Liquid Laundry Composition PVP Bleach Ratio
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Solution Overview
Problem
Current laundry compositions struggle to effectively remove stains containing polyphenolic compounds like turmeric and curry without causing discolouration or dye transfer, especially when using traditional bleaching agents like hydrogen peroxide.
Innovation Solution
A liquid laundry composition is developed with a higher weight ratio of homopolymer of 1-vinyl-2-pyrrolidone (PVP) to oxygen-based bleach, specifically between 0.009:1, which includes between 1 wt.% and 15 wt.% oxygen-based bleach and 0.001 wt.% to 10 wt.% PVP, along with surfactants and other additives, to enhance stain removal and inhibit dye transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional bleaching agents like hydrogen peroxide are used to remove stains, then stain removal capability is improved, but discolouration and dye transfer occur
Solution Approach 1:
The patent changes the concentration parameters by using a higher weight ratio of PVP (0.001-10 wt.%) relative to oxygen-based bleach (1-15 wt.%), with the weight ratio of PVP to oxygen-based bleach being higher than 0.009:1. This parameter optimization allows the composition to effectively remove stains while minimizing discolouration and dye transfer.
Solution Approach 2:
PVP acts as an intermediary substance that mediates between the oxygen-based bleach and the fabric. It forms a protective complex with the bleach, allowing stain removal while preventing direct harmful interaction with the fabric dyes, thus reducing discolouration and dye transfer.
2Object-affected harmful factors
If dye transfer inhibitors are used to prevent discolouration, then protection of garment colour is improved, but activity is reduced by traditional bleaching agents
Solution Approach 1:
The patent creates a composite system combining PVP (which has dye transfer inhibitor properties) with oxygen-based bleach in a specific weight ratio higher than 0.009:1. This composite composition maintains the dye transfer inhibition activity while the PVP protects against deactivation by the bleach.
Solution Approach 2:
The patent converts the potentially harmful interaction between bleach and dye transfer inhibitors into a beneficial effect. By using PVP in higher proportions with the oxygen-based bleach, the composition that would normally deactivate inhibitors now becomes the optimal condition for maintaining inhibitor activity and achieving both stain removal and colour protection.
3Productivity
If higher concentration of oxygen-based bleach is used, then stain removal efficiency is improved, but harmful effects on fabric increase
Solution Approach 1:
The patent optimizes the concentration parameters by defining specific ranges: oxygen-based bleach at 1-15 wt.% and PVP at 0.001-10 wt.%, with the weight ratio of PVP to bleach higher than 0.009:1. This parameter optimization achieves effective stain removal while controlling harmful effects through the protective作用 of PVP.
Solution Approach 2:
PVP serves as a protective intermediary that allows higher concentrations of oxygen-based bleach to be used effectively for stain removal while preventing direct contact between the bleach and fabric, thus reducing fabric damage and discolouration.
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 effective removal of polyphenolic stains such as turmeric and curry while reducing dye transfer, demonstrating a synergistic effect between PVP and oxygen-based bleach, outperforming conventional methods that often result in discolouration.
Implementation Method 1
the weight ratio of the homopolymer of 1-vinyl-2-pyrrolidone to the oxygen-based bleach is higher than 0.009:1
Implementation Method 2
For the removal of stains containing polyphenols, bleaching agents, preferably in combination with enzymes, are normally used
Implementation Method 3
The composition may further comprise between 1 wt. % and 35 wt. % of one or more surfactants
Data Source
AI summary
The present invention relates to a liquid laundry composition comprising: between 1 wt. % and 15 wt. % of an oxygen-based bleach, based on the total weight of the composition; between 0.001 wt. % and 10 wt. % of a homopolymer of 1-vinyl-2-pyrrolidone (PVP), based on the total weight of the composition; wherein the weight ratio of the homopolymer of 1-vinyl-2-pyrrolidone to the oxygen-based bleach is higher than 0.009:1. It also relates to a method of washing a garment using the laundry composition and to the use of the laundry composition for the removal of stains from a garment, and preferably dye transfer reduction or inhibition from a garment.