169results about How to "High gas barrier" patented technology

A gas-barrier heat-seal composite film is provided. The gas-barrier heat-seal composite film includes a heat-seal layer including very low density polyethylene (VLDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), high density polyethylene (HDPE), metallocene polyethylene (mPE), metallocene linear low density polyethylene (mLLDPE), ethylene vinyl acetate (EVA) copolymer, ethylene-propylene (EP) copolymer or ethylene-propylene-butene (EPB) terpolymer, and a gas-barrier layer formed on the heat-seal layer, wherein the gas-barrier layer includes a plurality of composite layers, each including a polymer substrate and a single layer or multiple layers of metal or oxide thereof which is formed on one side or both sides of the polymer substrate, and the polymer substrate includes uniaxial-stretched or biaxial-stretched polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyimide (PI), ethylene / vinyl alcohol (EVOH) copolymer or a combination thereof. The invention also provides a vacuum insulation panel including the composite film.

Provide is a method of preparing a highly-functional film capable of reducing surface failure and of improving the yield, and a manufacturing apparatus thereof. This is a plasma discharge treatment apparatus to plasma-discharge-treat for the surface of a substrate conveyed between a winder and an unwinder at atmospheric pressure or approximately atmospheric pressure, and is a plasma discharge treatment apparatus by which the substrate is conveyed with no contact by only nip roller separating the discharge section from outside. Provided is a method of preparing a gas barrier film exhibiting high gas barrier, together with reduction of surface failure (crack failure) during gas barrier thin layer formation. The surface on the gas barrier thin layer side of the gas barrier film has a curvature radius of at least 75 mm during conveyance, and the surface on the opposite side has a curvature radius of at least 37.5 mm.

The invention relates to a high insulated aluminum composite film used to pack liquid milk, wherein it has multilayer structure, from outer to inner, as printing layer, adhesive layer, aluminum layer, adhesive layer, baffle layer, adhesive layer and thermal sealing layer; the baffle layer is made from polyvinylidene chloride polymer or ethane-ethenol polymer. Compared with traditional plastic soft film, the invention avoids the carbon black layer and increases the aluminum layer and oxygen baffle layer, to obtain high waterproof ability and high insulated property, etc.

An aqueous ethylene / vinyl alcohol copolymer dispersion which has excellent long-term storage stability, has excellent film-forming properties even when dried at a low temperature or in a short time or applied thick, and gives a film having high gas barrier performance. The aqueous ethylene / vinyl alcohol copolymer dispersion comprises (A) an ethylene / vinyl alcohol copolymer having an ethylene content of 15-65 mol% and a degree of saponification of 80 mol% or higher, (B) an ethylene / a,ss-unsaturated carboxylic acid copolymer neutralized with a base, and (C) polyvinyl alcohol having a degree of saponification of 75-100 mol% and a degree of polymerization of 100-3,500, the amount of the polyvinyl alcohol (C) being 0.5-100 parts by weight per 100 parts by weight of the ethylene / vinyl alcohol copolymer (A).

The present invention relates to high-strength and high-toughness polylactic acid composite film with antimicrobial and barrier properties. Raw materials of the high-toughness polylactic acid composite film comprises polylactic acid, EVOH, polylactic acid grafted glycidyl methacrylate, ethylene-octene copolymer grafted glycidyl methacrylate, eight-arm maleic anhydride POSS, nano TiO2, an antioxidant, and an anti-UV agent. The composite film is formed through multilayer coextrusion. The composite film has excellent strength and toughness, a good oxygen barrier property to gas, and a good antimicrobial effect, and can be used in the field of the environmentally friendly packaging film.

