Lightweight Pharmaceutical Bag Films With Gas Barrier Layers
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Solution Overview
Problem
Existing pharmaceutical containers, particularly IV bags, require significant amounts of plastic material to maintain sterility and barrier properties, leading to environmental impact and potential failure due to increased gas permeability, which affects product shelf life and safety.
Innovation Solution
A single-layer film with a grammage of 270 g/m² or less, incorporating a multilayer structure with a barrier layer and support layer, provides both mechanical and barrier properties, reducing material usage by at least 50% while maintaining low air and water permeability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If the film thickness is reduced to decrease weight and material usage, then sustainability and material consumption are improved, but gas barrier performance deteriorates leading to increased water vapor and air permeability
Solution Approach 1:
The patent applies composite materials by combining multiple polymer layers with distinct functions: a polyolefin layer providing mechanical strength and a polyamide layer providing gas barrier properties. This composite structure enables the film to achieve both reduced thickness and maintained barrier performance, resolving the contradiction between material reduction and reliability.
Solution Approach 2:
The patent changes the parameters of the film structure by specifying a grammage range (15-270 g/m²) and controlling the thickness and composition of each layer. By optimizing these parameters, particularly the ratio and thickness of polyolefin and polyamide layers, the film achieves sufficient barrier performance with minimal material usage.
2Loss of substance
If the film thickness is reduced to decrease weight and material usage, then sustainability is improved, but the shelf life of the pharmaceutical product deteriorates due to increased permeability
Solution Approach 1:
The composite structure with polyamide layer provides enhanced gas barrier properties that maintain product stability throughout the required shelf life, while the overall reduced grammage minimizes material consumption. The synergistic combination of layers ensures both sustainability and product preservation.
Solution Approach 2:
By controlling the grammage within 15-270 g/m² and optimizing the layer composition, the film maintains appropriate permeability characteristics throughout the product's shelf life, preventing both excessive material use and premature product degradation.
3Loss of substance
If the film thickness is reduced to decrease material usage, then environmental impact is reduced, but the mechanical strength and impact properties deteriorate
Solution Approach 1:
The composite structure assigns specific functions to each layer: the polyolefin layer provides mechanical strength, flexibility, and impact resistance, while the polyamide layer provides gas barrier properties. This functional division allows the film to be thin yet mechanically robust.
Solution Approach 2:
The patent optimizes the parameters by controlling the thickness and grammage of each layer within specific ranges, ensuring that the polyolefin layer provides sufficient mechanical strength while the overall structure remains lightweight with minimized material consumption.
4Device complexity
If a single-layer film is used to simplify the structure and reduce material usage, then device complexity and material consumption are improved, but the barrier performance against water and air permeability deteriorates
Solution Approach 1:
The patent uses a composite film structure with two integrated layers instead of separate single-layer films or overwraps. This composite approach maintains barrier performance while simplifying the overall packaging structure by eliminating the need for secondary overwrap packaging.
Solution Approach 2:
The patent merges the functions of multiple films into a single composite film structure, combining the barrier properties and mechanical properties in one integrated layer system. This reduces the number of separate components and simplifies the packaging structure while maintaining necessary performance.
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 solution reduces plastic material usage, enhances sustainability, and ensures product integrity by minimizing gas permeation, thus extending shelf life and ensuring safety without the need for secondary packaging.
Implementation Method 1
the film has a grammage of equal to or less than 270 g/m2... maintaining a sufficiently high barrier to air permeation... minimize gas permeation
Data Source
Figure 1~2
Figure 3~4
AI summary
A bag for pharmaceutical application, comprising a bag body enclosing a bag cavity, the bag body comprising at least one opening fluidly connecting the bag cavity with the environment, wherein the bag body comprises a body wall, wherein the body wall comprises a film, characterized in that the film has a grammage of equal to or less than 270 g/m2 measured according to ISO 536:2019, and the film has an air transmission rate measured according to ISO 15105-1:2007 Annex A (Differential-pressure method, using a pressure sensor) at standard conditions, which results in a volume increase of air per year, which is not higher than 3% of the total volume of the bag cavity.