Laminated Glass Interlayer Film with Lanthanoid Complex
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Solution Overview
Problem
Interlayer films for laminated glass using lanthanoid complexes with polydentate ligands containing halogen atoms do not emit light at the expected high intensity due to interactions with potassium, sodium, and magnesium, which reduce the light-emitting properties.
Innovation Solution
Incorporating a lanthanoid complex with a polydentate ligand containing a halogen atom into a light-emitting layer of the interlayer film, with controlled amounts of potassium, sodium, and magnesium, specifically limiting their total concentration to 50 ppm or less, and using a thermoplastic resin like polyvinyl acetal, to enhance light emission intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If lanthanoid complex with polydentate ligand containing halogen atom is used as light-emitting material, then light emission intensity should be high, but actual light emission intensity is reduced due to interaction with potassium, sodium, and magnesium
Solution Approach 1:
The patent extracts and removes harmful metal ions (potassium, sodium, magnesium) from the interlayer film composition to eliminate their detrimental effects on the luminescence of the lanthanoid complex. By controlling the content of these metal ions to be not more than 50 ppm in total, the harmful interactions are prevented, allowing the lanthanoid complex to exhibit its high light emission intensity as expected.
Solution Approach 2:
The patent changes the concentration parameter of metal ions (potassium, sodium, magnesium) in the interlayer film from conventional levels to a controlled level of not more than 50 ppm in total. This parameter change eliminates the harmful effects on the lanthanoid complex luminescence while maintaining the light-emitting function, thereby resolving the contradiction between expected and actual light emission intensity.
2Illumination intensity
If conventional interlayer film composition is used, then manufacturing is easier, but light emission intensity is insufficient for high contrast image display
Solution Approach 1:
The patent specifies a precise parameter range for metal ion content (not more than 50 ppm in total for potassium, sodium, and magnesium) to achieve high light emission intensity. This parameter control requirement, while adding manufacturing complexity, ensures the interlayer film can display high contrast images with sufficient luminous intensity, resolving the contradiction between ease of manufacture and light emission performance.
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 interlayer film achieves high contrast and luminous intensity when irradiated, effectively displaying images with improved light-emitting properties by minimizing the detrimental effects of potassium, sodium, and magnesium on the lanthanoid complex.
Implementation Method 1
a light emitting layer; and a first resin layer on or above one surface of the light emitting layer, the light emitting layer containing a polyvinyl acetal and a light emitting material having a terephthalic acid ester structure, and having a magnesium element concentration of 80 ppm or less
Implementation Method 2
The light-emitting material such as a light-emitting powder, a luminescent pigment, a luminescent dye, or the like emits light when it is irradiated with light having specific wavelengths. When an interlayer film for laminated glass including such a light-emitting material is irradiated with light, light-emitting particles contained in the interlayer film emit light, thereby displaying high contrast images.
Data Source
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AI summary
The present invention aims to provide an interlayer film for laminated glass capable of displaying images with a high luminous intensity when irradiated with a light beam, and a laminated glass including the interlayer film for laminated glass. The present invention relates to an interlayer film for laminated glass, including a light-emitting layer that contains a thermoplastic resin and a lanthanoid complex with a polydentate ligand containing a halogen atom, the light-emitting layer containing not more than 50 ppm in total of potassium, sodium, and magnesium.