Transparent UV-Filtering Film for Lightweight Glass Packaging
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Solution Overview
Problem
Existing UV stabilizers for food products, cosmetic formulations, and fragrances are inadequate in filtering UV light in the 300-340 nm range, leading to degradation of aldehydes and affecting flavor and odor, while current glass containers are insufficient due to reduced thickness, necessitating a transparent and efficient UV filtering solution.
Innovation Solution
A filtering film comprising semi-conductive nanoparticles and/or organic UV-absorbing compounds, designed with a weighted mean absorbance to effectively filter UV light in the 300-380 nm range, maintaining transparency and preventing aldehyde degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If glass container thickness is reduced to decrease weight, then weight is reduced, but UV light filtration capability deteriorates
Solution Approach 1:
A filtering film is introduced as an intermediary layer between the UV light source and the glass container. This film selectively absorbs UV radiation in the 300-380 nm range while allowing visible light to pass through, providing UV protection without requiring increased glass thickness or weight.
Solution Approach 2:
The filtering film is constructed from composite materials containing UV-absorbing compounds (such as benzotriazoles, triazines, or other organic UV filters) embedded in a transparent polymer matrix. This composite structure achieves effective UV filtration while maintaining optical transparency and flexibility.
2Object-affected harmful factors
If UV stabilizers are added to cosmetic products, then UV protection is improved, but harmful degradation products are generated
Solution Approach 1:
Instead of using conventional UV stabilizers that can degrade and create harmful byproducts, the invention employs filtering films with UV-absorbing compounds that dissipate UV energy as heat through safe pathways. This converts the harmful UV radiation into benign thermal energy without generating harmful degradation products.
Solution Approach 2:
The filtering film acts as a sacrificial protective layer that can be easily replaced if needed, containing the UV-absorbing compounds in a stable, non-degrading form. This approach avoids the long-term stability issues and harmful byproduct formation associated with conventional UV stabilizers.
3Object-affected harmful factors
If filtering film absorbs UV light in 300-340 nm range, then UV protection is improved, but visible light transmission may be affected
Solution Approach 1:
The filtering film exhibits local quality differentiation in its optical properties: it strongly absorbs UV radiation in the 300-380 nm range while being transparent to visible light wavelengths (400-780 nm). This selective absorption profile is achieved through the specific molecular structure of the UV-absorbing compounds used in the film.
Solution Approach 2:
The filtering film is designed to be colorless or nearly colorless in the visible range, ensuring that it does not alter the appearance of contents viewed through the container. The UV absorption occurs at wavelengths that do not interfere with visible light transmission, maintaining product visibility and aesthetic appeal.
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 filtering film achieves high UV light absorption in the 300-340 nm range, effectively protecting contents from UV-induced degradation while maintaining transparency and color neutrality, suitable for glass containers.
Implementation Method 1
compounds absorbing UV-light in a range from 300 nm to 380 nm
Implementation Method 2
They can absorb a UV photon to promote an electron from n state of the oxygen of carbonyl bound into a non-bounding π* state of the carbonyl bound
Data Source
AI summary
A filtering film including compounds absorbing UV-light in a range from 300 nm to 380 nm and a binder, wherein the weighted mean absorbance A380 is greater than 2, and packaging having a substrate that is partially or totally covered with the filtering film or formed from the filtering film. Also, methods of protection of consumer goods against UV-light, in which the consumer goods are enclosed by the filtering film.