Abstract: A method of preparing a rosin baked potato by wrapping a whole potato in a wrapper formed from a rosin impregnated cellulosic substrate laminated to a flexible sheet and having perforations provided to allow steam to vent as the potato is baked in a heating apparatus.

Abstract: A multi-layer container suitable for use in microwave cooking of food comprising a substrate layer of a thermoplastic polymer that is not suitable for contact with foods or hot foods, and an inner protective layer designed to contact the food, said inner layer comprising a blend of a styrene/maleic anhydride copolymer and a polymer selected from the group consisting of polystyrene, rubber modified polystyrene, polymethyl methacrylate, rubber modified polymethyl methacrylate, polypropylene, and mixtures thereof.

Abstract: Retortable high panel strength plastic containers have a recessed circular center portion in the bottom wall of the container which facilitates the volumetric changes in the container during a sterilization process. Examples of containers having this feature are disclosed as well as the cross-sectional profile of the recessed circular center portions of the bottom walls of the containers.

Abstract: A wrapper for preparing a rosin baked potato by wrapping a whole potato in a wrapper formed from a rosin impregnated absorbent cellulosic substrate laminated by rosin to a flexible sheet and allowing melted rosin to be retained around the potato as the potato is baked in a heating apparatus.

Abstract: A laminate providing an effective barrier to migration of essential oils and flavorings and for retention of vitamin C, essential oils and flavor in a juice and cartons made therefrom, wherein the laminate comprises, from the outer surface to the inner surface contacting the juice: an outer polyethylene layer for heat sealing and graphics, a bleached sulfate paperboard substrate, a nylon barrier layer constituting a barrier for oxygen, a first tie layer of modified polyethylene acting as an adherent, another polyethylene layer acting as a heat seal layer and bonded to the nylon barrier layer by the first tie layer, a second tie layer acting as an adherent, and an inner skin layer, which contacts the contents of the carton, which is bonded to the polyethylene layer by the second tie layer, and which may be ethylene vinyl alcohol copolymer (EVOH), polyethylene terephthalate or nylon.

Abstract: A package is provided for enclosing a proteinaceous product under vacuumized and hermetically sealed conditions. The package has a peelable hermetic reclosure and a body member of semi-rigid preformed plastic with a first planar marginal portion and a central portion shaped to provide a packaging chamber. The package also has a flexible dimensionally stable base member having a corresponding second planar marginal portion and a central portion to provide a closure for said packaging chamber. The two planar marginal portions are adhered together face-to-face by an adhesive to provide at least a portion of the hermetic seal wherein said adhesive is a high molecular weight pressure sensitive hot-melt adhesive having a viscosity of between about 5,000 and about 100,000 centipoise at 300.degree. F. and said adhesive provides a peelable hermetic reclosure.

Abstract: A film comprising alternating layers of polyvinylidene chloride resin and a solvent barrier such as polyvinyl alcohol provides superior barrier properties. Barrier and mechanical properties are enhanced when formulation additives are present at customary levels only in the outermost layers.

Abstract: A multi-ply, heat-shrinkable film has a surface layer for contact with a cooked or processed meat product which is formed of an ethylene-ethyl acrylate-maleic anhydride copolymer or a mixture of the ethylene-ethyl acrylate-maleic anhydride copolymer and a polyolefin, with the content of ethyl acrylate component in the surface layer being 2 to 20% by weight and the content of maleic anhydride component being 1 to 5% by weight. A cooked or processed meat product may be packaged with the multi-ply, heat-shrinkable film and formed according to "zero-loss cooking method".

Abstract: An adhesively laminated composite plastic film comprising at least two layers of preformed plastic film adhered together by means of an adhesive material disposed therebetween but having preselected areas which contain neither the adhesive nor anything else which is incompatible with said plastic is disposed between the layers of plastic film or on the surfaces thereof. The composite is quite usable for forming into plastic bags by either folding the composite film upon itself and heat sealing the meeting edges, or by superposing the composite film with at least one other plastic film, which may itself be a composite film, and then heat sealing the meeting edges. The preselected areas which are devoid of adhesive correspond to the heat seal areas.

