Laminate Body Color Fields for Opaque Adhesion
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Solution Overview
Problem
Current security and value documents face issues with delamination and the need for opaque cover layers that are thick and lack precision, making them susceptible to tampering and costly to produce, while also failing to achieve sufficient optical opacity and graphic design.
Innovation Solution
A laminate body composed of multiple layers with color fields in parallel planes, where each color field has a color layer area and a free area, ensuring no free area overlaps between planes, allowing for secure adhesion and optical opacity through precise layer alignment and pigment distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If opaque cover layers are used to hide internal devices, then optical opacity is improved, but adhesion between laminate layers deteriorates causing delamination
Solution Approach 1:
The patent divides the cover layer into multiple laminate layers with alternating opaque and transparent regions. The opaque regions (with colorant preparation) provide optical opacity to hide internal devices, while the transparent regions (free areas without colorant) allow light transmission and enable adhesive bonding between layers. This segmentation resolves the contradiction by spatially separating the conflicting requirements of opacity and adhesion.
Solution Approach 2:
Different regions of the cover layer are assigned different optical properties: some areas are made opaque with colorant preparation to conceal internal devices, while other areas remain transparent to maintain adhesion. This local differentiation allows each region to fulfill its specific function without compromising the overall structure.
2Illumination intensity
If thick opaque layers are used to achieve sufficient opacity, then optical opacity is improved, but manufacturing precision deteriorates due to difficulty in achieving planar bonding
Solution Approach 1:
Instead of using a single thick opaque layer, the patent segments the structure into multiple thinner layers with alternating opaque and transparent regions. This segmentation maintains sufficient overall opacity while enabling better planar bonding at each interface, as the transparent regions provide contact areas for firm adhesion between layers.
3Reliability
If opaque cover layers are used to hide internal devices, then security is improved, but device complexity increases due to multiple layers and alignment requirements
Solution Approach 1:
The laminate layers serve multiple functions simultaneously: the opaque regions with colorant preparation provide both optical opacity for hiding internal devices and structural integrity for security, while the transparent regions provide adhesive bonding and potential display functionality. This multi-functionality reduces the need for separate components, thereby managing complexity.
4Illumination intensity
If transparent windows are created by inserting transparent foil sections into opaque laminate layers, then visibility of display elements is improved, but manufacturing complexity increases due to precise insertion requirements
Solution Approach 1:
Instead of inserting transparent sections into opaque layers, the patent inverts the approach by creating opaque regions within a predominantly transparent laminate structure. The colorant preparation is applied selectively to specific regions, eliminating the need for precise insertion of separate transparent foils and simplifying manufacturing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances the security and production efficiency of documents by preventing delamination, achieving sufficient optical opacity, and allowing for graphic design elements, while maintaining adhesive strength and visibility of internal electronic components.
Implementation Method 1
these layers must be relatively thick and, in particular, without gaps... absorb sufficiently in the visible spectral range
Implementation Method 2
the opaque cover layers counteract a firm, planar bond between the surfaces of laminate layers that are in contact with one another
Data Source
Figure 1~2
Figure 3a~3c
AI summary
A laminated body having an opaque region and being made of at least three laminate layers (5, 10, 20, 30, 40, 50) laminated to each other comprises at least two color fields (22, 32, 34) in order to ensure adequate adhesion of the laminate layers. The color fields are arranged one over the other, lie in one of at least two color planes lying parallel to each other within the laminated body and being spaced from each other, and are formed by at least one respective color layer area (221, 321, 341) and at least one free area (222, 322, 342). The at least one color layer area (221, 321, 341) is formed by a colorant preparation. There is no colorant preparation in the at least one free area (222, 322, 342). A free area (342) of a second color field (34) in a second color plane is found above or below none of the at least one free area (322) of a first color field (32) in a first color plane.