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EP2470441B1 - Utilisation d'un rouleau de film oriente biaxialement en polypropylene pour emballer des emballages de cigarettes, et carton de cigarettes - Google Patents

Utilisation d'un rouleau de film oriente biaxialement en polypropylene pour emballer des emballages de cigarettes, et carton de cigarettes Download PDF

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Publication number
EP2470441B1
EP2470441B1 EP10752721.0A EP10752721A EP2470441B1 EP 2470441 B1 EP2470441 B1 EP 2470441B1 EP 10752721 A EP10752721 A EP 10752721A EP 2470441 B1 EP2470441 B1 EP 2470441B1
Authority
EP
European Patent Office
Prior art keywords
film
thin
thin areas
lines
cigarette
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.)
Not-in-force
Application number
EP10752721.0A
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German (de)
English (en)
Other versions
EP2470441A1 (fr
Inventor
Angela Speith-Herfurth
Patrick Stuppi
Leo Wintrich
Jörg STEINBRECHER
Markus Henne
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.)
Treofan Germany GmbH and Co KG
Original Assignee
Treofan Germany GmbH and Co KG
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Filing date
Publication date
Application filed by Treofan Germany GmbH and Co KG filed Critical Treofan Germany GmbH and Co KG
Priority to PL10752721T priority Critical patent/PL2470441T3/pl
Publication of EP2470441A1 publication Critical patent/EP2470441A1/fr
Application granted granted Critical
Publication of EP2470441B1 publication Critical patent/EP2470441B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • B65D75/5827—Tear-lines provided in a wall portion
    • B65D75/5833—Tear-lines provided in a wall portion for tearing out a portion of the wall
    • B65D75/5844—Tear-lines provided in a wall portion for tearing out a portion of the wall the portion of the wall being a narrow strip, e.g. between lines of weakness
    • 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
    • B65D85/07—Containers, packaging elements or packages, specially adapted for particular articles or materials for compressible or flexible articles
    • B65D85/08—Containers, packaging elements or packages, specially adapted for particular articles or materials for compressible or flexible articles rod-shaped or tubular
    • B65D85/10—Containers, packaging elements or packages, specially adapted for particular articles or materials for compressible or flexible articles rod-shaped or tubular for cigarettes
    • 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
    • B65D85/07—Containers, packaging elements or packages, specially adapted for particular articles or materials for compressible or flexible articles
    • B65D85/08—Containers, packaging elements or packages, specially adapted for particular articles or materials for compressible or flexible articles rod-shaped or tubular
    • B65D85/10—Containers, packaging elements or packages, specially adapted for particular articles or materials for compressible or flexible articles rod-shaped or tubular for cigarettes
    • B65D85/1072—Bundle of cigarette packs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/15—Sheet, web, or layer weakened to permit separation through thickness

Definitions

  • the present invention relates to a use of a biaxially oriented film roll according to claim 1 and a cigarette rod according to claim 7.
  • biaxially oriented plastic films particularly thermoplastic polymer films, and especially biaxially oriented polypropylene films
  • the polyolefin film protects the packaged goods against rapid drying or loss of flavor with very low material usage.
  • Uniaxially oriented films show a low tear strength in the direction of orientation and can be easily controlled in this direction and tear further.
  • uniaxially oriented films are not usable in many fields, among other things due to insufficient transverse mechanical strengths.
  • the biaxial orientation on the one hand, produces the desirable high strengths (moduli) in both dimensions; on the other hand, but also the preferred directions are equalized. This has the consequence that for opening a film package (eg biscuit bag) first a high force must be overcome in order to tear the film.
  • a crack will be planted even when using very low tensile forces uncontrollably continued.
  • This uncontrolled tear propagation behavior is particularly problematic in biaxially oriented polypropylene films, since the tear propagation resistance is particularly weak in this material. This problem is particularly troublesome for packages with general cargo, which is not loose, but packaged orderly, such as cigarette rods, Weetabix, crispbread, biscuit rolls and the like. These types of packaging are particularly designed to ensure that the consumer initially only picks individual pieces and wants to store the remainder of the package in order to remove more units at a later date. For this application, the uncontrolled tear propagation of the film packaging is particularly annoying for the consumer.
