Multicompartment Water-Soluble Unit Dose for Residue Reduction
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Solution Overview
Problem
Current water-soluble unit dose laundry detergent articles often leave residues on fabrics, especially when washing larger loads or heavily soiled fabrics, due to inadequate detergent distribution and increased stress on the film, leading to undissolved film material and inefficiencies in low-water, low-temperature cycles.
Innovation Solution
A water-soluble multicompartment unit dose article with a high weight ratio of laundry detergent to total water-soluble film (at least 45:1), featuring multiple sealed compartments to distribute detergent evenly and reduce film stress, ensuring complete dissolution during washing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the amount of laundry detergent is increased to wash larger loads and heavily soiled fabrics, then the washing effectiveness is improved, but the amount of water-soluble film must also increase which leads to more residues on fabrics
Solution Approach 1:
The unit dose article is divided into multiple compartments, each containing a portion of the total laundry detergent. This segmentation allows the detergent to be distributed more evenly during the wash cycle, preventing the concentration issues that cause residues while still providing sufficient total detergent for large or heavily soiled loads.
2Quantity of substance
If the amount of water-soluble film is increased to contain more detergent for larger loads, then the detergent capacity is improved, but the film stress increases leading to undissolved film material
Solution Approach 1:
By dividing the total film into multiple separate compartments, each compartment experiences reduced mechanical stress during dissolution. The smaller compartment size allows more uniform and complete dissolution of each film section, preventing undissolved film material even when the total detergent capacity is increased for larger loads.
3Quantity of substance
If two unit dose articles are used to provide sufficient detergent for large loads, then the detergent quantity is improved, but residues on fabrics increase
Solution Approach 1:
Multiple compartments containing detergent are merged into a single unit dose article. This allows the combined detergent quantity of what would traditionally require two separate articles to be delivered in one package, while the internal compartmentalization ensures even distribution and complete dissolution, eliminating the residue problem associated with using multiple separate articles.
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 multicompartment design effectively reduces fabric residues by distributing detergent evenly and maintaining structural integrity, even under challenging wash conditions, thus enhancing washing efficiency and reducing re-washing needs.
Implementation Method 1
a first water-soluble film and a second water-soluble film, wherein the first and second water-soluble films are sealed together to create sealed film
Data Source
AI summary
A water-soluble multicompartment unit dose article having a weight ratio of laundry detergent to total water-soluble film in the water-soluble multicompartment unit dose article of at least 45:1.