Abstract: A sealed package, and a method of heating a sealed package of material are disclosed wherein the material is capable of generating vapor from a substance contained therein when the temperature of the material is raised. At least a portion of the packaging structure comprises a plastic film. Thermal energy is applied to the material causing the plastic film to be displaced by generated vapor. After the film is displaced, a vent hole appears in the film, venting the vapor without substantial rupture of the film.

Abstract: A method is provided for enhancing yield of a cook-in packaged food product that includes first providing an adhering cook-in package comprising a flexible plastic container being substantially conformable to a selected food product and having an inner surface of polymeric olefin having been subjected to an adhering surface treatment in the presence of oxygen, then conforming said package about a selected food product and cooking the packaged product, whereupon said inner package surface adheres to said food product to substantially prevent cook-out of fluids therefrom.

Abstract: Potato pieces or strips prepared by washing, peeling, and cutting raw potatoes are immersed in an aqueous solution of an antioxidant and a texture enhancing agent, washed, drained, prefried for partial drying in deep edible oil thereby to reduce their water content by 10 to 20 percent by weight, packaged, gas-tightly sealed under vacuum in a bag made of a laminated sheet comprising a thermoplastic resin film and an aluminum foil, and then sterilized by heating under pressure. The preprocessed potato pieces thus produced can be preserved for a number of months while being stored and distributed at room temperature and require only a few minutes of final frying in deep oil or fat for consumption.

Abstract: The disclosure relates to a multi-layer snack food packaging material particularly suitable for forming potato chip bags and the like. The material comprises an outer layer of polypropylene, a low density polyethylene laminator and an inner layer which is, itself, a coextrusion. The inner coextruded layer comprises a first layer of high density polyethylene, a second layer of polypropylene and a third layer of ethylene methyl acrylate. The ethylene methyl acrylate is coated with an emulsion of polyvinylidene chloride, which seals the inner layers together upon application of heat. The package has many advantageous characteristics for use in snack food packaging and does not require glassine. The material has excellent oxygen and moisture barrier properties, good stiffness, good grease resistance and bond strength appropriate for easy opening by the consumer.

Abstract: A deep stretch forming process for producing low distortion, biaxially oriented, heat set, hermetically sealable hollow containers of high molecular weight saturated linear polyesters comprised of deep stretching an injection molded heated contoured preform into a hollow die by means of a heated forming plunger, annealing or heat setting and then cooling the formed hollow container prior to said containers removal from said die.

Abstract: Flexible packaging material suitable for making peelable form-fill-seal packages of the "pillow" type comprises a paper web which is coated with a normally non-tacky pressure- or heat-activatable adhesive and which is treated with a composition having release properties with respect to the adhesive, e.g. by means of a size press. The release composition is preferably a polysiloxane, an organo-chromium stearate complex, a ketene dimer or a paper fluoridizing agent.

Abstract: A packaging material for food to be subjected to high-temperature short-time sterilization, which comprises a flexible laminate sheet including (a) a heat-sealable inner face layer of a crystalline polypropylene, (b) an outer face layer of a thermoplastic or thermosetting resin having a melting point or decomposition point higher than the melting point of said polypropylene and, if desired, (c) an oxygen-barrier layer interposed between said layers (a) and (b), said polypropylene layer being composed of a film of a polypropylene having a melt flow index of 0.5 to 3, said film being characterized in that (i) when the film is extracted in salad oil at 130.degree. C. for 30 minutes, the amount extracted of the polypropylene is smaller than 1500 ppm, (ii) the polypropylene film has a pseudohexagonal crystal form or a crystal form of a combination of the pseudohexagonal system and .alpha.-monoclinic system and a degree of orientation not higher than 3.

Abstract: An ice cream cone product is provided having a sanitary paper jacket adhered thereto which is sufficiently adherent for shipping, handling and vending but which is selectively removable without leaving jacket remnants on the cone or cone remnants on the jacket. A jacket is telescopically juxtaposed over the cone after the jacket interior is applied with vaporized mixture of water and an adhesion-reducing agent. A conveyor for the cones, a timed dispenser and injector for placing the jackets alternately on the same conveyor with the cones, a device to combine each jacket with a cone and an accumulator for the jacketed cone product comprises the apparatus to practice the method.

