RU2600365C2 - Multilayer material to form containers - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: present invention relates to laminates, in particular, to a multilayer material suitable to form containers able to keep normally "complex in storage" chemical compositions, such as hair dye, toothpaste, food, creams, skin care compositions and cosmetic compositions. Multilayer material has the first surface to make the inner surface of the container, and the second surface to make the outer surface of the container. Herewith the multilayer material comprises an internal layer, an external layer and an intermediate barrier layer from metal foil, herewith the internal layer is located on the first side of the barrier layer surface from metal foil, and the external layer is located on the second side of the barrier layer surface from metal foil, while the multilayer material has the total thickness of at most 240 µm, and the internal layer contains polyethylene having the average density of 0.92-0.94 g/cm³.

EFFECT: technical result of the invention is obtaining the multilayer material and containers from it, which do not require the use of expensive materials or complicated production methods and also can be designed both for single and multiple use.

19 cl, 4 dwg

Description

The present invention relates to the field of laminates with an aluminum barrier layer (ABL). In particular, the present invention relates to a multilayer material suitable for forming containers capable of preserving generally “difficult to store” chemical compositions, such as hair dye.

Aluminum Barrier Laminates (ABLs) are well known as used to form tubes and containers suitable for storing a variety of products, such as toothpastes, food products, creams, and various skin care and cosmetic formulations. Some products, however, may be corrosive. As a result, aluminum, which is necessary because of the excellent barrier properties it provides, must be protected from the action of the product. Permanent hair dye formulations are a good example, and since they can be stored in aluminum tubes with a reinforced inner protective lacquer coating, they are not suitable for standard ABL laminate tubes. In such products, the corrosion-active composition can actually penetrate by diffusion through the inner polymer layers deposited to protect ABL aluminum foil and destroy the compounds on the surface. Destructive effects on the joints can cause delamination of the multilayer material, damage to the sealed areas and subsequent damage to the package.

For a number of reasons, including marketing pressure and cost issues, it is desirable to be able to store hair dye in tubes of ABL laminate, and this is the purpose of the present invention.

To obtain a tube from an ABL laminate in which such aggressive products can be stored, two key requirements must be met, namely that the product (1) will not leak out of the container before use by the consumer and (2) will not otherwise have contact with the atmosphere before use. Hair dye, for example, is very sensitive to air and corrosive (usually has a pH of about 12). If the hair dye is left under the influence of air, then it oxidizes to black and becomes both unsightly for consumers, and mainly stops working optimally.

Given only these limitations, it will be possible to develop a reliable container for such products. However, due to the relatively low cost of contents and the disposable type of containers, it is important that the containers do not require expensive materials or complex manufacturing methods. Of course, for single-use containers, there is a specific requirement to minimize the use of any excess packaging materials or cost.

Thus, there is a need for a multilayer material and containers that can overcome or at least reduce some or all of the problems associated with the prior art, or at least provide a suitable or optimal alternative.

The first object of the present invention is a multilayer material for forming a flexible container for storing hair dye or the like, the multilayer material having a first surface, which when used forms the inner surface of the container, and a second surface, which when used forms the outer surface of the container, while the multilayer material contains an inner layer, an outer layer and an intermediate barrier layer of metal foil, while the inner layer is on the first the outer side of the surface of the barrier layer of metal foil, and the outer layer is on the second side of the surface of the barrier layer of metal foil, the multilayer material has a total thickness of at most 240 μm, and the inner layer contains polyethylene and has an average density of 0, 92-0.94 g / cm ³ .

The present invention will now be described in more detail. Further, various aspects / embodiments of the present invention are defined in more detail. Each aspect / embodiment thus defined may be combined with any other aspect / embodiment or aspects / embodiments, unless expressly indicated otherwise. In particular, any feature indicated as preferred or advantageous can be combined with any other feature or features indicated as preferred or advantageous.

As used herein, the expressions “above,” “outside,” “inside,” and “below” and the like, used with respect to different layers, refer to a multilayer material with a predetermined uppermost outer surface and a given lowest inner (contacting the product) surface. In addition, these expressions and the expression “on” do not mean that the layers are necessarily in direct contact. For example, an inner layer that is “formed on” a metal foil barrier layer does not exclude the presence of one or more other intermediate layers located between the inner layer and the metal foil barrier layer, or additional layers provided under the inner layer (i.e. between the inner layer and the product).

