High-Density Dye Particles in Solid Detergent
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Solution Overview
Problem
Colored fabric hueing dye particles in laundry detergents often bleed, compromising their stability and aesthetic benefits, and are not consistently incorporated across all product portfolios due to logistical challenges.
Innovation Solution
Formulating colored fabric hueing dye agent particles with a water-soluble inorganic salt, such as sodium carbonate, to increase envelope density to at least 1.9 g/cm3, allowing for higher dye loading and improved stability, thereby reducing bleeding and enhancing whiteness performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If colored fabric hueing dye particles are formulated with lower density, then they are easier to manufacture and handle, but they are more prone to bleeding and have poor stability
Solution Approach 1:
The invention changes the density parameter of the hueing dye particle by formulating it with inorganic salt carriers (such as sodium sulfate, sodium carbonate, or silica) to achieve a density of at least 1.9 g/cm³. This parameter change resolves the contradiction by providing both improved stability (reduced bleeding) and manufacturability through controlled particle formation processes
Solution Approach 2:
The invention creates a composite particle structure where the fabric hueing dye agent is combined with inorganic salt carriers in specific weight ratios (6-10 wt% dye agent). This composite approach allows the particle to achieve both the required density for stability and the appropriate dye loading for performance, while remaining manufacturable
2Reliability
If higher levels of fabric hueing dye agent are incorporated into particles, then whiteness performance is improved, but bleeding increases and stability deteriorates
Solution Approach 1:
The invention changes the density parameter of the particle to at least 1.9 g/cm³, which enables higher dye agent loading (6-10 wt%) while maintaining stability. The increased density prevents bleeding even at higher dye concentrations, resolving the contradiction between quantity of dye and stability
Solution Approach 2:
The inorganic salt carrier acts as an intermediary substance that allows higher levels of fabric hueing dye agent to be incorporated without causing bleeding. The carrier provides a stable matrix that contains the dye agent, enabling increased dye loading while maintaining particle integrity and preventing dye transfer
3Object-affected harmful factors
If colored hueing dye particles are made visible for aesthetic benefits, then consumer appeal is improved, but bleeding into the detergent powder increases
Solution Approach 1:
The invention changes the density parameter of the colored hueing dye particle to at least 1.9 g/cm³ through formulation with inorganic salt carriers. This parameter change allows the particles to maintain their color for aesthetic visibility while the high density prevents bleeding, resolving the contradiction between visibility and bleeding
Data Source
AI summary
The present invention relates to a solid detergent cleaning composition comprising coloured fabric hueing dye agent particles and a detergent ingredient. The coloured fabric hueing dye agent particles comprise (a) from 6.0wt% to 10wt% by weight thereof of the fabric hueing dye agent and (b) a water-soluble inorganic salt, wherein the coloured fabric hueing dye agent particles have an envelope density of at least 1.9 g/cm3 as measured by Geopyc method. The coloured fabric hueing dye agent particles show reduced staining and bleeding of the fabric hueing dye agent.