Granular laundry detergent
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Solution Overview
Problem
High density, high active agglomerated detergent granules suffer from slow dissolution in water, making them unsuitable for suboptimal washing conditions like hand-washing, and current methods to increase suds volume are costly and water-intensive.
Innovation Solution
A granular detergent composition containing structured particles with 35-80% anionic surfactant and 8-50% hydrophilic silica, which upon hydration, form swollen silica particles that enhance dissolution and suds volume by creating soft hydrogel microparticles that stabilize and boost suds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If high density, high active agglomerated detergent granules are used, then mass and volume compaction is improved, but dissolution speed deteriorates
Solution Approach 1:
The detergent granule is segmented into a dual-phase structure with hydrophilic silica particles dispersed throughout the surfactant matrix. This segmentation creates multiple dissolution pathways and interfaces, allowing water to penetrate and dissolve the granule more rapidly while maintaining the compacted high-density structure.
Solution Approach 2:
Hydrophilic silica particles with controlled porosity are incorporated into the detergent granule structure. These porous particles create channels and voids that facilitate water penetration and accelerate dissolution, while the silica itself contributes to the compacted density of the granule.
2Quantity of substance
If more surfactant is added to generate copious suds, then suds volume is improved, but harshness to hands and water usage deteriorates
Solution Approach 1:
Hydrophilic silica particles act as an intermediary substance that mediates between the surfactant and water. The silica particles enhance suds formation and stability through their own surfactant-like properties, allowing adequate suds volume to be achieved with lower surfactant concentrations, thereby reducing harshness to hands.
Solution Approach 2:
The detergent composition is formulated as a composite material combining surfactants with hydrophilic silica particles. This composite structure creates synergistic effects where the silica particles contribute to suds formation and stability, enabling effective cleaning and suds generation without requiring excessive surfactant amounts that would be harsh on hands.
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 composition achieves faster dissolution and enhanced suds volume, improving cleaning efficacy in hand-washing without increasing surfactant levels or water usage, thus addressing the limitations of existing detergents.
Implementation Method 1
The hydrophilic silica comprises less than 10% residual salt by total weight of the silica and is capable of forming upon hydration swollen silica particles having a particle size distribution Dv50 of from 1 μm to 100 μm
Data Source
AI summary
This relates to granular laundry detergent products characterized by efficient mass and volume compaction, fast dissolution or dispersion and enhanced suds profile, which are particularly useful for hand-washing fabric under suboptimal washing conditions.