Abstract: A composite integral sheet of wrap material which includes a first layer of absorbent material, a second layer of printable material and an impermeable pigmented polymer layer interposed between the first and second layers. The composite wrap material has a plurality of air pockets formed between at least one of the first or second layers and the polymer layer, by discontinuously bonding the first or second layers to the polymer material. A method of making the composite integral sheet.

Abstract: A laminated material for the manufacture of packing containers with good gas and aroma barrier properties and or parts for such containers, and a method for the manufacture of the laminated material (1).The laminated material (1) comprises a first partial laminate (1) comprising a carrier layer (2) of thermoplastics and a barrier layer (3) of inorganic material of 50-500 .ANG. thickness serving as a gas and aroma barrier and a second partial laminate (1b) comprising a carrier layer (4) and a barrier layer (5) of inorganic material of 50-500 .ANG. thickness serving as a gas and aroma barrier, these partial laminates being joined to one another by means of an intermediate layer (6) of bonding agent, their respective barrier layers facing inwards towards one another.

Abstract: The present invention is directed to a cling packaging film for use in wrapping food products, particularly fresh meat and produce. The film comprises a core layer containing a copolymer of ethylene and an ethylenically unsaturated polar comonomer together with an elastomeric polymer. The film further comprises a skin layer containing linear low density polyethylene. Both the core and skin layers may contain additional components. A film in accord with the present invention compares favorably with PVC food wrap film and is intended to provide a replacement therefor.

Abstract: A multilayer laminate comprises a machinable inner component perforated film, preferably of a propylene homopolymer or copolymer, a first outer component film bonded to one side of the inner component film, and a second outer component film bonded to the opposite side of the inner component film, each of the first and second outer component films providing high gas permeability and low moisture transmission and including a bonding layer of ethylene copolymers and an outer heat sealable layer.

Abstract: A laminate comprising(A) a layer of a 4-methyl-1-pentene polymer,(B) a layer of a polymer composition comprising(a) 40 to 98% by weight of an ethylene/alpha-olefin random copolymer containing 30 to 95 mole % of ethylene units,(b) 0.1 to 20% by weight of a polyolefin modified with an unsaturated carboxylic acid or its derivative, and(c) 1 to 50% by weight of a tackifier, the proportions of components (a), (b) and (c) being based on the total weight of components (a), (b) and (c), and(C) a layer of a thermoplastic resin, the layers (A), (B) and (C) being laminated in the sequence stated.

Abstract: A food packaging material suitable for a variety of food service applications, including fast food restaurants is provided. The packaging is preferably formed from a flexible laminate sheet that includes at least one moisture impervious layer and has been formed into a receptacle having a shape suitable for enclosing and sealing fast food sandwiches and the like. Attached to the sheet is a length of rip cord having at least one free end that can be grasped and pulled by the consumer to tear the laminate sheet, thereby opening the sealed food-containing receptacle. The rip cord can be attached so that it causes one portion of the receptacle to be partially or completely separated from a remaining receptacle portion. The separated portion of the receptacle can be folded out of the way or discarded, and the remaining receptacle portion used to enclose the food product to form a convenient pouch for protecting the consumer's hands while holding the food product.

Abstract: A multi-layer material with a layer (A) of a saponified product of an ethylene-vinyl acetate copolymer having an ethylene content of 20 to 60 mol % and a degree of saponification of at least 90% and a layer (B) of a styrene-based polymer having mainly syndiotactic configuration, or a resin composition comprising 5 to 95 parts by weight of a saponified product of an ethylene-vinyl acetate copolymer (A) having an ethylene content of 20 to 60 mol % and a degreee of saponification of at least 90% and 95 to 5 parts by weight of a styrene-based polymer (B) having mainly syndiotactic configuration has gas barrier properties and markedly improved heat resistance.In a molding comprising the resin composition or the multi-layer material, contents (food) can be stored for a long period of time at ambient temperature. Moreover, after retort sterilization, the container can be heated by boiling, or in a microwave oven or a grill oven (at 220 to 240.degree. C.

