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EP3288770B2 - Élément de sécurité à structure multicouche - Google Patents
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EP3288770B2 - Élément de sécurité à structure multicouche - Google Patents

Élément de sécurité à structure multicouche Download PDF

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Publication number
EP3288770B2
EP3288770B2 EP16716825.1A EP16716825A EP3288770B2 EP 3288770 B2 EP3288770 B2 EP 3288770B2 EP 16716825 A EP16716825 A EP 16716825A EP 3288770 B2 EP3288770 B2 EP 3288770B2
Authority
EP
European Patent Office
Prior art keywords
layer
security element
security
dielectric
element according
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.)
Active
Application number
EP16716825.1A
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German (de)
English (en)
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EP3288770A1 (fr
EP3288770B1 (fr
Inventor
Giselher Dorff
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.)
Giesecke and Devrient Currency Technology GmbH
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Giesecke and Devrient Currency Technology GmbH
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Application filed by Giesecke and Devrient Currency Technology GmbH filed Critical Giesecke and Devrient Currency Technology GmbH
Publication of EP3288770A1 publication Critical patent/EP3288770A1/fr
Publication of EP3288770B1 publication Critical patent/EP3288770B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/351—Translucent or partly translucent parts, e.g. windows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/373—Metallic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers
    • B42D25/465—Associating two or more layers using chemicals or adhesives

