Abstract: An improved coating is provided for fiberglass insulation articles which is coated onto the fiberglass insulation, thereby providing the fiberglass insulation with good mechanical properties and other desirable properties such as low emission of volatiles, fire retardency, low potential smoke generation and low air friction.

Abstract: Process for the production--using plasma spraying--of a coated product in which the coating consists of a ceramic fluorocarbon polymer-comprising coating, while between the surface of the product and the ceramic fluorocarbon polymer-comprising coating an adhesion layer completely of metal is applied. The adhesion layer consists in particular of at least two metals reacting exothermally with each other under plasma spraying conditions. In particular, the product to be coated is a thin-welled nickel, seamless cylinder with a wall thickness of 50-220 .mu.m. The invention also relates to an ink transfer roller in which a thin-walled seamless cylinder obtained by the process according to the invention is used.

Abstract: Tape for encasing electronic parts comprising a carrier tape having a plurality of recesses for encasing electronic parts and a plurality of guide perforations, and a cover tape pasted onto said carrier tape with an adhesive so as to seal only said recesses while leaving said guide perforations open.

Abstract: Provided are multilayered containers comprising a layer of a composition comprising a gas barrier resin, particularly ethylene-vinyl alcohol copolymer, incorporating an inorganic powder such as mica, and a layer of a composition comprising a thermoplastic resin incorporating an inorganic powder such as mica. The containers are excellent in gas barrier properties, particularly in gas barrier properties after being retorted, while showing very little deformation during retort treatment, and further excellent in mechanical strengths.

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: Skis of laminated construction are assembled by joining the several lamellae with a hot metal adhesive which preferably contains an effective amount of an adhesion promoting agent. The hot melt adhesive is preferably a linear polyester, polyesteretheramide, polyetherester, polyamide, polyetherurethane, copolymer of ethylene-vinylacetate, polyesteramide, or polytheramide, and when the adhesve is based on a copolymer, it is more preferable still that the copolymer is a block copolymer.

Abstract: Described are smooth, glossy finished fiber reinforced thermoplastic prepreg materials composed of reinforcement fibers impregnated with and surrounded by thermoplastic. Prior to consolidation, the material preferably consists of thermoplastic fibers and reinforcing fibers, intimately blended together. When heated, with the aid of pressure, the thermoplastic fibers melt, surround and impregnate the reinforcing fibers and provide a smooth, glossy finish to the reinforced article. Excellent surface appearance and the ability to accommodate high-speed processing characterize the prepreg materials of this invention.

Abstract: Fiber reinforced thermoplastic molded products, sheets, and the like, having a glossy surface are produced by intimately blending discrete reinforcing fibers (e.g. fiberglass) and thermoplastic fibers (e.g. polypropylene or polycarbonate) into a web. The web is heated to the melting point of the thermoplastic fibers while applying pressure, to eliminate air and press the web into a consolidated structure. Breakage of the reinforcing fibers is minimized by limiting the thickness of the web and limiting the pressure so as to produce a consolidated structure with minimal fiber breakage and a Notched Izod of at least one. Layering consolidated structures, some without reinforcing fibers, may be heated and pressed together to form a final structure having a thickness greater than the individual structures. The great majority of the fibers are provided so that the fibers of each type are within the range of about 0.5-5 inches.

Abstract: This invention relates to glass, glass-ceramic, and/or ceramic vessels which are coated with an organic polymer to reduce breakage and to protect the user from flying fragments when the vessels are broken upon impact. The invention contemplates strongly bonding the organic polymer in a small area around the mouth of the vessel only.

Abstract: A composite fiber and resin sign post for displaying highway signs which provides great reduction in vehicle damage in the event a vehicle moving at high speed collides with the sign post. This potential is achieved by the controlling the mode and location of the structural failure of the post upon impact. The failure mode of the post is controlled by varying the configuration of the post in cross-section, in combination with varying the specific fibers and resins, and in further combination with varying the location and placement of the fibers. The composite post may be constructed by pultrusion, filament winding, or related processes. A preferred embodiment uses a ground anchor socket constructed either by processes and components similar to those used in manufacturing the post, or by stamping sheet steel and spot welding to form a socket. The anchor socket provides additional control over the post failure and makes replacement of damaged posts quicker and easier.

