EP4091500A1 - Applikator mit einer auf spezielle art und weise angebrachten 3d-gedruckten applikatorkomponente - Google Patents

Applikator mit einer auf spezielle art und weise angebrachten 3d-gedruckten applikatorkomponente Download PDF

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Publication number
EP4091500A1
EP4091500A1 EP21175278.7A EP21175278A EP4091500A1 EP 4091500 A1 EP4091500 A1 EP 4091500A1 EP 21175278 A EP21175278 A EP 21175278A EP 4091500 A1 EP4091500 A1 EP 4091500A1
Authority
EP
European Patent Office
Prior art keywords
applicator
applicator component
component
joining material
radiation
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP21175278.7A
Other languages
English (en)
French (fr)
Inventor
Erika VON JAN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Geka GmbH
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 EP21175278.7A priority Critical patent/EP4091500A1/de
Publication of EP4091500A1 publication Critical patent/EP4091500A1/de
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/02—Bristles details
    • A46D1/0207—Bristles characterised by the choice of material, e.g. metal
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B1/00—Brush bodies and bristles moulded as a unit
    • 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
    • A46B3/04—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by mouldable materials, e.g. metals, cellulose derivatives, plastics
    • 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 relates to an applicator for applying a cosmetic, a care product, a pharmaceutical or an adhesive according to the generic concept of claim 1 and to a method for manufacturing such an applicator.
  • Applicators integrally 3D printed from a single material are of limited use.
  • the handle becomes too soft if a material - that is ideal for the bristles - is uncompromisingly chosen, too, for the printing of the handle.
  • the bristles are too hard if, out of consideration of the needs for the handle and its minimum bending stiffness, a harder material is chosen than is actually recommended for 3D printing of the bristles.
  • one-piece applicators in one step that have sections with different material properties - such as a handle or bristle carrier made of a very stiff polymer material and bristles attached to a bristle carrier element made of a very soft, flexible and supple material. It is even more difficult to make a handle from a stiff polymer material that carries different bristle carrier elements made from different flexible materials in sections.
  • the invention is based on the problem of providing an applicator which has at least one 3D printed applicator component which can be mounted with less effort - than previously necessary - on a second applicator component which is manufactured elsewhere, or which is also 3D printed but consists of a different material.
  • the applicator according to the invention is characterized by the fact that it consists of at least one first applicator component made of polymer material.
  • This applicator component has been manufactured by 3D printing. It has a corresponding physical texture, namely that special free surface which is particularly evenly stepped compared to the normal roughness. Said stepping is formed by the adjacent pixels exposed on the surface. The surface thus shows a so called 3D printed texture.
  • the applicator according to the invention is further characterized in that it comprises at least one second applicator component which is materially connected to the first applicator component.
  • the joining material between the first and the second applicator component is made of the same polymer material family as the first applicator component, i.e. from a 3D printing material.
  • this joining material was introduced or inserted between the first and the second applicator component in its uncured state. It was then subsequently cured or solidified/cured, for example by application of radiation and/or thermally conducted heat. This connects the applicator components to each other.
  • the first and/or second applicator component may be designed to be fully or locally permeable to the radiation curing said joining material. The design is then such that the radiation curing said joining material can penetrate into the region of the joining material enclosed between the first and the second applicator components.
  • materials which are "glassy” or partially transparent (opaque) for the corresponding radiation can be used. Not always, but often, these are materials that also appear glassy or opaque to the human eye. Radiation comprises for example thermal radiation via visible radiation or ultraviolet radiation and beyond that, depending from what is used for curing.
  • first and/or second applicator component(s) is (are) wholly or partially configured as a radiation conductor such that the applicator component so configured directs the radiation curing said bonding material into the region of the joining material enclosed between the first and the second applicator components.
  • the parting line filled by the joining material is open to the outside and, in particular, is dimensioned in terms of height in such a way that enough radiation can be introduced via it to allow said joining material to cure completely.
  • the first applicator component is a carrier covered with bristles, application protrusions and/or flock.
  • the second applicator component is then preferably a core connected to a handle.
  • This core may be called a bristle carrier core, an applicator core or a flock carrier core. It is preferably inserted into the first applicator component.
  • At least one applicator component has one or more discrete recesses, preferably visible to the naked eye, which are filled by the cured joining material and create a positive bond between the joining material and the applicator component concerned.
  • one or more protrusions are present which are embedded by the cured joining material and create a form-fitting bond between the joining material and the applicator component concerned.
  • the applicator according to the invention comprises a polymer material, preferably having at least one functional group based on olefin, or amide, or ether, or esther, or urethane, or urethane-acrylate, or urethane-methacrylate, or acrylate.
  • inventive applicator for applying a cosmetic, care or pharmaceutical product or adhesive comprises or is made of a polymer material based on at least one polyolefin, or at least one polyamide, or at least one polyether, or at least one thermoplastic urethane, or at least one thermoplastic elastomer.
  • the first applicator component consists of a polymer material comprising an agent promoting photopolymerization and/or a cross-joining reaction and/or thermal curing
  • the second applicator component consists of a polymer material comprising an agent promoting photopolymerization and/or a cross-joining reaction and/or thermal curing.
  • Protection is also claimed for a method of manufacturing an applicator of the type disclosed herein comprising a first applicator component and at least one second applicator component, characterized in that the first applicator component and the second applicator component are brought into abutment against each other with the inclusion of the uncured material from which the first applicator component or the second applicator component has been printed, and, in a next step, the material enclosed between the first and the second applicator component is cured by the application of light and/or heat.
