ES2564943T3 - Envelope with at least two compartments - Google Patents

Abstract

Envelope (1) with at least two compartments (5, 7), comprising: - a first compartment (5), containing a composition (C), - a second compartment (7), of smaller capacity than the first, which It contains the same composition, the first and second compartments are made by welding two sheets (2, 3) one on top of the other, the compartments are separated by a welding line (23), each of the sheets (2, 3) is continuously extends on each side of the weld line (23) along the entire length of the latter, from one compartment to the other, characterized by the fact that the capacity C1 of the first compartment (5) is in the range of 10 to 200 ml, the C2 capacity of the second compartment (7) is in the range of 0.2 to 10 ml, and 0.0075 <= C2 / C1 <= 0.1.

Description

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Envelope with at least two compartments

[0001] The present invention relates to envelopes with at least two compartments and methods of production thereof

[0002] The invention relates more particularly but not exclusively to envelopes intended for the packaging of a hair coloring product for use at home.

[0003] The manufacturers of coloring products generally advise consumers to test with a small dose of the product before applying the coloring product to the hair, to reveal any undesirable physiological reaction of the skin.

[0004] In particular, such a reaction may be associated with an allergenic problem.

[0005] It is preferable to carry out this test 48 hours before the use of the coloring product, applying a drop of the product on the surface of the skin, and especially behind the ear, to find out later if this deposit leads to the appearance of redness, in which case the application of the coloring product is not recommended.

[0006] Hair dyes are usually oxygen sensitive.

In particular, oxidation dyes used in permanent coloring products react strongly in the presence of oxygen, so that if the product drop is taken from the same compartment as the one containing the composition to be used in the hair, the opening The compartment can lead to at least one change in the appearance of the composition, which can make the consumer think that the product is defective.

[0007] Application FR 2 918 038 describes an envelope with two compartments that are separable when pre-cut.

Said envelope is of relatively complex production.

[0008] Application EP 1 669 305 A1 discloses a sheet material suitable for making envelopes containing a hair coloring composition.

[0009] Application EP 1 357 047 A1 describes a tube, the end of which has a second compartment that can be separated from the rest of the tube.

[0010] Application EP 0 639 364 A1 and US patent 6 047 817 disclose packaging devices with two compartments.

[0011] Application FR 2 760 436 A1 discloses an envelope with two compartments of different sizes, with the same composition for hair treatment.

[0012] There is a need to offer the consumer means to perform a test with a small dose of the product but without altering the quality of the coloring product intended to be applied to the hair, and without the proposed solution leading to extra costs or causing problems logistic.

[0013] The invention aims to satisfy this need.

[0014] According to one of its aspects, the invention relates to an envelope with at least two compartments, comprising:

- a first compartment, which contains a composition,

- a second compartment, of smaller capacity than the first, which contains the same composition, where the first and second compartments are made by welding two sheets on top of each other, the compartments are separated by a welding line, each of The sheets continuously extend to each side of the weld line along the entire length of the latter, from one compartment to the other, where the capacity C2 of the second compartment is less than the capacity C1 of the first compartment, with 0.0075 <C2 / C1 <0.1, and C1 capacity is in the range of 10 to 200 ml, and C2 is in the range of 0.2 to 10 ml.

[0015] "Envelope" should be understood as a flexible pocket that excludes the presence of a distributor element such as a capsule or an injection tip, unlike a tube.

[0016] The invention allows reliable and economical packaging of two quantities of a product, for example a test quantity and a larger quantity.

The second compartment, of reduced volume, offers the user the possibility of using the composition contained in this second compartment, and waiting for the 48 hours required for the safety test, without the

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composition contained in the first compartment is altered by the environment; the user can also use the composition contained in the first compartment directly, without using the composition contained in the second compartment.

[0018] The invention provides an easy opening of each compartment, advantageously without a tool, since one or more starts for tearing are provided.

[0019] The first compartment is intended to be opened along a first opening line marked on the envelope, preferably adjacent to the welding line.

[0020] The second compartment is intended to be opened along a second opening line, marked on the envelope.

[0021] At least one, and preferably each of the first and the second opening line, is marked by two starts for tearing at its ends, which consist, for example, of notches cut in the sheets.