Abstract: A coated sheet material is provided for wrapping, packaging or shipping food articles that are to be heated in a microwave oven. The sheet is formed from a paper or paperboard backing which is thermally and dimensionally stable when exposed to microwave energy. On at least one side is provided a smooth calendered surface or the sheet material is treated by processing as with a filler coating to fill the voids between the paper fibers and to thereby present a smooth surface. A microwave interactive layer is applied to the smoothed surface from a fluid or vapor state. The interactive coating can comprise carbon, a semiconductive metal coating or other microwave interactive material.

Abstract: This invention provides a gas-barrier multilayered packaging material which comprises an outer layer of a composition comprising 55-97 wt % of an EVCOH and 45-3 wt % of a resin selected from the group consisting of polyamide, polyolefin, polyester and polycarbonate and an inner layer comprising a hydrophobic thermoplastic resin having a low moisture permeability; and further provides a gas-barrier multilayered packaging material which comprises an outer layer comprising a resin layer having a moisture permeability (measured at 40.degree. C., 90% RH) of at least 40 g/m.sup.2 day, an intermediate layer of a composition comprising 55 to 97% by weight of an EVOH and 45 to 3% by weight of a resin selected from the group consisting of polyamide, polyolefin, polyester and polycarbonate and an inner layer comprising a hydrophobic thermoplastic resin layer having a moisture permeability lower than that of the outer layer.

Abstract: A food packaging material that has a plurality of porous polymeric beads impregnated with an anti-oxidant, or oxygen scavenger compound.

Abstract: An improved microwavable package of laminar construction, having its inner layer constructed of a film whose inherent seal strength is sufficiently high that the inside of the package need not have extraneous reinforcement to maintain its integrity filling, storage, distribution and cooking. The microwavable package is ventable and easily opened by virture of a strip of heat sealable adhesive coated along its top edge immediately inside the opening of the bag and having a seal strength less than that of the package formed seals, to mask the package's normal seal strength.

Abstract: A reclosable package comprising interlocking closure strips positioned outside of a hermetic seal or seal area and the method for producing same. The hermetic seal is of the easy-open or peelaway type so as to not destroy the integrity of the package or closure strips upon opening of the package.

Abstract: A flexible multilayer film tube has an inner layer comprising a blend of thermoplastic polymer and starch particles in protruding relationship with the inside surface which, after oxidation, develops improved meat adhesion during in situ cooking.

Abstract: A method and apparatus for crisping the surface of a food substance in a microwave oven is disclosed. A thin film susceptor is positioned close to the surface of a food substance. The susceptor heats when it is exposed to microwave radiation. The susceptor preferably is a thin film of metal deposited on a polyester substrate layer. In one embodiment, heating the susceptor causes the polyester layer to shrink, thereby simultaneously creating openings in the susceptor to allow moisture to escape, and breaking the conductivity of the susceptor so that it becomes less responsive to microwave radiation and substantially "turns off." In an alternative embodiment, passageways are pre-cut in the thin film of metal. A single surface of the food substance is made crisp in this manner, while the opposed surface is exposed to the microwave oven atmosphere.

Abstract: A polymer blend comprises a skin polymer, an ethylene-vinyl alcohol copolymer and a poly-2-oxazoline. The polymer blend possesses good gas barrier properties and excellent mechanical strength. A particularly preferred blend comprises an improved reclaim layer of a six-layer composite sheet suitable for thermoforming into a food package.

