WO2009000565A1

WO2009000565A1 - Packaging means with improved water vapour barrier rating

Info

Publication number: WO2009000565A1
Application number: PCT/EP2008/052689
Authority: WO
Inventors: Wolfgang Barthel; Ulf Arno Timmann
Original assignee: Henkel Ag & Co. Kgaa
Priority date: 2007-06-22
Filing date: 2008-03-05
Publication date: 2008-12-31
Also published as: ES2366870T3; US20100147725A1; DE102007029297B3; PL2158132T3; ATE513749T1; EP2158132A1; EP2158132B1

Abstract

Packaging means made of plastic, in particular for a free-flowing or pourable surfactant-containing and/or bleach-containing material, for example detergent or cleaning-agent powder, comprising a base, a top and a body, wherein the packaging means has a water vapour permeability level > 15 g/(m2*d) and wherein at least the body of the packaging means is covered over, in part, by a sheet-like presentation and identification means which butts against the outer surface of the packaging means and has a water vapour permeability level 2*d).

Description

Packaging with improved water vapor barrier

The invention relates to a packaging material made of plastic with a water vapor permeability> 15 g / (m ^{2 *} d) whose outer surface is at least partially covered by a fitting on the packaging material outer surface equipment and identification means with a water vapor permeability <15 g / (m ^{2 *} d).

State of the art

Plastic containers are used in manifold form and execution as a means of packaging for the transport and storage of a variety of different packaged goods.

In the case of a large number of packaged goods, it is necessary for the plastic packaging material to provide a sufficient water vapor barrier in order to prevent moisture from penetrating through the packaging material walls toward the packaged goods or out of the interior of the packaging material into the environment.

In the former case, clumping may occur, for example, in the case of scatterable packaged goods, so that a convenient removal of such damaged packaged goods from the packaging material is no longer guaranteed. Furthermore, the packaging material can also be chemically changed by the penetrating water vapor. For example, penetrating water vapor causes a deactivation or degradation of bleach and / or enzymes in detergent and cleaning agent powders. Also unwanted biological effects such as the growth of bacteria or mold in the packaged goods are possible by an increased occurrence of water vapor.

In particular, in the case of aqueous packaged goods, on the other hand, an insufficient water vapor barrier can lead to a thickening of the packaged goods if water vapor can escape into the environment through the packaging wall. For such packaged goods, this is particularly relevant in warm temperatures or direct sunlight. This then leads to a changed flow behavior and concentrations in the liquid packaged goods, whereby a precise dosage for the user is difficult. As a result of the escaping water vapor, the associated loss of volume can lead to buckling of the corresponding container, which is undesirable for esthetic reasons.

Furthermore, due to the loss of liquid, soluble components of the liquid product may also precipitate and settle to the bottom of the packaging. Finally, the creeping decrease in level in the bottle, which accompanies the escape of water, is undesirable, especially if the bottle is transparent and a low level can be perceived by the consumer.

This is particularly critical for plastics of non-fossil origin such as starch-based plastics or polylactic acid, which usually have a relatively low water vapor barrier, so that they sogg. Bio-plastics are not suitable today for many packaged goods.

Usually, renewable, ie renewable resources are used for the production of such bio-plastics. In addition to the possible use of each regionally available agricultural raw materials for the production of bio-plastics, another advantage is that they are biodegradable according to the intended use in a relatively simple and rapid manner, for example by composting according to DIN EN 13432, so that a more extensive Use and widespread use of bio-plastics is desirable.

To improve the water vapor barrier such bio-plastics has been proposed in many places in the prior art to dampen for example with SiO _x or aluminum, so that, consequently, the entire surface of thereof shaped packaging means has a corresponding coating. In particular, the evaporation with aluminum, however, has a number of disadvantages. On the one hand, a metal vapor-deposited plastic film loses its transparency and, on the other hand, they are usually unsuitable for use in a household microwave, so that an application for packaging and preparation of hot food regularly eliminates. In addition, the vapor-deposited layer does not contribute to an increase in the structural stability of the molded container.

