232results about How to "Excellent oxygen barrier properties" patented technology

A polymer composition and its use for thin film packaging applications including on a dry basis: a) from 45 to 90% by weight of starch; b) from 0.1 to 15% by weight of a water soluble polymer selected from polyvinyl alcohol, polyvinylacetate, and copolymers of ethylene and vinyl alcohol which have a melting point compatible with the molten state of the starch component; and c) from 5 to 45% by weight of one or more plasticizers having a molecular weight in the range of 50-6000, more preferably 50-2500 and more preferably still 100-400 and desirably selected from the group consisting of sorbitol, glycerol, maltitol, xylitol, mannitol, erythritol, glycerol trioleate, tributyl citrate, acetyl tri-ethyl citrate, glyceryl triacetate, 2,2,4-trimethyl-1,3-pentanediol diisobutyrate, polyethylene oxide, ethylene glycol, diethylene glycol or polyethylene glycol.

The present invention is directed to film coating systems for use on oral dosage forms such as compressed tablets and orally-ingestible substrates which have improved pearlescent qualities. The film coating systems can be applied either directly to a substrate or after the substrate has been coated with a subcoat. In preferred aspects, the pearlescent film coating is prepared as a dry powder mixture containing a cellulosic polymer, a detackifier, a gloss enhancer, and a pearlescent pigment. Film coating compositions containing an aqueous suspension of the powder mixtures, methods of applying the coatings to substrates and the coated substrates are also disclosed.

The present invention discloses a polylactic acid alloy membrane, which comprises polylactic resin, polyvinyl alcohol resin and a bulking agent, wherein the three are in parts by weight of 1to 99 parts, 1 to 99 parts and 0.05to 5 parts respectively, with the total account of polylactic resin and polyvinyl alcohol resin in parts by weight of 100 parts. By the invention, the oxygen barrier property of the polylactic acid alloy membrane is effectively improved under the premise of keeping the membrane completely biodegradable and providing the membrane high mechanical strength. The technology method provided by the invention is easy with low cost, and is able to effectively promote widespread use of the environmentally friendly polylactic acid products.

The invention discloses a polyvinyl alcohol/graphene oxide composite film preparation method. The method is carried out in the following steps: preparing a graphene oxide colloidal suspension liquid; preparing a polyvinyl alcohol and graphene oxide dispersion solution; coating a mould and non-isothermally drying; and demoulding so as to obtain a polyvinyl alcohol/graphene oxide composite film. A coating technology and a non-isothermally drying method are utilized to prepare the polyvinyl alcohol/graphene oxide composite film, the method has not only high safety but also good environment friendliness; moreover, the oxygen permeation coefficient of the composite film is reduced by 95.8 to the maximum extant, so that the composite film has ultrahigh oxygen barrier property and can satisfy the packaging requirements of various foods, pharmaceuticals and other products, and a problem that the polyvinyl alcohol/graphene oxide composite film prepared by the prior art has poor oxygen barrier property is solved; and the method is simple in technology and low in cost and has great application and popularization values.

A tube container having a barrier property is provided. A single-layer or 3-layer tube container is manufactured by molding a dry-blended composition including a polyolefin resin and a nanocomposite of a resin having a barrier property and an intercalated clay, and a compatibilizer. The single-layer or 3-layer tube container can be simply manufactured and has a superior barrier property, thereby preventing the decomposition of contents, compared to a conventional 5-layer tube container.

The present invention provides a multilayer film having an active oxygen barrier and at least one layer containing an iron-based oxygen scavenging composition. In one embodiment, the active barrier layer comprises a composition that is a blend of a thermoplastic resin (A) having carbon-carbon double bonds substantially in its main chain, a transition metal salt (B), and an oxygen barrier polymer (C). In some embodiments the active barrier layer may also include a compatibilizer (D). The layer containing the iron-based oxygen scavenging composition helps to maintain the oxygen barrier properties of the active barrier layer, and under both retort and non-retort conditions. As a result, the useful shelf life of the multilayer film can be extended.

