Liquid Storage Bag Light Shielding via Interlayer Colorant
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Solution Overview
Problem
Existing liquid storage bags for ink and other liquids often use costly materials like aluminum for light shielding, which increases production costs.
Innovation Solution
A liquid storage bag formed from a film with a first base layer, a second base layer, and a black layer located between the two base layers, where the black layer is formed of a colorant filling the layer surface of the second base layer, providing effective light shielding at a lower cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If aluminum is used for light shielding in the film, then light-shielding properties are improved, but material cost increases
Solution Approach 1:
The patent replaces expensive aluminum with a cheaper organic colorant that provides sufficient light shielding for the intended application lifecycle of the ink bag
Solution Approach 2:
The patent changes the material parameter from metallic aluminum to organic colorant, achieving comparable light-shielding performance through chemical composition modification rather than material substitution with equivalent performance characteristics
2Object-affected harmful factors
If polyethylene containing carbon black is used for light shielding, then light-shielding properties are improved, but material cost increases due to kneading process
Solution Approach 1:
The patent uses a cost-effective organic colorant system that eliminates the need for expensive carbon black kneading processes while providing adequate light shielding for the bag's service life
Solution Approach 2:
The patent modifies the material composition by using organic colorants applied as coatings or layers, changing the manufacturing approach from high-energy kneading processes to more economical application methods
3Object-affected harmful factors
If a multi-layer film structure with black layer is used, then light-shielding properties are improved, but film complexity increases
Solution Approach 1:
The patent divides the film into multiple functional layers (base layer, adhesive layer, black layer) where each layer performs a specific function, achieving superior light shielding without excessive complexity by assigning dedicated roles to each layer
Solution Approach 2:
The patent creates a composite film structure combining different materials (polyethylene or polypropylene base layer, adhesive layer, and organic colorant black layer) to achieve properties that single materials cannot provide alone
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 use of a film with multiple black layers and specific base layers, such as polyethylene and polyethylene terephthalate with alumina, enhances light-shielding properties while reducing material costs and improving the bag's durability and resistance to punctures.
Implementation Method 1
The black layer is formed of a colorant filling a layer surface of the second base layer
Data Source
AI summary
A liquid storage bag includes a bag configured to store a liquid and a feeder that feeds the liquid in the bag to an external component. The bag is formed of a film. The film includes a first base layer, a second base layer, and a first black layer located between the first base layer and the second base layer. The first black layer is formed of a black colorant filling a layer surface of the second base layer.