Foaming Cleaning Composition Reduces Surface Damage
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Solution Overview
Problem
Conventional methods for cleaning masonry and external surfaces using high-pressure jet washers and concentrated hypochlorite solutions are hazardous, cause discolouration, damage surfaces, and push organic growth deeper into porous surfaces, leading to uneven cleaning and environmental issues.
Innovation Solution
A composition comprising sodium hypochlorite (1wt% to 5.5wt%), potassium silicate (0.3wt% to 3.0wt%), alkali hydroxide (0.01wt% to 0.5wt%), and a foaming agent, applied as a solution to external surfaces, which reduces the concentration of hypochlorite needed for effective cleaning while preventing deep penetration and surface damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If concentrated hypochlorite solutions are used for cleaning, then cleaning effectiveness is improved, but surface discolouration and environmental harm increase
Solution Approach 1:
The patent changes the concentration parameter of hypochlorite from conventional high levels (10-15%) to a lower range (0.5-5%), and introduces silicate additives to compensate for the reduced cleaning power, thereby maintaining effectiveness while reducing harmful effects on surfaces and environment
Solution Approach 2:
The patent creates a composite cleaning solution by combining hypochlorite with silicate additives (sodium silicate, potassium silicate, or calcium silicate), where the silicate component enhances cleaning effectiveness and provides surface protection, allowing lower hypochlorite concentrations to achieve the same cleaning result
2Productivity
If high pressure jet washers are used, then cleaning speed is improved, but surface damage and environmental impact increase
Solution Approach 1:
The patent replaces the mechanical high-pressure water jet system with a chemical cleaning solution that can be applied at low pressure, eliminating the need for diesel-powered pumps and reducing both surface damage from high-pressure impact and environmental harm from fuel combustion
3Reliability
If water jets are used to clean porous surfaces, then surface layer cleaning is improved, but organic growth is pushed deeper into the surface
Solution Approach 1:
The silicate additive acts as an intermediary that allows the cleaning solution to penetrate porous surfaces effectively without forcing contaminants deeper. The silicate forms a protective gel structure that facilitates gentle chemical action throughout the pore structure, removing organic growth from within without pushing it deeper into the substrate
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 solution provides an environmentally safe and efficient cleaning method that reduces surface damage, discolouration, and the risk to pets and plants, while maintaining effective removal of organic growth, with a lower ecological footprint and faster application time compared to conventional methods.
Implementation Method 1
concentrated hypochlorite-containing solutions
Implementation Method 2
a foaming agent
Implementation Method 3
potassium silicate 0.3wt% to 3.0wt%
Data Source
AI summary
An external surface cleaning composition comprising: sodium hypochlorite 1wt% to 5.5wt%; potassium silicate 0.3 wt% to 3.0wt%; alkali hydroxide 0.01 wt% to 0.5 wt%; a foaming agent; optional further ingredients; and water balance to 100%