Abstract: A cellulose packaging film for packaging soft cheeses has a controlled permeability to oxygen, carbon dioxide, ammonia and water vapor which allows the cheese to properly ripen while wrapped in the packaging material. The cellulose packaging film is formed from a cellulose film substrate with a coating layer of a nitrocellulose varnish having distributed therein casein or starch particles which have a diameter which is greater than the thickness of the coating layer. In use, the soft cheese is wrapped with the cellulose packaging film with the nitrocellulose varnish layer facing the soft cheese.

Abstract: A closable container in which is enclosed brominated carbonaceous molecular sieve having micropores within the range of 4 to 6 Angstrom units in diameter and a method for prolonging the shelf-lives of green perishable foods and flowers by the use of said container.

Abstract: Saran blended with butyl rubber exhibits a good balance of melt extrudability and oxygen barrier properties.

Abstract: To extend their shelf life, certain vegetables are placed in enclosures that are at least as permeable to carbon dioxide, carbon monoxide and oxygen as low density polyethylene that is not more than two mils thick, the atmosphere within the packages is modified to comprise at least about 25% oxygen by volume, at least about 3% carbon monoxide by volume, and the balance substantially all molecular nitrogen, and the packages are then sealed. The permeability should be sufficient to prevent the carbon dioxide concentration from rising much above 20% by volume, and to prevent the oxygen concentration from falling much below about 2% by volume.

Abstract: A shaped article, especially a tubing, is disclosed which comprises a plasticized cellulose hydrate composition of high mechanical strength which is obtained by reacting a plasticized cellulose composition obtained by treating cellulose hydrate with a plasticity-enhancing amount of at least one plasticizing alkyl derivative which comprises an alkyl containing from about 8 to about 24 carbon atoms and which is selected from the group consisting of alkylamido-bis-dimethylene-triazinone-tetramethylol, alkylamino-bis-dimethylene-triazinone-tetramethylol, a substantially water insoluble ester of an aliphatic monocarboxylic acid containing from about 9 to about 25 carbon atoms, and a polyalcohol, such as glycerol or polyethylene glycol with a cyclic dimethylolurea derivative, and water and/or a plasticizer.

Abstract: Synthetic resin compositions based on vinyl polymers or copolymers are stabilized against degradation by both heat and light by the incorporation therein of a 1,4-dihydropyridine derivative represented by the general formula: ##STR1## wherein R represents a straight or branched-chain saturated or unsaturated alkyl radical containing from 9 to 22 carbon atoms. The stabilizer can be present in an amount of from 0.01 to 0.5 percent by weight, based on the vinyl resin. The vinyl resin may be, for example, polyvinyl chloride, a vinyl chloride-vinyl acetate copolymer or a vinyl chloride-vinylidene chloride copolymer. The stabilized vinyl resins can be used in the manufacture of food packaging materials and containers and also of flooring tiles and recording discs.Some of the dihydropyridine derivatives are novel compounds.

Abstract: A cellulosic food casing includes an internal coating comprising a water soluble cellulose ether and a cationic thermosetting resin.

Abstract: A processed meat packaging tube is a tube of an orientated laminated film having more than 5% of a shrinkage coefficient at 80.degree. C., less than .+-.5% of percent elongation-shrinkage at 80.degree. C. under tensile modulus of 20 Kg/cm.sup.2 and more than 8 Kg/cm.sup.2 of tightening modulus at 5.degree. C. and more than 1.0.times.10.sup.3 Kg/cm.sup.2 of a tensile modulus of elasticity at 80.degree. C. which is formed by stretching a composite film having an inner layer made of an oxygen barrier thermoplastic resin having less than 1.times.10.sup.-11 cc.multidot.cm/cm.sup.2 .multidot.sec.multidot.cmHg (measured by Seikaken method) of oxygen permeability coefficient and outer layers made of the other thermoplastic resin having smaller water absorption than that of the inner layer.

Abstract: A container structure for carbonated beverages is described formed of a multiple wall structure having an inner wall and an outer wall. The inner wall is formed of a material through which a gas such as carbon dioxide from the retained beverage can migrate and become trapped in a chamber between the inner and outer walls. The outer wall is formed of a material which is sufficiently impervious to carbon dioxide so that a gaseous thermally insulative chamber is maintained around the inner wall. The inner and outer walls may be formed of thin heat sealable sheet material to provide a flexible thermally insulated carbonated beverage container.

Abstract: To reduce the number of oversize sausage links created during linking of stuffed regenerated cellulosic casings, the casing, before stuffing, has applied to the external walls thereof an aqueous dispersion containing a material which imparts a low coefficient of friction to the casing.

