Dust-Collecting Filter Coating for Uniform, Peel-Resistant Fine Powder Capture
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Solution Overview
Problem
Conventional dust collecting filters face issues with the dust collecting layer peeling off due to contact with sharp materials and poor dispersibility of finer particles, leading to non-uniform coating and reduced effectiveness in capturing fine powders.
Innovation Solution
A coating solution containing silica fine particles, dopamine hydrochloride as a dispersant, and an adhesive is used to enhance bonding and dispersibility, allowing for a uniform and strong dust collecting layer, even with fine particles as small as 4 µm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resin fine particles are used to form the dust collecting layer, then the filter can collect dust particles, but the dust collecting layer peels off when contacted with sharp materials
Solution Approach 1:
Silica fine particles serve as an intermediary bonding agent between the resin fine particles and the filter element material. The silica particles form a bridge structure that mechanically interlocks with both surfaces, preventing direct contact and peeling between the resin layer and the filter substrate while maintaining dust collection functionality.
2Reliability
If the particle size of resin is reduced to collect finer dust, then the collection efficiency for fine powders improves, but the dispersibility in coating solution deteriorates
Solution Approach 1:
Silica fine particles act as a dispersing intermediary that prevents aggregation of ultra-fine resin particles in the coating solution. The silica particles create steric hindrance and maintain spatial separation, enabling uniform distribution of sub-5μm resin particles that would otherwise clump together and settle.
Solution Approach 2:
The invention changes the particle size parameter of the coating material from conventional 5-10μm resin particles to ultra-fine 0.1-5μm particles combined with silica. This parameter change enables collection of finer dust while the silica component compensates for the reduced dispersibility inherent in ultra-fine particles.
3Strength
If uniform coating of fine particles is achieved, then the dust collecting layer becomes strong and adhesive, but the process complexity increases
Solution Approach 1:
The invention optimizes the particle size distribution parameter of the coating material, using ultra-fine particles (0.1-5μm) that naturally form more uniform coatings at lower concentrations. This parameter change reduces the need for complex multi-layer coating processes while achieving the required adhesive strength and uniformity.
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 results in a filtration element with improved adhesive strength, uniformity, and enhanced collection performance, resisting water and maintaining structural integrity even when bent, effectively capturing fine powders without clogging.
Implementation Method 1
dopamine hydrochloride, which serves as a dispersant for the silica fine particles
Implementation Method 2
applying the coating solution on the surface of a filter element material consisting of a resin sintered body and then drying the coating solution to form the dust collecting layer
Implementation Method 3
an adhesive; wherein the average particle size D50 value of the powder is 0.1 to 30.0 μm, and the silica fine particles are in an amount of 1 wt% to 50 wt% based on the weight of the coating solution
Data Source
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AI summary
Provided is a coating solution for forming a dust collecting layer, wherein the coating solution can be applied uniformly, and the formed dust collecting layer does not easily peel off from a filter element material, and allows to collect fine powder products having a small particle size. The coating solution is for forming a dust collecting layer in a dust collecting filter, and contains a fine powder, dopamine hydrochloride, and an adhesive.