Transparent Aldehyde Adsorbent Liquid for Uniform Coating
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Solution Overview
Problem
Existing aldehyde gas adsorbents face challenges such as aggregation, poor storage stability, and difficulty in forming uniform coatings, especially when used in dark-colored products, due to issues with binder usage and high water content, leading to inadequate adsorption performance and appearance concerns.
Innovation Solution
A transparent aldehyde-gas-adsorbing liquid is developed by mixing a dihydrazide compound with a metal oxide sol at specific ratios, eliminating the need for binders and enhancing storage stability, allowing for efficient spray coating and maintaining appearance integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a powdered adsorbent is dispersed in a binder to form a coating, then the adsorbent can be applied to substrates, but the adsorbent powder aggregates and precipitates, forming a nonuniform suspension that is difficult to disperse uniformly
Solution Approach 1:
The patent changes the physical state of the adsorbent from powdered solid to liquid form, and adjusts the concentration parameters to create a stable liquid adsorbent solution that does not aggregate or precipitate, enabling uniform coating without the dispersion problems of powdered materials
Solution Approach 2:
The patent removes the binder component from the traditional powder-binder-coating system, extracting the problematic binder that causes aggregation and precipitation, and uses a liquid adsorbent solution that can be applied directly without binders
2Reliability
If a powdered adsorbent is used for coating, then adsorption performance can be achieved, but the coated surface becomes white, making it impossible to use for dark-colored products or products requiring design
Solution Approach 1:
The patent changes the physical state from powder to liquid and optimizes the concentration parameters to create a transparent or colored liquid adsorbent solution that does not whiten the substrate, allowing application to dark-colored products while maintaining adsorption performance
3Ease of manufacture
If a binder is used to coat the adsorbent powder, then the coating can be formed on the substrate, but the adsorbent powder is buried in the binder resin, degrading adsorption performance
Solution Approach 1:
The patent removes the binder from the coating system entirely, using a liquid adsorbent solution that can be applied directly to the substrate without binders, thereby preventing the adsorbent from being buried and maintaining high adsorption performance
Solution Approach 2:
The patent uses the liquid solution itself as the medium for coating, eliminating the need for a separate binder intermediary, and the liquid serves both as the carrier and the coating material, applying uniformly without burying the adsorbent
4Ease of operation
If spraying is used to coat the adsorbent suspension, then easy application is achieved, but the spray nozzle may be blocked due to insufficient particle size control or high viscosity
Solution Approach 1:
The patent changes the material from powdered suspension to liquid solution, optimizing viscosity and particle size parameters to create a sprayable liquid that flows smoothly without clogging nozzles, enabling easy spray coating operation
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 high aldehyde gas adsorption performance, excellent processability, and long-term storage stability without precipitation or discoloration, enabling effective reduction of aldehyde gases in indoor environments without impairing the appearance of coated substrates.
Implementation Method 1
aldehyde gas adsorbents comprising an amine compound are known to be effective
Implementation Method 2
a dihydrazide compound is often used due to its large adsorption capacity
Implementation Method 3
mixing a dihydrazide compound with a metal oxide sol at specific ratios
Implementation Method 4
enhancing storage stability, allowing for efficient spray coating and maintaining appearance integrity
Implementation Method 5
efficient spray coating
Implementation Method 6
forming a uniform coating
Data Source
AI summary
To provide a transparent aldehyde-gas-adsorbing liquid that has high adsorption performance for an aldehyde gas and excellent processability and storage stability. To also provide an aldehyde-gas-adsorbing processed product such as a paper or a nonwoven fabric or fiber exhibiting excellent adsorption performance using the gas-adsorbing liquid.An aldehyde-gas-adsorbing liquid that contains a dihydrazide compound and a metal oxide sol, the content of the dihydrazide compound being 1.3 to 6 mass % relative to the total amount of gas-adsorbing liquid, and the total content of the dihydrazide compound and the metal oxide sol solids content being 18 to 45 mass % relative to the total amount of gas-adsorbing liquid.