Water-Soluble Unit Dose Suds Generation via Surfactant Optimization
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Solution Overview
Problem
Water-soluble unit dose articles exhibit poor suds generation compared to powder compositions, which affects consumer perception of their cleaning ability.
Innovation Solution
A water-soluble unit dose article comprising a fibrous non-woven sheet forming a sealed compartment with a granular laundry detergent composition, where the detergent includes a surfactant system of linear alkylbenzene sulphonate and alkyl alkoxylated alcohol, enhancing suds generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If water-soluble unit dose article uses conventional detergent formulation, then convenience and ease of use are improved, but suds generation deteriorates
Solution Approach 1:
The patent applies parameter changes by modifying the surfactant system composition parameters - specifically using linear alkylbenzene sulphonate combined with alkyl alkoxylated alcohol (average degree of alkoxylation 1-10) in a weight ratio of 3:1 to 300:1. This parameter optimization resolves the contradiction by achieving both water solubility (maintaining convenience) and improved suds generation (increasing from poor to good performance comparable to powder compositions).
Solution Approach 2:
The patent employs composite materials by creating a surfactant system that combines linear alkylbenzene sulphonate (anionic surfactant) with alkyl alkoxylated alcohol (non-ionic surfactant). This composite surfactant system leverages the synergistic effects of both surfactant types to achieve superior suds generation while maintaining the water-soluble characteristics necessary for unit dose article functionality.
2Quantity of substance
If water-soluble unit dose article uses powder composition formulation, then suds generation is improved, but convenience and ease of use deteriorates
Solution Approach 1:
The patent resolves this contradiction by changing the physical state parameter of the detergent from powder to water-soluble granular form, while simultaneously optimizing the chemical composition parameters (surfactant system with linear alkylbenzene sulphonate and alkyl alkoxylated alcohol). This allows the product to maintain powder-like suds generation performance while achieving the convenience of water-soluble unit dose articles.
3Ease of operation
If water-soluble sheet dissolves completely, then ease of use is improved, but suds generation deteriorates
Solution Approach 1:
The patent resolves this contradiction by changing the detergent composition parameters - specifically formulating a granular laundry detergent with a optimized surfactant system (linear alkylbenzene sulphonate combined with alkyl alkoxylated alcohol in 3:1 to 300:1 weight ratio). This composition change enables complete dissolution (maintaining ease of use) while achieving good suds generation (resolving the performance issue).
Solution Approach 2:
The patent uses composite materials by combining different surfactant types (anionic linear alkylbenzene sulphonate and non-ionic alkyl alkoxylated alcohol) in a synergistic formulation. This composite approach ensures that the detergent fully dissolves in water (maintaining ease of use) while the surfactant combination produces adequate suds generation.
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 solution effectively improves suds generation in water-soluble unit dose articles, matching the performance of traditional powder compositions and addressing consumer concerns about cleaning efficacy.
Implementation Method 1
the water-soluble sheet dissolves and/or disintegrates and releases the detergent composition into the water
Implementation Method 2
the granular laundry detergent comprises from 1wt% to 50wt% of a surfactant system, wherein the surfactant system comprises linear alkylbenzene sulphonate and alkyl alkoxylated alcohol
Data Source
Figure 1~2
AI summary
A water-soluble unit dose article comprising a fibrous non-woven sheet and a surfactant system.