EP2743204A1 - Reclosable package for bulky, stackable goods, method for its manufacture and device for performing the method - Google Patents

Abstract

The package has surfaces provided with a pre-perforated tear-off strip that is frictionally secured to a handle, where the package is made from a shrunk polymer film. Stackable goods are stacked in a matrix and fixed at an edge side that is surrounded by the shrunkpolymer film. An outer side of the handle is printed with a non-transparent polymeric film. The handle is non-positively connected with the shrunk polymer film in a region of the tear-off strip. A pull tab is arranged at a top side and comprises a reinforced inner shell. Independent claims are also included for the following: (1) a method for manufacturing a re-sealable package (2) a device for manufacturing a re-sealable package.

Description

TECHNICAL PART

The present invention relates to resealable packages according to the preamble of the independent claims.

Typical examples of lumpy, stackable goods are goods which are held in rectangular or round cans or containers. Often stackability is supported by encompassing edge segments or mating, overhanging edges and molded grooves. Such goods, as they are known for example from the field of drinks or canned, develop in multilayer arrangement a considerable stack pressure and are therefore provided with a reinforced packaging.

DESCRIPTION OF THE PRIOR ART

Generic packaging, for example, from the DE 6 931 862 U1 or the DE 7 601 940 U1 known: In a sturdy cardboard taken the lumpy good on a pre-perforated, resealable pull-tab or a closable flap removable. Due to the stacked good on the one hand and a stackable packaging on the other hand, despite high stack density on the removal option immediately a sale done without cumbersome unpacking or repackaging would be necessary.

A disadvantage of the generic packaging that they contribute significantly as a stable, enveloping boxes to the weight and unit costs are significantly increased by the expensive, processed raw materials of packaging. A further disadvantage is that without additional, lateral printing the product is visible and identifiable only when the packaging is opened laterally.

It was therefore an object of the present invention to overcome the disadvantages of the prior art and to provide a package which can provide improved saleability in combination with reclosability without substantial increase in unit prices.

The solution of this object is achieved according to the features of the independent claims. Advantageous embodiments will become apparent from the dependent claims and the following description.

SUMMARY OF THE INVENTION

According to the invention, the reclosable package for lumpy, stackable Good, characterized in that the packaging is formed from a shrunk-on polymer film, wherein at least one of the surfaces has a pre-perforated tear-open with frictionally attached thereto handle.

DESCRIPTION OF THE INVENTION AND ADVANTAGEOUS CHARACTERISTICS

Despite many years of demand for a cost-effective packaging, which can compete with the conventional film packaging price and still offers reclosability, the inventors could no established or known solution for this purpose in the field of wax products, especially tealights and Maxilichte determine.

In the present case, a shrunk-on polymer film is proposed for the first time as packaging, in which a tear-open tab has been preformed by simple perforation. About a non-positively attached handle - for example, a fixed tear thread or a glued hinge with protruding handle tongue - the tab can be wound along the perforation and reversibly closed in a known manner - for example, a pressure-sensitive adhesive or a Velcro connection or a Plastoferrit double layer ,

A shrunk-on polymer film in this case refers to a polymer film which is thermally and / or vacuum tightly applied to the stackable material with tension and fixed in this position.

The pre-perforated tear-open tab is arranged on at least one of the outer surfaces of the packaging and held slightly smaller than the respective outer surface, so that at the edge the overall tension of the polymer film is substantially retained.

The packaging is preferably characterized in that the stackable good is at least one good selected from the group consisting of wax candles, Pillar candles, grave lights, table candles, Advent candles, tealights, maxilights, tealights in tealight holders, scented glass, glass holders; most preferably, the lumpy, stackable good is tealights or maxilas. Tealights or Maxilichte are taken in a one-sided open, round or rectangular container, which advantageously increases the stackability of the light on overhanging edges and bottom grooves.

