Receptacle for a cosmetic composition, in particular hair care product, and method for manufacturing thereof

Abstract

The invention relates to a receptacle (1) for a cosmetic composition, in particular hair care product, comprising a wall (30) having at least two superimposed layers (31, 34), wherein the wall (30) includes - a first layer (31) having an inner surface and an outer surface providing an exterior surface of the receptacle (1); and - a second layer (34) disposed on the inner surface of the first layer (31), characterized in that the first layer (31) includes a thermoplastic polyolefin as a constituent at a percentage by mass between 25 wt% and 92 wt.% and the second layer (32) includes a low-density polyethylene as a constituent, wherein the low-density polyethylene included in the second layer (32) has a density between 0,91 g / cm3 and 0,93 g / cm3, in particular about 0,92 g / cm3, as determined according to ISO 1183-1:2019 (23°C). The invention also relates to a method for manufacturing the a receptacle (1).

Description

[0001] Wella GmbH Deutschland

[0002] Receptacle for a cosmetic composition, in particular hair care product, and method for manufacturing thereof

[0003] Technical field of the invention

[0004] The present invention generally relates to the field of receptacles for liquids, in particular cosmetic compositions like, for example, haircare products, made from polymers, in particular polyethylene, and methods of manufacturing thereof.

[0005] Background of the invention

[0006] Plastic is one of the most widely used materials in the world. The issue with plastic does not stem from its usage but rather from the management of its products at the end of their lifecycle. At present, only a small fraction of plastic is recycled or reused, with the majority ending up as waste in landfills or, worse, being improperly discarded in nature or reaching the oceans. This escalating issue has created an urgent need for the recycling and reuse of plastic items.

[0007] A significant challenge in recycling plastic products is the degradation of polymeric materials, such as polyethylene, during their initial use and subsequently during the recycling process. This degradation impacts material properties, including strength, elasticity, thermal and optical characteristics, and UV resistance of the recycled polymer. As a result, recycled polyethylene (and products made from recycled materials) is often of lower quality than virgin polyethylene. Additionally, the quality of polyethylene generally deteriorates with each recycling cycle.

[0008] Consequently, achieving identical mechanical, sealing, and aesthetic properties with recycled polyethylene compared to virgin polyethylene is difficult. This is particularly relevant for multilayer wall bottles produced through extrusion blow moulding, specifically using co-extrusion followed by blow moulding, which are designed to hold products like hair care formulations.In this context, receptacles comprising walls with layered structure were proposed. For example, WO 2024 / 126261 discloses a bottle having walls with layers composed of various materials. The layers are made from either recycled polyethylene, virgin polyethylene, or a combination of both recycled and virgin polyethylene.

[0009] Summary of the invention

[0010] It is an object of the present invention to provide a receptacle for a cosmetic composition is adapted to at least partially overcome the aforementioned disadvantages of the prior art. In particular, it is an object of the present invention to provide a receptacle that is adapted to convey an improved user experience. Even more particularly, it is an object to provide a receptacle that may, at least in parts, be manufactured from recycled polymers, in particular recycled polyethylene.

[0011] In one aspect of the invention, a receptacle for a cosmetic composition, in particular hair care product, is provided. The receptacle comprises a wall having at least two superimposed layers. The wall includes

[0012] a first layer having an inner surface and an outer surface; and

[0013] a second layer disposed on the inner surface of the first layer.

[0014] The outer surface of the first layer provides an exterior surface of the receptacle, in particular body portion of the receptacle. The second layer is disposed on the inner surface of the first layer. The first layer includes a thermoplastic polyolefin a constituent. The first layer includes the thermoplastic polyolefin at a percentage by mass between 25 wt.% and 92 wt.%. The second layer includes a low-density polyethylene as a constituent. The low-density polyethylene included in the second layer has a density between 0,91 g / cm3and 0,93 g / cm3, in particular about 0,92 g / cm3, as determined according to ISO 1183-1:2019 (23°C).

[0015] It was found that including thermoplastic polyolefin in the first layer at the given concentration results in receptacles having smooth exterior surfaces that convey apleasant tactile impression like velvet when touched by the consumer. In summary, the receptacle is configured to convey a soft, smooth tactile impression when touched.

