US20150274393A1 - Reclosable Flowpack - Google Patents
Reclosable Flowpack Download PDFInfo
- Publication number
- US20150274393A1 US20150274393A1 US14/433,823 US201314433823A US2015274393A1 US 20150274393 A1 US20150274393 A1 US 20150274393A1 US 201314433823 A US201314433823 A US 201314433823A US 2015274393 A1 US2015274393 A1 US 2015274393A1
- Authority
- US
- United States
- Prior art keywords
- flowpack
- end portion
- flap
- reclosable
- sensitive adhesive
- 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
Links
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims abstract description 41
- 238000005304 joining Methods 0.000 claims abstract description 4
- 239000013047 polymeric layer Substances 0.000 claims abstract description 3
- 239000010410 layer Substances 0.000 claims description 32
- 239000004922 lacquer Substances 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000002390 adhesive tape Substances 0.000 description 3
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920003052 natural elastomer Polymers 0.000 description 2
- 229920001194 natural rubber Polymers 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 229920003051 synthetic elastomer Polymers 0.000 description 2
- 239000005061 synthetic rubber Substances 0.000 description 2
- 229920000298 Cellophane Polymers 0.000 description 1
- 101001017827 Mus musculus Leucine-rich repeat flightless-interacting protein 1 Proteins 0.000 description 1
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical compound C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Images
Classifications
-
- 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
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
- B65D31/02—Bags or like containers made of paper and having structural provision for thickness of contents with laminated walls
-
- 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
- B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
- B65D75/52—Details
- B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
- B65D75/5894—Preformed openings provided in a wall portion and covered by a separate removable flexible element
-
- 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
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/004—Information or decoration elements, e.g. level indicators, detachable tabs or coupons
-
- 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
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/14—Suspension means
-
- 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
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/16—End- or aperture-closing arrangements or devices
- B65D33/18—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps
- B65D33/20—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps using pressure-sensitive 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
- B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
- B65D75/52—Details
- B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
- B65D75/5855—Peelable seals
-
- 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
- B65D2575/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
- B65D2575/52—Details
- B65D2575/58—Opening or contents-removing devices added or incorporated during package manufacture
- B65D2575/586—Opening or contents-removing devices added or incorporated during package manufacture with means for reclosing
Definitions
- the present invention is related to a reclosable flowpack.
- Reclosable flowpacks are well known by those skilled in the art.
- the reclose means are either of a mechanical kind, such as zips, or based on adhesive tapes. Zips are for example disclosed in documents U.S. Pat. No. 5,561,966 or U.S. Pat. No. 4,894,975.
- Reclosable flowpacks comprising adhesive tapes are for example disclosed in documents U.S. Pat. No. 5,078,509, U.S. Pat. No. 4,622,799 and US 2004/0091183.
- EP 1 939 106 discloses a reclosable flowpack comprising a fin seal, said fin seal comprising an adhesive used both for closing the package during the shelf life of the product and for reclosing it after a first use.
- Document WO 01/10736 discloses a reclosable packaging with two permanent non-peelable cross-seals. This packaging comprises a top fold but has no flap fold.
- the present invention is an alternative to those known systems, presenting several advantages, such as the possibility to increase the volume of the pack upon reclosing, providing an easy access to the packaged items and reducing the risk of having the packaged goods in contact with the adhesive tape.
- the present invention is related to a reclosable flowpack comprising:
- FIG. 1 represents a schematic front view of a closed flowpack according to the invention, showing the position of the cross-sections (AA and BB) of the following figures.
- FIG. 2 represents a schematic cross-section (BB) of a cross seal of a flowpack according to the invention before opening.
- FIG. 3 represents a schematic cross-section (BB) of a cross seal of another flowpack according to the invention before opening.
- FIG. 4 a represents a schematic cross-section (AA) of the flowpack of FIG. 3 before opening.
- FIG. 4 b represents a schematic cross-section (AA) of the flowpack of FIG. 4 a after peeling the fin seal.
- FIG. 4 c represents a schematic cross-section (AA) of the flowpack of FIG. 4 a after unfolding the lower-end portion of the folded film.
- FIG. 4 d represents a schematic cross-section (AA) of the flowpack of FIG. 4 a after the removal of the transfer tape, and reclosing.
