Polarizing Film Packaging Composite for Broad-Spectrum Light Blocking
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Solution Overview
Problem
Existing packaging materials lack a broad-spectrum light-blocking effect, which is necessary to prevent photooxidative degradation of light-sensitive products and extend their shelf life.
Innovation Solution
A packaging composite material comprising multiple layers of polarizing films with controlled polarization directions, preferably at an included angle of 45° to 100°, and optionally with surface and bonding layers, to achieve a broad-spectrum light-blocking effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If inorganic additives (such as TiO2) or organic light-blocking additives are added to packaging materials to achieve light-blocking properties, then light-blocking capability is improved, but the light-blocking range remains narrow and application scope is limited
Solution Approach 1:
The patent uses a composite structure consisting of multiple polarizing films with different polarization directions combined in a single packaging material. This composite approach enables broad-spectrum light blocking across UV, visible, and infrared ranges, overcoming the limitation of narrow light-blocking range associated with single additives.
Solution Approach 2:
The patent changes the parameter of polarization direction by incorporating multiple polarizing films with different orientations (e.g., 0°, 45°, 90°). This parameter variation allows the material to block light across different wavelengths and angles, expanding the light-blocking range from narrow to broad spectrum.
2Object-affected harmful factors
If metallizing the surface of polymer materials is performed to achieve light-blocking properties, then light-blocking effect is improved, but structural complexity and manufacturing complexity increase
Solution Approach 1:
The patent employs thin polarizing films instead of metal coatings to achieve light-blocking properties. These flexible thin films provide the required optical functionality without the structural complexity and manufacturing challenges associated with metallization processes, while maintaining broad-spectrum light blocking capability.
3Object-affected harmful factors
If metallizing the surface of polymer materials is performed to achieve light-blocking properties, then light-blocking effect is improved, but manufacturing complexity increases
Solution Approach 1:
The patent creates a composite material structure using multiple polarizing films that can be manufactured through conventional lamination and extrusion processes. This approach simplifies manufacturing compared to metallization, as it avoids complex coating, drying, and bonding operations while achieving superior broad-spectrum light blocking.
4Adaptability or versatility
If polarizing films with controlled polarization directions are used to achieve broad-spectrum light-blocking effect, then light-blocking range is improved, but the structure becomes more complex
Solution Approach 1:
The patent uses multiple thin polarizing films with different polarization directions arranged in a layered structure. This configuration achieves broad-spectrum light blocking by exploiting the optical properties of each film layer, providing enhanced versatility without significant structural complexity as each layer is thin and flexible.
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 packaging composite material effectively blocks a wide range of light, including ultraviolet and visible light, thereby extending the shelf life of light-sensitive products.
Implementation Method 1
polarizing films, wherein the packaging composite material comprises: a polarizing layer, comprising two or more layers of polarizing film; wherein polarization directions of at least two layers of polarizing film have an included angle which is 45°
Data Source
Figure 1~2
AI summary
Disclosed in the present invention is a packaging composite material comprising polarizing films, the packaging composite material comprising: a polarizing layer, comprising two or more layers of polarizing film, wherein polarization directions of at least two layers of polarizing film have an included angle which is not 0°. The packaging composite material of the present invention has a simple structure, strong light-blocking properties, a high light-blocking rate, and a broad-spectrum light-blocking effect. Also disclosed in the present invention are the use of the packaging composite material in packaging, and the use of the packaging composite material in a label. When used as packaging or a label, the packaging composite material can extend the shelf life of products which need to be stored in the dark.