Abstract: The invention relates to a gem compound comprising a plurality of gems bearing a melt adhesive layer, wherein the gems bear on their setting side a first melt adhesive layer, therebelow a filling layer which fills the spaces between the individual gems, and therebelow a second melt adhesive layer which is substantially flat and welded to the first melt adhesive layer in the area of the tips of the gems.

Abstract: The present invention is a polymeric composition with improved extrudability comprising a vinylidene chloride interpolymer and a Group IIA alkaline-earth hydroxyphosphate, which is incorporated with the vinylidene chloride interpolymer by advance addition, polymer slurry addition or, finally, by dry blending addition. The Group IIA alkaline-earth hydroxyphosphate will be present in an amount of between about 0.01 to about 5 weight percent, said weight percents being based on the total weight of the polymeric composition.

Abstract: A wave dampening batt for use inside a waterbed mattress is made by intimately mixing a multiplicity of short, non-woven fibers of a first type and a multiplicity of short, non-woven thermal bonding fibers. Raising the temperature of the mixture of fibers above the melting point of the thermal bonding fibers yet below the melting point of the fibers of the first type and then lowering the temperature below that melting point causes the thermal bonding fibers to join the fibers of the first type together throughout the wave dampening batt. A waterbed mattress having a batt made in accordance with this method is also disclosed. The fibers of the first type may be solid or hollow with closed ends, the hollow fibers with closed ends providing buoyancy for the batt. The fibers of the first type may also be lobed or unlobed, the lobed fibers having improved resiliency so that the batt recovers more of its thickiness after compression than a batt made of unlobed fibers of comparable size and denier.

Abstract: A dimensionally heat-recoverable article has on one of its surfaces a heat-curable adhesive coating. The coating has a mixture of substantially solid particles of a first reactive component with separate substantially solid particles of at least a second reactive component, the first and second components being capable of reacting together to effect curing of the coating when the heat-recoverable article is heated to its recovery temperature. The particles have a size distribution in which not more than 40% by weight of the particles are less than 50 micrometers in size and at least 90% by weight of the particles are less than 300 micrometers in size.

Abstract: A heat bond tape for carpet seaming and a method for making the tape. A yarn tape is fixed to a porous carrier strip during the tape knitting by stitching the yarn filaments to the carrier strip. The resulting tape carrier is adhered to a non-porous backing strip by a thermoplastic material, which adhesive material may be melted to join the edges of two pieces of carpet to the heat bond tape in the conventional manner.

Abstract: A method for treating capillary walls exposable to protein solutes is provided that reduces interactions of the protein solutes with the wall and that permits control of electroosmotic flow within the capillaries by selection of solution pH. Thus, a capillary tube has an interfacial layer covalently bonded to the inner wall of the tube. This interfacial layer is effective to reduce interactions between the inner wall and protein solutes and preferably includes a hydratable amphoteric phase. The amphoteric phase is a reaction product of a protein, peptide or an ampholyte and an oxygen or nitrogen nucleophile. Electroosmotic flow magnitude and/or flow direction may be controlled when capillaries of the invention are used for electrophoretic separations.

Abstract: A cover tape for sealing chips in chip-holding parts of a carrier tape having said parts provided discontinuously and longitudinally of said carrier tape, which cover tape comprises a base tape, an adhesive layer formed on one surface of said base tape and a non-adhesive coat formed on said adhesive layer along the longitudinal direction of said base tape so that said non-adhesive coat has a width broader than that of the chips and narrower than that of said adhesive layer. When the cover tape is used in combination with the carrier tape, the chip-holding parts are sealed by the cover tape having the non-adhesive coat and in consequence the chips held in the chip-holding parts do not come in contact with the adhesive layer although they might come in contact with the non-adhesive coat. Accordingly, the chips are not stained by the adhesive in the adhesive layer.

Abstract: A method for increasing heat dissipation from the smolder or open flame site of an upholstered article by interposing a fire barrier material between the outer upholstery fabric and the filler or padding materials. The fire barrier material is formed by coating a fibrous substance, such as glass fibers, carbon fibers, and the like with a latex containing a finely divided heat conductive metal.

