Colored Reflective Film Using Particulate Layers for Brighter Reflection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current reflective microsphere films reflect white light and require metallization of microspheres, which is complex and costly, and adding dyes reduces reflected radiation intensity.
Innovation Solution
A reflective film with a second layer containing reflective, colored particles, such as glass or methacrylate crystals, embedded in a polyurethane resin, enhances reflection intensity without metallization, using a three-layer structure with an adhesive third layer for application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If dyes are added to resins or coloured glass microspheres are used, then the film achieves coloured light reflection, but the intensity of reflected radiation is drastically reduced
Solution Approach 1:
The invention divides the reflective function into two separate components: colourless glass microspheres that maintain high reflectivity, and coloured reflective particles embedded in the resin matrix that provide coloration. This segmentation allows each component to perform its function optimally without compromising the other.
Solution Approach 2:
The invention applies local quality by concentrating the coloring function specifically in the resin layer containing reflective particles, while keeping the microspheres themselves colourless. This localized approach to coloration preserves the overall high reflectivity of the film while achieving the desired colored appearance in specific areas.
2Illumination intensity
If metallisation of microspheres is performed, then high-intensity reflection is achieved, but the manufacturing process becomes complex and costly
Solution Approach 1:
The invention replaces the expensive and complex metallized microsphere approach with inexpensive, non-metallized glass microspheres combined with colored reflective particles in the resin. This substitution uses cheaper materials and simpler manufacturing processes while achieving comparable or superior visual effects.
Solution Approach 2:
The invention creates a composite reflective film structure combining colourless glass microspheres with coloured reflective particles embedded in resin material. This composite approach achieves both high reflectivity and coloration through the synergistic combination of different materials, eliminating the need for metallization.
3Illumination intensity
If transparent resin is used to maintain reflection intensity, then high reflectivity is achieved, but the film cannot be produced in coloured versions
Solution Approach 1:
The invention introduces coloured reflective particles as an intermediary element within the transparent resin matrix. These particles act as mediators that provide coloration to the film while allowing the transparent resin to maintain its high reflectivity properties. The intermediary particles enable color variation without compromising the optical performance of the base resin.
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 film achieves high-intensity colored light reflection, visible in both directional and diffused lighting conditions, maintaining production efficiency and reducing costs.
Implementation Method 1
The reflective particles (21) allow a reflected radiation of considerable intensity to be obtained... a considerable percentage of incident radiation reflected by the reflective particles (21) is also added to the percentage of incident radiation that the microspheres reflect
Implementation Method 2
The reflective particles (21) are coloured, in order to obtain the reflection of a coloured light
Data Source
Figure 1
Figure 2
AI summary
A reflective film, comprising: a first layer (1), comprising a plurality of microspheres (ms); a second layer (2) comprising a resin in which the microspheres (ms) are partially embedded; a third layer (3) comprising a resin, associated with the second layer (2) on the opposite side with respect to the first layer (1); the second layer (2) comprises a plurality of reflective particles (21).