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US20180111777A1 - Packaged flexible film and flexible film packaging system therefor - Google Patents

Packaged flexible film and flexible film packaging system therefor Download PDF

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Publication number
US20180111777A1
US20180111777A1 US15/334,321 US201615334321A US2018111777A1 US 20180111777 A1 US20180111777 A1 US 20180111777A1 US 201615334321 A US201615334321 A US 201615334321A US 2018111777 A1 US2018111777 A1 US 2018111777A1
Authority
US
United States
Prior art keywords
flexible film
compressible
core
cover strip
film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US15/334,321
Other languages
English (en)
Inventor
Peter Ian Carver
Michael Hawkins
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eastman Performance Films LLC
Original Assignee
CPFilms Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CPFilms Inc filed Critical CPFilms Inc
Priority to US15/334,321 priority Critical patent/US20180111777A1/en
Assigned to CPFILMS INC. reassignment CPFILMS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CARVER, PETER IAN, HAWKINS, MICHAEL
Priority to PCT/US2017/055833 priority patent/WO2018080780A1/fr
Publication of US20180111777A1 publication Critical patent/US20180111777A1/en
Assigned to EASTMAN PERFORMANCE FILMS, LLC reassignment EASTMAN PERFORMANCE FILMS, LLC CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: CP FILMS INC.
Priority to US16/504,887 priority patent/US10894682B2/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
    • B65H19/28—Attaching the leading end of the web to the replacement web-roll core or spindle
    • B65H19/283—Attaching the leading end of the web to the replacement web-roll core or spindle by applying adhesive to the core
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B63/00—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged
    • B65B63/04—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged for folding or winding articles, e.g. gloves or stockings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/02—Wrappers or flexible covers
    • B65D65/14—Wrappers or flexible covers with areas coated with adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/67—Containers, packaging elements or packages, specially adapted for particular articles or materials for web or tape-like material
    • B65D85/671—Containers, packaging elements or packages, specially adapted for particular articles or materials for web or tape-like material wound in flat spiral form
    • B65D85/672—Containers, packaging elements or packages, specially adapted for particular articles or materials for web or tape-like material wound in flat spiral form on cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/414—Winding
    • B65H2301/41419—Starting winding process
    • B65H2301/41427—Starting winding process involving arrangements for securing leading edge to core, e.g. adhesive tape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/414—Winding
    • B65H2301/41419—Starting winding process
    • B65H2301/41428—Starting winding process involving additional element between core and web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/16—Irregularities, e.g. protuberances
    • B65H2511/166—Irregularities, e.g. protuberances relative to diameter, eccentricity or circularity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/175—Plastic
    • B65H2701/1752—Polymer film

Definitions

  • the present invention relates to packaged flexible polymer films and packaging systems for flexible polymer films.
  • flexible films formed from polymeric materials and/or plastics are typically packaged at the manufacturing site as rolls, with the film wound onto a cylindrical supporting carrier formed from rigid plastic, cardboard or the like (known as a core).
  • the core is then enclosed and contained in a box, bag or other packaging to protect the film during transport and provide an aesthetically pleasing appearance to customers.
  • the flexible films are often packaged during manufacture in large and heavy “bulk” rolls; however, product distribution channel requirements demand that film wound on such bulk rolls be unwound and then rewound into smaller “commercial” rolls for shipping and eventual sale.
  • window films are often wound on bulk rolls of around 3000 meters at manufacture and then repackaged for sale to customers in relatively short rolls wherein 30.5 meters or less of material is wound on a 76.5 mm diameter plastic core.
  • Highly specialized flexible films such as metallized films for use in medical testing devices, electronic devices, displays and the like, are also packaged as rolls of material wound on a core.
  • the leading end of the film nearest the core is typically adhered to the core using a double-sided self-adhesive strip that runs transversely along the full width of the film at the leading edge.
  • a double-sided self-adhesive strip that runs transversely along the full width of the film at the leading edge.
  • the leading end of the film runs across the width of the wound film and is cut with a relatively sharp vertical right-angled edge that forms a ridge at the interface of the film's leading edge with surface of the core.
  • the double sided adhesive strip has a minimized (typically 25-50p) but nonetheless potentially impactful thickness and can create an even more severe imprint than the end of the film. It presents two ends rather than one and the general evenness of the thickness of adhesive strip over the entire area of adhesive, particularly hand-applied aerosol pressure sensitive adhesives, can be very poor.