Abstract: The present invention provides an improved composite which comprises one or more layers, at least one of said layers comprising network of high strength filaments having a tensile modulus of at least about 160 grams/denier, a tenacity of at least about 7 g/denier and an energy-to-break of at least about 8 joules/gram in a matrix material, the ratio of the thickness of said layer to the equivalent diameter of said filaments is equal to or less than about 12.8, and complex composite articles formed from said composite.

Abstract: A fiber/resin composite whose resin phase is formed by at least initial actinic radiation curing of a resin composition comprising an actinic radiation curable first resin component and a second resin component which is non-cured under curing conditions effective for the first resin component. The actinic radiation exposure of the fiber/resin composition effects curing of the first resin component to immobilize the composite and impart structural integrity thereto, whereby the composite may be handled, packaged, or further processed. Filament wound, braided, and pultruded articles are described, together with associated methods for forming such articles by filament winding, braiding and pultrusion. As a specific embodiment, a solid fuel rocket motor is disclosed comprising a solid fuel body in a filament wound fiber-resin composite casing formed by filament winding of the solid fuel body with resin-impregnated filament or rovings thereof.

Abstract: A process for manufacturing a metallized polymeric film to provide a structure possessing high metal-to-film adhesion and little, if any, tendency toward metal fracture is disclosed. In one embodiment of the process, at least one polyolefin layer is provided to a film which includes a substantially isotactic polymer having a degree of atacticity of no more than about 6%. The isotactic component is preferably polypropylene homopolymer. Other components include up to about 34% of an adhesive-promoting component which can be a C.sub.2 -C.sub.4 polymer, including homo-, co-, and terpolymers having C.sub.2 -C.sub.4 carbon chains, and a second isotactic polymer having a degree of atacticity of from about 6% to about 15%. The surface of the polyolefin layer is subjected to flame treatment followed by vacuum metallization of this surface (preferably with aluminum).

Abstract: A torque rod for a heavy duty motor vehicle includes a shaft and two ends, each end being selectively attachable to points on the vehicle's chassis. The rod is composed of a polymerizable composite material. The shaft is either of solid, hollow, or layered composition. As an option, the shaft includes two adjustably interlocking halves enclosed and overlapped by a slidable sleeve. The sleeve is provided with a hole for the insertion of a bonding and filling material to fix the selected interlocked position to fit the chassis as needed.

Abstract: A flexible multilayer label adapted for application to deformable thermoplastic packages, with such label being impervious to water and sufficiently resilient to avoid permanent deformation upon deflection. The label includes a thermoplastic stress-compensating stratum having a relatively elastic structure which has a Young's Modulus less than about 2800 Kg/cm.sup.2 and a lower surface adapted to be bonded to the outer surface of the thermoplastic package during in-mold labeling procedures. The label further includes a thermoplastic label stratum having a Young's Modulus which exceeds about 7030 Kg/cm.sup.2 and a smooth label surface. The label stratum is laminated to the upper surface of the stress-compensating stratum. The stress-compensating stratum structure accommodates the thermal stresses and package shrinkage inherent in such in-mold labeling procedures, as well as stresses imposed by deformation of the package in use.

Abstract: A container for use with a closure and a glass container having an access opening for a closure. The container was a crush strength increasing polyparaxylylene coating on at least one side of the glass container at a thickness of at least 0.1 microns to give at least 40% increased crush strength.

Abstract: A multilayer polymeric film having dead bend characteristics which are substantially planar isotropic is a laminate of at least two layers of one or more polymeric films, in which:A. each polymeric film layer is highly oriented in one direction, such that each polymeric film layer has dead bend properties with respect to bending deformations substantially normal to the direction or orientation; andB. the direction of orientation of each polymeric film layer forms an angle of at least about 30 degrees with the direction of orientation of each adjacent polymeric film layer.A method for making the multilayer polymeric film having dead bend characteristics also is provided.

