EP2730515B1 - Schrumpfverpackung sowie vorrichtung und verfahren zur herstellung derselben - Google Patents

Schrumpfverpackung sowie vorrichtung und verfahren zur herstellung derselben Download PDF

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Publication number
EP2730515B1
EP2730515B1 EP13191541.5A EP13191541A EP2730515B1 EP 2730515 B1 EP2730515 B1 EP 2730515B1 EP 13191541 A EP13191541 A EP 13191541A EP 2730515 B1 EP2730515 B1 EP 2730515B1
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EP
European Patent Office
Prior art keywords
shrink
film
area
shrink film
wrap package
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Active
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EP13191541.5A
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German (de)
English (en)
French (fr)
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EP2730515A1 (de
Inventor
Christian Napravnik
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Krones AG
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Krones AG
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    • 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
    • B65D71/00—Bundles of articles held together by packaging elements for convenience of storage or transport, e.g. portable segregating carrier for plural receptacles such as beer cans or pop bottles; Bales of material
    • B65D71/06—Packaging elements holding or encircling completely or almost completely the bundle of articles, e.g. wrappers
    • B65D71/08—Wrappers shrunk by heat or under tension, e.g. stretch films or films tensioned by compressed articles
    • 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
    • B65D75/002—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 in shrink films

Definitions

  • the present invention relates to a shrink wrap, an apparatus for producing a shrink wrap and a method for producing a shrink wrap according to the features of the preambles of claims 1, 7 and 11.
  • Heat shrink films may be uniaxial or biaxially oriented depending on the manufacturing process and must have a variety of film properties.
  • shrink-wrap packages are also used to package articles such as a plurality of containers or bottles.
  • the shrink film is beaten into transport about the article or article assembly by means of a wrapping device and then shrunk around the article or article assembly by supplying hot shrink agent.
  • polyethylene films or films of a comparatively suitable plastic material are usually provided as continuous material on rolls.
  • the shrinkage properties of the films used are usually the same in each area. When heat is applied, the shrinkage behavior of the film should therefore be equally pronounced in all areas of the outer packaging.
  • the shrinkage behavior of the film is also influenced by the articles to be packaged. For example, if the articles are bottles filled with drinks, the bottle contents will affect the shrinkage behavior of the shrink film. For this reason, it is advantageous if adjacent areas of the shrink film have different properties. For example, it is advantageous if the area of the neck of the bottle exhibits a different shrinking behavior than the area which bears against the jacket surface of the bottles and is cooled by the bottle or its contents. Furthermore, the area of the shrink film which adjoins a jacket surface without cooling content must again have different shrinkage properties.
  • areas can be problematic in which the film does not rest against the bottle before shrinking, for example, the area of the upper neck of the bottle.
  • This critical neck area is located between the area of the bottle cap and the upper shell area of the bottle with an increased cross-sectional diameter, but especially between the closure edge and the bottle.
  • the shrink wrap is directed over one edge and can not equalize with the trailing edge area of the shrink wrap during shrinkage, i. e.g. Tighten material.
  • shrinking initially shrinkage is introduced in particular laterally in the film overlap, so that the film eye forms and further increased due to the shrinkage properties of the shrink film. This leads to a heavy stress on the shrink film in the area of the deflection in the bottle cap.
  • the shrink film on the front-side side surfaces is at least largely firmly against the articles even before shrinking.
  • the shrink film due to oppositely directed tensile forces in this upper cladding region, the shrink film generally shrinks to a lesser extent than would match its properties. Instead, shrinking forces educated.
  • shrinkage initiation temperature the bonds between the molecular dressings stretched in the blown extrusion are degraded.
  • the molecular assemblies try to regain their original position and extent in the material. If this movement is blocked, it is only necessary to build up the so-called heat shrinkage forces. These are necessary to give the package its stability.
  • the shrink film In the neck area, where the shrink film is not applied to the bottle, it shrinks according to their properties. In these transition areas, it can thus easily come to tearing the packaging.