- FIG. 5 represents a schematic cross-section (AA) of another flowpack according to the invention, wherein the pressure-sensitive adhesive is located on the lower-end portion of the folded film.
- FIG. 6 represents a schematic cross-section (AA) of another flowpack according to the invention, wherein the pressure-sensitive adhesive is located on the upper-end portion of the folded film.
- the present invention is related to a reclosable flowpack 1 essentially made of a folded polymeric film 6 .
- a flowpack is usually formed in a form fill seal machine.
- a flat polymeric film from a reel is fed to a first folding unit wherein the film is shaped in the form of a tube.
- the side ends of the film are hanging out of the formed tube and are sealed together, according to an inside-inside seal, forming a fin seal.
- the tube is then flattened, forming a top and a bottom fold, the flap being located somewhere in the middle. Due to manufacturing constraints, the flap fold is usually spaced away from both the top and the bottom folds.
- Cross seals are then performed on the tube to produce a closed package, and cross cuts define the individual package.
- a first part of the cross seals is located between the top fold and the flap fold, and a second part of the cross seals is located between the bottom fold and the flap fold, so that when only the fin seal is opened, the access to the packaged goods is difficult.
- the flowpack 1 of the invention is closed by two peelable cross seals 7 and a flap 10 comprising a peelable fin seal 2 joining an upper-end portion 5 of the folded film 6 and a lower-end portion 8 of the folded film.
- the flowpack 1 further comprises a pressure-sensitive adhesive (PSA) 3 protected by a transfer tape 4 .
- PSA pressure-sensitive adhesive
- the pressure-sensitive adhesive 3 is located under a flap 10 .
- the transfer tape 4 is protected by the flap 10 , which can advantageously be peelably sealed in the cross seal area onto the flowpack body, as represented in FIG. 2 (peelable seal 14 ).
- the seal is advantageously performed by sealing the inner layer (sealant layer) of the upper-end portion 5 of the flap hanging out of the lower-end portion 8 of the flap on the external surface of the flowpack 1 .
- transfer tape 4 or “release tape 4 ” in the present invention is meant a layer protecting the pressure-sensitive adhesive 3 (PSA, also called permanent tacky adhesive), said layer being easily peeled off from the pressure-sensitive adhesive 3 , i.e. the adhesion between the transfer tape and the PSA being lower than the adhesion between the folded polymeric sheet and the PSA.
- PSA pressure-sensitive adhesive
- peelable is meant that the seal can be broken by delamination at the original interface (adhesive failure), or by propagating a fracture through a specially-designed peelable layer (cohesive failure), or by delaminating one of the film at an interface between two layers (adhesive failure between two layers).
- the flowpack 1 is first opened by breaking the peelable fin seal 2 and the parts 11 of the cross seals 7 located between the flap 10 and the top fold 12 of the flowpack 1 . This peeling is obtained by tearing the upper-end portion 5 of the folded film 6 from the lower-end portion 8 .
- the lower-end portion 8 of the folded film is then unfolded, as represented in FIG. 4 c , thereby uncovering the transfer tape 4 .
- An advantage of the presence of the unfolded lower-end portion 8 is that, in reclosed position, it improves the tightness of the reclosed flowpack and reduces the risk of having the package goods in direct contact with the pressure-sensitive adhesive 3 .
- the length “z” of the lower-end portion 8 of the film is at least 5 mm, preferably at least 8 mm, more preferably at least 10 mm.
- the transfer tape 4 is then removed and the flowpack is reclosed by folding the upper-end portion 5 of the folded film 6 onto the pressure-sensitive adhesive 3 , forming a lap seal as represented in FIG. 4 d.
- the pressure-sensitive adhesive 3 can be located at several positions, as represented in FIGS. 2 , 3 , 5 and 6 .
- the pressure-sensitive adhesive 3 is located on the external side of the folded film, with the transfer tape 4 on the side oriented towards the lower-end portion 8 of the folded film.
- the total perimeter of the flowpack can be enlarged by the length of the upper-end portion 8 of the film exceeding the area covered by the adhesive 3 .
- the length “z” of said lower-end portion 8 is smaller than the distance “y” between the flap fold 13 and the top fold 12 of the flowpack 1 , increased by half the length “x” of the upper-end portion 5 of the flap 1 , minus half the width of the adhesive 3 .
