Hypochlorite Bleach Composition for Gentle Cotton Stain Removal
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Solution Overview
Problem
Menstrual fluid and underarm perspiration stains on cotton fabrics are difficult to remove without damaging the fabric, as existing bleach solutions like Ultra Clorox Regular Bleach can disintegrate cotton fibers and leave behind residues, and current methods often require vigorous scrubbing or lengthy soaking.
Innovation Solution
A modified hypochlorite-containing solution is created by adding an alkali metal hydroxide, such as sodium hydroxide, to increase its concentration ratio with sodium hypochlorite, raising the pH to at least 11.8, which is then applied to the stain for an extended period to effectively remove hard-to-remove stains with minimal scrubbing and fabric damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hypochlorite-containing solution is used to remove stains, then cleaning effectiveness is improved, but fabric damage increases
Solution Approach 1:
The patent modifies the chemical parameters of the hypochlorite solution by adjusting pH to 11.8-13.0 and controlling the ratio of hypochlorite to hydroxide, which changes the solution's properties to reduce fabric damage while maintaining stain removal effectiveness. This directly addresses the contradiction by changing the solution composition parameters.
Solution Approach 2:
The patent introduces an intermediary substance (alkali metal hydroxide) that mediates between the hypochlorite and the fabric. The hydroxide acts as a buffer and stabilizer, reducing the direct harmful interaction between hypochlorite and cotton fibers while allowing the hypochlorite to continue functioning as a stain remover.
2Reliability
If conventional bleach is used, then stain removal capability is improved, but fabric strength deteriorates
Solution Approach 1:
The patent changes the pH parameter to 11.8-13.0 and controls the hypochlorite-to-hydroxide ratio, which modifies the chemical environment to be less destructive to fabric strength while preserving cleaning capability. The elevated pH with controlled hypochlorite concentration prevents excessive fiber degradation.
Solution Approach 2:
The patent applies a protective cushioning mechanism by pre-treating the fabric or applying the modified solution that contains stabilizing agents (hydroxide) before the hypochlorite can cause significant damage. This cushioning effect protects fabric strength while allowing stain removal to proceed.
3Reliability
If vigorous scrubbing is applied, then stain removal is improved, but fabric deterioration accelerates
Solution Approach 1:
The patent replaces the mechanical action of vigorous scrubbing with a chemically enhanced solution that requires minimal mechanical intervention. The modified hypochlorite solution with optimized pH and composition performs the cleaning function chemically, substituting the need for aggressive mechanical scrubbing that would damage fabric.
4Object-affected harmful factors
If hydrogen peroxide is used, then fabric safety is improved, but cleaning effectiveness decreases for set-in stains
Solution Approach 1:
The patent creates a composite cleaning solution that combines hypochlorite (for strong cleaning power against set-in stains) with hydroxide (for fabric safety and stability). This composite formulation achieves both fabric safety and high cleaning effectiveness, overcoming the limitation of hydrogen peroxide which is too mild for set-in stains.
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 modified solution effectively removes fresh, set-in, or old stains like menstrual fluid and perspiration without damaging cotton fabrics, as it stabilizes sodium hypochlorite and enhances its cleaning power while reducing its harmful effects on fabric, allowing for quick and gentle stain removal.
Implementation Method 1
adding an alkali metal hydroxide, such as sodium hydroxide, to increase its concentration ratio with sodium hypochlorite, raising the pH to at least 11.8
Implementation Method 2
it stabilizes sodium hypochlorite and enhances its cleaning power while reducing its harmful effects on fabric
Implementation Method 3
A typical, undiluted Ultra Clorox Regular Bleach solution contains 6-7.35 wt % of sodium hypochlorite... contacting the modified solution with a stain on a soft fabric article to remove the stain
Data Source
AI summary
Methodologies and equipment for using a hypochlorite solution to remove menstrual fluid, underarm perspiration or other hard-to-remove stains from soft fabric articles with reduced damage to the fabric articles when compared with popular chlorine bleaches. The soft fabric articles preferably are in white, although the present invention can also be applied to articles in other colors. In one embodiment, the weight concentration ratio of the alkali metal hydroxide over the hypchlorite salt in the hypochlorite solution is no less than 1:12.5. The hypochlorite solution may contain at least 0.2% by weight of sodium hydroxide and/or have a pH of at least 11.8.