Water-Soluble Detergent Pouch Sealing With Scraper and Vacuum
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Solution Overview
Problem
Dosing solid components into water-soluble detergent pouches often results in weak seals due to solid component entering the edge region, leading to product leakage and underfill issues, which conventional vacuum methods at high pressure exacerbate.
Innovation Solution
A process involving a scraper to remove excess solid component from the film-covered edge without contacting the film, followed by vacuum application to ensure proper sealing and prevent underfill, using a continuous process with a scraper and vacuum across multiple rows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a vacuum means is operated at significantly high pressure and air velocity to remove solid component from the surrounding edge region, then solid component removal from the edge region is improved, but solid component is removed from the cavity leading to under fill levels
Solution Approach 1:
The vacuum means is divided into multiple vacuum zones with different vacuum levels. A first vacuum zone applies low vacuum to remove solid component from the surrounding edge region, while a second vacuum zone applies higher vacuum to the cavity to ensure complete removal without compromising fill level. This segmentation allows different vacuum pressures to be applied to different regions simultaneously.
Solution Approach 2:
Different vacuum pressures are applied to different spatial locations. The surrounding edge region receives a specific vacuum pressure optimized for solid component removal, while the cavity receives a different vacuum pressure optimized for maintaining fill level. This local differentiation of vacuum quality resolves the contradiction between edge cleanup and cavity preservation.
2Quantity of substance
If solid component is dosed into the cavity and surrounding edge region, then the cavity is filled with detergent composition, but weak seals are formed due to solid component on the surrounding edge
Solution Approach 1:
The vacuum means operates before the sealing step to remove solid component from the surrounding edge region. By performing this cleanup action preliminarily, before sealing occurs, the solid component that would cause weak seals is removed in advance, ensuring strong reliable seals while maintaining the detergent composition in the cavity.
3Ease of manufacture
If the water-soluble film is deformed into the cavity and surrounding edge to form a film-covered surrounding edge, then sealing is enabled, but solid component enters the film-covered surrounding edge causing sealing issues
Solution Approach 1:
The harmful solid component is extracted from the film-covered surrounding edge region using the vacuum means before sealing occurs. This extraction removes the contaminant that would interfere with sealing, allowing the film to seal properly without solid component interference, thus maintaining both ease of manufacture and seal quality.
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 process achieves effective sealing of the water-soluble film, reducing leakage and underfill risks, ensuring consistent dosing and performance of the detergent pouches.
Implementation Method 1
applying a vacuum to the scraped film-covered surrounding edge to remove some of the solid component from the scraped film-covered surrounding edge
Data Source
AI summary
A process for making a water-soluble detergent pouch containing a solid component is provided, where the process employs a scraper and a vacuum. The process includes deforming a first water-soluble film into a cavity and over a surrounding edge to form an open recess and a film-covered surrounding edge, filling the open recess with a solid component, passing a scraper over the top of the filled recess to remove some of the solid component, applying a vacuum to remove some of the solid component, and positioning a second water-soluble film to close the filled recess by sealing the second water-soluble film to the first water-soluble film.