WO2021164910A1 - Applicateur de produit cosmétique comprenant différentes sections d'applicateur ancrées l'une à l'autre par complémentarité de forme - Google Patents

Applicateur de produit cosmétique comprenant différentes sections d'applicateur ancrées l'une à l'autre par complémentarité de forme Download PDF

Info

Publication number
WO2021164910A1
WO2021164910A1 PCT/EP2020/083528 EP2020083528W WO2021164910A1 WO 2021164910 A1 WO2021164910 A1 WO 2021164910A1 EP 2020083528 W EP2020083528 W EP 2020083528W WO 2021164910 A1 WO2021164910 A1 WO 2021164910A1
Authority
WO
WIPO (PCT)
Prior art keywords
applicator
cavity
section
applicator section
layer
Prior art date
Application number
PCT/EP2020/083528
Other languages
English (en)
Inventor
Erika VON JAN
Original Assignee
Geka Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Geka Gmbh filed Critical Geka Gmbh
Priority to EP20811012.2A priority Critical patent/EP4106976A1/fr
Publication of WO2021164910A1 publication Critical patent/WO2021164910A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
    • B29C64/124—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
    • A46B3/005—Bristle carriers and bristles moulded as a unit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y10/00—Processes of additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y80/00—Products made by additive manufacturing
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/10—For human or animal care
    • A46B2200/1046—Brush used for applying cosmetics
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/10—For human or animal care
    • A46B2200/1046—Brush used for applying cosmetics
    • A46B2200/1053—Cosmetics applicator specifically for mascara

