardant, and the reinforcement of appropriate amount of nano-palygorskite compensates for the reduction of the mechanical property of the epoxy resin caused by adding the flame retardant to some extent, serving double effect of flame retardation and reinforcement, thus, the flame retarding epoxy resin composite material of the invention has the advantages of high oxygen index, good smoke suppression effect and excellent physical and mechanical properties.

The invention relates to an expansive char-forming flame-retardant polypropylene composition and a production method thereof. The composition comprises the following components: 100 weight parts of polypropylene, 10-30 weight parts of ammonium polyphosphate, 2.8-8.3 weight parts of pentaerythritol, 2.8-8.3 weight parts of melamine cyanurate and 0.5-5 weight parts of montmorillonite. The total additional amount of ammonium polyphosphate, pentaerythritol and melamine cyanurate is at least 31 weight parts. The production method comprises the following steps: proportioning all components (including polypropylene, ammonium polyphosphate, pentaerythritol, melamine cyanurate and montmorillonite) at the given ratios, melting, mixing, extruding and granulating. The composition has better flame retardation, good processability and mechanical property. The production method is simple and reliable.

The invention relates to a traditional poultry egg product composite nano-material coating preservation method, belonging to the poultry egg fresh-keep packaging technical field. The method comprises the following steps: 5%-10% polyvinyl alcohol and 0.1%-0.5% nano-SiO2 are dissolved in water and heated; 1% -5% stearic acid is dissolved in (w/v is equal to 1:15-20) ethanol and heated; when the temperature of the polyvinyl alcohol solution and that of the stearic acid solution reach 80-85 DEG C at the same time, the two solutions are mixed, heated and stirred evenly to prepare the composite film coating agent; and the composite coating agent is hot-coated on the surface of the poultry egg and then dried with hot air and filmed. Compared with the cooked egg vacuum-packaging, the poultry egg coating preservation method can significantly reduce the using amount of packaging materials and simplify the packaging sterilization technique of the cooked eggs; besides, the poultry egg coating preservation method can achieve mechanized operation, effectively reduce the damage rate of eggs and significantly improve the economic benefits; moreover, the composite coating material is safe and degradable, which improves the marketability of products after being filmed on the egg surface and can also extend the shelf-life of the cooked egg products.

The invention relates to a method for preparing an edible composite protein film. The method adopts wheat gluten and zein as base materials, and adds a plasticizing agent and a reinforcing agent. The method overcomes the defect that the wheat gluten monomer is difficult to be applied in the actual production due to poor film-forming water resistance and mechanical strength. The method has the advantages of wide raw material sources and simple production process, has no environmental pollution, remarkably improves the mechanical strength and the water resistance of the modified wheat gluten-zein composite film, and has wide development prospect in the field of food packaging.

The invention provides a halogen-free flame-retardant high impact polystyrene composite material prepared by taking vermiculite as a flame-retardant additive. The composite material is prepared by the following steps: mixing vermiculite powder crushed to 100 to 500 meshes and a halogen-free flame retardant according to the mass ratio of 1:1-1:10 to form a vermiculite composite flame retardant; and then banburying and injecting the vermiculite composite flame retardant and high impact polystyrene according to the mass ratio of 1:1-1:5. The halogen-free flame retardant is a compound of red phosphorus, expanded graphite and melamine. The flame-retardant composite material has low price, simple preparation process, better flame-retardant performance, and oxygen index of more than 27, and meets the requirements of a nonflammable material.

The invention relates to a paper-base packing material, in particular to flexible packing material which is used for the long-acting sterility and fresh keeping of drinking food. The paper-base plastic-aluminum composite packing material of the invention comprises a polyethylene outer layer, a base paper layer disposed behind the outer layer, a polyethylene binding layer arranged behind the base paper layer, an aluminum leaf mounted behind the binding layer, and an adhesive polyethylene layer and a polyethylene inner layer positioned behind the aluminum leaf, wherein the base paper layer is coated with base paper modified layer, and the weight per unit area of each layer includes the polyethylene outer layer 19-20 g/m2, the base paper layer 20-40 g/m2, the polyethylene binding layer 18-20 g/m2, the base paper modified layer 1-8 g/m2, the aluminum leaf 20-22 g/m2, the adhesive polyethylene layer 15-17 g/m2, and the polyethylene inner layer 17-18 g/m2. Both the utilization per unit area of the base paper of the invention and the total weight per unit area of the products are greatly reduced, thereby reducing the cost of products under the pre-condition of guaranteeing each property of the products.