[0016] The low-density polyethylene included layers or films of the receptacle, in particular in the second layer may be provided by a virgin resin or, preferably, a recycled resin to reduce the ecological footprint of the receptacle. The receptacle may in particular be manufactured by means of blow moulding, extrusion blow moulding or the like.

[0017] According to various embodiments of the invention, the first layer may have a thickness that accounts for 5% to 15%, in particular 10%, of an average thickness of the wall. The thickness of the wall is in particular determined by the dimension of the multi-layered wall in a lateral direction. The thickness of the first layer is preferably chosen to be relatively thin, in particular in such a manner that components included in the first layer do not prevent the recyclability of the receptacle in its entirety. Preferably, the first layer accounts to a total weight of the receptacle of 5%% to 15%, in particular 10%. Receptacles of this type can typically be recycled as whole without having to be mechanically separated into their constituting parts. In a possible embodiment, the second layer may have a thickness that accounts for 85% to 95%, in particular 90%, of an average thickness of the wall. Additionally, it was found that including low-density in the second layer allows for the provision of receptacles that are both sufficient stable to stay in shape and easily deformable by the consumer.

[0018] The relative thin outer first layer may be made from various resins, including virgin resins or recycled resins. In particular it is possible to use resins with lower structural performance properties like recycled resins. Optionally, additives may be used to create a decorative effect, like for example a pearly gloss effect. The first layer may also provide a cover and or improve the appearance of the second layer.According to various embodiments of the invention, the first layer includes a high-density polyethylene as a constituent, wherein the high-density polyethylene included in the first layer has a density between 0,94 g / cm3and 0,96 g / cm3, in particular about 0,95 g / cm3, even more particularly 0,953 g / cm3, as determined according to ISO 1183-2:2019 (23°C ± 1°C). The high-density polyethylene is preferably included in the first layer at a percentage by mass of less than 60 wt.%. The high-density polyethylene included in the first layer may in particular be provided by a virgin resin or, preferably, a recycled resin to reduce the ecological footprint of the receptacle. In other cases, virgin resin may be preferred for improved stability and / or structural performance.

[0019] Concentrations of constituents given as percentages by mass of a layer or film are to be determined with respect to the total mass of the respective layer or film. Ranges given throughout this disclosure are understood to include the specified boundaries.

[0020] According to various embodiments of the invention, the first layer may include a low-density polyethylene as a constituent, wherein the low-density polyethylene included in the first layer has a density between 0,91 g / cm3and 0,93 g / cm3, in particular about 0,92 g / cm3, as determined according to ISO 1183-1:2019 (23°C). The low-density is preferably included in the first layer at a percentage by mass of less than 60 wt.%. The low-density polyethylene included in the first layer may in particular be provided by a virgin resin or, preferably, a recycled resin to reduce the ecological footprint of the receptacle. In other cases, virgin resin may be preferred for improved stability and / or structural performance.

[0021] In principle, recycled resins and virgin resins may be mixed at any given ratio. In particular, the low-density or high-density polyethylene in any of the layers or films of the receptacle may exclusively be provided by a recycled resin or, respectively, a virgin resin.According to various embodiments of the invention, the first layer may include an adhesion promoter as a constituent. The adhesion promoter may in particular be included in the first layer at a percentage by mass of less than 6 wt.%.

[0022] According to various embodiments of the invention, the first layer may include a masterbatch as a constituent. The masterbatch may in particular be included in the first layer at a percentage by mass between 2 wt.% and 4 wt.%.

[0023] Throughout this disclosure, a masterbatch may relate to constituents, in particular including mixture of pigments, additives, and / or fillers, that are used to colour the plastic materials during the manufacturing process. The masterbatch may in particular be provided in granular form and added to other constituents at a given concentration to obtain a desired colour impression. The masterbatch may in particular be added to provide a colour impression different from the typically greyish colour impression provided by recycled resins, in particular polyethylene. In particular, the masterbatch can be included in the first layer for attaining a desired colour impression. The masterbatch may optionally also be included in the second layer, in particular in the intermediate film of the second layer to provide colour grounding.