  • a method comprising the following steps in total: Production of the digital 3-dimensional model of at least one first applicator component forming an applicator element. Formation of the solid 3-dimensional first applicator component by additive manufacturing process. Fixing the fixed 3-dimensional applicator component to a portion of a second applicator component, preferably forming a stem end.
  • Figures 1 to 4 show the first embodiment of the invention.
  • Figure 4 shows the finished applicator 1.
  • the first applicator component 2 of this embodiment is manufactured in the form of a bristle carrier or in the form of a bristle-carrying sleeve.
  • the simple, preferably tapered bristles, as known from injection moulding, may be only shown here as placeholders.
  • Bristles produced by 3D printing will typically have more sophisticated geometries, usually with at least one undercut.
  • the 3D printing of applicators according to the invention is typically carried out from the liquid phase, predominantly hanging. The applicator is thus built up descending from top to bottom. Wherever the radiation used for curing, usually in the form of a laser beam, hits, a pixel is cured from the liquid and welded or connected to the gaggle of pixels created by corresponding previous evaluation operations. This continues until the bristle carrier 2 has the desired shape - for example, the shape shown in Figure 1 .
  • the surface of an applicator component that is to be brought into contact and directly connected to the second applicator component is wetted with the liquid material used for 3D printing of the first applicator component before it can be mounted.
  • the second applicator component in the form of the bristle carrier core is dipped accordingly.
  • the bristle carrier forming the first applicator component here forms a sleeve or sheath which is fitted with the desired bristles on its outer side and into whose inner region, usually in its centre, a bristle carrier core 3 can be inserted.
  • this bristle carrier core 3 is an integral part of the stem or handle 4.
  • the handle 4 is connected to an enlarged handle not shown here. By means of this handle the applicator can be guided by hand.
  • the enlarged handle usually also serves as a closure for the storage container that contains the compound that is applied with the applicator.
  • the applicator components to be joined are matched to each other in such a way that a sufficiently large gap 5 remains between them.
  • the gap 5 is designed to hold sufficient joining material, usually in the form of liquid, to ensure the desired bonding of the first and the second applicator components during the curing process.
  • the first applicator component consists of a material that is essentially impenetrable or only penetrable to a limited extent for the radiation (including infrared light to ultraviolet light in the widest sense) used for curing.
  • the radiation including infrared light to ultraviolet light in the widest sense
  • the second applicator component here in the form of the bristle carrier core
  • the second applicator component is designed as a radiation or light guide.
  • the radiation, as defined above, used for curing or, in particular, the light used for curing is preferably irradiated via the front surface of the second applicator component or the bristle carrier core.
  • the latter transmits the radiation used for curing in the area of the interior of the sleeve or the bristle carrier core and releases it there. In this way, rapid curing, usually over a large area, can take place in the area between the first applicator component and the second applicator component.
  • the second applicator component is a bristle carrier core into which V-shaped notches or grooves are preferably cut. They serve here as special "radiation emission windows", which allow a part of the radiation suitable for curing, which is coupled in via the free front surface of the bristle carrier core, to escape into the area of the joining material, which lies between the first and the second applicator component. This is indicated by the radiation arrows in Fig.15 .
  • the first applicator component from a radiation- or light-conducting, transparent or sufficiently opaque material, at least in certain areas. In this way, it is then possible to apply radiation, for example, in a radial direction.
  • the radially directed radiation penetrates the sleeve or the casing of the bristle carrier. In this way, it reaches the area between the bristle carrier and the bristle carrier core in order to harden the joining material located there.
  • the second applicator component shown here in the form of the bristle carrier core
  • the first applicator component shown here in the form of the bristle carrier
  • a pumping effect usually occurs. Air enclosed in the bristle carrier is compressed. As long as there is no other way out, it escapes via the gap 5 between the bristle carrier or its sleeve or casing and the core of the bristle carrier.
  • This effect can be used to ensure that the joining material in the bristle carrier sleeve or sheath - especially if it is in the form of 3D printing fluid - is pressed outwards through the gap 5. In this way it can be achieved that the gap 5 is filled everywhere and evenly with this liquid at the end of the insertion of the bristle carrier core.
  • FIGS 7 and 8 show how this can be done.
  • Figure 8 uses a bristle carrier that forms a sleeve open at both ends of the strands or a sheath open at both ends. In this way, the pumping effect is eliminated. In addition, this construction has the advantage that light or other radiation used for curing can be introduced along the gap 5 from both ends for the purpose of curing.
  • the second applicator component in the form of the bristle carrier core has recesses 8, preferably in the radial direction.
  • joining material collects which, in the course of its curing, forms complementary protrusions which then permanently rest in the recesses 8 of the bristle carrier core.
  • the second applicator component here in the form of the bristle carrier core, has protrusions 9 that are embraced by the joining material. As the joining material cures, these protrusions 9 become permanently embedded in the joining material. In this way, a positive form fit connection is achieved which provides a firm hold between the connecting material and the second applicator component even if no adhesion and/or chemical reaction occurs.
  • the second applicator component can of course have openings that are completely "flooded" by the joining material and then also provide the desired form fit after curing.
  • Figures 9 to 11 show a second embodiment of an applicator according to the invention, whereby here, for example, flocking is used as bristles in the broadest sense.
  • a cosmetic and/or healthcare pack comprising an applicator according to any one of the claims submitted along with this application at the time of first filing.
EP21175278.7A 2021-05-21 2021-05-21 Applikator mit einer auf spezielle art und weise angebrachten 3d-gedruckten applikatorkomponente Pending EP4091500A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21175278.7A EP4091500A1 (de) 2021-05-21 2021-05-21 Applikator mit einer auf spezielle art und weise angebrachten 3d-gedruckten applikatorkomponente

