US20150197385A1 - Sealing cover having opening tap for containers and method for manufacturing the same - Google Patents

Sealing cover having opening tap for containers and method for manufacturing the same Download PDF

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Publication number
US20150197385A1
US20150197385A1 US14/222,970 US201414222970A US2015197385A1 US 20150197385 A1 US20150197385 A1 US 20150197385A1 US 201414222970 A US201414222970 A US 201414222970A US 2015197385 A1 US2015197385 A1 US 2015197385A1
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US
United States
Prior art keywords
layer
heat
sealing cover
sealing
adhesive resin
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
US14/222,970
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English (en)
Inventor
Se-Hwang WEI
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.)
SEAL AND PACK Co Ltd
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SEAL AND PACK Co Ltd
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Publication date
Application filed by SEAL AND PACK Co Ltd filed Critical SEAL AND PACK Co Ltd
Assigned to SEAL AND PACK CO., LTD. reassignment SEAL AND PACK CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WEI, SE-HWANG
Publication of US20150197385A1 publication Critical patent/US20150197385A1/en
Priority to US16/876,141 priority Critical patent/US20200277121A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B65D77/2028—Means for opening the cover other than, or in addition to, a pull tab
    • B65D77/2032—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container
    • B65D77/2044—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure
    • B65D77/2048—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut
    • B65D77/2056—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut the cover being weakened
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B1/00—Knobs or handles for wings; Knobs, handles, or press buttons for locks or latches on wings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • 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
    • B65D51/00—Closures not otherwise provided for
    • B65D51/18—Arrangements of closures with protective outer cap-like covers or of two or more co-operating closures
    • B65D51/20—Caps, lids, or covers co-operating with an inner closure arranged to be opened by piercing, cutting, or tearing
    • 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
    • B65D53/00—Sealing or packing elements; Sealings formed by liquid or plastics material
    • B65D53/04—Discs
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B3/00—Fastening knobs or handles to lock or latch parts
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C19/00—Other devices specially designed for securing wings, e.g. with suction cups
    • E05C19/08—Hasps; Hasp fastenings; Spring catches therefor
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C3/00—Fastening devices with bolts moving pivotally or rotatively
    • E05C3/12—Fastening devices with bolts moving pivotally or rotatively with latching action
    • E05C3/14—Fastening devices with bolts moving pivotally or rotatively with latching action with operating handle or equivalent member rigid with the latch
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2435/00—Closures, end caps, stoppers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/40—Closed containers
    • 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
    • B65D2251/00—Details relating to container closures
    • B65D2251/0003—Two or more closures
    • B65D2251/0006—Upper closure
    • B65D2251/0015—Upper closure of the 41-type
    • 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
    • B65D2251/00—Details relating to container closures
    • B65D2251/0003—Two or more closures
    • B65D2251/0068—Lower closure
    • B65D2251/0093—Membrane
    • 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
    • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/10—Container closures formed after filling
    • B65D2577/20—Container closures formed after filling by applying separate lids or covers

Definitions

  • the present invention relates generally to sealing covers having opening taps for containers and, more particularly, to a sealing cover for containers which has an increased adhesive area between an opening tap and the sealing cover so that a user can easily remove the sealing cover from a container, and a method for manufacturing the sealing cover.
  • sealing covers for containers have several functions such as a function of protecting the contents of a container, an easy-opening function, etc.
  • the functions of the sealing covers also continue to evolve for the sake of consumer convenience.
  • high-frequency induction heating is mainly used to seal the aperture of a container with a sealing cover, whereby the sealability of the sealing cover can be enhanced.
  • the sealing cover is disposed in a cap of the container before the container is coupled to the contents-filled container. Subsequently, the sealing cover adheres, through high-frequency induction heating, to a portion of the container that defines an aperture thereof.
  • the conventional sealing cover having the semi-circular tap is configured in such a way that an upper layer and a lower layer of the sealing cover adhere to each other only in a remaining semi-circular area of the sealing cover that is other than the tap. Therefore, if the strength with which the sealing cover adheres to the container is comparatively high, when a user grasps the semi-circular tap and pulls it to remove the sealing cover form the container, only the tap and a portion around the tap may be detached from the sealing cover rather than the entirety of the sealing cover being removed from the container. Moreover, there is a disadvantage in that, because of the problem, the size of the tap is limited.