  • EP0314086 A2 a shrink wrap made of plastic material that shrinks when exposed to heat. This has at least one opening for slipping over the goods to be packaged. In the region adjoining the opening or in at least one of the regions adjoining the openings, the shrink wrap is formed in multiple layers, whereby this region is additionally reinforced.
  • a generic shrink wrap is from the US 4779731 known.
  • a generic device is from the EP-A-2495178 known.
  • the aim of the present invention is therefore to produce a shrink wrap having an improved visual appearance.
  • Another object of the invention may provide to improve the stability of the shrink wrap at least partially.
  • the shrink film has to travel different paths in different areas in order to generate a good, uniform shrinkage result.
  • the shrink wrap should ideally have different shrink properties than where the shrink wrap spans the gap between two bottles without touching them.
  • Another critical area is where the shrink film runs over the caps of the bottles.
  • the shrink film is stretched the most by the deflection and possibly additionally burdened by sharp edges, for example crown caps.
  • the shrink film should have other shrinkage properties or a different strength than, for example, at the end faces or on the side surfaces with the so-called film eyes.
  • the invention thus relates to a shrink wrap for packaging an article or article composition, in particular for the packaging of bottles.
  • the shrink wrap has a shell formed from shrink wrap.
  • the shrink wrap is wrapped around itself around the article or article assembly so that a film overlap is formed in the bottom region of the shrink wrap.
  • the respective end regions are firmly connected or welded together by the shrinkage.
  • the shrink wrap according to the invention has at least partially, preferably in mechanically stressed areas, increased stability.
  • the invention proposes the use of a shrink film, which has at least partially a coating.
  • the coating is applied in each case to a region of the shrink film that corresponds to a region with increased mechanical stress of the shrink wrap or is adjacent to a region with increased mechanical stress.
  • such a coating may also be used to coat areas of the shrink wrap corresponding to areas of shrink wrap where the shrinkage behavior of the shrink wrap due to contact with the article being packaged deviates from the original shrink properties of the shrink wrap.
  • This makes it possible to target To define areas of the shrink film, which have a different, especially a reduced shrinkage behavior.
  • a targeted shrinkage behavior of the shrink wrap is possible, in particular known vulnerabilities of such a shrink wrap can be avoided.
  • the shrinkage is inhibited in so-called "warm” areas without contact with the cooling contents of the articles by applying the coating.
  • similar or identical shrinkage properties of the shrink wrap can be set via the so-called “cold” areas with contact to the cooling content of the articles and over the "warm” areas.
  • a logo can be printed on the films, which extends over "cold” and "warm” areas.
  • the shrinkage properties can be locally changed in this area or the shrinkage can be prevented in the entire logo area, so that this is not distorted when shrinking the film.
  • the coating can be used selectively in order to achieve a particularly uniform and wrinkle-free shrinkage result.
  • the shrinking forces cause the shrink film to press between the articles.
  • these large areas are often printed for promotional purposes and should be formed preferably wrinkle-free for aesthetic reasons.
  • the shrink film is coated with a non-visible varnish.
  • a resin or another coating with comparable properties can also be used.
  • the coating for example the coating which is not visible or at least largely invisible, acts in a shrinkage-inhibiting manner in the corresponding coating area. If the partially coated shrink film is now subjected to shrinkage agent, it does not shrink or only slightly shrink in the coated area.
  • a coating for example, paints are suitable, due to their Resistance to a shrink force of about 500 to 2000mN / cm 2 resist, whereby the shrinkage force or the shrinkage of the shrink film can be locally influenced.
  • the shrink film can be reinforced at particularly stressed areas of a container.
  • areas with perforations for facilitated opening of the shrink wrap are at least partially coated.
  • neck area of bottles i. the area of shrink wrap between an upper closure of a shrink wrapped article and an upper region of a shell side surface of the wrapped article; Area of the upper closure of the article, in the shrink wrap of the shrink wrap u.U. guided around sharp edges; Area of the so-called foil eye of the shrink wrap; Areas of the top of the shrink wrap between two articles; Printed image on the side surfaces without foil eye; Areas of the bottom side of the shrink wrap, especially for articles with star-shaped contact surfaces, areas where a carrying handle to be attached, etc.