Definitions

  • the invention concerns a process for manufacturing a cosmetic applicator according to the generic term of claim 1.
  • the invention is based on the task of creating an innovative method of manufacture. With the help of this new method, it will also be possible to connect those sections of the applicator that were previously considered to be unconnectable or at least not to be connectable without costly mechanical assembly or expensive moltrusion.
  • the problem is solved by a method according to the first main claim.
  • the method for manufacturing a cosmetic applicator uses a first applicator section made of a first material.
  • This first applicator section can be prefabricated by a suitable procedure. Injection moulding or 3D printing can also be used.
  • Said first applicator section has a cavity. This is preferably undercut .
  • a second applicator section is connected to the first applicator section.
  • This second applicator section is generated in situ from a fluidic material.
  • the material can be cured by electromagnetic radiation .
  • the first step of the inventive method is to fill or flood the cavity of the first applicator section with the second fluidic material.
  • the filling is carried out without or predominantly without the second material hardening in layers during the filling process. This way, the second material is first filled into the cavity as a "bulk", so to speak.
  • a first layer is produced by curing, which spans the entire or substantially entire mouth of the cavity.
  • curing takes place pixel by pixel or point by point.
  • This layer is part of the upcoming second applicator section.
  • the curing of this layer is complete or essentially complete. In the latter case, a final heat treatment for complete curing may follow.
  • the electromagnetic radiation applied to the first and at least some subsequent layers is selected and/or adjusted and/or applied in such a way that it also cures the material located deeper in the cavity. This is usually done before the second applicator section is completed. At this point,
  • curing is understood to mean complete curing or in any case predominant curing.
  • the basis of the invention is the insight that for this special compound one has to leave the dogma of 3D printing, that one layer has to be hardened before the next layer is applied. Once this has been understood, a form-fit connection can be produced very efficiently using a 3D printing process. This also applies if the applicator sections to be connected are extremely small in size and therefore elude the methods known so far for connecting applicator sections.
  • the invention is surprising. Until now it has been assumed that 3D printing fails where a substrate with a cavity several millimeters deep is to be printed. A cavity that has a mouth on only one side, or even a noticeable undercut, or a cavity that is narrow because its mouth diameter is only as large or smaller than its depth. This is what the invention is all about.
  • the problem now overcome was that in such a narrow or undercut cavity it was not possible to cure material layer by layer. In such cases there is no or almost no possibility to apply the bundled electromagnetic radiation within the cavity in such a way that a defined layer by layer curing takes place.
  • This material which remains fluid at first, forms a support in the cavity, which is still movable within itself.
  • This support carries a top layer or film which is reached by the bundled electromagnetic radiation and can thus be cured.
  • a first cap-like layer can be cured.
  • the material which normally lies above this layer and fills the cavity is enclosed, although it is still fluid.
  • the decisive point here is that when the first layer and all or some of the subsequent layers harden, at least some of the electromagnetic radiation applied radiates through said layers.
  • the radiation thus penetrates into the cavity and the uncured material trapped there.
  • a particularly strong bond is achieved when the second material is chosen in such a way that it expands in the cavity permanently during curing.
  • the electromagnetic radiation is adjusted and applied in such a way that the complete positive connection occurs before the second applicator section is completed. If this is not the case, then the electromagnetic radiation is at least adjusted and applied in such a way that a temporary positive connection occurs.
  • This is a connection that is at least so resilient that the applicator can be handled for subjecting it to a subsequent heat treatment, such as tempering. This then leads to complete curing.
  • first and the second fluidic material are usually different. In exceptional cases, however, they can also be identical. This may be the case if it is only a matter of creating a joint.
  • a strict layered structure is particularly advantageous for the invention. In a broader sense, however, this term also refers to a deliberatelyfuzzy" structure. This can be a structure that also leads to a de facto layered structure in the end. Such a construction can take place, where a layer or a foundation already exists, according to the divise "here a pixel on the foundation is hardened, at a distance from it another pixel on the foundation is hardened, and finally - again at a distance from it - a third pixel on the foundation is hardened.”
  • a first applicator section is used as substrate for carrying out the process according to the invention, which provides a build-up surface next to the mouth of the cavity.
  • the production of said first layer is started at the side of the build-up surface next to the mouth of the cavity. This is where the first layer, which is in the process of being created, is attached to the build-up surface to produce the second applicator section.
  • Temporary attachment can also be sufficient instead of a final attachment. This will be the case, for example, if the second applicator section is later to be detached from the first applicator section because a joint is to be formed between the two applicator sections around which the two applicator sections can move relative to each other.
  • said first layer is extended laterally so that it spans the cavity in the end.
  • the second fluidic material is initially exposed to electromagnetic radiation only or essentially only in the area of the mouth in such a way that it hardens. Then there is no need for said build-up surface next to the cavity. Instead, the soffit or inner boundary edge of the cavity holds the first layer, which closes the cavity, in position so that further layers can be built up.
  • an undercut cavity it is particularly advantageous to make the mouth of said cavity narrower in the first applicator section than the rest of the cavity. Ideally, the mouth is so narrow that the part of the second applicator section located in the cavity and firmly connected to the external rest of the second applicator section cannot be pulled out of the cavity non-destructively.
  • first material and the second material are chosen in such a way that they do not stick or weld together significantly even during the hardening of the second material.
  • the design of the substrate and the process control are chosen in such a way that the first applicator section holds the second applicator section in a positive fit after it has cured.
  • the first section of the applicator forms a socket in which a ball of the second section of the applicator can slide.
  • the Shore D hardness of the first and second material is different. This applies to ready-to-use applicators, i.e. after curing. It is particularly favourable if said Shore hardnesses differ by at least 10 %, better by at least 25 %.
  • the first applicator section which serves as substrate for the process, has an undercut cavity.
  • this shape has a hollow sphere, a hollow cone section or a hollow triangle that widens inwards from said mouth.
  • Figure 1 shows the first applicator section forming the substrate with its cavity at a stage where the inventive process begins.
  • Figure 2 shows the applicator section as shown in Figure 1 at a stage of the process in which the first layer is being formed, which becomes part of the second applicator section.
  • Figure 3 shows the development process of the second applicator section in an advanced process stage.
  • Figure 4 shows the same process stage as Figure 2, but an alternative approach is used to create the first layer.
  • Figure 5 shows the same process stage and procedure as Figure 4, but on an alternative substrate.
