BR112013020505B1 - LAMINATED MATERIAL TO FORM A FLEXIBLE CONTAINER, CONTAINER TO HOLD A DYE FOR HAIR, CONTAINER FOR HAIR DYE, CONTAINER FOR TOOTH PASTE, METHOD OF FORMING A CONTAINER AND USE OF LAMINATED MATERIAL - Google Patents

Abstract

LAMINATED MATERIAL SUITABLE FOR FORMING CONTAINERS It is a laminated material to form a flexible container to retain a hair dye or similar, the laminated material having a first surface that, in use, forms the inner surface of the container, and a second surface which, in use, forms the outer surface of the container, the laminated material comprising an inner layer, an outer layer and an intermediate metal sheet barrier layer, the inner layer being on the first surface side of the barrier layer. sheet metal, and where the outer layer is on the second surface side of the sheet layer barrier layer, where the laminated material has a total thickness of at most 240 (mi) m, and where the inner layer comprises polyethylene and has an average density of 0.92 to 0.94 g / cm3.

Description

Laminate

[001] This invention relates to the field of aluminum barrier laminates (GLA). Specifically, the present invention relates to a laminate material suitable for forming containers that can store chemical compositions ("hard to refer" micas, such as hair dye.

Aluminum barrier laminates (GLA) are well known for use in forming tubes and containers suitable for many products, such as toothpaste, foods, creams and various skin care and cosmetic formulations. However, some products can be corrosive. As a consequence, the aluminum needed for the excellent barrier properties it provides needs to be protected from the product. Permanent hair dye formulas are good examples and considering that they can be stored in aluminum tubes with an internal protective varnish reinforcement coating they are not suitable for standard laminated tubes (GLA). In such products, the corrosive formulation can actually penetrate by diffusion through the layers of internal polymer applied to protect the aluminum sheet of the GLA and attack the interfacial joints. The attack on the joints can cause the delamination of the laminated material, failure of the overturned seal and subsequent failure of the packaging.

[003] For several reasons, including market pressure and cost considerations, it is desirable to be able to store hair dye in laminated GLA tubes and this is an objective of the present invention.

[004] To obtain a GLA laminated tube, it is essential to meet two key requirements, namely, that the product (1) does not leak from the container before being used by the consumer and (2) does not have any other contact with the atmosphere before the use. Hair dye, for example, is highly sensitive to air and corrosive (often having a pH of around 12). If the hair dye is left in the air then it oxidizes to a dark black and is unpleasant to consumers and, above all, it stops working optimally.

[005] With only these limitations in mind, it would be possible to design a robust container for such products. However, due to the relatively low value of the containers and their disposable nature, it is essential that the containers do not require expensive materials or complicated manufacturing processes. In fact, for single-use containers, it is particularly desirable to minimize the use of unnecessary or expensive packaging materials.

[006] Therefore, it is desired a laminated material and containers that can overcome, or at least mitigate, part of or all the problems associated with the state of the art or at least provide a useful or optimized alternative.

[007] In a first aspect, the present invention provides a laminated material to form a flexible container for retaining a hair dye or the like, the laminated material having a first surface which, in use, forms the inner surface of the container, and a second surface which, in use, forms the outer surface of the container, the laminated material comprising an inner layer, an outer layer and an intermediate metal sheet barrier layer, the inner layer being on the first surface side of the metal sheet barrier layer, and the outer layer is on the second surface side of the metal sheet barrier layer, where the laminated material has a total thickness of at most 240pm, and where the inner layer comprises polyethylene and has an average density of 0.92 to 0.94g / cm3.

[008] The present invention will now be described further. In the following passages different aspects / modalities of the invention are defined in greater detail. Each aspect / modality thus defined can be combined with any other aspect I modality or aspects / modalities unless clearly indicated to the contrary. In particular, any aspect indicated as being preferred or advantageous can be combined with any other aspect or aspects indicated as being preferred or advantageous.

[009] As used herein, the terms "over", "external", "internal" and "under", and the like, used with respect to the various layers refer to the laminated material with the highest intended external surface and the desired internal (contact with the product) surface is lower. Furthermore, these terms and the term "no" "na" do not imply that the layers are necessarily in contact. For example, the inner layer being "formed in" the metal sheet barrier layer does not prevent the presence of one or more intervening layers located between the inner layer and the metal sheet barrier layer or additional layers provided under the inner layer (i.e., between the inner layer and the product).