The term “container” is used herein as referring to an article that may contain a product. Such products are usually liquids, gels or pastes. Preferred containers include tubes and bags. The container may further comprise a lid and, if necessary, fasteners for the lid (such as a protrusion) before it is formed into a suitable commercial container. Such components are well known in the art. However, the expression is used in this document as referring to the body of the container, which contains and is in contact with the marketable product. Preferably, the container is for storing hair dye.

The expression "flexible", as used herein, describes a container that can be bent or that can be easily bent and that does not collapse (if it is not bent too much). In this document, in connection with containers, the expression "flexible" means that if the container is subjected to force, for example, by filling with liquid or by applying pressure with a finger or hand, it will change shape without breaking. A flexible container can also be considered as being a “compressible” container.

The expression “hard-folded” is an expression of the art and is used herein as referring to the ability of a laminate to hold its shape continuously if it is bent or squeezed and not straightened back into an unbent or unpressed state. By way of example, a sheet of aluminum foil, if bent or shaped into an article, holds such a shape and thus can be considered as having excellent characteristics for rigid folding. Conventional plastic food-grade wrapping materials, on the other hand, tend to quickly bounce, open, or unfold after being shaped into products. This is an example of poor performance for rigid folding. Since the multilayer material contains foil and plastic layers, the property for rigid folding will lie between these extreme values.

The tube according to the present invention is particularly suitable for storing "difficult to store" or "aggressive" compositions. They include hair dyes (or hair dyes), are chemically reactive, and usually contain one or more acidic, basic, and / or oxidizing ingredients. These ingredients usually fall into the chemical classes of inorganic hydroxides, inorganic halides and peroxides. Inorganic hydroxides include ammonium hydroxide, as well as alkali and alkaline earth metal hydroxides (e.g., potassium hydroxide and calcium hydroxide). Inorganic halides include fluorides, chlorides, bromides and iodides of ammonium and metals such as transition metals, alkali metals and alkaline earth metals. Aluminum chloride, potassium chloride and ammonium fluoride are specific examples. Peroxides include hydrogen peroxide, urea peroxide (urea) and alkali and alkaline earth metal peroxides (e.g. sodium peroxide). Typical aggressive products have a pH of at least about 4 (for example, in the range of from about 1 to about 4 or from about 1 to about 3) or otherwise, pH values of more than about 9 (for example, in the range of from about 10 to about 13 or from about 10 to about 12) and usually more than about 11 (for example, in the range of from about 11 to about 14).

The present inventors have found that currently available containers for storing difficult to store compositions, such as hair dye, are not suitable for this purpose. This is because the containers have superfluous superstructures and require excess material to make sure that there is no leakage, delamination or access of oxygen. Thus, the inventors of the present invention sought an alternative material for forming a container that minimizes the amount of necessary component materials to reduce cost, while still providing an efficient container.

The authors of the present invention have found that it is possible to achieve this effect using an inner layer of polyethylene with an average density of 0.92-0.94 g / cm ³ . Preferably, the inner layer also has a thickness of 30 to 90 microns.

Polyethylene compositions for forming layers are well known in the art. In general, polyethylene is a thermoplastic polymer consisting of long chains of polymerized ethylene monomers. Polyethylene is classified into several different categories, based mainly on its density and branching. The mechanical properties of polyethylene depend significantly on variables such as the degree and type of branching, crystal structure and molecular weight. As examples of high density PE (HDPE) is determined by a density of more than or equal to 0.941 g / cm ³ . HDPE has a low degree of branching and thus stronger intermolecular forces and tensile strength. PE medium density (PESP) is determined by the density range of 0.926-0.940 g / cm ³ . Linear low density polyethylene (LLDPE) is determined by the density range of 0.915-0.925 g / cm ³ . LLDPE is mainly a linear polymer with a significant number of short branches, usually obtained by copolymerization of ethylene with short chain alpha olefins (e.g. 1-butene, 1-hexene and 1-octene). Low density polyethylene (LDPE) is determined by the density range of 0,910-0,940 g / cm ^3. LDPE has a high degree of short- and long-chain branching, which means that the chains do not pack into the crystal structure equally. This results in a low tensile strength and increased viscosity. Very low density polyethylene (PEONP) is determined by the density range of 0.880-0.915 g / cm ³ . Synthesis methods for preparing all of these compositions are well known in the art.