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21175278.7A EP4091500A1 (de) 2021-05-21 2021-05-21 Applikator mit einer auf spezielle art und weise angebrachten 3d-gedruckten applikatorkomponente

Publications (1)

Publication Number Publication Date
EP4091500A1 true EP4091500A1 (de) 2022-11-23

Family

ID=76444219

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21175278.7A Pending EP4091500A1 (de) 2021-05-21 2021-05-21 Applikator mit einer auf spezielle art und weise angebrachten 3d-gedruckten applikatorkomponente

Country Status (1)

Country Link
EP (1) EP4091500A1 (de)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070033760A1 (en) * 2005-08-11 2007-02-15 Geka Brush Gmbh Applicator especially for mascara
US20070186950A1 (en) * 2004-08-06 2007-08-16 Georg Roeder Applicator and process for the production of an applicator
DE102007049574A1 (de) * 2007-10-16 2009-04-23 Schwan-Stabilo Cosmetics Gmbh & Co. Kg Aufgespritzte Applikatoren
US20090214284A1 (en) * 2006-12-21 2009-08-27 Gueret Jean-Louis H Applicator for applying a cosmetic product to keratinous material
US20100307529A1 (en) * 2007-08-31 2010-12-09 Geka Brush Gmbh Part of a cosmetic unit
US20110164914A1 (en) * 2009-12-08 2011-07-07 L'oreal Applicator for applying a composition to the eyelashes and/or the eyebrows
US20200237086A1 (en) * 2019-01-25 2020-07-30 Albea Services Applicator for cosmetic product, in particular mascara, associated applicator assembly and method for manufacturing such an applicator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070186950A1 (en) * 2004-08-06 2007-08-16 Georg Roeder Applicator and process for the production of an applicator
US20070033760A1 (en) * 2005-08-11 2007-02-15 Geka Brush Gmbh Applicator especially for mascara
US20090214284A1 (en) * 2006-12-21 2009-08-27 Gueret Jean-Louis H Applicator for applying a cosmetic product to keratinous material
US20100307529A1 (en) * 2007-08-31 2010-12-09 Geka Brush Gmbh Part of a cosmetic unit
DE102007049574A1 (de) * 2007-10-16 2009-04-23 Schwan-Stabilo Cosmetics Gmbh & Co. Kg Aufgespritzte Applikatoren
US20110164914A1 (en) * 2009-12-08 2011-07-07 L'oreal Applicator for applying a composition to the eyelashes and/or the eyebrows
US20200237086A1 (en) * 2019-01-25 2020-07-30 Albea Services Applicator for cosmetic product, in particular mascara, associated applicator assembly and method for manufacturing such an applicator

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