Laminated Panel Interlayer Structure for Heat Shielding and Light Contrast
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Solution Overview
Problem
Laminated panel structures with incorporated light control films suffer from reduced contrast difference between maximum and minimum visible light transmittance due to the use of special glass for heat shielding, compromising the heat shielding and light control functionality.
Innovation Solution
An interlayer film structure for laminated panels comprising a thermoplastic resin sheet with a light control component sandwiched between two thermoplastic resin layers, ensuring a visible light transmittance difference of 20% or more and total solar transmittance of 70% or less, with at least one layer containing a heat shielding material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If special glass (infrared reflecting plate glass) is used for heat shielding, then heat shielding property is improved, but visible light transmittance is reduced, resulting in small contrast difference
Solution Approach 1:
The patent divides the heat shielding function into two separate components: (1) a light control film that provides visible light transmittance control with high contrast difference, and (2) an interlayer film containing heat shielding material (such as metal oxide particles) that provides heat shielding. This segmentation allows each component to optimize its specific function without compromising the other, resolving the contradiction between heat shielding and visible light transmittance contrast.
Solution Approach 2:
The patent introduces an interlayer film as an intermediary component between the light control film and the glass panels. This interlayer film contains heat shielding materials (metal oxide particles such as ATO, ITO, GZO, IZO, AZO) that shield infrared radiation while allowing the light control film to maintain its visible light transmittance contrast function. The intermediary interlayer film thus enables both heat shielding and high contrast visible light control simultaneously.
2Reliability
If special glass is used to inhibit heat deterioration of light control film, then reliability is improved, but visible light transmittance contrast is reduced
Solution Approach 1:
The patent separates the heat protection function from the glass and assigns it to the interlayer film containing heat shielding materials. This segmentation allows the light control film to be protected from heat deterioration by the interlayer film's heat shielding capability, while the light control film itself maintains its full visible light transmittance contrast performance without being compromised by glass-related transmittance reduction.
Solution Approach 2:
The interlayer film acts as an intermediary protective layer that shields the light control film from thermal damage. Contains heat shielding materials that absorb or reflect infrared radiation before it reaches the light control film, thereby preventing heat deterioration while maintaining the optical performance and contrast difference of the light control film.
3Loss of energy
If infrared reflecting plate glass is used, then total solar transmittance is reduced, but visible light transmittance contrast difference becomes small
Solution Approach 1:
The patent segments the solar control function into two distinct layers: (1) the light control film that manages visible light transmittance with high contrast difference, and (2) the interlayer film with heat shielding materials that manages total solar transmittance and infrared radiation. This segmentation allows independent optimization of each function, enabling low total solar transmittance while maintaining high visible light transmittance contrast difference.
Solution Approach 2:
The patent applies local quality by giving different optical properties to different layers: the interlayer film is designed with heat shielding materials that specifically target infrared radiation and total solar energy reduction, while the light control film is optimized for visible light transmittance control. This localized functional differentiation allows the system to achieve low total solar transmittance without compromising visible light contrast.
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
Achieves a sufficient contrast difference between maximum and minimum visible light transmittance while effectively shielding heat, enhancing the laminated panel's functionality and durability.
Implementation Method 1
a light control component that is disposed with being sandwiched inbetween the thermoplastic resin sheet... a difference in visible light transmittance between upon driving of the light control component and upon non-driving thereof being 20% or more
Implementation Method 2
either upon driving of the light control component or upon non-driving thereof, a total solar transmittance (Tts) being 70% or less... effectively shielding heat
Data Source
Figure 1~2
Figure 3~4
AI summary
Provided are: an interlayer film structure for a laminated panel capable of obtaining a sufficient contrast difference between the maximum visible light transmittance and the minimum visible light transmittance upon control of the light transmittance while having the effect of shielding heat, and a laminated panel structure. The interlayer film structure for a laminated panel of the invention is an interlayer film structure 1 to be used with being sandwiched between two transparent panels 30 and 31, including thermoplastic resin sheets 20 and 21 and a light control component 10 that is disposed with being sandwiched inbetween the thermoplastic resin sheets 20 and 21, in laminated glass fabricated by bonding the two clear glass plates 30 and 31 via the interlayer film structure for laminated glass, a difference in visible light transmittance between upon driving of the light control component and upon non-driving thereof being 20% or more, and either upon driving of the light control component or upon non-driving thereof, a total solar transmittance (Tts) being 70% or less.