Abstract: A patch bag has a patch adhered to a bag, with a primary seal primary seal across an uncovered portion of the bag, and a supplemental seal inward of the primary seal. The supplemental seal reduces or eliminates an uncovered region between the primary seal and the patch, and prevents a product in the bag from contacting the primary seal. The patch bag is especially useful in the packaging of a bone-in meat product, especially ham, sparerib, picnic, back rib, short loin, short rib, whole turkey, pork loin.

Abstract: Disclosed is an oriented, heat shrinkable, thermoplastic vacuum bag having a protective heat shrinkable reverse printed patch attached thereto, thereby protecting the bag from puncture by sharp protruding bones in bone-in cuts of meat which are vacuum packaged within the bags while simultaneously providing desired graphics protected from abrasion. The protection is especially directed to prevention destruction of the desired graphics when used on bags for packaging bone-in cuts of both fresh and smoked or processed meat. The reverse trap printed bag produced by this method is also disclosed.

Abstract: A multilayer film having a first layer including a blend of a crystalline nylon and a material which disrupts the crystallinity of the crystalline nylon; a second layer also including this blend; and a third intervening layer, between the first and second layers, including a material having a modulus lower than the modulus of the crystalline nylon, and having a crystallinity of less than 60%. The nylon blend layers, which can be two or more in the film, add toughness and stiffness, but also elastic recovery to the final film. The intervening layer or layers of a material with relatively low modulus and crystallinity aid in orientation of the film during manufacture, permitting the use of more of the crystalline nylon than would be practical if only a single nylon layer was used.

Abstract: The invention provides a film, a package and methods for employing the same. The film has a first layer of an elastomer and a second layer of a polyethylene such as a single site catalyst polyethylene. The film can have a third layer of a polyethylene such that the second layer is disposed between the first and third layers. The polyethylene of the third layer also can be single site catalyst polyethylene and, the elastomer of the first layer can be styrene butadiene copolymer. The film has an oxygen transmission rate of up to about 1000, such as 150-450 cc/100 in.sup.2 /24 hr., typically 260-400 cc/100 in.sup.2 /24 hr., with values of 300, 350-360, 400 cc/100 in.sup.2 /24 hr. and even higher exhibited by the film. The film is suitable for packages, for instance, packaging for cole slaw and leafy salad. The film also exhibits excellent clarity, durability, seal strength and machinability.

Abstract: A method of packaging meat emulsion in a flexible thermoplastic bag, wherein the bag has dispersed on its insides, prior to insertion of the meat emulsion into the bag, additives such as liquid colorant or liquid smoke, via a squeeze roller and backing plate (or two squeeze rollers), is shown. An apparatus for dispersing the additives via a squeeze roller and backing plate (or two squeeze rollers) is also shown.

Abstract: A polymeric film structure having improved oxygen, flavor/odor, grease/oil and moisture barrier characteristics is disclosed. The structure includes a polymeric core sandwiched between an oxygen barrier on one side thereof and a moisture barrier on the other side of the polymeric core. The oxygen barrier includes polyvinyl alcohol cross-linked with aldehyde containing cross-linking agents in the presence of a catalytic amount of an inorganic acid, preferably sulfuric acid. The moisture barrier is a coating of polyvinylidene chloride, which also enhances the oxygen barrier of the polymeric film structure.

Abstract: An environmentally friendly polymer film pouch made from a homogeneously branched substantially linear ethylene interpolymer film structure for the packaging of flowable materials such as milk, the pouch includes, for example, a multilayer film structure such as a two-layer or a three-layer coextruded film containing at least one seal layer of a homogeneously branched substantially linear polyethylene. A process for making a pouch for packaging flowable materials using a homogeneously branched substantially linear ethylene interpolymer film structure is also disclosed.

Abstract: A barrier film composition can comprise a thermoplastic web comprising a thermoplastic polymer and a dispersed cyclodextrin composition having substituents that compatibilize the cyclodextrin in the film. The thermoplastic/cyclodextrin film obtains substantial barrier properties from the interaction between the substituted cyclodextrin in the film material with a permeant. The substituents on the cyclodextrin molecule causes the cyclodextrin to be dispersible and stable in the film material resulting in an extrudable thermoplastic. Such materials can be used as a single layer film material, a multilayer film material which can be coated or uncoated and can be used in structural materials wherein the thermoplastic is of substantial thickness resulting in structural stiffness.

Abstract: An effective oxygen barrier which can substantially extend the shelf life of oxygen sensitive products comprising at least outer and inner plies of a polymeric material and a substantially anaerobic space between the two or more plies.

