Differences

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--- filaments:pet [2025/01/25 18:17] – [Annealing] tys-user
+++ filaments:pet [2025/01/30 13:05] (current) – [Disadvantages] Added info about high drying temperature kubuxu
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 ====== PET - Polyethylene Terephthalate ======
-PET is a common material, often found in rigid bottles for low-temperature goods such as peanut butter or sports drinks. It is the most readily accessible semi-crystalline polymer and is therefore difficult to print. Recent development of filled (CF/GF) PET filaments have resolved much of the printability issues inherent to pure PET.
+PET is a common material often found in rigid bottles for low-temperature goods such as peanut butter or sports drinks. It is the most readily accessible semi-crystalline polymer and is therefore difficult to print. Recent development of filled (CF/GF) PET filaments have resolved much of the printability issues inherent to pure PET.
 ==== Advantages ====
   * Reasonable value for temperature resistance
   * Broad color variety
-  * Filled PET printable on machines without enclosure
+  * Filled PET printable with low (even no!) chamber temperatures
 ==== Disadvantages ====
   * Requires post-processing (annealing) for best performance
   * Pure PET is difficult to work with
+  * Extremely hygroscopic - requires filament dryer with higher than normal temperature (80C) and [[equipment:drybox|drybox]]
 ==== Variants ====
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 Placeholder: We recommend 120C annealing, which produces parts good to ~100C. Higher temperatures are more difficult to process PET parts with, but yield parts with greater temperature resistance.
+Make sure you calibrate your printer to the post-processed product (post annealing). Generally, you can expect approximately 1% shrink. This //will// cause undersized holes in your parts, so calibration is crucial when printing assemblies.
+==== Vendors ====
+With recent popularity in PET, several vendors are offering products. Despite identical labeling, experiences have varied between brands.
+Note that vendors may change their suppliers, additives, and overall quality without notice. This page may become outdated - if this occurs, please update this page.
+^  Product  ^ Notes  ^
+|Phaetus aeForce  PET-GF  |High quality filled PET  |
+|Fusrock  PET-GF  |High quality filled PET  |
+|Qidi PET-CF  |High quality filled PET  |
+|Raise3D PET-GF/-CF  |High quality filled PET  |
+|Bambu PET-CF  |Tends to melt instead of annealing, expensive  |
+|Siraya Tech PET-CF  |Lower CF content (10%) than others, sensitive to annealing temperatures  |
+|Siddement PET-CF  |Abnormally low temperatures for PET (-50C) compared to others, poor results when annealing/calibrating  |
+|Polymaker PET-CF  |Somewhat flexible, generates dust - abnormally low temperatures compared to others. Printing issues have been observed with 0.6mm nozzles.  |
+Although each of these filaments have been tested with similar observations, it is currently theorized that Phaetus, Fusrock, Qidi, and Raise 3D are currently selling the same product.
 ==== Baseline Printing Recommendations ====
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 These numbers are provided as a baseline, and **need** adjustment and calibration for your specific printer/filament/color combination.
-^  Variant  ^  Hotend Temperature  ^  Heatbed Temperature  ^  Chamber Temperature  ^ Optimistic Usable Temperature ^
+^  Variant  ^  Hotend Temperature  ^  Heatbed Temperature  ^  Chamber Temperature  ^ [[filaments:maximum_temperature#optimistic_usable_temperature|Optimistic Usable Temperature]] ^  Drying Temperature  ^
 |PET  |?  |?  |?  |?  |
-|PET-GF  |300C  |110C  |None  |100C  |
+|PET-GF/-CF  |300-320C  |80C  |None  |100C((Depends on annealing procedure))  |80-100C  |
-|PET-CF  |?  |?  |?  |?  |
 ==== Other notes ====
 PET has powerful adhesion to PEI sheets. It is highly recommended to use an interface material like PVA (generic glue-stick) or other products to prevent PEI sheet damage.