Nylon-11 Powder for Layer-by-Layer Manufacturing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional polymer powders for layer-by-layer manufacturing processes face challenges with curl distortion, limited processing latitude, and poor recycling capabilities due to high BET surface area and melting point requirements, which affect surface quality and dimensional accuracy.
Innovation Solution
A polymer powder based on nylon-11, prepared via polycondensation of ω-aminoundecanoic acid, with a specific enthalpy of fusion, recrystallization temperature, and BET surface area, allowing for selective melting and improved processing properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional polymer powders with high BET surface area are used, then melting point requirements can be met, but curl distortion increases and processing latitude decreases
Solution Approach 1:
The patent changes the material parameter from conventional polymers to nylon-11, which fundamentally alters the melting behavior and thermal properties. This parameter change enables lower processing temperatures while maintaining dimensional stability, thereby reducing curl distortion and improving manufacturing precision without sacrificing melting point requirements
2Temperature
If conventional polymer powders are used, then melting can be achieved, but recycling capabilities deteriorate due to high BET surface area
Solution Approach 1:
The patent changes the material composition to nylon-11 with specifically controlled BET surface area below 6 m²/g. This parameter change enables the powder to withstand repeated heating and cooling cycles without degradation, thereby improving recycling capability while maintaining adequate melting temperature for processing
3Manufacturing precision
If higher enthalpy of fusion is used, then selective melting sharpness improves, but heat conduction increases causing contour deviation
Solution Approach 1:
The patent changes to nylon-11 material with optimized enthalpy of fusion that balances selective melting capability with reduced heat conduction. This parameter change allows for sharp melting zones without excessive heat spread, thereby maintaining both melting selectivity and contour accuracy
4Productivity
If standard grain sizes are maintained, then processing efficiency is preserved, but surface quality deteriorates due to curl distortion
Solution Approach 1:
The patent changes the material properties of nylon-11 to reduce curl distortion while maintaining standard grain sizes. This parameter change eliminates the need for finer particles to achieve good surface quality, thereby preserving processing efficiency while improving surface quality through reduced distortion
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 nylon-11 powder enhances surface quality, dimensional accuracy, and recycling capabilities while maintaining standard grain sizes, offering greater processing latitude and reduced curl distortion.
Implementation Method 1
a layer-by-layer process which selectively melts regions of the respective pulverulent layer
Implementation Method 2
the powder bed surrounding the molten regions provides adequate support
Implementation Method 3
The molten particles coalesce and rapidly solidify again to give a solid mass
Implementation Method 4
The introduction of energy is achieved by way of electromagnetic radiation
Implementation Method 5
After cooling and hardening of the regions previously subjected to layer-by-layer melting
Data Source
AI summary
The present invention relates to a polymer powder which comprises nylon-11, and to the use of this powder for shaping processes, and also to moldings produced from this polymer powder.The shaping processes are layer-by-layer processes which use powders, where regions of the respective layer are selectively melted via introduction of electromagnetic energy. The selectivity may—with no intention of restricting the invention thereto—be achieved via masks, application of inhibitors, of absorbers, or of susceptors, or via focusing of the energy introduced. After cooling, the regions then solidified can be removed in the form of moldings from the powder bed.Compared with moldings composed of conventional powders, the moldings constructed using the inventive powder by one of the inventive processes exhibit marked advantages in terms of component properties, particularly surface finish. There are also improvements here in processing and in recycling capability when comparison is made with conventional polyamide powders.