Glass Container Coating for Blue Light Filtering Without Color Shift
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Solution Overview
Problem
Existing glass containers fail to effectively filter out harmful blue light that causes lightstruck flavor in beverages while maintaining a clear and luminous appearance, leading to unsatisfactory presentation and market acceptance.
Innovation Solution
A light filtering coating is applied to glass containers using a polymerizable composition comprising semi-conductive nanoparticles, which absorbs light in the range of 350 nm to 480 nm, particularly around 420-480 nm, while maintaining high luminous transmission and minimal color change.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If coloured glass containers (green or brown) are used to filter blue light, then light filtering efficiency is improved, but luminous transmission and visual appeal deteriorate
Solution Approach 1:
The patent segments the light filtering function from the glass container material itself by applying a separate coating layer containing organic dyes or pigments. This coating selectively absorbs blue light wavelengths (420-480 nm) while allowing other wavelengths to pass through, achieving efficient light filtering without coloring the entire glass container. The segmentation allows the glass to remain clear and luminous while the coating provides the protective filtering function.
Solution Approach 2:
The patent creates a composite structure by combining clear glass with a light-filtering coating layer containing organic dyes or pigments dispersed in a binder matrix. This composite material approach allows the clear glass substrate to maintain high luminous transmission while the coating layer provides selective blue light absorption. The composite structure resolves the contradiction by assigning different functions to different material components.
2Reliability
If broad band light filters are used to block blue light, then lightstruck flavour prevention is improved, but colour accuracy and presentation deteriorate
Solution Approach 1:
The patent applies local quality by using organic dyes or pigments with specific absorption characteristics tailored to target only the harmful blue light wavelengths (420-480 nm) that cause lightstruck flavour. The coating is formulated to have high absorption in this specific wavelength range while maintaining high transmission in other wavelengths, particularly in the green and red regions that contribute to colour perception and presentation. This selective local quality approach prevents lightstruck flavour while preserving colour accuracy.
Solution Approach 2:
The patent utilizes parameter changes by carefully selecting and formulating organic dyes or pigments with specific absorption spectra that peak in the blue light region (420-480 nm). By adjusting the chemical structure and concentration of these organic compounds, the coating can be tuned to provide maximum protection against lightstruck flavour while minimizing impact on the overall colour transmission. This parameter optimization resolves the contradiction between protection and presentation.
3Illumination intensity
If white glass containers are used to maintain clarity and luminosity, then visual appeal is improved, but light filtering efficiency deteriorates
Solution Approach 1:
The patent introduces an intermediary light-filtering coating layer between the clear glass container and the beverage content. This intermediary coating, containing organic dyes or pigments, selectively absorbs harmful blue light wavelengths before they can reach and interact with the beverage. The clear white glass container maintains its clarity and luminosity for visual appeal, while the intermediary coating provides the necessary blue light filtering protection, resolving the contradiction between aesthetics and protection.
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 coating effectively filters out harmful blue light, reducing the risk of lightstruck flavor while preserving the glass container's clarity and luminosity, making it suitable for high-end markets.
Implementation Method 1
the absorbance through a 5-micrometer thick light filtering coating is greater than 0.5 for each light wavelength ranging from 350 nm to λcut, λcut being in the range from 420 nm to 480 nm
Implementation Method 2
a light filtering coating obtained by curing a polymerizable composition comprising semi-conductive nanoparticles
Data Source
AI summary
A light filtering glass container including a glass container coated with a light filtering coating obtained by curing a polymerizable composition including semi-conductive nanoparticles. The absorbance through a 5-micrometer thick light filtering coating is greater than 0.5 for each light wavelength ranging from 350 nm to λcut, λcut being in the range from 420 nm to 480 nm, and the difference of lightness between the uncoated glass container and the glass container with the light filtering coating is lower than 5.