Abstract: The plastic bag with a hem and draw tape may include flexible thermoplastic sidewalls that have a network pattern imparted onto them across the side seams. In one embodiment, the network pattern is below the hem seal. In another embodiment, the network pattern covers the hem seal. The bag may also include a ribbed pattern below the network pattern. The network pattern may be continuous or discontinuous.

Abstract: A laminated tape includes: an adhesive material layer; a first polyolefin layer provided on one side of the adhesive material layer; and a second polyolefin layer provided on the other side of the adhesive material layer. The laminated tape is sandwiched between opposing base films of a packaging body to be welded. The polyolefin used for the first polyolefin layer and the second polyolefin layer is of the same type. The thickness of the respective layers of the laminated tape is preferably defined so that the thickness of the first polyolefin layer and the adhesive material layer is 30 ?m or more and the thickness of the second polyolefin layer is less than 30 ?m.

Abstract: A package particularly for horticultural products and food products in general, which can be manufactured with automatic packaging machines, comprising a sheet-like element in reel form, which is constituted by a biaxially-stretched polyethylene net which has a first plurality of filaments arranged substantially parallel to the longitudinal unreeling direction of the reel and a second plurality of filaments which are substantially perpendicular to the first plurality of filaments, the sheet-like element being folded and welded to itself at least at portions of the edges of the manufactured package.

Abstract: Sealing device for flexible liquid container is disclosed. In one preferred embodiment of the invention, the sealing device comprises an elongated member with a hollow passage extending through it with a longitudinal slot, slidingly mountable over a rod, which is provided over a lateral opening of a flexible liquid container. In another preferred embodiment of the present invention the rod is attached to the member extending through the passage. When the portion of the container provided with the lateral opening is folded over the rod, substantially overlapping an adjacent portion of the container and the sealer is slidingly mounted over the folded portion of the container, liquid is prevented from leaking out of the container through the lateral opening.

Abstract: A patch bag has a heat-shrinkable patch adhered to a heat-shrinkable bag. The patch comprises an ethylene/alpha-olefin copolymer having a density greater than about 0.915 g/cm3, this copolymer being present in the patch in an amount of at least about 5 percent, based on a total patch weight. The patch also comprises a heterogeneous ethylene/alpha-olefin copolymer having a density of less than about 0.915 g/cm3, which is also present in the patch in an amount of at least about 5 percent, based on total patch weight. In addition, the two ethylene/alpha-olefin copolymers make up at least 70 percent of the total patch weight. VLDPE is a preferred heterogeneous ethylene/alpha-olefin less than 0.915 g/cc, and LLDPE is a preferred ethylene/alpha-olefin greater than 0.915 g/cc. The patch film can be selected to exhibit a total free shrink and/or bone-puncture resistance which is higher than either VLDPE or LLDPE alone. The patch film can be selected to exhibit Standard Rib Drop Test results (i.e.

Abstract: Packaging containers produced from a composite shaped by cold-forming, the term “packaging containers” including base or lid parts or base or lid parts shaped by cold-forming. The base or lid parts can be shaped by cold-forming, and a lid foil or base foil, respectively, can form the corresponding closure for the packaging container. In addition, both the base and the lid part can be shaped by cold-forming, the depressions formed in the base and lid parts advantageously lying opposite one another. Examples of these packaging containers are strip packing or blister packaging for pharmaceutical products.

Abstract: A bag made of flexible sheet material having an opening defined by a periphery. Juxtaposed with the periphery is a closure zone. The closure zone has induced extensibility in a direction perpendicular to the opening of the bag so that handle ties may be conveniently formed upon extension of the closure zone material. The handle ties are bound together to form an integral closure for the bag. The closure remains bound in response to forces upon it. The induced extensibility is provided by a network of dual regions having different modes of extensibility. The dual region network also provides the advantage of an increased gripping surface for forming the handle ties.

Abstract: A heat shrinkable gift bag is configured for at-home shrink wrapping of gift boxes using a home hair dryer. The gift bag consists of a monolithic sheet of heat shrinkable plastic film formed into an envelope style bag. The plastic film is a PVC-based film having a heat activation range in the heat range of a hair dryer. The film has a gauge thickness of about 80-100 gauge, and further has a 30—30 balanced shrink ratio to provide uniform shrinkage upon the application of heat. The plastic film is converted into a side-weld type bag having a rear bag panel and a front bag panel, the front bag panel being shorter than the rear bag panel to provide a lip. The front and rear bag panels are welded along opposing side edges thereof. In order to provide tight engagement of the box to be wrapped, the dimensions of the bag are preferably about 10-15% larger than the dimensions of the box. A self-adhesive strip is disposed on the lip of the bag to close the bag.

