Process for manufacturing a false nail

Patent metadata

Field	Value
Publication number	US-2019104823-A1
Application number	US-201716091893-A
Country	US
Kind code	A1
Filing date	Apr 6, 2017
Priority date	Apr 8, 2016
Publication date	Apr 11, 2019
Grant date	—

Abstract

The present invention relates to a process for manufacturing a false nail, comprising the following steps: a) producing by additive manufacture, from 3D digital data originating from the acquisition of a relief, especially that of the finger intended to receive the false nail, a mold using a first material, b) depositing onto the mold a layer formed from at least one adhesive composition, c) depositing onto the mold at least one layer of a coating of a second material, different from the first, so as to form the false nail.

First claim

1 : A process for manufacturing a false nail, comprising:
a) producing by additive manufacture, from 3D digital data originating from the acquisition of a relief, a mold using a first material, b) depositing onto the mold a layer formed from at least one adhesive composition, c) depositing onto the mold at least one layer of a coating of a second material, different from the first, so as to form the false nail.

2 : The process as claimed in claim 1 , further comprising extracting the false nail from the mold by at least one of physical and chemical degradation of at least part of the mold.

3 : The process as claimed in claim 2 , wherein the at least one of the physical and chemical degradation is at least partly performed by heating at least part of the first material.

4 : The process as claimed in claim 2 , wherein the at least one of the physical and chemical degradation at least partly is a mechanical degradation consisting in hollowing out.

5 : The process as claimed in claim 2 , wherein the at least one of the physical and chemical degradation is at least partly a chemical degradation, consisting of selective dissolution of the first material using a solvent that is inert toward the adhesive composition and the second material.

6 : The process as claimed in claim 5 , wherein said solvent is chosen from alkanes, ketones, ethers, and esters.

7 : The process as claimed in claim 1 , wherein the depositing the adhesive composition is performed using a method chosen from the group consisting of 2D printing, 3D printing, spraying, dipping and transfer.

8 : The process as claimed in claim 1 , wherein the depositing the coating onto the mold is performed so as to at least partly cover the layer of adhesive composition.

9 : The process as claimed in claim 1 , wherein the depositing the coating onto the mold is performed so as to cover at least one zone of the mold not covered with the layer of adhesive composition.

10 : The process as claimed in claim 1 , wherein b) and c) of the process are performed such that the layer of adhesive composition has a different pattern from that formed by the coating.

11 : The process as claimed in claim 10 , wherein the layer of adhesive composition forms a pattern extending over all or part of the periphery of the pattern formed by the coating.

12 : The process as claimed in claim 1 , wherein the deposition of coating is performed using a method chosen from the group consisting of thermoforming, 2D printing, 3D printing, injection, dipping and transfer.

13 : The process as claimed in claim 1 , wherein the second material is, before deposition onto the mold, in solid form, or in liquid form dissolved partially or totally crosslinked.

14 : The process as claimed in claim 1 , further comprising a step of cutting-out of the false nail.

15 : The process as claimed in claim 14 , wherein the cutting-out of the false nail is performed manually or automatically.

16 : The process as claimed in claim 1 , in which the acquisition of the relief comprises scanning of the end of a user's finger, followed by isolation of a nail part of said scan resulting in the creation of 3D digital data, and the creation of a 3D object forming the mold from the 3D digital data.

17 : The process as claimed in claim 1 , wherein the first material is a hot-melt material.

18 : The process as claimed in claim 17 , wherein said hot-melt material has a melting point between 45° C. and 200° C.

19 : The process as claimed in claim 18 , wherein the hot-melt material is chosen from waxes, thermoplastic polymers and/or semicrystalline polymers.

20 : The process as claimed in claim 1 , wherein the adhesive composition comprises at least one adhesive compound and a solvent.

21 : The process as claimed in claim 20 , wherein the adhesive compound is chosen from pressure-sensitive adhesives, dissolved adhesives, and glues.

22 : The process as claimed in claim 1 , wherein the second material different from the first material is chosen from thermoplastic polymers and thermosetting polymers.

23 : The process as claimed in claim 22 , further comprising exposing the coating layer to the radiation of a UV lamp.

24 : The process as claimed in claim 1 , wherein the additive manufacture is 3D printing or stereolithography.

25 : A false nail obtained by the manufacturing process as claimed in claim 1 .

26 : A machine for additive manufacture, used for performing the process as claimed in claim 1 , configured for the 3D printing of the mold and the coating.

27 : The machine as claimed in claim 26 , further comprising a 3D scanner so as to scan the mold coated with an adhesive in order to print the coating on the adhesive.

28 : A process for manufacturing a false nail intended to cover a user's nail, comprising:
1) producing, by at least one of additive manufacture, printing and by cutting-out, after 2D or 3D digital data acquisition of the nail, in a coating material comprising at least one partially crosslinked compound, a preform having at least one surface portion substantially equal to the developed surface of the nail, 2) finalizing the crosslinking of said coating material.

29 - 51 . (canceled)

52 : A false nail obtained by performing the process as claimed in claim 28 .

53 : A process for manufacturing a false nail, comprising:
i. production, from 2D or 3D digital data of the nail, of a preform forming a reservoir having at least one surface portion substantially equal to the developed surface of a user's nail, ii. deposition onto at least one of the nail and the preform of a solidifiable composition to allow it to become filled with solidifiable composition, the latter comprising at least one of a partially crosslinked compound and a non-crosslinkable reactive compound, iii. positioning of the preform on the nail, iv. solidification of the solidifiable composition via at least one of finalization of crosslinking of the partially crosslinked compound and reaction of the non-crosslinkable reactive compound, so as to obtain the false nail.

54 - 73 . (canceled)

74 : The process as claimed in claim 53 , comprising:
production of the preform forming the reservoir, deposition onto the preform forming the reservoir of a solidifiable composition comprising a crosslinkable reactive compound, exposure to UV radiation of the preform so that the reactive compound is partially crosslinked, deposition onto the nail of the solidifiable composition comprising the crosslinkable reactive compound or of another composition, positioning of the preform on the nail, exposure to UV radiation of the preform on the nail so as to finalize the crosslinking of the reactive compound.

75 : The process as claimed in claim 53 , further comprising:
production of the preform forming the reservoir, deposition onto the nail of a solidifiable composition comprising a crosslinkable reactive compound, positioning of the preform on the nail, exposure to UV radiation of the preform on the nail so that the reactive compound is partially crosslinked, deposition onto the preform of the solidifiable composition or of another composition, exposure to UV radiation of the preform so as to obtain crosslinking of the reactive compoun

Assignees

• Oreal

Inventors

• Giron Franck
• Samain Henri
• Ducastin Pierre

Classifications

• B33Y80/00

  Products made by additive manufacturing · CPC title

• B29C41/22

  Making multilayered or multicoloured articles · CPC title

• B33Y50/00

  Data acquisition or data processing for additive manufacturing · CPC title

• B29C41/42

  Removing articles from moulds, cores or other substrates {(B29C33/444 and B29C37/0017 take precedence)} · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title