Resin Composition Surface Tension Control for Inkjet 3D Printing Accuracy
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Solution Overview
Problem
Conventional light curing molding using an ink-jet scheme for creating stereoscopically shaped products faces issues with reduced dimensional accuracy due to bleeding at the interface between the resin composition for the modeling material and the supporting material.
Innovation Solution
A resin composition for the modeling material is developed, comprising an ethylenic unsaturated monomer, a photopolymerization initiator, and a surface adjusting agent, with a surface tension range of 26.0 to 33.0 mN/m, which suppresses bleeding at the interface when combined with a resin composition for the supporting material, thereby maintaining dimensional accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a resin composition for modeling material and a resin composition for supporting material are used in combination to shape complicated structures, then the ability to support modeling material is improved, but dimensional accuracy deteriorates due to bleeding at the interface
Solution Approach 1:
The patent applies parameter changes by carefully controlling the surface tension of the resin composition for modeling material within the range of 20.0 to 30.0 mN/m. This parameter optimization prevents excessive spreading and bleeding at the interface between modeling material and supporting material, thereby maintaining dimensional accuracy while enabling the shaping of complicated structures including hollow shapes
Solution Approach 2:
The patent uses composite materials by combining specific components including ethylenic unsaturated monomers, oligomers, and photopolymerization initiators in the resin composition. This composite formulation achieves the desired surface tension range while maintaining proper curing characteristics and interfacial compatibility, resolving the contradiction between structural complexity and dimensional accuracy
2Manufacturing precision
If the surface tension of resin composition is reduced to prevent bleeding, then dimensional accuracy is improved, but the ability to support modeling material may deteriorate
Solution Approach 1:
The patent optimizes the surface tension parameter within the specific range of 20.0 to 30.0 mN/m, which is low enough to prevent bleeding and improve dimensional accuracy, yet high enough to maintain proper adhesion and support capability for modeling material. This precise parameter control resolves the contradiction between preventing bleeding and maintaining support ability
Solution Approach 2:
The resin composition uses a composite formulation containing ethylenic unsaturated monomers (such as acrylates and methacrylates), oligomers, and photopolymerization initiators. This composite structure achieves the optimized surface tension range while preserving the necessary adhesive properties to support complicated modeling structures
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 effectively prevents bleeding at the interface, resulting in a light cured article with improved dimensional accuracy, suitable for use in ink-jet based light curing molding processes.
Implementation Method 1
a shaping method using a photocurable resin composition which cures by irradiating ultraviolet rays or the like
Implementation Method 2
the resin composition for a modeling material has surface tension Mt of 26.0 to 33.0 mN/m
Data Source
AI summary
There is provided a resin composition for a modeling material, used for shaping a modeling material by a manufacturing method for light curing molding using an ink-jet scheme, comprising (A) an ethylenic unsaturated monomer as a photocuring component, (B) a photopolymerization initiator, and (C) a surface adjusting agent, wherein the resin composition for a modeling material has surface tension Mt of 26.0 to 33.0 mN/m, and the resin composition for a modeling material has surface tension Mst represented by the following (i) expression of 33.0 mN/m or more, and this resin composition for a modeling material 4a can afford a light cured article having the good dimensional accuracy.