- the pressure-sensitive adhesive 3 can be located on the lower-end portion 8 of the folded film 6 .
- the flowpack 1 can gain more space when reclosed.
- the pressure-sensitive adhesive 3 and the transfer tape 4 are well protected by the flap during the shelf life of the flowpack 1 .
- the pressure-sensitive adhesive can be located on the upper-end portion 5 of the folded film 6 , as represented in FIG. 6 . This position ensures the possibility of having the largest possible reclosed flowpack 1 , but the transfer tape 4 and the pressure-sensitive adhesive are less protected during the shelf life of the flowpack 1 .
- Typical structures for flowpack films/sheets suitable for the invention are:
- Pressure-sensitive adhesives usually have compositions based on natural and/or synthetic rubber, optionally used in combination with modified cellophanes, phenolformaldehyde resins or waxes.
- polymers based on styrene, (meth)acrylic acid or vinyl ether are widely used, alone or as a mixture.
- silicone resins may also be employed. Compositions including mixtures of natural and synthetic rubbers and copolymers of (meth)acrylic acid and styrene are preferred.
- pressure-sensitive adhesives are deposited onto the substrate (web) at a thickness of approximately 1 to 5 g/m 2 .
- Pressure-sensitive adhesive can be applied in the form of a solution or of a dispersion, or even in the molten state. Coating-deposition techniques well known by those skilled in the art may be employed, such as, for example, heliographic or flexographic printing, or offset printing.
- the flap 10 directly adheres to the pressure-sensitive adhesive 3 .
- the pressure-sensitive adhesive 3 is deposited on a transfer tape 4 slitted in the right dimensions, and then applied to the film 6 before or during the manufacturing of the flowpack 1 .
- Example of suitable commercially available pressure-sensitive adhesives are produced by Henkel under the grade names 22-263, 22-272, 22-392, 22-477, 22-848, 22-861 or produced by Sun Chemical under the grade names S7188, S7883, S7936, S7979, S7985, S8011, S8039, S8041, S8044, S8046, S8057, S8078, S8083, S8093, S8095, S8110, S9044, C1225, S8124, S8129, S8130.
Abstract
The present invention is related a reclosable flowpack comprising: a film (6) comprising one or more polymeric layer(s),—a top fold, a flap fold and a flap, said flap comprising a peelable fm seal joining an upper- end portion and a lower-end portion of said film,—two peelable cross seals closing both ends of the flowpack,—a pressure-sensitive adhesive, the position of said pressure-sensitive adhesive and said flap allowing, after the flowpack has been opened by peeling the fin seal, the reclosing of the flowpack by unfolding the lower-end portion and folding the upper-end portion of the film onto the pressure-sensitive adhesive for forming a lap seal.
Description
- The present invention is related to a reclosable flowpack.
- Reclosable flowpacks are well known by those skilled in the art. The reclose means are either of a mechanical kind, such as zips, or based on adhesive tapes. Zips are for example disclosed in documents U.S. Pat. No. 5,561,966 or U.S. Pat. No. 4,894,975.
- Reclosable flowpacks comprising adhesive tapes are for example disclosed in documents U.S. Pat. No. 5,078,509, U.S. Pat. No. 4,622,799 and US 2004/0091183. For example,
EP 1 939 106 discloses a reclosable flowpack comprising a fin seal, said fin seal comprising an adhesive used both for closing the package during the shelf life of the product and for reclosing it after a first use. - Document WO 01/10736 discloses a reclosable packaging with two permanent non-peelable cross-seals. This packaging comprises a top fold but has no flap fold.
- The present invention is an alternative to those known systems, presenting several advantages, such as the possibility to increase the volume of the pack upon reclosing, providing an easy access to the packaged items and reducing the risk of having the packaged goods in contact with the adhesive tape.
- The present invention is related to a reclosable flowpack comprising:
-
- a polymeric film comprising one or more polymeric layer(s),
- a top fold, a flap fold and a flap, said flap comprising a peelable fin seal joining an upper-end portion and a lower-end portion of said film,
- two peelable cross seals closing both ends of the flowpack,
- a pressure-sensitive adhesive,
the position of said pressure-sensitive adhesive and said flap allowing, after the flowpack has been opened by peeling the fin seal, the reclosing of the flowpack by unfolding the lower-end portion and folding the upper-end portion of the film onto the pressure-sensitive adhesive for forming a lap seal.