  • a lacquer is used for the coating, which does not change the shrinkage behavior of the shrink film during shrinkage, but hardens upon activation. This strengthens the shrink film in this area.
  • a varnish is used, for example, to coat the shrink film at least in a region corresponding to an area of increased mechanical stress of the shrink wrap after the shrinking operation.
  • the lacquer is activated by activation, for example by irradiation with UV or the like. - Hardened and thus reinforced the corresponding area of shrink wrapping.
  • This type of coating is useful, for example, for areas where a carrying handle is to be attached.
  • the above-mentioned perforation are according to the invention simply reinforced in this way, without hindering easy separation of the perforation.
  • a further aspect of the invention provides that a reduced shrinkage behavior of the shrink film in the corresponding area can be set by the coating in a targeted manner.
  • the paint is at least partially in shape a regular pattern is applied to the shrink film, whereby the shrinkage rate of the shrink film in the region is reduced to a defined extent and / or whereby the shrinkage of the shrink film in at least one shrinkage direction in the region is reduced to a defined extent.
  • the shrinkage rate between zero and the maximum possible shrinkage rate of the shrink film can be set by the printing of patterns even with a paint coating.
  • the direction of the path of the shrink film during the shrinking process can be selectively influenced.
  • conventional packaging devices can be used, which are suitable for wrapping articles or article compositions with a shrink film and shrinking these onto the article or article composition.
  • a pre-fabricated by the manufacturer shrink film is used, which already has the at least one desired regional coating.
  • a prefabricated shrink film is used with a coating with a non-visible lacquer.
  • the shrink film is conventionally provided on a roll and cut to length in the desired film length during the packaging process. The roll material must therefore have the corresponding coatings at regular intervals, each corresponding to a length of film section.
  • the roll when a product is changed, the roll usually also needs to be replaced with the prefabricated shrink film, since a new shrink wrap usually has other weak points in another article composition. Or the respective weak points of the shrink wrap are due to the other bottle or container geometry at each other points of the film section length.
  • the invention further provides an apparatus for producing a shrink wrapping comprising at least one article or article compilation.
  • the article or the pre-grouped article assembly are transported on a horizontal conveyor to a shrinking station.
  • a film wrapping device with shrink film in particular they are wrapped in a film blank of defined length.
  • the film transport and -zu slaughter is associated with a coating device, can be applied by the at least partially a coating with a non-visible paint on the shrink film.
  • the coating device is a printing device with which the paint is printed on the shrink film.
  • the coating device and / or the film transport and supply device may be assigned a drying unit for drying the coating.
  • the device comprises a control unit and the coating device is controlled by the control unit.
  • the coating applied to the shrink film by the coating device can be controlled and / or changed via the control unit.
  • the film wrapping device may comprise at least one first sensory detection unit and / or the shrinking station may comprise at least one second sensory detection unit.
  • the respectively determined data are transmitted to the control unit. This compares the measured actual values with nominal values and optionally adjusts the pattern to coated areas by controlling the coating device. As a result, product control and product optimization in the current packaging operation is possible, whereby the number of defective products and thus the proportion of inadequate goods can be reduced.
  • the coated subregions can each be printed as full-surface coatings on the shrink film. Furthermore, the printing of so-called coating patterns is possible, for example, coated mini partial areas with uncoated mini partial areas are applied alternately in a regular pattern on the coating area.
  • the invention further relates to a method for producing a shrink wrap for an article or article composition in which the shrink wrap is at least partially reinforced.
  • the regions of the shrink wrapping to be reinforced are added in accordance with a predetermined one packaging article or determined according to a predetermined article composition.
  • the coating is applied to the corresponding area of the shrink film.
  • the coating is, for example, a non-visible lacquer which preferably counteracts the shrinkage of the shrink film and thus at least partially reduces the shrinkage path.
  • the paint can completely prevent shrinkage of the shrink film in the coated area.
  • the shrink wrap around the article or article assembly is then wrapped in itself and shrunk around the article or article composition. The respective end portions of the shrink film are firmly connected.
  • the shrink film does not shrink in the at least one coated area or only to a reduced extent, so that the shrink wrap is reinforced in this area.