  • Figure 6 shows the same procedural stage as Figure 3, but here a ball joint applicator is produced.
  • Figures 1 to 3 show a first preferred embodiment of the invention .
  • a flowable, preferably liquid plastic material is used for the additive, layerwise or pixelwise production of the second applicator section 8.
  • this plastic material or centreplastic is photosensitive.
  • the plastic in question can be cured by electromagnetic radiation in such a way that it no longer remains a flowable liqiud.
  • Electromagnetic radiation can be at least predominantly thermal radiation, optically perceptible light or UV radiation, or a mixture thereof. In all this it is advantageous, but not absolutely necessary, that the flowable, photosensitive plastic is completely or solely cured with the aid of electromagnetic radiation.
  • the photosensitive plastic may be such that (at least if it is exposed to a sufficiently warm environment) it cures by itself once the curing process has been triggered by the exposure to electromagnetic radiation.
  • Figure 1 shows the first step of the inventive process.
  • a first applicator section 1 is used to perform this procedure.
  • This first applicator section 1 may have been manufactured in an appropriate manner. If necessary, it is produced externally before the start of the process described here. For example, an injection moulding process can be used to produce the first applicator section 1. Alternatively, the first applicator section 1 may already have been produced by an additive process, such as 3D printing.
  • This first applicator section 1 consists of a first plastic.
  • the first applicator section 1 has an undercut cavity 2.
  • the undercut cavity 2 is preferably formed by a hollow sphere or a hollow body essentially corresponding to a hollow sphere.
  • the hollow sphere or hollow body can change into a tapered section towards the mouth 5. If necessary, the tapered section can almost be omitted. This will be the case if, for example, a hollow sphere is used which is open towards the outside due to its mouth which forms a section through the sphere.
  • the undercut cavity 2 is completely filled with a fluidic second plastic. It is the second plastic thatis used to manufacture the second applicator section 8. It is easy to see that this filling should take place without the second plastic penetrating into the cavity or undercut cavity 2 being cured layer by layer. Instead, the second plastic initially remains fluidic in the entire interior of the cavity 2. This is because it is usually not possible or too costly to insert the fluidic second plastic layer by layer into the undercut cavity 2 and immediately cure it layer by layer or pixel by pixel.
  • Figure 2 shows the next step carried out within the framework of this preferred embodiment of the inventive process.
  • a first layer 6 is applied.
  • the application of the first layer is preferably carried out in such a way that the beginning of the first layer is attached or at least temporarily attached or tacked to the build-up surface 4 laterally adjoining the cavity 2 of the first applicator section 1. It goes without asying that an appropriate beam guidance is provided for.
  • the layer 6 is build step by step by the fact that on its lateral flank further fluidic material is attached by local curing.
  • layer 6 grows beyond the mouth 5 of the cavity until it rests on the other side of the cavity again on the build-up surface 4 there. It may also be reattached there or temporarily attached.
  • the end result is a hardened layer 6, which lies like a kind of lid or foil over the mouth 5 of cavity 2.
  • the cured layer 6 then closes the mouth 5 of the cavity 2.
  • the hardening effect of the laser beam used here is not strictly limited to the area of layer 6 shown in Figure 2. Instead, the effect of the laser beam in the direction of the incident beam extends beyond layer 6.
  • the laser beam preferably used here also cures a certain area of the second plastic, which is hold in a fluidal state in the cavity 2 above layer 6. At least, the laser beam triggers the curing process here.
  • the second step described above is now repeated several times in order to build up the second applicator section 8 layer by layer from the second plastic, by stepwise curing.
  • a part of the energy introduced by the laser beam repeatedly crosses the several layers 6 (or the superimposed pixels) and penetrates in the beam direction, preferably scattered into cavity 2.
  • the second plastic in cavity 2 can be cured completely or essentially completely. This is usually achieved before the second applicator section 8 is completely finished.
  • Figure 3 illustrates this.
  • the initially still fluidic second plastic in cavity 2 has thus become an integral solid component of the second applicator section 8 or core 9. This ensures that the second applicator section 8 is securely and positively anchored to the first applicator section 1. It therefore no longer matters if the mere attachment or tacking of the first layer 6 to the build-up surface 4 is loosened again.
  • the core 9 in this preferred but not obligatory case carries bristles 10 for application purposes.
  • L is the longitudinal axis of the applicator.
  • Figure 4 illustrates a second preferred embodiment, which is ultimately a variant of the procedure described above. With the exception of the difference in the conduct of proceedings described below, the above applies mutatis mutandis to this embodiment.
  • the difference to the first version is that the layer structure is started differently.
  • the first layer 6 produced by curing is not started over the build-up surface 4. It is therefore not temporarily secured in its position by itself being attached or stapled to the build-up surface 4.
  • the first layer 6, which is in the process of being produced is supported or attached at the soffit or inner boundary edge of its mouth 5, i.e. at the embrasure of the mouth 5 inside the cavity 2.
  • layer 6 is continuously expanded. This expansion takes place "pixel by pixel", attaching more and more second plastic to its lateral edge by curing. This is continued until the mouth 5 is finally completely closed by the first layer 6 produced in this way.
  • Figure 5 illustrates a third preferred embodiment, which is ultimately a variant of the procedure described above. With the exception of the difference in the conduct of proceedings described below, what has been said previously in regard to the first and second embodiments applies mutatis mutandis.
  • the embodiment in Figure 5 differs from that in Figure 4 only in that a first applicator section 1 with a more skilful design has been used to carry out the procedure.
  • the cavity has its smallest diameter or narrowest area directly at the level of its mouth 5 and not (as with Fig. 4) only in the area of the interior of cavity 2 and thus above the mouth 5.
  • FIGS 5 and 6 show a variant of the first embodiment of the inventive process, which has just been described. Accordingly, what is said there also applies here, unless otherwise stated in the following explanations.
  • an applicator core 9 As one can see here, on the first layer 6, shown in Figure 5, further layers (or pixel clusters) have been applied which form an applicator core 9.
  • the assembly was carried out in such a way that the applicator core 9 is hold apart through the joint gap 12 from the build-up surfaces 4, which are no longer used for the layer assembly.
  • the applicator core 9 is integrally connected in one piece with the meanwhile completely or largely cured second plastic, which flooded cavity 2 and which was initially trapped there - still in a fluidic state.
  • cavity 2 now forms a fixed joint ball.
  • first and the second plastic are chosen in such a way that they do not permanently bond with each other, cavity 2 now forms a joint socket which holds the joint ball of the second applicator section 8 rotatably.
  • the inventive method can also be used for manufacturing a single pivotably anchored bristle or bristles.
  • a second applicator section in the sense of the invention can also be a single bristle having a foot or root portion that forms a ball joint like portion as shown by the figures of this application.
  • the same kind of pivotable joint can be used for a hedge-hog like bristled crown which may be carried by the forehead, (tree and face) of the bristle carrying rod or core of the applicator.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)