  • the WO 98/2312 describes packages that are pre-cut by a laser beam. These packages have a multilayer structure. In particular, a metallic intermediate layer is provided which is intended to prevent the laser beam from cutting through the film. This packaging is lavish and expensive due to the lamination with a metal layer. About the exact configuration of the packaging is disclosed in the description nothing.
  • the perforated film must have sufficient mechanical stability so that the perforated film can be used to package the piece goods.
  • the perforation is integrated as a processing step in the packing process. This solution avoids any mechanical stresses on the perforated film, e.g. when winding and unwinding.
  • the integration of the perforation is not possible in all packaging processes. Firstly, the spatial conditions in existing systems are often designed so that there is simply no room to grow such a device. Furthermore, the packaging processes in the cigarette industry are running at very high speeds, which may be too fast for the perforation. Therefore, it is not always possible to incorporate a device for perforating the foil into a device for bar wrapping cigarette packets. A sufficient mechanical stability of the film is contrary to the same desire for an easy-open packaging.
  • the EP1764313 discloses the use of a biaxially oriented polypropylene film as a packaging material for repackaging packed articles.
  • the packaging material has two thin lines which are arranged parallel and offset from one another. However, the thin spots are shorter than the distances between the thin spots.
  • JP2006-276515 describes an axially oriented shrink film Polypropylene with at least two thin-line lines, which run parallel to each other.
  • the shrink film is used as a sleeve for cylindrical vessels and shrunk onto the vessel for this purpose.
  • the parallel thin lines form a kind of tear tape over which the sleeve can be torn open and separated from the vessel.
  • WO03072455 describes a method of wrapping an article using a wrapping film having at least one tear line. It will be described in detail how the film is cut and processed to produce a sealed package with a specially designed strip. The package can then be opened simply by pulling the free end of the strip to initiate tearing along the tear line.
  • DE102006013280 discloses a cigarette rod and the use of a polypropylene shrinkable film for packaging cuboid cigarette packets.
  • the object of the present invention was to provide an improved package for ordered cargo available.
  • the object underlying the invention is achieved by the use of a biaxially oriented film roll of polypropylene according to claim 1.
  • the two parallel, staggered thin-point lines form a predetermined breaking point in the film, in which a crack propagates very controlled after tearing.
  • the tear continues to run after tearing along one of the thin-line or between the two parallel thin-line lines controlled.
  • the foil packaging is opened only as far as desired.
  • the packaging according to the invention is particularly suitable for ordered or stacked piece goods, e.g. Cigarette packet, suitable. It is possible for the consumer to tear the film along a predetermined predetermined breaking point in such a way that individual pieces can be removed without further units falling out uncontrollably in the case of piece goods.
  • the individual segments between the parallel thin-line lines are adapted according to the size of the unit to be removed. This can be used to control whether one or more units can be conveniently removed by opening.
  • the thin-line lines can be applied to the film web in a suitable pattern.
  • the lines are straight.
  • thin locations are understood as meaning thin areas in which no continuous hole is produced in the film, but the film only becomes thinner at the corresponding points due to removal of material, for example by a laser beam which only penetrates to a predetermined depth.
  • 10 to 80% of the original film thickness preferably 20 to 60% of the original film thickness in the region of the thin location remain. In this way, a closed package is obtained, which continues to meet all hygienic requirements and their barrier properties are not impaired.
  • thin sections B are followed by undamaged sections of film whose length A is determined by the distance of the thin places. Distances are for the purposes of the present invention thus the areas of undamaged film, ranging from the end of a thin spot to the beginning of the subsequent thin spot in the same thin line.
  • the geometric shape of the thin site may vary and depends on the thin point method.
