Phase-Change 3D Printing Inks for Tunable Modulus and Reduced Curing
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Solution Overview
Problem
Current three-dimensional printing technologies are limited by the use of expensive materials and processes that result in objects with high costs, ridges, and lack of material variety, particularly for achieving a range of room temperature modulus values and reducing the number of curing steps required.
Innovation Solution
The development of radiation curable phase-change inks comprising a monomer, photoinitiator, wax, and gellant, which can be deposited and cured to achieve a range of room temperature moduli from 0.01 to 5 GPa, allowing for the creation of objects with varying properties and reducing the number of curing steps needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional stereolithography or rapid prototyping methods are used, then three-dimensional objects can be produced, but the material selection is limited and the cost is high
Solution Approach 1:
The patent changes the material parameters by using phase-change inks that transition from liquid to solid upon cooling, rather than traditional photopolymers or thermoplastics. This enables a wide range of room temperature moduli (0.01 to 5 GPa) to be achieved by adjusting composition ratios, providing versatile material selection at lower cost
Solution Approach 2:
The invention uses composite ink compositions combining multiple components (monomer, photoinitiator, wax, gellant) that work together to achieve desired mechanical properties. The composite nature allows tuning of room temperature modulus while maintaining ease of manufacture through a single deposition and curing process
2Strength
If rigid materials like ABS plastic are used for rapid prototyping, then structural strength is achieved, but ridges form on the finished object requiring post-printing treatment
Solution Approach 1:
The patent changes the material state from rigid thermosetting resins to phase-change inks that solidify through controlled cooling. This parameter change eliminates the ridge formation problem while maintaining structural strength, as the phase-change mechanism allows uniform solidification without the rapid cooling issues of traditional ABS printing
Solution Approach 2:
The invention utilizes phase transition (liquid to solid) of the ink composition upon cooling to achieve object formation. This phase-change mechanism inherently produces smooth surfaces without ridges, eliminating the need for post-printing sanding or polishing while maintaining structural integrity
3Adaptability or versatility
If multiple curing steps are used between deposition steps, then material properties can be controlled, but production time and energy requirements increase
Solution Approach 1:
The patent merges the curing step with the deposition process by using phase-change inks that cure automatically upon cooling during the printing process itself. This eliminates the need for separate curing steps between deposition operations, significantly improving production speed while still allowing control of material properties through composition design
Solution Approach 2:
The phase-change ink composition performs its own curing function through the natural cooling process during deposition. The material self-cures without requiring external energy input for separate curing steps, thereby reducing energy requirements and increasing productivity while maintaining material property control through compositional parameters
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
This solution enables the production of three-dimensional objects with a range of mechanical properties, reducing production costs and time by using a broader material set and minimizing the number of curing steps, while maintaining mechanical stability.
Implementation Method 1
a radiation curable monomer, a photoinitiator, a wax and a gellant
Implementation Method 2
the composition of the printed and cured object has a room temperature modulus of less than about 0.01 to about 5 GPa
Data Source
AI summary
Curable, phase-change compositions and inks used for printing three-dimensional objects including a curable monomer, a photoinitiator, a wax and a gellant, where the composition of the cured formulation has a room temperature modulus of from about 0.01 to about 5 Gpa. The curable monomer includes acrylic monomer, polybutadiene adducted with maleic anhydride, aliphatic urethane acrylate, polyester acrylate, 3-acryloxypropyltrimethoxysilane, or acryloxypropyl t-structured siloxane.