  • the varnish does not affect the shrinking of the shrink film but is activated after shrinking and then hardens.
  • the activation is, for example, by irradiation with UV or the like. possible and also leads to the fact that the shrink wrap is reinforced in the corresponding area.
  • the correct positioning of the coated regions of the shrink film with respect to the articles and / or the shrinkage result of the shrink packaging can be monitored by sensors.
  • the positioning of the coating during operation can be corrected or adjusted.
  • the invention thus relates to a shrink wrap, a device for producing a shrink wrap and method for producing a shrink wrap, wherein the properties of the shrink wrap can be adjusted locally by a coating. This ensures an improved enclosure of the envelope surface predetermined by the articles to be packaged. By the local influence of the shrinkage behavior, the appearance of the shrink wrap can thus be optimized and in particular wrinkling in the region of the side surfaces with film eye and / or the end faces can be avoided.
  • the coating provides a substantial improvement to the shrink wrap since, with a shrink wrap having homogeneous properties, not any contour, i. not every article can be enclosed without wrinkles.
  • the coating is intended, in particular, to have different heating time or possible final temperature at cooled and uncooled regions of the articles, i. in areas with or without contact with the contents of the bottles. That Areas that can heat up quickly and unhindered are "obstructed" by the coating as it shrinks. Areas where high stresses occur during shrinkage will cause the film to fail during or after the shrinking process. Such areas are reinforced by the coating according to the invention. Areas that are not heavily stressed during the shrinking process, but during the subsequent handling of the finished packaging unit, are also advantageously reinforced with such a coating.
  • FIG. 1 shows various views of a shrink wrap 1 with possible vulnerabilities according to the prior art.
  • the shrink wrap 1 is formed by wrapping the shrink film 2 around an assembly 100 of four bottles 3 ( Figure 1A ).
  • two opposing side surfaces 4 of the bottle assembly 100 are completely covered with shrink film 2 and referred to as end surfaces 4 *.
  • the other two side surfaces have a so-called film overlap 5.
  • the shrink film 2 is shrunk onto the bottles 3, whereby a compact shrink packaging unit 1 is formed.
  • the so-called film eye 6 forms during shrinking (FIG. Figure 1C).
  • FIG. 1D The shrinkage packaging unit 1 is from above.
  • Particular weaknesses of the shrinkage package 1 are a first region 20 in the neck region 12 of the bottles 3 between the bottle closure 10 and an upper lateral surface region 14, in which the bottles 3 have an elevated bottle cross section (cf. Fig. 1B ). Furthermore, the mechanical stress of the shrink wrap 1 in the region 21 of the deflection of the shrink film 2 on the bottle closure 10 may be increased. Another weak point is the region 22 on the top 7 of the shrink wrap 1 between two bottles 3 (see. Fig. 1C ). The same applies to the area 24 on the bottom side 8 or floor space. In particular, in bottles 3 with a star-shaped bottom 16, the shrink film 2 tends to completely adapt to the shape of the bottle when shrinking. Furthermore, the shrinkage behavior of the shrink film 2 means that it also at least largely adapts to the bottle shape in the region of the side surfaces 4, whereby slightly undesired folds 9 are formed.
  • FIG. 2 shows containers, in particular shrink packaging 1 b, 1 * from different bottles 3, 3 * in an identical 'compilation according to the prior art.
  • the figures make it clear that with different geometries of the bottles 3, 3 *, the shrink film 2 must cover different paths s1 and s2 or s1 * and s2 * during the shrinking process.
  • FIG. 3 shows containers according to the state of Technique, in particular shrink packaging 1,1b, each comprising a different number of bottles 3.
  • a container can summarize any number of bottles. As a rule, between two and forty bottles are combined.
  • the height of the bottles is between 100mm to 500mm at a volume of between 0.1L (liters) to 5.0L (liters).
  • the way the shrink film 2 has to travel during the shrinking process also depends on the number of assembled articles. In particular, this also affects the size of the resulting film eye 6 and 6b.
  • FIG. 4 shows various embodiments of a shrink wrap 30 with different coating areas.
