Patterned Flexographic Printing Plate via Photopolymer Imprinting
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Solution Overview
Problem
Existing methods for imparting micro-sized patterns onto films are costly, require precise equipment control, and involve harsh solvents or separate web-handling apparatuses, making them inefficient and expensive.
Innovation Solution
An analog impression process where a flexible patterned substrate is pressed into an uncured soft photopolymer plate to create a patterned flexographic printing plate, which can be used to impart micro-sized patterns onto films without precise equipment control or a wash-out step, using commercially available materials and equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a rigid printing plate with etched or engraved relief is used, then micro-sized patterns can be imparted to films, but the cost becomes expensive
Solution Approach 1:
The patent uses a flexible patterned substrate as a master template that is pressed into uncured photopolymer material to create a printing plate. This copying process allows a simple, inexpensive substrate to generate a functional printing plate with micro-sized patterns, eliminating the need for expensive rigid engraved plates while maintaining pattern quality
Solution Approach 2:
The patent changes the physical state of the photopolymer material from uncured (soft and moldable) to cured (solid and durable) through photopolymerization. This parameter change allows the material to be easily formed during imprinting and then become a robust printing plate capable of thousands of cycles, reducing both initial cost and long-term expenses
2Manufacturing precision
If selective masking is used to make a polymer printing plate, then micro-sized patterns can be created, but precise equipment control and harsh solvents are required
Solution Approach 1:
The patent replaces the complex mechanical selective masking system with a simple mechanical imprinting process. Instead of using precise equipment to selectively deposit or remove material, a flexible substrate with pre-formed patterns is physically pressed into the photopolymer, transferring the pattern through direct contact. This eliminates the need for precise equipment control while maintaining pattern definition
Solution Approach 2:
The patent extracts and eliminates the wash-out step entirely from the manufacturing process. By using a flexible substrate that imprints patterns directly into uncured photopolymer, the method avoids the need for masking layers and subsequent solvent wash-out, removing both the equipment complexity and harsh chemical requirements
3Productivity
If a continuous roll of textured casting film is used, then micro-sized patterns can be applied to films, but a separate web-handling apparatus is required and rolls must be regularly replaced
Solution Approach 1:
The patent merges the pattern transfer function and the printing plate function into a single integrated component. The cured photopolymer plate serves both as the pattern source and as the durable printing surface that can be mounted on conventional flexographic equipment, eliminating the need for separate web-handling apparatus and roll replacement systems
Solution Approach 2:
The patent creates a printing plate with excessive durability, designed to last for thousands of printing cycles. This over-engineering of plate longevity eliminates the need for regular roll replacements and complex web-handling apparatus, as the single plate can be reused extensively without 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
This method allows for the economical and efficient creation of micro-sized patterns on films, providing optical, tactile, and functional effects, with the flexographic printing plate lasting for thousands of cycles and being inexpensive to produce and use.
Implementation Method 1
an uncured soft photopolymer plate to form a patterned flexographic printing plate
Data Source
AI summary
An analog method of making a patterned flexographic printing plate, the method comprising impressing a flexible patterned substrate into an uncured soft photopolymer plate to form the patterned flexographic printing plate.