- Preferred embodiments of the present invention disclose at least one or a suitable combination of the following features:
-
- the pressure-sensitive adhesive is located on the external surface of the flowpack, under the flap,
- the pressure-sensitive adhesive is protected by a transfer tape,
- the lengths of the lower-end portion and upper-end portion of the flap and the distance between the top fold and the flap fold are selected so that, when reclosed, said lower-end portion remains unfolded,
- the pressure-sensitive adhesive is in contact with the flap fold,
- the cross seals join the edge of the flap to the external side of the flowpack,
- the film comprises an oriented polymer layer and an aluminium layer,
- the opening force of the peelable fin seal according to ASTM D1876 is comprised between 5 and 25 N/15 mm, preferably between 10 and 20 N/15 mm,
- the reclosable flowpack comprises a hanging hole located in one of the cross seals,
- the length of the upper-end portion is larger than the length of the lower-end portion of the flap,
- the length of the lower-end portion is comprised between 60 percent and 90 percent of the length of the upper-end portion,
- the upper-end portion of the flap hanging out of the lower-end portion of the flap is peelably sealed on the external surface of the flowpack,
- the structure of the film is selected from heat seal lacquer/PET/print layer/PE, or OPP/ print layer/PE, or OPP/print layer/OPP, or print layer/OPP/metalized-OPP/seal layer and print layer/OPP/seal layer,
- after opening and reclose, the flowpack is enlarged by the length of the upper-end portion of the film,
- the top fold is spaced apart from the flap fold.
-
FIG. 1 represents a schematic front view of a closed flowpack according to the invention, showing the position of the cross-sections (AA and BB) of the following figures. -
FIG. 2 represents a schematic cross-section (BB) of a cross seal of a flowpack according to the invention before opening. -
FIG. 3 represents a schematic cross-section (BB) of a cross seal of another flowpack according to the invention before opening. -
FIG. 4 a represents a schematic cross-section (AA) of the flowpack ofFIG. 3 before opening. -
FIG. 4 b represents a schematic cross-section (AA) of the flowpack ofFIG. 4 a after peeling the fin seal. -
FIG. 4 c represents a schematic cross-section (AA) of the flowpack ofFIG. 4 a after unfolding the lower-end portion of the folded film. -
FIG. 4 d represents a schematic cross-section (AA) of the flowpack ofFIG. 4 a after the removal of the transfer tape, and reclosing. -
FIG. 5 represents a schematic cross-section (AA) of another flowpack according to the invention, wherein the pressure-sensitive adhesive is located on the lower-end portion of the folded film. -
FIG. 6 represents a schematic cross-section (AA) of another flowpack according to the invention, wherein the pressure-sensitive adhesive is located on the upper-end portion of the folded film. -
- 1: flowpack
- 2: peelable fin seal
- 3: pressure-sensitive adhesive
- 4: transfer tape
- 5: upper end of the folded film (upper-end portion)
- 6: foldable material (polymer film/sheet/multilayer structure)
- 7: peelable cross seal
- 8: lower end of the folded film (lower-end portion)
- 9: hanging hole
- 10: flap
- 11: part of the cross seals located between the flap and the top fold of the flowpack
- 12: top fold
- 13: flap fold
- 14: peelable seal maintaining the flap in position during the shelf life of the flowpack.
- The present invention is related to a
reclosable flowpack 1 essentially made of a foldedpolymeric film 6. - In the following description, the expressions “polymeric film”, “film” or “sheet” are used in an equivalent manner.
- A flowpack is usually formed in a form fill seal machine. In such a machine, a flat polymeric film from a reel is fed to a first folding unit wherein the film is shaped in the form of a tube. The side ends of the film are hanging out of the formed tube and are sealed together, according to an inside-inside seal, forming a fin seal. The tube is then flattened, forming a top and a bottom fold, the flap being located somewhere in the middle. Due to manufacturing constraints, the flap fold is usually spaced away from both the top and the bottom folds. Cross seals are then performed on the tube to produce a closed package, and cross cuts define the individual package. Due to the position of the flap, a first part of the cross seals is located between the top fold and the flap fold, and a second part of the cross seals is located between the bottom fold and the flap fold, so that when only the fin seal is opened, the access to the packaged goods is difficult.