Abstract: Hot-tackifying adhesive tape, the adhesive layer of which is an acrylic polymer which is nontacky or poorly tacky at ordinary room temperature, but at any temperature over a wide range of elevated temperatures, it becomes tacky and adheres upon contact to clean substrates without the application of significant pressure. Good bonds are immediately formed at a tackifying temperature without the necessity of crosslinking or other chemical reactions.

Abstract: A thermal camouflage fabric (12) comprising a heat reflective composite material (14, 16) which is coated on both of its sides with a protective material (18), the heat reflective composite material (14, 16) comprising at least one layer of a metal (14) and at least one layer of a flexible support material (16), the protective material (18) being such that it protects the heat reflective composite material (14, 16) from damage and such that it has predetermined thermal emission characteristics, the protective material (18) being securely bonded to the heat reflective composite material (14, 16), and the thermal camouflage fabric (12) being such that the heat reflective composite material (14, 16) is first formed from the said at least one layer of the metal (14) and the said at least one layer of the flexible support material (16), and is then woven.

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 hrs.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.24 hr.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: An ultrafine tube is produced by a method comprising the steps of applying a highly polymerized material on a substrate to form a resist layer on a surface of said substrate, applying a laser beam to the resist layer under such a condition that said resist layer is melted to form an ultrafine tube between the substrate and resist layer in the predetermined pattern.

Abstract: Fiber reinforced thermoplastic articles having an improved surface are produced in a stampable sheet which is produced from a reinforcing fiber mat having a thermoplastic support film.

Abstract: A plastic can is formed of a body member including a content protecting layer which is a tubular body formed by folding back and outward one side edge of a laminated film, bonding the folded parts such that air bubbles are not entrapped thereunder, overlapping the other side edge of the same laminated film on the bonded surface and bonding the side edges such that air bubbles are not entrapped between the side edges. An additional sheet is bonded all over the external surface of the laminated film except for a projecting stripe formed by the bonding of the side edges. A surfacing plastic layer covers the additional sheet and the projecting stripes. An apparatus is provided for forming the can, smoothing the surfacing plastic layer, forming the tube into can bodies, shaping the can bodies and sealing, lids on the ends of the cans.

Abstract: A glass container for holding hot liquids and having a shatter resistant plastic coating which resists fragmenting of the glass and which is serviceable for containers that are subjected to intermittent heating and cooling during use.

Abstract: A moldable fibrous composite having thermal and acoustical insulating characteristics and methods of production thereof are provided. The composite structure comprises a substrate, a middle layer and a non-woven top layer. The substrate may be in the form of a fibrous web or, alternatively, a thermoplastic film. The middle layer comprises mineral fibers of a sufficiently short length to substantially preclude interlocking of any of the mineral fibers with other fibers of the structure and to provide the structure with desired flexibility. The mineral fibers are present in a quantity sufficient to impart desired heat and sound insulating properties to the structure. The top layer may be made of organic fibers or a substantially uniform mixture of organic and inorganic fibers. In making the invention composite structure, the middle layer and the top layer are introduced onto the substrate, respectively. The three layers are thereafter consolidated, such as through needle punching.

Abstract: Apparatus and method for applying heat shrinkable film to containers and other articles having a vertical body position, e.g., the cylindrical body of a container, and one or two re-entrant portions, e.g., a shoulder on a bottle. A segment of film is applied to the vertical surface without heat shrinking and with one or two end portions overlapping the re-entrant part of the article. Heat is applied to the overlap or overlaps to shrink them onto the article.

Abstract: The present invention relates to a multiple-layered composition which eliminates the metal cover plate and is useful for effectively and durably sealing and plugging drain holes in workpieces. They are particularly useful in covering up drain holes in automotive bodies as a result of the unique properties which result from the total character of the multiple layers. The present invention also relates to a method of applying such a multiple-layered composition.

Abstract: A paint transfer article useful in forming a protective or colored coating on a compound structural component. The paint transfer article comprises an optional carrier liner sequentially covered with continuous layers of a colored layer having a colored base layer and an optional clear coating, a reinforcing layer, and an optional heat-activatable adhesive. The reinforcing layer has a sufficiently low glass transition temperature and a sufficiently high tensile modulus to resist damage to itself and the colored layer upon impact or under moderate pressure. Also a method of paint transfer using the article, a method of preparing the composite, a cold-formable painted metal bank, and a method for cold-forming painted parts.

