A resin composition for a sealant, comprising an ethylene/polar monomer copolymer (A), an adhesion-imparting resin (B) and a 4-methyl-1-pentene/α-olefin copolymer (C), a content of the 4-methyl-1-pentene/α-olefin copolymer (C) being from 1% by mass to 20% by mass with respect to a total mass of the resin composition for a sealant.

A method for manufacturing a heat sealable polyester film is provided. A part of a recycled polyester material is physically reproduced to obtain physically regenerated polyester chips. Another part of a recycled polyester material is chemically reproduced to obtain chemically regenerated polyester chips. Modified polyester chips, the physically regenerated polyester chips and the chemically regenerated polyester chips are mixed to form a raw material mixture, and the modified polyester chips are formed from the recycled polyester material. The raw material mixture is used to form a heat sealable layer. A base layer is disposed onto the heat sealable layer so as to obtain the heat sealable polyester film. A heat sealing temperature of the heat sealable polyester film ranges from 120° C. to 230° C.

The rancidity of prepackaged nut products, especially, candy coated almonds, pecans, peanuts, pistachios, walnuts and cashews, is inhibited or reduced by sealingly coating the nut products with a sweetener and, thereafter, packaging the foodstuffs in a GRAS polymeric film plastic material. This enables the nut product to be exposed. to continuous heating or heating and cooling cycles such as within a conventional food warmer or exposure to heating lamps at temperatures up to about 200°F. for extended periods of up to about thirty (30) to about sixty (60) days while impeding the rancidity of the nut products.

A film is described comprises a (meth)acrylic polymer and a polyvinyl acetal (e.g. butyral) resin. In some embodiments, the film has a glass transition temperature (i.e. Tg) ranging from 30° C. to 60° C. In some embodiments, the film has a gel content of at least 20% or greater. In some embodiments, the film has an elongation at break of at least 175%. The film typically comprises photoinitiator as a result of the method by which the film was made. The film may be a monolithic film or a layer of a multilayer film.

Disclosed is a polyurethane hot-melt adhesive including: a thermoplastic polyurethane that is a reactant of a raw material including a polymer polyol, a polyisocyanate, and a chain extender, wherein X−Y≥15, where X represents a temperature (° C.) at which the polyurethane hot-melt adhesive has a melt viscosity of 2.0×10.sup.3 Pa.Math.s, and Y represents a temperature at which the polyurethane hot-melt adhesive has a melt viscosity of 1.0×10.sup.5 Pa.Math.s, and the polyurethane hot-melt adhesive has a 100% modulus of 2.5 MPa or more.

A heat sealed lid includes: a resin laminate aluminum foil; and a first seamed side frame portion and a second seamed side frame portion formed of a resin film laminate metal sheet, in which the resin film laminate metal sheet includes a metal sheet, a laminate film formed on one surface of the metal sheet, and a second resin film formed on the other surface of the metal sheet and containing a thermoplastic polyester resin, the laminate film includes an adhesion layer containing a polypropylene-based resin and a polyethylene-based resin and a base layer containing a modified polypropylene-based resin, an amount of the polyethylene-based resin in the adhesion layer is 1.0 mass % or more and 45.0 mass % or less of the resins of the adhesion layer, the melting point of the second resin film is higher than the melting point of the adhesion layer by 40° C. or more and is higher than the heating temperature of a heat sealing tool, the thickness of the adhesion layer is 1.0 μm or more and 15.0 μm or less, and the thickness of the base layer is 1.0 μm or more and 18.0 μm or less.

A foam sheet core, including a plurality of foam sheet walls defining an array of hollow cells, wherein the plurality of foam sheet walls are bonded together to form the array of hollow cells, each of the plurality of foam sheet walls has a thickness from about 0.002 inches to about 0.08 inches, and each of the plurality of foam sheet walls has an average height from about 0.05 inches to about 5 inches.

A method is for producing a coextruded and biaxially stretched composite film using a novel combination of stretching and relaxation steps. A corresponding composite film has little or no shrinkage.

A degradable EVOH high-barrier composite film, characterized in that the materials of various layers in the composite film all obtain approximately-consistent biodegradability by introducing biomass, and the additive amount of the additive master batch in the materials of each layer is controlled within the range of 0.3-15% of the total mass of the materials of the corresponding layer; the hydrophilic activity of the hydrophilic groups in the additive master batch should be greater than or equal to that of the hydrophilic groups in the materials of each layer; by adding the additive master batch, the mole ratios of the hydrophilic groups to carbon atoms of the materials of various layers tend to be consistent, namely, the bioactivities tend to be consistent, so that the degradation rates of the materials of various layers in the composite film tend to be consistent. The present invention makes contribution to obtaining approximately-consistent bioactivities and approximately-consistent biodegradation rates by balancing the mole ratios of the hydrophilic groups to carbon atoms in the materials of various layers, and the appearance, the functions and the physical and mechanical properties of a product remain unchanged.

The invention discloses a paperboard for packaging of a heat-sealable packaging material comprising: —a paperboard substrate comprising a first and a second side, —a first and an optional second dispersion coating layer on the first side, which first and optional second dispersion coating layer provides a barrier against at least one of liquid, moisture, grease and gas, —an extrusion coated barrier layer comprising a polyolefin, wherein the first and optional second dispersion coating layer is applied between the paperboard substrate and the extrusion coated barrier layer, and wherein the coat weight of the extrusion coated barrier layer is less than 15 gsm. The packaging material according of the invention minimizes the amount of plastic coating, but still provides the needed barrier properties for the packaging of food and/or liquid. The packaging material has especially been shown to provide a longer shelf life for food items packed in a packaging made from the material. Especially, the packaging material provides gas-, liquid and/or grease barrier properties. Although the packaging material comprises such low amount of extruded thermoplastic polymers, the material is readily heat-sealable.