  • the core surface itself may have defects or minute contaminants that impact its uniformity and smoothness.
  • Imprints or embossments created in films via the above are typically permanent such that, if use of the film is attempted, defects in the final product's functionality and/or aesthetic appearance are highly likely.
  • installation of this portion of the film from the roll on a vehicle or building window is often the source for consumer complaints and warranty claims.
  • One prior art attempt to overcome the embossment problem included chamfering the leading edge of the film so that the cut end of the film is angled or gradually reduced in thickness rather than presenting a sharp vertical end. It is difficult with such thin materials, however, to achieve any uniform angled cut of this kind, particularly at such a shallow angle as would be necessary to materially reduce the impact of the leading end on the imprint problem.
  • embossments remain a significant source of waste and inefficiency for the flexible films industry.
  • the films industry is in lock step with industry in general as it seeks out improved, sustainable packaging systems and for its products that reduce excess packaging material and waste.
  • the present invention relates to a packaged flexible film.
  • the packaged flexible film includes (i) a cylindrical core having an outer surface; (ii) a supply of flexible film wound about the core with a leading edge adjacent the outer surface and forming a connection ridge along the surface; and (iii) a cover strip comprising a compressed compressible cover material covering said connection ridge.
  • the compression of the compressible cover material is effected by a compression force that is applied to the compressible cover material by the film when wound about the core under tension.
  • the present invention relates to a packaging system for flexible film which includes a leading edge and a terminal edge and which is windable about a cylindrical core.
  • the packaging system includes (i) a cylindrical core having an outer surface; and (ii) a cover strip attachable to the outer surface.
  • the cover strip includes a compressible cover material and has dimensions sufficient for at least covering a connection ridge that is formed along the outer surface at said leading edge of the flexible film when the film is wound about the core.
  • the dimensions will extend from at least 1 ⁇ 4 inch in width and a length approximately equivalent to the longitudinal length of the cylindrical core, most commonly from 12 inches to 84 inches; however, it will be understood that rolled film packages with cores in excess of 120 inches are known in the art.
  • the present invention relates to a multilayer flexible film packaging tape for covering the connection ridge that is formed along the outer surface of a core at the leading edge of a flexible film when the film is wound about the core as part of a packaged flexible film.
  • the multilayer flexible film packaging tape includes a carrier substrate with a top surface and bottom surface; a compressible layer atop said top surface; and a mounting adhesive on said bottom surface.
  • the present invention relates to a method for packaging a flexible film onto a core with an outer surface.
  • the method includes (i) attaching a leading edge of said flexible film onto said outer surface of said core thereby forming a connection ridge; (ii) applying a cover strip over said connection ridge, said cover layer comprising a compressible cover material; and (iii) winding said flexible film around said core under tension such that said film applies compression force to said compressible material sufficient to deform said compressible material.
  • FIG. 1 is a side elevational view, partially in cross-section, of an embodiment of the packaged flexible film of the present invention with a cover strip as shown in FIG. 3 ;
  • FIG. 2 is a perspective view, partially in cross-section, of an embodiment of the packaged flexible film of the present invention with a cover strip as shown in FIG. 3 ;
  • FIG. 3 is a side cross-sectional view of an embodiment of the cover strip of the present invention.
  • FIG. 4 is a side elevational view, partially in cross-section, of an embodiment of the packaging system of the present invention with a cover strip as shown in FIG. 3 and with the flexible film shown partially wound about the core for illustration purposes only;
  • FIG. 5 is a perspective view, partially in cross-section, of an embodiment of the packaging system of the present invention with a cover strip as shown in FIG. 3 and with the flexible film shown partially wound about the core for illustration purposes only.
  • the present invention in a first aspect depicted in FIGS. 1 and 2 , relates to a packaged flexible film 10 .
  • the packaged flexible film 10 broadly includes (i) a cylindrical core 15 having an outer surface 17 ; (ii) a supply of flexible film 20 wound about the core 15 and (iii) a cover strip 30 including a compressed compressible cover material 35 .
  • the flexible film includes a leading edge 42 which is adjacent the outer surface 17 and which forms a connection ridge 45 along the outer surface 17 .
  • the flexible film 20 is attached to the outer surface 17 of the core 15 with an adhesive 19 such as pressure sensitive adhesive which adheres the flexible film 20 to the outer surface 17 of the core 15 generally along the leading edge 42 .