Preferably, the multilayer material has a total thickness of at most 240 microns, more preferably from 150 to 240 microns, more preferably from 200 to 240 microns, and most preferably from 225 to 235 microns. The inventors of the present invention have found that if the walls of the container are too thin, then the container seems unstable to the end user / consumer and will be unsuitable. Thus, end users prefer the container to have thicker walls. The preferred wall thickness reduces the amount of material required, while at the same time providing a satisfactory structure that meets the requirements of the consumer.

Preferably, the metal foil is an aluminum or aluminum alloy foil. Preferably, the metal foil layer is 5 to 30 microns, more preferably 5 to 20 microns, and more preferably 15 to 9 microns thick. This thickness provides sufficient strength to the container product and provides good rigid folding of the laminate with less than 240 microns of total thickness. Metal foil and, in particular, aluminum foil is expensive, therefore, a minimum suitable thickness of aluminum is used.

According to an alternative embodiment, the metal foil is an aluminum foil with a thickness of 20 to 30 microns. This increased thickness serves to improve the performance for rigid folding of the tube, albeit with an increase in the cost of the material.

The side of the metal foil barrier layer in contact with the product is provided with a polyethylene layer with an average density of 0.92-0.94 g / cm ³ and preferably a thickness of 30 to 90 microns. This layer is preferably in direct contact with the product. This layer is also preferably directly bonded to the metal foil layer with one bonding layer.

The expression “bonding layer” is a layer that is located between two layers in order to ensure that the two layers are connected to each other. Suitable materials for the binder layers are well known in the art. A preferred binder layer material is ethylene acrylic acid (EAA). A preferred binder layer has a thickness of from 20 to 40 microns, more preferably about 30 microns.

Preferably, the inner layer of polyethylene is 30 to 90 microns thick, more preferably 30 to 70 microns thick, more preferably 35 to 60 and most preferably 35 to 45 microns thick. Thus, the thickness of the laminate from the inner surface to the barrier layer of metal foil is minimized. This is preferable because it helps to reduce scalping. Scalping is an expression in the art for the transition of aromas and natural ingredients from a product to a polymer material forming a container. In the case of hair dye, the scalping effect can take the form of mandatory components of the composition, present only in small quantities, which are absorbed in the polyethylene. Using a thinner layer and also using a denser polyethylene layer helps to reduce this unwanted loss of product components.

The inner layer of polyethylene has an average density of 0.92-0.94 g / cm ³ . This density is the choice of medium density polyethylene (PESP). Preferably, the average density of the inner layer is from 0.930 to 0.938 g / cm ³ . More preferably, the average density of the inner layer is from 0.932 to 0.936 g / cm ³ , for example, equal to 0.932 g / cm ³ . The inner layer can be formed either from one material from PESP, or from two or more layers with different densities, which provides an average density range. Thus, the inner layer may contain HDPE and / or LDPE. They can be mixed together or in combination with PESP. For example, a preferred inner layer is formed from a mixture of high density polyethylene (HDPE) and low density polyethylene (LDPE), for example, 75% LDPE (density 0.921) and 25% HDPE (density 0.965). Preferably, the inner layer consists of polyethylene.

The laminates for forming the inner layer according to the prior art are based on LDPE or very low density PE (PEONP). In fact, when forming a tube from a laminate according to the prior art, the inner layer must be subjected to two heat sealing operations. First, it is required to provide heat sealing of the “longitudinal seam” of the tube during production, in which the structure of the multilayer web is rolled into a cylinder and then joined together to form a continuous tube (which is subsequently cut in length). Secondly, after the tube is filled, it must be closed by heat sealing at the end of the tube. In this operation, the inside of the tube is heated and closed by clamping in a vice to which pressure is applied. The use of these low density polyethylene materials facilitates these two operations.

This allows for simple heat sealing of the tube into its container configuration. However, the inventors of the present invention have found that such laminates lead to undesirable levels of scalping, leakage, and air access if used in the presence of such difficult to store products. The inventors of the present invention have found that if HDPE is used instead, then the seals formed during the formation of the container are more likely to be damaged, and the advantages of the present invention are not observed.

Not wanting to be limited by any theory, the authors of the present invention found that the inner layer described in this document gives improved chemical resistance or reduced diffusion of the product compared to conventional layers of LDPE. As a result, there is a reduced risk of exposure to metal foil on the contact surface and reduced diffusion of oxygen into the product. In addition, there is acceptable reverse absorption and low cost.