Preferably, the packaging is characterized in that the stackable material is arranged stacked in a matrix and is at least peripherally embraced by the shrunk-on polymer film. As a result, a firmer, taut version of a lumpy, arranged in at least one layer, preferably arranged in multiple layers, more preferably at least three layers arranged rectangular tealight composite is particularly advantageous accessible, which in turn has a much better stackability. Advantageously rectangular container of the lumpy Guts, in particular aluminum, thereby increase the packing density and can provide via corner-sided grooves or folds grooves or grooves in densely stacked composite, which can advantageously serve as frictional engagement areas for the polymer film to stabilize the composite in addition.

Preferably, the packaging is characterized in that the polymer film is designed as an enveloping, edge-welded, shrunk-on and top side perforation, preferably trapezoidal perforation, provided, transparent film. The transparent film ensures even with packaged goods that the goods visually always recognizable and effective in direct sales can be perceived. A topside, preferably trapezoidal perforation fulfills an advantageously versatile dual function: on the one hand, individual pieces can be sold directly out of the composite, on the other hand, the composite can be sold as a whole and the end user can reuse the package as a resealable package and individual pieces as needed remove. The shrunk-on polymer film is preferably formed from at least one material selected from the group comprising PETP, PE, PVC, PP, PS, PAN, PA, PC, particularly preferably based on PE (polyethylene).

Preferably, the packaging is characterized in that the handle is designed as an opaque, externally printed polymer film. A polymer film shows over conventional paper labels a higher elasticity and better compatibility with the enveloping, shrunk-on polymer film; due to the opaque design printed text or specified additional information is recognizable with the same clarity as with classic paper banderols. The printed polymer film is preferred formed from at least one material selected from the group comprising thermoset condensate, thermoplastic condensate, thermoplastic polymer, thermosetting polyadduct, thermoplastic polyadduct, PE, PP, PVC, PMMA, PA, polyacrylate, polyacrylonitrile, polystyrene, PET, particularly preferred of PP (polypropylene) with polyacrylate and / or thermoplastic adhesive layer and at least one pressure-sensitive adhesive selected from the group comprising polyacrylates, polyesters, polychloroprenes, polyisobutenes, polyvinyl ethers, polyurethanes, resin adhesive, dispersion adhesive. Particularly preferred as the adhesive is a multi-component adhesive is used, in which a first component provides an initial adhesion, while other components for adjusting the adhesive and / or adhesive force are included.

The packaging is preferably characterized in that the handle in the region of the tear-open tab is frictionally connected to the shrunk-on polymer film and that at least in sections a reversible pressure-sensitive adhesive is arranged on the tear tab. By a reversible pressure-sensitive adhesive reclosability can be provided particularly cost. Preferably, the pressure-sensitive adhesive in circumferential, continuous layer is arranged on the edge side of the tear-open tab, so that even when the tear-open tab is merely folded onto a deformed, partially emptied packaging, a fixation is ensured at all marginal support points.

Preferably, the packaging is characterized in that the packaging has a substantially rectangular, flatly extended basic shape with flat top side in the same direction stacked Good and the pull tab is disposed on the top and preferably a reinforced bottom shell by multi-layer shrunk polymer film and / or a reinforced inner shell having. The two-dimensional, rectangular spatial form advantageously improves the stackability and packing density of the packaging itself and, with the tear-off tab arranged on the top side, offers a maximum edge for the tear-open tab so that the opening of the tab hardly influences the stability of the stacking of the contained material.

The claimed packaging is preferably provided by a process comprising the process steps a) stacking the lumpy product, b) perforating the heat-shrinkable polymer film, c) wrapping the stacked product with the polymer film and sealing and / or shrinking the polymer film while setting an elastic , comprehensive tension of the enveloping polymer film d) frictional attachment of a handle in the perforated area.

