Wet Sheet Packaging With Inverted Inner Bag to Prevent Liquid Leakage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wet sheet packaging designs face challenges in preventing liquid leakage during manufacturing and maintaining cost-effectiveness, as the dispensing opening can leak liquid and the adhesive flap may deteriorate, leading to gaps and increased costs.
Innovation Solution
A packaging container with an inner bag housed in a case where the bottom part is directed upward and the opening part downward, preventing liquid from reaching the dispensing opening, combined with a lateral gusset bag and protrusion pieces to facilitate easy removal and prevent adherence, ensuring shape retention and cost reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple packaging container with a dispensing opening is used to reduce costs, then manufacturing cost is reduced, but liquid leakage occurs from the dispensing opening during manufacture
Solution Approach 1:
The packaging is divided into an outer container and an inner bag. The inner bag is a separate component that can be inserted into the outer container, allowing the dispensing opening to be sealed independently from the main container structure. This segmentation enables cost-effective manufacturing while preventing liquid leakage.
Solution Approach 2:
The inner bag acts as an intermediary element between the liquid-containing wet sheets and the external environment. It provides a barrier function that prevents liquid from reaching the dispensing opening, while still allowing the simple outer container structure to be used for cost reduction.
2Ease of operation
If the dispensing opening is left open for easy access, then ease of operation is improved, but adhesive power of the flap deteriorates due to liquid exposure
Solution Approach 1:
The sealing function is separated from the dispensing opening structure. The inner bag provides the sealing barrier, while the flap on the outer container provides the dispensing access. This segmentation allows the flap to remain functional without direct exposure to liquid, preserving adhesive power while maintaining ease of operation.
Solution Approach 2:
The inner bag serves as a mediator that protects the flap and adhesive from liquid exposure. It allows the dispensing opening to remain accessible while preventing liquid from reaching the adhesive area, thus maintaining both ease of operation and adhesive reliability.
3Ease of manufacture
If the opening part of the inner bag is directed upward during manufacture, then ease of manufacture is improved, but liquid can reach the dispensing opening causing leakage
Solution Approach 1:
The inner bag is intentionally inserted in an inverted orientation with the opening part facing downward into the outer container. This inversion ensures that during subsequent handling and storage, the opening remains at the bottom away from the dispensing opening at the top, preventing liquid leakage while maintaining manufacturing simplicity.
Solution Approach 2:
The inner bag is pre-oriented in the correct position (opening downward) during the manufacturing process. This preliminary action ensures that liquid cannot reach the dispensing opening during storage and transport, preventing leakage issues before they can occur during use.
Data Source
AI summary
The wet sheet packaging body includes a plurality of wet sheets (1), a packaging container configured to house the wet sheets. The packaging container includes a top surface and a dispensing opening, on the top surface, configured to take out each of the wet sheets, an opening and closing lid (5) configured to open and close the dispensing opening (33) of the packaging container, and the wet sheets housed in a layered state in the packaging container. The inner bag (2) includes an opening part (24) and a bottom part (21). The wet sheets are housed in the inner bag. The inner bag is housed in the packaging container while the opening part is directed downward and the bottom part is directed upward. The inner bag is pulled out from the dispensing opening of the packaging container for removal when use of the wet sheet packaging body is started.