[0022] The compartments are entirely delimited by welding lines, which excludes any injected distribution tip.

[0023] The composition is preferably a dye composition for hair coloring.

[0024] The opening of the first compartment can lead to the separation of the two compartments, the second being completely separated from the envelope.

[0025] According to another of its aspects, the invention also relates to a method of manufacturing and filling an envelope, as defined above, comprising:

- welding, especially by thermal welding, two sheets to form an envelope that has an open space only at one end,

- fill this space with the composition,

- close the envelope opening,

- welding through the composition, especially by ultrasonic welding, to form a welding line and to define two compartments on each side of the latter, the capacities of these two compartments being unequal.

[0026] According to another of its aspects, the invention also relates to a method of treating hair by means of an envelope according to the invention, as defined above, comprising:

- carry out a test with a quantity of evidence contained in the second compartment,

- If the test does not show any signs of allergy, apply the contents of the first compartment to the hair.

[0027] According to another of its aspects, the invention also relates to the use of an envelope according to the invention, as defined above, for the packaging of a permanent, semi-permanent or temporary coloring product.

[0028] The invention can be better understood by reading the detailed description given below of practical non-limiting examples thereof, and by examining the attached drawing, in which:

- Fig. 1 shows a front view of an example of an envelope made according to the invention,

- Figures 2 and 3 are sections respectively along II-II and III-III of Fig. 1, and

- Figures 4 and 5 are views similar to Fig. 1 of variants of embodiments.

[0029] Envelope 1 shown in Fig. 1 has a general shape that extends along a longitudinal axis X and comprises two sheets 2 and 3, which are assembled along welding lines to define a first compartment 5 and a second compartment 7 containing, in the example under consideration, one and the same hair dye.

The latter can be a product for permanent coloring (oxidation coloring), or a product for semi-permanent or temporary coloring (direct coloring).

Examples of such products are given in the book "Chemical and Physical Behavior of Human Hair", 4th edition, chapter 6, pages 311-344 of Clarence R. Robbins, published by Springer.

[0030] In particular, the coloring composition contained in the envelope may contain one or more oxidation bases and / or one or more couplers conventionally used to dye keratin fibers.

[0031] Among the oxidation bases, there can be mentioned para-phenylenediamines, bis-phenylalkylenediamines, para-aminophenols, bis-para-aminophenols, orthophenophenols, heterocyclic bases and addition salts thereof.

[0032] Among the couplers, there can be mentioned, above all, methanylenediamines, meta aminophenols, methamphenols, naphthalenic couplers, heterocyclic couplers and addition salts thereof.

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[0033] The coloring composition may also comprise an oxidizing agent, which may be selected from hydrogen peroxide, urea peroxide, alkali metal bromates, persalts such as perborates and persulfates, as well as enzymes, among which peroxidases may be mentioned , oxidoreductases with 2 electrons such as urate-oxidases and oxygen with 4 electrons such as lacases.

The use of hydrogen peroxide is particularly preferred.

[0034] The coloring composition may also contain additional direct dyes.

Such dyes can be used alone or in combination with a coloring composition as described above.

These direct dyes are, for example, selected from direct nitrocolourants derived from neutral, acidic or cationic benzene, neutral, acidic or cationic direct azocolorants, tetraazapentametine dyes, quinone dyes and in particular neutral anthraquinone, acidic or cationic dyes, direct azine dyes, direct triarylmethane dyes, direct indoamine dyes and direct natural dyes.

[0035] Among natural direct dyes, there may be mentioned lawsona, juglone, alizarin, purpurine, carmphnic acid, kermesic acid, purpurogaline, protocatecaldehyde, indigo, isatin, curcumin, spinulosin, apigenidine. It is also possible to use extracts or decoctions containing these natural dyes and especially poultices or henna-based extracts.