Abstract

L'invention concerne un procédé de préparation d'un applicateur de produit cosmétique doté d'une première section d'applicateur (1) d'un premier matériau, et d'une deuxième section d'applicateur (8) d'un deuxième matériau fluidique durcissable par un rayonnement électromagnétique reliée à celle-ci, la première section d'applicateur (1) possédant une cavité (2), de préférence en contre-dépouille, tandis que la cavité (2) de la première section d'applicateur (1) est remplie, dans une étape initiale, du second deuxième matériau fluidique, puis une première couche (6) qui s'étend sur l'embouchure (5) de la cavité (2) et fait partie de la deuxième section d'applicateur (8) est durcie. Des couches supplémentaires qui forment la deuxième section d'applicateur (8) sont déposées sur la première couche (6) de telle sorte que le matériau dans la cavité (2), de préférence en contre-dépouille, est également durci ou durci davantage par un rayonnement électromagnétique (7) ainsi appliqué sur les couches susmentionnées.
PCT/EP2020/083528 2020-02-18 2020-11-26 Applicateur de produit cosmétique comprenant différentes sections d'applicateur ancrées l'une à l'autre par complémentarité de forme WO2021164910A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20811012.2A EP4106976A1 (fr) 2020-02-18 2020-11-26 Applicateur de produit cosmétique comprenant différentes sections d'applicateur ancrées l'une à l'autre par complémentarité de forme

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20157929.9 2020-02-18
EP20157929 2020-02-18

Publications (1)

Publication Number Publication Date
WO2021164910A1 true WO2021164910A1 (fr) 2021-08-26

Family

ID=69784014

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/083528 WO2021164910A1 (fr) 2020-02-18 2020-11-26 Applicateur de produit cosmétique comprenant différentes sections d'applicateur ancrées l'une à l'autre par complémentarité de forme

Country Status (2)

