PET Plastic Recycling Workflow: Difference between revisions
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*[https://www.ptonline.com/articles/how-to-dry-pet-for-container-applications Article on Drying PET] | *[https://www.ptonline.com/articles/how-to-dry-pet-for-container-applications Article on Drying PET] | ||
*[https://www.goettfert.com/application-knowledge/rheo-info/for-melt-flow-indexer/moisture-content-in-plastics.html Moisture Content vs [[Melt Flow Index]] ] | *[https://www.goettfert.com/application-knowledge/rheo-info/for-melt-flow-indexer/moisture-content-in-plastics.html Moisture Content vs [[Melt Flow Index]] ] | ||
=Workflow= | |||
#"Raw" plastic recycling in | |||
#Shredding | |||
# "Basic Drying" via being spread thin on a sheet, and left out (in a non-humid area with good airflow) | |||
##Can be stored as is, and do only drying pre-use (ie integrated before the hopper etc) | |||
#IF NOT "Machine Dry" using some sort of device such as a hot air food dehydrator, etc | |||
#Storage in a sealed container with either an attached dehumidifier, or | |||
#(If stored dry, this is optional-ish) "Post Storage - Pre Use" Machine Dry | |||
#Use Flakes in any [[Precious Plastic Machine]] or the [[Open Source FDM Filament Maker]] | |||
=Internal Links= | =Internal Links= |
Revision as of 04:08, 25 July 2020
Basics
- PET (Plastic) undergoes hydrolysis when even slightly damp at it's melting point
- THUS it is best to store it at least moderately dry, and/or dry pre-use (in some process/machine integrated dryer)
To Do
- Specific data on water level vs degradation (a graph of water g/kg vs tensile strength or something?)
- Find Methods of in-machine drying (fluidized in hot air, like a hot air corn popper?)
Research Paper Trashcan
- Hydrolytic and thermal degradation of PET fibers and PET granule: The effects of crystallization, temperature, and humidity -seems spot on on what is needed, need to read
- Article on Drying PET
- Moisture Content vs Melt Flow Index
Workflow
- "Raw" plastic recycling in
- Shredding
- "Basic Drying" via being spread thin on a sheet, and left out (in a non-humid area with good airflow)
- Can be stored as is, and do only drying pre-use (ie integrated before the hopper etc)
- IF NOT "Machine Dry" using some sort of device such as a hot air food dehydrator, etc
- Storage in a sealed container with either an attached dehumidifier, or
- (If stored dry, this is optional-ish) "Post Storage - Pre Use" Machine Dry
- Use Flakes in any Precious Plastic Machine or the Open Source FDM Filament Maker