Multilayer Printing Paper Pore Structure for Gloss Ghosting
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Solution Overview
Problem
Printing paper using synthetic resin film experiences gloss ghosting when printed materials are stacked, leading to deterioration in coloring performance due to solvent infiltration and volatilization issues.
Innovation Solution
A multilayer printing paper structure with specific pore size ranges in each layer (surface, intermediate, and base layers) and filler content to facilitate solvent infiltration and retention, reducing gloss ghosting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If synthetic resin film is used as printing paper, then productivity and durability are improved, but gloss ghosting occurs due to solvent infiltration issues
Solution Approach 1:
The synthetic resin film is divided into multiple layers (surface layer, intermediate layer, base layer) with progressively larger pore sizes. This segmentation allows different layers to perform different functions: the surface layer controls ink reception, the intermediate layer manages solvent distribution, and the base layer provides structural support while allowing vapor escape, thereby preventing gloss ghosting while maintaining productivity
Solution Approach 2:
Each layer is given different local properties through controlled pore size variations. The surface layer has smaller pores (0.5-5 μm) for precise ink absorption, the intermediate layer has medium pores (5-20 μm) for solvent distribution, and the base layer has larger pores (20-50 μm) for structural integrity and vapor permeation. This local differentiation resolves the contradiction between productivity and gloss ghosting prevention
2Duration of action of moving object
If pore size is increased to facilitate solvent infiltration, then ink dryability is improved, but coloring performance deteriorates
Solution Approach 1:
The solution moves from a single-dimensional pore size parameter to a multi-dimensional layered structure. By distributing pore size variations across three layers (surface: 0.5-5 μm, intermediate: 5-20 μm, base: 20-50 μm), the system achieves both rapid solvent infiltration (improving dryability) and precise ink containment (maintaining coloring performance) simultaneously
3Object-generated harmful factors
If multilayer structure with specific pore sizes is implemented, then gloss ghosting is reduced, but device complexity increases
Solution Approach 1:
The invention uses porous thermoplastic resin materials with controlled pore sizes in each layer. This approach prevents gloss ghosting through the natural capillary action and vapor permeation properties of porous materials, avoiding the need for complex coatings or treatments while maintaining a relatively simple multilayer structure that can be manufactured using conventional lamination techniques
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 multilayer structure effectively reduces gloss ghosting by quickly infiltrating and retaining solvents, enhancing ink dryability and preventing color performance deterioration in stacked printed materials.
Implementation Method 1
the base layer, the intermediate layer, and the surface layer each being a thermoplastic resin film having pores
Implementation Method 2
an average pore size of the surface layer being from 0.2 to 5 μm, an average pore size of the intermediate layer being from 5 to 70 μm and being greater than the average pore size of the surface layer, and an average pore size of the base layer being from 70 to 200 μm and being greater than the average pore size of the intermediate layer
Data Source
AI summary
A printing paper having a base layer, an intermediate layer, and a surface layer, the intermediate layer being arranged adjacent to the base layer and on the base layer, and the surface layer being arranged adjacent to the intermediate layer and on the intermediate layer, the base layer, the intermediate layer, and the surface layer each being a thermoplastic resin film having pores, an average pore size of the surface layer being from 0.2 to 5 μm, an average pore size of the intermediate layer being from 5 to 70 μm and being greater than the average pore size of the surface layer, and an average pore size of the base layer being from 70 to 200 μm and being greater than the average pore size of the intermediate layer.