PCT No. PCT/SE96/01320 Sec. 371 Date Apr. 14, 1998 Sec. 102(e) Date Apr. 14, 1998 PCT Filed Oct. 17, 1996 PCT Pub. No. WO97/14629 PCT Pub. Date Apr. 24, 1997The disclosure relates to a laminated packaging material (10) comprising a core layer (11) of paper or paperboard and a layer (12) of polyvinyl alcohol serving as oxygen gas barrier on one side of the core layer. In order to avoid excessively large quantities of polyvinyl alcohol on application of the oxygen gas barrier layer (12), a layer (13) is applied which serves as a binder and consists of a mixture of polyvinyl alcohol and a gel-forming substance, for example agar, between the polyvinyl alcohol layer (12) and the core layer (11), with the aid of which excessive penetration of polyvinyl A alcohol into the core layer (11) is effectively counteracted, at the same time as the applied binder layer (13) smoothes and evens out the coarse surface structure of the core layer (11) and forms a smooth substrate for the polyvinyl alcohol layer (12). The quantity of gel-forming substance in the binder layer (13) may amount to between 1 and 20 per cent of the total weight of the mixture.

The present invention concerns a method of preparing a film of nanofibrillated cellulose (NFC) on at least one surface of a support material, wherein the film is applied and spread directly onto a surface of the plastic support material in the form of a suspension of nanofibrillated cellulose, whereby the nanofibrillated cellulose forms a film. Further, the invention concerns a structure containing or consisting of a film of nanofibrillated cellulose prepared using said method.

A non-foil packaging laminate for liquid food packaging comprises a core layer of paper or paperboard, outermost liquid tight, heat sealable layers of polyolefin and, applied onto the inner side of the layer of paper or paperboard, and an oxygen gas barrier layer formed by liquid film coating of a liquid gas barrier composition and subsequent drying. The liquid composition contains a polymer binder dispersed or dissolved in a liquid medium. The disclosure also involves a method for manufacturing of the packaging laminate and a packaging container made from the packaging laminate.

Provided is a continuous production method of a polyamide with stabilized polymerization degree and good quality, particularly an aromatic-containing polyamide. A continuous production method of a polyamide, comprising (a) a raw material preparation step of individually melting a diamine and a dicarboxylic acid, or producing a salt of amine and carboxylic acid in water, (b) a raw material introduction step of continuously introducing the prepared raw materials into a tubular reaction apparatus, (c) an amidation step of passing the introduced raw materials through the tubular reaction apparatus, thereby effecting amidation to obtain a reaction mixture containing an amidated product and a condensed water, (d) an initial polymerization step of introducing the reaction mixture into a continuous reaction apparatus capable of separation and removal of water, and elevating the polymerization degree while separating and removing water at a temperature higher than the melting point of the finally obtained polyamide to obtain a polyamide prepolymer, and (e) a final polymerization step of introducing the polyamide prepolymer into a continuous reaction apparatus capable of separation and removal of water, and further elevating the polymerization degree at a temperature higher than the melting point of the finally obtained polyamide to obtain a polyamide adjusted to a desired relative viscosity [RV].

Oxygen barrier films having a greatly improved dynamic coefficient of friction, and specifically, oxygen barrier films having an exceptionally low dynamic coefficient of friction, reduced moisture sensitivity and good oxygen barrier properties over a wide range of relative humidities. The low coefficient of friction is obtained by using film layers which are blends of a polyamide component and a high density polyethylene which surround an oxygen barrier layer, such as an ethylene vinyl alcohol layer.

The purpose of the invention is to provide a high-transparency light-emitting material of sufficient durability to minimize long-term degradation of semiconductor nanoparticles due to oxygen, etc.; and a method for producing said material. This light-emitting material is characterized in containing semiconductor nanoparticles, a metal alkoxide, and a silicon compound.

A non-foil packaging laminate for liquid food packaging comprises a first layer of paper situated towards the inner side of the packaging laminate and a second layer of paper situated towards the outer side of the packaging laminate, with the first and second paper layers laminated to each other by a first intermediate bonding layer in a sandwich structure. The packaging laminate further comprises a gas barrier coating layer, coated onto the inner side of the first paper layer by liquid film coating of a liquid gas barrier composition onto the first paper layer and subsequent drying, the liquid composition containing a polymer binder dispersed or dissolved in an aqueous or solvent medium, and a further barrier layer towards water vapour laminated and bonded to the barrier-coated inside of the first paper layer. Also disclosed is a method for manufacturing the laminate, and a packaging container made from the laminate.

