Liquid Composition With Perfume Capsules for Leakage Control
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Solution Overview
Problem
Laundry compositions with perfume capsules face issues of perfume leakage and oxidation of ingredients, particularly in water-soluble unit-dose articles, which affect the availability and stability of perfumes and other components.
Innovation Solution
A unit-dose article comprising a liquid composition with a non-aqueous solvent, specifically alcohol alkoxylated nonionic surfactants, ethylene oxide-propylene oxide triblock copolymers, and polyglycerol, which reduces perfume leakage and maintains composition stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If perfume capsules are used in laundry compositions, then perfume protection and controlled release are improved, but perfume leakage from capsules occurs
Solution Approach 1:
A non-aqueous solvent system comprising polyglycerol (5-50 wt%), alcohol alkoxylated nonionic surfactant (10-40 wt%), and ethylene oxide-propylene oxide triblock copolymer (5-20 wt%) is introduced as an intermediary medium between the perfume capsules and the aqueous environment. This solvent system reduces surface tension and prevents direct water contact with the capsule shell, thereby minimizing perfume leakage while maintaining capsule integrity throughout the wash cycle.
2Duration of action of moving object
If perfume capsules are used in laundry compositions, then after-wash freshness is improved, but oxidation of other ingredients occurs
Solution Approach 1:
The non-aqueous solvent system creates a chemically inert environment that prevents oxidation reactions. The polyglycerol-based solvent system with nonionic surfactants and triblock copolymers forms a stable matrix that excludes oxygen and other reactive species from contacting sensitive perfume ingredients and laundry composition components, thereby preserving ingredient stability while maintaining long-lasting freshness.
3Ease of operation
If water-soluble unit-dose articles are used, then dosing precision and convenience are improved, but design constraints and ingredient migration increase
Solution Approach 1:
The invention changes the physical-chemical parameters of the laundry composition by using a non-aqueous solvent system with specific viscosity, surface tension, and solubility characteristics. This allows the composition to remain stable in a compact unit-dose format while preventing ingredient migration during storage and transport. The optimized solvent ratios ensure compatibility with water-soluble films and maintain composition integrity until dissolution in the wash cycle.
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 minimizes perfume leakage and maintains the integrity of the perfume and other ingredients, enhancing the freshness delivery and cleaning performance while ensuring compatibility with water-soluble films.
Implementation Method 1
a non-aqueous solvent system, has been found to reduce perfume leakage from perfume capsules
Data Source
AI summary
A unit-dose article comprising a water-soluble film creating a first compartment and a second compartment, wherein the first compartment comprises a first liquid composition wherein the first liquid composition comprises: i) from more than 5% to 90% by weight of the first liquid composition of an alcohol alkoxylated nonionic surfactant; ii) less than 20% by weight of the first liquid composition of polyethylene glycol having a number average molecular weight of from 200 Da to 1000 Da and/or less than 4% by weight of the first liquid composition of propylene glycol; iii) from 1 to 50% by weight of the first liquid composition of perfume capsules; iv) from 1 to 25% by weight of the first liquid composition of water; and v) less than 5% by weight of the first liquid composition of anionic surfactant.