Abstract: A freshly slaughtered and skinned meat carcass has its skinned surface covered with a shroud consisting of a rectangular cloth composed of a blend of cotton and polyester fibers and held in place by skewers to cause the shroud to fit tightly against the skinned surface. The shroud is saturated with an aqueous saline solution when applied, and the fully wetted shroud is allowed to lose its moisture in the chilling room as the carcass loses its body heat.

Abstract: A film useful as a packaging material having a self-adhering layer on the interior thereof has improved optical and adhesion characteristics. The self-adhering layer is composed of a terpolymer of ethylene, a vinyl ester and an alkenoic acid. The saran layer is plasticized with a polyester to synergistically improve both the optical and adhesive characteristics of the composite laminate.

Abstract: This invention relates to an artificial sausage casing of regenerated cellulose having a coating composition applied over the internal surface thereof which exhibits excellent meat release from sausages processed therein under high speed mechanical peeling and has improved resistance to strand breakage and pinholing during shirring and meat processing, the coating being an admixture of a water-soluble cellulose ether, a partial fatty acid ester of sorbitan or mannitan and a water-soluble polyalkylene glycol ether having the formula RO(--C.sub.2 H.sub.4 O).sub.n --H wherein R represents long chain alkyl radicals having 8 to 16 carbon atoms and n is an integer from 4 to 40.

Abstract: A process for packaging bulk commodities such as meat comprises vacuum sealing the commodity into a bag of plastics material and then causing the material of the bag to expand by a further reduction in pressure of the environment surrounding the bag. The material expands into contact with heaters which heat the material and when the environment surrounding the bag is returned to normal pressure, the material closely encloses the commodity.

Abstract: A multilayered hollow plastic container having improved resistance to permeation by unwanted gases, especially injection blow molded containers having a preformed inner lining which is applied to a core prior to the formation of the composite parison. One layer is a barrier plastic having substantial but incomplete resistance to gas permeation, and another layer contains a getter material capable of binding unwanted gas uniformly dispersed throughout.

Abstract: A method of making multilayered hollow plastic containers having improved resistance to permeation by unwanted gases, especially injection blow molded containers having a preformed inner lining which is applied to a core prior to the formation of the composite parison. One layer is a barrier plastic having substantial but incomplete resistance to gas permeation, and another layer contains a getter material capable of binding unwanted gas uniformly dispersed throughout. The resultant improved container is characterized by having improved resistance to gas permeation.

Abstract: A method wherein a machine-foldable wrapper for chewing gum has a paper substrate metallized to give the appearance of continuous foil, the foil being made discontinuous to allow the paper to reach and maintain a moisture content which is in equilibrium with the ambient air. This prevents the wrapper from curling at the edges while in storage.

Abstract: A controlled atmosphere package for retarding the ripening rate of tomatoes is formed from a gas permeable film which allows the tomatoes to convert the package atmosphere to an environment containing 0 to 10 vol.% carbon dioxide and 2.5 to 10 vol.% oxygen. The package contains chemical agents capable of absorbing moisture and carbon dioxide from the package environment so as to prevent mold growth or injury to the tomatoes.

Abstract: There are disclosed films for stretch wrapping which comprise an olefin polymer, preferably a specific ethylene-vinyl acetate copolymer (referred to as "EVA copolymer" hereinafter) and specific polyalkylene ether polyols and non-ionic surfactants of fatty acid and polyhydric alcohol ester derivatives and which have suitable orientation expressed by heat shrinkage and excellent elastic recovery, by which excellent mechanical strength, wrapping finish, optical characteristics and preservability of the goods, especially fresh foods are attained. Method for producing said films is also disclosed. These films are suitable also for wrapping by automatic wrapping machines.

Abstract: An oriented two-layered laminate of vinylidene chloride-vinyl chloride copolymer as one layer and an ethylene-unsaturated ester type copolymer as the other layer. To this laminate may be adhered another polymer, also capable of being oriented, plastic sheet, paper sheet or board, metal or metal foil. Products such as pouches, chubs, formed troughs and the like can be made therefrom because the vinylidene chloride-vinyl chloride copolymer retains its orientation.

Abstract: A materials composite having improved resistance to permeation by unwanted substances, especially gas permeation. The composite includes a first layer of a barrier having partial resistance to permeation and a second layer adhered to the first layer. The composite includes a uniformly dispersed getter material capable of absorbing unwanted substance permeating through the barrier.