Abstract: The present invention relates to the composition, preparation, and use of multi-layer composite films comprising a core layer of low gas permeable material, two intermediate layers sandwiching the core layer, and two outer layers sandwiching the two intermediate layers. The core layer provides the excellent oxygen barrier property, whereas the intermediate and outer layers protect the core layer so the oxygen permeability of the resulting multi-layer composite film becomes independent on relative humidity.

Abstract: Hot water and superheated steam resistant barrier films, well adopted as packaging materials, e.g., for perishable comestibles, notably foodstuffs, at least in part include at least one layer of a polymer alloy comprising (a) at least one ethylene-vinyl alcohol (EVOH) copolymer, (b) at least one polypropylene and (c) a compatibilizing amount of at least one compatibilizing agent therefor.

Abstract: A generally flat tray is adapted for supporting a pizza or other food item on an upper surface thereof. The tray is preferably comprised of corrugated paperboard with its upper surface having a parchment-like coating and including a plurality of linear, elongated slots arranged in a spaced manner to permit juices and liquids exuded by the pizza to flow into and be trapped within the inner corrugated portion of the tray for maintaining the pizza crust dry and crisp. Facing edges of each slot are beveled downwardly to facilitate flow of the juices and liquids into the tray's inner portion where the juices and liquids are entrapped. The parchment-like coating on the tray's upper surface draws the juices and liquids from the pizza crust and redirects heat emanating from the pizza upward back into the pizza to maintain the pizza at an elevated temperature. The tray may be used for storing and serving pizza and may be integrated in the bottom of a closed container for transport and extended storage of the pizza.

Abstract: A composite integral sheet of wrap material which includes a first layer of absorbent material containing fibers bearing foraminous hydrophobic water-vapor-permeable pellicles, a second layer of printable material and an impermeable pigmented polymer layer interposed between the first and second layers. Additionally, the absorbent layer will include highly absorbent material formed by in-situ crosslinking of a partially pre-neutralized polyacrylic acid. 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: The biaxially stretch-oriented multi-layer tubular packaging casing for packaging pasty products, in particular the artificial sausage casing, includes a barrier layer having a reduced permeability to oxygen, an outer layer and an inner layer. The barrier layer comprises a partially aromatic polyamide and/or copolyamide, the outer and inner layers an aliphatic polyamide or copolyamide or a polymer mixture of at least one of the two compounds.

Abstract: An improve heat-sealable cook-in package for meat products capable of providing excellent adherence with minimal purge loss comprised of interfacing sealable wall portions the interfacing layers of which consist of a high strength, high shrink, low melt index ethylene acid copolymer for adhering contact with the product and itself.

Abstract: This invention relates to an improved biaxially oriented heat shrinkable multilayer film, a hermetically sealed and evacuated trayed food package wherein the film is used as a stretched heat shrunk overwrap and a method for sealing and wrapping such packages.

Abstract: A reclosable, hermetically-sealed flexible package which has an inner, hermetic peelable seal and a reclosure seal, typically including interlocking closure strips, is provided with one or more of various tamper-evident features which provide an easily visible and noticeable indication of disruption thereof of the type that would gain access to the reclosure seal.

Abstract: A blank for a paperboard container is provided on one of its surfaces with a layer of food-contacting polymethylpentene. The container formed from the blank, as by bending the blank along fold lines, requires one or more overlapped joints such as the usual manufacturer's joint. To overcome the non-stick properties of the polymethylpentene layer, the layer is flame treated so that it will adhere to a conventional water based, FDA approved adhesive and thereby make possible the formation of a seam or other overlapped joint or joints. Flame treatment is restricted to portions of the area of the polymethylpentene layer that are involved in the formation of the overlapped joint or joints. Alternatives to flame treatment include corona treatment, solvent treatment or treatment of the polymethylpentene surface with a solvent based primer.

Abstract: Heat-shrinkable films suitable for packaging food articles such as frozen poultry, primal meat cuts, and processed meat products. In one embodiment, the film may be a biaxially stretched monolayer film of a very low density polyethylene copolymer. In another embodiment, the film may be a biaxially stretched multilayer film comprising a first outer layer of an ethylene-vinyl acetate copolymer, a core layer of a barrier film such as a polyvinylidene chloride copolymer or an ethylene-vinyl alcohol copolymer, and a second outer layer comprising a blend of an ethylene-vinyl acetate copolymer and a very low density polyethylene copolymer. The multilayer film is preferably made by coextrusion of the layers. The films are fabricated into bags useful for the aforementioned purposes. The bags have improved toughness.