Definitions

  • the invention relates to a security element for security papers, value documents or the like, which consists of an interference-capable, multilayer structure, wherein the interference-capable, multilayer structure has a reflection layer, a dielectric layer and a partially transparent layer, wherein the dielectric layer is arranged between the reflection layer and the partially transparent layer.
  • a generic security element is, for example, from the WO 2005/108110 A1 or the WO 2005/038136 A1 known.
  • the viewer perceives a certain color that changes as the viewing angle changes.
  • the color shift is caused by an interference effect between the light rays reflected from the surface of the outer partially transparent layer and the light rays that pass through the outer partially transparent and middle dielectric layers and are reflected back to the partially transparent layer by the reflective layer.
  • the light rays are then either transmitted outwards or reflected again at the partially transparent layer, so that in this case the light rays are reflected back and forth between the reflective layer and the partially transparent layer several times.
  • the light rays that have passed through the thin film layer have therefore traveled a longer path than the light rays reflected on the surface of the thin film layer, so that they are phase-shifted relative to them when they interfere with them. If the light rays incident on the thin film layer hit the thin film layer at different angles of incidence, the path traveled by the light rays in the thin film layer is of different lengths. This difference results from the path difference of the rays reflected multiple times within the thin film layer, which is changed by the angle of incidence. The phase position of the interfering light rays therefore varies depending on the angle of incidence, so that depending on the angle of incidence, different colors or shades of the resulting light beam perceived by the observer result, a so-called color shift effect.
  • Such a generic security element is also referred to as a thin film layer interference layer structure or color shift element due to the way it works.
  • the invention is therefore based on the object of developing a generic security element in such a way that the disadvantages of the prior art are eliminated and the protection against counterfeiting is further increased.
  • the reflection layer of the interference-capable, multilayer structure is formed by a color layer or a further multilayer structure, wherein the color layer and the multilayer structure are designed such that they show a metallic color tone in incident light and a colorful color tone in transmitted light.
  • a color layer with a metallic color tone is a color layer which has a metallically reflective surface with a metallic color tone, which is preferably golden, silver or bronze.
  • a color layer with a colorful shade is a color layer which has a single or multi-colored surface, preferably a single-color blue, a single-color green or a single-color red.
  • Transmitted light occurs when an object is illuminated from one side and viewed from the other. Incident light occurs when an object is illuminated and viewed from the same side.
  • the color layer contains platelet-shaped metallic particles whose longest edge length is 15 nm to 1000 nm and whose thickness is 2 nm to 100 nm, so that the color layer has a golden color in reflected light and a blue color in transmitted light.
  • the platelet-shaped metallic particles preferably have a longest edge length of 15 nm to 600 nm and particularly preferably 20 nm to 500 nm and a thickness of 2 nm to 40 nm and particularly preferably 4 nm to 30 nm.
  • a color layer is for example made of WO 2011/064162 A2 and is also called gold-blue color.
  • the invention thus replaces the reflective layer of a color shift element known from the prior art with a color layer with platelet-shaped metallic particles or with a further multilayer structure made up of at least two semi-transparent mirror layers and at least one dielectric layer arranged between the at least two mirror layers.
  • reflected light both the color layer with platelet-shaped metallic particles and the further multilayer structure show a golden color tone, thus reflect the incident light and act like a reflective layer.
  • the security element according to the invention therefore shows the color shift effect known from the prior art in reflected light.
  • transmitted light however, both the color layer with platelet-shaped metallic particles and the further multilayer structure show a blue color tone and do not reflect the incident light or only reflect it insignificantly.
  • the security element according to the invention therefore shows a blue color tone and no color shift effect.
  • At least one of the dielectric layers of the interference-capable, multilayer structure is made of silicon dioxide (SiO2).
  • the partially permeable layer of the interference-capable, multilayer structure preferably consists of at least chromium and/or nickel in the embodiment according to claim 1 and at least chromium and/or nickel in the embodiment according to claim 3.
  • a dielectric layer can consist of a transparent printed layer that has a constant thickness.
  • the invention further relates to a see-through security element for security papers, value documents and the like, with a carrier and a security element according to the invention applied to the carrier.
  • a carrier is in particular a transparent or translucent plastic film.
  • a lacquer layer can be arranged between the security element and the carrier, which preferably consists of an embossing lacquer.
  • an embossing lacquer can be, for example, a UV lacquer, i.e. a lacquer that hardens under the influence of ultraviolet light, or a thermoplastic embossing lacquer. Diffractive structures, holograms or micromirrors are preferably embossed into this embossing lacquer.
  • the thickness of this lacquer layer is 1 ⁇ m to 12 ⁇ m, preferably 2 ⁇ m to 7 ⁇ m.
  • Translucency in the sense of this invention means that an object, such as the substrate or the plastic film, allows a certain proportion of incident light to pass through. If light hits one side of the object, a certain proportion of the light is allowed to pass through to the other side of the object and exits there again. The greater the percentage of light passing through, based on the incident light, the more translucent the object is. If the percentage is at least 90%, i.e. the object allows the incident light to pass through almost unattenuated, like a window, the object is referred to as transparent. On the other hand, an object that allows less than 10% and preferably about 0% of the incident light to pass through, i.e. where the proportion of light passing through, based on the incident light, is low or close to or equal to zero, is referred to as opaque or non-transparent.
