Infusion Bag Barrier Film Bonding to Protect Inorganic Layers
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Solution Overview
Problem
Existing infusion bags face challenges in maintaining gas barrier properties, particularly when accommodating contents that are sensitive to water or oxygen, as the bonding of barrier films to the infusion bag surface can lead to cracking, breakage, or peeling of the inorganic layer, compromising the gas barrier performance.
Innovation Solution
A method of manufacturing an infusion bag where one surface is covered with a metal barrier film including a metal layer and the other surface is covered with a lamination type barrier film having a laminated structure of an organic layer and an inorganic layer, ensuring that the barrier films are bonded in a planar manner to prevent damage and ensure appropriate bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a barrier film with inorganic layer is bonded to the infusion bag surface, then gas barrier properties are improved, but the inorganic layer may crack, break, or peel during bonding
Solution Approach 1:
The infusion bag is pressed into a planar shape before bonding the barrier film. This preliminary planarization prevents wrinkles and surface irregularities that would cause cracking, breaking, or peeling of the inorganic layer during the bonding process, while still allowing the barrier film to provide effective gas barrier protection.
2Manufacturing precision
If the infusion bag is pressed planar for bonding, then bonding quality improves, but the three-dimensional shape required for content accommodation is lost
Solution Approach 1:
The infusion bag transitions between two states: a planar state during barrier film bonding to ensure high bonding quality, and a three-dimensional expanded state during content accommodation and use. The bag can be pressed planar when empty for bonding, then expanded with content to provide the required storage volume and shape.
3Reliability
If barrier film is bonded to both surfaces, then protection against water and oxygen is improved, but the complexity of the manufacturing process increases
Solution Approach 1:
The infusion bag is pressed into a planar shape before bonding the barrier film to each surface. This preliminary planarization simplifies the bonding process by eliminating wrinkles and surface irregularities, ensuring uniform contact and reliable bonding without requiring complex bonding equipment or multiple adjustment steps.
Data Source
AI summary
An object is to provide a method of manufacturing an infusion bag where one surface is covered with a metal barrier film and the other surface is covered with an organic/inorganic lamination type barrier film, in which damage of an inorganic layer can be prevented, and a barrier film can be appropriately bonded to the infusion bag body. Accommodation parts for accommodating the content of an infusion bag body that is sealed with a strong sealed portion and includes the accommodation parts separated by a weak sealed portion are placed on a first placement table and are covered with a metal barrier film having a concave portion to bond peripheral portions. Next, the strong sealed portion and the weak sealed portion are placed on a second placement table having a space for accommodating the concave portion and are covered with a lamination type barrier film to bond peripheral portions. As a result, the object is achieved.