  • Pressure sensitive adhesives are well known in the art and may be formed for example from natural rubber, synthetic rubbers (e.g., styrene/butadiene copolymers (SBR) and styrene/isoprene/styrene (SIS) block copolymers), various (meth)acrylate (e.g., acrylate and methacrylate) copolymers and silicones.
  • SBR styrene/butadiene copolymers
  • SIS styrene/isoprene/styrene
  • silicones e.g., silicones.
  • Suitable pressure sensitive adhesives for attaching film 20 to the outer surface 17 of the core 15 are described for example in U.S. Pat. Nos. 5,415,912 and 6,414,073 and U.S. Published Application number US20100323191A1, the disclosures of which are incorporated herein by reference, as well as more generally in Benedek, Pressure - Sensi
  • the flexible film also includes a terminal edge 44 .
  • the cover strip 30 that includes the compressed compressible cover material 35 covers the connection ridge 45 .
  • the compression of the compressible cover material is effected by a compression force that is applied to the compressible cover material by the film when wound about the core under tension.
  • a compression force that is applied to the compressible cover material by the film when wound about the core under tension.
  • the compressible cover material 160 of the cover strip 130 of the packaging system of the present invention when used in conjunction with the packaged flexible film of the present invention, deforms, flows or migrates under this compression force such that compressed compressible cover material 35 is characterized by a reduced thickness over the connection ridge 45 when compared to the compressible cover material 160 in an uncompressed state as exemplified by the compressible cover material 160 of the cover strip 130 of the packaging system of the present invention.
  • Compounds and compositions suitable for the compressible cover materials used for the compressed compressible cover material are materials known in the art that deform, flow or migrate under compression such as the compression force applied by the wound film as described above.
  • Suitable materials include flexible and semi-rigid foams, in particular low density polyurethane foams and closed-cell vinyl foams, gels, elastomeric materials such as rubbers and polymeric compositions such as silicones, in particular compressible silicones, acrylics and the like.
  • suitable materials known in the art and commercially available include materials used in commercial flexible caulk applications such as Big Stretch® available from Sashco Inc. or KWIK SEAL® ULTRA Premium Siliconized Sealant available from DAP Products Inc.; hot melt PSAs such as described in U.S.
  • the cover strip 30 is attached to the leading edge 42 of the flexible film and to the outer surface 17 of the core, most preferably by adhesive 65 such as a pressure sensitive adhesive.
  • adhesive 65 such as a pressure sensitive adhesive.
  • Pressure sensitive adhesives are well known in the art and may be formed for example from natural rubber, synthetic rubbers (e.g., styrene/butadiene copolymers (SBR) and styrene/isoprene/styrene (SIS) block copolymers), various (meth)acrylate (e.g., acrylate and methacrylate) copolymers and silicones.
  • SBR styrene/butadiene copolymers
  • SIS styrene/isoprene/styrene
  • silicones e.g., acrylate and methacrylate
  • the flexible film 20 that is a component of the packaged flexible film of the present invention may be any flexible film, web or the like typically packaged concurrent with or after manufacturing as a roll wound on a core.
  • Non-limiting examples include films and webs and the like formed from PET, polypropylene, PVC, polyurethane, biaxially oriented polystyrene, cellulose triacetate, PTFE, polyamides and polyethylenes.
  • the cylindrical core 15 may be formed from any material known in the art for such a purpose. Suitable materials for forming the cylindrical core include various plastics and polymeric materials, particularly those processable by injection molding or extrusion processes, paperboard, cardboard and the like. Non-limiting examples of suitable polymeric materials include polyethylene, polypropylene, polyethylene terephthalate and polycarbonates. Typically, the cylindrical core (and therefore as a consequence its outer surface) is desirably stiff and rigid so as to properly support the flexible film and the materials for it are selected accordingly; however, it will be understood that the core and in particular its outer surface, may exhibit some degree of elasticity or flexibility.
  • the cover strip 30 is a multilayer flexible film packaging tape 50 as shown in FIG. 3 .
  • the tape 50 includes a carrier substrate 55 with a top surface 57 and bottom surface 59 ; a compressible layer 60 including compressible cover material atop said top surface 57 ; and a mounting adhesive 65 such as a pressure-sensitive adhesive on the bottom surface 59 .