  • a security paper, value document or the like particularly preferably consists of a substrate made of paper made of cotton fibers, as is used for banknotes, for example, or of other natural fibers or of synthetic fibers or a mixture of natural and synthetic fibers, or of at least one plastic film.
  • the substrate also preferably consists of a combination of at least two different substrates arranged one above the other and connected to one another, a so-called hybrid.
  • the substrate here consists, for example, of a combination of plastic film-paper-plastic film, i.e. a substrate made of paper is covered on each of its two sides by a plastic film, or of a combination of paper-plastic film-paper, i.e. a substrate made of a plastic film is covered on each of its two sides by paper.
  • the document DE 102 43 653 A9 states in particular that the paper layer usually has a weight of 50 g/m 2 to 100 g/m 2 , preferably 80 g/m 2 to 90 g/m 2 .
  • the paper layer usually has a weight of 50 g/m 2 to 100 g/m 2 , preferably 80 g/m 2 to 90 g/m 2 .
  • any other suitable weight can be used depending on the application.
  • Security papers, value documents or the like in which a security element according to the invention can be used are in particular Banknotes, shares, bonds, certificates, vouchers, cheques, high-value tickets, but also other papers at risk of counterfeiting, such as passports and other identification documents, as well as cards, such as credit or debit cards, whose card body has at least one layer of security paper and also product security elements, such as labels, seals, packaging and the like.
  • value document includes all of the above-mentioned materials, documents and product security devices.
  • front or “back” of a substrate, security paper or value document are relative terms that can also be referred to as “one” and “the opposite" side and that make up the majority of the total surface of the substrate, security paper or value document. These terms expressly do not include the side surfaces of a substrate, security paper or value document, which are negligible when the thickness of a substrate or value document is only about one millimeter for card bodies or only fractions of a millimeter for banknotes, and which usually cannot or will not be provided with security elements or coatings. In particular, see-through effects cannot be achieved with the side surfaces.
  • the security element according to the invention shows a viewer information in reflected light and in transmitted light.
  • Information in the sense of this invention is a patterned and visually perceptible coating. This can, for example, form a graphic image, a picture, a number, a letter, text or other characters.
  • the information particularly preferably consists of positive and/or negative motifs.
  • a motif element itself is applied to the substrate, whereas in the case of a negative motif, the area surrounding the motif element is applied to the substrate.
  • a positive motif is, for example, a letter printed in dark color on the light substrate.
  • a negative motif is, for example, an area applied to the substrate in dark color, which has an unprinted area in the form of a letter within the area.
  • the advantages of the invention are explained using the following exemplary embodiments and the supplementary figures.
  • the exemplary embodiments represent preferred embodiments, to which the invention is not intended to be limited in any way.
  • the representations in the figures are highly schematic for the sake of better understanding and do not reflect the real conditions.
  • the proportions shown in the figures do not correspond to the conditions in reality and serve solely to improve clarity.
  • the embodiments described in the following exemplary embodiments are reduced to the essential core information for the sake of better comprehensibility. In practical implementation, much more complex patterns or images can be used.
  • Fig.1 shows a side view of a security element according to the invention with a partially transparent layer 3 and a reflection layer 1, between which a dielectric layer 2 is arranged. These three layers together form a thin film layer interference layer structure.
  • the reflection layer 1 consists of a color layer that contains platelet-shaped metallic particles whose longest edge length is 15 nm to 1000 nm and whose thickness is 2 nm to 100 nm, so that this color layer shows a golden color in incident light and a blue color in transmitted light.
  • a viewer 9 who looks at the security element from the front side 7 of the security element looks at the partially transparent layer 3 of the interference-capable, multi-layer structure.
  • the viewer 9 therefore sees a color shift effect in incident light, i.e. with illumination 11 from the front side 7, in which the color of the security element changes from purple to green, for example, when the security element is tilted.
  • incident light i.e. with illumination 11 from the front side 7
  • the color shift effect disappears and the viewer 9 sees the security element in a blue color.
  • a viewer 10 who looks at the security element from the back 8 of the security element looks at the color layer with platelet-shaped metallic particles.
  • the viewer 9 thus sees the security element in a golden color in incident light, ie with an illumination 12 from the back 8, and the security element in a blue color in transmitted light, ie with an illumination 11 from the front 7. Color.
  • Fig. 2 shows a side view of a security element according to the invention, in which the reflection layer 1, in contrast to the security element made of Fig.1 consists of a further multi-layer structure which has two semi-transparent mirror layers 4 and 6 and at least one dielectric layer 5 arranged between the two mirror layers.
  • the two semi-transparent mirror layers 4 and 6 preferably each consist of a thin layer of aluminum and the dielectric layer 5 of SiO 2 .
  • the same effect is obtained in incident and transmitted light from both the front side 7 and the back side 8 as for the observer from Fig.1 .
  • Fig.3 shows the security element according to the invention Fig.1 , which is attached to a carrier 16 with a lacquer layer 15.
  • the lacquer layer 15 preferably consists of a UV lacquer, the carrier 16 preferably of a plastic film.
  • the security element with the reflective layer 1 is attached to the carrier 16 via the lacquer layer 15 and according to Fig. 3b with the partially permeable layer 3.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Credit Cards Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Optical Filters (AREA)