The invention discloses a high-oxygen-resistance nano-composite membrane and a preparation method thereof. The preparation method comprises the following steps: adding a filler dispersion liquid intoa first solution, conducting uniform stirring, dropwise adding a second solution, conducting uniform mixing under stirring, carrying out ultrasonic degassing treatment and standing, conducting tape-casting on the mixed liquid to enable the mixed liquid to enter a mold, and conducting drying and curing to obtain the high-oxygen-resistance nano-composite film. The lamellar nano-filler is controlledto account for 0.2-2 wt% of the total mass of the raw materials. The first solution is obtained by adding a hydrophilic polymer into deionized water and conducting heating and stirring to completely dissolve the hydrophilic polymer; the second solution is obtained by dissolving a metal chloride in deionized water to prepare a metal ion solution; and the uniform filler dispersion liquid is obtainedby adding a lamellar nano-filler into deionized water and conducting uniform stirring and mixing and ultrasonic treatment. The high-oxygen-resistance nano-composite membrane has the advantages of being excellent in oxygen barrier property, small in filler consumption, simple and convenient to operate, easy to process, biodegradable and excellent in comprehensive mechanical property.

The invention discloses a bentonite / starch composite degrading material produced by melt intercalation and a preparation method. The bentonite / starch composite degrading material is prepared from the following raw materials in parts by weight: 10 to 90 parts of biodegradable polymer material, 10 to 90 parts of starch, 5 to 30 parts of plasticizer, 1 to 5 parts of internal / external lubricant, 1 to 5 parts of heat stabilizer, 0.5 to 2.5 parts of antioxidant, and 1 to 30 parts of bentonite. The preparation method comprises the steps of blending the compound materials; plasticizing; extruding; granulating to obtain the final product. The bentonite / starch composite degrading material produced by melt intercalation and the preparation method has the beneficial effects that (1) the bentonite added can improve the heat resistance and processing fluidity of starch and can be greatly intercalated or filled, so that the production cost is decreased; (2) the starch is easily plasticized through the plasticizer; (3) the starch strength is greatly improved after the plasticizing; (4) the biodegradation is completely done; the characteristics of being small in investment, fast to develop and simple in production method are achieved.

There is provided a gas-barrier laminate composed of a base film and an inorganic thin film layer formed on the base film which considerably enhanced in gas-barrier property and gelbo flex resistance. The present invention relates to a gas-barrier laminate comprising a base film containing at least one compound selected from the group consisting of polyvinyl alcohol and an ethylene-vinyl alcohol copolymer, and an anchor coat layer and an inorganic thin film layer successively formed on one surface of the base film in this order, wherein the base film is in the form of a biaxially stretched film having a variation in thickness of 3.5 [mu]m or less and a crystallinity of 30% or more.

The invention discloses novel thiophenedicarboxylic acid-based copolyester as well as a preparation method and application thereof. The novel thiophenedicarboxylic acid-based copolyester has a structure represented by the following formula: wherein m, n and x are all selected from 1-200, and R is an aliphatic chain or alicyclic ring with a C atom number of 2-20. The novel thiophenedicarboxylic acid copolyester provided by the invention has the characteristics of high visible light transmittance, low melt viscosity, good heat resistance, excellent mechanical property and gas barrier property and the like, and can be widely applied to the fields of barrier films, barrier bottles, fibers, engineering plastics and the like.

A gas-barrier heat-seal composite film is provided. The gas-barrier heat-seal composite film includes a heat-seal layer including very low density polyethylene (VLDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), high density polyethylene (HDPE), metallocene polyethylene (mPE), metallocene linear low density polyethylene (mLLDPE), ethylene vinyl acetate (EVA) copolymer, ethylene-propylene (EP) copolymer or ethylene-propylene-butene (EPB) terpolymer, and a gas-barrier layer formed on the heat-seal layer, wherein the gas-barrier layer includes a plurality of composite layers, each including a polymer substrate and a single layer or multiple layers of metal or oxide thereof which is formed on one side or both sides of the polymer substrate, and the polymer substrate includes uniaxial-stretched or biaxial-stretched polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyimide (PI), ethylene / vinyl alcohol (EVOH) copolymer or a combination thereof. The invention also provides a vacuum insulation panel including the composite film.

The transparent gas-barrier laminated film of the present invention comprises at least two transparent gas-barrier films and a 1-30 micron thick adhesive layer formed on at least one of the transparent gas-barrier films.