  • laser or ultrasound is preferred. Needle perforations create circular or ellipsoidal or propeller-like shapes that result from the needle and foil contacting each other at the perforation and moving relative to each other. Knives produce more rectangular or diamond-shaped thin spots. Laser and ultrasound methods allow different geometric shapes. Except for circular thin spots, all thin spots have a greater extension in one of the two fundamental directions (longitudinal direction) aligned along the thin line.
  • the thinnings have in the longitudinal direction generally a length B of 0.1 to 8 mm, preferably 0.3 to 6 mm, in particular 0.5 to 3 mm.
  • the extent of the thin point transversely to this longitudinal direction is correspondingly smaller and is generally 5 to 80%, preferably 10 to 50% of its extension in the longitudinal direction. This does not apply to circular thin areas.
  • Circular and approximately circular thin bodies have a diameter of 0.1-6 mm, preferably 0.3 to 5 mm, in which case the diameter corresponds to the length of the thin body B.
  • the length A of the sections, i. the undamaged film between the thin points is 0.05 to ⁇ 8mm, preferably 1 to 6mm.
  • distances of> 4 to 10 mm are preferred.
  • the dimensions of the distances A are selected in relation to the length B of the thin spot so that this length B of the thin sites are at least as large or larger than the distances A.
  • the length or diameter of a thin spot is at least 10% greater than the length of the gaps.
  • the length A of the gaps is 10 to 90% of the length B of the thin spots, preferably 20 to 85%.
  • the dimensions of the distances between the thin spots are generally constant, or vary only slightly within the usual manufacturing accuracy.
  • the size of each thin spot along a line does not or only slightly varies (up to 10%).
  • the diameter of the holes or the length of a thin spot is constant.
  • the thin points and distances of the two parallel thin-line lines of a predetermined breaking point have approximately the same dimensions.
  • an intended breaking point is formed from two thin lines running in parallel, which are arranged at a distance C of not more than 10 mm.
  • the distance C of these two lines is preferably 0.5 to 8 mm, in particular 0.8 to 5 mm
  • the second essential feature of the predetermined breaking point according to the invention is the arrangement of the thin places of the two parallel thin-layer lines to each other. It has been found that staggered placement of the thin spots of the two lines improves the control of crack propagation surprisingly. In this staggered arrangement, a thin spot of the second line does not start at the same height as the opposite thin spot of the first line. As a result, the thin point of the second line at least partially covers the distance of the first thin-line line. In preferred embodiments, especially those in which the thin spots are larger than the spacings, the sections of the one thin line are completely covered by the thin spots of the opposite lines.
  • the center of the sections of the first thin line is aligned with the center of the respective opposite thin points of the second thin line, so that a symmetrical Thin-point pattern arises.
  • the arrangement of two parallel, staggered thin-line lines significantly improves the control of the crack profile.
  • the invention also makes it possible to break off the packaging at the predetermined breaking point over the edges of the piece goods if the piece goods have a corresponding mechanical stability and the piece goods in the package is arranged so that its edge extends at the level of the double line.
  • the thin-line lines are generally applied in the machine direction of the film. This can be combined simultaneously with the cutting of the film to narrower film widths and thus be carried out in one operation. Alternatively, this can also be done before or after cutting to the finished film width.
  • the film can for example be guided over rollers with suitable tools, for example, these rollers are equipped with knife blades. When using laser or ultrasound to create the thin sites, corresponding tools are positioned below or above the film web. In these processes, the film is unwound from a roll, the thin spots according to the invention are applied, and the thinned film is subsequently rewound and the roll used at the general cargo packaging facilities, ie unwound and used for wrapping the goods.
  • the thin areas do not impair the winding behavior of the film or only insignificantly, so that the thin film provided with the usual devices can be wound up and unwound. It has also been found, surprisingly, that the thin areas according to the invention do not impair the mechanical stability of the film in such a way that the film breaks, film tears, thick places or thinnings arise during winding and unwinding.
  • the roll of thinned film is used to make the package of the present invention.