Abstract: Food products, especially fresh food products such as retail-cut red meat, vegetables and fruits, are packaged with a film having at least one film layer comprising a substantially linear ethylene polymer, preferably a polymer comprising ethylene and at least one .alpha.-olefin comonomer, e.g. 1-octene. The ethylene polymers used in the construction of the film structures used in this invention are prepared by constrained geometry catalyst technology. The film structures can be either mono- or multilayered, oriented or nonoriented, oxygen permeable or impermeable, and prepared by any conventional technique. The food products can be packaged by any conventional method, e.g. stretch overwrap, shrink, vacuum skin, on vacuum forming.

Abstract: A wrapping material comprising a sheet of material such as paper, cellophane, foil, or man-made organic polymer film and a cling material such as polyethylene secured to a portion of the sheet of material. The cling material connects to the sheet of material and/or itself as the wrapping material is wrapped about an item thereby securing the sheet of material about the item. A method of wrapping an item such as a floral arrangement, Easter basket or a gift container by wrapping the item with the wrapping material.

Abstract: A perforated package of a composite integral sheet 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 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. The package has two parallel lines of perforation which allow access to the interior of the package and to the foodstuff contained therein. A method of using the perforated package of composite integral material.

Abstract: A multi-layer film useful in food packaging comprising a first core layer comprising VLDPE or LLDPE; optionally a second core layer comprising VLDPE or LLDPE; two outer layers each comprising an ionomer; and further core layers between the first core layer and the outer layer and between the second core layer and the outer layer the further core layers comprising an olefin polymer or copolymer. The film may also include an oxygen barrier layer and may be oriented to provide a heat shrinkable film.

Abstract: A method for producing an extruded film article such as a bag, which is a blend of a thermoplastic polymer such as ethylene vinyl acetate and an olefinic oxide polymer such as poly(ethylene oxide), with a modifier such as liquid smoke absorbed in the blend. The modifier is transferable from the film to a receiving surface such as a food body in fluid transfer relationship with the film.

Abstract: The present invention relates to a food packaging bag comprising a water-resistant perforated sheet part which composes of at least a part of an outer layer of the bag, a moisture permeable waterproof film which is laminated by bonding in part to an inside of the perforated sheet part as an inner layer to form a moisture permeable waterproof part, and a waterproof sheet part which composes of the rest of the outer layer part. Further, when, if desired, an absorbent sheet layer is provided on at least a part of the inside of the waterproof sheet part, the functions of the moisture permeable waterproof film such as moisture permeability are scarcely impaired when the packed food is heat-cooked, and the moisture permeable waterproof film weak in strength is seldom broken by scraping distribution or bursting during cooking with heat.

Abstract: An environmentally friendly polymer film pouch made from a homogeneously branched substantially linear ethylene interpolymer film structure for the packaging of flowable materials such as milk, is disclosed. A pouch made from a multilayer film structure such as a two-layer or a three-layer coextruded film containing at least one seal layer of a homogeneously branched substantially linear polyethylene is also disclosed.A process for making a pouch for packaging flowable materials using a homogeneously branched substantially linear ethylene interpolymer film structure is also disclosed.

Abstract: This invention relates to a coextruded, biaxially stretched tubular film for durable and crease-free wrapping of goods packaged in a liquid or pasty state, in particular foodstuffs such as sausage meat for boiling or cooking and cream cheese, which are heated treated during and/or after the packaging process.

Abstract: Dual state packaging may be implemented with a tray having a peripheral flange adapted to receive a pair of membranes to enclose the tray. The lower membrane is the more permeable of the two. It may be attached to a first surface of the flange. The second membrane is attached to a second outer surface of the flange without direct connection except through the tray to the more permeable membrane. The two connection surfaces may be separated by a depression to facilitate the cutting away of the material forming the more permeable membrane in a continuous manufacturing process. With the less permeable membrane in place, a desired gaseous environment may be maintained within the package. When it is desired to change the gaseous environment, the upper less permeable membrane may be peeled away allowing gaseous communication through the lower more permeable membrane.

Abstract: A vacuum skin package for packaging fresh red meat and like articles is produced by using a composite, multilayer, oxygen barrier, vacuum skin packaging forming film in which the impermeable film can be manually separated from the non-barrier, oxygen permeable film. 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 impermeable film can be removed so that the remaining permeable film can admit oxygen to impart the desirable red bloom to the fresh meat. The oxygen permeable film preferably includes a core having enhanced permeation properties. The impermeable film preferably includes an EVOH layer sandwiched between ionomer layers for improved barrier properties.