The present invention relates to a gas barrier film where a polyurethane type resin layer and an inorganic layer are disposed in this order from a polyester type resin film side on at least one surface of a polyester type resin film, wherein the polyurethane type resin constituting said polyurethane type resin layer is a resin containing a skeleton represented by the following formula (1) and/or the following formula (2).

The present invention provides a gas barrier film having excellent oxygen insulation and water vapor insulation.

The invention discloses transparent gas barrier film materials and a production method thereof. A large length-diameter ratio of hydrotalcite nano-sheet serves as a precursor, the hydrotalcite whish is of a two-dimensional layered structure and various commercial packaging polymer raw materials are composited into a film by a simple suction filter deposition film forming technology, a diffusion path of gas molecules in the composite film can be significantly extended due to the large length-diameter ratio and the two-dimensional ordered structure of the hydrotalcite, and accordingly the barrier performance of the film materials is further improved. The finally produced transparent gas barrier film is ultra-low in oxygen transmissibility in comparison with a detection limit of an instrument and accordingly the problem that the requirement of the current barrier packaging field for the oxygen resistance performance of materials is high can be solved. According to the suction filter deposition film forming method, the production is simple, the raw material sources are wide, the material selection is convenient, the cost is low, and the environment-friendly and sustainable development requirements are met in comparison with the traditional method and accordingly the transparent gas barrier film materials comprise the potential application value in the fields of food, medicine packaging, electronic device packaging and the like.

The present invention relates to barrier films or sheets comprising cellulose nanofibrils and to laminated packaging materials comprising such films, in particular intended for liquid food packaging.

The invention also relates to a packaging container comprising the laminated packaging material or being made from the laminated packaging material, in particular to a packaging container intended for liquid food packaging.

A non-foil packaging laminate for liquid food packaging comprises a core layer of paper or paperboard, outermost liquid tight, heat sealable layers of polyolefin and, applied onto the inner side of the layer of paper or paperboard, an oxygen gas barrier layer formed by liquid film coating of a liquid gas barrier composition and subsequent drying, the liquid composition containing a polymer binder dispersed or dissolved in a liquid medium. The laminate further comprises a layer of a polyolefin-based matrix polymer with inorganic filler particles distributed therein and inorganic particles dispersed also in the gas barrier layer from the liquid gas barrier composition. Also disclosed is a method for manufacturing the packaging laminate and a packaging container made from the packaging laminate.

A film forming composition and a polymeric film or coating comprising hemicellulose and at least one component selected from the group consisting of plasticizers, cellulose, and an oligomer or polymer, is disclosed, said polymeric film or coating further comprising at least one additive/reactant increasing the liquid/moisture resistance and mixed with and/or reacting with the hemicellulose and said at least one component before or in conjunction with the forming of the film or coating. The use of said film or coating is also disclosed. Further, a method for the manufacture of said polymeric film or coating is disclosed, as well as a method for improving the liquid/moisture resistance of hemicellulose. Said at least one additive/reactant increasing the liquid/moisture resistance is either a cross-linking agent or a hydrophobizing agent. In another preferred embodiment the additive is a 2:1 layered phyllosilicate. The additive forms a nanocomposite with the hemicellulose as a matrix. The hemicellulose/phyllosilicate nanocomposite reinforced material provides excellent liquid/moisture resistance. Heat treatment of all of the films increases their liquid/moisture resistance and reduces their oxygen permeability.

A laminated packaging material for liquid-tight, dimensionally stable packages has superior gas-barrier properties, particularly oxygen barrier properties. The laminated packaging material includes a core layer and a barrier layer juxtaposed to the core layer. The barrier layer is formed from a polyvinyl alcohol, a polysaccharide and a cross-linking agent, the polysaccharide being chitosan and the cross-linking agent being a dialdehyde compound. A method for making the laminated packaging material is also disclosed.