Country Link
EP (1) EP4106976A1 (fr)
WO (1) WO2021164910A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1881812A1 (fr) * 2005-05-19 2008-01-30 The Procter and Gamble Company Systeme de composition cosmetique avec effets benefiques d'epaississement
US20080219748A1 (en) * 2007-02-21 2008-09-11 Chanel Parfums Beaute Method for manufacturing a cosmetic applicator, an applicator, a package including the applicator, and a batch of applicators
US20130276812A1 (en) * 2010-10-27 2013-10-24 Geka Gmbh Applicator device for applying a cosmetic, applicator element therefor, and cosmetic unit comprising the applicator device
WO2018072034A1 (fr) * 2016-10-21 2018-04-26 Mosaic Manufacturing Ltd. Élément d'assemblage, procédés d'assemblage, et systèmes associés pour la fabrication additive

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1881812A1 (fr) * 2005-05-19 2008-01-30 The Procter and Gamble Company Systeme de composition cosmetique avec effets benefiques d'epaississement
US20080219748A1 (en) * 2007-02-21 2008-09-11 Chanel Parfums Beaute Method for manufacturing a cosmetic applicator, an applicator, a package including the applicator, and a batch of applicators
US20130276812A1 (en) * 2010-10-27 2013-10-24 Geka Gmbh Applicator device for applying a cosmetic, applicator element therefor, and cosmetic unit comprising the applicator device
WO2018072034A1 (fr) * 2016-10-21 2018-04-26 Mosaic Manufacturing Ltd. Élément d'assemblage, procédés d'assemblage, et systèmes associés pour la fabrication additive

Also Published As

Publication number Publication date
EP4106976A1 (fr) 2022-12-28

Similar Documents

Publication Publication Date Title
JP3895788B2 (ja) 移植物品を製造するための方法
ES2565212T3 (es) Elemento protésico integrado
US20170217100A1 (en) Method and Apparatus for Fabricating an Object
KR101280246B1 (ko) 의치 시스템, 틀니의 작성 방법 및 보수 방법
US5074792A (en) Prosthesis for devitalized tooth
JP7532041B2 (ja) 三次元製品の付加製造の方法
JPH05344986A (ja) 金属製多孔質表層を有する移植片及びその製法
WO2006056980A2 (fr) Procede et accessoire destines a la preparation d'une couronne ou d'un bridge dentaire
JP2020056304A (ja) トンネルを作るための建築要素、そのような要素を備えるトンネル、並びに、そのような要素及びそのようなトンネルを建築する方法
WO2021164910A1 (fr) Applicateur de produit cosmétique comprenant différentes sections d'applicateur ancrées l'une à l'autre par complémentarité de forme
EP2789769B1 (fr) Elément de réparation destiné à être fixé à un logement d'un panneau de coffrage, méthode de réparation d'un panneau de coffrage et planche de coffrage réparée
DK179387B1 (en) A method for attaching two window components
JP2010216080A (ja) コンクリート打ち継ぎ用目地材、及び防水施工方法
CN108237326A (zh) 接合构造体及其制造方法
CN109891035A (zh) 提供覆盖元件的方法及覆盖屋顶窗的铰链部分的覆盖元件
JP2009287249A (ja) コンクリート部材の接合方法、ｐｃ部材の接合方法、コンクリート部材の接合構造、ｐｃ部材
JP6985717B2 (ja) ピンニング工法
KR100446257B1 (ko) 구조재 및 그 접합방법
KR100469292B1 (ko) 콘크리트 구조물의 방수처리방법
EP3157460B1 (fr) Base de prothèse et procédé pour relier par liaison de matière au moins une dent artificielle à une base de prothèse
UA127122C2 (uk) Система робочих органів для 3d-друку елементів будівель та споруд та для згладжування і обробки рідинами їх поверхонь (варіанти)
EP0910312A1 (fr) Valvule cardiaque prothetique
EP2485683B1 (fr) Bille à énucléation et procédé de fabrication d'une telle bille
CN106121058B (zh) 一种预制混凝土拼接构件的制备方法
KR100519939B1 (ko) 콘크리트 구조물 신·구 단면확대를 위한 특수앵카 및 그 설치공법

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20811012

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2020811012

Country of ref document: EP

Effective date: 20220919