Abstract: An easily opened package is made by heat sealing a first web to a second web. The sealing layer of the first web is a blend of polybutene and polypropylene with a third polymeric material of ethylene vinyl acetate copolymer. Low density polyethylene, linear low density polyethylene, or ionomer. The sealant layer of the second web is ethylene vinyl acetate copolymer, low density polyethylene, linear low density polyethylene or ionomer.

Abstract: A seamless, bone puncture resistant bag is provided that representatively includes a length of lay-flat seamless tubular film folded to a double lay-flat configuration and having all adjacent film surfaces interfacially bonded, respectively, except at one outermost interface. The configuration thus forms a seamless envelope with one face thickened integrally to triple thickness. In a less preferred mode, a similarly reinforced bag is provided but which has either an end-seal or side-seals. Associated methods for making such bags are also provided.

Abstract: A composite material useful for controlled generation of heat by absorption of microwave energy is disclosed. The material comprises a dielectric substrate, e.g., polyethylene terephthalate film, coated with a mixture of an electrically conductive metal or metal alloy in flake form in a thermoplastic dielectric matrix, e.g., a polyester copolymer. In a preferred embodiment, the coating of flake/thermoplastic is applied so as to yield an isotropic coating with good heating performance reproducibility. The use of circular flakes with flat surfaces and smooth edges contributes substantially to good heating performance reproducibility.

Abstract: A reclosable package comprising interlocking closure strips positioned outside of a hermetic seal or seal area and the method for producing same. The hermetic seal is of the easy-open or peelaway type so as to not destroy the integrity of the package or closure strips upon opening of the package.

Abstract: A coating sheet material is provided for wrapping, packaging or shipping food articles that are to be heated in a microwave oven. The sheet is formed from a paper or paperboard backing which is thermally and dimensionally stable when exposed to microwave energy. On at least one surface is provided a smooth supercalendared surface or the sheet is treated by processing as with a filler coating to fill the voids between the paper fibers and to thereby present a smooth surface. A microwave interactive layer is applied to the smoothed surface from a fluid or vapor state. The interactive coating can comprise carbon, a semiconductive metal coating or other microwave interactive material.

Abstract: A reclosable package comprising interlocking closure strips positioned outside of a hermetic seal or seal area and the method for producing same. The hermetic seal is of the easy-open or peelaway type so as to not destroy the integrity of the package or closure strips upon opening of the package.

Abstract: A dual ovenable paperboard based structure which contains a food contact resin layer. The resin layer in direct contact with the ovenable food product exhibits superior food release properties, grease and oil resistance, and resistance to warpage even after extended periods of time following oven heating. The unique laminate is formed via coextrusion coating techniques on conventional coextrusion equipment at conventional temperatures. The resulting product has a high degree of adhesion between the paperboard and the polymethylpentene food contact layer, and is capable of being utilized for forming pressed or locked corner food trays which can be subjected to oven cooking temperatures.

Abstract: In order to reduce splitting in a perforated, heat shrinkable, thermoplastic bags made from seamless tubing, rather than employ needle punched perforations, it has been discovered that slits cut by a knife blade will surprisingly reduce the splitting when a product, such as a meat product, is cooked within the bag.

Abstract: An article of polyethylene terephthalate resin, particularly a laminated wall structure of a bottle made by biaxial orientation blow molding from the resin. The laminated wall is made up of polyethylene terephthalate resin and a synthetic resin material having good gas barrier properties.

Abstract: A barrier structure liner for food packages comprises two layers of EVOH (ethylene-vinly alcohol copolymers), one of which is interposed between two moisture barriers. The inner layer of EVOH (in contact with the packaged food) functions as a solvent barrier which reduces the loss of flavor components from the foods, while the buried EVOH layer, protected from moisture from the packaged food and the outside atmosphere, serves as an oxygen barrier to prevent oxygen from outside the package from oxidizing the foods within the container. The barrier structure may be used in paper cartons, plastic bottles, bags and the like.