[0010] The term “container” is used here to refer to an item that can confer a product. Such products are usually liquids, gels or pastes. Preferred containers include tubes and bags. The container may also comprise a lid, if necessary, a fastening device for the lid (as such as a shoulder) before forming a useful commercial container. Such components are well known in the art. However, the term is used herein to refer to the body of the container that contains and contacts the commercial product. Preferably the container is for retaining hair dye.

[0011] The term "flexible" as used here describes the container that can tilt or be easily tilted and that breaks (unless it is too tilted). Here, with respect to containers, the flexible term indicates that if the container is subjected to a force, for example, being filled 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 a container "with flexible pressure".

[0012] The term "dead fold" is a term in the state of the art and is used here to refer to the laminate's ability to permanently retain its shape once it is folded or wrinkled and does not return to an undeveloped or wrinkled state . As an example, the aluminum foil sheet, once folded or shaped around an item, retains its shape and, therefore, can be considered to have excellent dead-fold characteristics. Conversely, typical piastico food wrappers tend to quickly rewind, unfold or unwind after being molded around an item. This is an excellent example of weak dead-fold characteristics. As the laminated material comprises a sheet and layers of piastico, the dead fold property will be between these ends.

[0013] The tube of the present invention is especially suitable for retaining "difficult to retain" or "aggressive" compositions. They include hair dyes (or hair dye), are chemically reactive and generally contain one or more acidic, basic and / or oxidizing ingredients. These ingredients generally fall into the chemical classes of inorganic hydroxides, inorganic halides and peroxides. Inorganic hydrexides include ammonia hydroxide as well as alkali and alkaline earth metal hydroxides (for example, potassium hydroxide and calcium hydroxide). Inorganic halides include fluorides, chlorides, bromides and iodides of ammonia 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 (carbamide), and alkali and alkaline earth metal peroxides (for example, sodium peroxide). Representative aggressive products are endowed with pH values lower than around 4 (for example, in the range from 1 to around 4, or from 1 to around 3) or on the other hand the values pH values greater than around 9 (for example, in the range from 10 to around 13, or from 10 to around 12), and frequently greater than around 11 (for example, in the range from 11 to 14).

[0014] It has been discovered that the containers available at the moment to retain components that are difficult to retain, such as hair dye, are not suitable for the purpose. This is due to the fact that the containers are very elaborate and require a lot of material to ensure that there is no leakage, delamination or oxygen entry. Therefore, an alternative material was researched to form a container that minimizes the amount of material components needed to reduce cost, while still providing an effective container.

[0015] It has been discovered that it is possible to achieve this effect by using an inner layer of polyethylene with an average density of 0.92 to 0.94g / cm3. Preferably the inner layer is also provided with a thickness of around 30 to 90 pm.

[0016] Polyethylene compositions for forming layers are well known in the art. In general, polyethylene is a thermoplastic polymer that consists 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 extent and type of branching, the crystal structure and the molecular weight. By way of examples; High density PE (HDPE) and defined by a density greater than or equal to 0.941 g / cm3. HDPE has a low degree of branching and, therefore, stronger intramolecular forces and tension forces. Medium density PE (MDPE) is defined by a density range from 0.926 to 0.940 g / cm3. Linear low density polyethylene (LLDPE) is defined by a density variation from 0.915 to 0.925 g / cm3. LLDPE is a substantially linear polymer with significant numbers of interesting branches, commonly made by copolymerizing ethylene with short-chain alpha olefins (for example, 1-butene, 1-hexene and 1-octene). Low density polyethylene (LDPE) is defined by a density range from 0.910 to 0.940 g / cm3. LDPE has a high degree of short and long chain branching, which means that the chains also do not compress in the crystal structure. This results in a lower voltage strength and increased malleability. Very low density polyethylene (VLDPE) is defined by a density variation from 0.880 to 0.915 g / cm3. Synthetic methods for producing all of these compositions are well known in the art.

[0017] Preferably, the laminated material has a total thickness of at most 240 pm, more preferably from 150 to 240 pm, more preferably from 200 to 240 pm and most preferably from 225 to 235 pm. It has been discovered that if the walls of the container are too thin then the container feels fragile for the end user / consumer and will not be acceptable. Therefore, end users prefer that the container has thicker walls. The preferred wall thickness reduces the amount of material required while providing sufficient structure to serve the consumer.