[0024] In some embodiments of the invention, polyethylene, in particular low-density and / or high-density polyethylene, is excluded as a constituent of the first layer. In these embodiments, the first layer may comprise, in particular consist of, a thermoplastic polyolefin, an adhesion promoter and a masterbatch. The first layer may, for example, include the thermoplastic polyolefin, the adhesion promoter and the masterbatch, wherein

[0025] - the thermoplastic polyolefin is included in the first layer at a percentage by mass of 92 wt.%;

[0026] - the adhesion promoter is included in the first layer at a percentage by mass of 6 wt.%;

[0027] - the masterbatch may in particular included in the first layer at a percentage by mass of 4 wt.%.According to various embodiments of the invention, the second layer may comprise an inner film adapted to be exposed to the cosmetic composition contained in the receptacle and an intermediate film disposed between the inner film and the first layer. In other word, the wall includes three layers provided by the inner film, the intermediate film and the first layer. A relative thin inner film may in particular be provided for protective purposes. The inner film may include a high-performance plastic resin, which may either be virgin resin or recycled resin or a mixture thereof. The inner layer may be adapted to increase the structural performance of the receptacle and is made of resins compatible with the product.

[0028] The quality of the resins used in manufacturing the receptacle preferably relates to food grade or cosmetic grade resins.

[0029] The intermediate layer can be made from any kind of resin, in particular virgin resins and / or recycled resins.

[0030] According to various embodiments of the invention, the wall comprises several intermediate films or layers arranged between the inner film and the first layer.

[0031] According to various embodiments of the invention, the inner film may have a thickness that accounts for 15% to 25%, in particular about 20%, of an average thickness of the wall. According to various embodiments of the invention, the intermediate film may have a thickness that accounts for 65% to 75%, in particular about 70%, of the average thickness of the wall. The inner film provides a chemically stable, relative thin protective layer compatible with the liquid composition to be stored in the receptacle.

[0032] According to various embodiments of the invention, the low-density polyethylene of the second layer may be included in the intermediate film of the second layer. Low-density polyethylene may in particular be included in the intermediate film as a constituent at a percentage by mass between 15 wt.% and 30 wt.%.According to various embodiments of the invention, the intermediate film of the second layer may include a high-density or low-density polyethylene as a constituent.

[0033] Throughout this disclosure, polyethylene with a density of 0,94 g / cm3to 0,96 g / cm3, in particular about 0,95 g / cm3, as determined according to ISO 1183-2:2019 (23°C ± 1°C), may be considered as high-density polyethylene. Polyethylene with a lower density of 0,91 g / cm3to 0,93 g / cm3, in particular about 0,92 g / cm3, as determined according to ISO 1183-1:2019 (23°C) may be considered as low-density polyethylene.

[0034] According to various embodiments of the invention, high-density polyethylene may be included in the intermediate film at a percentage by mass between 60 wt.% and 80 wt.%.

[0035] According to various embodiments of the invention, the inner film of the second layer includes a low-density polyethylene as a constituent, The low-density polyethylene is preferably included in the inner film at a percentage by mass of up to 100 wt.%.

[0036] According to various embodiments of the invention, the intermediate film of the second layer may include an adhesion promoter as a constituent. The adhesion promoter may preferably be included in the intermediate film at a percentage by mass of less than 6 wt.% to improve adhesion of the first layer and / or inner layer.

[0037] According to various embodiments of the invention, the intermediate film of the second layer may include a masterbatch as a constituent. The masterbatch is preferably included in the intermediate film at a percentage by mass between 2 wt.% and 4 wt.%.According to various embodiments of the invention, the low-density polyethylene included in the second layer, in particular in the inner film and / or intermediate film of the second layer, is identical to the low-density polyethylene included in the first layer.

[0038] According to various embodiments of the invention, the polyethylene, in particular low-density or high-density polyethylene included in the first layer and / or in the second layer, may exhibit a melt mass flow rate of between 0,2 g / 10 min and 0,4 g / 10 min, in particular about 0,3 g / 10 min, as determined according to ISO 1133-1:2022 (190°C; 2,16 kg).

[0039] According to various embodiments of the invention, the thermoplastic polyolefin included in the first layer may exhibit a melt mass flow rate of between 0,7 g / 10 min and 0,9 g / 10 min, in particular about 0,8 g / 10 min, as determined according to ISO 1133-1:2022 (230°C; 2,16 kg).

