Dishwashing Detergent Mixed Builder System for Tea Stain Removal
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Solution Overview
Problem
Automatic dishwashing compositions struggle to effectively remove tea stains, especially in hard water with high bicarbonate levels, while maintaining good cleaning and shine, and existing unit dose products are limited by volume constraints.
Innovation Solution
A dishwashing composition featuring a mixed builder system with a soluble builder and crystalline silicate in a specific weight ratio, combined with a bleaching system and low carbonate levels, which provides effective tea stain removal and shine across a range of water hardness, even in high bicarbonate conditions, and is suitable for unit dose form.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a high level of carbonate is used to improve cleaning performance, then cleaning effectiveness is improved, but filming and spotting of washed items worsens
Solution Approach 1:
The patent applies parameter changes by precisely controlling the carbonate level at 5-20% by weight and maintaining a specific soluble builder to crystalline silicate ratio of 8:1 to 15:1. This optimization of chemical parameters enables effective tea stain removal while preventing filming and spotting, resolving the contradiction between cleaning effectiveness and surface quality.
Solution Approach 2:
The patent uses a composite builder system combining soluble builder (MGDA, citric acid, or GLDA) with crystalline silicate (sodium phyllosilicate). This composite approach creates synergistic effects where the combination provides superior cleaning performance without the harmful filming and spotting effects that would occur with high carbonate levels alone.
2Ease of operation
If unit dose format is used to improve convenience and dosing accuracy, then ease of operation is improved, but the amount of chemistry available per wash is limited
Solution Approach 1:
The patent optimizes the concentration and efficiency of chemical components within the unit dose constraints. By using a highly effective mixed builder system and optimizing carbonate levels, the composition achieves strong cleaning performance with reduced overall chemical quantities, making it suitable for unit dose format while maintaining effectiveness.
3Reliability
If a mixed builder system with specific ratio is used to achieve good cleaning and shine, then cleaning performance is improved, but formulation precision requirements increase
Solution Approach 1:
The patent establishes specific parameter ranges for the mixed builder system: soluble builder at 15-40% by weight, crystalline silicate at 1-10% by weight, and their ratio maintained between 8:1 to 15:1. These defined parameters provide a clear formulation target that balances performance requirements with manufacturing feasibility, reducing the burden of extreme precision while maintaining effective cleaning and shine.
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 achieves excellent cleaning and shine performance, including effective tea stain removal, across various water hardness levels, even with high bicarbonate, and is well-suited for unit dose presentation, ensuring effective cleaning and care for dishes.
Implementation Method 1
The soluble builder comprises a complexing agent, a phosphonate and a dispersant polymer
Implementation Method 2
The composition also comprises a bleaching system. The bleaching system comprises bleach, a bleach catalyst and a bleach activator
Implementation Method 3
The soluble builder comprises a complexing agent, a phosphonate and a dispersant polymer
Data Source
AI summary
An automatic dishwashing cleaning composition comprising:a) a mixed builder system comprising soluble builder and crystalline silicate wherein the soluble builder comprises a complexing agent, a phosphonate and a dispersant polymer and wherein the level of each soluble builder in the composition is:a1) from 15% to 40% by weight of the composition of the complexing agent;a2) from 2% to 7% by weight of the composition of the phosphonate; anda3) from 1% to 7% by weight of the composition of the dispersant polymer wherein the soluble builder and the crystalline silicate are in a weight ratio of from 8:1 to 15:1b) a bleaching system comprising bleach, a bleach catalyst and a bleach activator; andc) from 0% to 20% by weight of the composition of carbonate.