  • FIGS. 1A and 1B illustrate a conventional sealing cover.
  • FIG. 1A shows a circular sealing cover 30 which is provided with at least one small tap 30 a formed on a circumferential edge thereof so that a consumer can use the tap 30 a to open a container 10 .
  • FIG. 1B shows a sealing cover 30 in which a polyester film layer 32 is formed on an upper surface of the sealing cover 30 , wherein only a half of the polyester film layer 32 adheres to the sealing cover 30 , and the other half thereof is used as an opening tap 32 a .
  • the sealing cover 30 is removed from the container 10 .
  • the sealing cover 30 includes an upper layer 32 which is formed of a polyester film, and a lower layer 34 which adheres to a lower surface of the upper layer 32 .
  • a band-shaped film 36 or paper is interposed between the upper and lower layers 32 and 34 and bonded to the upper layer 32 , and then the lower layer 34 adheres to the upper layer 32 .
  • a lower surface of the band-shaped film 36 does not adhere to the lower layer 34 .
  • the portion of the upper layer 32 that does not adhere to the lower layer 34 due to the band-shaped film 36 forms the opening tap 32 a.
  • the opening tap 32 a provided on the upper layer 32 may have almost circular shape, rather than having a semi-circular shape, so as to allow a user to easily grasp the opening tap 32 a .
  • the adhesive area between the polyester film that is the upper layer 32 and the lower layer 34 is further reduced. As a result, the delamination phenomenon is more easily caused.
  • an object of the present invention is to provide a sealing cover for containers in which the whole area of an upper layer provided with an opening tap substantially adheres to the lower layer with sufficient adhesive strength, whereby the sealing cover can be easily and reliably removed from a container regardless of whether the opening tap has a semi-circular shape or a circular shape.
  • Another object of the present invention is to provide a method for manufacturing the sealing cover.
  • the present invention provides a sealing cover having an opening tap for a container, including: a tap-forming layer provided with the opening tap; and a sealing layer formed under the tap-forming layer, the sealing layer having a function of substantially sealing the container.
  • the sealing cover may further include an intermediate substrate layer interposed between the tap-forming layer and the sealing layer, the intermediate substrate layer providing a close contact function and a shock absorbing function when a cap is coupled to the container.
  • the sealing layer may include: an aluminum foil layer isolating an interior of the container from an exterior thereof, the aluminum foil layer generating heat through high-frequency induction heating; and a heat-sealing resin layer provided under the aluminum foil layer, the heat-sealing resin layer being adhered to the container by heat generated from the aluminum foil layer.
  • a thickness of the aluminum foil layer may range from 0.009 mm to 0.05 mm.
  • the heat-sealing resin layer may be made of one among polyolefin, EVA (ethylene vinyl acetate), EMA (ethylene methacrylic acid) and ionomer depending on a material of the container so as to provide an easy peel seal function.
  • EVA ethylene vinyl acetate
  • EMA ethylene methacrylic acid
  • a thickness of the heat-sealing resin layer may range from 0.03 mm to 0.1 mm.
  • the heat-sealing resin layer may include a film produced by a blown film method or is formed by an extrusion coating method.
  • a lower surface of the intermediate substrate layer and the aluminum foil layer provided in an upper portion of the sealing layer may be adhered to each other by a dry lamination method using a solvent-based urethane adhesive or by an extrusion lamination method of melting a raw material containing polyethylene, EVA (ethylene vinyl acetate) or EMAA (ethylene-methacrylic acid-acrylate) and extrusion-laminating.
