Solid Laundry Detergent Unit Dose pH Optimization
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Solution Overview
Problem
Water-soluble unit dose articles with solid laundry detergent compositions face limitations in cleaning performance due to space constraints, leading to under-performance, which cannot be effectively enhanced by adding more detergent without compromising convenience and structural stability.
Innovation Solution
A water-soluble unit dose article comprising a solid laundry detergent composition with specific formulations, including a whitening agent, enzyme, stain removal active, cationically modified polysaccharide, and perfume, optimized to achieve improved fabric whiteness and cleaning performance at a pH range of 6.5 to 8.8 upon dilution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If more solid laundry detergent composition is added to the water-soluble unit dose article to improve cleaning performance, then the cleaning performance is improved, but the unit dose article becomes bigger making it less convenient and could impair dissolution and reduce structural stability
Solution Approach 1:
The patent changes the pH parameter of the solid laundry detergent composition to a specific range (pH 7.0-9.0) to optimize cleaning performance. This parameter optimization allows achieving better cleaning results without increasing the amount of detergent composition, thereby maintaining the compact size and convenience of the unit dose article while improving productivity.
2Productivity
If more solid laundry detergent composition is added to improve cleaning performance, then the cleaning performance is improved, but the structural stability of the unit dose article is reduced due to impaired dissolution
Solution Approach 1:
The patent optimizes the pH parameter of the detergent composition to fall within the range of 7.0-9.0, which enhances cleaning effectiveness. This parameter change allows achieving superior cleaning performance without compromising the structural stability or dissolution characteristics of the water-soluble unit dose article, thus resolving the contradiction between productivity and reliability.
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 optimized formulation enhances fabric whiteness and cleaning performance by maintaining structural stability and convenience while improving the efficacy of the detergent, even at lower concentrations, by carefully balancing the composition and pH for effective release and action.
Implementation Method 1
Upon exposure to water, the water-soluble film dissolves/disintegrates releasing the laundry detergent composition into the surrounding water
Implementation Method 2
The laundry detergent composition may be a solid laundry detergent composition. Such detergent compositions comprise known laundry detergent cleaning actives
Implementation Method 3
One preferred active ingredient is an optical brightener
Data Source
AI summary
Water-soluble unit dose article containing solid laundry detergent composition and water-soluble film.