  • the tape 50 covers the connection ridge 45 that is formed along the outer surface 17 of the core 15 at the leading edge 42 of the flexible film 20 when the film 20 is wound about the core 15 .
  • the compressible layer 60 of tape 50 is compressed by compression force applied thereto by the film when wound about the core under tension, thereby forming the compressed compressible cover material 35 of the packaged film of the present invention.
  • the multilayer flexible film packaging tape 50 may optionally include additional layers or components.
  • the tape may optionally include an adhesive between the compressible layer 60 and the carrier substrate 55 to improve structural integrity.
  • the tape may include a removable release liner 76 atop the compressible layer; a removable release liner 77 atop the mounting adhesive; or a combination thereof, i.e. a first removable release liner atop the compressible layer and a second removable release liner atop the mounting adhesive.
  • release liners such as those described typically serve a protective function and are removed prior to actual use of the multilayer flexible film packaging tape.
  • adhesive tape constructions useful for other end use applications, and methods for their manufacture are well known in art. Such tapes are commercially available and are described for example in WO 2016/106040.
  • foam tapes for sealing and cushioning applications are available from 3M, for example under 3M product codes 4116 , 4317 and 4516 .
  • a mounting tape with compensating compression for use with printing plates is commercially available from Lohmann under the tradename DupIoFLEX®.
  • the cover strip 30 may be a compressible coating covering the connection ridge 45 and applied by spray coating or other known coating deposition techniques prior to winding of the flexible film about the core.
  • the cover strip 30 may be a layer of a compressible extrudate covering the connection ridge 45 and applied by extrusion or other known application techniques prior to winding of the flexible film about the core.
  • Still another alternative for the cover strip 30 is a pre-formed cushioning or compressible foam attachable over the connection ridge 45 using an adhesive pre-applied to the connection ridge prior to attachment.
  • the packaged flexible film of the present invention is assembled by a method for packaging a flexible film onto a core with an outer surface.
  • the subject method another aspect of the present invention, includes (i) attaching a leading edge of the flexible film onto the outer surface of the core thereby forming a connection ridge; (ii) applying a cover strip over the connection ridge, the cover strip comprising a compressible cover material; and (iii) winding the flexible film around said core under tension such that said film apples compression force to said compressible material sufficient to deform said compressible material.
  • the attaching step (i) of the present invention optionally includes applying an adhesive to adhere the leading edge of the flexible film onto the outer surface of the core.
  • the attaching step (i) can optionally be a step of removably attaching the leading edge such that the leading edge is removable from the core for subsequent use.
  • the applying step (ii) optionally includes applying an adhesive to adhere the cover strip to the leading edge and the flexible film and to the surface of the core; however, one of ordinary skill will appreciate that such one or both adhesive application steps may not be required, if for example the cover strip is the multilayer flexible film packaging tape described above, as the tape includes a mounting adhesive layer.
  • the winding step (iii) may be performed using techniques and equipment known in the art and commercially available for example from Cattorini—Italy or Kobayashi Engineering Works, Ltd. It will be appreciated by a person of ordinary skill that winding variables such as film feed velocity and winder rotation speed, as well as film variables such as material, construction, thickness, dimensions and the like, will necessarily have to be considered and balanced to ensure that, as the film is wound upon the core, the film tension translates to application of a compression force to the compressible material of the cover strip sufficient to deform said compressible material.
  • the present invention in another aspect depicted in FIGS. 4 and 5 , relates to a packaging system 110 for a flexible film that is windable about a cylindrical core.
  • the system includes (i) a cylindrical core 115 having an outer surface 117 ; and (ii) a cover strip 130 that is attachable to the outer surface 117 and that includes a compressible cover material 160 .
  • the flexible film 120 has a leading edge 142 and a terminal edge 144 and the cover strip 130 has dimensions sufficient for covering at least a connection ridge 145 that is formed along said outer surface 117 at said leading edge 142 of said flexible film 120 when the flexible film 120 is wound about the core.
  • the packaging system also optionally includes an adhesive 119 to adhere and attach the flexible film 120 onto the outer surface 117 of the core 115 generally along the leading edge 142 as well as an optional adhesive 165 to adhere the cover strip 130 over the connection ridge 145 .
  • the compressible cover material 160 of the cover strip 130 is compressed by the flexible film 120 when wound about the core 115 under tension and deforms, flows or migrates under this compression force such that its thickness over the connection ridge as part of the flexible film package of the present invention is reduced.
