Unit Dose Fabric Softener with Coacervate Film
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Solution Overview
Problem
Conventional fabric softening compositions often require inconvenient manual addition during the rinse cycle and can leave undesirable residues or provide insufficient softening benefits, with a growing consumer preference for liquid unit-dose softening-through-the-wash products.
Innovation Solution
A fabric care composition comprising a unit dose of fabric softening active encapsulated in a water-soluble film, utilizing a coacervate with a cationic polymer and silicone, which can be added in the wash cycle to provide effective softening without visible residue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fabric softening compositions are added during the rinse cycle, then fabric softening benefit is provided, but consumer convenience deteriorates due to manual addition requirement
Solution Approach 1:
The fabric softening composition is divided into unit dose packets, each containing a predetermined amount of softening agent. These segmented units can be automatically dispensed or manually added in controlled portions, eliminating the need for consumers to measure and add large volumes of liquid softener, thus improving convenience while maintaining softening effectiveness
Solution Approach 2:
The fabric softening agent is pre-packaged in unit dose packets that can be prepared in advance and stored. This preliminary action allows the softening benefit to be readily available without requiring consumer intervention during the rinse cycle, as the pre-packaged doses can be automatically dispensed or easily added at the appropriate time
2Ease of operation
If fabric softening compositions are provided as tablets, then unit dose convenience is improved, but visible residue is deposited on fabrics
Solution Approach 1:
The invention changes the physical and chemical parameters of the fabric softening composition by using soluble salts of fatty acids (such as sodium stearate, potassium oleate) instead of traditional tablet formulations. These salts dissolve completely in water to form clear solutions that deposit as invisible molecular layers on fabric, eliminating visible residue while maintaining the unit dose convenience through pre-packaged liquid or gel formulations
Solution Approach 2:
The fabric softening composition uses a composite system combining soluble fatty acid salts with co-surfactants and stabilizers. This composite material formulation ensures complete dissolution in water, prevents precipitation or crystallization that would cause visible residue, while maintaining effective fabric softening properties through the synergistic interaction of multiple components
3Ease of operation
If STW compositions are added in the wash cycle, then consumer convenience is improved by eliminating separate conditioning step, but effective deposition of softening active on fabric becomes challenging
Solution Approach 1:
The invention uses soluble fatty acid salts as intermediary compounds that can effectively bridge the wash cycle environment and fabric surface. These intermediaries are designed to remain stable in the presence of detergent and wash conditions, then deposit onto fabric during or after the wash cycle, ensuring effective softening benefit even when added in the wash cycle rather than the rinse cycle
Solution Approach 2:
The composition parameters are optimized to change from a stable pre-packaged form to an active deposition form during the wash cycle. The soluble salts maintain stability in the wash environment but undergo phase or solubility changes that promote fabric deposition, ensuring reliable softening benefit while maintaining consumer convenience of single-step addition
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 effectively softens fabrics by depositing the silicone active uniformly, providing noticeable softening benefits while avoiding residue and simplifying the application process.
Implementation Method 1
utilizing a coacervate with a cationic polymer and silicone
Implementation Method 2
depositing the silicone active uniformly
Data Source
AI summary
The articles, compositions, and kits of the present invention are useful for conditioning fabric.