Metallic Ink Jet Printing System for Graphics Applications
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Solution Overview
Problem
Current manufacturing methods for creating metallic or gold foil-like effects on various substrates are costly, inflexible, and inefficient, particularly due to excessive waste and poor adhesion on rough surfaces, limiting the ability to achieve high-quality, customized printing with short production runs.
Innovation Solution
A multi-phase ink jet system comprising a first ink jet ink with reflective metallic particles and a second ink jet ink with a crosslinkable polymer, optionally using an undercoat layer to create a smooth surface for effective adhesion and a protective coating, allowing for metallic effects on non-metallic substrates with improved flexibility and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If thermal transfer techniques using colored foils and ribbons are used to create metallic effects, then metallic appearance can be achieved, but excessive waste of colored foil or ribbons occurs and adhesion on rough surfaces is poor
Solution Approach 1:
The patent replaces the mechanical thermal transfer process with an inkjet printing system that deposits metallic particles directly onto the substrate. This substitution eliminates the need for physical foil or ribbon materials, allowing precise digital deposition only where metallic effect is required, thereby eliminating excessive material waste while maintaining the desired metallic appearance.
Solution Approach 2:
The invention changes the state of metallic material from solid foil/ribbon form to liquid ink suspension containing metallic particles. This parameter change allows the metallic material to be delivered through inkjet nozzles as a controllable liquid stream, enabling precise deposition and eliminating waste associated with traditional thermal transfer methods.
2Illumination intensity
If thermal transfer techniques using colored foils and ribbons are used to create metallic effects, then metallic appearance can be achieved, but adhesion on rough surfaces is poor
Solution Approach 1:
The invention changes the physical state of metallic material from solid foil to liquid ink suspension, allowing it to flow and conform to rough surface topography. The liquid ink can penetrate and adhere to irregular surfaces, then solidify to create a durable metallic effect that maintains reliable adhesion on rough substrates.
Solution Approach 2:
The patent introduces a liquid carrier medium as an intermediary between the metallic particles and the rough substrate surface. This liquid medium facilitates uniform distribution and adhesion of metallic particles to irregular surfaces, solving the adhesion problem that plagues direct foil transfer methods on rough textures.
3Illumination intensity
If current manufacturing methods are used for metallic effects, then metallic appearance can be achieved, but flexibility for customized printing and short production runs is limited
Solution Approach 1:
The inkjet printing system serves multiple functions: it can print metallic effects, change production volumes on demand, accommodate customized designs, and work with various substrates. This universal system replaces dedicated thermal transfer equipment, providing flexibility for short runs and customization while maintaining metallic appearance quality.
Solution Approach 2:
The invention introduces dynamic control over production parameters including print quantity, design variation, and substrate type. The digital inkjet system allows real-time adjustment of metallic effect applications, enabling flexible response to customized printing needs and short production runs that were not feasible with static thermal transfer methods.
4Illumination intensity
If current manufacturing methods are used for metallic effects, then metallic appearance can be achieved, but production efficiency is low
Solution Approach 1:
The patent replaces slow, manual thermal transfer processes with automated inkjet printing technology. The inkjet system can rapidly deposit metallic particles across large areas without the time-consuming steps of foil application, heating, and trimming, thereby significantly improving production efficiency while maintaining metallic appearance quality.
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
Enables economical and flexible printing of metallic effects on diverse substrates, including rough surfaces, with reduced waste and enhanced durability, supporting customized and high-quality prints with embossed appearances.
Implementation Method 1
a first ink jet ink is applied onto a substrate to form a reflective coating layer. The first ink jet ink preferably comprises a dispersion of reflective metallic particles
Implementation Method 2
A second ink jet ink is then applied over the reflective coating layer to form a protective coating layer. In various embodiments, the second ink jet ink comprises at least one crosslinkable polymer.
Data Source
AI summary
A multi-phase system for creating a metallic effect on a substrate, including applying to the substrate a first ink jet ink including a dispersion of reflective metallic particles in a suitable carrier system, to form a reflective coating layer; and applying a second ink jet ink over the reflective coating layer to form a protective coating layer. Optionally, an undercoat layer is printed on the substrate prior to applying the first ink jet ink. The second ink jet includes at least one crosslinkable polymer or is otherwise energy curable. The second ink jet ink optionally imparts a color to the metallic image.