Pattern-Printed Sheet Gravure Printing Ink Control
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Solution Overview
Problem
Existing pattern-printed sheets face challenges in achieving high reading precision and production efficiency, particularly with gravure printing methods, which struggle to maintain dot pattern readability and reproducibility in small dot sizes and often result in ink spreading at the edges.
Innovation Solution
A pattern-printed sheet is developed with an optically readable region and an optically unreadable region, using a gravure printing method that employs a precoat layer with titanium oxide and specific resin compositions, along with a primer and surface protective layers, to enhance dot pattern readability and prevent ink spreading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If gravure printing method is used to achieve high production efficiency, then productivity is improved, but manufacturing precision of dot pattern edges deteriorates due to ink spreading
Solution Approach 1:
A precoat layer is applied to the substrate before the actual dot pattern printing. This precoat layer serves as a preparatory surface that controls ink behavior during gravure printing, preventing ink spreading at the edges of dots while maintaining high production efficiency. The precoat layer is formed with specific resin compositions and titanium oxide to optimize ink reception and edge definition.
Solution Approach 2:
The precoat layer acts as an intermediary between the substrate and the dot pattern ink. It mediates the interaction by providing a controlled surface that receives the ink in a way that prevents unwanted spreading, thereby improving edge reproducibility without sacrificing the productivity benefits of gravure printing.
2Measurement precision
If small dot sizes are used to improve reading precision, then measurement precision is improved, but manufacturing precision deteriorates due to difficulty in maintaining edge definition
Solution Approach 1:
The precoat layer is applied beforehand to create an optimized surface for small dot printing. This preparatory layer ensures that even when printing small dots (80-130 μm), the ink maintains sharp edges without spreading, enabling both high reading precision and manufacturing precision to be achieved simultaneously.
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 achieves high reading precision in dot sizes between 80 to 130 μm and improves reproducibility of the dot pattern edges, while also allowing for use as both a projection screen and a whiteboard with enhanced mark-erasing ability.
Implementation Method 1
a precoat layer laminated on a substrate, in which a dot pattern is printed
Implementation Method 2
a transparent sheet printed with a dot pattern which is capable of providing location information to show the location of an input trajectory by an electronic input pen
Implementation Method 3
an ink emitting the light that can be read by irradiating a light having a prescribed wavelength
Implementation Method 4
a surface protective layer; and the 60° gloss value is in the range of 8 to 20
Data Source
AI summary
Provided by the present inventions are a pattern-printed sheet and a method for manufacturing this, wherein the pattern-printed sheet is characterized that on a precoat layer laminated on a substrate are formed an optically readable region in which a dot pattern optically readable by an input terminal is printed and an optically unreadable region in which a dot pattern optically unreadable by an input terminal is printed, and the dot pattern formed in the optically unreadable region is a halftone tint having regularity whose halftone dot concentration is in the range of 10 to 30%. This pattern-printed sheet not only can be obtained by using a gravure printing method having outstanding production efficiency but also has a dot pattern readable with high reading precision in a prescribed dot size.