Graphic Transfer Coating for Durable Leather Image Application
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Solution Overview
Problem
Existing methods for applying graphic images to substrates like leather are limited in achieving complex, high-resolution, multi-colored designs without compromising the material's texture or durability, often using hazardous inks and requiring excessive heat or pressure.
Innovation Solution
A method involving a carrier substrate coated with a water-based release layer, a top coat, and a print coat, where a mirror image of the graphic is printed and transferred to the substrate using modest heat and pressure, avoiding adhesives and silicone coatings, and utilizing aqueous inks for eco-friendly and durable results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesives or other materials are used to apply graphic images to substrates like leather, then the graphic image can be applied to the substrate, but the supple feel of the leather is compromised and the graphic is not protected from wear
Solution Approach 1:
The invention divides the coating system into multiple functional layers: a primer layer for adhesion to the substrate, a graphic layer containing the image, and a topcoat layer for protection. This segmentation allows each layer to perform its specific function without compromising the substrate's natural properties.
Solution Approach 2:
The invention uses composite coating materials consisting of multiple layers with different properties. The primer layer provides bonding, the graphic layer provides visual information, and the topcoat layer provides durability and wear resistance, creating a composite structure that achieves multiple objectives simultaneously.
2Ease of manufacture
If direct printing on substrate is used, then the process is simpler, but it is slow and expensive and the graphic image remains unprotected and is subject to damage from wear
Solution Approach 1:
The graphic image is printed onto a separate carrier film before being applied to the substrate. This preliminary action on the film allows for better control of the printing process and subsequent protection of the graphic through encapsulation between coating layers.
3Productivity
If inks containing hazardous ingredients are used for direct printing, then the printing process can be performed, but hazardous ingredients are used and the graphic image is unprotected
Solution Approach 1:
The invention introduces an intermediary carrier film that receives the printed graphic. This intermediary allows the use of standard printing inks on the film while the subsequent primer and topcoat layers on the substrate provide protection, eliminating the need for hazardous materials in the final application.
4Reliability
If excessive heat or pressure is used in the application process, then the graphic can be transferred to the substrate, but the intrinsic nature of the leather or other substrate is altered and the material is damaged
Solution Approach 1:
The invention modifies the parameters of the transfer process by using modest heat and pressure conditions that are sufficient to bond the primer layer to the substrate and encapsulate the graphic, but not so extreme as to damage the substrate's natural properties or alter its intrinsic nature.
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 the application of high-resolution, full-color graphics on luxury materials like leather without altering their texture or durability, providing protection against wear and tear while using environmentally friendly water-based inks and processes.
Implementation Method 1
A water-based release layer is applied to a carrier substrate and upon drying forms a first film
Implementation Method 2
transferred to the substrate using modest heat and pressure
Implementation Method 3
transferred to the substrate using modest heat and pressure
Data Source
AI summary
A method of applying a graphic image on a target substrate using a liquid release coat applied to a carrier substrate, the release coat formulated to form a durable contiguous first film, a top coat applied to the first film and formulated to form a durable contiguous second film, a print coat applied to the second film and formulated to form a durable contiguous third film, wherein a transferred graphic image or material is superimposed on the third film and transferred to the target substrate to which a primer coat has been applied, the primer coat being formulated to form a contiguous fourth film on the target substrate, the carrier substrate with the superimposed graphic image is thereafter united with the target substrate, thereby sandwiching the graphic image between the primer coat of the target substrate on the one hand and the top coat of the carrier substrate on the other hand.