  • EVA ethylene vinyl acetate
  • EMAA ethylene-methacrylic acid-acrylate
  • the tap-forming layer may include: a surface layer formed of a PET (polyethylene terephthalate) or PP (polypropylene) film having no heat adhesive property, the surface layer having a thickness ranging from 0.012 mm to 0.05 mm, an inner or outer surface of the surface layer being printed by a gravure process; a first heat-adhesive resin layer formed under a lower surface of the surface layer; a folded film layer provided under a lower surface of the first heat-adhesive resin layer so as to form the opening tap, the folded film layer having a thickness ranging from 0.012 mm to 0.05 mm and being made of a PET (polyethylene terephthalate) or PP (polypropylene) film having no heat adhesive property, the folded film layer having a band shape formed in such a way that the PET or PP film folds double; and a second heat-adhesive resin layer adhering both to a lower surface of the folded film layer and to the first heat-adhe
  • the folded film layer may form the opening tap using a structure in which when the folded film layer is cut into a size capable of being inserted into a cap, inner surfaces of the folded film layer that face each other do not adhere to each other.
  • the folded film layer may be folded double on one side or both sides thereof.
  • the folded film layer may be folded double in such a way that a cylindrical film roll is pressed to be flat.
  • the first heat-adhesive resin layer and the second heat-adhesive resin layer may be formed by an extrusion lamination method and are made of any one among EVA (ethylene vinyl acetate), EMAA (ethylene-methacrylic acid-acrylate) and polyolefin-based adhesive resin containing polyethylene.
  • EVA ethylene vinyl acetate
  • EMAA ethylene-methacrylic acid-acrylate
  • polyolefin-based adhesive resin containing polyethylene any one among EVA (ethylene vinyl acetate), EMAA (ethylene-methacrylic acid-acrylate) and polyolefin-based adhesive resin containing polyethylene.
  • the first heat-adhesive resin layer and the second heat-adhesive resin layer may be made of ethylene-methacrylic acid-acrylate terpolymer resin which is produced by DuPont Inc. and sold in a brand name “Nucrel” that is able to adhere to the PET or PP film without conducting a separate chemical primer process.
  • the present invention provides a method for manufacturing a sealing cover for a container, the sealing cover including: a tap-forming layer provided with an opening tap; and a sealing layer formed under the tap-forming layer, the sealing layer having a function of substantially sealing the container, the method including: preparing a folded film layer formed by folding a PET (polyethylene terephthalate) or PP (polypropylene) film double, the PET or PP film having no heat adhesive property and having a thickness ranging from 0.012 mm to 0.05 mm; preparing a surface layer made of a PET or PP film having no heat adhesive property, the surface layer having a thickness ranging from 0.012 mm to 0.05 mm, an inner or outer surface of the surface layer being printed by a gravure method; preparing a sealing layer to be adhered to the container to isolate an interior of the container from an exterior thereof; a first adhesion operation of adhering the surface layer to an upper surface of the folded film layer using a first heat-adhesive resin
  • the first heat-adhesive resin layer may be formed by an extrusion lamination method of melting adhesive resin and extrusion-adhering the surface layer to the folded film layer.
  • the second heat-adhesive resin layer may be formed by an extrusion lamination method of melting adhesive resin equal to the adhesive resin forming the first heat-adhesive resin layer and extrusion-adhering the sealing layer both to the lower surface of the folded film layer and to the portion of the first heat-adhesive resin layer that is other than the lower surface of the folded film layer.
  • the folded film may form the opening tap using a structure in which when the folded film layer is cut into a size capable of being inserted into a cap, inner surfaces of the folded film layer that face each other do not adhere to each other.
  • the folded film layer may be folded double on one side or both sides thereof
  • the folded film layer may be folded double in such a way that a cylindrical film roll is pressed to be flat.
  • the first heat-adhesive resin layer and the second heat-adhesive resin layer may be made of any one among EVA (ethylene vinyl acetate), EMAA (ethylene-methacrylic acid-acrylate) and polyolefin-based adhesive resin containing polyethylene.
  • EVA ethylene vinyl acetate
  • EMAA ethylene-methacrylic acid-acrylate
  • polyolefin-based adhesive resin containing polyethylene any one among EVA (ethylene vinyl acetate), EMAA (ethylene-methacrylic acid-acrylate) and polyolefin-based adhesive resin containing polyethylene.