[0018] Preferably, the metal sheet is an aluminum or aluminum alloy sheet. Preferably, the metal sheet layer is 5 to 10 microns, preferably 5 to 20 microns and more preferably 15 to 9 microns thick. The thickness provides sufficient strength for the product in the container and provides a good dead fold in the present laminate less than 240 pm in total thickness. The metal sheet and, in particular, the aluminum sheet is expensive, so that the minimum thickness required of aluminum is employed.

[0019] In an alternative embodiment, the metal sheet and an aluminum sheet with a thickness of 20 to 30 microns. This increase in thickness serves to improve the characteristics of dead pipe bending, while increasing the material cost.

[0020] The product contact side of the metal sheet barrier layer is provided with a polyethylene layer with an average density of 0.92 to 0.94 g / cm3 and preferably a thickness of 30 to 90 pm. This layer is preferably in direct contact with the product. This layer is also preferably directly adhered to the sheet metal layer with a single bonding layer.

[0021] The term “bonding layer” is a layer that is placed between two layers in order to ensure that the two layers are joined together. Suitable materials for bonding layers are well known in the art. A preferred bonding layer is ethylene acrylic acid (EEA). A preferred bonding layer is 20 to 40 microns thick, more preferably around 30 microns.

[0022] Preferably, the inner layer of polyethylene is 30 to 90 microns thick, more preferably 30 to 80 microns thick, more preferably 35 to 60 microns and most preferably 35 to 45 microns thick. Therefore, the thickness of the laminate from the inner surface to the sheet metal barrier layer is minimized. This is advantageous because it helps to reduce “scalping”. "Scalping" is a term in the technique for the loss of aromas and natural ingredients of a product in the polymeric material that forms a container. In the case of hair dye, the "scalping" effect can take the form of indispensable formulation components present only in small amounts that are absorbed into the polyethylene. The use of a thinner layer and also the use of a denser polyethylene layer helps to reduce this undesirable loss of product components.

[0023] The inner layer of polyethylene has an average density of 0.92 to 0.94 g / cm3. This density is a selection of Medium Density Polyethylene (MDPE). Preferably, the average density of the inner layer is from 0.930 to 0.938 g / cm3. More preferably, the average density of the inner layer is from 0.932 to 0.936 g / cm3, for example, equal to 0.932 g / cm3. The inner layer can be formed of a single MDPE material or of two or more layers with different densities that provide the variation of average density. Therefore, the inner layer can comprise HSPE and / or LDPE. This can be a mixture together or in combination with MDPE. 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 (0.921 density) and 25% HDPE (density 0.965). Preferably the inner layer consists of polyethylene.

[0024] State-of-the-art laminates rely on LDPE or a lot of LDPE (VLDPE) to form the inner layer. In fact, when forming a tube from the prior art laminate, the inner layer must be subjected to two thermal sealing operations. First, it is necessary to allow the thermal sealing of the "side splice" of the tube during manufacture, where the multilayer weft structure is rolled into a cylinder and then spliced together to form a continuous tube (which is subsequently cut to length). Second, after the tube is filled, it needs to be thermally sealed at the end of the tube. In this operation, the inner part of the tube is heated and closed by clamping by pressure-applied spots. The use of these lower density polyethylene materials favors these two operations.

[0025] This allows for simple thermal sealing of the tube in its container configuration. However, it has been found that such laminates lead to unwanted levels of scalping, leakage and oxygen uptake when used in the presence of two products that are difficult to retain. It has been found that if HDPE is used, then the seals formed when forming the container are more prone to failure and the advantages of the present invention are not seen.

[0026] Without wishing to be limited by theory, it was discovered that the inner layer described here improves the chemical resistance or reduces the diffusion of the product compared to conventional LDPE layers. As a consequence, there is a reduction in the risk of attack of the metal sheet at the interface and a reduction in the diffusion of oxygen in the product. In addition, there is an acceptable “low suction” and low cost. “Sucgao” is a phenomenon observed in tubes made with plastic that contains materials. When the tube is compressed the plastic is subjected to elastic deformation and when the tube is released the plastic material will try to return to its initial shape. This will create a pressure drop inside the tube and as a result the product in the orifice area of the tube is sucked back into the tube, followed by air if the suction is high enough to empty the orifice area. The suction of air into the container can cause any product in the container to oxidize and perish. The presence of a partial vacuum in the container can encourage the entry of oxygen through the seals that form the container.

