PVA Unit Dose Film With Glucan Ether for Fabric Freshness
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Solution Overview
Problem
Existing water-soluble unit dose articles comprising polyvinylalcohol films and cationically modified hydroxyethylcellulose negatively impact fabric freshness while providing fabric shape retention and softness benefits.
Innovation Solution
A water-soluble unit dose article comprising a polyvinylalcohol film and a cationically modified poly alpha-1,6-glucan ether compound, which forms a coacervate phase with anionic surfactants to enhance fabric shape retention and softness while improving fabric freshness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If cationically modified hydroxyethylcellulose is used in water-soluble unit dose articles, then fabric shape retention and fabric softness are improved, but fabric freshness is negatively impacted
Solution Approach 1:
The patent changes the chemical parameter of the polysaccharide from hydroxyethylcellulose to poly alpha-1,6-glucan ether compound, which alters the molecular structure and interaction properties. This parameter change maintains fabric shape retention and softness benefits while eliminating the negative impact on fabric freshness, as the poly alpha-1,6-glucan ether compound does not interfere with perfume delivery mechanisms
2Stability of the object's composition
If polyvinylalcohol film is used as water-soluble film, then water solubility and film integrity are achieved, but fabric freshness is negatively impacted when combined with cationic polysaccharides
Solution Approach 1:
The patent creates a composite material system combining polyvinylalcohol film with poly alpha-1,6-glucan ether compound. This composite approach maintains the film integrity benefits of polyvinylalcohol while replacing the problematic cationic polysaccharide component with a different chemical structure that does not negatively impact fabric freshness, achieving synergistic benefits
3Quantity of substance
If higher water content is added to the liquid laundry treatment composition, then fabric treatment efficacy is improved, but film compatibility is compromised
Solution Approach 1:
The patent changes the chemical composition parameter by using poly alpha-1,6-glucan ether compound instead of cationic polysaccharides, which alters the osmotic and interaction properties of the liquid composition. This allows higher water content to be incorporated while maintaining film compatibility, as the new polysaccharide does not create the same compatibility issues with the polyvinylalcohol film
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 article provides excellent fabric shape retention and softness with improved fabric freshness, and allows for higher water content without compromising film compatibility.
Implementation Method 1
a water-soluble unit dose article comprising a polyvinylalcohol film and a cationic poly alpha-1,6-glucan ether compound, which forms a coacervate phase with anionic surfactants
Data Source
Figure 1
AI summary
Water-soluble unit dose articles containing polyvinylalcohol films and a cationic poly alpha-1,6-glucan ether compound, methods of making said water-soluble unit dose articles and methods of using said water-soluble unit dose articles.