Furthermore, bio-plastics vapor-deposited with metals or SiO _x with increasing metal or SiO _x concentrations significantly lose their inherently good biodegradability. Especially in the case of metal-coated bio-plastics it has to be critically questioned whether the introduction of metals like aluminum into the environment, which are usually not naturally degraded but only accumulated, makes sense from an ecological point of view, especially against the background of the latest research results indicate a direct association of diseases such as Parkinson's disease or Alzheimer's disease with increased exposure to bioabsorbable aluminum.

Task:

The object of the invention is therefore to improve the steam barrier of a packaging material made of plastic, with a low water vapor barrier to resource-conserving, cost-effective and easy to produce way. The object is achieved by a packaging with the features of claim 1.

The advantages of the invention are on the one hand an improvement of

Water vapor barrier properties, which is ensured by the inventive plastic packaging means a sorted separation of biodegradable plastic materials and not or only with difficulty biodegradable plastic materials after use of the cardboard packaging.

Due to the exclusive use of technologically established methods for producing the cardboard packaging, the packaging material according to the invention can be manufactured inexpensively.

The packaging material according to the invention is particularly suitable for filling, storage, transport and dispensing of flowable or spreadable products, in particular for fillers from the group of textile washing, - cleaning and care agents, dishwashing detergents, personal care products, pharmaceuticals, agricultural auxiliaries, building materials, dyes, adhesives or food.

packaging

The invention is particularly suitable for substantially dimensionally stable plastic packaging material such as, for example, cups, cans, buckets, barrels, bottles, canisters, cans, drums or tubes. However, it can also be used in principle for flexible containers such as bags or sacks.

The packaging can take any form. Round or rounded cross-sectional shapes are advantageous, since "sharp edges" formed on a packaging material lead to undesirable stress peaks in the enveloping film-like equipment and marking means and thus can cause unintentional tearing of the film-like equipment and identification means.

Thus, the equipment and identification means easily rests against the surface of the packaging, the contour of the packaging should be as flat as possible. However, it is possible that equipment and identification means in such a way that it follows the contour of the packaging tight-fitting.

Cups, cans and barrels

A cup in the sense of this application is an essentially dimensionally stable container for

Inclusion of a flowable or pourable product, which through a soil and a - A -

Sheath shaped filling volume, wherein the cross section of the bottom substantially corresponds to the cross section of the cup opening.

In particular, cans may be a pruned can, a can, a can lid, a retracted can, a fold lid can, a fold lid fill can, a folded can, a drawn can, a can, a siphon, a tearing can, a sippy can, a slip lid can, or a stepped can.

Barrels may be selected from the group of belly drums, stave casks, caissons, garage barrels, semi-cauldrons, pack barrels, reel drums, heavy barrels, bead drums or roll bead drums.

bottle

A bottle in the context of this application is a closable, substantially dimensionally stable container for receiving a flowable or pourable product, which comprises a formed by a bottom and a jacket filling volume, wherein the filling volume through a through the shell in the form of a towards the opening tapered bottleneck shaped opening can be filled or emptied, wherein the cross section of the bottom is greater than the cross section of the opening.

For example, a bottle may be an aerosol bottle, a look-through bottle, a beverage bottle, especially ale bottle, goitre bag, goitre bottle, flail bottle, stony bottle, stu-bobby flap, vichy bottle, wide-mouth bottle, and mega-flat bottle, squeeze bottle, dropper bottle, packaging bottle, such as a bottle.

The wall thickness of the bottle is chosen so that the bottle is substantially dimensionally stable. In one embodiment of the bottle, the walls or shell surface may be elastically deformable to exert pressure on the products in the bottle and thereby assist in the dispensing of product from the container.

The bottle may be formed in a further advantageous embodiment of the invention as a two or multi-chamber container. Advantageously, the chambers then each contain different products from each other. For example, it is possible to store a liquid product in one chamber and a granular product in another chamber. Other conceivable combinations are listed in the following table:

In a further embodiment of the invention, the closure of the bottle is covered by the equipment and identification means at least partially or in sections. This makes it possible, for example, in a simple way a seal of originality or -lock realize _^

bag

For the purposes of this application, a flexible packaging means is a packaging material which substantially alters its shape even under light load when used as intended. In particular, the flexible packaging is designed as a bag or sack.