Abstract: A multilayer film suitable for packaging produce comprises a core layer comprising a blend of ethylene butyl acrylate copolymer and very low density polyethylene; and two outer layers comprising a blend of ethylene alpha olefin copolymer having a density of at least about 0.916 grams per cubic centimeter, and ethylene vinyl acetate copolymer.

Abstract: Packaging material with good gas barrier properties comprising a first and a second layer of a fibrous material, e.g. paper or cardboard, and a layer of a water based polymer, e.g. polyvinyl alcohol, placed between and in direct contact with the layers of fibrous material and functioning both as a gas barrier and as a binding agent in the packaging material.The packaging material is produced through bringing together and binding together with each other a first and a second strip or sheet of a fibrous material by means of a layer of a water based polymer, e.g polyvinyl alcohol, applied between and in direct contact with the strips or sheets. The surplus water in the thus applied polymer layer is absorbed by the fibrous material in one and/or the other strip or sheet to form the intermediate layer functioning as gas barrier and binding agent.

Abstract: A meat product package including an enclosing film having an EVA-containing inside surface and an in situ aqueous medium-cooked meat product in adhering relation to the film inside surface as the meat contacting and adhering surface. Starch particles are preferably dispersed across the meat contacting surface which has been both irradiated and subjected to corona treatment. A method for corona treating a thermoplastic tube inside surface in which small particles within the flat tube separate opposite surfaces providing voids, and the electric discharge crosses the flat tube through the voids.

Abstract: A coextruded film having an oxygen transmission rate between about 160 and 375, making it especially suitable for packaging fresh produce, comprises a skin layer of polypropylene, a core layer of ethylene-vinyl acetate copolymer, and a heat seal layer of ultra linear low density polyethylene.

Abstract: A multi-layer, coextruded blow-molded plastic bottle consists of a layer of EVOH sufficiently thick to inhibit moisture from inside the bottle from penetrating from the interior surface of the EVOH layer to the exterior portion of the EVOH layer, and a second layer positioned exterior to the EVOH layer, wherein the second layer prevents moisture outside the bottle from reaching the EVOH layer, whereby the interior surface of the EVOH layer functions as an oil barrier and the exterior portion of the EVOH layer function as a oxygen barrier.

Abstract: The invention provides a thermoformable sheet comprising a resinous polymer of propylene and an effective amount of a beta-spherulite nucleating agent, a process for making the sheet and articles thermoformed from the sheet.

Abstract: An article for shrink packaging bone-in food masses such as meat cuts comprising a thin-walled heat shrinkable thermoplastic film bag and a thick-walled nonheat shrinkable thermoplastic film patch having its inner surface bonded to the bag outer surface. Both surfaces have high energy as the sole bonding means and the patch-bag bond strength increases during heat shrinking around the meat mass such that the bag portion adhered to the patch shrinks less than the rest of the bag.

Abstract: Multiple layer cook-in films are disclosed from which packages such as bags or casings can be made. The films have a first food contact layer with a core layer adhered thereto which includes a blend of a polymeric material having a high molecular weight and a fractional melt index and an ethylene alpha-olefin copolymer. The film further includes an abuse layer which has, at least, a polymeric material having a high molecular weight and a fractional melt index. Improved hold cold seal strength fresh and over time, improved orientation processing and lower shrink temperatures are obtained with the present core layer. The abuse layer and core layer adds to the processability of the material and improves optics.

Abstract: A multilayer laminate comprises a first perforated film of propylene homopolymer or copolymer, oriented heat set polyester or oriented heat set polyamide and a second film bonded to the first film and including a bonding layer of ethylene vinyl acetate copolymer or chemically modified ethylene unsaturated ester copolymer, a core layer of a heat resistant, breathable polymeric material, and an outer heat sealable layer. One or more filler layers may be included in the structure, located between the outer heat sealable layer and a polymeric adhesive layer.

Abstract: An environmentally friendly polymer film pouch made from a polyethylene film structure for the packaging of flowable materials, for example milk, including, for example, a pouch made from a multilayer film structure such as a two-layer or a three-layer coextruded film containing at least one layer of ultra low density linear polyethylene, as a seal layer.

Abstract: An extruded film article such as a bag comprises a blend of a thermoplastic polymer such as ethylene vinyl acetate and an olefinic oxide polymer such as poly (ethylene oxide), with a modifier such as liquid smoke absorbed in the blend. The modifier is transferable from the film to a receiving surface such as a food body in fluid transfer relationship with the film.

Abstract: A biaxially oriented heat shrinkable multilayer stretch film useful as a trayed poultry overwrap includes outer layers each comprising a blend of VLDPE (density below about 0.914 g/cm.sup.3 and an ethylene alpha-olefin plastomer (density below about 0.90 g/cm.sup.3).

