Paper Coating Composition for UV Ink Anchorage and Low Residuals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current UV curable coatings for paper struggle with bonding efficiency and processing speed, often leaving residual monomers and photoinitiators that pose environmental and health risks, particularly in packaging and healthcare applications.
Innovation Solution
A coating composition for paper that includes a radically polymerizable agent with reactive ethylenically unsaturated groups, such as vinyl monomers, in a matrix that minimizes residual monomers and photoinitiators, enhancing bonding and processing speed while being environmentally friendly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If UV curable coating compositions are used to promote printability and bonding, then ink anchorage is improved, but residual monomers, oligomers, and photoinitiators remain that pose environmental and health risks
Solution Approach 1:
The patent extracts and removes harmful residual components (monomers, oligomers, photoinitiators) from the coating system by using pre-polymerized polymers with reactive groups that can form bonds without leaving harmful residues, thus maintaining ink anchorage while eliminating environmental and health risks
Solution Approach 2:
The patent changes the chemical parameters of the coating composition by using polymers with specific reactive groups (isocyanate, carboxyl, hydroxyl, amino) instead of traditional UV curable monomers and oligomers, fundamentally altering the curing mechanism to avoid harmful residuals while maintaining bonding strength
2Strength
If longer reaction and curing times are allowed to improve bonding between ink and paper surface, then ink anchorage is improved, but process throughput decreases and costs increase
Solution Approach 1:
The patent applies preliminary action by pre-synthesizing polymers with specific reactive groups before application, so that the coating composition is ready to bond immediately upon contact with the ink or paper surface, eliminating the need for extended curing times and maintaining high production throughput
Solution Approach 2:
The patent uses polymers with reactive groups as intermediaries between the coating and the ink/paper surface, enabling rapid bond formation through chemical affinity without requiring prolonged reaction times, thus resolving the conflict between bonding strength and production speed
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 significantly improves ink anchorage and processing speed, reducing environmental and health hazards by minimizing residual monomers and photoinitiators, making it suitable for eco-friendly packaging and healthcare applications.
Implementation Method 1
The at least one agent (i) includes at least one reactive ethylenically unsaturated group, and (ii) is radically polymerizable
Data Source
Figure 1~2
Figure 3
AI summary
Paper coatings, coated papers, and printed coated papers are described. The coatings promote adhesion and retention of UV curable printing media such as UV curable inks. Also described are systems and processes for forming the coated papers and printed coated papers.