The bag may be selected from the group of bottom bags, block bags, block bags, block bottom bags, block bottom bags, floor bottom bags, bottom fold bags, cross bottom bags, round bottom bags, stand-up pouches, double bags, window bags, flat bags, flap bags, flap pocket bags, conical bags, tubular bags, gusseted bags, pleated bags, sealed edge bags, Triangular seal bag, two-seam bag, flap flap bag, carrying bag and / or valve bag.

The bag may be selected from the group of single-use bags, sack bags, pleated bags, flax sacks, cross-bottom sacks, multi-layer sacks, round bottom sacks and / or valve sacks. Packaging material of the packaging

The packaging material according to the invention is molded from a plastic. The plastic formed

Packaging has a water vapor barrier of less than 15 g / (m ^{2 *} d).

Suitable packaging materials for the packaging material can be selected, for example, from the group of polyolefins, polyethylene terephthalates, acrylonitrile-butadiene-styrene copolymers, cellulose acetates, ionomers, polyacrylonitriles, polyamides, polycarbonates, polyesters, polystyrenes, polyterephthalic acid esters, polyurethanes, polyvinyl alcohols, polyvinyl chlorides.

It is particularly advantageous to select a packaging material from the group of bio-plastics, which are essentially produced from renewable, renewable resources. These can be selected from the group of cellulose-based plastics, plastics based on polylactic acids (PLA), polyhydroxybutyrates (PHB), polyhydroxyvalerates (PHV), polyhydroxyalkaronates (PHA), thermoplastic starch blends, polycaprolactones (PLC).

It is particularly advantageous to form the packaging from a PLA plastic. On the one hand, PLA has a high level of transparency, which means that the PLA-formed packaging has a visually attractive and attractive appearance; on the other hand, PLA has a sufficiently high degree of rigidity and can be processed on standard molding machines.

For ecological reasons, it is advantageous that the packaging material can biodegrade in a simple and as complete as possible manner.

In order to further reduce the weight of the packaging material and thus the primary material requirement, it may be advantageous to produce the packaging material from foamed plastics.

Equipment and labeling

An equipment and identification means in the sense of this application is a film-like packaging aid which is suitable for covering the packaging material at least in sections in such a way that it bears against the outer surface of the packaging material.

Attached in this context means that the equipment and marking means with its packaging material towards the surface touches the outwardly oriented surface of the packaging, wherein in this case also the interposition of an adhesive layer between packaging material surface and equipment and identification medium surface is detected. The equipment and identification means is formed from a film which has a water vapor permeability <15 g / (m ^{2 *} d).

The equipment and identification means and the packaging material are configured in such a way that a good physical contact between equipment and identification means and the packaging material is permanently ensured and the equipment and identification means is not easily damaged when handling the packaging.

The connection between the equipment and identification means and the packaging can be formed non-positively, cohesively and / or positively. A frictional connection can be realized, for example, by shrinkage or stretching of equipment and identification means relative to the packaging. A cohesive connection can be effected by an adhesive bond. It is also conceivable to connect the equipment and identification means by means of an in-mold labeling method with the packaging material.

The film-like equipment and marking agent preferably has a thickness of between 5 μm and 100 μm, more preferably between 7.5 μm and 75 μm, particularly preferably between 10 μm and 60 μm.

The ratio of the packaging material jacket thickness to the thickness of the equipment and identification means is preferably> 1. Particularly preferably, the ratio of the packaging material jacket thickness to the thickness of the equipment and identification means is between 1, 5 and 100.

The film can be, for example, a coextruded film, an expansion film, an extrusion film, a flat film, a stretched film, a cast film, a calender film, a foam film, a tubular film or a blown film or a film Shrink film act.

It is preferred that the equipment and identification means arranged in one layer adjacent to the packaging.

In a further advantageous embodiment of the invention, the equipment and identification means is detachably arranged on the packaging. As a result, the Ausstattungsund Kennzeichnungsmitte be easily solved by the packaging and disposed of separately, so that, for example, consisting of a readily biodegradable biodegradable plastic packaging material composting, while the equipment and labeling of a plastic film of fossil origin of a thermal utilization is supplied , The equipment and identification means may be fixed by one or more cohesive connections to the packaging. The cohesive connection can be configured such that upon release of the equipment and identification means from the packaging the integral connection is destroyed and can not be restored, so that the equipment and identification means no longer removed by the original cohesive connection to the packaging after its removal from the packaging liable. However, the cohesive connection can also be designed such that a repeated release and adhesion of the equipment and marking means is made possible on the cap.

