EP0310472B1 - Method for compacting a powder-based cosmetic preparation - Google Patents

Method for compacting a powder-based cosmetic preparation Download PDF

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Publication number
EP0310472B1
EP0310472B1 EP88402274A EP88402274A EP0310472B1 EP 0310472 B1 EP0310472 B1 EP 0310472B1 EP 88402274 A EP88402274 A EP 88402274A EP 88402274 A EP88402274 A EP 88402274A EP 0310472 B1 EP0310472 B1 EP 0310472B1
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EP
European Patent Office
Prior art keywords
tray
compacting
cosmetic preparation
compact
opening
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EP88402274A
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German (de)
French (fr)
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EP0310472A1 (en
Inventor
Jean-Louis Gueret
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LOreal SA
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LOreal SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B1/20—Reducing volume of filled material
    • B65B1/24—Reducing volume of filled material by mechanical compression
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D33/00—Containers or accessories specially adapted for handling powdery toiletry or cosmetic substances

Definitions

  • the present invention relates to the field of cosmetic preparations constituted by compressed dry powders or by mixtures of compressed dry powders, or also by powder-anhydrous binder mixtures, these cosmetic preparations which advantageously contain colored or tinted pigments, used for make-up of the face, and often being designated by the term "compact".
  • this type of powder consists of a powder base chosen in particular from talc, rice starch, kaolin, silk powder or polymer powder to which pigments are added to obtain coloring for example of titanium, zinc or iron oxides.
  • a mica powder or a mica powder coated with metal oxides, in particular titanium and bismuth or aluminum powders is added.
  • a small amount of binder is generally added, for example vegetable, animal, mineral or synthetic oils, zinc stearate, sorbitol or lanolin.
  • These powders can also contain preservatives such as methylparaben or propylparaben, surfactants, preferably nonionic and perfumes.
  • the basic fluid powder is placed in the bottom of an enclosure, in which a piston or a punch is slid which compresses said powder to ensure the cohesion of its grains.
  • a piston or a punch is slid which compresses said powder to ensure the cohesion of its grains.
  • the enclosure is, at its base, delimited by a cup which receives the resulting compact product.
  • the compact product thus obtained is not homogeneous over its height, in particular that it is more brittle in the region near the bottom of the cup, and harder in the opposite region, on the surface of which the compacting piston was applied. This is because the pressure applied to the flowing powder does not pass through the powder layer due to the elasticity of the powder layer. However, in use, it is easier to take the powder from a more brittle part.
  • the present invention proposes, in order to be able to benefit from this advantage, a process which makes it possible to directly obtain a compact product packaging accessible by the user through this more brittle part.
  • the final packaging consisting, for example, of a box
  • the resulting cup is presented turned over on itself so that the product can be withdrawn through its opening (s) (s).
  • a base counter plate can be used having, in correspondence with each opening, a slightly convex shape, so that the compact protrudes from the bottom of the cup, by the (or the) opening (s) made therein, according to a slightly curved part also giving a more aesthetic appearance to the whole.
  • Another advantage of the process according to the invention is that the above-mentioned openings can have any which cut, therefore, advantageously, original or aesthetic cutouts, but that, in all cases, the same compacting piston can be used for a cup of given overall shape. It suffices simply to replace, each time, in the compaction system, the cup with another comprising another type of opening.
  • a protective film advantageously constituting a film of inviolability of the powder
  • the powder contains a binder which distributes better and faster in the base powder.
  • the binder can also be used in the form of microcapsules.
  • the present invention therefore firstly relates to a process for the compacting of a cosmetic preparation based on powder, according to which a quantity of said pulverulent preparation is placed in an enclosure which is open at its upper part and whose lower part is delimited by a cup intended to contain, at the end of the operation, the resulting compact cosmetic preparation, to constitute, with the latter, an element for conditioning the cosmetic preparation, and the pulverulent preparation is compressed in said enclosure, characterized in that a cup is used whose bottom has at least one opening, said enclosure being delimited, in the region of said (or of said) opening (s) by a base plate on which said cup rests.
  • the surface of the compact cosmetic preparation which is accessible via said opening (s), constitutes, in the final packaging of the compact cosmetic preparation, the surface for sampling, by the user, of said preparation.
  • a cup is used, the opening (s) of which (are) made in the central part of the base, the border region of the compact cosmetic preparation being protected from the outside by the peripheral zone of the bottom of said cup.
  • a counter plate is used, the surface of which facing the opening (or each opening) of the bottom of the cup is slightly concave in order to obtain a slightly convex surface for the preparation. projection from the plane of the outer wall of the bottom of the compact cup.
  • a flexible protective film capable of remaining integral with said cup and its contents after compacting.
  • This film must be made of an extremely flexible material in the case where the previous variant is used.
