Method for the additive manufacture of a three-dimensional object comprising or forming a cosmetic composition by direct projection, and associated apparatus

Patent metadata

Field	Value
Publication number	US-10835457-B2
Application number	US-201515501279-A
Country	US
Kind code	B2
Filing date	Aug 5, 2015
Priority date	Aug 5, 2014
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

The cosmetic composition comprised in the three-dimensional object or forming the three-dimensional object is recoverable after solidifying.

First claim

The invention claimed is:

1. A method for the additive manufacture of a three-dimensional object comprising or forming a structured cosmetic composition, the method comprising the following steps:
(a) heating at least one cosmetic material containing at least one meltable structuring agent in order to melt the or each structuring agent;
(b) depositing a layer comprising one or a plurality of cosmetic materials heated in step (a), the or each structuring agent contained in the cosmetic material(s) being deposited in the molten state;
(c) at least partially solidifying the layer by cooling the or each cosmetic material to a temperature below that of the or each cosmetic material in step (b);
(d) depositing, on the previous layer, an additional layer comprising one or a plurality of cosmetic materials heated in step, the or each structuring agent contained in the cosmetic material(s) being deposited in the molten state;
(e) at least partially solidifying the additional layer by cooling the or each cosmetic material to a temperature below that of the or each cosmetic material in step (b);
(f) repeating steps (d) to (e) until a three-dimensional object comprising or forming a structured cosmetic composition is formed,
the cosmetic composition comprised in the three-dimensional object or forming the three-dimensional object being recoverable after solidifying.

2. The method according to claim 1 , wherein at least one layer, advantageously each layer is produced on the basis of a single cosmetic material heated in step (a) or wherein at least one layer contains a first cosmetic material heated in step (a) and at least one layer, advantageously the same layer, contains a second cosmetic material heated in step (a) that is different to the first cosmetic material.

3. The method according to claim 2 , wherein the melting point of the structured cosmetic composition is between 50° C. and 115° C., particularly between 60° C. and 110° C.

4. The method according to any of claim 2 , wherein the density of the structured cosmetic composition, measured at the melting point thereof, is between 0.7 and 1.

5. The method according to claim 2 , wherein the shrinkage of the structured cosmetic composition, measured between 40° C. and 25° C. is less than 5%.

6. The method according to claim 5 , wherein the or each structuring agent is chosen from waxes, organophilic clays, pyrogenic silicas, fatty acids, pasty compounds, gelling agents, particularly organogelators, thickening agents, glutamide resins, hydrophobic celluloses, tackifying resins, and mixtures thereof.

7. The method according to claim 6 , wherein the cosmetic composition comprises a mass wax content greater than 10%.

8. The method according to claim 1 , wherein at least one cosmetic material heated in step (a) further comprises at least one additional agent, particularly chosen from oils, pastes, pigments, nacres, fillers, surfactants, sequestrants, neutralizing agents, antioxidants, colorants, perfumes, cosmetic active substances, reducing agents.

9. The method according to any of the above claims, wherein the three-dimensional object is a lipstick, a stick, a hybrid powder, a deodorant and/or antiperspirant product, a soap, a face mask, a hair styling wax, and/or a solid perfume.

10. The method according to claim 1 , comprising the deposition of at least one layer comprising a cosmetic composition substrate material that is liquid when heated, to form a substrate of the cosmetic composition, the substrate being non-recoverable.

11. The method according to claim 1 , wherein the deposition step comprises at least partially heated liquefaction of each cosmetic material, feeding each cosmetic material in at least partially liquid form under heat into a nozzle, spraying each cosmetic material in the form of droplets via the nozzle, depositing the sprayed droplets onto a receiving substrate or onto the previous layer, and moving the nozzle in relation to the previous layer or to a surface of the substrate.

12. The method according to claim 1 , wherein a first cosmetic material supplied in step (a) has a first color, a second cosmetic material supplied in step (a) having a second color, the cosmetic composition formed comprising first cosmetic material and second cosmetic material on the same layer or on different layers.

13. The method according to any of the above claims, comprising the following steps:
defining a predetermined shape of a three-dimensional object;
determining the dimensions and local composition of each layer to be produced on the basis of the predetermined shape.

14. An apparatus for manufacturing a three-dimensional object comprising or forming a cosmetic composition, comprising:
a substrate surface;
at least one receiver containing at least one cosmetic material comprising at least one structuring agent, and a system for heating the cosmetic material suitable for melting the or each structuring agent;
at least one nozzle for spraying each cosmetic material;
an assembly for conveying each cosmetic material between the receiver and the nozzle;
an assembly for moving the nozzle relatively in relation to a substrate surface ( 58 );
a control unit suitable for controlling the heating system, the movement assembly and the conveying assembly in order to perform the following steps:
(a) heating at least one cosmetic material containing at least one meltable structuring agent in order to melt the or each meltable structuring agent,
(b) depositing a layer comprising one or a plurality of cosmetic materials heated in step (a), the or each structuring agent being deposited in the molten state;
(c) at least partially solidifying the layer by cooling the or each cosmetic material to a temperature below that of the or each cosmetic material in step (b);
(d) depositing, on the previous layer, an additional layer comprising one or a plurality of cosmetic materials heated in step (a), the or each structuring agent being deposited in the molten state;
(e) at least partially solidifying the additional layer by cooling the or each cosmetic material to a temperature below that of the or each cosmetic material in step (b);
(f) repeating steps (d) to (e) until a three-dimensional object comprising or forming a structured cosmetic composition is formed,
the cosmetic composition comprised in the three-dimensional object or forming the three-dimensional object being recoverable after solidifying.

15. The apparatus according to claim 14 , wherein the receiver associated with each cosmetic material comprises a system for heating the cosmetic material and a stirrer.

16. The method according to claim 3 , wherein the density of the structured cosmetic composition, measured at the melting point thereof, is between 0.7 and 1.

17. The method according to claim 2 , wherein the density of the structured cosmetic composition, measured at the melting point thereof, is between 0.8 and 0.9.

18. The method according to claim 3 , wherein the shrinkage of the structured cosmetic composition, measured between 40° C. and 25° C. is less than 5%.

19. The method according to claim 4 , wherein the shrinkage of the structured cosmetic composition, measured between 40° C. and 25° C. is less than 5%.

Assignees

• Oreal

Inventors

• Jaunet Clément
• Lorente Gonzalez Sonia

Classifications

• B33Y80/00

  Products made by additive manufacturing · CPC title

• A61K8/0229 Primary

  Sticks · CPC title

• B29K2105/0067

  Melt · CPC title

• B29L2031/718

  Cosmetic equipment, e.g. hair dressing, shaving equipment (brushes B29L2031/42, combs B29L2021/005) · CPC title

• A61K8/0233

  Distinct layers, e.g. core/shell sticks · CPC title