[0027] Preferably a bonding layer adheres the inner layer to the metal sheet barrier layer.

[0028] The use of a single layer of relatively thin bonding is also preferred. Consequently, the amount of soft polymer (bonding layer material) on the side of the inner surface is reduced. Of course, it could have been expected that the soft material would be an advantage because the "soft" layer flows outward to form a fence and serves to protect the exposed end of the metal sheet from corrosion caused by the product. The cutting edge is a known sensitive region. Surprisingly, it has been found that the inner layer described here is sufficient for this purpose.

[0029] Preferably the laminated material also comprises an outer layer on the side of the second surface of the metal barrier layer, the outer layer providing a printable surface. The presence of a printable outer layer is essential to help brand and sell the product. A preferred printable layer comprises one or more layers of polyethylene, one or more layers of polyethylene suitable with a layer of bonding to the metal sheet barrier layer. Preferably, the outer layer comprises a coextruded LDPE and HPDE film. Most preferably the outer layer is white, or at most slightly colored, to increase the visibility of the subsequent print. Preferably the outer layer consists of polyethylene.

[0030] With respect to the outer layer on the side of the second surface of the sheet metal barrier layer, the composition and shape of this layer are not critical to the present invention. However, the outer layer serves to protect the sheet layer from physical abuse, to provide volume or body to the film, and to support graphics, color, and other forms of printing. In a preferred embodiment, the outer layer is provided with a printed image and / or text.

[0031] It has been 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 preferably adheres to the metal sheet barrier layer with a bonding layer. The bonding layer is preferably 10 to 30 microns thick and more preferably around 20 microns thick.

[0032] In one embodiment, the outer layer may comprise a filler. Preferred fillers include calcium carbonate. The presence of a calcium carbonate filler serves to perfect the characteristics of the dead fold without unduly increasing the cost of manufacture. The use of fillers, suitable amounts and techniques to include fillers in polyethylene layers are well known in the art. Preferably the filler is added within the body of the outer layer, away from the outer surface of the laminated material.

[0033] A laminate material especially preferred to form a flexible container for retaining a hair dye has a central aluminum foil barrier layer. The aluminum foil barrier layer has on the first side (side facing the product) an inner layer that is adhered with a single bonding layer (25 to 35 microns). The inner layer comprises polyethylene and has a thickness of 35 to 45 pm and an average density of 0.93 to 0.938 g / cm3. The aluminum foil barrier layer has on a second side (consumer side) an outer layer comprising a 85 to 95 micron LDPE / HDPE coextruded white external film in a 35 to 45 micron LDPE layer, adhered the aluminum foil barrier layer with a single bonding layer of 15 to 25 microns. The aluminum foil barrier layer is preferably 10 to 15 microns. The laminated material has a total thickness of around 230 microns. Most preferably the laminated material consists of the preceding layers and none other.

[0034] In a preferred embodiment the inner layer is 75% LLDPE Dowlex TM (linear LDPE), 25% HDPE Dow 8007 TM; the connecting layers are EEA Dow Primacor 3330 TM; the outer layer and LDPE Equistar NA204-000 TM.

[0035] According to a third aspect, the present invention provides a container for retaining a hair dye, the container comprising the laminated material described herein. The laminated material is used to form the body of the container. Preferably the container is in the form that resembles a toothpaste tube, although the total volume of the tube is preferably less than a standard toothpaste tube, i.e., sufficient volume for 25 to 100 ml of the product.

[0036] According to a fourth aspect, the present invention provides a hair dye container comprising the container described herein and containing hair dye. Hair dyes are well known and the container should retain any suitable hair dye.

[0037] In accordance with a fifth aspect, the present invention provides a tube of toothpaste comprising the laminated material described herein and containing toothpaste. The design of the present tube is particularly advantageous for retaining toothpaste compositions sensitive to air or moisture, or toothpaste formulations containing tin fluoride. Tin fluoride is well known for reacting with the aluminum foil on any unprotected edges and / or via diffusion through the inner layer. Toothpastes (toothpastes) are well known and the recipient must retain any suitable toothpaste.

[0038] Preferably the previous containers are single use containers. However, it is known that even for single packaging, certain consumers will try to extend the product for at least two applications, with hours or even days between each use. Advantageously, the reduction in suction and the improvement of dead fold can help to allow consumers to make several applications without oxidation of the formula and loss of product performance between uses. That is, the compressed container will remain highly compressed and, consequently, air will not be significantly sucked into the tube or container. Preferably, however, the container is a multipurpose container. Such containers are useful for use in a professional salon or, for example, for use with toothpaste (toothpaste). The mini suction allows the product to be kept free of oxygen and in optimal conditions.