  • a film is completely adhesive, one obtains, when the latter is removed, a surface of the compact product which comprises a slight screening, which can be sought from an aesthetic point of view.
  • the method according to the invention it is possible to provide, in the enclosure, facing the counter plate, and passing through the opening (or at least one of the openings ) from the bottom of the cup, at least one transverse bar which separates powdery cosmetic preparations of different natures, and compact these preparations simultaneously.
  • a layer of liquid adhesive for example hot-melt adhesive
  • a layer of liquid adhesive can be deposited on the bottom of a housing capable of receiving by interlocking the cup containing the compact preparation, the bottom of said cup being turned towards the outside, and said adhesive is then left to harden, to ensure the fixing of the cup on the bottom of the case and on the lower internal edge of the side wall of said case, to constitute the final packaging of the compact preparation.
  • a powdery cosmetic preparation which contains a certain amount of at least one binder, for example from 2 to 15% by weight relative to the totality of the powdery cosmetic preparation.
  • a binder (s) conditioned in microcapsules which burst during compression, in order to distribute the binder within the powder particles.
  • hot compaction can be carried out.
  • a compacting piston equipped with a heating device is used in particular and the temperature of the compacting piston is adjusted to a value comprised, for example, between 40 and 30 ⁇ 0 ⁇ ° C.
  • hydrophobic binders such as waxes, which cannot be could use if there was no heat input, which makes it possible to obtain more hydrophobic compacts, for a makeup that is more resistant to water.
  • the present invention also relates to a compact cosmetic preparation obtained according to the process defined above.
  • an enclosure has been designated by 1 in which an amount of powder 2 has been placed intended to be compacted.
  • This powder can, for example, have the following weight composition:
  • the enclosure 1 is delimited by a horizontal support 3, serving as a counter-plate in the powder compacting operation 2, by a cup 4 resting on said counter-plate 3, and by a tubular sleeve 5.
  • the cup 4 made of plastic for example, is constituted by a rectangular bottom 6, to which is connected a side wall 7 of low height.
  • the quantity of fluid powder 2 introduced and the dimensions of the cup 4 are calculated so that the compaction leads to a flat parallelepiped block 8 (FIG. 3) whose upper surface is flush with the free edge of the side wall 7 of the cup 4.
  • the latter has the particularity that its bottom 6 has an opening 9 of ellipsoidal shape, centered on the center of the bottom 6 and occupying a large surface of said bottom.
  • the sleeve 5, of rectangular cross section corresponding to the internal cross section of the cup 4 has a recess 10 from its internal wall, at a distance from one of its edges which is equal to the height of the cup 4.
  • the cup 4 rests on the counter plate 3 with the interposition of a film 11, the sleeve 5 coming to fit axially on the cup 4, so that the free upper edge of the latter abuts against the recess 10, the internal surfaces of the wall 7 and of the sleeve 5 coming to be placed in the extension of one another.
  • the film 11 is a very flexible plastic film; its shape and dimensions correspond to those of the bottom of the cup 4; moreover, it is extended laterally by a tongue 12, as is clearly visible in FIG. 2.
  • the film 11 is bonded by its border to the periphery of the external wall of the bottom 6, or else it is completely adhesive.
  • a piston 13 is slidably mounted, which can be equipped with a heating device 14, for example, by an electrical resistance.
  • This optional device 14 is shown in dotted lines in FIG. 1.
  • the piston 13 is applied to the powder 2, the level of which exceeds that of the upper edge of the cup 4 until the compact is produced 8.
  • the compaction pressure is between 40 and 400 bars and it is maintained for 1 to 15 seconds. Then, after removing the piston and removing the sleeve 5, the assembly shown in FIG. 2 is removed, consisting of the cup 4, the compact 8 and the film 11.
  • the film 11 is removed in one piece by grasping the tongue 12 and there is then access to the compact 8 through the opening 9 of the cup 4. Access to the compact product is therefore made by the less hard part of the compact 8 and, therefore, the removal of the product is easier. Furthermore, any hidden defects of the edge of the compact 8 are hidden from view, this edge being covered by the periphery of the bottom 6.
  • the bonding of the compact 8 to the bottom 16 of the housing 15, avoids inadvertent cracking of the compact 8 either in use, when the user is required to press the compact 8, or at the time of transportation.
  • FIG. 4 an alternative embodiment is shown according to which the counter plate 3 a has, in its region coming opposite the opening 9 of the bottom 6 of the cup 4, a slightly concave shape. In this way, a compact 8 is obtained which projects slightly through the opening 9, thus giving an aesthetic effect to the resulting packaging.
  • FIG. 5 illustrates another possibility offered by the present invention, namely that of provide, in enclosure 1, on the bottom 6 of the cup 4, a transverse separation strip 19 formed between the two edges of the bottom 6, the two longitudinal edges of said bottom 6 delimiting the opening 9.
  • This strip 19 constitutes a separation allowing the introduction, into the enclosure, of two types of pulverulent substances, 2 a , 2 b , different for example by the color of the pigments which they contain, and constituting for example complementary makeup products.
  • the bar 19 may have a curved shape, also giving an aesthetic note to the final packaging of the compact 8.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cosmetics (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Description

