Abstract: The present invention is drawn to a strip tape which does not undergo lowering of bonding force and which does not cause pollution of the natural environment, working environment, etc. The strip tape includes a center layer containing a polar resin, and at least one polyolefin layer laminated, via a bonding layer, on each face of the center layer. The bonding layer contains an ethylene-methacrylic acid-alkyl acrylate random copolymer. Since the strip tape includes a center layer and at least one polyolefin layer, the interlayer bonding force of the strip tape is high, the bonding strength between the center layer and the polyolefin layer can be increased, and the waterproofing property of the strip tape can be enhanced. Even when a packaging container including the strip tape is heated or cooled sharply during use, the interlayer bonding force of the strip tape is not lowered.

Abstract: To provide a laminated packaging material wherein a plant-origin material is used as the main material constituting a laminated paper packaging material for foods; a laminated packaging material being excellent in oxygen-barrier performance; a method of producing a barrier laminated packaging material in a small number of steps; a method of producing a barrier laminated packaging material whereby the structure of the laminate can be simplified without a need for a petroleum-derived adhesive and the laminate thickness can be reduced; and a method of producing a barrier laminated packaging material which is free from the occurrence of defects such as pinholes in spite of having a thin barrier layer.

Abstract: A process for producing a barrier packaging material reduces the number of processes, simplifies each of the processes per se, is relatively thin even though a multilayer, reduces the number of adhesive layers, and is advantageous in cost and environment. The process involves providing a 20 ?m to 45 ?m thick biaxially oriented film having ethylene-vinyl alcohol copolymer layers, polyamide layers directly bonded to both surfaces of the ethylene-vinyl alcohol copolymer layers and heat-adhesive polyethylene layers laminated via adherent resin layers at each external surface of the polyamide layers, subjecting to corona discharge treatment on the surfaces to be joined by poly(ethylene terephthalate) films of 5 ?m to 15 ?m thickness and the biaxially oriented film, and after the above-described treatment, performing thermocompression bonding of the treated surface to be joined by the poly(ethylene terephthalate) films and the biaxially oriented film, by means of nip rolls.

Abstract: In the manufacture of a paper container from packaging materials, damage of internal layers of packaging materials is promptly inspected, and degradation by light exposure of content can be prevented. A method of manufacturing light barrier paper packaging materials for liquid food formed from a laminate having a paper layer, a thermoplastic resin outside layer, and a thermoplastic resin inside layer include preparing a substantially completely bleached white bleached paper layer, providing a light barrier layer of light barrier material on the inside of the bleached paper layer before or during lamination of the thermoplastic resin inside layer, and inspecting for defects of the obtained laminate by observation of the visible or invisible inside surface of the bleached paper layer from the thermoplastic resin inside layer side of the obtained laminate through the light barrier layer.

Abstract: A paper packaging container is formed from the packaging material comprising constitution layers of at least an outside thermoplastic material layer, a paper substrate layer, and an inside thermoplastic material layer, wherein the inside thermoplastic material layer contains at least a linear low density polyethylene, and has properties parameters of an average density of 0.900–0.930, a predetermined peak melting point, a melt flow index of 5–15, and a swelling ratio of 1.3–1.8. The use of the packaging material allows easy filling and packaging to the packaging container and quick heat sealing, and results in more toughly and strongly sealed container, and the material can be used for achieved good sealing independently of the temperature of food contents and thus maintaining the non-scalping and quality preservability of the content product.

Abstract: A pellet to be used in a multi-layer laminate for storing liquid foods, comprising a hydrophilic reducing organic compound and a hydrophilic and water insoluble thermoplastic resin, wherein the hydrophilic reducing organic compound is kneaded with the hydrophilic and water insoluble thermoplastic resin. The kneaded compound comprised of the hydrophilic reducing organic compound and the hydrophilic and water insoluble thermoplastic resin is then kneaded with a hydrophobic thermoplastic resin and formed into a pellet. The pellet is such that 50 grams of the pellet when stored at 15° C. for one week in a sealed 180 ml container requires the presence of water in order to absorb oxygen.

Abstract: In manufacture of the paper container from the packaging materials, the damage of internal layer of packaging materials is promptly inspected, and degradation by light exposure of content can be prevented. Method of manufacturing light barrier paper packaging materials for liquid food formed from a laminate having a paper layer, a thermoplastic resin outside layer and a thermoplastic resin inside layer comprising a step of preparing substantially complete bleached white bleached paper layer of weight of 50-350 g/m2, a step of providing light barrier layer of light barrier material in the inside of the bleach paper layer before or during the lamination of the inside thermoplastic resin layer, a step of inspecting defect of the obtained laminate by observation of the visible or invisible inside-surface of the bleach layer from the inside thermoplastic resin layer side of the obtained laminate through the light barrier layer.

Abstract: This invention relates to the laminated material for food packaging, and its manufacturing process. The laminated material (10) consists of the quality keeping intermediate layer (12) laminated inside the paper core layer (11) and the core layer and the heat sealable innermost layer (13). The quality keeping intermediate layer comprises of an extrusion coatable blend polymer consisting of polymer component A 50-95% of nylon-MXD6 or EVOH and, polymer component B 5-50% of nylon 6, nylon 6, the blends or PET. The quality keeping intermediate layer is extruded and laminated directly in the core layer, the innermost layer contains at least the linear low density polyethylene which has a narrow molecular weight distribution, and has the properties parameter of mean density of 0.910-0.925, 100-122 degrees C. peak melting point, melt flow index of 5-20, swelling ratio (SR) of 1.4-1.6, and 5-50 micrometer layer thickness.

Abstract: The present invention is drawn to a strip tape which does not undergo lowering of bonding force and which does not cause pollution of the natural environment, working environment, etc. The strip tape includes a center layer containing a polar resin, and at least one polyolefin layer laminated, via a bonding layer, on each face of the center layer. The bonding layer contains an ethylene-methacrylic acid-alkyl acrylate random copolymer. Since the strip tape includes a center layer and at least one polyolefin layer, the interlayer bonding force of the strip tape is high, the bonding strength between the center layer and the polyolefin layer can be increased, and the waterproofing property of the strip tape can be enhanced. Even when a packaging container including the strip tape is heated or cooled sharply during use, the interlayer bonding force of the strip tape is not lowered.

Abstract: The present invention teaches (1) a composition for packaging aqueous liquid foods in which a hydrophilic reducing organic compound or an organic compound and a porous inorganic compound are dispersed in a hydrophobic thermoplastic resin by means of a hydrophilic and water insoluble thermoplastic resin, (2) a laminate for packaging the foods having an innermost layer or a layer adjacent to the innermost layer made of such composition, and (3) a laminate for packaging the foods having an innermost layer or a layer adjacent to the innermost layer made of a hydrophobic thermoplastic resin into which is dispersed a porous inorganic compound supporting an ascorbic acids.

Abstract: A container comprised of a plastic-paper laminate obtained by laminating a layer comprised of a plastic composition containing 100 parts by weight of a linear low density polyolefin and 10 to 20 parts by weight of a norbornene-based polymer on at least one surface of a paper base is provided. This container is superior in heat resistance, heat sealability, and low moisture permeability making it suitable for packaging food and beverages.