Abstract: The present invention is directed to oriented high molecular weight, high density polyethylene (HMW HDPE) films having enhanced water vapor transmission properties, as well as, superior toughness properties, and articles made therefrom. The present invention is also directed to a method of making machine direction oriented HMW HDPE films having enhanced water vapor transmission properties and superior toughness properties, and articles made therefrom. The present invention is further directed to articles, particularly bags, made from machine direction oriented HMW HDPE films having enhanced water vapor transmission properties and superior toughness properties.

Abstract: The invention concerns packaging container produced from a composite shaped by cold-forming, the term “packaging containers” including base of lid parts or base and lid parts shaped by cold-forming. The base or lid parts can be shaped by cold-forming, and a lid film or base film, respectively, can form the corresponding closure for the packaging container. In addition, both the base and the lid part can be shaped by cold-forming, the depressions formed in the base and lid parts advantageously lying opposite one another.

Abstract: The provision of an easily laterally opened type paper container includes: a paper base material which is made of material having thermoplastic resin layers on both sides thereof; an opening piece which is formed of a resin film, and sandwiched and bonded between an upper piece and a lower piece of an overlap width portion of the paper base material which is overlapped and laminated on each other with a picking length; a notch portion defined in the upper piece of said overlap width portion in correspondence with both ends of said opening piece laterally; and an oriented polyolefine film having such a characteristic that an orientation magnification of the film in one direction is larger than that in a direction orthogonal to the one direction, which is stacked on an inner surface of the paper container material in such a manner that the one direction having the larger orientation magnification coincides with an opening direction of the paper container.

Abstract: This invention relates to a sack made of fabric consisting of monoaxially drawn, desirably single-layer, tapes of polymer, particularly polyolefine, preferably polypropylene, which fabric may be coated on one or both sides with a thermoplastic material, particularly polyolefine, wherein the fabric is a seamless tubular fabric or a flat fabric combined to form a tube and at least one end of the sack having in particular the shape of a box or a right parallelepiped is formed by folding the fabric ends to a particularly rectangular bottom surface.

Abstract: A resealable bag is formed of flexible sheet material having, embedded therein, a number of parallel, spaced apart strips of inelastic but bendable material which are capable of assuming a set position when bent. The strips, which extend generally longitudinally along the full length of the bags, each include a substantially widened portion, near the mouth of the bag, which co-operates with the flexible package walls to form a closure for resealing the package. A series of filled bags may be formed by first forming a continuous length of a flexible two-ply sheet material having a number of strips disposed between the plies. The end of the sheet is drawn past a hollow mandrel so as to bring the sheet edges into overlapping relation. The overlapped edges are joined to form a tube, the end of which is sealed with a transverse seam to form an open-ended bag. The open bag is then filled through the mandrel, sealed with a transverse seam and severed from the length of material.

Abstract: A biaxially stretched, heat sealable, thermoplastic, flexible, food packaging film, preferably multilayer, having an outer heat sealable layer comprising an ethylene vinyl ester copolymer, preferably a blend of two different EVA copolymers wherein said heat sealing layer (which is preferably crosslinked by irradiation) has an M.sub.w of 50,000 or more, and an M.sub.n between 1000 and 18,000.

Abstract: A pouch adapted to accommodate medicine or the like comprising first and second compound films forming front and back surfaces of a pouch. Each of these compound films is composed of a resin film having a predetermined tear strength and a resin film having a good heat adhesive property and the first mentioned resin film is provided with a linear slit on one side thereof having un-cut portions. These compound films are overlapped with each other with the resin films having the heat adhesive property being disposed inside so as to oppose each other and with the slits formed to the resin films of the compound films forming the front and back surfaces of the pouch being coincident with each other in positions. The compound films are then heat fused. When a pouch is formed by these compound films, the pouch has an orientation capable of being torn in a direction corresponding to an extending direction of said slit.

Abstract: Heat-shrinkable coextrudate thermoplastic film packaging materials, well suited for the packaging of any one or more of a wide variety of articles, e.g., canned goods, and readily torn in a transverse direction substantially perpendicular to the machine direction thereof, e.g., by the provision of a tab or pull member thereon, are shaped from(a) at least one layer of a polyolefin; and(b) at least one layer of a copolymer selected from among ionic copolymers of:(1) .alpha.-olefins of the formula R--CH.dbd.CH.sub.2 wherein R is hydrogen or an alkyl radical having from 1 to 8 carbon atoms, with(2) .alpha., .beta.-ethylenically unsaturated carboxylic acids having from 3 to 8 carbon atoms, and(3) optionally, an additional monoethylenically unsaturated comonomer; with the proviso that from 10% to 90% of the carboxylic acid functions of such copolymer are ionized by neutralization by means of metallic ions distributed over the copolymer.