- The
flowpack 1 of the invention is closed by two peelable cross seals 7 and aflap 10 comprising apeelable fin seal 2 joining an upper-end portion 5 of the foldedfilm 6 and a lower-end portion 8 of the folded film. Theflowpack 1 further comprises a pressure-sensitive adhesive (PSA) 3 protected by atransfer tape 4. The pressure-sensitive adhesive 3 is located under aflap 10. In this location, thetransfer tape 4 is protected by theflap 10, which can advantageously be peelably sealed in the cross seal area onto the flowpack body, as represented inFIG. 2 (peelable seal 14). In that case, the seal is advantageously performed by sealing the inner layer (sealant layer) of the upper-end portion 5 of the flap hanging out of the lower-end portion 8 of the flap on the external surface of theflowpack 1. - By “
transfer tape 4” or “release tape 4” in the present invention is meant a layer protecting the pressure-sensitive adhesive 3 (PSA, also called permanent tacky adhesive), said layer being easily peeled off from the pressure-sensitive adhesive 3, i.e. the adhesion between the transfer tape and the PSA being lower than the adhesion between the folded polymeric sheet and the PSA. - By “peelable” is meant that the seal can be broken by delamination at the original interface (adhesive failure), or by propagating a fracture through a specially-designed peelable layer (cohesive failure), or by delaminating one of the film at an interface between two layers (adhesive failure between two layers).
- As represented in
FIGS. 4 a to 4 b, theflowpack 1 is first opened by breaking thepeelable fin seal 2 and theparts 11 of the cross seals 7 located between theflap 10 and thetop fold 12 of theflowpack 1. This peeling is obtained by tearing the upper-end portion 5 of the foldedfilm 6 from the lower-end portion 8. - In order to reclose the
flowpack 1, the lower-end portion 8 of the folded film is then unfolded, as represented inFIG. 4 c, thereby uncovering thetransfer tape 4. An advantage of the presence of the unfolded lower-end portion 8 is that, in reclosed position, it improves the tightness of the reclosed flowpack and reduces the risk of having the package goods in direct contact with the pressure-sensitive adhesive 3. In order to reduce the risk of having the package goods in direct contact with the pressure-sensitive adhesive 3, the length “z” of the lower-end portion 8 of the film is at least 5 mm, preferably at least 8 mm, more preferably at least 10 mm. - The
transfer tape 4 is then removed and the flowpack is reclosed by folding the upper-end portion 5 of the foldedfilm 6 onto the pressure-sensitive adhesive 3, forming a lap seal as represented inFIG. 4 d. - The pressure-
sensitive adhesive 3 can be located at several positions, as represented inFIGS. 2 , 3, 5 and 6. In the embodiment ofFIGS. 2 and 3 , the pressure-sensitive adhesive 3 is located on the external side of the folded film, with thetransfer tape 4 on the side oriented towards the lower-end portion 8 of the folded film. - In that case, the total perimeter of the flowpack can be enlarged by the length of the upper-
end portion 8 of the film exceeding the area covered by the adhesive 3. This induces an enlargement of the size of the flowpack by about half the length “x” of the upper-end portion 5 of theflap 10. - In order to be able to reclose the package without folding the lower-
end portion 8 of the film forming the flowpack, in the example ofFIG. 2 , the length “z” of said lower-end portion 8 is smaller than the distance “y” between theflap fold 13 and thetop fold 12 of theflowpack 1, increased by half the length “x” of the upper-end portion 5 of theflap 1, minus half the width of the adhesive 3. - Alternatively, as represented in
FIG. 5 , the pressure-sensitive adhesive 3 can be located on the lower-end portion 8 of the foldedfilm 6. In that case, theflowpack 1 can gain more space when reclosed. In both embodiments ofFIGS. 2 and 4 , the pressure-sensitive adhesive 3 and thetransfer tape 4 are well protected by the flap during the shelf life of theflowpack 1. - In order to further increase the size of the reclosed package, the pressure-sensitive adhesive can be located on the upper-
end portion 5 of the foldedfilm 6, as represented inFIG. 6 . This position ensures the possibility of having the largest possiblereclosed flowpack 1, but thetransfer tape 4 and the pressure-sensitive adhesive are less protected during the shelf life of theflowpack 1. - Typical structures for flowpack films/sheets suitable for the invention are:
-
- heat seal lacquer/PET/print layer/PE,
- OPP/print layer/PE,
- OPP/print layer/OPP,
- print layer/OPP/metalized-OPP/seal layer,
- print layer/OPP/seal layer.
