(564c) The Influence of Temperature and Moisture on Polymer and Metal Materials for Additive Manufacturing
AIChE Annual Meeting
2020
2020 Virtual AIChE Annual Meeting
Particle Technology Forum
3D Printing
Friday, November 20, 2020 - 8:30am to 8:45am
Polymeric materials in additive manufacturing add a unique difficulty in characterization to a field that is used to deal with metal powders.
Due to the molecular structure of these polymer powders, moisture and temperature change their behavior to a larger degree than is to be expected with the more common metal feedstock.
Manufacturers have addressed this by bringing the temperature of the feedstock chambers to elevated levels, therefore reducing or eliminating the moisture effects. This in turn creates the problem of reliably measuring the feedstock at these elevated temperatures to give an accurate picture of their properties during use. And in addition the problem of moisture influence during storage prevails.
In this work we will show measurements of polymeric feedstock under actual processing parameters and delve into the problems arising during drying and storage.
It will consist of measurements with temperature and moisture controlled ring shear cells as well as data from our novel temperature-controlled stirrer-based cell with fluidized methods.
While most metal feedstock for additive manufacturing (with the noted exception of aluminium alloys) show little influence of temperature and moisture on the behavior, some examples will be given on the degradation of metal feedstock during prolonged moist storage.
Due to the molecular structure of these polymer powders, moisture and temperature change their behavior to a larger degree than is to be expected with the more common metal feedstock.
Manufacturers have addressed this by bringing the temperature of the feedstock chambers to elevated levels, therefore reducing or eliminating the moisture effects. This in turn creates the problem of reliably measuring the feedstock at these elevated temperatures to give an accurate picture of their properties during use. And in addition the problem of moisture influence during storage prevails.
In this work we will show measurements of polymeric feedstock under actual processing parameters and delve into the problems arising during drying and storage.
It will consist of measurements with temperature and moisture controlled ring shear cells as well as data from our novel temperature-controlled stirrer-based cell with fluidized methods.
While most metal feedstock for additive manufacturing (with the noted exception of aluminium alloys) show little influence of temperature and moisture on the behavior, some examples will be given on the degradation of metal feedstock during prolonged moist storage.