  • the packaging according to the invention is particularly suitable for ordered or stacked piece goods. It is possible for the consumer to tear the film along a predetermined predetermined breaking point in such a way that individual pieces can be removed without other uncontrolled fall out in the case of general cargo.
  • the individual segments are adapted according to the size of the unit to be removed. This can be used to control whether one or more units can be conveniently removed after opening.
  • the film used is generally a biaxially oriented film of polypropylene.
  • the film can be a translucent to transparent or an opaque film.
  • "opaque film” means an opaque film whose light transmittance (ASTM-D 1003-77) is at most 70%, preferably at most 50%.
  • the film can basically be constructed as a single layer or as a multilayer.
  • laminates which are preferably constructed from the films described herein.
  • the formulation of the film and the type of laser can be coordinated so that the laser beam in the field of thinning leaves a white or colored line.
  • the package later has a recognizable mark and indicates to the consumer where the crack to open the package to allow convenient handling.
  • thermoplastics for the film are polyolefins of olefinic monomers having 2 to 8 carbon atoms.
  • Propylene polymers, ethylene polymers, butylene polymers, cycloolefin polymers or copolymers of propylene, ethylene, butylene units or cycloolefins are particularly suitable.
  • the layers of the film, or the layer for single-layer embodiments at least 50 wt .-%, preferably 70 to 99 wt .-%, in particular 90 to 98 wt .-%, of the thermoplastic polymer, each by weight the layer.
  • propylene polymers are preferred. These propylene polymers contain 90 to 100 wt .-%, preferably 95 to 100 wt .-%, in particular 98 to 100 wt .-%, of propylene and has a melting point of 120 ° C or higher, preferably 130 to 170 ° C, and im in general, a melt flow index of 0.5 g / 10 min to 15 g / 10 min, preferably 2 g / 10 min to 10 g / 10 min, at 230 ° C and a force of 21.6 N (DIN 53 735).
  • Isotactic propylene homopolymer having an atactic content of 15% by weight and less copolymers of ethylene and propylene having an ethylene content of 10% by weight or less, copolymers of propylene with C 4 -C 8 olefins having an olefin content of 10% by weight. % or less, terpolymers of propylene, ethylene and butylene having an ethylene content of 10% by weight or less and having a butylene content of 15% by weight or less are preferred propylene polymers for the core layer, with isotactic propylene homopolymer being particularly preferred.
  • the stated percentages by weight relate to the respective polymer.
  • Suitable other polyolefins in the polymer blend are polyethylenes, especially HDPE, LDPE, VLDPE and LLDPE, wherein the proportion of these polyolefins each 15 wt .-%, based on the polymer mixture, does not exceed.
  • a layer, preferably the base layer or an intermediate layer, of the film for opaque embodiments may additionally contain pigments and / or vacuole-initiating particles in customary amounts.
  • the film of the invention may be single-layered, preferably the film is multi-layered.
  • one or both sides of the intermediate layer and / or cover layers may be applied to the base layer.
  • multi-layered embodiments of the film in addition to the base layer, optionally intermediate layers and outer layers.
  • These additional cover layers and / or intermediate layers are generally composed of polyolefins. They contain at least 70 wt .-%, preferably 75 to 100 wt .-%, in particular 90 to 98 wt .-%, of a polyolefins. As polyolefins for these additional layers are basically the same polymers as described above for the base layer.
  • cover layers are Copolymer of Ethylene and propylene or Ethylene and butylene or Propylene and butylene or Ethylene and another olefin having 5 to 10 carbon atoms or Propylene and another olefin having 5 to 10 carbon atoms or a terpolymer of Ethylene and propylene and butylene or Ethylene and propylene and another olefin having 5 to 10 carbon atoms or a mixture or blends of two or more of said homo-, co- and terpolymers suitable.
