Propylene Powder 3D Printing Composition for Stronger Layer Fusion
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Solution Overview
Problem
Existing 3D printing technologies face challenges in efficiently fusing and coalescing polymer build materials to form high-quality three-dimensional parts, particularly in terms of material cohesion and structural integrity.
Innovation Solution
A three-dimensional printing composition comprising a thermoplastic polymer powder with a multi-stage polymerized propylene-based copolymer, antioxidants, flow aids, surface modifying agents, antistatic agents, and fillers, along with a fusing agent using an infrared absorbing compound to selectively fuse and coalesce polymer layers under radiation exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional 3D printing methods use chemical binders or adhesives to bind build materials together, then material bonding is achieved, but material cohesion and structural integrity are insufficient
Solution Approach 1:
The patent replaces chemical binding mechanisms with thermal energy-based fusion. The fusing agent absorbs infrared radiation and converts it to thermal energy, which directly melts and fuses the polymer build material particles together, eliminating the need for chemical binders and achieving superior material cohesion through thermal welding of polymer chains.
Solution Approach 2:
The patent changes the bonding mechanism from chemical to thermal by introducing a fusing agent that absorbs infrared radiation. This parameter change enables direct thermal fusion of polymer particles, transforming the bonding process from adhesive-based to heat-based, thereby improving structural integrity and material cohesion.
2Strength
If heat-assisted extrusion is used to melt build material, then material fusion is achieved, but energy efficiency and precision control are reduced
Solution Approach 1:
The patent introduces a fusing agent as an intermediary substance that selectively absorbs infrared radiation and converts it to thermal energy at the build material interface. This intermediary enables precise localized heating only where needed for fusion, dramatically improving energy efficiency compared to bulk heat-assisted extrusion methods that heat entire material volumes.
Solution Approach 2:
The fusing agent enables localized thermal fusion by absorbing infrared radiation only in specific patterned regions where build material needs to be bonded. This local quality approach ensures energy is applied precisely where required rather than heating entire material volumes, improving both energy efficiency and fusion precision.
3Shape
If successive layers of material are applied in additive processes, then three-dimensional parts are formed, but layer adhesion and structural homogeneity are compromised
Solution Approach 1:
The patent ensures continuous thermal fusion action between successive layers by applying the fusing agent and infrared radiation at each layer interface. This continuous thermal bonding process creates homogeneous structural integrity throughout the entire three-dimensional part, eliminating weak interfaces between layers and ensuring uniform material properties throughout the build.
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 enhances the fusion and coalescence of polymer layers, resulting in three-dimensional parts with improved tensile strength and structural integrity, suitable for applications such as automobile parts and packaging containers.
Implementation Method 1
the fusing agent comprises at least one infrared absorbing compound
Implementation Method 2
exposing the build material composition to radiation to fuse the at least the portion to form a layer of a 3D part
Implementation Method 3
the fusing agent is capable of at least partially penetrating into voids between the polymer build material particles, and is also capable of spreading onto the exterior surface of the polymeric build material particles
Implementation Method 4
at least partial melting may be accomplished using heat-assisted extrusion
Implementation Method 5
Other 3D printing methods involve at least partial curing, thermal merging/fusing, melting, sintering, etc. of the build material
Data Source
Figure 1~2
Figure 3A~3C
Figure 3D~3E
AI summary
This disclosure describes compositions, kits, methods, systems, and three- dimensional parts. According to an example, described herein is a threedimensional printing composition comprising: a polymeric powder build material comprising a thermoplastic polymer powder composition, wherein the thermoplastic polymer powder composition comprises: (a) at least 50 wt% of a C3 polyolefin, or a mixture of two or more polyolefins including at least 60 wt% of a C3 polyolefin based on the total weight of the mixture of the two or more polyolefins, (b) 0.1 to 1 wt% antioxidants, (c) 0.1 to 5 wt% flow aids, (d) 0-10 wt% of a surface modifying agent, (e) 0.05-wt%-10 wt% antistatic agents, (f) 2 wt% to 40 wt% filler, wherein the total of (a) to (f) is 100 wt%.