Liquid Toner Adhesion via Binder Additive Pre-treatment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid electrophotographic (LEP) printed images often fail to adhere well to substrates compared to traditional dry-toner processes, necessitating a method to enhance adhesion in LEP printing.
Innovation Solution
Treating substrates with a composition comprising a binder and a binder additive polymer produced from monomers like vinylpyrrolidone, oxazoline-containing monomers, N-vinyl piperidinone, N-vinylcaprolactam, and N,N-dimethyl acrylamide, followed by liquid electrophotographic printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If liquid electrophotographic printing is used instead of dry-toner printing, then printing speed and efficiency are improved, but adhesion of the printed image to the substrate deteriorates
Solution Approach 1:
The substrate is pre-treated with a composition containing binder and binder additive before liquid electrophotographic printing. This preliminary action modifies the substrate surface to enhance adhesion of the liquid toner, resolving the contradiction by preparing the surface in advance to receive the liquid ink effectively.
Solution Approach 2:
A binder additive comprising polymer produced from specific monomers (vinylpyrrolidone, oxazoline-containing monomer, N-vinyl piperidinone, vinylcaprolactam, N,N-dimethyl acrylamide) acts as an intermediary between the liquid toner and substrate. This intermediary substance improves the bonding interface, enabling liquid toner to adhere properly to the substrate while maintaining LEP printing advantages.
2Reliability
If a binder additive comprising polymer from specific monomers is applied to the substrate, then adhesion of liquid toner is significantly improved, but the complexity of the printing process increases
Solution Approach 1:
The substrate is pre-treated with a composition containing binder and binder additive before liquid electrophotographic printing. This preliminary action modifies the substrate surface to enhance adhesion of the liquid toner, resolving the contradiction by preparing the surface in advance to receive the liquid ink effectively.
Solution Approach 2:
The invention specifies particular monomer types and their ratios in the binder additive polymer to optimize adhesion properties. By controlling the chemical composition parameters (monomer selection, molecular weight, ratio ranges), the process achieves high adhesion while maintaining manageable complexity through defined material specifications.
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
Significantly improves the adhesion of liquid toner to substrates, with adhesion levels exceeding 80% as measured by the Tape Pull Test, enhancing print quality and durability.
Implementation Method 1
enhancing adhesion of liquid toner printed on a substrate
Data Source
AI summary
A method of improving the adhesion of a liquid ink to a substrate where the ink is applied to the substrate using an LEP printing process, and products therefrom.