  • ethylene-propylene random copolymers with an ethylene content of 2 to 10 wt .-%, preferably 5 to 8 wt .-%, or random propylene-butylene-1 copolymers with a butylene content of 4 to 25 wt .-%, preferably 10 to 20 wt .-%, each based on the total weight of the copolymer, or ethylene-propylene-butylene-1-terpolymers with an ethylene content of 1 to 10 wt .-%, preferably 2 to 6 wt .-%, and a butylene-1 content of 3 to 20 wt .-%, preferably 8 to 10 wt .-%, each based on the total weight of the terpolymer, or a blend of an ethylene-propylene-butylene-1 terpolymer and a propylene-butylene-1 copolymer with an ethylene content of 0.1 to 7% by weight and a propylene content
  • the co- or terpolymers described above generally have a melt flow index of from 1.5 to 30 g / 10 min, preferably from 3 to 15 g / 10 min.
  • the melting point is in the range of 120 to 140 ° C.
  • the blend of copolymers and terpolymers described above has a melt flow index of 5 to 9 g / 10 min and a melting point of 120 to 150 ° C. All above-mentioned Schmelzflußindices are measured at 230 ° C and a force of 21.6 N (DIN 53 735).
  • Layers of co- and / or terpolymers preferably form the outer layers of sealable embodiments of the film.
  • the total thickness of the film can vary within wide limits and depends on the intended use.
  • the preferred embodiments of the film have total thicknesses of 5 to 250 microns, with 10 to 100 .mu.m, in particular 20 to 80 microns, are preferred.
  • the base layer is the layer which makes up more than 50% of the total thickness of the film. Their thickness results from the difference between the total thickness and the thickness of the applied cover and intermediate layer (s) and can therefore vary within wide limits analogously to the total thickness.
  • Cover layers form the outermost layer of the film and are 0.5 to 5 microns, preferably 1 to 3 microns.
  • the intermediate layer is between 1 and 20 microns, preferably 1 to 10 microns.
  • both the base layer and the intermediate layer (s) and the topcoat (s) may contain additives in an effective amount, preferably hydrocarbon resin and / or antistatics and / or antiblocking agents and / or lubricants and / or or stabilizers and / or neutralizing agents which are compatible with the polymers of the core layer and the top layer (s), with the exception of the generally incompatible antiblocking agents.
  • the films are produced by the extrusion process known per se.
  • the melts corresponding to the individual layers of the film are extruded through a flat die.
  • the film thus obtained is stripped to solidify on one or more roll (s) and cooled.
  • the temperature of the take-off roll or rollers is 10 to 90 ° C, preferably 20 to 60 ° C.
  • the biaxial stretching can be carried out simultaneously or sequentially, with the successive biaxial stretching in which stretching is first longitudinal (in the machine direction) and then transverse (perpendicular to the machine direction) is particularly favorable.
  • In the longitudinal direction is preferably 3: 1 to 7: 1 and at a temperature of less than 140 ° C, preferably in the range of 125 to 135 ° C stretched.
  • In the transverse direction is preferably 5: 1 to 12: 1, at a temperature of greater than 140 ° C, preferably at 145 to 160 ° C, stretched.
  • the longitudinal stretching will be carried out expediently with the help of two different speeds corresponding to the desired stretching ratio and the transverse stretching with the aid of a corresponding clip frame.
  • biaxial stretching can also be carried out simultaneously in the longitudinal transverse direction. These simultaneous stretching methods are known per se in the prior art.
  • the film is finally held at a temperature of 110 to 150 ° C for about 0.5 to 10 seconds.
  • one or both surfaces of the film may be corona or flame treated by one of the known methods.
  • the film may be laminated, coated, melt-coated, painted or laminated by further processing steps to provide the film with further advantageous properties.
  • laminates composites of polypropylene films and polyethylene films are particularly preferred. Such composites can be produced by lamination of the individual films.
  • Another technically advantageous variant for the production of PP / PE laminates is the extrusion coating of a suitable polyethylene onto a biaxially oriented polypropylene film. Such extrusion coatings are known per se in the prior art. It has been found that laminates of PP / PE films are advantageous in the treatment by laser beam and are less likely to be perforated by mistake.
  • the packaging is characterized by a controllable tear behavior.