Claims (8)

  1. Élément de sécurité destiné à des papiers de sécurité, des documents de valeur ou analogues, qui comprend une structure multicouche susceptible d'interférence, la structure multicouche susceptible d'interférence comportant une couche de réflexion (1), une couche diélectrique (2) et une couche partiellement transparente (3), la couche diélectrique (2) étant disposée entre la couche de réflexion (1) et la couche partiellement transparente (3), caractérisé en ce que la couche de réflexion (1) comprend une couche de couleur, qui contient des particules métalliques en forme de plaquettes, dont la plus grande longueur de côté vaut 15 nm à 1000nm et dont l'épaisseur vaut 2 nm à 100 nm, de telle manière que la couche de couleur présente en lumière réfléchie une tonalité métallique et en lumière transmise une tonalité colorée.
  2. Élément de sécurité selon la revendication 1, caractérisé en ce que les particules métalliques en forme de plaquettes présentent une plus grande longueur de côté de préférence de 15 nm à 600 nm et de manière particulièrement préférée de 20 nm à 500 nm et une épaisseur de préférence de 2 nm à 40 nm et de manière particulièrement préférée de 4 nm à 30 nm.
  3. Élément de sécurité destiné à des papiers de sécurité, des documents de valeur ou analogues, qui comprend une structure multicouche susceptible d'interférence, la structure multicouche susceptible d'interférence comportant une couche de réflexion (1), une couche diélectrique (2) et une couche partiellement transparente (3), la couche diélectrique (2) étant disposée entre la couche de réflexion (1) et la couche partiellement transparente (3), caractérisé en ce que la couche de réflexion (1) comprend une autre structure multicouche, qui comporte au moins deux couches réfléchissantes semi-transparentes (4, 6) et au moins une couche diélectrique (5) disposée entre les deux couches réfléchissantes, de telle manière que l'élément de sécurité comprend une structure multicouche susceptible d'interférence comprenant au moins cinq couches disposées l'une au-dessus de l'autre, la couche de réflexion (1) présentant, lors d'une mesure de la transmission de lumière non polarisée dans le domaine des longueurs d'onde bleues de 420 nm à 490 nm, une résonance avec une demi-largeur de 70 nm à 150 nm, les au moins deux couches réfléchissantes semi-transparentes (4, 6) étant formées d'aluminium ou d'un alliage d'aluminium et la couche d'espacement diélectrique satisfaisant avec une épaisseur h et un indice de réfraction v à la relation 120 nm < h·v < 190 nm, ou les au moins deux couches réfléchissantes semi-transparentes (4, 6) étant formées d'argent ou d'un alliage d'argent et la couche d'espacement diélectrique satisfaisant avec une épaisseur h et un indice de réfraction v à la relation 120 nm < h·v < 170 nm ou 340 nm < h·v < 400 nm, la couche partiellement transparente (3) comprenant au moins du chrome et/ou du nickel.
  4. Élément de sécurité selon la revendication 3, caractérisé en ce que la résonance est la seule résonance située dans le domaine visible.
  5. Élément de sécurité selon au moins une des revendications précédentes, caractérisé en ce qu'au moins une des couches diélectriques (2, 5) comprend une couche d'impression transparente ou du dioxyde de silicium.
  6. Élément de sécurité selon au moins une des revendications 1 ou 2, caractérisé en ce que la couche partiellement transparente (3) comprend au moins du chrome et/ou du nickel.
  7. Élément de sécurité en transmission destiné à des papiers de sécurité, des documents de valeur et analogues, comprenant un support (16) et un élément de sécurité selon au moins une des revendications 1 à 6 appliqué sur le support (16).
  8. Élément de sécurité en transmission selon la revendication 7, caractérisé en ce qu'une couche de vernis (15), qui comprend de préférence un vernis de gaufrage, est disposée entre l'élément de sécurité et le support (16).
EP16716825.1A 2015-04-28 2016-04-11 Élément de sécurité à structure multicouche Active EP3288770B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015005446.5A DE102015005446A1 (de) 2015-04-28 2015-04-28 Sicherheitselement mit Mehrschichtstruktur
PCT/EP2016/000597 WO2016173696A1 (fr) 2015-04-28 2016-04-11 Élément de sécurité à structure multicouche