"Re-absorption" is a phenomenon observed in tubes made of plastic-containing materials. When the tube is squeezed, the plastic undergoes elastic deformation, and when the tube is released, the plastic material will tend to return to its original shape. This will create a pressure drop inside the tube, and as a result, by the area of the tube opening, the product is sucked back into the tube, followed by air if the reverse suction is strong enough to free the area of the hole. Re-absorption of air into the container can cause oxidation and spoilage of any product in it. The presence of a partial vacuum in the container may facilitate the access of oxygen through the seals that form the container.

Preferably, the bonding layer adheres the inner layer to the metal foil barrier layer.

Unexpectedly, the use of one inner (PESP type) layer is preferred. The use of one relatively thin bonding layer is also preferred. Therefore, the amount of soft polymer (binder layer material) on the inner side of the surface is reduced. Logically, one would expect that soft material was an advantage, since the “soft” layer spreads during the formation of the seal and serves to protect the open end of the metal foil from corrosion caused by the product. The trimmed edge is a known sensitive area. Unexpectedly, the inner layer disclosed herein has been found to be sufficient for this purpose.

Preferably, the laminate further comprises an outer layer on a second side of the surface of the metal barrier layer, wherein the outer layer provides a printable surface. Having a printable outer layer is important to facilitate labeling and marketing of the product. A preferred printable layer comprises one or more layers of polyethylene adhered by a bonding layer to a metal foil barrier layer. Preferably, the outer layer comprises a coextruded film of LDPE and HDPE. Most preferably, the outer layer is white or, at most, slightly colored to increase the visibility of the subsequent printed image. Preferably, the outer layer consists of polyethylene.

Regarding the outer layer on the second side of the surface of the metal foil barrier layer, the composition and shape of this layer are not critical to the present invention. However, the outer layer serves to protect the foil layer from physical impact, to provide the volume or body of the film, and to provide graphic images, colors, and other forms of printing. According to a preferred embodiment, a printed image and / or text is provided on the outer layer.

The inventors have found that it is desirable for the outer layer to have a thickness of 100 to 180 microns, more preferably 120 to 130 microns. The outer layer is preferably attached to the metal foil barrier layer by a bonding layer. The binder layer is preferably 10 to 30 microns thick and most preferably about 20 microns thick.

In one embodiment, the outer layer may comprise a filler. Preferred fillers include calcium carbonate. The presence of a filler - calcium carbonate serves to improve the performance for rigid folding without unnecessarily increasing the cost of production. The use of fillers, suitable amounts and techniques for incorporating fillers into polyethylene layers are well known in the art. Preferably, the filler is added to the body of the outer layer located at a distance from the outer surface of the multilayer material.

A particularly preferred multilayer material for forming a flexible container for storing hair dye has a central barrier layer of aluminum foil. The aluminum foil barrier layer has on the first side (the side facing the product) an inner layer glued with one bonding layer (25-35 microns). The inner layer contains polyethylene and has a thickness of from 35 to 45 μm and an average density of from 0.93 to 0.938 g / cm ³ . The aluminum foil barrier layer has an outer layer on the second side (consumer side) containing an external white film coextruded from LDPE / HDPE, 85-95 microns on a 35-45 micron LDPE layer, adhered to the aluminum foil barrier layer one bonding layer of 15-25 microns. The aluminum foil barrier layer is preferably 10 to 15 microns. The laminate has a total thickness of approximately 230 microns. More preferably, the multilayer material consists of the above layers and no others.

According to a preferred embodiment, the inner layer is 75% LLDPE (linear LDPE) Dowlex 3010 ™, 25% HDPE Dow 8007 ™; the bonding layers are Dow Primacor 3330 ™ EAA; the outer layer is LDPE Equistar NA204-000 ™.

The second object of the present invention is a container for storing hair dye, while the container contains a multilayer material described in this document. Laminate is used to form the container body. Preferably, the container is in a shape similar to a tube for toothpaste, although the total volume of the tube is preferably less than for a standard tube for toothpaste, i.e. a volume sufficient for 25-100 ml of the product.

A third aspect of the present invention is a container for a hair dye, comprising a container described herein and containing a hair dye. Hair dyes are well known and the container should retain any suitable hair dye.

A fourth aspect of the present invention is a toothpaste tube containing the multilayer material described herein and containing a dentifrice. The configuration of this tube is particularly preferred for storing toothpaste compositions or toothpaste formulations containing tin fluoride sensitive to the action of air and / or moisture. Tin fluoride is well known to react with aluminum foil at any unprotected edge and / or by diffusion through the inner layer. Toothpastes (a dentifrice) are well known, and the container should retain any suitable toothpaste.