La présente invention concerne le domaine des préparations cosmétiques constituées par des poudres sèches comprimées ou par des mélanges de poudres sèches comprimées, ou encore par des mélanges poudres-liants anhydres, ces préparations cosmétiques qui renferment avantageusement des pigments colorés ou teintés, servant pour le maquillage du visage, et étant souvent désignées par le terme "compacts".The present invention relates to the field of cosmetic preparations constituted by compressed dry powders or by mixtures of compressed dry powders, or also by powder-anhydrous binder mixtures, these cosmetic preparations which advantageously contain colored or tinted pigments, used for make-up of the face, and often being designated by the term "compact".

De façon générale, on sait que ce type de poudre est constitué d'une base pulvérulente choisie notamment parmi le talc, l'amidon de riz, le kaolin, la poudre de soie ou la poudre de polymère à laquelle on ajoute des pigments pour obtenir une coloration par exemple des oxydes de titane, de zinc ou de fer. Lorsque l'on désire un effet nacrant, on ajoute une poudre de mica ou une poudre de mica revêtue par des oxydes métalliques notamment de titane et de bismuth ou des poudres d'aluminium. Pour obtenir une adhérence suffisante sur la peau, on ajoute généralement une petite quantité de liant par exemple des huiles végétales, animales, minérales ou synthétiques, du stéarate de zinc, du sorbitol ou de la lanoline. Ces poudres peuvent contenir, en outre, des agents de conservation tels que le méthylparabène ou le propylparabène, des tensio-actifs, de préférence non-ioniques et des parfums.Generally, it is known that this type of powder consists of a powder base chosen in particular from talc, rice starch, kaolin, silk powder or polymer powder to which pigments are added to obtain coloring for example of titanium, zinc or iron oxides. When a pearlescent effect is desired, a mica powder or a mica powder coated with metal oxides, in particular titanium and bismuth or aluminum powders, is added. To obtain sufficient adhesion to the skin, a small amount of binder is generally added, for example vegetable, animal, mineral or synthetic oils, zinc stearate, sorbitol or lanolin. These powders can also contain preservatives such as methylparaben or propylparaben, surfactants, preferably nonionic and perfumes.

Pour obtenir un compact de maquillage, on dispose la poudre fluide de base dans le fond d'une enceinte, dans laquelle on fait coulisser un piston ou un poinçon qui vient comprimer ladite poudre pour assurer la cohésion de ses grains. En général, on s'arrange pour que l'enceinte soit, à sa base, délimitée par une coupelle qui reçoit le produit compact résultant.To obtain a make-up compact, the basic fluid powder is placed in the bottom of an enclosure, in which a piston or a punch is slid which compresses said powder to ensure the cohesion of its grains. In general, it is arranged so that the enclosure is, at its base, delimited by a cup which receives the resulting compact product.

On a toutefois constaté que le produit compact ainsi obtenu n'est pas homogène sur sa hauteur, en particulier qu'il est plus friable dans la région voisine du fond de la coupelle, et plus dur dans la région opposée, sur la surface de laquelle a été appliqué le piston de compactage. La raison en est que la pression appliquée sur la poudre fluide ne se transmet pas de façon à travers la couche de poudre, par suite de l'élasticité de la couche de poudre. Or, à l'utilisation, il est plus aisé de prélever la poudre sur une partie plus friable.However, it has been found that the compact product thus obtained is not homogeneous over its height, in particular that it is more brittle in the region near the bottom of the cup, and harder in the opposite region, on the surface of which the compacting piston was applied. This is because the pressure applied to the flowing powder does not pass through the powder layer due to the elasticity of the powder layer. However, in use, it is easier to take the powder from a more brittle part.

La présente invention propose, pour pouvoir bénéficier de cet avantage, un procédé qui permet d'obtenir directement un conditionnement de produit compact accessible par l'utilisateur par cette partie plus friable. A cet effet, on prévoit que la coupelle placée dans le fond de l'enceinte présente au moins une ouverture, ladite enceinte étant délimitée, au niveau de cette (ou de ces) ouverture(s), par une contre-plaque de base. Dans ces conditions, on présente après l'opération de compactage, dans un conditionnement final constitué, par exemple, par un boîtier, la coupelle résultante retournée sur elle-même pour qu'on puisse prélever le produit à travers son (ou ses) ouverture(s).The present invention proposes, in order to be able to benefit from this advantage, a process which makes it possible to directly obtain a compact product packaging accessible by the user through this more brittle part. To this end, provision is made for the cup placed in the bottom of the enclosure to have at least one opening, said enclosure being delimited, at this (or these) opening (s), by a base counterplate. Under these conditions, after the compacting operation, in the final packaging consisting, for example, of a box, the resulting cup is presented turned over on itself so that the product can be withdrawn through its opening (s) (s).

Par ailleurs, dans la mise en oeuvre d'un compactage classique, on a constaté que les bords des compacts présentent souvent des défauts. Avec le procédé de la présente invention, il suffit de disposer la (ou les) ouverture(s) du fond de la coupelle, principalement dans la région centrale de celle-ci ; de la sorte, les bords du compact sont cachés dans le conditionnement final, lequel offre alors un aspect plus esthétique.Furthermore, in the implementation of conventional compacting, it has been found that the edges of the compacts often have defects. With the method of the present invention, it suffices to have the opening (s) at the bottom of the cup, mainly in the central region thereof; in this way, the edges of the compact are hidden in the final packaging, which then offers a more aesthetic appearance.

Conformément à une variante de mise en oeuvre du procédé selon l'invention, on peut utiliser une contre-plaque de base présentant, en correspondance avec chaque ouverture, une forme légèrement convexe, pour que le compact dépasse du fond de la coupelle, par la (ou les) ouverture(s) pratiquée(s) dans celui-ci, selon une partie légèrement bombée donnant aussi un aspect plus esthétique à l'ensemble.In accordance with an alternative implementation of the method according to the invention, a base counter plate can be used having, in correspondence with each opening, a slightly convex shape, so that the compact protrudes from the bottom of the cup, by the (or the) opening (s) made therein, according to a slightly curved part also giving a more aesthetic appearance to the whole.

Un autre avantage du procédé selon l'invention est que les ouvertures précitées peuvent présenter n'importe quelle découpe, donc, avantageusement, des découpes originales ou esthétiques, mais que, dans tous les cas, on pourra utiliser le même piston de compactage pour une coupelle de forme d'ensemble donnée. Il suffit simplement de remplacer, à chaque fois, dans le système de compactage, la coupelle par une autre comportant un autre type d'ouverture.Another advantage of the process according to the invention is that the above-mentioned openings can have any which cut, therefore, advantageously, original or aesthetic cutouts, but that, in all cases, the same compacting piston can be used for a cup of given overall shape. It suffices simply to replace, each time, in the compaction system, the cup with another comprising another type of opening.