- Pressure-sensitive adhesives (permanent tacky adhesives) usually have compositions based on natural and/or synthetic rubber, optionally used in combination with modified cellophanes, phenolformaldehyde resins or waxes. In addition to rubbers, polymers based on styrene, (meth)acrylic acid or vinyl ether are widely used, alone or as a mixture. Lastly, silicone resins may also be employed. Compositions including mixtures of natural and synthetic rubbers and copolymers of (meth)acrylic acid and styrene are preferred.
- These pressure-sensitive adhesives are deposited onto the substrate (web) at a thickness of approximately 1 to 5 g/m2. Pressure-sensitive adhesive can be applied in the form of a solution or of a dispersion, or even in the molten state. Coating-deposition techniques well known by those skilled in the art may be employed, such as, for example, heliographic or flexographic printing, or offset printing. In this embodiment, the
flap 10 directly adheres to the pressure-sensitive adhesive 3. In an alternative embodiment, the pressure-sensitive adhesive 3 is deposited on atransfer tape 4 slitted in the right dimensions, and then applied to thefilm 6 before or during the manufacturing of theflowpack 1. - Example of suitable commercially available pressure-sensitive adhesives are produced by Henkel under the grade names 22-263, 22-272, 22-392, 22-477, 22-848, 22-861 or produced by Sun Chemical under the grade names S7188, S7883, S7936, S7979, S7985, S8011, S8039, S8041, S8044, S8046, S8057, S8078, S8083, S8093, S8095, S8110, S9044, C1225, S8124, S8129, S8130.
Claims (15)
1. Reclosable flowpack (1) comprising:
a film (6) comprising one or more polymeric layer(s),
a top fold (12), a flap fold (13) and a flap (10), said flap comprising a peelable fin seal (2) joining an upper-end portion (5) and a lower-end portion (8) of said film (6),
two peelable cross seals (7) closing both ends of the flowpack (1),
a pressure-sensitive adhesive (3),
the position of said pressure-sensitive adhesive (3) and said flap (10) allowing, after the flowpack has been opened by peeling the fin seal (2), the reclosing of the flowpack (1) by unfolding the lower-end portion (8) and folding the upper-end portion (5) of the film (6) onto the pressure-sensitive adhesive (3) for forming a lap seal.
2. Reclosable flowpack (1) according to claim 1 , characterised in that the pressure-sensitive adhesive (3) is located on the external surface of the flowpack (1), under the flap (10).
3. Reclosable flowpack (1) according to claim 1 , characterised in that the pressure-sensitive adhesive (3) is protected by a transfer tape (4).
4. Reclosable flowpack (1) according to claim 1 , characterised in that the lengths of the lower-end portion (8) and upper-end portion (5) of the flap (10), and the distance between the top fold (12) and the flap fold (13) are selected so that, when reclosed, said lower-end portion (8) remains unfolded.
5. Reclosable flowpack according to claim 1 , characterised in that the pressure-sensitive adhesive (3) is in contact with the flap fold (13).
6. Reclosable flowpack according to claim 1 , characterised in that the cross seals (7) join the edge of the flap (10) to the external side of the flowpack (1).
7. Reclosable flowpack (1) according to claim 1 , characterised in that the film (6) comprises an oriented polymer layer and an aluminium layer.
8. Reclosable flowpack according claim 1 , characterised in that the opening force of the peelable fin seal according to ASTM D1876 is comprised between 5 and 25 N/15 mm, preferably between 10 and 20 N/15 mm.
9. Reclosable flowpack according to claim 1 , comprising a hanging hole (9) located in one of the cross seals (7).
10. Reclosable flowpack according to claim 1 , characterised in that the length of the upper-end portion (5) is larger than the length of the lower-end portion (8).
