Flexible Package Gas Injection Portion for Self-Standing Stability
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Solution Overview
Problem
Conventional flexible packages face challenges in maintaining self-standing properties and ease of content discharge due to bending and deformation, especially when containing small amounts or when exposed to heat.
Innovation Solution
Incorporating a gas injection portion in the side edge of the package with a specific heat at constant volume of 0.67 kJ/kg·deg or higher, and a repelling force between 4 N to 30 N, combined with optimized film rigidity and gas barrier properties to prevent deformation and leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a flexible package uses conventional sealing without gas injection, then the structure is simple and manufacturing is easy, but the package loses self-standing property and bends easily when containing small amounts of content
Solution Approach 1:
The patent introduces a gas injection portion that injects gas into the package body to create internal pressure that maintains the package's self-standing shape. This pneumatic support system allows the flexible package to stand upright without rigid structures, resolving the contradiction between simplicity and self-standing stability.
Solution Approach 2:
The patent changes the physical state of the package interior by introducing gas at controlled pressure and volume. By adjusting gas injection parameters (pressure, volume, composition), the package achieves optimal self-standing properties while maintaining flexibility and simplicity in design.
2Reliability
If the package is made fully sealed to prevent leakage, then containment is improved, but the package becomes difficult to open and discharge contents
Solution Approach 1:
The patent divides the sealing structure into multiple sealed portions along the side edge portions, with at least one non-sealed portion that serves as an opening. This segmentation allows the package to maintain reliable sealing in most areas while providing easy access for content discharge at specific locations.
Solution Approach 2:
The patent extracts a specific portion of the sealing from the continuous sealed structure, creating a non-sealed portion that serves as an opening. This removal of sealing at strategic locations enables easy content discharge while the remaining sealed portions maintain leakage prevention reliability.
3Stability of the object's composition
If the package uses rigid container design to maintain shape, then structural stability is improved, but the package loses flexibility and increases in weight
Solution Approach 1:
The patent uses injected gas to provide internal structural support that replaces rigid container walls. The gas pressure maintains the package's shape and stability while keeping the package lightweight and flexible, eliminating the need for heavy rigid materials.
Solution Approach 2:
The patent employs flexible film structures that, when supported by internal gas pressure, achieve shape stability without requiring rigid construction. The flexible shell maintains structural integrity through pneumatic support, reducing weight while preserving flexibility.
4Force
If gas injection portion diameter is made large to improve repelling force, then self-standing property improves, but the package occupies more space and may leak
Solution Approach 1:
The patent optimizes the gas injection portion diameter within a specific range (3-50 mm) to achieve the desired repelling force while minimizing volume occupation. By carefully controlling this parameter along with gas pressure and composition, the package achieves optimal balance between force generation and space efficiency.
Solution Approach 2:
The patent may use composite gas compositions or combined structural elements in the gas injection portion to enhance repelling force efficiency. This allows achieving higher forces within smaller volume constraints through optimized material properties and configuration.
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 enhances the self-standing property and ease of content discharge by minimizing bending and maintaining shape integrity, even when heated, while reducing the risk of gas leakage.
Implementation Method 1
The non-sealed portion has a gas injection portion containing a gas which has a specific heat at constant volume of 0.67 kJ/kg·deg or higher at 0° C. and 1 atm. The gas injection portion has a diameter in a range of from 3 mm to 50 mm and is formed such that a repelling force is in a range of from 4 N to 30 N at 23° C. and 1 atm when an entire gas injection portion is nipped from both sides of the first and second side-surface films
Data Source
AI summary
A flexible package including a package body including a first side-surface film and a second side-surface film sealed in a peripheral portion. The package body has sealed portions formed in side edge portions such that a non-sealed portion is formed in at least one of the sealed portions. The non-sealed portion has a gas injection portion containing a gas which has a specific heat at constant volume of 0.67 kJ/kg·deg or higher at 0° C. and 1 atm. The gas injection portion has a diameter of from 3 to 50 mm and is formed such that a repelling force is from 4 to 30 N at 23° C. and 1 atm when an entire gas injection portion is nipped from both sides of the first and second side-surface films and squeezed until a nipped gas injection portion has a width equal to a half of the diameter of the gas injection portion.