On peut, en outre, dans le système de compactage, interposer, entre la contre-plaque de base et la coupelle, un film de protection constituant avantageusement un film d'inviolabilité de la poudre ; on peut aussi ménager, au fond de la coupelle, au moins une barrette transversale qui sépare en deux zones l'ouverture du fond de la coupelle, de façon à, compacter, dans une même opération, des poudres de différentes natures, par exemple renfermant des pigments de couleurs différentes, notamment pour présenter des produits de maquillage complémentaires.It is also possible, in the compacting system, to interpose, between the base plate and the cup, a protective film advantageously constituting a film of inviolability of the powder; it is also possible to provide, at the bottom of the cup, at least one transverse bar which separates the opening of the bottom of the cup into two zones, so as to compact, in the same operation, powders of different natures, for example containing pigments of different colors, in particular for presenting complementary makeup products.

On peut également prévoir d'effectuer un compactage à chaud, afin d'obtenir une meilleure cohésion du produit compact résultant, ce qui est intéressant notamment dans le cas où la poudre renferme un liant lequel se répartit mieux et plus vite dans la poudre de base ; le liant peut aussi être mis en oeuvre sous forme de microcapsules.It is also possible to provide for hot compaction, in order to obtain better cohesion of the resulting compact product, which is advantageous in particular in the case where the powder contains a binder which distributes better and faster in the base powder. ; the binder can also be used in the form of microcapsules.

La présente invention a donc d'abord pour objet un procédé pour le compactage d'une préparation cosmétique à base de poudre, suivant lequel on place une quantité de ladite préparation pulvérulente dans une enceinte qui est ouverte à sa partie supérieure et dont la partie inférieure est délimitée par une coupelle destinée à contenir, en fin d'opération, la préparation cosmétique compacte résultante, pour constituer, avec cette dernière, un élément de conditionnement de la préparation cosmétique, et on réalise la compression de la préparation pulvérulente dans ladite enceinte, caractérisé par le fait qu'on utilise une coupelle dont le fond comporte au moins une ouverture, ladite enceinte étant délimitée, dans la région de ladite (ou desdites) ouverture(s) par une contre-plaque de base sur laquelle repose ladite coupelle. La surface de la préparation cosmétique compacte qui est accessible par ladite (ou lesdites) ouverture(s), constitue, dans le conditionnement final de la préparation cosmétique compacte, la surface de prélèvement, par l'utilisateur, de ladite préparation.The present invention therefore firstly relates to a process for the compacting of a cosmetic preparation based on powder, according to which a quantity of said pulverulent preparation is placed in an enclosure which is open at its upper part and whose lower part is delimited by a cup intended to contain, at the end of the operation, the resulting compact cosmetic preparation, to constitute, with the latter, an element for conditioning the cosmetic preparation, and the pulverulent preparation is compressed in said enclosure, characterized in that a cup is used whose bottom has at least one opening, said enclosure being delimited, in the region of said (or of said) opening (s) by a base plate on which said cup rests. The surface of the compact cosmetic preparation which is accessible via said opening (s), constitutes, in the final packaging of the compact cosmetic preparation, the surface for sampling, by the user, of said preparation.

En particulier, on utilise une coupelle dont la (ou les) ouverture(s) est (ou sont) pratiquée(s) dans la partie centrale du fond, la région de bordure de la préparation cosmétique compacte étant protégée de l'extérieur par la zone périphérique du fond de ladite coupelle.In particular, a cup is used, the opening (s) of which (are) made in the central part of the base, the border region of the compact cosmetic preparation being protected from the outside by the peripheral zone of the bottom of said cup.

Selon une variante du procédé selon l'invention, on utilise une contre-plaque dont la surface venant en regard de l'ouverture (ou de chaque ouverture) du fond de la coupelle est légèrement concave pour obtenir pour la préparation une surface légèrement convexe en saillie par rapport au plan de la paroi externe du fond de la coupelle du compact.According to a variant of the method according to the invention, a counter plate is used, the surface of which facing the opening (or each opening) of the bottom of the cup is slightly concave in order to obtain a slightly convex surface for the preparation. projection from the plane of the outer wall of the bottom of the compact cup.

Selon une caractéristique intéressante du procédé de l'invention, on peut disposer, entre le fond de la coupelle et la contre-plaque de base, une pellicule souple de protection capable de rester solidaire de ladite coupelle et de son contenu après le compactage. Cette pellicule doit être réalisée en un matériau extrêmement souple dans le cas où la variante précédente est mise en oeuvre.According to an advantageous characteristic of the process of the invention, it is possible to have, between the bottom of the cup and the base counterplate, a flexible protective film capable of remaining integral with said cup and its contents after compacting. This film must be made of an extremely flexible material in the case where the previous variant is used.

On peut notamment utiliser une pellicule soudée ou collée sur la bordure externe du fond de la coupelle, ou bien une pellicule totalement adhésive, une telle pellicule réalisant ainsi l'inviolabilité de la préparation cosmétique compacte dans la coupelle associée. Dans le cas où la pellicule est totalement adhésive, on obtient, lorsqu'on retire cette dernière, une surface du produit compact qui comporte un léger tramage, ce qui peut être recherché sur le plan esthétique.One can in particular use a film welded or bonded to the outer edge of the bottom of the cup, or a completely adhesive film, such a film thus achieving the inviolability of the compact cosmetic preparation in the associated cup. In the case where the film is completely adhesive, one obtains, when the latter is removed, a surface of the compact product which comprises a slight screening, which can be sought from an aesthetic point of view.

