Siraya Tech PETG-CF Pro User Guide

1. Quick Start Settings

For experienced users, here are the critical parameters needed to get started immediately.

Setting

Recommended Value

Nozzle Temperature

250°C – 270°C 

Build Plate Temp

70°C – 80°C 

Print Speed

50 – 250 mm/s 

Cooling Fan

< 50% (Low to Medium) 

Nozzle Type

Hardened Steel (≥ 0.4 mm) 

Retraction

Distance: 1–3 mm | Speed: 30–40 mm/s 

 

2. Introduction

Siraya Tech PETG-CF Pro is a high-flow, short-cut carbon fiber reinforced PETG filament. It is engineered to bridge the gap between ease of use and industrial performance.

Key Features

  • High Flow: Optimized for high-speed printing with reduced dimensional shrinkage.

  • Surface Finish: Delivers a premium "frosted" matte texture that hides layer lines.

  • Enhanced Stability: Significant improvement in warping resistance and overhang quality compared to standard PETG.

3. Preparation & Hardware

3.1 Nozzle Requirements

Carbon fiber is abrasive. You must use a hardened steel nozzle to prevent rapid wear.

  • Diameter: 0.4 mm to 1.0 mm.

  • Material: Hardened Steel.

3.2 Moisture Management (Critical)

PETG-CF is hygroscopic (absorbs moisture). Moisture is the #1 cause of printing issues like stringing and rough surfaces.

  • While Printing: It is highly recommended to feed the filament directly from a dry box during the printing process to prevent oozing and ensure surface smoothness.

  • Storage: Always seal filament in a moisture-resistant bag with desiccant when not in use.

3.3 Build Platform

  • Surface: Glass, PEI Film, or PVP Glue Stick.

  • Leveling: Ensure a perfect first layer. For carbon fiber filaments, avoid "squishing" the first layer too tight, as this can cause nozzle clogs.

4. Detailed Print Parameters

4.1 Temperature & Flow

  • Nozzle: 250-280°C. Start at 255°C for standard speeds. Increase temperature for high-speed printing (>150mm/s) to ensure proper melting.

  • Bed: 70-80°C to prevent warping.

4.2 Speed & Retraction

  • Print Speed: Capable of 30 mm/s up to 300 mm/s depending on your printer's hardware.

  • Retraction Distance: 1 – 3 mm.

Note: Keep this lower than standard PLA to prevent clogging in the heat break.

  • Retraction Speed: 1800 – 2400 mm/min (approx. 30 – 40 mm/s).

4.3 Cooling

  • Fan Speed: Keep below 50%. Excessive cooling can reduce layer adhesion, making the part brittle. For maximum strength, turn the fan off or run very low (10-20%).

5. Troubleshooting Common Issues

Issue

Possible Cause

Solution

Stringing / Oozing

Wet Filament

Dry the filament or print from a dry box.

Temp too high

Reduce nozzle temperature by 5°C steps.

Rough Surface

Wet Filament

Moisture causes steam bubbles. Dry the filament.

Nozzle Clog

Retraction too high

Reduce retraction distance to < 3 mm.

Nozzle too small

Ensure nozzle is ≥ 0.4 mm.

Warping

Bed too cold

Increase bed temp to 80°C and use a brim.

 

6. Technical Specifications

Data based on printed specimens (0.4mm nozzle, 100% infill, ±45° angle).

Property

Test Method

Typical Value

Density

ISO 1183

1.3 g/cm³ 

Tensile Yield Strength (X-Y)

ASTM D638

44 MPa

Young's Modulus (X-Y)

ASTM D638

3400 MPa

Elongation at Break (X-Y)

ASTM D638

7.5 % 

Bending Strength (X-Y)

ISO 178

85 MPa

Heat Deflection Temp (0.45MPa)

ISO 75 Method B

75°C

 

Need further assistance? Visit siraya.tech for support or to explore our complete line of advanced 3D printing materials.