[0040] Another aspect of the relates to a method of manufacturing the receptacle as described herein before. The method including the steps of

[0041] coextruding and blowing, in a first step, the constituents of the first layer and the second layer in a mould, wherein the first layer is disposed on the inside of the mould and the second layer is disposed on the inner surface of first layer;

[0042] removing, in a second step, the receptacle from the mould.

[0043] According to various embodiments of the invention, the first and second layers may in particular be co-extruded to form tubes that are arranged concentrically to each other. The receptacle may in particular be obtained by blow moulding a section of the tube, wherein the second layer is arranged inwards with respect to the first layer.

[0044] According to various embodiments of the invention, the first layer, the intermediate film and inner film may in particular be co-extruded to form tubes that are arranged concentrically to each other. The receptacle may in particular be obtained by blowmoulding a section of the tube, wherein the second layer is arranged inwards with respect to the first layer.

[0045] Brief description of the drawings

[0046] In the following, exemplary embodiments of the present invention will be described in more detail with respect to the accompanying drawings, in which

[0047] Fig. 1 shows a sectional view of a receptacle according to a possible embodiment of the invention;

[0048] Fig. 2 illustrates schematically the structure of wall of the receptacle in a sectional view;

[0049] Fig. 3 illustrates a block diagram of a method for manufacturing the receptacle according to various embodiments.

[0050] Figure 1 shows a sectional view of an exemplary receptacle 1 as provided by the invention. As indicated in figure 1 , the receptacle 1 may be cast into the shape of a bottle. However, various shapes are foreseen and possible, as long as the receptacle 1 can be cast in shape by means of blow moulding, in particular extrusion blow moulding.

[0051] The receptacle 1 has a hollow body 3 for containing the liquid composition, in particular haircare product. The body 3 extends along a longitudinal direction L. The body 3 includes a circumferential portion 5 circumferentially arranged around the longitudinal direction L, a bottom portion 7 substantially extending in a plane perpendicular to the longitudinal direction L and a neck portion 9 providing a conical section of the receptacle 1.The body 3 of the receptacle 1 is provided by a wall 30 having at least two superimposed layers 31, 32, 33. In particular, the circumferential portion 5 and / or neck portion 9 of the receptacle 1 by a multi-layered wall 30. The wall 30 of the embodiment illustrated in figure 2 has a first layer 31 and a second layer 34, wherein the second layer 34 is disposed on an inner surface of the first layer 31. An outer surface of the first layer 31 provides an exterior surface of the receptacle 1. The wall 30 of the receptacle 1 is specifically adapted to convey a smooth tactile impression when touched by the consumer. The second layer 34 disposed on the inner surface of the first layer 31 includes an inner film 33 and an intermediate film 32 disposed between the inner film 33 and the first layer 31. The inner film 33 is exposed to the cosmetic composition contained in the receptacle 1. The first layer 31 includes a thermoplastic polyolefin as a constituent at a percentage by mass between 25 wt.% and 92 wt.%. The second layer 34 includes a low-density polyethylene as a constituent, wherein the low-density polyethylene included in the second layer has a density between 0,91 g / cm3and 0,93 g / cm3, in particular about 0,92 g / cm3, as determined according to ISO 1183-1:2019 (23°C).

[0052] The thickness of the first layer 31 may preferably account for 5% to 15%, in particular 10%, to an average thickness of the wall 30. Accordingly, for the thickness of the first layer 31 accounting for 10% of an average thickness of the wall 30 and the first layer 31 including the thermoplastic polyolefin at a percentage by mass of 25 wt.%, the thermoplastic polyolefin included in the wall 30 at a percentage by mass of 1.5 -3.5 wt.%. In case the thickness of the first layer 31 accounts for 10% to an average thickness of the wall 30 and the first layer 31 includes the thermoplastic polyolefin at a percentage by mass of 92 wt.%, the thermoplastic polyolefin included in the wall 30 at a percentage by mass of 7.5 through 10 wt.%. Accordingly, for a thickness of the first layer 31 in the range of 5% to 15% of the average thickness of the wall, wherein the first layer 31 includes a thermoplastic polyolefin as a constituent at a percentage by mass between 25 wt.% and 92 wt.%, the thermoplastic polyolefin included in the wall 30 is present at a percentage by mass of 0.25 - 17.5 wt.%.Optionally, the first layer 31 may include a high-density polyethylene as a constituent, wherein the high-density polyethylene included in the first layer 31 has a density between 0,94 g / cm3and 0,96 g / cm3, in particular about 0,95 g / cm3, even more particularly 0,953 g / cm3, as determined according to ISO 1183-2:2019 (23°C ± 1°C). The first layer 31 may in particular include high-density polyethylene at a percentage by mass of less than 60 wt.%.