  • the first heat-adhesive resin layer and the second heat-adhesive resin layer may be made of ethylene-methacrylic acid-acrylate terpolymer resin which is produced by DuPont Inc. and sold in a brand name “Nucrel” that is able to adhere to the PET or PP film without conducting a separate chemical primer process.
  • an opening tap which is provided on an upper surface of the sealing cover can not only have a semi-circular shape but can also have an almost circular shape. Therefore, a consumer can more conveniently and easily open the container.
  • the sealing cover according to the present invention can provide the container sealing cover that has a more reliable structure.
  • FIGS. 1A and 1B show a conventional sealing cover in a closed ( FIG. 2A ) and open ( FIG. 2B ) arrangement, respectively;
  • FIG. 2 shows a delamination phenomenon of the conventional sealing cover in which only an opening tap is removed therefrom
  • FIG. 3A shows a plan view of an opening tap of a conventional sealing cover, while FIG. 3B shows a side elevation;
  • FIGS. 5A and 5B illustrate a method of removing the sealing cover according to the present invention from the container
  • FIG. 6 is a view showing the construction of the sealing cover according to the present invention.
  • FIGS. 7A-7C and FIGS. 8A-8C are views showing a method for manufacturing the sealing cover according to the present invention.
  • FIGS. 9A and 9B are views schematically illustrating a method of cutting out the sealing cover according to the present invention.
  • FIG. 4 is a perspective view illustrating a container provided with a container sealing cover (hereinafter, referred to as a sealing cover 400 ) according to the embodiment of the present invention.
  • the sealing cover 400 according to the present invention has an opening tap 100 a on an upper surface thereof.
  • An aperture 12 of the container is sealed with the sealing cover 400 .
  • Sealing the aperture 12 with the sealing cover 400 is sealing cover 400 can be achieved by high-frequency induction heating.
  • the sealing cover 400 is thermally sealed to the container 10 by disposing the sealing cover 400 inside a container cap (not shown), closing the cap, and then high-frequency induction heating.
  • FIGS. 5A and 5B illustrate a method of removing the sealing cover 400 from the container 10 .
  • the present invention is configured such that the sealing cover 400 is removed from the aperture 12 by rotating upwards the semi-circular or circular opening tap 100 a provided on the upper surface of the sealing cover 400 that has sealed the aperture 12 and pulling the opening tap 100 a in an y-axis direction.
  • FIG. 6 is a view showing the construction of the sealing cover 400 according to the present invention.
  • the sealing cover 400 includes three layers, that is, a tap-forming layer 100 , an intermediate substrate layer 200 and a sealing layer 300 .
  • the tap-forming layer 100 forms the opening tap 100 a .
  • the intermediate substrate layer 200 functions to ensure close contact between the container 10 and the sealing cover 400 when the cap (not shown) having the sealing cover 400 therein is tightened over the container 10 and prevent heat generated from an aluminum foil layer by high-frequency induction heating from being transferred to the upper portion of the sealing cover 400 .
  • the sealing layer 300 substantially seals the container 10 and isolates contents in the container 10 from the outside.
  • the tap-forming layer 100 includes a surface layer 102 , a first heat-adhesive resin layer 104 , a folded film layer 106 and a second heat-adhesive resin layer 108 .
  • the surface layer 102 is formed of a PET or PP film that has no heat adhesive property.
  • the thickness of the surface layer 102 ranges from 0.012 mm to 0.05 mm.
  • the inner or outer surface of the surface layer 102 can be printed by a gravure method.
  • the first heat-adhesive resin layer 104 adheres the folded film layer 106 to the surface layer 102 .
  • the folded film layer 106 is provided to form the opening tap and formed of a PET or PP film that has no heat adhesive property.
  • the thickness of the folded film layer 106 ranges from 0.012 mm to 0.05 mm.
  • the folded film layer 106 has a band shape formed in such a way that the PET or PP film folds double with a width ranging from 20 mm to 150 mm.
  • the folded film layer 106 can be formed by folding the band-shaped PET or PP film having a predetermined width in half
  • the width of the folded film layer 106 is determined in response to the diameter of the aperture 12 .