  • the force required to initiate a tear at the foil edge can be reduced by a notch, preferably V-shaped.
  • the packaging is much easier and more controlled to continue.
  • conventional film packaging also have, such as high mechanical strength, water and oxygen barrier, good optical properties.
  • the packaging is particularly advantageous for use with piece goods, especially for stacked units, such as e.g. Biscuits, packets of cigarettes or pressed food moldings.
  • the foil with the perforation enables a novel packaging solution for cigarette rods.
  • the packets of cigarettes are stacked and wrapped in the film with the perforation according to the invention. These cigarette rods can then be opened at the predetermined breaking point by breaking along the perforation line.
  • a transparent three-layer ABA film with a symmetrical structure with a total thickness of 20 ⁇ m was produced by coextrusion and subsequent stepwise orientation in the longitudinal and transverse directions.
  • the cover layers had a thickness of 0.6 ⁇ m in each case.
  • a top layers :
  • the film was then coated on a surface with a sealable acrylate coating.
  • the film was then cut to 350mm width into narrow cuts and wound up. These narrow cuts (rolls) were passed in a second step on a needled rollers and provided in the longitudinal direction of the film with perforation lines, which were arranged in parallel at a distance of 6mm.
  • the perforation had a propeller-like shape with a length B of 4 mm. The distances between the individual perforations was 2mm.
  • the thus perforated film was wound up into a roll of perforated film.
  • the perforated film was then used for a bar wrap with 12 cigarette sachets.
  • the packets were arranged so that the edges of the packets were at the level of the perforation line.
  • the packets could be removed by breaking along the perforation line, without causing uncontrolled crack propagation in the film.
  • a single-row perforation was applied to the film described in Example 1 with a similar needle roller.
  • the perforations were the same length and spacing as in Example 1.
  • the film was used in the same way for the bar wrap of 12 cigarette sachets.
  • the packaging could not be opened by breaking. When attempting to tear the film along the perforation line, 3 out of 10 attempts led to an uncontrolled tear along the perforation line.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wrappers (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Laminated Bodies (AREA)
  • Packages (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Claims (7)

  1. Utilisation d'un rouleau de feuille biaxialement orientée, laquelle est en polypropylène et comporte des alignements de parties à épaisseur réduite, pour emballer des paquets de cigarettes en forme de parallélépipède, caractérisée en ce que ladite feuille comporte au moins deux alignements de parties à épaisseur réduite lesquels s'étendent parallèlement l'un à l'autre et sont espacés d'une distance (C) inférieure ou égale à 10 mm, les parties à épaisseur réduite (1) des deux alignements étant disposés en quinconce, les parties à épaisseur réduite (1) étant interrompues par des zones intermédiaires (2) constituées de feuille non-altérée, et les parties à épaisseur réduite (1) ayant une longueur supérieure ou égale aux zones intermédiaires (2) entre les parties à épaisseur réduite (1), et l'épaisseur des parties à épaisseur réduite (1) correspondant à 10 à 80 % de celle du reste de la feuille.
  2. Utilisation d'un rouleau de feuille en polypropylène selon la revendication 1, caractérisée en ce que les parties à épaisseur réduite (1) sont réalisées par enlèvement de matière au faisceau laser ou par ultra-sons.
  3. Utilisation d'un rouleau de feuille en polypropylène selon la revendication 1, caractérisée en ce que les parties à épaisseur réduite (1) sont réalisées au couteau et ont la forme d'un losange ou d'un rectangle.
  4. Utilisation d'un rouleau de feuille en polypropylène selon la revendication 1, caractérisée en ce que parties à épaisseur réduite (1) ont une longueur comprise entre 0,1 et 8 mm.
  5. Utilisation d'un rouleau de feuille en polypropylène selon la revendication 1, caractérisée en ce que la longueur des zones intermédiaire (A) entre les parties à épaisseur réduite (1) correspond à 10 à 95 % de la longueur (B) des parties à épaisseur réduite (1).