[0053] Optionally, the first layer 31 may include a low-density polyethylene as a constituent, wherein the low-density polyethylene included in the first layer has a density between 0,91 g / cm3and 0,93 g / cm3, in particular about 0,92 g / cm3, as determined according to ISO 1183-1:2019 (23°C). The first layer 31 may in particular include low-density polyethylene at a percentage by mass of less than 60 wt.%.

[0054] Optionally, the first layer 31 includes an adhesion promoter as a constituent. The first layer 31 may in particular include the adhesion promoter at a percentage by mass of less than 6 wt.%.

[0055] Optionally, the first layer 31 includes a masterbatch as a constituent. The first layer 31 may in particular include the masterbatch at a percentage by mass between 2 wt.% and 4 wt.%.

[0056] Optionally, the inner film 33 has a thickness that accounts for 15% to 25%, in particular about 20%, of an average thickness of the wall 30 and / or the intermediate film 32 has a thickness that accounts for 65% to 75%, in particular about 70%, of the average thickness of the wall.

[0057] Optionally, the low-density polyethylene of the second layer is included in the intermediate film 32 of the second layer 34 at a percentage by mass between 15 wt.% and 30 wt.%.

[0058] Optionally, the intermediate film 32 of the second layer 34 includes a high-density polyethylene as a constituent, wherein the high-density polyethylene included inthe intermediate film 32 has a density between 0,94 g / cm3and 0,96 g / cm3, in particular about 0,95 g / cm3, as determined according to ISO 1183-2:2019 (23°C ± 1°C). Optionally, the high-density polyethylene is included in the intermediate film 32 at a percentage by mass between 60 wt.% and 80 wt.%.

[0059] Optionally, the inner film 33 of the second layer 34 includes a low-density polyethylene as a constituent, wherein the low-density polyethylene included in the inner film 33 has a density between 0,91 g / cm3and 0,93 g / cm3, in particular about 0,92 g / cm3, as determined according to ISO 1183-1:2019 (23°C). Optionally, the low-density polyethylene is included in the inner film at a percentage by mass of up to 100 wt.%.

[0060] Optionally, the intermediate film 32 of the second layer 34 includes an adhesion promoter as a constituent, wherein in particular the adhesion promoter is included in the intermediate film 32 at a percentage by mass of less than 6 wt.%.

[0061] Optionally, the intermediate film 32 of the second layer 34 includes a masterbatch as a constituent, wherein in particular the masterbatch is included in the intermediate film 32 at a percentage by mass between 2 wt.% and 4 wt.%.

[0062] Optionally, the low-density polyethylene included in the second layer 34 , in particular the low-density polyethylene included in the inner film 33 of the second layer 34 and / or intermediate film 32 of the second layer 34, is identical to the low-density polyethylene included in the first layer 31.

[0063] Optionally, the thermoplastic polyolefin included in the first layer 31 exhibits a melt mass flow rate of between 0,7 g / 10 min and 0,9 g / 10 min, in particular about 0,8 g / 10 min, as determined according to ISO 1133-1 :2022 (230°C, 2, 16 kg).

[0064] The receptacle 1 is made by blow moulding. As indicated in figure 3, a method for manufacturing the receptacle 1 includes the steps ofcoextruding and blowing, in a first step S01 , the constituents of the first

[0065] layer 31 and the second layer 34 in a mould, wherein the first layer is disposed on the inside of the mould and the second layer is disposed on the inner surface of first layer; the first layer 31 , the intermediate film 32 and inner film 33 are prefer- 5 ably co-extruded to form tubes that are arranged concentrically to each other and

[0066] the receptacle is obtained.