[0039] According to a sixth aspect, the present invention provides a method of forming a container, the method comprising folding the laminated material described herein into a desired configuration and thermally sealing the overlapping edges to form the container. Techniques for forming such containers are well known in the art, for example, Document EP0321172 describes a technique for forming containers that includes toothpaste tubes.

[0040] In accordance with a seventh aspect, the present invention provides the use of the laminated material as described herein to form a hair dye container or a tube of toothpaste.

[0041] The present invention will now be described further with reference to the accompanying drawings, provided by way of example, in which:

[0042] Figure 1 illustrates a conventional compressible tube suitable for storing a hair dye or toothpaste composition. The tube body is formed from an aluminum barrier laminate. One end is provided with a shoulder and a lid, the end has been folded closed. The described tube was subjected to delaminating in the fold (longitudinal fence) and the coloring is evident (bottom right of the drawing).

[0043] Figure 2 illustrates the end of a conventional compressible tube suitable for storing a hair dye or toothpaste composition. The tube described was subjected to delaminating at the end fold and coloring is evident (bottom left of the drawing).

[0044] Figure 3 illustrates a schematic diagram of the layers that form the layer of the present invention.

[0045] Figure 4 shows a sketch of the overlap joint formed when a tube (10) is made from a laminate web. The aluminum ends (15) of the aluminum sheet are overlapped to form an overlapping region (20). Some excess material is expressed out of the overlapping region 20 to form the polymer "flow" region (25). Advantageously, this region protects the most reconditioned aluminum end from corrosion by contact with the contents of the tube.

[0046] A preferred laminate will now be described with reference to Figure 3. The aluminum foil (1) is provided with an MDPE layer (2) on a first side to form the inner side when forming a tube. The MDPE layer (2) is fixed with a bonding layer (3). On the external side, an LDPE / HDPE film is extruded (5) and adhered to aluminum foil (1) with an LDPE layer (4) and a bonding layer (3). The total thickness of the layer is 229 microns, comprising 13 microns of aluminum foil (1), 41 microns of MDPE layer (2) adhered with a 28 micron bonding layer (3); 89 microns of LDPE / HDPE coextruded film (5) adhered with 38 microns of LDPE layer (4) and 20 microns of bonding layer (3).

[0047] Preferably the MDPE layer (2) and 75% LLDPE Dowlex TM (LDPE li-near), 25% HDPE Dow 8007 TM; the connecting layers (3) are EEA Dow Primacor 3330 TM; the LDPE layer (4) and Equistar NA204-000 TM LDPE.

[0048] The effect of the present invention is demonstrated by the following non-limiting examples.

[0049] The tubes of this description and the tubes of conventional laminated material comparatives were made and tested by direct contact with aggressive hair dye products (commercial products purchased from store shelves or various brands and compositions). This involved manufacturing the tubes with various tested wefts (laminated materials), filling the tubes with the hair dye product, sealing them and storing for up to 3 months at 45 ° C. In several periods of time the tubes were extracted, cut open and emptied. The inner part of the tube wefts was evaluated for corrosion by visual observation, that is, adhesion of the lateral splice, analysis of copper sulfate to reveal bare aluminum, integrity of extremity splice.

[0050] It was discovered that the conventional tube made with an inner layer of LDPE was a failure for oxygen to enter the tube or the side seam or the end seam of the tube. These two regions where there is little or no overlap of the aluminum foil of the weft constitute two “weak zones” where the protection is provided only by the polymer link. LDPE appears to allow too much oxygen to migrate into the tube causing catastrophic oxidation of the hair dye formula and subsequent change in the color of the formula.

[0051] In comparison, the tubes of the present description reinforce these weak zones and allowed a lower rate of oxygen diffusion. Consequently, improved protection of the formula was observed. The deviation for specific density MDPE appears to provide better protection, sufficient at least to pass product compatibility testing procedures.

[0052] The suction of the inventive tube and the comparative tube was also tested. This was done with a water column device. The tubes were emptied halfway, connected to a water column although still compressed. The conventional web showed a suction of 60 mm of water (tube diameter of 0.7 mm), the inventive web showed a reduction of 50% of suction, ie, 30 mm.