Abstract: The present invention relates generally to a thermoplastic packaging bag having a carrying handle and relates specifically to a packaging bag having a separate carrying handle. After the bag is loaded with product and closed, the closure securely attaches the handle to the bag.

Abstract: In a multilayer thermoplastic film having a vinylidene chloride copolymer barrier and at least a polyolefin second layer laminated to the barrier layer wherein at least the barrier layer is irradiated, hydrotalcite is blended with the polyolefin and substantially reduces odor generation due to ionizing irradiation of the barrier layer.

Abstract: Here is disclosed an overtape-sealed comprising a paper tube, having longitudinally opposite open ends one and/or both of which is covered and sealed with a twofold overtape wherein the overtape is bonded to the paper tube with adhesive having penetrated the outermost layer of the paper tube so that a release resistance established between the overtape and the outermost layer of the paper tube is higher than a release resistance of an inner layer not penetrated by said adhesive with respect to said outermost layer and thereby unsealing of the paper bag can occur along a boundary between the outermost layer and the inner layer or along the inner layer itself of the paper bag in proximity of said boundary.

Abstract: An improvement in a sealed pouch made of molecularly-orientable polymeric film that is sealed along peripheral edge margins is disclosed. The pouch defines a sealed cavity for containment of a fluid. The pouch also defines a sealed fluid-discharge spout that is in fluid communication with the fluid cavity. The pouch further defines a seam disposed between the fluid cavity and the spout. The improvement comprises at least three essential features. One such feature is that a portion of the polymeric film which defines a fluid-discharge end of the spout is molecularly-oriented in a preselected direction. Another such feature is that a portion of the seam defines a slit disposed transverse to the preselected direction. Still another feature is that a portion of the sealed pouch peripheral edge margin in the vicinity of the fluid-discharge end of the spout defines a tear-initiating notch oriented in the preselected direction.

Abstract: A method of making plastic bags in an in-line production stream having hand holes reinforced by double ply plastic material in which the molecular orientation of the plastic material extends across the bags and generally parallel to the upper ends of the bags. The method includes forming a longitudinal gusset along the upper ends of the bags in the machine direction of the plastic extrusion, slitting the inner fold line of the gusset, sealing the inner slit ends longitudinally to the adjacent front and back walls of the bags, forming transverse seals to close the side edges of the bags and separating the bags along the transverse seals.

Abstract: This invention relates to a method of improving the adhesion between a layer of vinylidene chloride copolymer and a layer of a linear ethylene/alpha-olefin copolymer and to the film produced thereby. More particularly, the invention relates to heat shrinkable films having a barrier layer of vinylidene chloride copolymer and a layer of linear low density polyethylene or very low density polyethylene and to a method for increasing the adhesion between the layers and thereby decreasing the incidence of delamination by blending the linear ethylene/alpha-olefin copolymer with an ethylene/butyl-acrylate copolymer.

Abstract: Adhesive tape for the recloseable closure of a tubular bag or the like, comprising a base, partly coated with an adhesive, having a lateral tab running in the longitudinal direction of the adhesive tape, characterized in that the base (2) continues, adjoining the tab (3), into a tear-open region (4), which, in the manner of an original closure, can be torn open in the longitudinal direction of the adhesive tape (1), and, adjoining thereto, continues into a further adhesive region (6) coated with adhesive (5b).

Abstract: A flexible bulk container comprises a tubular side wall structure (1 to 4) of woven fabric, lifting means (13) at an upper end of the side wall structure, and a base (14) closing the lower end of the side wall structure. The base is in the form of a polygon having an even number of sides and comprising a plurality of thicknesses of said woven fabric. Each thickness is formed by two joined flaps of woven fabric forming integral extensions of the side wall structure and each extending from one side of the polygon towards the opposed side thereof. In each thickness of the base, each flap is of substantially right-angled triangle shape having a first adjacent side lying along one side of the polygon and a second adjacent side extending at right angles from said one side to the opposed side of the polygon, and the two flaps are secured together substantially along the hypotenuses thereof.

Abstract: A packaging material for photosensitive materials comprising a laminate of at least three layers comprising thermoplastic resin bonded fabric of the mesh structure and flexible sheet layers laminated on both sides thereof, wherein:(a) said thermoplastic resin bonded fabric of the mesh structure has a mean thickness of 0.01 to 1.3 mm,(b) said thermoplastic resin bonded fabric of the mesh structure has an aperture ratio of 15% to 98%,(c) said laminate including one or two or more light-shielding layers, and(d) only one layer of said flexible sheet layers on both sides of said thermoplastic resin bonded fabric of the mesh structure is applied with an adhesive layer, and the other (opposite) flexible sheet layer is bonded and laminated over at least 10% of the overall area through the apertures or meshes in said fabric.

