Pouch Inner Film Position Confirmation via Overlapped Sealing
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Solution Overview
Problem
The existing pouch designs with inner films struggle to confirm the position of film through portions from the outside, leading to potential displacement issues during manufacturing, which affects the proper filling and handling of content fluids, especially causing body expansion due to fluid weight.
Innovation Solution
A pouch design with gusset portions and an inner film featuring film through portions that are overlapped on the body film in the bag-making sealing portion, allowing for external confirmation of the film through portion position and enabling gas discharge during filling, thus preventing body expansion and ensuring accurate filling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If film through portions are formed on the inner film to enable content fluid flow, then the fluid flow is improved, but the position of film through portions cannot be confirmed from the outside leading to potential displacement
Solution Approach 1:
A position confirmation mark is introduced as an intermediary element that does not directly participate in fluid flow but serves as a reference indicator visible from the outside. This mark is formed together with the film through portion during the punching process, allowing external confirmation of the film through portion's position without interfering with the fluid flow function.
Solution Approach 2:
The position confirmation mark is designed to be visually distinct from the inner film, creating a contrast that enables easy detection. The mark may differ in color, reflectivity, or visual appearance from the surrounding film material, allowing operators to quickly verify the position of film through portions from the outside without disassembling or inspecting internal structures.
2Stability of the object's composition
If inner film is disposed in pouch body to prevent body expansion, then the pouch shape stability is improved, but the formation position of film through portion may be displaced and hard to confirm
Solution Approach 1:
The position confirmation mark serves as an intermediary reference that links the internal film through portion position to external observation. This mark is formed simultaneously with the film through portion during the punching process, creating a reliable reference system that allows verification of manufacturing precision without compromising the pouch shape stability provided by the inner film.
Solution Approach 2:
The position confirmation mark provides immediate visual feedback about the film through portion's position during and after the manufacturing process. This feedback mechanism allows operators to detect any displacement or misalignment of the film through portion, enabling quality control and ensuring manufacturing precision while maintaining the pouch's shape stability.
3Ease of operation
If outer case requires strength to handle back-in-box pouch, then the pouch handling is improved, but the installation space and case complexity increase
Solution Approach 1:
The inner film is extracted as a separate functional element that specifically addresses the body expansion problem. By introducing this internal component, the outer case's burden is reduced, allowing for lighter and more compact packaging solutions while maintaining pouch shape stability and handling ease.
Solution Approach 2:
The pouch structure is segmented into multiple functional components: the outer case for protection and handling, the inner film for shape stability and expansion prevention, and the film through portions for fluid flow. This segmentation allows each component to be optimized independently, reducing the overall installation space and case complexity while maintaining ease of operation.
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 effectively prevents body expansion by confirming the inner film through portion position and facilitating gas discharge, reducing the need for strong outer cases and ensuring efficient filling without foaming, even with fluid detergents.
Implementation Method 1
a pouch body formed like a bag by heat-sealing a plurality of body films to form a bag-making sealing portion
Data Source
AI summary
To provide a pouch that allows a displacement of the formation position of a film through portion to be detected. A pouch includes an inner film (70) disposed in a pouch body (20), the inner film (70) including a first fixing portion (71) fixed to a pouch body (20), a second fixing portion (72) fixed to the pouch body (20), an inner placement portion (75) that is disposed in the pouch body (20) without being fixed to the pouch body (20), and a plurality of film through portions (76) penetrating in a film thickness direction, the plurality of film through portions (76) including a first film-through portion (76a) at least partially formed on the first fixing portion (71) and an inner film-through portion (76c) formed on the inner placement portion (75), the first film-through portion (76a) being overlapped on the body film in a bag-making sealing portion (23).