Abstract: A multilayer film is provided in the form of an extruded sheet for food wrapping and cooking procedures. The film is made up of alternating layers of a first generally ductile material and a second generally brittle material. Upon wrapping a food item or container, the film exhibits dead fold and/or twistability characteristics. In one embodiment, the materials of the film are chosen to have softening points above about 450 degrees F. so that the film can be used in conventional ovens.

Abstract: This invention relates to films made from vinylidene chloride copolymers. Specifically, this invention relates to a method and compositions for lowering the oxygen permeability and enhancing the thermal stability and enhancing the melt shear stability of monolayer and multilayer packaging films having a layer of vinylidene chloride copolymer film by adding an organic silicon polymer to the vinylidene chloride copolymer. The conventional stabilizer/plasticizer combination of epoxy resin and 2-ethyl-hexyl diphenyl phosphate may be eliminated from the vinylidene chloride copolymer.

Abstract: This invention relates to a co-extruded multilayer film and particularly for vacuum packaging food products. The film comprises at least one layer formed by ethylene-vinyl acetate-copolymer with a vinyl acetate content preferably comprised between 9% and 26% range by weight. The film is preferably radiated at a lower level than 20 MRad. The film is adaped to resist high stretch ratios during the packaging process, so that packaging of bodies with projecting portions or cavities is possible, without breaking the film.

Abstract: A food package for cooking of the food in a microwave oven is formed of a heat-resistant synthetic resin impermeable to oil and moisture and has at least one opening for allowing steam to escape when the internal pressure in the package is increased beyond a certain value by the steam generated during heating. The number of openings and the size of each opening are selected with consideration of the package volume or size and the type of food to be packaged so as to adjustably maintain within the package a pressure and a temperature each of which are within a range of predefined values during cooking in the oven. The package distends with increase of the internal pressure to provide a visual indication that cooking is complete. A method of cooking the packaged food comprises using the described package which adjustably maintains the internal pressure in the package within the range of about 1.00 to about 1.15 atm and the temperature within the range of about 100.degree. to about 105.degree. C.

Abstract: An anti-fogging multilayered film suitable for packaging fresh vegetables and fruits comprising a base layer and at least one surface layer containing an anti-fogging agent, said film having a water vapor transmission of 15 to 200 g/m.sup.2 .multidot.24 hr.multidot.40.degree. C., an oxygen permeability of 3,000 to 35,000 cc/m.sup.2 .multidot.24 hr.multidot.atm.multidot.20.degree. C..multidot.90% RH, and a carbon dioxide permeability of 12,000 to 130,000 cc/m.sup.2 .multidot.24hr.multidot.atm.multidot.20.degree. C..multidot.90% RH, and said anti-fogging surface layer having heat sealing properties. A packaging bag produced from this film is also disclosed.

Abstract: A vacuum skin package for packaging fresh red meat and like articles is produced by using a composite, multilayer, oxygen barrier, vacuum skin package forming film in which the barrier layer can be manually separated from the non-barrier, oxygen permeable layer. After the vacuum skin package is formed to enclose a fresh red meat product in a vacuum the meat will have a purplish color. Then, after storage, the barrier layer can be removed so that the remaining permeable film can admit oxygen to impart the desirable red bloom to the fresh meat. Of importance is the "tear through" feature of the permeable inner layer which has a greater bond strength to the tray than internal strength or layer-to-layer bond strength so that a tab may be torn loose at a score line and then the barrier layer may be readily delaminated and peeled from the permeable layer.

Abstract: The present disclosure is directed to a flexible delamination-resistant structure especially adapted for use in food packaging, such as in the construction of a retortable pouch. The structure comprises at least two adjacent films, at least one of which is aluminum, having interposed therebetween, as an adhesive for said films, a partially hydrolyzed ethylene-vinyl acetate copolymer obtained from the hydrolysis of from about 60 percent to about 80 percent of the vinyl acetate groups of an ethylene-vinyl acetate copolymer containing from about 30 percent to about 60 percent by weight of interpolymerized vinyl acetate.