The invention relates to a polystyrene coating comprising the following components in parts by weight: 100-120 parts of polystyrene-acrylate copolymer, 70-85 parts of polyvinyl alcohol, 6-9 parts of potassium silicate, 2-6 parts of acetone, 4-8 parts of cellulose acelate, 2-3 parts of corrosion remover, 3-8 parts of ethylene glycol and 2-7 parts of teflon. The polystyrene coating contains six parts of cellulose acelate. The polystyrene coating provided by the invention is improved on the basis of modified alkyd resin and an organic silicon copolymer so that the polystyrene coating has favorable flexibility and adhesive force, high temperature resistance and originalcorrosion preventing property and is widely applied to corrosion prevention of metal structures such as power plants, various chemical equipment and pipelines. The coating provided by the invention has excellent performances such as safety, no toxicity, water and oxygen blockage, good rust prevention effect and short drying time.

The invention belongs to the technical field of health care drinks and in particular relates to a production method of a dealcoholic drink containing aquilaria sinensis tea fungus gel. The production method provided by the invention comprises the following steps of: adding black tea fungus into an extracting solution of fresh aquilaria sinensis leaves and hovenia dulcis thub and fermenting to obtain a tea fungus solution, then adding gellan gum to prepare gel granules containing the tea fungus solution, bottling, then adding fruit and vegetable honey juice prepared by tomatoes, sea-buckthorn juice and honey, and sealing, wherein a sterile clean operation is adopted in the production process, and the dealcoholic drink containing aquilaria sinensis tea fungus gel is prepared. The dealcoholic drink containing aquilaria sinensis tea fungus gel has the effects of preventing alcoholism, quenching thirst, preventing or arresting vomiting, protecting gastric mucosa and protecting liver.

The invention discloses a processing method for maintaining the elasticity and the flavor of clam meat, which comprises the steps of: selecting claw materials, temporarily breeding the clam to disgorge sands, sterilizing the clam by ozone after the clam is cleaned, then vacuum-packaging the clam by using high-barrier gas composites, then atmospherically cooking the packed clam, and finally cooling and freezing the clam for storing. The method can effectively maintain the elasticity and the sauce flavor of the clam and also can effectively prevent air in or outside a packaging bag from mutually penetrating during the refrigeration and the shelf life of the clam because the clam is vacuum-packaged by using the high-barrier gas composites, ensures the quality of the clam and prolongs the shelf life of the product.

The invention discloses a flame-retardant ceramic slurry for a lithium battery coating diaphragm and a preparation method of the flame-retardant ceramic slurry, wherein the slurry comprises inorganicparticles, an intumescent flame retardant, a dispersing agent, a binding agent, a thickening agent and a solvent; the preparation method comprises the following steps of adding the inorganic particles, the dispersing agent, the thickening agent and the solvent into a ball mill according to the proportion to be dispersed, so as to obtain a dispersion liquid; and then adding the binding agent and the intumescent flame retardant into the dispersion liquid, and carrying out dispersing by using a dispersing machine to prepare the flame-retardant ceramic slurry. The ceramic slurry disclosed by the invention can improve the heat resistance of the diaphragm, the lithium battery can be prevented from burning and exploding in a large range, and the safety performance of the lithium battery is improved.