[0067] removing, in a second step S02, the receptacle from the mould.

[0068] io Materials

[0069] Adflex Q 300 F: a commercially available thermoplastic polyolefin with a melt mass flow rate of 0,8 g / 10 min, as determined according to ISO 1133-1:2022 (230°C;

[0070] 2,16 kg).

[0071] 15 Other thermoplastic polyolefin with a melt mass flow rate of 0,7 - 0,9 g / 10 min, as determined according to ISO 1133-1:2022 (230°C; 2,16 kg), can also be adopted to implement the first layer 31. For instance, the thermoplastic polyolefin can be any one of PP + EPDM, SEBS, EPR and EO. The table in the following provides some examples of commercial products that can be utilized to implement the first 20 layer 31 :

[0072] "

[0073]

[0074]

[0075] BRALEN+ FA 03-01 : a commercially available virgin low-density polyethylene with a melt mass flow rate of 0,3 g / 10 min, as determined according to ISO 1133- 5 1:2022 (190°C; 2,16 kg) and a density of 0,92 g / cm3, as determined according to

[0076] ISO 1183-1:2019 (23°C);

[0077] PE-HD LITEN® FB 85 F: a commercially available virgin high-density polyethylene with a melt mass flow rate of 0,3 g / 10 min, as determined according to ISO 1133- 10 1:2022 (190°C; 2,16 kg) and a density of 0,953 g / cm3, as determined according to

[0078] ISO 1183-2:2019 (23°C);

[0079] ADMER™ NF408E: a commercially available adhesion promoter with a melt mass flow rate of 1,4 g / 10 min, as determined according to D1238 (190°C; 2,16 kg)GRUNSTADT Recyprime 002 100 natur: recycled low-density polyethylene commercially available from Grunstadt GmbH, Grunstadt, Germany

[0080] rLDPE WIS "natur": a commercially available recycled low-density polyethylene.

[0081] Example 1 :

[0082] A receptacle 1 was manufactured comprising a wall 30 with a first layer 31 and a second layer 34. The first layer 31 constituted 10% of the wall thickness and includes thermoplastic polyolefin at a percentage by mass of 92 wt.%, adhesion promoter at a percentage by mass of 6 wt.%, and masterbatch at a percentage by mass of 2 wt.%. The second layer 31 constituted 90% of the wall thickness and includes low-density polyethylene at a percentage by mass of 30 wt.%, high-density polyethylene at a percentage by mass of 60 wt.%, adhesion promoter at a percentage by mass of 6 wt.%, and masterbatch at a percentage by mass of 4 wt.%. The receptacle 1 manufactured by means the example 1 has smooth exterior surfaces that convey a pleasant tactile impression when touched by the consumer.

[0083] Comparative Example 1:

[0084] A receptacle 1 was manufactured comprising a wall 30 with a first layer 31 and a second layer 34. The first layer 31 constituted 10% of the wall thickness and includes thermoplastic polyolefin at a percentage by mass of 95 wt.%, adhesion promoter at a percentage by mass of 3 wt.%, and masterbatch at a percentage by mass of 2 wt.%. The second layer 31 constituted 90% of the wall thickness and includes low-density polyethylene at a percentage by mass of 30 wt.%, high-density polyethylene at a percentage by mass of 60 wt.%, adhesion promoter at a percentage by mass of 6 wt.%, and masterbatch at a percentage by mass of 4 wt.%. Due to the first layer 31 of the comparative example 1 , the receptacle 1 has rough sur-faces. Furthermore, the first layer 31 conveys an unpleasant tactile feeling when hold by the consumer.

[0085] Comparative Example 2:

[0086] A receptacle 1 was manufactured comprising a wall 30 with a first layer 31 and a second layer 34. The first layer 31 constituted 10% of the wall thickness and includes thermoplastic polyolefin at a percentage by mass of 20 wt.%, high-density polyethylene at a percentage by mass of 68 wt. %, adhesion promoter at a percentage by mass of 3 wt.%, and masterbatch at a percentage by mass of 9 wt.%. The second layer 31 constituted 90% of the wall thickness and includes low-density polyethylene at a percentage by mass of 30 wt.%, high-density polyethylene at a percentage by mass of 60 wt.%, adhesion promoter at a percentage by mass of 6 wt.%, and masterbatch at a percentage by mass of 4 wt.%. The receptacle 1 in comparative example 2 has rough surfaces because of the first layer 31. The first layer 31 conveys an unpleasant tactile feeling when hold by the consumer.

