Phosphate-Free Liquid Detergent Composition for Reduced Microfiber Release
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Solution Overview
Problem
Existing laundry detergents fail to effectively reduce the release of microfibers, particularly synthetic microfibers, during the laundering process while maintaining good cleaning capability.
Innovation Solution
A liquid phosphate-free detergent composition comprising specific chelating agents, anionic and non-ionic surfactants, and a balanced ratio of alkali metal and ethanolammonium salts, which minimizes microfiber release during laundering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional laundry detergents are used, then cleaning capability is maintained, but microfiber release is high
Solution Approach 1:
The patent applies parameter changes by modifying the chemical composition parameters of the detergent: using specific chelating agents (citric acid, MGDA, GLDA) in optimized weight ratios (chelating agents 0.5-5% wt, surfactants 5-20% wt), and adjusting the balance between anionic and non-ionic surfactants. These parameter changes reduce microfiber release while preserving cleaning effectiveness through enhanced water softening and soil removal mechanisms.
Solution Approach 2:
The patent employs composite materials by formulating a multi-component detergent system that combines specific chelating agents (citric acid, methyl glycine diacetate, glutamic acid diacetate) with anionic surfactants (alkyl ether sulfonates) and non-ionic surfactants (alkyl polyglycosides, alcohol ethoxylates). This composite formulation creates synergistic effects that reduce microfiber release while maintaining cleaning performance.
2Object-affected harmful factors
If washing temperature is reduced to reduce microfiber release, then environmental impact is reduced, but cleaning capability deteriorates
Solution Approach 1:
The patent applies parameter changes by optimizing the chemical composition to compensate for lower thermal energy input. The specific chelating agents and surfactant combinations are designed to enhance chemical cleaning mechanisms that are effective at lower temperatures, allowing reduced washing temperatures (20-40°C) to achieve both microfiber reduction and adequate cleaning through improved water softening and emulsification properties.
3Object-affected harmful factors
If washing cycle time is reduced to reduce microfiber release, then energy consumption is reduced, but cleaning capability deteriorates
Solution Approach 1:
The patent applies parameter changes by formulating a detergent with high solubility and rapid activation characteristics. The chosen chelating agents and surfactants are designed to quickly dissolve and become effective at the start of the wash cycle, enabling shorter washing times (15-30 minutes) to achieve sufficient cleaning through enhanced initial cleaning power and efficient soil removal mechanisms.
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 reduced microfiber release, especially of polyester microfibers, while maintaining effective cleaning performance, even at lower washing temperatures and shorter cycles.
Implementation Method 1
The composition comprises (A) at least two chelating agents, (A1) one being selected from alkali metal salts of citric acid, and (A2) one being selected from alkali metal and ethanolammonium salts of methyl glycine diacetate (MGDA) and of glutamic acid diacetate (GLDA)
Implementation Method 2
The composition comprises (B) at least one anionic surfactant according to the general formula (I) CnH2n+1-O(CH2CH2O)x-SO3M, and (C) at least two non-ionic surfactants
Data Source
AI summary
Liquid phosphate-free detergent composition comprising (A) at least two chelating agents, (A1) one being selected from alkali metal salts of MGDA and GLDA, (A2) one being selected from alkali metal salts of citric acid, (B) at least one anionic surfactant according to general formula (I): CnH2n+1-O(CH2CH2O)x-SO3M, (C) at least two non-ionic surfactants, (C1) one being selected from alkyl polyglycosides, (C2) and at least one further non-ionic surfactant, the weight ratio of all chelating agent (A) to all anionic surfactant (B) being in the range of from 1:7 to 1:2.5, wherein: n is a number in the range of from 10 to 18, M is selected from alkali metals, x is a number in the range of from 1 to 5, wherein said detergent composition has a non-volatile content in the range of from 10 to 30% by weight.