  • the second heat-adhesive resin layer 108 is provided under a lower surface of the folded film layer 106 .
  • the second heat-adhesive resin layer 108 adheres both to the lower surface of the folded film layer 106 and the first heat-adhesive resin layer 104 .
  • the intermediate substrate layer 200 is interposed between the tap-forming layer 100 and the sealing layer 300 .
  • the intermediate substrate layer 200 functions not only to provide a close contact effect and a shock absorbing effect when the cap (not shown) is coupled to a rim part of the container that defines the aperture 12 therein, but also to prevent heat generated from the aluminum foil layer 302 formed in a lower portion of the sealing cover from being transferred to the upper portion of the sealing cover when high-frequency induction heating adhesion is conducted.
  • the sealing layer 300 includes the aluminum foil layer 302 which substantially isolates the interior of the container 10 from the outside and generates heat through high-frequency induction heating, and a heat-sealing resin layer 304 which is provided under the aluminum foil layer 302 and is adhered to the rim part that defines the aperture 12 therein by heat generated from the aluminum foil layer 302 .
  • the heat-sealing resin layer 304 is formed of a film which is produced by a blown film method or by extrusion coating.
  • both lower surface of the folded film layer 106 and a portion of the folded film layer 106 that adheres to the surface layer 102 form the opening tap 100 a .
  • the opening tap 100 a has a double structure, the tensile strength thereof can be enhanced. Therefore, the present invention can prevent a phenomenon in which only the opening tap 100 a is removed from the sealing cover 400 when it is pulled.
  • the length of the part that forms the opening tap 100 a and the length of the part that adheres to the second heat-adhesive resin layer 108 are determined by a position at which the folded film layer 106 is cut to form the sealing cover 400 .
  • the position at which the folded film layer 106 is cut when the sealing cover 400 is manufactured can be appropriately adjusted in such a way that, in the case of the aperture that has a comparatively small area, both the length of the part that forms the opening tap 100 a and the length of the part that adheres to the second heat-adhesive resin layer 108 are sufficiently long, and in the case of the aperture that has a comparatively large area, the length of the part that forms the opening tap 100 a is comparatively short while the length of the part that adheres to the second heat-adhesive resin layer 108 is sufficiently long.
  • FIGS. 7 through 8 are views showing a method for manufacturing the sealing cover according to the present invention.
  • a PET or PP film which has no heat adhesive property and has a thickness ranging from 0.012 mm to 0.05 mm and a width ranging from 20 mm to 150 mm may be folded on both sides thereof to form a folded film layer 106 - 1 .
  • the PET or PP film may be folded in half to form a folded film layer 106 - 2 .
  • FIG. 7A-1 a PET or PP film which has no heat adhesive property and has a thickness ranging from 0.012 mm to 0.05 mm and a width ranging from 20 mm to 150 mm
  • the PET or PP film may be rolled in a cylindrical shape by bonding the opposite edges thereof to each other and then pressed to be flat, thus forming a folded film layer 106 - 3 .
  • heat adhesive properties means properties in which adhesive force occurs when it is heated, for example, by high-frequency induction heating.
  • the width of the PET or PP film that is used to form the folded film layer can be appropriately determined depending on the diameter of the aperture of the container.
  • the surface layer 102 , the intermediate substrate layer 200 and the sealing layer 300 are prepared.
  • the final shape thereof becomes the same as that of FIG. 7B , and it is only a matter of whether the folded film layer 106 is cut in a row or two rows when it is cut to have a predetermined size and circular shape in which the product is finally disposed in the cap.
  • the folded film layer 106 formed by the above-mentioned method adheres to the lower surface of the surface layer 102 that is the uppermost surface of the sealing cover 400 .
  • the surface layer 102 is made of a PET or PP film which has no heat adhesive property and high tensile strength, and the thickness of which ranges 0.012 mm to 0.05 mm.
  • Adhesion between the surface layer 102 and the folded film layer 106 is embodied by an extrusion lamination method in which adhesive resin is melted and applied therebetween and they are adhered to each other by extruding.