Publications (3)

Publication Number Publication Date
EP3288770A1 EP3288770A1 (fr) 2018-03-07
EP3288770B1 EP3288770B1 (fr) 2019-06-26
EP3288770B2 true EP3288770B2 (fr) 2024-08-21

Family

ID=55755558

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16716825.1A Active EP3288770B2 (fr) 2015-04-28 2016-04-11 Élément de sécurité à structure multicouche

Country Status (4)

Country Link
EP (1) EP3288770B2 (fr)
CN (1) CN107531082B (fr)
DE (1) DE102015005446A1 (fr)
WO (1) WO2016173696A1 (fr)

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WO2018210597A1 (fr) 2017-05-15 2018-11-22 Basf Se Procédé pour la préparation de couches de nanoparticules métalliques et leur utilisation pour des éléments décoratifs ou de sécurité
CN110945084B (zh) 2017-07-20 2022-05-10 巴斯夫欧洲公司 膦酸酯表面官能化的二氧化钛纳米颗粒
US11643561B2 (en) 2017-07-28 2023-05-09 Basf Se Process for the preparation of metallic nano-particle layers and their use for decorative or security elements
EP3870381A1 (fr) 2018-10-25 2021-09-01 Basf Se Compositions comprenant des nanoplaquettes d'argent
CN113302064A (zh) 2019-01-21 2021-08-24 巴斯夫欧洲公司 安全元件
EP3917703A1 (fr) * 2019-01-29 2021-12-08 Basf Se Élément de sécurité
US12515253B2 (en) 2019-05-06 2026-01-06 Basf Se Compositions, comprising silver nanoplatelets
EP4031496A1 (fr) 2019-09-17 2022-07-27 Basf Se Nanoparticules d'oxyde métallique
US20230241675A1 (en) 2020-04-23 2023-08-03 Basf Se Compositions, comprising platelet-shaped transition metal particles
CN115867614A (zh) 2020-08-21 2023-03-28 巴斯夫欧洲公司 具有高折射率的可uv固化涂层
DE102020007728A1 (de) 2020-12-17 2022-06-23 Giesecke+Devrient Currency Technology Gmbh Datenträger mit Verbundsubstrat mit einem in einem Durchsichtsbereich angeordneten Sicherheitselement
AU2022216794A1 (en) 2021-02-03 2023-09-21 Basf Se Compositions, comprising silver nanoplatelets
CN115230277A (zh) * 2021-04-25 2022-10-25 中钞特种防伪科技有限公司 薄膜元件、透明防伪元件、及数据载体
US20240287281A1 (en) 2021-05-12 2024-08-29 Basf Se Compositions, comprising platelet-shaped transition metal particles
WO2023072740A1 (fr) 2021-10-26 2023-05-04 Basf Se Procédé pour la production d'éléments d'interférence
EP4234641A1 (fr) 2022-02-25 2023-08-30 Basf Se Compositions comprenant des nanoparticules de dioxyde de titane modifiées et leurs utilisations
CN119731276A (zh) 2022-07-11 2025-03-28 巴斯夫欧洲公司 具有高折射率的可uv固化涂层
EP4709544A1 (fr) 2023-05-08 2026-03-18 Basf Se Compositions comprenant des nanoplaquettes d'argent

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EP3288770A1 (fr) 2018-03-07
EP3288770B1 (fr) 2019-06-26
CN107531082B (zh) 2019-06-25
DE102015005446A1 (de) 2016-11-03
CN107531082A (zh) 2018-01-02
WO2016173696A1 (fr) 2016-11-03

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