Abstract:
The invention relates to a multi-layer body (1) comprising a first layer (13) having a multiplicity of first zones (21), which are respectively separated from one another by one or a plurality of transparent second zones (22). The multi-layer body has a second layer (14) composed of a transparent material, said second layer being arranged below the first layer (13), and a reflection layer (15) arranged below the second layer (14). The second layer (14) has a multiplicity of third zones (23), in each of which a microstructure (17) is impressed into the interface—facing away from the first layer—between the second layer (14) and the reflection layer, which is covered with the reflection layer (15). Each of the microstructures (17) is configured such that it reflects back and/or diffracts back light incident perpendicularly with respect to the plane spanned by the first layer from the direction of the first layer in the region of the respective third zone (23) onto a region of the first layer whose area is smaller than the area of the respective third zone (23) by at least a factor of 10. The microstructures (17) are arranged in accordance with a microstructure grid having a distance between adjacent microstructures in a second spatial direction of less than 300 μm.
Abstract:
A security element (1), in particular value document, and a process for producing same are described. The security element has a pattern area (21), consisting of one or more design elements (22), the shape of which provides a first optically perceptible item of information. It furthermore has a background area (20) surrounding the one or more design elements of the pattern area at least in areas. The security element (1) has an opaque reflective layer which is not provided in the background area (20), and in the pattern area (21) is provided in first zones (31), but not in second zones. The first zones (31) are spaced apart from each other by less than 300 μm and have a minimum dimension of less than 300 μm.
Abstract:
Described are various processes for the production of multi-layer bodies having at least one partially shaped functional layer and at least one further partially shaped layer and the multi-layer bodies produced in that way. The multi-layer body has at least one partially shaped functional layer in register relationship with at least one further partially shaped layer, which preferably supplement each other to provide a geometric, alphanumeric, pictorial, graphic or figurative colored representation.
Abstract:
The invention relates to a method of generating a laser marking in a security document by means of at least one laser beam, the security document having at least one laser-markable layer and also at least one reflecting layer which overlaps at least partly with the at least one laser-markable layer and has opaque regions. The at least one reflecting layer has at least one transparent region and, at least visually, is not significantly altered by the laser treatment of the laser-markable layer.
Abstract:
Described is a process for the production of a multi-layer body having a volume hologram with at least two different items of image information, wherein a photosensitive layer (46) of the multi-layer body is directly or with the interposition of a transparent optical medium (44s, 45) brought into contact with the front side of a master (44), in which interlaced regions with different asymmetrical surface structures or kinoform structures are shaped, which embody the at least two different items of image information. The photosensitive layer (46) and the master are exposed with a coherent light beam (47) whereby a volume hologram is formed in the photosensitive layer (46). Also described are a master for the production of the multi-layer body and a security element having said multi-layer body.
Abstract:
The invention concerns a method of transferring a multi-layer body onto a substrate and a transfer film and a method of producing a transfer film. A transfer film (8) is provided, which has a carrier film (81), a single-layer or multi-layer decorative layer and a release layer (82) which permits separation of the decorative layer from the carrier film. A first portion (35) of the decorative layer forms the multi-layer body to be applied to the substrate. The transfer film (8) and a release film (91) are placed upon each other. A first adhesive layer (86) arranged between the decorative layer and the release film (91) is activated in a second portion (36) of the decorative layer, that adjoins the first portion (35) of the decorative layer that is associated with the multi-layer body and however in the first portion (35) of the decorative layer is not activated, is not provided or is deactivated. The release film (91) is pulled off the transfer film (8), wherein the second portion (36) of the decorative layer, in which the first adhesive layer (86) is activated, adheres to the release film (91) and is pulled off the carrier film with the release film, and the first portion (35) of the decorative layer remains on the carrier film (81). The transfer film is then placed on the substrate and the first portion of the decorative layer, that is not released with the release film (91) from the carrier film (81), is applied to the substrate.
Abstract:
Described is a process for the production of a multi-layer body having a volume hologram with at least two different items of image information, wherein a photosensitive layer (46) of the multi-layer body is directly or with the interposition of a transparent optical medium (44s, 45) brought into contact with the front side of a master (44), in which interlaced regions with different asymmetrical surface structures or kinoform structures are shaped, which embody the at least two different items of image information. The photosensitive layer (46) and the master are exposed with a coherent light beam (47) whereby a volume hologram is formed in the photosensitive layer (46). Also described are a master for the production of the multi-layer body and a security element having said multi-layer body.
Abstract:
There is described a method of surface modification and/or volume modification of a microstructure at and/or in the material of an object, wherein firstly the microstructure is produced at and/or in the material of the object and then volume contraction of the material for reduction of the relative structure dimensions of the microstructure of the object is effected. Very fine microstructures can be produced comparatively simply and inexpensively by means of the method according to the invention.
Abstract:
The invention concerns a film having at least one electrical component and a process for the production of such a film. An adhesive layer comprising a radiation-cross-linkable adhesive is applied to a base film. The adhesive layer is applied to the base film in a form of being structured in pattern form and/or is irradiated in pattern form in such a way that the adhesive layer hardens with structuring in pattern form. A transfer film which comprises a carrier film and an electrical functional layer is applied to the adhesive layer. The carrier film is pulled off the film body comprising the base film, the adhesive layer and the electrical functional layer, wherein in a first region structured in pattern form the electrical functional layer remains on the base film and in a second region structured in pattern form the electrical functional layer remains on the carrier film and is pulled off the base film with the carrier film.
Abstract:
A binding agent for molding compositions and molded bodies produced by reacting a low molecular weight lignin from the Organosolv process with phenol in a weight ratio of 1:20 to 3:1 at 100.degree. to 180.degree. C., adjusting the pH to an acidic value and condensing the mixture with 0.2 to 0.9 moles of formaldehyde per mole of phenol at 60.degree. to 120.degree. C. to form the binding agent useful for producing curable molding compositions, high-temperature molding compositions, refractory products, textile fleeces and friction coatings as well as carbon materials.