  • the first heat-adhesive resin layer 104 that has a thickness ranging from 0.015 mm to 0.04 mm and contains polyolefin-based resin such as polyethylene, etc.
  • EVA ethylene vinyl acetate
  • EAA ethylene acrylic acid
  • the surface layer 102 and the folded film layer 106 that is disposed under the first heat-adhesive resin layer 104 are made of PET films, ethylene-methacrylic acid-acrylate terpolymer resin, for example, which is produced by DuPont Inc. and sold in a brand name “Nucrel”, which can strongly adhere to a PET film without conducting a separate chemical primer process, is used.
  • the intermediate substrate layer 200 is formed of a polyolefin-based film or foam that has a thickness ranging from 0.03 mm to 3 mm.
  • the adhesion in the second-step adhesion process is embodied by extrusion lamination using the second heat-adhesive resin layer 108 which is made of ethylene-methacrylic acid-acrylate terpolymer resin that is the same material as that of the first heat-adhesive resin layer 104 .
  • the tap-forming layer 100 and the intermediate substrate layer 200 that have been formed through the above-mentioned process adhere at a lower surface thereof to the sealing layer 300 which substantially has container sealing function.
  • the sealing layer 300 includes the aluminum foil layer 302 which is disposed at an upper position, and a heat-sealing resin layer 304 which is disposed at a lower position and has an easy peel seal function such that it can be easily sealed to the container 10 .
  • the adhesion between the lower surface of the intermediate substrate layer 200 and the aluminum foil layer 302 of the sealing layer 300 is embodied by a dry lamination method which is a typical method of adhering plastic films to each other using a solvent-based urethane adhesive, or an extrusion lamination method in which the layers are laminated by melting raw material containing polyethylene, EVA (ethylene vinyl acetate), EMAA (ethylene-methacrylic acid-acrylate), etc. and by extruding the layers with the melted raw material.
  • a dry lamination method which is a typical method of adhering plastic films to each other using a solvent-based urethane adhesive
  • extrusion lamination method in which the layers are laminated by melting raw material containing polyethylene, EVA (ethylene vinyl acetate), EMAA (ethylene-methacrylic acid-acrylate), etc. and by extruding the layers with the melted raw material.
  • the sealing cover 400 is formed in a circular shape corresponding to the size of the cap by cutting or punching the half-finished product manufactured through the above-mentioned process.
  • FIGS. 9A and 9B are views schematically illustrating a method of cutting out the sealing cover 400 according to the present invention.
  • the length of the part that forms the opening tap 100 a and the length of the part that adheres to the second heat-adhesive resin layer 108 are determined by a position at which the folded film layer 106 is cut to form the sealing cover 400 .
  • the sealing cover 400 is formed such that the length of the part that forms the opening tap 100 a is comparatively short while the length of the part that adheres to the second heat-adhesive resin layer 108 is sufficiently long.
  • the sealing cover 400 is formed such that both the length of the part that forms the opening tap 100 a and the length of the part that adheres to the second heat-adhesive resin layer 108 are sufficiently long.
  • the opening tap which is provided on the upper surface of the sealing cover may not only have a semi-circular shape but may also have an almost circular shape, Therefore, a consumer can more conveniently and easily open the container.
  • the sealing cover according to the present invention can provide the container sealing cover that has a more reliable structure.