  • the shrink film 2 is at least partially coated with a non-visible or at least largely visible coating 40.
  • FIG. 4A shows for comparison once again the prior art accordingly FIG. 1B ,
  • FIG. 4B In the shrink wrap 30b, at least one region 20 of the shrink wrap 2 is provided with a lacquer coating 40 which is located in the shrink wrap 30b between an upper closure 10 of a shrink wrap 2 enveloped bottle 3 and an upper region of a shell side face 14 of the enveloped bottle 3 equivalent. This serves in particular to avoid contact points between the shrink film 2 and the bottle neck 12. This upper portion 20 is usually above the level of the bottle 3.
  • the hot shrink film 2 during the shrinking process the bottleneck 12 and thereby touching the bottle material in this area.
  • the bottles 3 consist of a thin-walled plastic material, for example PET, and are filled with a carbonated beverage, the material in this region becomes softer and the internal pressure of the gassed bottle contents presses the bottle wall in the area of the bottle neck 12 outwards as a bulge.
  • FIG. 4C shows a coating according to the invention of a region 21, in which the shrink film 2 is guided or deflected around the closure 10 in the region of the upper closure 10 of a shrink-wrapped film 2 bottle 3.
  • the shrink film 2 in the region of the closure 10 is strongly stressed by the initial formation of the film eye 23 to train.
  • the shrink film 2 in the region of the closure during shrinkage can not with the behind the Level the sealing edge of the shrinking film 2, ie tighten the material.
  • the shrink film 2 is pulled at the closure edge against the locally prevailing shrinkage force and thus thinner.
  • the shrinkage path of the shrink film 2 in the region 21 is reduced by the varnish 40, so that the shrink film 2 is tensioned to a lesser extent in this region 21 of the shrink packaging 30c.
  • the coating has a reinforcing effect and reduces the flow of the film from region 21 into the adjacent regions, in particular in the direction of the film eye 23. Because the risk of stretching of the shrink film due to tensile forces Z and thus the risk of formation of cracks is minimized, In this case, one also speaks of a reinforcement of the shrink film 2.
  • the region 22 extends in particular between the empty spaces, which arise because the bottles 3 in the region of their closures 10 have a substantially smaller cross section Q10 (cf. Fig. 4C ) as, for example, in an upper region 14 of the lateral surface.
  • the cross section in an upper region 14 of the lateral surface is denoted by Q14 (cf. Fig. 4C ).
  • shrink wrapping at least on the side surfaces 4 without foil eye on a defined print image.
  • these side surfaces of the shrink wrap are not flat, so that it would be difficult to print them after the packaging process.
  • preprinted shrink films are generally used to make printed shrink wrap.
  • care is taken when printing the shrink film 2 that the effect of the pressure on the shrinkage behavior of the shrink film 2 is as low as possible.
  • it is generally unavoidable that distortion of the printed image will occur during the shrinking process due to the geometry of the bottles 3 and the container assembly.
  • FIG. 4E An in Figure 4E illustrated, at least partially coating the shrink film 2 in the region of the side surfaces of the shrink wrap 30e, in particular with a non-visible or largely invisible paint 40, the shrink film 2 in this area imposes a defined, modified shrinkage behavior can thus help deformation and wrinkling on Print image or wrinkling of the shrink wrap 30e per se in the area of the side surfaces 4 to reduce or avoid.
  • FIG. 4F shows a coating of a shrink film 2 of a container, which comprises a plurality of bottles 3, wherein the substantially cylindrical bottles have 3 star-shaped support surfaces 16.
  • the coating with a lacquer 40 is in this case arranged in the region 24 of the bottom surface 8 of the shrink wrap 30f.
  • the shrinkage of an uncoated shrink film 2 is largely prevented in the region of the star-shaped contact surfaces 16, while in the intermediate regions a shrinkage of the shrink film 2 according to their properties is possible. This leads to a partially increased stress on the shrink film 2 and can lead to unwanted hole formation on the bottom side 8 of the shrink wrap 30f.
  • the at least one region 24 of the shrink film 2 coated with lacquer 40 at least partially corresponds to a region of the bottom surface 8 of the shrink wrap 30f.