On peut également prévoir l'utilisation d'un opercule rigide monté à la place de la pellicule souple, cet opercule pouvant être obtenu par injection et pouvant être solidarisé du fond de la coupelle par encliquetage.One can also provide for the use of a rigid cover mounted in place of the flexible film, this cover can be obtained by injection and can be secured to the bottom of the cup by snap-fastening.

Selon une autre caractéristique du procédé selon l'invention, on peut ménager, dans l'enceinte, en vis-à-vis de la contre-plaque, et en traverse de l'ouverture (ou d'au moins l'une des ouvertures) du fond de la coupelle, au moins une barrette transversale qui sépare des préparations cosmétiques pulvérulentes de différentes natures, et compacter simultanément ces préparations.According to another characteristic of the method according to the invention, it is possible to provide, in the enclosure, facing the counter plate, and passing through the opening (or at least one of the openings ) from the bottom of the cup, at least one transverse bar which separates powdery cosmetic preparations of different natures, and compact these preparations simultaneously.

Selon l'invention, on peut déposer une couche de colle liquide, par exemple thermofusible, sur le fond d'un boîtier capable de recevoir par emboîtement la coupelle renfermant la préparation compacte, le fond de ladite coupelle étant tourné vers l'extérieur, et on laisse alors durcir ladite colle, pour assurer la fixation de la coupelle sur le fond du boîter et sur la bordure interne inférieure de la paroi latérale dudit boîtier, pour constituer le conditionnement final de la préparation compacte.According to the invention, a layer of liquid adhesive, for example hot-melt adhesive, can be deposited on the bottom of a housing capable of receiving by interlocking the cup containing the compact preparation, the bottom of said cup being turned towards the outside, and said adhesive is then left to harden, to ensure the fixing of the cup on the bottom of the case and on the lower internal edge of the side wall of said case, to constitute the final packaging of the compact preparation.

De façon connue, on peut utiliser une préparation cosmétique pulvérulente qui renferme une certaine quantité d'au moins un liant, par exemple de 2 à 15% en poids par rapport à la totalité de la préparation cosmétique pulvérulente. Il peut notamment être utile d'utiliser un (ou des) liant(s) conditionné(s) en microcapsules, lesquelles éclatent lors de la compression, afin de distribuer le liant au sein des particules de poudre.In known manner, it is possible to use a powdery cosmetic preparation which contains a certain amount of at least one binder, for example from 2 to 15% by weight relative to the totality of the powdery cosmetic preparation. In particular, it may be useful to use a binder (s) conditioned in microcapsules, which burst during compression, in order to distribute the binder within the powder particles.

Par ailleurs, selon une caractéristique intéressante de la présente invention, on peut effectuer le compactage à chaud. Dans ce cas, on utilise notamment un piston de compactage équipé d'un dispositif chauffant et on règle la température du piston de compactage à une valeur comprise, par exemple, entre 40 et 30̸0̸°C.Furthermore, according to an advantageous characteristic of the present invention, hot compaction can be carried out. In this case, a compacting piston equipped with a heating device is used in particular and the temperature of the compacting piston is adjusted to a value comprised, for example, between 40 and 30̸0̸ ° C.

Dans le cas où l'on réalise le compactage à chaud et où l'on utilise un liant, pour une préparation cosmétique donnée, on peut choisir un taux de liant inférieur ou égal à celui qui serait choisi pour un compactage sans apport de chaleur, pour obtenir une texture respectivement plus poudreuse ou plus crémeuse de la préparation cosmétique compacte. Le liant, quelle que soit sa forme, se répartit mieux et plus vite au sein de la composition ; on peut en utiliser moins pour une cohésion égale, avec une texture obtenue plus poudreuse.In the case where hot compaction is carried out and a binder is used, for a cosmetic preparation given, it is possible to choose a rate of binder less than or equal to that which would be chosen for compacting without adding heat, in order to obtain a respectively more powdery or more creamy texture of the compact cosmetic preparation. The binder, whatever its form, is distributed better and faster within the composition; less can be used for equal cohesion, with a more powdery texture obtained.

Par ailleurs, dans le cas de la mise en oeuvre d'un compactage à chaude et de l'utilisation d'au moins un liant, on peut prévoir l'utilisation de liants à caractère hydrophobe, comme des cires, que l'on ne pourrait utiliser s'il n'y avait apport de chaleur, ce qui permet d'obtenir des compacts plus hydrophobes, en vue d'un maquillage résistant mieux à l'eau.Furthermore, in the case of the use of hot compaction and the use of at least one binder, provision may be made for the use of hydrophobic binders, such as waxes, which cannot be could use if there was no heat input, which makes it possible to obtain more hydrophobic compacts, for a makeup that is more resistant to water.

Dans le cas où l'on utilise une pellicule de protection, si le compactage s'effectue à chaud, on choisira bien entendu une pellicule capable de résister à la chaleur appliquée.In the case where a protective film is used, if the compaction is carried out hot, a film capable of withstanding the heat applied will of course be chosen.

La présente invention a aussi pour objet une préparation cosmétique compacte obtenue selon le procédé ci-dessus défini.The present invention also relates to a compact cosmetic preparation obtained according to the process defined above.

Pour mieux faire comprendre l'objet de la présente invention, on va en décrire ci-après, à titre purement indicatif et non limitatif, plusieurs modes de réalisation représentés sur le dessin annexé.To better understand the object of the present invention, we will describe below, purely by way of non-limiting example, several embodiments shown in the accompanying drawing.

