Wavelength-Selective Packaging Film for Photosensitive Containers
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Solution Overview
Problem
Current packaging methods for photosensitive compositions, such as black bags, require label verification by removing the packaging, which is inefficient and can lead to exposure or leakage, and may not accurately identify the correct label information.
Innovation Solution
A packaging material with a film that has low transmittance in the UV range (200 nm to 500 nm) and high transmittance in the visible range (620 nm to 940 nm), typically made from transparent resin with added yellow dyes and ultraviolet absorbers, allowing for label reading through the packaging without removal, including bar-code scanning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a black bag is used to package the container, then the photosensitive composition is protected from light exposure and deterioration, but the label information cannot be read without removing the packaging
Solution Approach 1:
The packaging film is designed with different light transmission properties for different wavelength ranges: it blocks UV light (200-500 nm) to protect the photosensitive composition while transmitting visible light (620-940 nm) to allow label reading. This local differentiation of optical properties resolves the contradiction between protection and accessibility.
Solution Approach 2:
The yellow-tinted transparent film acts as an intermediary that selectively filters light. It serves as a mediator between the need for UV protection and the need for label visibility, allowing both functions to coexist without requiring package removal.
2Reliability
If a black bag is used to package the container, then the photosensitive composition is protected from light exposure, but the work for checking label correctness becomes more complex
Solution Approach 1:
The film provides localized optical filtering - blocking harmful UV wavelengths while allowing beneficial visible wavelengths to pass through. This resolves the complexity by enabling direct label verification through the packaging without requiring additional verification steps.
3Ease of operation
If the packaging material is made transparent, then the label can be read without removal, but the photosensitive composition is exposed to light and may deteriorate
Solution Approach 1:
The film's optical parameters are specifically tuned to change based on wavelength. It has low transmittance (5% or less) in the UV range (200-500 nm) to protect the composition and high transmittance (10% or more) in the visible range (620-940 nm) to enable label reading. This parameter differentiation resolves the contradiction.
Solution Approach 2:
The packaging film is a composite material combining transparent resin with yellow dyes and ultraviolet absorbers. This composite structure provides both visibility (through transparency) and protection (through UV absorption and yellow tint), resolving the contradiction between these two requirements.
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
Enables efficient management and storage of photosensitive compositions by allowing label information to be read visually or via barcode without unpacking, reducing exposure and leakage risks while maintaining the composition's integrity.
Implementation Method 1
a film having a transmittance of a light in a wavelength range of 200 nm to 500 nm of 5% or less
Implementation Method 2
a transmittance of a light in a wavelength range of 620 nm to 940 nm of 10% or more
Implementation Method 3
the film is a film comprising a transparent resin and a yellow dye; the film further comprises an ultraviolet absorber
Data Source
AI summary
A packaging material for packaging a container having a photosensitive composition filled therein, which comprises a film having a transmittance of a light in a wavelength range of 200 nm to 500 nm of 5% or less and a transmittance of a light in a wavelength range of 620 nm to 940 nm of 10% or more.