  • the at least one region 24 of the shrink film 2 coated with lacquer 40 at least partially corresponds to a region of the bottom surface 8 of the shrink wrap 30f between two bottles 3 of the shrink-wrapped composition or where the at least one area 24 of the shrink film coated with lacquer 40 at least partially corresponds to a region of the bottom surface 8 of the shrink wrap 30f between two contact surfaces of at least one bottle 3.
  • shrink packaging units have a carrying handle which is intended to facilitate the transport of the shrink packaging unit to the user.
  • This consists for example of a band made of plastic, a suitable composite material, etc., which is attached to the shrink packaging unit.
  • the carrying handle is connected at least two places with the shrink wrap, in particular glued or welded.
  • the areas 25 to which the carrying handle is attached are subjected to high mechanical stress when lifting the shrink wrapping unit on the carrying handle.
  • the shrink wrap is usually made of a material that is thinner than the material used for the carrying handle. For example, a 40 ⁇ m PE shrink film is used while the handle is 80 ⁇ m PET.
  • the shrink film in the region of the connection between the shrink wrap and carrying handle breaks and thus the entire shrink wrap is damaged.
  • the directly adjacent region are also coated with a lacquer 40 to protect the transitional edge between shrink wrap and shrink wrap handle assembly.
  • the shrink film 2 is at least partially coated in a region 25 with a lacquer 40, which corresponds to the region of the shrink wrap 30g, to which a carrying handle is attached.
  • the load capacity of the shrink wrap 30g is increased in this area 25 and reduces the risk of tearing out of the handle.
  • the shrink film 2 has at least one prefabricated or introduced during the packaging process perforation 26.
  • a perforation 26 can serve, for example, to remove individual articles more easily from the shrink-wrapping unit.
  • the problem here is that such perforations 26 are deformed during the shrinking process and thus weakened. In particular, an undesired widening of the perforation 26 may occur. In the extreme case, this leads to the shrink-wrapping unit already opening prematurely and unintentionally.
  • An in FIG. 4H shown coating the shrink film 2 in the range of desired perforations 26 with a paint 40 can thus protect these intended film weaknesses. It can be provided that the coating is first applied and then the perforation 26 is introduced. Alternatively, however, it is also conceivable that an already existing perforation 26 is provided with a coating.
  • FIGS. 4B to 4D shown different coated with paint 40 areas 4, 20, 21, 22, 24, 25 and 26 can be combined with each other, in order to achieve an optimal shrinkage result.
  • FIG. 5B shows a shrink wrap 31, in which the entire in FIG. 4 The possibilities of area-wise coating have been combined.
  • a coating of paint 40 which affects the shrinkage behavior in the region of the so-called film eye 23.
  • the incoming composition of bottles 3 are arranged on a first film end of a film section of the shrink film 2 which has already been cut to length or has to be cut to length in the process of wrapping. Subsequently, the film section is turned over to the grouped bottles 3 on itself, so that results in an overlap of the ends of the shrink film 2 on the bottom surface of the folded container.
  • the parallel longitudinal sides of this film section over on two sides over the group of bottles as a so-called film projection on and form during shrinking the so-called film eye 23 of the shrink wrap (see also FIGS.
  • the edge regions of the longitudinal sides of the shrink film section are at least partially coated with a varnish 40 in order to specifically regulate the reduction of the shrinkage in the film overhang or in the area of the end surfaces of the package and thus the size of the resulting film eye 23 *.
  • the coating is chosen so that in addition the position of the film eye 23 * is affected.
  • FIG. 6C additionally shows a coating 40 in a region 23 * which forms the upper edge of the film eye 23.
  • the coating can be applied as a pattern and directly influence the shrinkage behavior in this area 23x of the shrink film 2.
  • the coating can be UV-curing and only then irradiated in a rear region of the shrinking device by a UV device and thus cured.
  • the UV coating in the area 23x can only be cured after the shrinking process. In this case, the finished container passes through a UV device following the shrinking device, so that the coating cures in the region 23x and results in the desired increased stability in the upper region 23x of the film eye 23.
