Laundry Detergent Particles Calcite Core Water Ingress
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Solution Overview
Problem
Large laundry detergent particles face challenges in maintaining integrity and flowability when exposed to atmospheric conditions, particularly due to water ingress and stickiness issues.
Innovation Solution
Incorporating powdered calcite into the surfactant core of carbonate-coated detergent particles, with specific dimensions and composition, enhances their longevity and flowability by reducing water ingress and stickiness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If powdered calcite is incorporated into the surfactant core, then particle integrity and flowability are improved, but particle complexity increases
Solution Approach 1:
The patent applies composite materials by incorporating powdered calcite (calcium carbonate) into the surfactant core, creating a multi-component particle structure. The core contains both surfactant and calcite powder, while the shell consists of carbonate coating, forming a composite particle that leverages the water-absorbing properties of calcite to maintain integrity and flowability under atmospheric conditions.
2Ease of operation
If powdered calcite is incorporated into the surfactant core, then flowability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-mixing the powdered calcite with the surfactant core materials before forming the detergent particles. This ensures uniform distribution of calcite throughout the core, which simplifies the overall manufacturing process by avoiding the need for complex multi-step coating or infiltration processes that would otherwise be required to achieve the same water-absorbing functionality.
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 use of calcite in the core stabilizes the detergent particles, improving their storage stability and flow characteristics, ensuring they remain free-flowing and maintain integrity over time.
Implementation Method 1
incorporating powdered calcite into a surfactant core of a carbonate coated large detergent particle aids the longevity of the integrity of the particle when the particle is exposed to atmospheric conditions
Data Source
AI summary
The present invention provides a coated detergent particle having perpendicular dimensions x, y and z, wherein x is from 0.5 to 2 mm, y is from 2 to 8mm, and z is from 2 to 8 mm, wherein the particle comprises: (i) from 20 to 39 wt % of a surfactant selected from: anionic and non-ionic surfactants; (ii) from 10 to 40 wt % of an inorganic salt coating selected from: sodium carbonate and/or sodium sulphate of which at least 5 wt % of the inorganic salt is sodium carbonate; and, (iii) from 10 to 40 wt % of calcite having a median particle size average diameter (D50) in the range from 10 to 70 microns, and wherein the inorganic salts and are present on the detergent particle as a coating and the surfactant is present a core with the calcite dispersed though the core.