[0053] Material costs were also compared and it was found that reducing the web thickness from 280 (comparative) to 230 pm (inventive) resulted in an 18% reduction in material usage.

[0054] Tubes with the weft (laminated material) of the present invention were also produced except that the inner layer was LDPE instead of MPDE. They were tested in the same way and showed failure due to oxidation of the hair dye formula in the two weak zones, that is, the end seal and the splice areas. This was observed by the discoloration of the hair dye formula and migration of the hair dye product through these regions outwards, leading to visible discoloration of the tube. In general, this discoloration seen on the outside of the tube is predominantly a crack seen on the side seam and not on the end seam.

[0055] The laminate of the present invention is chemically compatible with hair dye (aggressive, product pH of approximately 12, oxidizer), eliminates the entry of oxygen into the container which can result in oxidation of the formula and significant color change, has a minimum thickness to reduce cost for a market that is very cost sensitive. In addition, it has been found that the laminate greatly reduces “suction” into the tube which otherwise causes the hair dye formula to degrade by oxidation.

[0056] When introducing the elements of this description of the preferred modality (s) of the same, the articles "one", "o" and "said" are intended to mean that there is one or more of the elements. The terms "comprising", "including" and "possessing" are intended to be inclusive and mean that there may be additional elements other than those listed.

[0057] The detailed description mentioned above has been provided by way of explanation and illustration, and is not intended to limit the scope of the attached claims. Many variations in the presently preferred modalities illustrated herein will be clear to one skilled in the art, and remain within the scope of the appended claims and their equivalents.

Claims (15)

1. Laminated material to form a flexible container to retain a hair dye or the like, the laminated material having a first surface that, in use, forms the inner surface of the container, and a second surface that, in use, forms the surface outer profile of the container, the laminated material, CHARACTERIZED by the fact that it comprises an inner layer, an outer layer and an intermediate metal sheet barrier layer, the inner layer being on the first surface side of the sheet barrier layer of metal and adhered directly to the barrier layer of the intermediate metal sheet with a first bonding layer, and the outer layer is on the second surface side of the sheet barrier layer and directly adhered to the sheet barrier layer of intermediate metal with a second bonding layer, in which the laminated material has a total thickness of at most 240 pm, and in which the inner layer comprises polyethylene o e has an average density of 0.92 to 0.94 g / cm3 and the outer layer comprising one or more layers of polyethylene. 2. Laminated material according to claim 1, CHARACTERIZED by the fact that the inner layer has a thickness of 30 to 90 pm. 3. Laminated material according to claim 1 or 2, CHARACTERIZED by the fact that the inner layer has a thickness of 35 to 40 pm. Laminated material according to any one of claims 1 to 3, CHARACTERIZED by the fact that the average density of the inner layer is from 0.930 to 0.938 g / cm3. Laminated material according to any one of claims 1 to 4, CHARACTERIZED by the fact that the laminated material has a total thickness of 225 to 235 pm. 6. Laminated material according to any one of claims 1 to 5, CHARACTERIZED by the fact that a bonding layer adheres to the inner layer with the metal sheet barrier layer. 7. Laminated material according to any one of claims 1 to 6, CHARACTERIZED by the fact that the inner layer comprises HDPE and / or LDPE. 8. Laminated material according to any one of claims 1 to 7, CHARACTERIZED by the fact that the outer layer provides a printable surface. 9. Container for retaining a hair dye, the container CHARACTERIZED by the fact that it comprises the laminated material as defined in any one of claims 1 to 8. 10. Hair dye container, CHARACTERIZED by the fact that you buy the container as defined in claim 9, and that it contains hair dye. 11. Toothpaste container, CHARACTERIZED by comprises the laminated material as defined in any of claims 1 to 8, and confers dentifrice. 12. Container according to any one of claims 9 to 11, CHARACTERIZED by the fact that the container is a multipurpose container. 13. Container according to any one of claims 9 to 11, 5 CHARACTERIZED by the fact that the container is a single-use container. 14. Method of forming a container, the method CHARACTERIZED by the fact that it comprises folding the laminated material as defined in any of claims 1 to 8, in a desired configuration and thermally sealing the overlapping edges to form the container. 15. Use of the laminated material according to any one of claims 1 to 8, CHARACTERIZED by the fact that it is to form a container of hair dye or a tube of toothpaste.

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