Sur ce dessin :

  • la figure 1 représente une vue schématique en coupe verticale d'un dispositif de compactage adapté pour la mise en oeuvre du procédé conforme à la présente invention ;
  • la figure 2 est une vue en perspective de la coupelle renferment la préparation cosmétique, telle qu'elle est obtenue en fin de compactage par le dispositif de la figure 1, cette coupelle étant présentée en position retournée afin de montrer le côté de prélèvement du produit compact ;
  • la figure 3 représente, en coupe longitudinale, la coupelle de la figure 1 après mise en place dans un boîtier de présentation ;
  • la figure 4 est une vue analogue à la figure 1 d'un dispositif de compactage réalisé selon une variante ;
  • la figure 5 est une vue analogue à la figure 1 illustrant la possibilité de réaliser des coupelles à plusieurs compartiments ; et
  • la figure 6 représente la vue de dessus de la coupelle de la figure 5, après compactage, montrant les surfaces de prélèvement des produits compactés dans ces compartiments.
On this drawing :
  • FIG. 1 represents a schematic view in vertical section of a compacting device suitable for implementing the method according to the present invention;
  • Figure 2 is a perspective view of the cup containing the cosmetic preparation, as it is obtained at the end of compaction by the device of Figure 1, this cup being presented in the inverted position in order to show the sampling side of the product compact;
  • Figure 3 shows, in longitudinal section, the cup of Figure 1 after placement in a presentation box;
  • Figure 4 is a view similar to Figure 1 of a compacting device produced according to a variant;
  • Figure 5 is a view similar to Figure 1 illustrating the possibility of making cups with several compartments; and
  • Figure 6 shows the top view of the cup of Figure 5, after compacting, showing the sampling surfaces of the compacted products in these compartments.

Si l'on se réfère à la figure 1, on voit que l'on a désigné par 1 une enceinte dans laquelle on a disposé une quantité de poudre 2 destinée à être compactée.Referring to FIG. 1, it can be seen that an enclosure has been designated by 1 in which an amount of powder 2 has been placed intended to be compacted.

Cette poudre peut, par exemple, avoir la composition pondérale suivante :

Figure imgb0001
This powder can, for example, have the following weight composition:
Figure imgb0001

L'enceinte 1 est délimitée par un support horizontal 3, servant de contre-plaque dans l'opération de compactage de la poudre 2, par une coupelle 4 reposant sur ladite contre-plaque 3, et par un manchon tubulaire 5.The enclosure 1 is delimited by a horizontal support 3, serving as a counter-plate in the powder compacting operation 2, by a cup 4 resting on said counter-plate 3, and by a tubular sleeve 5.

La coupelle 4, réalisée en matière plastique par exemple, est constituée par un fond rectangulaire 6, auquel se raccorde une paroi latérale 7 de faible hauteur. La quantité de poudre fluide 2 introduite et les dimensions de la coupelle 4 sont calculées pour que le compactage conduise à un bloc paralléllépipédique plat 8 (figure 3) dont la surface supérieure affleure la bordure libre de la paroi latérale 7 de la coupelle 4.The cup 4, made of plastic for example, is constituted by a rectangular bottom 6, to which is connected a side wall 7 of low height. The quantity of fluid powder 2 introduced and the dimensions of the cup 4 are calculated so that the compaction leads to a flat parallelepiped block 8 (FIG. 3) whose upper surface is flush with the free edge of the side wall 7 of the cup 4.

Cette dernière présente la particularité que son fond 6 comporte une ouverture 9 de forme ellipsoïdale, centrée sur le centre du fond 6 et occupant une surface importante dudit fond.The latter has the particularity that its bottom 6 has an opening 9 of ellipsoidal shape, centered on the center of the bottom 6 and occupying a large surface of said bottom.

Le manchon 5, de section droite rectangulaire correspondant à la section droite interne de la coupelle 4, présente un décrochement 10 de sa paroi interne, à une distance de l'une de ses bordures qui est égale à la hauteur de la coupelle 4.The sleeve 5, of rectangular cross section corresponding to the internal cross section of the cup 4, has a recess 10 from its internal wall, at a distance from one of its edges which is equal to the height of the cup 4.

Pour le compactage, la coupelle 4 repose sur la contre-plaque 3 avec interposition d'une pellicule 11, le manchon 5 venant s'emboîter axialement sur la coupelle 4, de façon que la bordure supérieure libre de celle-ci vienne en butée contre le décrochement 10, les surfaces internes de la paroi 7 et du manchon 5 venant se placer dans le prolongement l'une de l'autre.For compaction, the cup 4 rests on the counter plate 3 with the interposition of a film 11, the sleeve 5 coming to fit axially on the cup 4, so that the free upper edge of the latter abuts against the recess 10, the internal surfaces of the wall 7 and of the sleeve 5 coming to be placed in the extension of one another.

La pellicule 11 est une pellicule en matière plastique très souple ; sa forme et ses dimensions correspondent à celles du fond de la coupelle 4 ; par ailleurs, elle se prolonge latéralement par une languette 12, comme cela est bien visible sur la figure 2. La pellicule 11 est collée par sa bordure sur la périphérie de la paroi externe du fond 6, ou bien elle est totalement adhésive.The film 11 is a very flexible plastic film; its shape and dimensions correspond to those of the bottom of the cup 4; moreover, it is extended laterally by a tongue 12, as is clearly visible in FIG. 2. The film 11 is bonded by its border to the periphery of the external wall of the bottom 6, or else it is completely adhesive.