Preferably, the above containers are single use containers. However, it is known that even for single-use packaging, some consumers will try to distribute the product into at least two uses, with hours or even days elapsing between each use. Advantageously, reducing back absorption and improving rigid folding can allow consumers to make several applications without oxidizing the composition and loss of product quality between uses. That is, the compressed container remains substantially compressed and thus the air will not be significantly sucked back into the tube or container. Preferably, however, the container is a reusable container. Such containers are suitable for use in hairdressing salons or, for example, for use with toothpastes (dentifrices). Minimizing reverse absorption allows you to save the product without oxygen and in optimal condition.

A fifth aspect of the present invention is a method for forming a container, the method comprising folding the multilayer material described herein into the desired configuration and heat sealing the overlapped edges to form the container. Techniques for forming such containers are well known in the art, for example, EP 0321172 discloses a technique for forming containers, including tubes for toothpaste.

A sixth aspect of the present invention is the use of a multilayer material, as described herein, for forming a hair dye container or toothpaste tube.

The present invention will now be further described with reference to the accompanying drawings provided by way of example, in which:

1 shows a conventional compressible tube suitable for storing a hair dye or toothpaste composition. The body of the tube is formed of a laminate with an aluminum barrier layer. One end is provided with a protrusion and a lid, the end was closed with undulating parallel folds. The depicted tube was delaminated at the fold (longitudinal sealing), and the staining is obvious (lower right part of the figure)

Figure 2 shows the end of a conventional compressible tube suitable for storing a hair dye or toothpaste composition. The tube shown allowed stratification on the final wave-like parallel folds, and the staining is obvious (lower left part of the figure)

figure 3 shows a schematic diagram of the layers that form the laminate according to the present invention,

Figure 4 shows a sketch of the lap joint that is formed when the tube (10) is made of laminate. The aluminum ends (15) of the aluminum foil are overlapped to form an overlapped section (20). Some excess material is squeezed out on top of the overlapped section 20 to form a polymer “spreading” section (25). Advantageously, this portion protects the inner aluminum end from corrosion due to contact with the contents of the tube.

A preferred laminate will now be described with reference to FIG. 3. The aluminum foil (1) is provided with a layer (2) of PESP on the first side to form the inner side when forming the tube. The PESP layer (2) is attached by a bonding layer (3). On the outside, the film (5) coextruded from LDPE / HDPE is glued to the aluminum foil (1) by a layer (4) of LDPE and a bonding layer (3). The total thickness of the layer is 229 microns, including: 13 microns of aluminum foil (1), 41 microns of the PESP layer (2) glued with a 28 micron adhesive layer (3); 89 microns coextruded from LDPE / HDPE film (5), glued with 38 microns of layer (4) of LDPE and 20 microns of the binder layer (3).

Preferably, the PESP layer (2) is 75% LLDPE (linear LDPE) Dowlex 3010 ™, 25% HDPE Dow 8007 ™; the bonding layers (3) are Dow Primacor 3330 ™ EAA; the LDPE layer (4) is an Equistar NA204-000 ™ LDPE.

The result of the present invention is demonstrated by the following non-limiting examples.

Tubes of this disclosure and comparative tubes of ordinary multilayer material were made and tested by direct contact with aggressive products - hair dye (commercial products purchased on store shelves or various brands and compositions). This included obtaining tubes from various studied canvases (multilayer materials), filling the tubes with a hair dye product, sealing them and storing them for up to 3 months at 45 ° C. At various time periods, tubes were received, cut and emptied. The inside of the tubing webs was evaluated for corrosion by visual inspection; those. adhesion of the longitudinal seam, analysis with copper sulfate to detect bare aluminum, the integrity of the seam at the end.

It was found that conventional tubes obtained with an inner layer of LDPE were unsatisfactory due to the access of oxygen to the tube either in the longitudinal seam or in the seam at the end of the tube. These are two areas where there is little or no overlap of the aluminum foil of the canvas, and they form two "weak zones" where protection is provided only by the polymer. LDPE, as it turned out, allows too much oxygen to move into the tube, causing catastrophic oxidation of the composition of the hair dye and the subsequent change in color of the composition.