The cohesive connection can be selected, for example, from the group of adhesive bonds, welded joints or sealing compounds.

It is particularly advantageous if the adhesive layer used provides a water vapor barrier. Thus, it is also conceivable that the water vapor barrier of the adhesive layer is greater than the water vapor barrier of the overlying the adhesive layer equipment and marking agent. In this case, it is advantageous to form the adhesive layer closed area between equipment and identification means and packaging.

In order to facilitate the detachment of the equipment and marking means, an opening aid may be provided on the equipment and identification means, which allow the removal of the equipment and marking means without the aid of opening means, such as a pair of scissors or a knife.

Such opening aids can be designed, for example, as a perforation, tear-off tab, tear tape, tear-open thread, tear-open tab, tear-open seam, scribe tear-open line or trunk tear strip.

It is particularly advantageous that the equipment and identification means substantially completely covers the lateral surface of the packaging means, the bottom of the packaging material remaining substantially unenclosed by the equipment and identification means. In a further preferred embodiment of the invention, between 50-95% of the surface of the packaging material is covered by the equipment and identification means. It is particularly preferred to cover between 65-90% of the packaging material surface with the equipment and labeling means. As a result, on the one hand, a sufficient water vapor barrier is realized for a large number of possible applications. In a further preferred embodiment of the invention, the equipment and identification means is positively connected by an in-mold labeling method with the packaging.

Packaging material Equipment and labeling

The equipment and identification means is formed from a packaging material, which is a

Water vapor permeability less than 15 g / (m ^{2 *} d).

The packaging material of the equipment and marking agent should have good printability. The packaging material can be substantially printed over the entire surface and thus formed substantially opaque, whereby it forms a correspondingly good UV barrier, which protects the contents of the packaging from UV radiation from the environment. This is particularly advantageous for packaged goods with UV-sensitive ingredients, such as enzymes, vitamins, dyes or fragrances, etc.

The packaging material may also contain special UV barrier substances and / or UV stabilizers. This can be advantageous, in particular when using too large a proportion of transparent equipment and marking agent, in order to protect a UV-sensitive packaged product. The use of UV barrier substances in the equipment and marking agent also has the advantage that in the equipment and labeling comparatively less UV barrier substances must be introduced for a defined UV barrier effect than in the packaging material, so that the corresponding UV barrier is less expensive to produce ,

However, it is also conceivable that the surface of the packaging printed and enclosed by a transparent equipment and identification means.

Suitable packaging materials for the equipment and marking agent may, for example, be selected from the group of polyolefins, polyethylene terephthalates, acrylonitrile-butadiene-styrene copolymers, cellulose acetates, ionomers, polyacrylonitriles, polyamides, polycarbonates, polyesters, polystyrenes, polyterephthalic acid esters, polyurethanes, polyvinyl alcohols, polyvinyl chlorides. In particular, the packaging material for the equipment and marking agent may be a polyethylene or polypropylene.

In order to realize a particularly good water vapor barrier, it is also possible to use multilayered and / or composite films as equipment and identification means. Particularly preferred in this case are multilayer films or composites consisting of PET-AI-PE, PET-PE or BOPP-PE. Packqut

When using the packaging according to the invention flowable and free-flowing packaged goods are particularly preferred.

The pourable packaged goods may in particular be detergent powder, detergent granules, detergent powder, detergent granules, salt or the like.

The flowable packaged goods are preferably liquid or gel detergents and / or cleaners, personal care products, adhesives, building materials or the like.

In the following the invention will be explained in more detail with reference to exemplary embodiments illustrative drawings. In this case, particularly preferred embodiments and particularly preferred combinations of features are further described in detail. It shows:

Fig. 1: Plastic bottle with a bottle contour adapted label in one

Fig. 2: Plastic bottle with a bottle contour adapted label, closure and

Opening aid in a side view

reference numeral

1 packaging

2 head

3 floor

4 hull

5 Equipment and labeling

6 opening aid

7 closure

FIG. 1 shows a packaging means 1 designed as a bottle, which has a handle arranged in the fuselage 4 of the bottle 1. The bottle is partially covered by a foil-like equipment and identification means 5.