Abstract: A storage receptacle provided with a receptacle body opened on its upper side, a covering member for covering the opening portion of the receptacle body and a permeable film member having a permeability to gases and a moisture permeability from 1500 to 3500 g/m.sup.2 .multidot.24 hr and formed at least on a portion of the receptacle body or covering member.

Abstract: A package of shrunken heat-shrinkable flexible film conformed to a contained food product has no gap or virtually no gap between the food product and the shrunken film. Prior to heat shrinking, the package is subjected to non-ionizing radiation.

Abstract: The present invention relates to an improved composite barrier laminate for an improved container for citrus juices and other liquids. The container utilizes a paperboard barrier laminate for the containment of essential oils and the prevention of losses of vitamin C. The laminate makes use of an inner barrier layer of a heat-sealable oxygen and flavor oil barrier material to enhance the barrier properties of the laminate as well as an extremely thin low density polyethylene food contact layer to provide a resultant secure homogenous non-polar heat seal.

Abstract: Disclosed is a multiple-layer film having a support film, a first double film laminated thereto, which is formed from a single-ply blown tube collapsed by atmospheric pressure. The support film and the double film laminated thereto are perforated with pinholes. On the side opposite the support film the double film is laminated to a barrier film and the latter is laminated to a weldable layer of film.

Abstract: A flexible laminate film for packaging hygroscopic products, including foods, is disclosed in which the packaged contents do not adhere or stick to the inner surface of the package. The inner layer of the package laminate provides the anti-stick characteristic of the package and comprises a polystyrene foam.

Abstract: The present invention relates to an improved container for food and non-food products. The container utilizes a novel paperboard barrier laminate structure which maintains an isolated gas environment in the container. The laminate makes use of high strength, heat-resistant and caulking polymer layers which prevent pinholes, cuts, or cracking of the barrier layers during blank conversion, package formation, and package distribution. In addition, the novel polymer resin layers act to caulk the seams and channels present in the carton providing a sealed leak free container.

Abstract: An improvement in a packaging multilayer plastic container comprising a gas-barrier interlayer of an ethylene/vinyl alcohol copolymer and an inner and an outer layer of a moisture-resistant thermoplastic resin such as a polyester sandwiching the interlayer. An intermediary layer comprising particles of a high water-absorbing resin dispersed in a resinous medium is provided between the gas-barrier layer and each of the inner and outer layers. Crosslinked polyacrylic acid or its salt or a vinyl alcohol/acrylic acid (salt) block copolymer, for example, may be used as the highly water-absorbing resin. Because of its high saturation moisture absorption at high temperatures, the highly water-absorbing resin is effective for preventing degradation of the gas-barrier property of the ethylene/vinyl alcohol copolymer during retorting.

Abstract: A cooked meat product is prepared using a tube of multilayer film comprising at least three layers including an inner layer with an inner surface, the latter comprising EVA with starch particles dispersed across the inner surface and integral therewith, the starch particle-containing EVA layer being irradiated. Uncooked meat is stuffed in the tube and during cooking the meat outer surface adheres to the tube inner surface.

Abstract: A container capable of creating within it preselected CO.sub.2, O.sub.2, and moisture concentrations in the presence of respiring fresh fruit, vegetables, or flowers is constructed of a substantially gas-impermeable material having a gas-permeable panel that is substantially impermeable to moisture in one or more of its walls to provide a controlled flow of CO.sub.2 and O.sub.2 through its walls and a cellophane panel that is substantially impermeable to the flow of CO.sub.2 and O.sub.2 in one or more of its walls to provide a controlled flow of moisture through its walls. The gas-permeable panel is a uniaxially or biaxially oriented film where the size of the area it covers is a function of its permeance, the amount and respiration rate of the contents, and the desired steady-state oxygen concentration. The size of the cellophane panel is a function of its permeance to water vapor and the desired rate of removal of water vapor from the package.