[0087] Example 2:

[0088] A receptacle 1 was manufactured comprising a wall 30 with a first layer 31 and a second layer 34 including an inner film 33 and an intermediate film 32. The first layer 31 constituted 10% of the wall thickness and includes thermoplastic polyolefin at a percentage by mass of 62 wt.%, low-density polyethylene at a percentage by mass of 30 wt.%, adhesion promoter at a percentage by mass of 6 wt.%, and masterbatch at a percentage by mass of 2 wt.%. The intermediate film 32 of second layer 32 constituted 70% of the wall thickness and includes low-density polyethylene at a percentage by mass of 15 wt.%, high-density polyethylene at a percentage by mass of 75 wt.%, adhesion promoter at a percentage by mass of 6 wt.%, and masterbatch at a percentage by mass of 4 wt.%. The inner film 33 of second layer 32 constituted 20% of the wall thickness of the wall 30 and includes low-density polyethylene at a percentage by mass of 100 wt.%. In terms of the first layer 31 , the receptacle 1 manufactured by means of the example 2 has smoothexterior surfaces that convey a pleasant tactile impression when touched by the consumer.

[0089] Example 3:

[0090] A receptacle 1 was manufactured comprising a wall 30 with a first layer 31 and a second layer 34 including an inner film 33 and an intermediate film 32. The first layer 31 constituted 10% of the wall thickness and includes thermoplastic polyolefin at a percentage by mass of 62 wt.%, low-density polyethylene at a percentage by mass of 30 wt.%, adhesion promoter at a percentage by mass of 6 wt.%, and masterbatch at a percentage by mass of 2 wt.%. The intermediate film 32 of second layer 32 constituted 70% of the wall thickness and includes low-density polyethylene at a percentage by mass of 90 wt.%, adhesion promoter at a percentage by mass of 6 wt.%, and masterbatch at a percentage by mass of 4 wt.%. The inner film 33 of second layer 32 constituted 20% of the wall thickness of the wall 30 and includes low-density polyethylene at a percentage by mass of 100 wt.%. Because of the first layer 31 , the receptacle 1 manufactured by means the example 2 has smooth exterior surfaces that convey a pleasant tactile impression when touched by the consumer.

[0091] In the examples 1 to 3, adhesion promoter is utilized during the manufacturing process of the receptacle 1 , it is well-known for a skilled person that the adhesion promoter only exists during the manufacturing process and it does not exist in the final product of the receptacle 1.

[0092] Although the invention has been explained in relation to its preferred embodiments) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention, which is defined by the appended claims.

Claims

C l a i m s1. Receptacle (1 ) for a cosmetic composition, in particular hair care product, comprising a wall (30) having at least two superimposed layers (31 , 34), wherein the wall (30) includesa first layer (31 ) having an inner surface and an outer surface, the outer surface providing an exterior surface of the receptacle (1); anda second layer (34) disposed on the inner surface of the first layer (31 ), characterized in that the first layer (31) includes a thermoplastic polyolefin as a constituent at a percentage by mass between 25 wt.% and 92 wt.% and the second layer (32) includes a low-density polyethylene as a constituent, wherein the low-density polyethylene included in the second layer (32) has a density between 0,91 g / cm3and 0,93 g / cm3, in particular about 0,92 g / cm3, as determined according to ISO 1183-1 :2019 (23°C).

2. Receptacle (1 ) according to claim 1 , characterized in that the first layer (31 ) has a thickness that accounts for 5% to 15%, in particular 10%, of an average thickness of the wall (30).

3. Receptacle (1) according to claim 1 or 2, characterized in that the first layer (31) includes a high-density polyethylene as a constituent, wherein the high-dens-ity polyethylene included in the first layer (31) has a density between 0,94 g / cm3and 0,96 g / cm3, in particular about 0,95 g / cm3, even more particularly 0,953 g / cm3, as determined according to ISO 1183-2:2019 (23°C ± 1°C), wherein in particular the high-density polyethylene is included in the first layer (31) at a percentage by mass of less than 60 wt.%.

