PET Plastic Recycling Workflow: Difference between revisions
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*Specific data on water level vs degradation (a graph of '''water g/kg vs tensile strength''' or something?) | *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?) | *Find Methods of in-machine drying (fluidized in hot air, like a hot air corn popper?) | ||
=Research Paper Trashcan= | |||
*[https://www.researchgate.net/publication/228004745_Hydrolytic_and_thermal_degradation_of_PET_fibers_and_PET_granule_The_effects_of_crystallization_temperature_and_humidity 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 | |||
*[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]] ] | |||
=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 internal package of dessicant | |||
#(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= | ||
Latest revision as of 00:32, 29 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 internal package of dessicant
- (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