  • FIG. 7 shows a device 50 for producing a shrink wrap 30, 31 according to the invention according to the FIGS. 4B to 4H . 5B and 6B .
  • the article or the pre-grouped article compilation 100 are transported on a horizontal conveyor 52 in the transport direction (TR) to a shrinking station 54.
  • a film wrapping device 56 with shrink film 2, in particular, they are thereby wrapped in a film blank of defined length.
  • the film wrapping device 56 comprises a film feed device 58 for conveying the shrink film 2. These may be already cut to length film sections. Alternatively, the film feeder 56 may be associated with a cutter 59.
  • the shrink film 2 is taken for example from an endless supply 2 * and cut by the cutting device 59 in the required length.
  • the film transporting and feeding device 58 is assigned a coating device 60, by means of which a coating with a non-visible or at least largely non-visible lacquer can be applied to the shrink film 2 at least in regions.
  • the coating device 60 is a printing device with which the paint is printed on the shrink film 2.
  • the applied coating Before the at least partially coated shrink film 2b can be processed in the film wrapping device 56, the applied coating must dry. This happens automatically, for example, due to the distance to be traveled within the device 50.
  • the coating device 60 or the film transport and supply device 58 is assigned a drying unit 62.
  • the coating may be a lacquer which dries quickly under UV or IR light.
  • the coating device 60 would be associated with a drying unit 52 having a UV or an IR irradiation unit.
  • an air stream or similar. be provided, which supports the drying process. This is particularly necessary to prevent the packaging process from being delayed by the coating process.
  • the device 50 comprises a control unit 70 and the coating device 60 is controlled by the control unit 70.
  • the coating applied by the coating device 60 to the shrink film 2 can be controlled and / or changed via the control unit 70.
  • the new desired coating area can be entered into the control unit 70.
  • the control unit 70 controls the coating device 60 accordingly.
  • various product parameters and / or known weak points of the new shrink wrap to be created can be entered into the control unit 70.
  • the control unit 70 determines the required coating area and controls the coating device 60 accordingly.
  • the film wrapping device 56 may comprise at least one first sensory detection unit 72, which detects the positioning of the coated shrink film regions.
  • These may be, for example, image-processing sensors.
  • sensors can be used which detect certain physical parameters of the coating (for example refractive index, reflective or absorbing properties etc.).
  • the sensory data are transmitted to the control unit 70. This compares the measured actual values with desired values which are either stored in the control unit 70 or calculated by the respective shrinkage package 30 to be produced. In the case of a deviation of the actual coating pattern from the desired coating pattern, this is adjusted by controlling the coating device 60. Accordingly, product control and product optimization in the current packaging operation is possible. As a result, the number of defective products and thus the proportion of inadequate goods can be reduced.
  • the shrinking station 54 may be assigned at least one second sensory detection unit 73, which records the shrinkage result of the shrink wrap 30 and transmits the data to the control unit 70. For example, can be determined by the second sensory detection unit 73, whether the shrink wrap 30 weak points and / or unwanted holes. The sensory data are transmitted to the control unit 70. This compares the measured actual values with desired values which are either stored in the control unit 70 or calculated by the respective shrinkage package 30 to be produced. In the case of a deviation of the actual shrink wrap from the desired shrink wrap, the coating pattern is adjusted by controlling the coating device 60. Also in this embodiment, product control and product optimization is ongoing Packaging operation possible, whereby the number of defective products and thus the proportion of inadequate goods can be reduced.
  • FIG. 9 shows the application of so-called coating patterns.
  • Fig. 9A - Can be reduced up to 100% of the shrinkage force of the shrink film.
  • the paint is applied in a regular pattern 41 in which coated mini partial areas 42 alternate with uncoated mini partial areas 43 (see, in particular, enlargement of FIG. 9D ), it is possible to achieve a partial reduction in the shrinkage force in the correspondingly coated area and to reduce the shrinkage rate of the shrink film in the coated area to a defined extent.
  • the direction of the path of the shrink film during the shrinking process can be influenced in a targeted manner by a directed coating pattern.