4. Receptacle (1) according to claim 1 or 2, characterized in that the first layer (31) includes a low-density polyethylene as a constituent, wherein the low-density polyethylene included in the first layer (31) has a density between 0,91 g / cm3and 0,93 g / cm3, in particular about 0,92 g / cm3, as determined according to ISO 1183-1:2019 (23°C), wherein in particular the low-density polyethylene is included in the first layer (31) at a percentage by mass of less than 60 wt.%.

5. Receptacle (1) according to any of the previous claims, characterized in that the first layer (31) includes an adhesion promoter as a constituent, wherein in particular the adhesion promoter is included in the first layer (31) at a percentage by mass of 6 wt.%. or less.

6. Receptacle (1) according to any of the previous claims, characterized in that the first layer (31) includes a masterbatch as a constituent, wherein in particular the masterbatch is included in the first layer (31) at a percentage by mass between 2 wt.% and 4 wt.%.

7. Receptacle (1) according to any of the previous claims, characterized in that the second layer (34) comprises an inner film (33) adapted to be exposed to the cosmetic composition contained in the receptacle (1) and an intermediate film (32) disposed between the inner film (33) and the first layer (31 ).

8. Receptacle (1) according to claim 7, characterized in that the inner film (33) has a thickness that accounts for 15% to 25%, in particular about 20%, of an average thickness of the wall (30) and / or the intermediate film (32) has a thickness that accounts for 65% to 75%, in particular about 70%, of the average thickness of the wall (30).

9. Receptacle (1) according to claim 7 or 8, characterized in that the low-density polyethylene of the second layer (34) is included in the intermediate film (32) of the second layer (34) at a percentage by mass between 15 wt.% and 30 wt.%.

10. Receptacle (1) according to any of the claims 7 to 9, characterized in that the intermediate film of the second layer (34) includes a high-density polyethylene as a constituent, wherein the high-density polyethylene included in the intermediate film (32) has a density between 0,94 g / cm3and 0,96 g / cm3, in particular about0,95 g / cm3, as determined according to ISO 1183-2:2019 (23°C ± 1°C), wherein in particular the high-density polyethylene is included in the intermediate film (32) at a percentage by mass between 60 wt.% and 80 wt.%.

11. Receptacle (1 ) according to any of the claims 7 to 10, characterized in that the inner film (33) of the second layer (34) includes a low-density polyethylene as a constituent, wherein the low-density polyethylene included in the inner film (33) has a density between 0,91 g / cm3and 0,93 g / cm3, in particular about 0,92 g / cm3, as determined according to ISO 1183-1:2019 (23°C), wherein in particular the low-density polyethylene is included in the inner film (33) at a percentage by mass of up to 100 wt.%.

12. Receptacle (1) according to any of the claims 7 to 11 , characterized in that the intermediate film (32) of the second layer (34) includes an adhesion promoter as a constituent, wherein in particular the adhesion promoter is included in the intermediate (32) film at a percentage by mass of 6 wt.% or less.

13. Receptacle (1) according to any of the claims 7 to 12, characterized in that the intermediate film (32) of the second layer (34) includes a masterbatch as a constituent, wherein in particular the masterbatch is included in the intermediate film (32) at a percentage by mass between 2 wt.% and 4 wt.%.

14. Receptacle (1) according to any of the previous claims, characterized in that the low-density polyethylene included in the second layer (34), in particular the low-density polyethylene included in the inner film (33) of the second layer (34) and / or intermediate film (33) of the second layer (34), is identical to the low-density polyethylene included in the first layer (31).

15. A method for manufacturing of a receptacle (1 ) according to any of the previous claims, characterized bycoextruding and blowing, in a first step (S01 ), the constituents of the first layer (31) and second layer (34) in a mould to form the receptacle (1) such that thefirst layer (31) is disposed on the inside of the mould and the second layer (34) is disposed on the inner surface of first layer (31 );removing, in a second step (S02), the receptacle (1 ) from the mould.

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