Light Curing Ink Set Surface Tension Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional light curing molding methods using an ink-jet scheme face issues with reduced dimensional accuracy due to bleeding at the interface between the resin composition for the modeling material and the supporting material, which affects the precision of the light cured articles.
Innovation Solution
A light curing molding ink set is developed with a resin composition for the modeling material having a higher surface tension than the resin composition for the supporting material, where the surface tension difference satisfies the condition 0 < Mt - St < 5, to minimize bleeding and enhance dimensional accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a roller is used to smooth the upper surface of the resin composition layer by removing extra resin composition, then the surface smoothness is improved, but the dimensional accuracy deteriorates due to bleeding at the interface between modeling material and supporting material
Solution Approach 1:
The patent applies parameter changes by adjusting the surface tension of the resin compositions. Specifically, it sets the surface tension of the modeling material resin (Mt) to be higher than that of the supporting material resin (St), with the difference satisfying 0 < Mt - St < 5 mN/m. This parameter optimization prevents bleeding at the interface while still allowing the roller to smooth the surface effectively, thereby resolving the contradiction between surface smoothness and dimensional accuracy.
2Manufacturing precision
If the surface tension difference between modeling material resin and supporting material resin is increased to prevent bleeding, then the dimensional accuracy is improved, but the interface stability deteriorates
Solution Approach 1:
The patent optimizes the surface tension parameter by establishing that Mt > St with 0 < Mt - St < 5 mN/m. This controlled parameter relationship creates a surface tension gradient that prevents capillary bleeding while maintaining interface stability through proper wetting relationships. The specific numerical range ensures that the interface remains stable during the curing process while still achieving high dimensional accuracy by preventing resin migration.
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 ink set achieves improved dimensional accuracy in light cured articles by suppressing bleeding at the interface, ensuring precise shaping and manufacturing of complex structures.
Implementation Method 1
a shaping method using a photocurable resin composition which cures by irradiating ultraviolet rays or the like has widely been known
Implementation Method 2
surface tension Mt (mN/m) of the resin composition for a modeling material is greater than surface tension St (mN/m) of the resin composition for a supporting material, and the surface tension Mt and the surface tension St satisfy the following (i) expression: 0 < Mt−St < 5
Data Source
AI summary
There is provided a light curing molding ink set used for a manufacturing method for light curing molding using an ink-jet scheme, comprising a combination of a resin composition for a modeling material used for shaping the modeling material and a resin composition for a supporting material used for shaping the supporting material, wherein surface tension Mt (mN/m) of the resin composition for a modeling material is greater than surface tension St (mN/m) of the resin composition for a supporting material, and the surface tension Mt and the surface tension St satisfy the [0<Mt −St<5] expression, and this light curing molding ink set can afford a light cured article having the good dimensional accuracy.