11. Reclosable flowpack according to claim 1 , characterised in that the length “z” of the lower-end portion (8) is comprised between 60 percent and 90 percent of the length “x” of the upper-end portion (5).
12. Reclosable flowpack according to claim 9 , characterised in that the upper-end portion (5) of the flap (10) hanging out of the lower-end portion (8) of the flap is peelably sealed on the external surface of the flowpack (1).
13. Reclosable flowpack according to claim 1 , characterised in that the structure of the film (6) is selected from the group consisting of heat seal lacquer/PET/print layer/PE, or OPP/print layer/PE, or OPP/print layer/OPP, or print layer/OPP/metalized-OPP/seal layer and print layer/OPP/seal layer.
14. Reclosable flowpack according to claim 1 , characterised in that after opening and reclose, the flowpack is enlarged by the length of the upper-end portion (8) of the film.
15. Reclosable flowpack according to claim 1 , characterized in that the top fold (12) is spaced apart from the flap fold (13).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12187603.1 | 2012-10-08 | ||
EP12187603 | 2012-10-08 | ||
PCT/EP2013/070530 WO2014056776A1 (en) | 2012-10-08 | 2013-10-02 | Reclosable flowpack |
Publications (1)
Publication Number | Publication Date |
---|---|
US20150274393A1 true US20150274393A1 (en) | 2015-10-01 |
Family
ID=47008393
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/433,823 Abandoned US20150274393A1 (en) | 2012-10-08 | 2013-10-02 | Reclosable Flowpack |
Country Status (3)
Country | Link |
---|---|
US (1) | US20150274393A1 (en) |
EP (1) | EP2903904A1 (en) |
WO (1) | WO2014056776A1 (en) |
Cited By (4)
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US20150030265A1 (en) * | 2012-03-07 | 2015-01-29 | Mondi Halle Gmbh | Side-gusset bag made of a plastic fabric composite, and method for the production thereof |
US20180201425A1 (en) * | 2014-06-05 | 2018-07-19 | Amcor Flexibles Uk Limited | Wipes and tissues packaging |
CN109068727A (en) * | 2016-03-31 | 2018-12-21 | 菲利普莫里斯生产公司 | The bag of extension tabs with cover plate and adherency |
JP7404844B2 (en) | 2019-12-17 | 2023-12-26 | 大日本印刷株式会社 | Paper packaging bag and method for manufacturing paper packaging bag |
Families Citing this family (2)
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DE102016002249A1 (en) | 2016-02-26 | 2017-08-31 | Dmk Deutsches Milchkontor Gmbh | Pillow pack |
EP3917850A1 (en) * | 2019-01-31 | 2021-12-08 | Automated Packaging Systems, LLC. | Reclosable bag and methods of forming and using the same |
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Cited By (6)
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---|---|---|---|---|
US20150030265A1 (en) * | 2012-03-07 | 2015-01-29 | Mondi Halle Gmbh | Side-gusset bag made of a plastic fabric composite, and method for the production thereof |
US9758279B2 (en) * | 2012-03-07 | 2017-09-12 | Mondi Halle Gmbh | Side-gusset bag made of a plastic fabric composite, and method for the production thereof |
US20180201425A1 (en) * | 2014-06-05 | 2018-07-19 | Amcor Flexibles Uk Limited | Wipes and tissues packaging |
CN109068727A (en) * | 2016-03-31 | 2018-12-21 | 菲利普莫里斯生产公司 | The bag of extension tabs with cover plate and adherency |
US20190075844A1 (en) * | 2016-03-31 | 2019-03-14 | Philip Morris Products S.A. | Pouch with cover flap and adhered extension flap |
JP7404844B2 (en) | 2019-12-17 | 2023-12-26 | 大日本印刷株式会社 | Paper packaging bag and method for manufacturing paper packaging bag |
Also Published As
Publication number | Publication date |
---|---|
WO2014056776A1 (en) | 2014-04-17 |
EP2903904A1 (en) | 2015-08-12 |
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Owner name: AMCOR FLEXIBLES, SWITZERLAND Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PILZECKER, JENS;REEL/FRAME:036099/0074 Effective date: 20150402 |
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