Dans l'enceinte 1, est monté coulissant, un piston 13, lequel peut être équipé d'un dispositif chauffant 14, par exemple, par une résistance électrique. Ce dispositif 14, facultatif, est représenté en pointillés sur la figure 1.In the enclosure 1, a piston 13 is slidably mounted, which can be equipped with a heating device 14, for example, by an electrical resistance. This optional device 14 is shown in dotted lines in FIG. 1.

Pour le compactage, le piston 13 vient s'appliquer sur la poudre 2, dont le niveau dépasse celui de la bordure supérieure de la coupelle 4 jusqu'à réalisation du compact 8. La pression de compactage est comprise entre 40 et 400 bars et elle est maintenue pendant 1 à 15 secondes. Ensuite, après retrait du piston et retrait du manchon 5, on retire l'ensemble représenté sur la figure 2, constitué par la coupelle 4, le compact 8 et la pellicule 11.For compaction, the piston 13 is applied to the powder 2, the level of which exceeds that of the upper edge of the cup 4 until the compact is produced 8. The compaction pressure is between 40 and 400 bars and it is maintained for 1 to 15 seconds. Then, after removing the piston and removing the sleeve 5, the assembly shown in FIG. 2 is removed, consisting of the cup 4, the compact 8 and the film 11.

On vient alors placer cet ensemble, en position retournée, comme représenté sur la figure 3, dans un boîtier 15 dont le fond plein 16 est raccordé à une paroi latérale 17, la section droite intérieure de ce boîtier 15 étant égale ou légèrement supérieure à la section droite de la coupelle 4.We then place this set, in position returned, as shown in FIG. 3, in a housing 15, the solid bottom 16 of which is connected to a side wall 17, the internal cross section of this housing 15 being equal to or slightly greater than the cross section of the cup 4.

Sur le fond 16 du boîtier 15, on a disposé, avant l'introduction de l'ensemble de la figure 2, une couche de colle thermofusible 18 à l'état liquide. La prise de cette colle permet de réaliser la fixation du compact 8 sur le fond 16 du boîtier 15 ; par ailleurs, la colle thermofusible 18, encore liquide, remonte latéralement contre la paroi 17, pour assurer une solidarisation totale de la coupelle 4 et du boîtier 15.Before the introduction of the assembly of FIG. 2, on the bottom 16 of the housing 15, a layer of hot-melt adhesive 18 has been placed in the liquid state. Taking this adhesive allows the compact 8 to be fixed to the bottom 16 of the housing 15; moreover, the hot-melt adhesive 18, still liquid, rises laterally against the wall 17, to ensure total attachment of the cup 4 and of the housing 15.

A l'utilisation, on retire d'un seul tenant la pellicule 11 en se saisissant de la languette 12 et l'on a alors accès au compact 8 à travers l'ouverture 9 de la coupelle 4. L'accès au produit compact se fait donc par la partie la moins dure du compact 8 et, de ce fait, le prélèvement du produit est plus aisé. Par ailleurs, sont cachés à la vue, les éventuels défauts de la bordure du compact 8, cette bordure étant recouverte par la périphérie du fond 6.In use, the film 11 is removed in one piece by grasping the tongue 12 and there is then access to the compact 8 through the opening 9 of the cup 4. Access to the compact product is therefore made by the less hard part of the compact 8 and, therefore, the removal of the product is easier. Furthermore, any hidden defects of the edge of the compact 8 are hidden from view, this edge being covered by the periphery of the bottom 6.

Dans le conditionnement de la figure 3, le collage du compact 8 sur le fond 16 du boîtier 15, évite une fissuration malencontreuse du compact 8 soit à l'usage, lorsque l'utilisateur est amené à appuyer sur le compact 8, soit au moment du transport.In the packaging of FIG. 3, the bonding of the compact 8 to the bottom 16 of the housing 15, avoids inadvertent cracking of the compact 8 either in use, when the user is required to press the compact 8, or at the time of transportation.

Sur la figure 4, on a représenté une variante de réalisation suivant laquelle la contre-plaque 3a comporte, dans sa région venant en regard de l'ouverture 9 du fond 6 de la coupelle 4, une forme légèrement concave. De cette façon, on obtient un compact 8 légèrement en saillie à travers l'ouverture 9, donnant ainsi un effet esthétique au conditionnement résultant.In FIG. 4, an alternative embodiment is shown according to which the counter plate 3 a has, in its region coming opposite the opening 9 of the bottom 6 of the cup 4, a slightly concave shape. In this way, a compact 8 is obtained which projects slightly through the opening 9, thus giving an aesthetic effect to the resulting packaging.

Sur la figure 5, on a illustré une autre possibilité offerte par la présente invention, à savoir celle de prévoir, dans l'enceinte 1, sur le fond 6 de la coupelle 4, une barrette de séparation transversale 19 menagée entre les deux bords du fond 6, les deux bords longitudinaux dudit fond 6 délimitant l'ouverture 9. Cette barrette 19 constitue une séparation permettant l'introduction, dans l'enceinte, de deux types de substances pulvérulentes, 2a, 2b, différent par exemple par la couleur des pigments qu'elles contiennent, et constituant par exemple des produits de maquillage complémentaires. La barrette 19 peut présenter une forme incurvée, donnant aussi une note esthétique au conditionnement final du compact 8.FIG. 5 illustrates another possibility offered by the present invention, namely that of provide, in enclosure 1, on the bottom 6 of the cup 4, a transverse separation strip 19 formed between the two edges of the bottom 6, the two longitudinal edges of said bottom 6 delimiting the opening 9. This strip 19 constitutes a separation allowing the introduction, into the enclosure, of two types of pulverulent substances, 2 a , 2 b , different for example by the color of the pigments which they contain, and constituting for example complementary makeup products. The bar 19 may have a curved shape, also giving an aesthetic note to the final packaging of the compact 8.