[0036] Beneficial agents for keratinous materials, or nutrient solution, can also be added to said compositions, and these agents can be selected from:

(1) amino acids, oligopeptides, peptides, hydrolyzed or non-hydrolyzed, modified or unmodified proteins,

(2) linear or branched fatty acids and alcohols,

(3) animal, vegetable or mineral waxes,

(4) ceramides and pseudoceramides,

(5) hydroxylated organic acids,

(6) UV filters,

(7) antioxidant and anti free radical agents,

(8) chelating agents,

(9) anti-dandruff agents,

(10) agents for seborrhea control,

(11) soothing agents,

(12) cationic surfactants,

(13) amphoteric polymers,

(14) silicones, organomodified or not,

(15) mineral, vegetable or animal oils,

(16) polyisobutenes and poly (a-olefins),

(17) esters,

(18) soluble or dispersed anionic polymers,

(19) soluble or dispersed non-ionic polymers, and mixtures thereof.

[0037] The first compartment 5 extends along the X axis, which is a longitudinal X axis for this compartment, in a length L and its width is reduced towards an upper end to define a neck 9 which serves to distribute the content of this compartment, and this neck 9 can be opened by cutting the envelope along a transverse opening line 10.

The second compartment 7 extends as an extension of the first compartment 5, on the neck 9.

[0038] The capacity of the first compartment 5 is for example 100 ml and that of the second 0.5 ml.

[0039] Advantageously, notches 11 and 12 can be made at the ends of the opening line 10, as illustrated, to create a tear start and to facilitate the opening of the envelope.

These notches 11 and 12 mark the location of the opening line 10 for the user.

[0040] The neck 9 defines a distribution opening 26, of width l less than the width w of the compartment 5 below the neck 9.

We have for example O <l <w / 3.

[0041] The sheets 2 and 3 are welded together in lines 20 along the edges of the envelope, at the bottom 21 of envelope 1 and in parts 22 defining the neck 9.

[0042] Compartment 5 is closed on the opening line 10 by a weld along a weld line 23, which separates compartments 5 and 7.

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[0043] In the example shown, the width of the compartment 7 is less than or equal to the width 1 of the opening 26 and is reduced with an increasing distance from the last one to a transverse opening line 30 allowing access to the contents of the second compartment 7.

[0044] Advantageously, notches 31 and 32 are made at the ends of the opening line 30.

These notches 31 and 32 mark the location of the opening line 30 for the user.

In the example shown, the opening lines 10 and 30 are parallel to each other and to the welding line 23 that is between them.

[0045] The sheets 2 and 3 are welded in parts 38 along the second compartment 7, and above the last one in 39.

[0046] As can be seen above all in Fig. 3, each sheet 2 or 3 continuously extends to each side of the weld line 23 in the passage from one compartment to the other.

In other words, there is no cut in sheet 2 or 3 between compartments 5 and 7, unlike the envelope described in FR 2 918 038 where the compartments are separated by cuts made in the sheets that were used to make the envelope.

The absence of such cuts facilitates the filling of the envelope, which can be done using a single filling tube, as described in detail later.

In the example of Fig. 1, the only cuts made are those that give the envelope its external contour.

[0047] If the user is testing composition C for the first time, tear the second compartment at the start level for corresponding tearing consisting of notch 31 or 32, take the required amount of composition from this compartment, and deposit it where require, for example behind the ear.

[0048] After the prescribed time, 48 hours for example, and in the absence of an immunological reaction, the user opens the first compartment 5 at the level of the corresponding opening for opening, ie notch 11 or 12, and applies the product.

[0049] If the user has already performed a test with this same composition C, open the first compartment 5 directly at the level of the notch 11 or 12, and apply the product.

[0050] The opening of the first compartment 5 can lead to the separation of the compartments 7 and 5, the compartment 7 being completely separated from the envelope.

[0051] Envelope 1 can be made and filled as follows.

[0052] The two sheets 2 and 3 are assembled by thermal welding, said sheets are for example such as those described in European patent application EP 1 669 305, each with a multilayer complex, where said complex can comprise a metal layer , for example, aluminum, an adhesive agent, for example a copolymer of ethylene and acrylic acid, and a layer of non-metallic material, for example PE, bonded to the metal layer through the adhesive agent.

Each sheet preferably has a thickness less than or equal to 250 pm.

[0053] The two sheets 2 and 3 of multilayer material are arranged against each other, the part that can be welded against the part that can be welded, and welded together with thermal welding to close the envelope, leaving a open part.

