Dust-Capturing Foam Composition Adhesion and Drainage
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Solution Overview
Problem
Existing foam compositions for capturing dust particles, such as 'Foamshield', have inadequate adhesion to vertical surfaces and ceilings, leading to rapid drainage and insufficient coverage, which limits their effectiveness as dust catchers.
Innovation Solution
A water-based foamable mixture comprising 2 to 5% by weight of a starting composition that includes glycol ether, fatty alcohol, amine oxide, and fatty alcohol sulphate fractions, which improves adhesion and stability of the foam layer, extending its drainage time and maintaining effective coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a foamable mixture is applied to capture dust particles, then dust particle capture capability is improved, but the foam drainage time is too short causing rapid loss of coverage
Solution Approach 1:
The patent modifies the chemical composition parameters of the foamable mixture by incorporating specific surfactants (fatty alcohol sulphate fraction 1-20% wt, amine oxide fraction 0.1-10% wt) and glycol ether fraction (1-20% wt) to alter the foam's physical properties. These parameter changes extend the drainage time from minutes to at least 20 minutes while preserving dust capture effectiveness through optimized surfactant ratios and concentrations.
2Area of stationary object
If foam is applied to vertical walls or ceilings, then dust particle capture coverage is improved, but adhesion is insufficient causing foam to slide down rapidly
Solution Approach 1:
The patent creates a composite foam system by combining multiple surfactant types (fatty alcohol sulphate and amine oxide) with glycol ether and fatty alcohol components. This composite formulation produces synergistic effects that enhance adhesion strength on vertical surfaces while maintaining expansive coverage capability, allowing the foam to resist gravity-induced sliding for extended periods.
3Speed
If foam flows quickly on substrate surfaces, then initial distribution is rapid, but coverage stability is lost before dust-catching operations can be completed
Solution Approach 1:
The patent exploits the thixotropic dynamic property of the foam, where the foam exhibits different flow characteristics under different conditions. Initially, the foam flows readily to achieve rapid distribution and coverage. Once applied, the foam structure stabilizes and maintains its position, providing sustained coverage stability throughout the dust-catching operation period of at least 20 minutes.
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 improved foamable mixture achieves better adhesion to vertical surfaces and ceilings, significantly increasing the drainage time of the foam layer to at least 20 minutes, thereby enhancing its ability to capture dust particles and maintain effective coverage during dust-catching operations.
Implementation Method 1
The improved foamable mixture achieves better adhesion to vertical surfaces and ceilings, significantly increasing the drainage time of the foam layer to at least 20 minutes
Implementation Method 2
a foamable mixture for a foam which is suitable for capturing dust particles
Implementation Method 3
maintaining effective coverage... enhancing its ability to capture dust particles
Data Source
Figure 1
Figure 2a~2b
Figure 3
AI summary
Starting composition for a foam which is suitable for capturing dust particles, comprising: a glycol ether fraction, a fatty alcohol fraction, an amine oxide fraction, and, a fatty alcohol sulphate fraction. Water-based foamable mixture which comprises the starting composition. Method for capturing dust particles which may be released when working on a substrate, using the foamable mixture. Spraying device, comprising: a tank for a foamable mixture which is pressurized by a gas, a spraying head for spraying the foamable mixture, a conduit for feeding the foamable mixture from the tank to the spraying head, a gas inlet in the conduit for mixing the gas and the foamable mixture, wherein the tank is a closed chamber without inlet, which comprises a quantity of the foamable mixture.