In contrast, the tubes of the present disclosure reinforce these weak zones and reduce the rate of oxygen diffusion. Therefore, improved composition protection was observed. The transition to PESP of a specific density is carried out to provide improved protection, sufficient, at least, to undergo testing procedures for product compliance.

Re-absorption of the tube according to this invention and the comparative tube was also tested. This was done using a water column apparatus. The tubes were half empty, connected to the water column, while still being compressed, and then the tube was released. A conventional web showed a reabsorption of 60 mm of water (tube diameter 0.7 mm), a web according to the invention showed a reabsorption reduced by 50%, i.e. 30 mm

Material costs were also comparable, and it was found that a decrease in web thickness, decreasing from 280 (comparative) to 230 μm (according to the invention), led to an 18% reduction in the use of the material.

Tubes were also obtained with a web (multilayer material) according to the present invention, except that the inner layer was LDPE instead of PESP. They were tested in the same way and showed damage due to oxidation of the composition of the hair dye in two weak zones, i.e. areas of end sealing and longitudinal seam. This is observed by discoloration of the composition of the hair dye and the movement of the product - hair dye through these areas to the outside, leading to visible discoloration of the tube. In general, this discoloration, visible on the outside of the tube, is mainly a phenomenon visible in the longitudinal seam, and not the seam at the end.

The laminate according to the present invention is chemically compatible with hair dye (aggressive, the pH of the product is approximately 12, oxidizable), eliminates the access of oxygen to the container, which can lead to oxidation of the composition and a significant change in color, has a minimum thickness to reduce the cost in the market, which is very sensitive to price changes. In addition, the authors of the present invention found that the laminate significantly reduces the "reverse absorption" in the tube, which otherwise can cause the destruction of the composition of the hair dye by oxidation.

When introducing the elements of the present disclosure or their preferred embodiments, the singular and the expression "indicated" are intended to indicate the presence of one or more elements. The expressions “comprising”, “including” and “having” are intended to be inclusive and mean that there may be additional elements other than the listed elements.

The foregoing detailed description has been provided for the purpose of explanation and illustration, and is not intended to limit the scope of the appended claims. Many of the options in the available preferred embodiments illustrated herein will be apparent to those skilled in the art and remain within the scope of the appended claims and their equivalents.

Claims (19)

1. A multilayer material for forming a flexible container, where the multilayer material has a first surface, which when used forms the inner surface of the container, and a second surface, which in use forms the outer surface of the container, the multilayer material comprising an inner layer, an outer layer and an intermediate barrier layer metal foil, with the inner layer on the first side of the surface of the barrier layer of metal foil, and the outer layer on the second second side surface of the barrier layer of metal foil, the laminate has a total thickness of at most 240 microns and the inner layer contains polyethylene and has an average density of 0,92-0,94 g / cm ^3. 2. The multilayer material according to claim 1, in which the inner layer has a thickness of from 30 to 90 microns. 3. The multilayer material according to claim 1, in which the inner layer has a thickness of from 35 to 40 microns. 4. A multilayer material according to any one of claims 1 to 3, in which the average density of the inner layer is from 0.930 to 0.938 g / cm ³ . 5. The multilayer material according to any one of claims 1 to 3, in which the multilayer material has a total thickness of 225 to 235 μm. 6. The multilayer material according to any one of claims 1 to 3, in which the bonding layer glues the inner layer with a barrier layer of metal foil. 7. The multilayer material according to any one of claims 1 to 3, in which the inner layer contains high density polyethylene and / or low density polyethylene. 8. The multilayer material according to any one of claims 1 to 3, in which the outer layer provides a printable surface. 9. A container for storing hair dye containing a multilayer material according to any one of claims 1 to 8. 10. The container according to claim 9, which is a reusable container. 11. The container according to claim 9, which is a single-use container. 12. A container for a hair dye containing a container according to claim 9 and a hair dye. 13. The container of claim 12, which is a reusable container. 14. The container according to item 12, which is a single-use container. 15. A container for toothpaste containing a multilayer material according to any one of claims 1 to 8 and a means for brushing your teeth. 16. The container according to clause 15, which is a reusable container. 17. The container according to clause 15, which is a single-use container. 18. A method of forming a container, the method comprising bending the multilayer material according to any one of claims 1 to 8 to the desired configuration and heat sealing the overlapped edges to form the container. 19. The use of the multilayer material according to any one of claims 1 to 8 for forming a container for hair dye or a container for toothpaste.

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