US14/222,970 2014-01-15 2014-03-24 Sealing cover having opening tap for containers and method for manufacturing the same Abandoned US20150197385A1 (en)

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USD810564S1 (en) * 2016-01-29 2018-02-20 Seal and Pack Co., LTD Seal sheet for packaging container
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US10604315B2 (en) 2014-02-05 2020-03-31 Selig Sealing Products, Inc. Dual aluminum tamper indicating tabbed sealing member
USD896633S1 (en) 2019-01-29 2020-09-22 Golden State Foods Corp. Container
USD896634S1 (en) 2019-01-29 2020-09-22 Golden State Foods Corp. Container
US10899506B2 (en) 2016-10-28 2021-01-26 Selig Sealing Products, Inc. Single aluminum tamper indicating tabbed sealing member
US10934069B2 (en) 2016-10-28 2021-03-02 Selig Sealing Products, Inc. Sealing member for use with fat containing compositions
US10954032B2 (en) 2012-09-05 2021-03-23 Selig Sealing Products, Inc. Tamper evident tabbed sealing member having a foamed polymer layer
US11148400B2 (en) 2016-04-06 2021-10-19 Tekni-Plex, Inc. Thermally laminated tab liner
US11254481B2 (en) 2018-09-11 2022-02-22 Selig Sealing Products, Inc. Enhancements for tabbed seal
US11708198B2 (en) 2018-07-09 2023-07-25 Selig Sealing Products, Inc. Grip enhancements for tabbed seal
US11787153B2 (en) 2016-04-06 2023-10-17 Tekni-Plex, Inc. Thermally laminated tab liner
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CN108437965A (zh) * 2018-03-27 2018-08-24 芜湖捷欧汽车部件有限公司 一种自定位塑料真空罐
KR20220039994A (ko) 2020-09-23 2022-03-30 조윤희 용기 밀봉용 커버
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US10954032B2 (en) 2012-09-05 2021-03-23 Selig Sealing Products, Inc. Tamper evident tabbed sealing member having a foamed polymer layer
US10604315B2 (en) 2014-02-05 2020-03-31 Selig Sealing Products, Inc. Dual aluminum tamper indicating tabbed sealing member
US10556732B2 (en) 2015-03-03 2020-02-11 Selig Sealing Products, Inc. Tabbed seal concepts
US11059644B2 (en) 2015-03-03 2021-07-13 Selig Sealing Products, Inc. Tabbed seal concepts
USD799318S1 (en) * 2016-01-29 2017-10-10 Seal and Pack Co., LTD Seal sheet for packaging container
USD801812S1 (en) * 2016-01-29 2017-11-07 Seal and Pack Co., LTD Seal sheet for packaging container
USD801811S1 (en) * 2016-01-29 2017-11-07 Seal and Pack Co., LTD Seal sheet for packaging container
USD810564S1 (en) * 2016-01-29 2018-02-20 Seal and Pack Co., LTD Seal sheet for packaging container
WO2017133209A1 (zh) * 2016-02-01 2017-08-10 广州施力包装材料有限公司 一种带有着力部件的电磁感应封口垫片及制造方法与封口方法
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US11148400B2 (en) 2016-04-06 2021-10-19 Tekni-Plex, Inc. Thermally laminated tab liner
US10934069B2 (en) 2016-10-28 2021-03-02 Selig Sealing Products, Inc. Sealing member for use with fat containing compositions
US10899506B2 (en) 2016-10-28 2021-01-26 Selig Sealing Products, Inc. Single aluminum tamper indicating tabbed sealing member
US11401080B2 (en) 2016-10-28 2022-08-02 Selig Sealing Products, Inc. Single aluminum tamper indicating tabbed sealing member
US11866242B2 (en) 2016-10-31 2024-01-09 Selig Sealing Products, Inc. Tabbed inner seal
US11708198B2 (en) 2018-07-09 2023-07-25 Selig Sealing Products, Inc. Grip enhancements for tabbed seal
US11724863B2 (en) 2018-07-09 2023-08-15 Selig Sealing Products, Inc. Tabbed seal with oversized tab
US11254481B2 (en) 2018-09-11 2022-02-22 Selig Sealing Products, Inc. Enhancements for tabbed seal
USD896634S1 (en) 2019-01-29 2020-09-22 Golden State Foods Corp. Container
USD896633S1 (en) 2019-01-29 2020-09-22 Golden State Foods Corp. Container

Also Published As

Publication number Publication date
WO2015108259A1 (ko) 2015-07-23
KR101407569B1 (ko) 2014-07-02
ES2633214T3 (es) 2017-09-19
EP2896576A1 (en) 2015-07-22
AU2014377790B2 (en) 2018-07-05
AU2014377790A1 (en) 2016-08-25
CN105934392A (zh) 2016-09-07
PL2896576T3 (pl) 2017-09-29
EP2896576B1 (en) 2017-05-03
CN105934392B (zh) 2018-01-30

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