The invention discloses a water-based fluorine-containing acrylate copolymer emulsion and a preparation method thereof. According to the scheme, methyl methacrylate, butyl methacrylate, methacrylic acid and other monomers are copolymerized to prepare a fluorocarbon resin emulsion; fluorine-containing acrylate monomers such as trifluoroethyl acrylate, octafluoropentyl methacrylate and hexafluorobutyl methacrylate are introduced in a preparation scheme, fluorine-containing groups are easy to migrate to the surface and are enriched on the surface, so that a coating film is endowed with excellent hydrophobic performance, and due to the advantages of excellent weather resistance, chemical resistance stability and the like of a fluorine-containing polymer, the hydrophobic property of the coating film is greatly improved. It can be guaranteed that a coating film has the properties of low surface energy, low friction, stain resistance, good water and oil resistance, self-cleaning performance and the like, and the comprehensive practicability is high. And meanwhile, pretreatment and parameter limitation are carried out on the PET film in cooperation with the scheme, so that the adhesive force between the coating film and the PET film is further improved.

The invention relates to a flame-retardant agent containing a spirane structure and having an antioxidant function and a preparation method, and belongs to the technical field of flame-retardant agents. High-activity phosphoryl chloride on phosphorus oxychloride and hydroxyl groups on pentaerythritol have nucleophilic substitution reaction to prepare a spirocyclic phosphate intermediate SPDPC, then active chlorine on SPDPC and alcoholic hydroxyl groups on hindered amine are used for nucleophilic substitution reaction, and the flame-retardant agent containing the spirane structure and having the antioxidant function is formed. The spirocyclic phosphate structure contains pentaerythritol units and can provide sufficient carbon sources for an expansion flame-retardant system. Besides, the hindered amine can effectively capture active radials generated during decomposition of polymer, and chain reaction is delayed.

The invention discloses a food fresh-keeping packaging bag. The food preservation packaging bag includes a polyethylene film layer, a printing layer and a nylon film layer from the inside to the outside, a high barrier layer is arranged between the polyethylene film layer and the nylon film layer, and a high barrier layer is arranged between the high barrier layer A printing layer is provided. The food fresh-keeping packaging bag adopting this technical scheme, the high barrier layer can effectively keep the fresh molecules of pickled vegetables from leaking out, so that the freshness of pickled vegetables can be preserved for 3 to 6 months, and the crispness can be kept for 3 months. extended to 12 months. The invention also discloses a method for manufacturing the food fresh-keeping packaging bag. The method comprises the steps of compounding a high barrier layer, printing patterns, compounding a polyethylene film layer, and making a machine bag. The method is scientific and reasonable, and is suitable for large-scale industrial production.

The invention provides a sargassum polysaccharide food packaging film and a preparation method thereof, and belongs to the technical field of food packaging films. According to the food packaging filmprovided by the invention, sargassum is taken as a raw material, and sargassum polysaccharide is extracted in a combination mode of ultrasonic and enzymolysis, so that the extraction rate of polysaccharide is increased, and extraction efficiency is improved. The sargassum polysaccharide has good water solubility, has high viscosity and solidification capability and is good in film-forming property. Hydrophobic agent glycerol and plasticizer gelatin are added into the formula, so that hydrophilicity of the polysaccharide is reduced, and mechanical properties of the film are improved. The obtained food packaging film has various effects of resisting oxidation, reducing blood fat, resisting radiation, being safe and harmless, being degradable and the like.

The invention belongs to the field of functional films, and relates to an intelligent moisture control film, and a preparation method and application thereof. The intelligent moisture control film comprises a base layer, and an additional layer or additional layers located on one side or both sides of the base layer. The base layer is a porous film with the pore diameter of 0.005-250 micrometers and the porosity of 30-80%, and pores with the pore diameter being one order of magnitude higher or lower than the average pore diameter account for more than 50%. The additional layer/layers is/are adense film or dense films comprising polyvinyl alcohol, a metal salt, and an optional crosslinking agent and/or an optional antibacterial agent. The intelligent moisture control film has an intelligent moisture control function, maintains the humidity of fruits and vegetables when the relative humidity is low, improves the moisture permeability when the relative humidity is high to prevent dewingand rotting of the fruits and vegetables, has oxygen barrier properties, and can be applied to fresh-keeping fruit and vegetable boxes and refrigerators with the fresh-keeping fruit and vegetable boxes.