Abstract: A structural multiple ply wall for a product container has an inner container sheet ply having a composition providing low product permeability through the ply for a product disposed adjacent to a first face of the ply. A fluid coating consisting of an aqueous solution of a reducing sulfite salt is disposed adjacent to the second face of the inner sheet ply, the coating actively reacting with oxygen gas from the adjacent atmosphere. At least one sheet exterior ply has one face of one of the exterior ply disposed adjacent to the fluid coating. The exterior ply can have a composition providing low oxygen permeability through the sheet exterior ply. The inner sheet ply, the liquid coating, and the sheet exterior ply are contiguously integrally disposed together forming the structural multiple ply wall. The wall is formed into a product container providing at least the major proportion of the container wall area. A method of manufacturing the multiple ply wall is taught.

Abstract: A method of improving the shelf life of cut leafy vegetables wherein the cut vegetables are treated with an aqueous chlorine bath, dried to remove adhered water from said bath and enclosed in a sealed, evacuated package of a flexible sheet material having specified gas and moisture permeabilities; and the resultant produce, are disclosed herein.

Abstract: In accordance with the present invention, films of a nylon 6-nylon 6,6 blend are produced by a process which comprises blending about 50 to about 80 percent by weight nylon 6 resin and correspondingly about 50 to about 20 percent by weight nylon 6,6 resin, extruding said blend at a temperature above its melting point onto a smooth moving support to form a coherent film; maintaining said support at a surface temperature in the range of about 230.degree. to about 300.degree. F. and collecting the resultant film. The resultant film has a haze value, as hereinafter defined, in the range of about 5 to about 20 percent, preferably about 8 to about 14 percent. Film having the latter range of haze values is particularly suitable for the production of cooking bags.

Abstract: An adsorbent package comprising spunbonded olefin wall means, and adsorbent means confined by said wall means, said wall means being fabricated from planar sheet material formed into tubular shape and having a heat and pressure sealed seam which causes the spunbonded olefin material to become transparent in the area of the seam to permit viewing of the adsorbent therethrough.

Abstract: Treating lettuce for use in salads and the like to extend the storage life f said lettuce to at least about 4 weeks under refrigeration. The lettuce leaves are subdivided by cutting and treated with an aqueous solution of sodium meta bisulfite, citric acid, ascorbic acid, and potassium sorbate. Excess solution is removed from the cut lettuce, which then is enclosed in plastic bags made of vinylidine chloride-vinyl acetate copolymer film having low rates of transmission of oxygen, carbon dioxide, and water vapor. The plastic bags of treated cut lettuce are tightly closed to prevent intermixing of outside air with the interior atmosphere of the bags and the treated cut lettuce, and they are stored at about 1.7.degree. .+-. 1.0.

Abstract: Dry beverage mixes that are stable, free flowing and economical are produced by incorporating as a minor constituent thereof up to the level of 50% of the saccharides present, a dessicated dextrose having a moisture content, as packaged, less than 1% and greater than 0.03% under controlled relative humidity packaging.

Abstract: This invention relates to polymerized polymeric vinyl films containing a minor portion of an anti-fogging and anti-tackifying agent, said agent comprising a partial ester of a water soluble C.sub.2-6 polyol with a C.sub.12-18 aliphatic monocarboxylic acid, a polyalkoxylated derivative of a partial ester of a water soluble C.sub.2-6 polyol with a C.sub.12-18 aliphatic monocarboxylic acid, the alkoxy groups therein having each 2-3 carbon atoms and the number of alkoxy groups being about 3-30 per molecule of said alkoxylated partial ester and in combination with both or each of the aforementioned partial esters, polyalkoxylated alkyl phenol, the alkoxy groups therein having each 2-4 carbon atoms and the number of alkoxy groups being about 3-50 per molecule.

Abstract: A specific paper, which is soluble in and easily destroyable with water, is obtained by subjecting to papermaking a suspension of fibers of pullulan, which is a linear high polymer having repetition units, bonded through .alpha.-1,6-linkages, of maltotriose, a trimer of glucose, and has a structure represented by the formula, ##SPC1##Wherein n is an integer of 20 to 10,000 which represents the polymerization degree, or, if necessary, a suspension of said pullulan fibers in admixture with vegetable fibers such as wood fibers, flax or ramie fibers.