Calendered Printing Substrate Resin Composition for Decorative Panels
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Solution Overview
Problem
Direct printing on decorative panels faces challenges due to adhesion issues caused by resin penetration through paper or non-woven fabric layers, leading to poor ink settlement and stability problems in the laminate, and the use of barrier or ink-receiving layers can exacerbate these issues.
Innovation Solution
A method involving a calendered printing substrate with a resin composition containing 0.5-85 wt.% of solid materials like titanium dioxide or cellulose fibers, applied after calendering, which penetrates into the paper or non-woven fabric layer, enhancing adhesion and stability, and eliminating the need for a backing layer by preventing cupping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a paper or non-woven fabric layer is applied onto the carrier plate to enable direct printing, then the printing substrate is provided, but the resin penetrates through the layer causing poor ink settlement and adhesion issues
Solution Approach 1:
The patent changes the physical and chemical parameters of the paper or non-woven fabric layer by treating it with a sizing agent or applying a specific resin composition with controlled molecular weight and functional groups. This modification adjusts the penetration resistance and surface energy of the substrate, enabling both resin penetration for bonding and ink adhesion for printing quality.
Solution Approach 2:
The patent uses a composite structure consisting of the carrier plate, the treated paper or non-woven fabric layer, and a specifically formulated resin composition. The composite material system is designed so that the resin contains both penetrating components (low molecular weight) and bonding components (high molecular weight with adhesion promoters), achieving simultaneous penetration through the substrate and formation of a stable printing surface.
2Stability of the object's composition
If a backing layer is applied onto the carrier plate to prevent cupping deformation, then the structural stability is improved, but the production process becomes more complex and costly
Solution Approach 1:
The patent makes the paper or non-woven fabric layer multi-functional by treating it with a sizing agent or selecting specific resin compositions that simultaneously provide both structural support (preventing cupping) and printing substrate functionality. This eliminates the need for a separate backing layer, as the treated layer performs both the mechanical support function and the printing substrate function.
Solution Approach 2:
The patent merges the functions of the printing substrate and the backing layer into a single integrated layer. The paper or non-woven fabric layer, when treated with the specific resin composition, combines the properties of a printing-receptive surface with the mechanical strength needed to prevent cupping deformation, thereby reducing the total number of layers and simplifying the manufacturing process.
3Reliability
If barrier layers or ink-receiving layers are applied to prevent resin penetration, then ink adhesion is improved, but the laminate stability and adhesion problems persist
Solution Approach 1:
Instead of adding barrier layers, the patent changes the parameters of the resin composition itself by controlling its molecular weight distribution, viscosity, and chemical functionality. The resin is formulated to have optimal penetration depth and bonding strength, achieving both ink adhesion and laminate stability through parameter optimization rather than additional layers.
Solution Approach 2:
The patent introduces a sizing agent or specific resin composition as an intermediary substance between the carrier plate and the printing ink. This intermediary layer controls the interaction between resin and substrate, allowing sufficient resin penetration for bonding while maintaining a stable surface for ink adhesion, without requiring separate barrier or ink-receiving layers.
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 method provides a stable laminate with excellent adherence for both printing and top layers, eliminating the need for a backing layer and reducing production costs and material usage while maintaining the natural appearance of the decorative panel.
Implementation Method 1
a resin composition is applied which penetrates into the paper or non-woven fabric layer at least partially
Implementation Method 2
calendering the laminate structure obtained at a temperature between ≥40° C. and ≤250° C.
Data Source
AI summary
Method for producing a printing substrate for direct printing onto a decorative panel, comprising the steps of providing a plate-shaped carrier; applying a resin layer onto the plate-shaped carrier; applying a paper or non-woven fabric layer onto the plate-shaped carrier; and calendering the resulting layered structure at a temperature between ≥40° C. and ≤250° C.; wherein after the calendering process a resin composition is applied, which comprises between ≥0.5 wt.-% and ≤85 wt.-% of a solid material having a mean grain diameter d50 between ≥0.1 μm and ≤120 μm.