Abstract: A binder strip for home or office use in binding document pages includes a binder sheet having a full back cover section and a narrow front cover attaching flange section with a spine section interposed between the two. The spine section is provided with a number of closely adjacent beads of hot melt glue and the attaching flange section has a strip of peel-off pressure sensitive adhesive affixed to a free edge thereof. A front cover for the binder is totally separate from the binder and initially may not even be a part of the binder. The front cover is processed by any suitable home or office copier, embossing, foil stamping, color printing or like machine capable of custom processing a single sheet of ordinary document size. The processed cover is then attached to the attaching flange by means of the pressure sensitive adhesive.

Abstract: A packaging film for photosensitive materials, which is a laminated film comprising at least three layers of an aluminum foil and two L-LDPE polyethylenic polymer layers laminated onto both sides of said aluminum foil, and in which:(a) said L-LDPE polyethylenic polymer layers contain 50% by weight or more of a low-pressure-processed, linear low-density polyethylene resin (L-LDPE),(b) at least one of said L-LDPE polyethylenic polymer layers contain at least 0.5% by weight of a light-shielding substance,(c) said two L-LDPE polyethylenic polymer layers, formed on both sides of said aluminum foil, have a thickness ratio of no higher than 50%, and(d) said laminated film has a moisture permeability of no higher than 10 g/m.sup.2 24 hr (40.degree. C. 90% RH). The light shielding substance is preferably carbon black.

Abstract: An enclosure (1) around a substrate (3) such as a telecommunications cable is made pressure retaining by the provision of re-entrant seals (5), generally V-shaped in cross-section, that are positioned at the region where the enclosure is bonded (4) to the substrate pressure within the enclosure thus tends to open the V rather than put the bond in peel. The re-entrant seals may be cut-to-length in the field and a leak path through the resulting open end (23) avoided by using pressure (P) within the enclosure to close the open end or to balance pressure across it.

Abstract: Heat-sealable sheet material for use in the fabrication of lapped-seam membrane. In a presently preferred construction, linear low density polyethylene film is adhered to one lateral border of cured polymerized EPDM composition; preferably the adhesive is protected with a removable liner, e.g., a polyester film until lapped-seam splicing is to be carried out. A transfer tape based on thermoplastic heat-sealable adhesive carried by a strippable liner also constitute part of the invention. The transfer tape is advantageously applied to a sheet of uncured EPDM compound and the resultant assembly subjected to heat and pressure to cure the compound and bond the heat-sealable adhesive firmly thereto.

Abstract: Multiple layer nonoriented heat sealable films are disclosed having a base substrate layer of poly(ethylene terephthalate) (polyester) or polyester copolymer and at least one heat sealable surface layer of a copolyester. The films are prepared by conventional cast or blown film coextrusion techniques.

Abstract: Articles useful as RF-sealable packaging materials comprise a halopolymer barrier layer coated onto, or adhered to, a carbon monoxide-containing polymer, wherein the carbon monoxide-containing polymer provides RF-sealability to the structure. Other layers of materials may be employed as part of the packaging material.

Abstract: The invention relates to a method of applying polymeric materials to the surface of a substrate by providing a layer of polymeric material on a release sheet and then subsequently transferring the polymeric material from the release sheet by the application of heat and pressure sufficient to effect adhesion of the polymeric material to the substrate and thereafter peeling the release sheet from the polymeric material. The invention is particularly concerned with the application of polymeric materials being capable of a secondary reaction at the time of application to the substrate or subsequent thereto.

Abstract: The invention is an improved multiple layer packaging sheet material which can be formed into closed and sealed packages suitable for holding products containing substantial fractions of cyanoacrylate. The invention depends on the positioning of high density polyethylene in direct contact with the cyanoacrylate-type product, and positioning a primer on the other side of the high density polyethylene. Preferred embodiments of the sheet structure include additional layers to provide barrier and abuse resistance properties, and the necessary adhesive materials to hold the various layers of the structure together with good adhesion. Additional layers are contemplated. The sheet structure can be formed into a package which positions the high density polyethylene adjacent the cyanoacrylate product, and between it and the other layers at all locations of contact between the cyanoacrylate product and the packaging sheet material.