Il est bien entendu que les modes de réalisation ci-dessus décrits ne sont aucunement limitatifs et pourront donner lieu à toutes modifications désirables, sans que l'on s'écarte pour autant du cadre de la présente invention.It is understood that the embodiments described above are in no way limiting and may give rise to any desirable modifications, without thereby departing from the scope of the present invention.

Claims (17)

1. A method for compacting a powder-based cosmetic preparation (2; 2a - 2b) according to which a quantity of the said powdered preparation (2; 2a - 2b) is placed into a container (1) that is open at its upper portion and whose lower portion is delimited by a tray (4) intended to contain the resultant compact cosmetic preparation (8; 8a - 8b) at the end of the operation so as to constitute with the latter an element for packaging the cosmetic preparation, and the compression of the powdered preparation (2; 2a - 2b) is effected in the said container (1), characterized in that a tray (4) is used whose bottom (6) includes at least one opening (9), the said container (1) being delimited in the region of the said opening or openings (9) by a complementary base plate (3 ; 3a) whereon the said tray (4) rest.
2. A method according to claim 1, characterized in that a tray (4) is used whose opening or openings (9) is (or are) out in the central portion of the bottom (6), the edge region of the compact cosmetic preparation (8; 8a - 8b) being protected from the outside in the final package by the peripheral zone of the bottom (6) of the said tray (4).
3. A method according to one of claims 1 or 2, characterized in that a complementary base plate (3a) is used whose surface coming to be opposite the opening (9) (or each opening) of the bottom (6) of the tray (4) is slightly concave, so as to lend a slightly convex surface to the (or each) accessible zone of the compact cosmetic preparation (8; 8a - 8b) projecting in relation to the plane of the outer wall of the bottom (6) of the tray (4).
4. A method according to one of claims 1 to 3, characterized in that a protective flexible backing (11) is disposed between the bottom (6) of the tray (4) and the complementary base plate (3, 3a), which backing is capable of remaining joined to the said tray (4) and its contents (8; 8a - 8b) after the compacting.
5. A method according to claim 4, characterized in that there is used a backing (11) that is welded to the edge of the bottom (6) or a backing (11) that is entirely adhesive, the said backing (11) ensuring that the compact cosmetic preparation (8; 8a - 8b) of the associated tray (4) is tamper-proof.
6. A method according to one of claims 4 or 5, characterized in that a backing (11) is used that can be pulled off in one piece by a lateral pull tab (12).
7. A method according to one of claims 1 to 6, characterized in that provision is made in the container (1) for at least one transverse bar (19) opposite the complementary base plate (3, 3a) and across the opening (9) (or at least one of the openings) of the bottom of the tray (4), which bar separates powdered cosmetic preparations of different kinds intended to be compacted simultaneously in the said tray (4).
8. A method according to one of claims 1 to 7, characterized in that a film of liquid adhesive is deposited on the bottom (16) of a case (15) capable of receiving the tray (4) containing the compact preparation (8; 8a - 8b) by means of nesting, the bottom (6) of the said tray (4) being turned towards the outside and the said glue is allowed to harden to ensure that the tray (4) is fixed to the bottom (16) of the case (15) and to the lower inner edge of the side (17) of the said case (15).
9. A method according to one of claims 1 to 8, characterized in that a powdered cosmetic preparation (2; 2a - 2b) is used which contains from 2 to 15% by weight of at least one binder.
10. A method according to claim 9, characterized in that one uses a binder (or binders) packaged in microcapsules.
11. A method according to one of claims 1 to 10, characterized in that the compacting is effected in a hot state.
12. A method according to claim 11, characterized in that a compacting piston (13) is used which is provided with a heating device (14).
13. A method according to claim 12, characterized in that the temperature of the compacting piston (13) is set to a value comprised between 40 and 300°C.
14. A method according to one of claims 9 or 11, characterized in that for a given powdered cosmetic preparation (2; 2a - 2b) a proportion of binder is chosen that is lower than or equal to that which would be chosen for compacting without the addition of heat.
15. A method according to one of claims 12 to 14, characterized in that at least one binder of a hydrophobic nature is used.
16. A method according to one of claims 1 to 3, characterized in that a rigid lid, capable of remaining joined to the said tray (4) after the compacting, is disposed between the bottom (6) of the tray (4) and the complementary base plate (3, 3a).
17. A compact cosmetic preparation obtained by the method according to one of claims 1 to 16.
EP88402274A 1987-09-29 1988-09-09 Method for compacting a powder-based cosmetic preparation Expired - Lifetime EP0310472B1 (en)

Applications Claiming Priority (2)

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FR8713425 1987-09-29
FR8713425A FR2621008B1 (en) 1987-09-29 1987-09-29 PROCESS FOR THE COMPACTION OF A POWDER-BASED COSMETIC PREPARATION

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DE3871694D1 (en) 1992-07-09
DE3871694T2 (en) 1993-02-04
ES2032038T3 (en) 1993-01-01
FR2621008B1 (en) 1990-03-09
JPH01106807A (en) 1989-04-24
EP0310472A1 (en) 1989-04-05
US4962627A (en) 1990-10-16
CA1308029C (en) 1992-09-29
FR2621008A1 (en) 1989-03-31

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