  • a directed coating pattern for example, according to FIG. 9B and FIG. 9C provided a regular pattern 41 b, 41 c of coated longitudinal strips 42 L and uncoated transverse strips 42 L applied to the shrink film so that the transverse shrinkage is largely reduced, while the longitudinal shrinkage is largely unaffected.
  • the pattern can serve to reduce the longitudinal shrinkage largely and to leave the transverse shrinkage largely unaffected.
  • the use of coating pattern 41 can also be used as a smooth transition to uncoated normal areas.
  • a central portion of the coated area is coated over its entire surface with lacquer, while in the edge areas a coating in the form of a regular pattern is provided.
  • a pattern may be formed by a plurality of adjacent coated and uncoated minibars.
  • the size of the respective coated and uncoated mini-sections, in particular their size ratio to each other determine the shrinkage rates of the respective film area. The higher the size fraction of uncoated mini- sections, the higher the respective shrinkage rate.
  • a flowing transition is provided starting from a central, fully coated partial region, by providing a regular pattern of coated and uncoated mini-regions the size of uncoated mini sections increases towards the outside.
  • Coating patterns can be used, for example, to prevent wrinkling on the shrink wrap, for example in the area of the side surfaces and / or the film eyes.
  • the run-off zones of the coating can be provided with "dot patterns" which ensure a smooth transition of the shrinkage rate.
  • the coating 40 serves to reinforce the shrink film 2 in areas, stresses occurring in a shrink wrap may well be dissipated to other areas through the use of coating patterns.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Wrappers (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
EP13191541.5A 2012-11-09 2013-11-05 Schrumpfverpackung sowie vorrichtung und verfahren zur herstellung derselben Active EP2730515B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201210021916 DE102012021916A1 (de) 2012-11-09 2012-11-09 Schrumpfverpackung, Vorrichtung zur Herstellung einer Schrumpfverpackung und Verfahren zur Herstellung einer Schrumpfverpackung

Publications (2)

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EP2730515A1 EP2730515A1 (de) 2014-05-14
EP2730515B1 true EP2730515B1 (de) 2016-08-10

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EP (1) EP2730515B1 (zh)
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Cited By (1)

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US11565864B2 (en) 2018-08-17 2023-01-31 Niagara Bottling, Llc Perforated case pack top panel

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CN105416837B (zh) * 2015-11-30 2019-04-26 杭州德雅包装有限公司 一种防结疤黏连的收缩膜及其生产工艺和用途
DE102016106463A1 (de) * 2016-04-08 2017-10-12 Krones Ag Vorrichtung zum Verpacken und/oder Gruppieren von Artikeln mit Schneidelement
US11299333B2 (en) 2017-04-04 2022-04-12 The Procter & Gamble Company Flexible packages with flat panels
EP3630636A1 (en) 2017-05-24 2020-04-08 The Procter and Gamble Company Flexible packages with flat panels
EP3630646B1 (en) 2017-05-26 2021-08-25 The Procter & Gamble Company Flexible packages with self-folding
DE102018126839A1 (de) * 2018-10-26 2020-04-30 Krones Aktiengesellschaft Foliengebinde mit Tragegriff, Verfahren zu dessen Herstellung sowie Vorrichtung zur Herstellung von Foliengebinden mit Tragegriff
DE102018132942A1 (de) * 2018-12-19 2020-06-25 Krones Aktiengesellschaft Foliengebinde mit Tragegriff, Verfahren zu dessen Herstellung sowie Vorrichtung zur Herstellung von Foliengebinden mit Tragegriff
CN109573131A (zh) * 2018-12-25 2019-04-05 重庆具码科技有限公司 一种使用包装箱包装物品的方法
CN111846456B (zh) * 2020-08-28 2022-03-25 歌尔科技有限公司 包装盒热塑封工艺及热塑封包装盒
US20230234332A1 (en) * 2022-01-27 2023-07-27 Multi-Color Corporation Shrink sleeve label with pre-applied secondary label

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Also Published As

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DE102012021916A1 (de) 2014-05-15
CN103803174A (zh) 2014-05-21
EP2730515A1 (de) 2014-05-14
CN103803174B (zh) 2016-08-17

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