Liquid Laundry Detergent Fragrance Delivery Segmentation
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Solution Overview
Problem
Liquid laundry detergents face challenges in delivering fragrance effectively during the laundry process, particularly in the 'damp' phase after washing, while also aiming to reduce manufacturing costs and raw material wastage, especially for high-value ingredients like fragrances.
Innovation Solution
A liquid laundry detergent composition incorporating a combination of free fragrance droplets and encapsulated fragrance within polymeric microparticles, specifically aminoplast microcapsules, with a deposition aid attached to the shell for enhanced substrate adherence, allowing controlled fragrance release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If encapsulated fragrance is used to improve fragrance deposition and delay release, then fragrance performance in dry phase is improved, but fragrance delivery in damp phase may be compromised
Solution Approach 1:
The fragrance system is segmented into two distinct components: encapsulated fragrance (in aminoplast microcapsules) for delayed release during wear, and free fragrance droplets for immediate impact during damp phase. This segmentation allows each component to specialize in delivering fragrance at different stages, resolving the contradiction between delayed release and consistent performance across phases.
Solution Approach 2:
Different fragrance formulations are applied with different local qualities - the encapsulated fragrance provides slow-release properties targeted at dry phase performance, while the free fragrance droplets provide immediate volatility targeted at damp phase performance. This local quality differentiation ensures optimal fragrance delivery at each specific stage without compromise.
2Quantity of substance
If total fragrance content is increased to improve fragrance experience, then fragrance intensity is improved, but manufacturing cost and raw material wastage increase
Solution Approach 1:
The invention changes the parameters of fragrance delivery rather than simply increasing quantity. By adjusting the ratio of encapsulated to free fragrance (optimized at 40:60 to 60:40), and controlling the total fragrance content at a reduced level (0.6 to 0.9% by weight), the system achieves effective fragrance performance through improved delivery efficiency rather than brute-force quantity increase, thereby reducing manufacturing costs and raw material wastage.
3Speed
If free fragrance droplets are used for immediate fragrance delivery, then damp phase fragrance is improved, but fragrance deposition and delayed release are compromised
Solution Approach 1:
The fragrance system is segmented into two distinct components: encapsulated fragrance (in aminoplast microcapsules) for delayed release during wear, and free fragrance droplets for immediate impact during damp phase. This segmentation allows each component to specialize in delivering fragrance at different stages, resolving the contradiction between delayed release and consistent performance across phases.
Solution Approach 2:
The invention merges two contrasting fragrance delivery mechanisms - the immediate delivery of free fragrance droplets and the delayed release of encapsulated fragrance - into a single unified composition. This combination allows the system to achieve both fast initial impact and prolonged sustained release, resolving the contradiction between speed and duration.
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 provides a balanced fragrance experience across key laundry stages without increasing total fragrance content, reducing costs and wastage, and maintaining performance in both damp and dry phases.
Implementation Method 1
a deposition aid is attached to the outside of the shell by means of covalent bonding
Implementation Method 2
a fragrance formulation (f2) which is entrapped within discrete polymeric microparticles dispersed in the composition, in which the polymeric microparticles are polymeric core-shell microcapsules
Implementation Method 3
a fragrance formulation (f1) which is in the form of free droplets dispersed in the composition
Data Source
AI summary
The invention provides a liquid laundry detergent composition comprising: a) from 3 to 60% (by weight based on the total weight of the composition) of one or more detersive surfactants selected from non-soap anionic surfactants, nonionic surfactants and mixtures thereof; b) from 0.01 to 1 % (by weight based on the total weight of the composition) of a fragrance formulation (f1) which is in the form of free droplets dispersed in the composition; c) from 0.01 to 1 % (by weight based on the total weight of the composition) of a fragrance formulation (f2) which is entrapped within discrete polymeric microparticles dispersed in the composition; in which the total amount of fragrance formulation (f1) and fragrance formulation (f2) ranges from 0.6 to 0.9% (by weight based on the total weight of the composition); and in which the weight ratio of fragrance formulation (f1) to fragrance formulation (f2) the composition ranges from 40:60 to 60:40.