Abstract: A multilayer packaging structure for microwave food reheating applications or for sterilized hot filling is provided having an outer layer prepared from a blend of polyphenylene ether and a high impact polystyrene. The polyphenylene ether-high impact polystyrene layer is useful as a structural support layer and provides resistance to distortion and burn through during microwave reconstitution or hot filling. The PPE/HIPS blend layer serves to increase the high temperature performance of the coextruded structure without sacrificing the thermoformability characteristics generally associated with HIPS based monolayer or multilayer structures. The ethylene vinyl alcohol or polyvinylidene chloride layers act as the oxygen barrier to prevent food spoilage and the polyolefin layer acts as a moisture barrier.

Abstract: Heat-shrinkable films suitable for packaging food articles such as frozen poultry, primal meat cuts, and processed meat products. In one embodiment, the film may be a biaxially stretched monolayer film of a very low density polyethylene copolymer. In another embodiment, the film may be a biaxially stretched multilayer film comprising a first outer layer of an ethylene-vinyl acetate copolymer, a core layer of a barrier film such as a polyvinylidene chloride copolymer or an ethylene-vinyl alcohol copolymer, and a second outer layer comprising a blend of an ethylene-vinyl acetate copolymer and a very low density polyethylene copolymer. The multilayer film is preferably made by coextrusion of the layers. The films are fabricated into bags useful for the aforementioned purposes. The bags have improved toughness.

Abstract: A packaging material useful for the controlled atmosphere packaging in bulk of fresh produce, comprising a liner material and a supporting cardboard substrate, wherein the liner material comprises an open cell foamed adhesive portion and a substantially solid thermoplastic film portion in face-to-face relationship.

Abstract: A method for packaging meat in a gas impermeable film which comprises providing a liquid absorbing insert formed by a water absorbing material between a sheet of a liquid impermeable material and a layer of liquid permeable material, placing the meat so as to face the liquid impermeable sheet, wrapping a gas impermeable sheet about the meat and liquid absorbing insert, and then providing a vacuum so as to form a capillary action at spaces between the meat and the liquid permeable sheet.

Abstract: An adhesive resin composition comprising an ethylene/vinyl acetate copolymer, a styrene polymer resin, graft-modified polyethylene, a polystyrene elastomer and an ethylene/.alpha.-olefin copolymer in combination is disclosed. This adhesive resin composition shows an excellent adhesiveness between a metal and a thermoplastic resin. When this adhesive resin composition is used for bonding a polyester resin and a gas-barrier resin, a good bonding which is not degraded even by high-temperature heating can be attained.

Abstract: There is disclosed a body for a retortable plastic container having a sidewall and bottom wall integrally formed as a single piece. The bottom wall has a heel portion and a recessed center portion. The heel has a resting surface and an inside corner. The recessed center portion has an outside corner. The container has an outside surface. The container is made in accordance with equations relating to reforming pressure and low fill equilibrium pressure and may be fabricated utilizing a variety of manufacturing modes since the providing of acceptable container configurations is not based on relative wall thicknesses.

Abstract: A heat-shrinkable, oriented film having two layers of different very low density polyethylenes is disclosed. The melt index of the polyethylenes differs by about 1 or more decigrams/minute. The films have good shrink and good puncture resistance.

Abstract: A resin composition containing a light-shielding material and vitamin E and packaging materials formed thereof. The light-shielding ability is increased by blending vitamin E. Laminated films where at least one thermoplastic resin film is interposed between two high Young's modulus films. The laminated films are excellent in tear strength, tensile strength, heat seal strength and bursting strength, and always secure light-shielding, moistureproofness and gas barrier. They can be used as a single-sheet bag for packaging a heavy product having shap edges.

Abstract: A thermoplastic, multi-layer packaging film is disclosed which comprises at least 5 layers in which one surface layer is a heat sealing layer and one of the internal layers is a barrier layer. The heat sealing surface layer comprises a copolymer of ethylene and an alpha-olefin having 4 to 8 carbon atoms per molecule and said copolymer comprises 90% to 75% ethylene and 10% to 25% alpha-olefin having 4 to 8 carbon molecules and a density of less than 915 kg/m.sup.2. The heat sealing layer may also comprise a blend of the aformentioned copolymer with an ethylene/vinyl-acetate copolymer or an ethylene/butyl-acrylate copolymer. The film can be oriented to be heat shrinkable and can be formed into bags by heat sealing portions of the sealing surfaces together. The heat seals have superior cold strength and minimize seal failure when the bags are loaded with relatively heavy products.