Perforation and subsequent shrinkage prevents a packing tension of the foil from tearing open the perforation hole and causing it to expand irregularly during the production of the perforation holes. The trained in tension-free film perforation holes are uniform in shape and can in the subsequent Aufschrumppfung a frictional version of stacked Good, without an uncontrolled tearing would be feared. Particularly advantageous is the final Aufschrumpfung under at least short-term, outside hot air impingement. In this case, the freshly formed edges of the perforation holes in the region of edges, cracks or projections are melted and stabilized, so that later a uniform tearing behavior along a perforation seam is ensured.

Particularly preferably, the advantageous method comprises the steps a1) stacking of tealights or maxilights in a rectangular, flatly extended spatial form, b1) perforation of a heat-shrinkable polymer film to form a trapezoidal area enclosed by the perforation, c1) enveloping the spatial form while aligning the trapezoidally enclosed area d2) top-side printing of an elastic, non-transparent polymer film; and d2) applying at least one pressure-sensitive adhesive and at least one bonding adhesive to the non-transparent polymer film, d3) attaching the printed, nontransparent polymer film on the upper side of the shrunk-on polymer film, wherein the bonding adhesive provides a frictional connection in the trapezoid area enclosed by the perforation, and the adhesive adheres to the edge of the trapezoid enclosed area is arranged.

With particular preference, a film based on a stretched polyethylene serves as the transparent, heat-shrinkable polymer film.

Particularly preferred as non-transparent polymer film is a film based on a polypropylene.

Particularly preferred as a bonding adhesive is a multi-component adhesive based on an acrylate and / or a hot melt adhesive.

The adhesive used is particularly preferably an adhesive based on a tacky copolymer and / or polymer in combination comprising at least one substance from the group of resins, plasticizers and antioxidants.

Preferably, for carrying out the method, an advantageous device, consisting of several, built in a device assemblies, comprising a stack assembly A, which tealights or Maxilichte is formed individually and in a loose group and stacking, a needle assembly B, which the heat shrinkable polymer film is controllably perforating, a shrink-on assembly C, which is the shrinkable polymer film with controlled orientation enveloping, sealing and shrinking formed and an application assembly D, which applying a handle in the form of an elastic polymer film in a controlled orientation, optionally the handle preparatory printing on top and with different adhesives on the underside, is formed. Such a device with exchangeable assemblies allows particularly space-saving with improved maintenance options by rapid replacement of the cost-effective packaging of tealights / Maxilichten in a package that is suitable both for shipping and for retail or pack sale.

Particularly preferably, the needle assembly B comprises at least one set of conically widening needles, which are arranged to be introduced into the film to be perforated with controllable penetration depth. Due to the conically widening needles, the edge of a perforation hole is pushed evenly outwards during the penetration of a needle and a stable, uniform edge with improved uniform tearing behavior is achieved, which is particularly easy to adjust via the penetration depth of the needles during the perforation.

Further advantages emerge from the exemplary embodiments. It is understood that the above-described features and advantages and subsequent embodiments are not restrictive. Advantageous additional features and additional combinations of features, as explained in the description, can be realized within the scope of the independent claims in the claimed subject matter, both individually and in a deviating manner, without departing from the scope of the invention.

BRIEF DESCRIPTION OF THE FIGURES

• Fig. 1 vorteilhafte Ausführungsform einer flächig erstreckten, rechteckigen, erfindungsgemäßen Verpackung.

The figures illustrate on the basis of basic sketches ....

• Fig. 1 advantageous embodiment of a flat, rectangular, packaging according to the invention.