This open part can be placed on the side opposite the neck 9, but also on one of the side sides parallel to the X axis.

[0054] A tube of a device for filling the composition is inserted through this open part, and the composition is injected.

[0055] After removing the filling device, thermal welding closes the envelope completely and hermetically, while providing the desired final shape.

[0056] Then additional welding is carried out along the welding line 23 to form and separate the two compartments 5 and 7.

This additional welding is of the type that allows welding through the composition without degrading this, preferably ultrasonic welding.

[0057] The two manufacturing steps are performed one after the other, without breaking the production chain.

[0058] The invention is not limited to the example just described.

[0059] For example, to facilitate the opening of the two compartments 5 and 7, in the welded area that delimits each

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one of these two compartments, the notches 11, 12, 31 and 32 can be replaced with any other known device for easy opening, for example in the case of a sheet of multilayer composite material, a precut of the outer layer, without reaching The aluminum layer

[0060] An envelope according to the invention allows to offer security for the user, has a carbon footprint smaller than an aluminum tube such as those currently used, is of lower cost than said tube or an envelope as presented in FR 2 918 038, and it is much simpler to produce industrially.

[0061] The shape of the envelope as well as the first and second compartments can be varied while remaining within the scope of the present invention.

[0062] Thus, Fig. 4 shows a variant where the envelope 1 has a constant width throughout its height, in addition to the notches 11, 12, 31 and 32.

[0063] In the variant of Fig. 5, the second compartment 7 is made in a corner of envelope 1.

[0064] The opening lines 10 and 30 thus extend obliquely relative to the longitudinal axis X.

Envelope 1 has for example a rectangular contour.

Welding line 23 extends obliquely, in parallel to opening lines 10 and 30.

[0065] The compartment 5 is delimited in the upper part by a welding line 50, perpendicular to the longitudinal axis X.

The compartment 7 is also delimited in the upper part by this line 50 and laterally by the adjacent line 20.

Claims (10)

5 10 fifteen twenty 25 30 35 40 Four. Five 1. Envelope (1) with at least two compartments (5, 7), comprising: - a first compartment (5), which contains a composition (C), - a second compartment (7), of smaller capacity than the first, which contains the same composition, the first and second compartments are made by welding two sheets (2, 3) on top of each other, the compartments are separated by a line of welding (23), each of the sheets (2, 3) continuously extends on each side of the welding line (23) along the entire length of the latter, from one compartment to the other, characterized in that the capacity C1 of the first compartment (5) is in the range of 10 to 200 ml, the capacity C2 of the second compartment (7) is in the range of 0.2 to 10 ml, and 0.0075 <C2 / C1 <0.1. 2. On the basis of claim 1, the first compartment (5) being intended to be opened along a first opening line (10) marked on the envelope, adjacent to the welding line (23). 3. According to claim 1 or 2, the second compartment being intended to be opened along a second opening line (30) marked on the envelope. 4. According to claims 2 and 3, each of the first and second opening line being marked by two starts for tearing at its ends. 5. As claimed in any one of claims 1 to 4, each of the compartments being entirely delimited by welding lines. 6. As claimed in any of claims 1 to 5, the composition (C) being a dye composition for hair coloring. 7. As claimed in any of claims 2 to 6, wherein the opening of the first compartment (5) leads to the separation of the two compartments (5,7), the second being completely separated from the envelope. 8. Method of manufacturing and filling an envelope as defined in any of the preceding claims, comprising: - welding, especially by thermal welding, of two sheets (2, 3) to form an envelope that has an open space only at one end, - filling this space with the composition, - closing the envelope opening, - welding through the composition to form the welding line (23) and to define the two compartments (5, 7) of unequal capacities. 9. Method of treating hair by means of an envelope as defined in any one of claims 1 to 7, comprising: - carry out a test with an amount of evidence contained in the second compartment (7), - If the test does not show any signs of allergy, apply the contents of the first compartment (5) on the hair. 10. Use of an envelope as claimed in any one of claims 1 to 7, for packaging a permanent, semi-permanent or temporary coloring product.