2 shows in a further embodiment of the invention, a bottle formed as a packaging

1 with a bottom 3 and a head 2 on which the closure 7 is located and a hull 4 which extends between the bottom 3 and the head 2. The bottle 1 has a waist approximately in the middle height of the bottle 1. The hull 4 is the contour of the bottle following a foil-like equipment and identification means 5 on the front and the back of the bottle covered. As can be seen from Fig. 2, here are areas at the bottom 3 and head

2 not covered by the equipment and identification means 5. In order to realize a user-friendly detachment of the equipment and identification means 5 of the bottle 1, an opening aid 6 designed as a tear-open tab is provided on the equipment and identification means 5.

Claims

claims

1. Packaging plastic, in particular for a flowable or pourable, surfactant and / or bleach containing packaged goods such as detergents or cleaning agents, wherein the packaging material has a water vapor permeability> 15 g / (m ^{2 *} d), comprising

• a floor,

A head, wherein an opening for removal of product from the packaging material is arranged on or in the head and the opening can be closed with a closing means,

• a hull,

characterized in that at least the body of the packaging material is at least partially covered by a voltage applied to the outer packaging material foil-like equipment and marking agent having a water vapor permeability <15 g / (m ^{2 *} d) and the film-like equipment and labeling between 50% and 95% , preferably between 65% and 90%, covers the surface of the packaging material and the film-like equipment and identification means is fixed by gluing to the packaging material.

2. Packaging according to one of the preceding claims, characterized in that the film-like equipment and identification means completely surrounds the body surface and leaves the soil uncovered, at least in sections.

3. Packaging according to one of the preceding claims, characterized in that the film-like equipment and marking means covers the bottom and / or the head of the packaging means at least in sections.

4. Packaging according to one of the preceding claims, characterized in that the film-like equipment and identification means covers the closing means at least in sections.

5. Packaging according to one or more of the preceding claims, characterized in that the adhesive layer has a water vapor permeability which is less than the water vapor permeability of the packaging material.

6. Packaging according to one or more of the preceding claims, characterized in that the adhesive layer has a water vapor permeability which is lower than the water vapor permeability of the film-like equipment and marking means.

7. Packaging according to one or more of the preceding claims, characterized in that the adhesive layer is applied substantially over the entire surface between the film-like equipment and marking means and the packaging.

8. Packaging according to one or more of the preceding claims, characterized in that the film-like equipment and identification means is connected by means of in-mold labeling cohesively with the packaging material.

9. Packaging according to one or more of the preceding claims, characterized in that the film-like equipment and identification means has a thickness between 5 microns and 100 microns, more preferably between 7.5 microns and 75 microns, more preferably between 10 microns and 60 microns ,

10. Packaging according to one of the preceding claims, characterized in that the ratio of the packaging material coat thickness to the thickness of the film-like equipment and marking agent is preferably> 1, more preferably> 1 and <100.

11. Packaging according to one or more of the preceding claims, characterized in that the film-like equipment and identification means is arranged in one layer around the packaging material around.

12. Packaging according to one or more of the preceding claims, characterized in that the film-like equipment and marking means is printed.

13. Packaging according to one or more of the preceding claims, characterized in that the film-like equipment and identification means is printed over the entire surface.

14. Packaging according to one or more of the preceding claims, characterized in that the film-like equipment and identification means is detachably arranged on the packaging.

15. Packaging according to one or more of the preceding claims, characterized in that an opening aid is provided on or in the equipment and identification means.

16. Packaging according to one or more of the preceding claims, characterized in that the film-like equipment and identification means is fixed by means of a releasable adhesive bond to the packaging.

17. Packaging according to one or more of the preceding claims, characterized in that the ratio of the trunk surface to the surface of the head and the bottom is greater than 2, preferably greater than 2.5, more preferably greater than 3.

18. Packaging according to one or more of the preceding claims, characterized in that the packaging of a bio-plastic, such as a cellulose-based plastic, a plastic based on polylactic acids (PLA), polyhydroxybuty rate (PHB), polyhydroxyvalerates ( PHV), polyhydroxyalkaronates (PHA), thermoplastic starch blends, polycaprolactones (PLC) and any blends of the aforementioned plastics.

19. Packaging according to one or more of the preceding claims, characterized in that the packaging is unprinted.