Abstract: A bag for mother's milk made of a laminated film or tube prepared through extrusion molding for containing mother's milk therein comprising a sealing portion provided on at least one side of the bag and extended across the extrusion direction and notches provided on the sealing portion for opening the sealing portion along the extrusion direction, while the bag is tightly sealed without any object therein, and a funnel-shaped reflux preventing member.

Abstract: Draw tape bags have a high molecular weight, high density polyethylene draw tape which is intermittently stretched so that the tape has central portions of relatively narrow and thin oriented polyethylene and end portions which are relatively wide and thick. The end portions are heat sealed to the sides of the bag panels to secure them. The stretching makes the tape cost more economical and improves the break characteristics while the thick and wide end portions permit good heat sealing without weakening the draw tape. Also disclosed is a method of making such bags.

Abstract: A bag for the preservation of mother's milk made of a laminated film or laminated tube obtained from an extrusion molding, wherein said bag comprises sealing portion(s) provided on the side(s) of the bag and extended in the transverse direction to the direction of said extrusion, and notches provided on the sealing portion(s) at the direction of said extrusion in order to open the bag along the direction of the extrusion, the bag being hermetically or tightly sealed while substantially containing nothing therein.

Abstract: A flexible and collapsible storage tank (10) for holding large volumes of material is fabricated in a rectangular shape from long lengths of a rubberized square-woven fabric. The lengths of fabric are oriented with overlapping adjacent edges to form inner (122) and outer (124) envelope structures which are integrally vulcanized into a homogeneous tank body (20). The inner envelope (122) is formed by longitudinally oriented fabric plies (22) having overlapping adjacent edges (22a) while the outer envelope (124) is formed by edge plies of fabric (26) folded about the peripheral edges of the inner envelope (122) and orthogonally oriented fabric plies (24) positioned on either side of the inner envelope (122). The tank (10) includes an air vent valve (40) mounted in its top and a closure (30) which clamps and seals a corner exposure (20a) of the tank body (20) and provides access and communication into the tank for filling and emptying.

Abstract: A heat-shrinkable film suitable for use in fabricating bags for packaging frozen poultry. The film composition comprises a resin mixture of between about 75 and about 95 weight percent of an ethylene-vinyl acetate copolymer having a vinyl acetate content of from at least about 1.7 to about 5.0 weight percent, and having a melt index of from at least about 0.15 to about 0.35 decigram per minute; and between about 5 and about 25 weight percent of a polyethylene material selected from the group consisting of: (a) high density polyethylene having a melt index of between about 0.15 and about 0.70 decigram per minute, and a density of between about 0.94 and about 0.96 grams per cubic centimeter, and (b) low pressure-low density polyethylene having a melt index of between about 0.3 and about 3.0 decigrams per minute, and a density of between about 0.915 and about 0.925 gram per cubic centimeter.

Abstract: A heat sealing layer is provided for multiply tubular film preferably of the type having an inner shrink layer of an irradiatively cross-linked ethylene vinyl acetate copolymer, a core barrier layer of vinylidene chloride-vinyl chloride copolymer, and an outer abuse layer of an ethylene vinyl acetate copolymer, the sealing layer being melt bonded onto the shrink layer and being composed of a propylene ethylene random copolymer. Heat seals formed in making bags from the improved film demonstrate enhanced high temperature strength and grease resistance. An associated method for making the tubular film is also provided.

Abstract: Linear low density polyethylene is used in multiple layer, molecularly oriented films. Novel blends of linear low density polyethylene with ethylene vinyl acetate copolymer are disclosed, and used in molecularly oriented multiple layer films. Bags made from the multiple layer films are especially useful for shrink packaging, and particularly for shrink packaging of meats having large cavities.

Abstract: A heat-shrinkable film suitable for use in fabricating bags for packaging frozen poultry. The film composition comprises a resin mixture of between about 80 and about 95 weight percent of an ethylene-vinyl acetate copolymer having a vinyl acetate content of from at least about 1.7 to about 4.5 weight percent, and having a melt index of from at least about 0.15 to about 0.35 decigram per minute; and between about 5 and about 20 weight percent of a polyethylene material selected from the group consisting of: (a) high density polyethylene having a melt index of between about 0.15 and about 0.70 decigram per minute, and a density of between about 0.94 and about 0.96 grams per cubic centimeter, and (b) low pressure low density polyethylene having a melt index of between about 0.3 and about 3.0 decigrams per minute, and a density of between about 0.915 and about 0.925 gram per cubic centimeter.

Abstract: Linear low density polyethylene is used in multiple layer, molecularly oriented films. Novel blends of linear low density polyethylene with ethylene vinyl acetate copolymer are disclosed, and used in molecularly oriented multiple layer films. Bags made from the multiple layer films are especially useful for shrink packaging, and particularly for shrink packaging of meats having large cavities.