Laundry Article Nonwoven Substrate Coating Spotting
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Solution Overview
Problem
Conventional laundry detergents and fabric conditioners face challenges in delivering fragrance and anti-static/softening benefits due to incompatibility issues between quaternary ammonium compounds and anionic surfactants, leading to low fragrance retention and spotting during the washing and drying process.
Innovation Solution
A laundry article featuring a water-insoluble nonwoven substrate coated with a detergent composition and a fabric conditioning composition containing quaternary ammonium cationic surfactants and additives like trialkyl glycerides and fatty acids, which adjust the melting point and firmness to prevent spotting and enhance fragrance delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If highly concentrated solid fabric conditioning compositions are applied to the substrate, then conditioning benefits are enhanced, but firmness increases causing the zone to break into smaller pieces during washing
Solution Approach 1:
The fabric conditioning composition is formulated as a composite material combining quaternary ammonium cationic surfactants with waxes and oils. This composite structure provides both the desired conditioning benefits and sufficient firmness to maintain zone integrity during the washing process, preventing breakdown into smaller pieces that could cause spotting.
Solution Approach 2:
The physical parameters of the fabric conditioning composition are carefully controlled, including its melting point and firmness. By adjusting these parameters through the selection of specific waxes and oils, the composition maintains adequate firmness to prevent zone breakdown during washing while still being effective at delivering conditioning benefits to the fabric.
2Loss of energy
If fragrance is delivered through the wash liquor, then fragrance is lost in the rinse water and wasted, but adding heavily scented dryer sheets achieves high fragrance retention
Solution Approach 1:
The invention merges the functions of detergent and fabric conditioning including fragrance delivery into a single laundry article. The fabric conditioning composition zone contains fragrance that is delivered to the fabric during the drying cycle, combining what were previously separate functions (detergent in wash, fragrance in dryer) into one integrated product that performs both roles.
Solution Approach 2:
The laundry article is designed as a multi-functional product that performs cleaning, fabric conditioning, and fragrance delivery all in one article. The fabric conditioning composition zone serves multiple purposes: providing anti-static benefits, softening, and fragrance retention, eliminating the need for separate specialized products for each function.
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 provides effective cleaning and conditioning properties while minimizing spotting and improving fragrance retention on fabrics, ensuring good cleaning and conditioning performance without significant fabric damage or loss of fragrance.
Implementation Method 1
an additive selected from the group consisting of trialkyl glycerides, fatty acids and mixtures thereof... which adjust the melting point and firmness to prevent spotting
Implementation Method 2
A significant portion of the fragrance contained in the detergent does not adsorb onto the fabrics and instead is drained away and wasted
Data Source
AI summary
The invention discloses a laundry article used for both cleaning and conditioning fabrics comprising a water-insoluble nonwoven substrate and coated thereon into at least one zone each a detergent composition and a fabric conditioning composition. The fabric conditioning composition comprises a quaternary ammonium cationic surfactant, an alkoxylated fatty alcohol and a fatty acid.