Coated Building Boards with Zeolite Ink Layer
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Solution Overview
Problem
Water-based inks used for inkjet printing on decorative building boards face challenges such as penetration into porous materials and spreading on non-porous surfaces, leading to low image quality, resolution, and color strength due to difficulty in curing and ink bleeding.
Innovation Solution
A color imaging layer comprising a microporous molecular sieve is applied to the building boards, using an aqueous coating composition with an acrylic emulsion and a molecular sieve, which effectively adsorbs water and retards the penetration of ink, enhancing image resolution and color strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If water-based ink is applied to porous building boards, then the base material can be printed, but the ink penetrates into the base material leading to low color strength and color bleeding
Solution Approach 1:
An ink receiving layer is introduced as an intermediary between the water-based ink and the porous building board. This layer prevents direct penetration of ink into the base material while still allowing ink application, thereby maintaining color strength and preventing color bleeding that would otherwise occur with porous substrates
Solution Approach 2:
The ink receiving layer utilizes a porous structure with controlled pore size to selectively interact with water-based ink. The porosity allows the layer to absorb and retain ink while preventing excessive penetration, thus preserving image resolution and color strength without requiring the base material to be non-porous
2Manufacturing precision
If water-based ink is applied to non-porous building boards, then the base material can be printed, but the ink spreads on the surface leading to low image quality
Solution Approach 1:
The ink receiving layer provides a porous surface that allows water-based ink to be absorbed and retained rather than spreading across a non-porous surface. This controlled absorption maintains image resolution while preventing the ink from pooling or spreading, thereby preserving both image quality and color strength
3Quantity of substance
If conventional ink receiving layers are used to prevent ink penetration, then color strength is improved, but the layers degrade in strength
Solution Approach 1:
The ink receiving layer is formulated as a composite material combining binding agents, fillers, and optional reinforcing fibers. This composite structure provides both the necessary porosity for ink reception and sufficient mechanical strength to prevent layer degradation, simultaneously achieving color strength and structural integrity
Solution Approach 2:
The ink receiving layer exhibits local quality variations with different pore sizes and densities in different regions. This allows the layer to provide strong ink retention in areas requiring high color strength while maintaining overall structural strength through reinforced regions, preventing both ink penetration and layer degradation
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 use of a microporous molecular sieve in the color imaging layer significantly reduces ink penetration, improves image resolution, and prevents color bleeding, resulting in high-quality, stable printed patterns with water-based inks.
Implementation Method 1
a molecular sieve, which effectively adsorbs water and retards the penetration of ink
Data Source
AI summary
The invention relates to a coated building board comprising a colour imaging layer for water-based ink and a method for the preparation of the coated building boards. The invention relates particularly to coated building boards, wherein the colour imaging layer contains a molecular sieve, particularly a microporous zeolite.