DETAILED EXPLANATION OF THE INVENTION BY HAND OF EXAMPLES

Fig. 1 illustrates in isometric view an advantageous embodiment of a flat, rectangular, packaging according to the invention. The handle in the form of a printed, glued polymer film is illustrated here as oberseitges, dot-dashed square, which encloses a trapezoidal, punctured Preforation with common, permanent connection. Here, in the area of the trapezoidal surface, the handle is frictionally connected with the shrunk-on polymer film and provided with a reversible pressure-sensitive adhesive on the outside at three points illustrated as rectangles. Now, if the handle in the area of the arrow with thumb and forefinger taken and lifted upwards, the perforation is torn open obliquely to its course direction with appropriate leverage simplified and lifted the trapezoidal tab together with the handle. Resealability is ensured by means of the edge-side pressure-sensitive adhesive points of the handle, while the transparent, shrunk-on polymer film makes it easy to see a covered tea-light composite even in a lateral view. In this embodiment, the package offers both the possibility of improved retail sale of tealights on a shelf with guaranteed lateral recognizability of the packaged good as well as the ability to sell the package as a whole, the removal possibility of individual tealights then in the consumer side storage / use for Wear comes.

Claims (10)

Reclosable package for lumpy, stackable Good, characterized in that the packaging is formed from a shrunk-on polymer film, wherein at least one of the surfaces has a pre-perforated tear-open with frictionally attached thereto handle. Packaging according to the preceding claim, characterized in that the stackable good is at least one selected from the group consisting wax candles, pillar candles, grave lights, table candles, Advent candles, tealights, Maxilichte, tealights in tealight holders, fragrance glass, glass holders, preferably tealights or Maxi lights. Packaging according to one of the preceding claims, characterized in that the stackable material is arranged stacked in a matrix and is at least peripherally embraced by the shrunk polymer film. Packaging according to one of the preceding claims, characterized in that the polymer film is formed as an enveloping, edge-welded, shrunk on top and provided with trapezoidal perforation, transparent film. Packaging according to one of the preceding claims, characterized in that the handle is formed as an opaque, externally printed polymer film. Packaging according to one of the preceding claims, characterized in that the handle is frictionally connected in the region of the pull tab with the shrunk-on polymer film and that at least partially a reversible pressure sensitive adhesive is arranged on the edge side of the tear tab. Packaging according to one of the preceding claims, characterized in that the packaging has a substantially rectangular, flatly extended basic shape with a flat upper side in the same direction stacked Good and the tear tab is arranged on the top and preferred having a reinforced bottom shell by multi-layer shrunk polymer film and / or a reinforced inner shell. A method for producing a resealable package for lumpy, stackable material according to any one of the preceding claims, wherein the packaging is formed from a shrunk polymer film and at least one of the surfaces has a vorperforierte pull tab with frictionally attached thereto handle, comprising the steps of a) stacking the lumpy Guts b) perforation of the shrinkable polymer film, c) wrapping of the stacked product with the polymer film and sealing and / or shrinking of the polymer film with adjustment of an elastic, comprehensive tension of the enveloping polymer film d) frictional attachment of a handle in the perforated region. Method according to the preceding claim, characterized in that the method comprises the steps of a1) stacking tealights or maxilights in a rectangular, flatly extended spatial form, b1) perforating a heat-shrinkable polymer film to form a trapezoidal area enclosed by the perforation, c1) enveloping the spatial form c2) edge sealing of the polymer film c3) final shrinkage under hot air application, d1) printing on the top of an elastic, nontransparent polymer film, and d2) applying at least one pressure sensitive adhesive and at least one bonding adhesive on the nontransparent polymer film, d3 ) Attaching the printed, opaque polymer film on the top of the shrunk-on polymer film, wherein the bonding adhesive provides a frictional connection in the trapezoid enclosed by the perforation area and the pressure-sensitive adhesive is arranged on the edge of the trapezoidally enclosed area. Apparatus for carrying out the method according to one of the two preceding claims, comprising a plurality of assemblies installed in a device, comprising a stack assembly A, which is configured to receive or stack tealights or maxilas individually or in a loose group, a needle assembly B, which is controllably perforating the heat-shrinkable polymer film, a shrink-on assembly C, which enclosing the heat-shrinkable polymer film with a controlled orientation, sealing and is formed shrinking and an application assembly D, which a handle in the form of an elastic polymer film applying in a controlled orientation, optionally the handle preparatory top side printing and with different adhesives underside, is formed.

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