Textured Polymer Panel Lamination for Air Pocket Elimination
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Solution Overview
Problem
Conventional methods for coloring translucent or transparent thermoplastic panels face issues such as surface scratches, volatile organic compound emissions, lengthy cure times, high energy consumption, texture visibility, moisture wicking, air entrapment, and recycling challenges, which affect aesthetic and structural integrity.
Innovation Solution
A system involving multiple colored film layers with textured surfaces to prevent air entrapment and enhance bonding, allowing for uniform color distribution and improved light transmission, using textured rollers to apply a uniform texture to the panels, and combining dissimilar resin materials for fusion without additional processing steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If screen printing or painting is used to apply color to panel surfaces, then color application is achieved, but the ink or paint may be scratched off and requires bonding additives that produce VOC emissions
Solution Approach 1:
The patent replaces mechanical screen printing and painting processes with a thermal transfer process where a printed transfer paper is heated, placed in contact with the panel substrate, and the printed color or image is transferred to the substrate through heat and pressure. This substitution eliminates the need for solvent-based bonding additives and reduces VOC emissions while providing more resilient color application.
Solution Approach 2:
The patent utilizes the phase transition of dye from solid to gas phase during heating, allowing the dye to penetrate the substrate surface. The solid sources of dye are heated, the printed color or image is transferred to the substrate, and then cooled, creating a more durable color application that resists surface scratching.
2Reliability
If dye sublimation printing is used to infuse color into panel surfaces, then color resilience to scratches improves and colors may be viewed from either side, but considerable technical expertise and specialized equipment are required
Solution Approach 1:
The patent segments the coloring process into separate functional components: a printed transfer paper containing the color design, a heating element for thermal transfer, and a cooling mechanism. This segmentation allows for more flexible and less capital-intensive equipment compared to traditional dye sublimation systems while achieving similar color resilience and bidirectional viewability.
3Manufacturing precision
If chemical driving of pigment into panel surface is used, then homogeneous color and abrasion resistance are achieved, but large amounts of energy are consumed and process control is complex
Solution Approach 1:
The patent replaces the chemical process of driving pigment into the panel surface with a thermal transfer process. Instead of bombarding the surface with solvent to improve solubility, the patent uses heat and pressure to transfer color from a printed transfer paper, achieving homogeneous color and abrasion resistance with lower energy consumption and simpler process control.
4Adaptability or versatility
If fabric interlayer is used to impart color to panels, then color control is achieved, but fabric texture becomes visible through the panel and transparency is impaired
Solution Approach 1:
The patent uses a thin printed transfer paper film instead of a fabric interlayer to impart color to panels. This thin film approach allows for precise color control while minimizing texture visibility and maintaining panel transparency, as the thin film does not create the same textural interference that thicker fabric layers would produce.
5Ease of manufacture
If conventional lamination is used to bond film layers to substrates, then color application is achieved, but air pockets are trapped between layers affecting aesthetic quality
Solution Approach 1:
The patent introduces a porous intermediate layer between the printed transfer paper and the panel substrate during lamination. This porous layer acts as a pathway for air to escape during the bonding process, preventing air pocket entrapment between layers. The porous structure allows air to be channeled outward while the lamination proceeds, thereby eliminating aesthetic defects caused by trapped air pockets.
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 results in high-quality, aesthetically pleasing panels with reduced air pockets, improved structural integrity, and customizable color and light transmission properties, eliminating the need for complex processing steps and reducing material costs.
Implementation Method 1
each of the film layers has a surface roughness that is substantially greater than a surface roughness of the one or more substrates. The surface roughness of the film layers reduces incidences of air-entrapment between the film layers and the substrates during manufacture of the structure.
Implementation Method 2
The colored film layers can be laminated to the polymer substrate with the use of heat and pressure.
Data Source
AI summary
Implementations of the present invention relate to a translucent and/or transparent polymer-based panel system that incorporates multi-colored insert layers that enable manipulation of color, transparency or light transmission of the finished panel system. Implementations of the present invention also relate to the construction of such panels to avoid the capture and retention of air within the panels through the use of textured surfaces at the lamination interfaces. In addition, implementations of the present invention provide a method of quantifying the optical response achieved in a given panel system and describes types of construction that enable the multiplicity of color and optic manipulation. Furthermore, implementations of the present invention provide methods for applying texture in an efficient, uniform manner.