Coated Detergent Particles Staining Reduction
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Solution Overview
Problem
Existing laundry detergent particles face issues with staining and photostability, particularly when containing dyes, which affect their performance and storage stability.
Innovation Solution
Development of coated detergent particles with specific dimensions and composition, featuring a surfactant core, inorganic salt coating, and a dye layer that reduces staining and enhances photostability, including a calcium-tolerant surfactant system and a preferred dye selection for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If dyes are added to detergent particles for product differentiation and consumer appeal, then the visual appeal and marketing value are improved, but staining of laundry and reduced photostability occur
Solution Approach 1:
An inorganic salt coating layer is introduced as an intermediary between the dye and the laundry fabric. This coating acts as a barrier that prevents direct contact between the dye and fabric, thereby eliminating staining while preserving the dye's visual appearance on the detergent particle surface.
Solution Approach 2:
A thin inorganic salt coating shell is applied to the detergent particle surface containing the dye. This shell provides protective functionality by preventing dye migration and staining during storage and washing, while maintaining the aesthetic appeal of the colored particle.
2Productivity
If conventional extrusion methods are used to manufacture detergent particles, then production efficiency is maintained, but particles require further drying and exhibit cylindrical shapes with length exceeding diameter
Solution Approach 1:
The extrusion process parameters are modified, specifically controlling the extrusion temperature to be below the melting point of the detergent mixture. This parameter change results in the formation of spherical particles instead of cylindrical noodles, eliminating the need for additional drying steps while maintaining high production efficiency.
Solution Approach 2:
The extrusion process utilizes controlled phase transitions of the detergent mixture. By maintaining temperature below the melting point during extrusion, the mixture remains in a semi-solid state that forms spherical particles upon extrusion, rather than melting and forming cylindrical shapes that require drying.
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 coated detergent particles exhibit reduced staining and increased photostability, ensuring better performance and storage stability, with the calcium-tolerant surfactant system minimizing the need for builders and maintaining effectiveness in various water conditions.
Implementation Method 1
the inorganic salts and the dye are present on the detergent particle as a coating
Implementation Method 2
a dye containing coating that give reduced staining. The invention may also increase the photostability of the dye in the product on storage
Data Source
AI summary
The present invention provides lenticular or disc detergent particles comprising (i) surfactant, (ii) inorganic salts and (iii) dye, wherein the inorganic salts and the dye are present on the detergent particle as a coating and the surfactant is present as a core. The dye containing coating gives reduced staining.