Chlorinated Polymer Ink for Untreated Polypropylene Adhesion
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Solution Overview
Problem
Photopolymerizable inkjet inks containing polymer components face challenges with high viscosity, making it difficult to achieve close adhesiveness to substrates like polypropylene without surface treatment, and existing active-energy-ray-curable inks lack effective adhesiveness to untreated polypropylene substrates.
Innovation Solution
An active-energy-ray-curable composition comprising monofunctional (meth)acrylate, multifunctional (meth)acrylate, and chlorinated-olefin-structure-containing polymer, which are carefully selected for low viscosity, good solubility, and skin sensitization safety, to enhance inkjet ejectability and adhesiveness to polypropylene substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If polymer components are incorporated into photopolymerizable inkjet ink to ensure close adhesiveness to substrates, then adhesiveness is improved, but viscosity becomes high making it difficult to eject
Solution Approach 1:
The patent changes the chemical structure parameters of the polymer by introducing chlorinated olefin groups, which fundamentally alters the polymer's interaction with polypropylene substrates. This structural modification allows the polymer to achieve high adhesiveness to polypropylene without requiring high viscosity or surface treatment, thereby resolving the contradiction between adhesiveness and viscosity.
2Strength
If surface treatment such as corona discharge is applied to substrates having poor adhesiveness, then close adhesiveness is improved, but device complexity and operational restrictions increase
Solution Approach 1:
The patent extracts the surface treatment step from the overall process by incorporating the adhesion-promoting functionality directly into the ink composition through chlorinated-olefin-structure-containing polymer. This eliminates the need for separate corona discharge equipment and operational steps, resolving the contradiction between adhesiveness improvement and device complexity.
3Force
If monomer materials with low viscosity are used as base materials, then inkjet ejectability is improved, but close adhesiveness to polypropylene substrates becomes poor
Solution Approach 1:
The patent creates a composite ink formulation combining low-viscosity monomer base materials with chlorinated-olefin-structure-containing polymer. This composite approach allows the ink to maintain low viscosity for good ejectability while the chlorinated polymer component provides the necessary adhesion to polypropylene substrates, resolving the contradiction between viscosity and adhesiveness.
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 composition achieves low viscosity and excellent adhesiveness to polypropylene substrates without surface treatment, ensuring effective curing and inkjet performance while minimizing skin sensitization risks.
Implementation Method 1
active-energy-ray-curable composition
Data Source
AI summary
An active-energy-ray-curable composition including at least one monofunctional (meth)acrylate, at least one multifunctional (meth)acrylate, and at least one chlorinated-olefin-structure-containing polymer.