Abstract: A sleeve, which finds particular application in the environmental sealing of joints between insulated pipes, comprises heat-recoverable polymeric sheet material provided at separate regions of a principle surface thereof with a layer of a heat-activatable adhesive for bonding the sheet to the pipe insulation, and a layer of a sealant to accommodate flexibility in the joint. A layer of a sealing material, having an elongation modulus greater than that of the sealant, overlies at least part of the sealant layer, to improve the pressure retention properties of the sleeve.

Abstract: A nonoriented, heat sealable, coextruded, moisture barrier film is disclosed. This film has a base layer ("A") of polypropylene homopolymer, polypropylene copolymer or combinations thereof, a heat sealant layer ("C") of polyester/copolyester or blends thereof and a tie layer ("B") of modified polyethylene homopolymer, modified polyethylene copolymer, modified polypropylene homopolymer, modified polypropylene copolymer, an unmodified polyethylene copolymer or combinations thereof between the base layer ("A") and the heat sealant layer ("C"). This film has three layers ("ABC") or five layers ("CBABC"). This film exhibits a very broad heat seal range and has a moisture vapor transmission rate of from about 0.20 to about 1.0 g/100in.sup.2 /24 hr. This film has a wide variety of applications as a packaging film including such demanding uses as the inside of a microwave popcorn bag. This film significantly improves the shelf life of microwave popcorn compared to conventional films used for this product.

Abstract: An easily openable packaging material for photographic photosensitive materials which comprises, a light-shielding heat-sealable film layer containing a lubricant, a light-shielding material and more than 50 wt. % of a high-pressure low-density polyethylene resin and being located as the inner layer, an aluminum foil layer which is laminated on the above heat-sealable film layer with a delamination resistance of greater than 400 g/15 mm width and on the heat-sealable film layer side of which an anchor coat layer is formed and, a heat-resistant flexible sheet layer which is laminated on the above aluminum foil layer and of which heat resistance is higher than the above heat-sealable film layer by 5.degree. C. or more.This packaging material can easily be torn by hand without a notch.

Abstract: A dimensionally recoverable article, preferably a heat-recoverable article, has on at least part of a surface thereof an adhesive composition that will cure by reaction of a plurality of mutually reactive components. The components are in the form of particles which are mixed together and which will fuse when heated. Preferred adhesives are based on combinations of an epoxy with a polyamide, carboxylic acid, phenolic resin or blocked isocyanate curing agent.The particulate adhesives show a synergistic increase in rate and/or level of cure when used in conjunction with a recoverable article.

Abstract: A nonoriented, heat sealable, coextruded, moisture barrier film is disclosed. This film has a base layer ("A") of polyethylene, preferably high density, a heat sealant layer ("C") of polyester/copolyester or blends thereof and a tie layer ("B") of modified polyethylene homopolymer, modified polyethylene copolymer, unmodified polyethylene copolymer or combinations thereof between the base layer ("A") and the heat sealant layer ("C"). This film has three layers ("ABC") or five layers ("CBABC"). This film exhibits a very broad heat seal range and has a moisture vapor transmission rate of from about 0.20 to about 1.0 g/100 in.sup.2 /24 hr. This film has a wide variety of applications as a packaging film including such demanding uses as the inside of a microwave popcorn bag. This film significantly improves the shelf life of microwave popcorn compared to conventional films used for this product. This film also exhibits excellent heat seal properties to itself as well as a wide variety of diverse substrates.

Abstract: The invention discloses a multiple layer packaging film, packages made therefrom and a method of opening the packages. The invention provides inseparable seal strength and in some cases hermetic seals, in combination with peelable ply separation opening for access to the contents of the package, while at the same time providing excellent barriers to transmission of oxygen and moisture. Certain embodiments provide for improved abuse resistance, excellent graphics, and other improvements. The method of opening the package depends on separating opposing ones of the package sidewalls, forcing the opening tear to be propagated partially through the film to a peelable layer interface, with subsequent ply separation along the interface to effect completion of opening of the package.