  • the compressible material is thereby compressed to form the compressed compressible cover material 35 of the packaged flexible film of the present invention as described above.
  • the thickness of the compressed compressible cover material over the connection ridge 145 is reduced compared to the compressible cover material 160 of the cover strip 130 and accordingly is less than the thickness of the compressible cover material.
  • the cover strip 130 is a multilayer flexible film packaging tape 50 as described herein above and depicted at FIG. 3 . Nonetheless, one of ordinary skill will appreciate that other embodiments may be contemplated.
  • the cover strip 130 may be a compressible coating covering the connection ridge 145 and applied by spray coating or other known coating deposition techniques prior to winding of the flexible film 120 about the core 115 .
  • the cover strip 130 may be a layer of a compressible extrudate for covering the connection ridge 145 and applied by extrusion or other known application techniques prior to winding of the flexible film 120 about the core 115 .
  • Compounds and compositions suitable for the compressible cover material 130 are materials known in the art to deform, flow or migrate under compression such as the compression force applied by the wound film as described above.
  • Suitable materials include flexible and semi-rigid foams, in particular polyethylene foams, low density polyurethane foams and closed-cell vinyl foams, gels, elastomeric materials such as rubbers and polymeric compositions such as silicones, in particular compressible silicones, acrylics and the like.
  • suitable materials known in the art and commercially available include materials used in commercial flexible caulk applications such as Big Stretch® available from Sashco Inc. or KWIK SEAL® ULTRA Premium Siliconized Sealant available from DAP Products Inc.; hot melt PSAs such as described in U.S. Pat.
  • connection ridge 45 covers the connection ridge 45 and helps protect against the creation of undesirable embossment in the flexible film 20 by the connection ridge 45 while also avoiding formation of a separate seam or edge that itself could create an embossment risk.
  • the cover strip 130 is attached to the leading edge 142 of the flexible film 120 and to the outer surface 117 of the core 115 , more preferably with an adhesive 119 such as pressure sensitive adhesive.
  • Pressure sensitive adhesives are well known in the art and may be formed for example from natural rubber, synthetic rubbers (e.g., styrene/butadiene copolymers (SBR) and styrene/isoprene/styrene (SIS) block copolymers), various (meth)acrylate (e.g., acrylate and methacrylate) copolymers and silicones.
  • SBR styrene/butadiene copolymers
  • SIS styrene/isoprene/styrene
  • silicones e.g., acrylate and methacrylate
  • the flexible film 120 for use with the packaging system of the present invention may be any flexible film, web or the like typically packaged concurrent with or after manufacturing as a roll wound on a core.
  • Non-limiting examples include films and webs and the like formed from PET, polypropylene, PVC, polyurethane, biaxially oriented polystyrene, cellulose triacetate, PTFE, polyamides and polyethylenes.
  • the cylindrical core 115 may be formed from any material known in the art for such a purpose. Suitable materials for forming the cylindrical core include various plastics and polymeric materials, particularly those processable by injection molding or extrusion processes, paperboard, cardboard and the like. Non-limiting examples of suitable polymeric materials include polyethylene, polypropylene, polyethylene terephthalate and polycarbonates. Typically, the cylindrical core is desirably stiff and rigid so as to properly support the flexible film and the materials for it are selected accordingly; however, it will be understood that the core and in particular its outer surface, may exhibit some degree of elasticity or flexibility.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wrappers (AREA)
  • Laminated Bodies (AREA)
  • Packaging Of Machine Parts And Wound Products (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
US15/334,321 2016-10-26 2016-10-26 Packaged flexible film and flexible film packaging system therefor Abandoned US20180111777A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US15/334,321 US20180111777A1 (en) 2016-10-26 2016-10-26 Packaged flexible film and flexible film packaging system therefor
PCT/US2017/055833 WO2018080780A1 (fr) 2016-10-26 2017-10-10 Film souple emballé et système d'emballage de film souple associé
US16/504,887 US10894682B2 (en) 2016-10-26 2019-07-08 Packaged flexible film and flexible film packaging system therefor

Applications Claiming Priority (1)

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US15/334,321 US20180111777A1 (en) 2016-10-26 2016-10-26 Packaged flexible film and flexible film packaging system therefor

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US20190330002A1 (en) 2019-10-31
US10894682B2 (en) 2021-01-19

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