Topic: [PC] - Sabic Lexan 141R (3mm)
As a followup to my original post on Encom PC 2012, I am now using Lexan 141R for my PC filament extrusion instead of Encom 2012 due to the fact that the former is no longer available where I buy from. It is also almost identical to the resin that Airwolf3D uses for their PC filament - Lexan 143R.
The resin I ordered was already colored in black. I did this to avoid dealing with masterbatch.
Note that I am extruding 3mm filament.
Resin: PC - Sabic Lexan 141R
Machine used: Filastruder# 1577
FILASTRUDER CHANGES:
The only significant change that I have made is changing the HEATER power supply to 15v. This is necessary for higher temperatures - the original 12v heater is included as a safety to limit the heater's maximum temperature.
DETAILS:
Tip Diameter: 2.7mm
Extruded temperature: 255°C
Speed of extrusion: 10" / min
Filament diameter and tolerance: 2.85mm +/- 0.05mm
Pre-extrusion processing: Food dehydrator for 12 hours
Extruded PC vs purchased PC: My extruded PC has a slightly rougher finish than store-bought PC (from Airwolf3D). It's not rough enough to feel in most places but it can be seen from the reflected light. I suspect this could be fixed by drying the pellets longer, although it prints just fine.
COMMENTS:
-The datasheet suggests drying at 121°C (250°F) for 3-4 hours. This might fix the problem I am having with roughness.
-To fine-tune diameter, a change of 10° is roughly equal to a change of 0.10mm
-Extra cooling might be needed when extruding 3mm filament - PC and PC-ABS have a tendency to stretch at the nozzle. The weight of the filament also effects this, as does the filament not hanging in a perfect simi-circle (if using a filawinder). My filawinder is 30" away and the sensor is 15" down in the center.
- 1KG took 7 hours to extrude.
Sabic Lexan 141R
Filastruder Setup
Dia. 2.85mm +/- 0.05
Extruded Filament
Part printed with extruded Sabic Lexan 141R
-Airwolf HD2x w/ E3D v6 + Volcano
-Custom built Solidoodle 3 clone w/ E3D v6+ Volcano -Solidoodle Press w/ E3D Lite6
Filastruder #1577