  6. Utilisation d'un rouleau de feuille en polypropylène selon la revendication 1, caractérisée en ce que le milieu de chacune des zones du premier alignement de parties à épaisseur réduite se trouve sur une même ligne que le milieu de la partie à épaisseur réduite correspondante du deuxième alignement de parties à épaisseur réduite.
  7. Cartouche de cigarettes qui est destinée à emballer des paquets de cigarettes en forme de parallélépipède et qui comprend une feuille biaxialement orientée en polypropylène, caractérisée en ce que ladite feuille comporte au moins deux alignements de parties à épaisseur réduite lesquels s'étendent parallèlement l'un à l'autre et sont espacés d'une distance (C) inférieure ou égale à 10 mm, les parties à épaisseur réduite (1) des deux alignements étant disposés en quinconce, les parties à épaisseur réduite (1) étant interrompues par des zones intermédiaires (2) constituées de feuille non-altérée, et les parties à épaisseur réduite (1) ayant une longueur supérieure ou égale aux zones intermédiaires (2) entre les parties à épaisseur réduite (1), l'épaisseur des parties à épaisseur réduite correspondant à 10 à 80 % de celle du reste de la feuille, et ladite cartouche de cigarettes étant fabriquée en mettant en oeuvre l'utilisation selon l'une des revendications 1 à 6.
EP10752721.0A 2009-08-28 2010-08-26 Utilisation d'un rouleau de film oriente biaxialement en polypropylene pour emballer des emballages de cigarettes, et carton de cigarettes Not-in-force EP2470441B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10752721T PL2470441T3 (pl) 2009-08-28 2010-08-26 Zastosowanie dwuosiowo orientowanej rolki folii z polipropylenu do opakowania paczek papierosów i zestaw papierosów

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009039221 2009-08-28
PCT/EP2010/005223 WO2011023385A1 (fr) 2009-08-28 2010-08-26 Film de polypropylène a ouverture facilitée

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EP2470441A1 EP2470441A1 (fr) 2012-07-04
EP2470441B1 true EP2470441B1 (fr) 2018-10-10

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Country Status (15)

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US (1) US20120152773A1 (fr)
EP (1) EP2470441B1 (fr)
JP (1) JP2013503080A (fr)
KR (1) KR20120059519A (fr)
CN (1) CN102498047B (fr)
AU (1) AU2010288875B2 (fr)
BR (1) BR112012004390A2 (fr)
CA (1) CA2771912A1 (fr)
DE (1) DE202010018143U1 (fr)
EA (1) EA023195B1 (fr)
MX (1) MX2012002474A (fr)
PL (1) PL2470441T3 (fr)
UA (1) UA115860C2 (fr)
WO (1) WO2011023385A1 (fr)
ZA (1) ZA201201384B (fr)

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FR3014729B1 (fr) 2013-12-12 2016-08-26 Francois Gosset Procede de realisation d'une ligne de moindre resistance sur un film plastique
PL3186162T3 (pl) 2014-08-26 2019-05-31 Jt Int Sa Folia opakowaniowa i sposób jej wytwarzania
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KR20120059519A (ko) 2012-06-08
AU2010288875A1 (en) 2012-03-29
EA023195B1 (ru) 2016-05-31
WO2011023385A1 (fr) 2011-03-03
DE202010018143U1 (de) 2014-06-04
CA2771912A1 (fr) 2011-03-03
MX2012002474A (es) 2012-03-26
PL2470441T3 (pl) 2019-05-31
AU2010288875B2 (en) 2014-07-17
CN102498047B (zh) 2015-07-29
ZA201201384B (en) 2012-10-31
UA115860C2 (uk) 2018-01-10
CN102498047A (zh) 2012-06-13
BR112012004390A2 (pt) 2016-03-22
US20120152773A1 (en) 2012-06-21
EP2470441A1 (fr) 2012-07-04
EA201270329A1 (ru) 2012-08-30
JP2013503080A (ja) 2013-01-31

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