SUNLU or Siraya Tech? 3d Printing Filaments Compared in 2026
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You are comparing SUNLU vs siraya tech 3d printing filament options for different needs. Both brands offer 1kg spools compatible with standard FDM printers. The main difference lies in the material composition. SUNLU provides standard PLA for ease of use. Siraya Tech offers PET-CF, a composite with carbon fiber for higher strength. You should choose based on whether you prioritize simplicity or mechanical performance.
Key differences
| Aspect | SUNLU 1.75mm Black PLA Filament 1kg | Siraya Tech Fibreheart PET-CF 1kg |
|---|---|---|
| Material Type | PLA | PET-CF (Polyethylene Terephthalate with Carbon Fiber) |
| Filament Diameter | 1.75mm | not listed |
| Dimensional Accuracy | +/- 0.02mm | not listed |
| Max Print Speed | 100mm/s | not listed |
| Key Features | No clogs, bubbles, or tangles; neat winding | High strength, stiffness, and dimensional stability; no warpage |
Which one should you choose?
Choose SUNLU 1.75mm Black PLA Filament 1kg if
- You need a reliable, easy-to-use material for general prototyping or beginner projects.
- You want precise dimensional accuracy and consistent layer adhesion for standard prints.
- You prefer a filament with recommended nozzle temperatures between 200-230°C and bed temperatures of 50-65°C.
Choose Siraya Tech Fibreheart PET-CF 1kg if
- You require high-strength, lightweight parts for functional applications like drone components or mechanical assemblies.
- You need improved stiffness and heat resistance compared to standard PLA.
- You want to minimize warping and shrinkage for intricate designs requiring long-term dimensional stability.
Verdict: Choose SUNLU if you value ease of use, precise dimensions, and reliable performance for general printing tasks. Select Siraya Tech Fibreheart PET-CF if you need durable, stiff, and lightweight parts for functional applications. Your choice depends on whether simplicity or mechanical strength is your priority.
SUNLU vs Siraya Tech Filament Specs
Material Composition
The fundamental difference starts with the polymer base. SUNLU offers standard PLA, a material known for being reliable, versatile, and easy to use. It is ideal for beginners and experienced users who want straightforward printing. Siraya Tech provides PET-CF, a high-performance composite blending Polyethylene Terephthalate with carbon fiber. This smart fiber-reinforced technology creates a mesh skeleton structure within the PET matrix. The result is significantly improved strength, stiffness, and heat resistance compared to standard plastics. You choose PLA for simplicity or PET-CF for mechanical performance.
Dimensional Accuracy
Precision matters for consistent extrusion. SUNLU specifies a dimensional accuracy of +/- 0.02mm for its 1.75mm filament. This tight tolerance ensures wide compatibility with almost all 1.75mm FDM 3D printers by minimizing diameter error. Siraya Tech lists the material type as PET-CF but does not provide specific dimensional accuracy figures in the published data. Without explicit tolerance data for Siraya Tech, you cannot verify if it matches SUNLU’s precision. For buyers who require guaranteed tight tolerances to prevent jams, SUNLU’s stated accuracy offers a clear advantage in predictability.
Print Speed
Maximum print speed capabilities vary between the two options. SUNLU recommends a printing speed range of 50-100mm/s to achieve the best results. This moderate speed ensures good layer adhesion and high-quality prints without risking defects. Siraya Tech highlights that the filament maintains ease of printing despite its composite nature, but it does not list a specific maximum print speed in the provided specifications. If you prioritize faster production times, SUNLU’s explicit 100mm/s recommendation gives you a defined target. Siraya Tech’s speed limits remain undefined in the data.
Structural Strength
Mechanical properties define functional utility. Siraya Tech’s PET-CF is engineered for high strength and durability. The carbon fiber reinforcement greatly improves mechanical properties, heat resistance, and dimensional stability. It reduces warping and shrinkage, ensuring prints maintain precise dimensions under long-term load. This makes it suitable for drone parts, mechanical assemblies, and sporting equipment. SUNLU’s PLA is described as having excellent layer adhesion for high-quality prints but is not marketed for high-stress functional applications. For robust, lightweight, and stiff parts, Siraya Tech offers superior structural integrity.
Spool Dimensions
Physical spool size affects printer compatibility. SUNLU provides exact spool dimensions: 8.00 inches in diameter, 2.50 inches in width, and a 2.20-inch hub hole. These measurements are suitable for hanging on many standard FDM 3D printers. Siraya Tech lists overall product dimensions of 8.27 inches in height and 2.91 inches in width, but does not specify the spool hub hole diameter or exact spool width separately. The slightly larger footprint of Siraya Tech may impact storage or compatibility with certain printer spool holders. SUNLU’s detailed spool specs ensure better fit verification.
Choose Your 3D Printing Filament
Beginners making simple models
SUNLU PLA is reliable and easy to use. It has wide compatibility with almost all 1.75mm FDM printers. The dimensional accuracy of +/- 0.02mm ensures smooth printing. You can print at speeds up to 100mm/s. The neat winding reduces tangles and jams. This makes it ideal for beginners and experienced users seeking straightforward results.
Users needing strong functional parts
Siraya Tech Fibreheart PET-CF blends PET with carbon fiber. This composite offers high strength and stiffness. The carbon fiber mesh improves mechanical properties and heat resistance. It maintains precise dimensions with less warping. This material is perfect for robust components like drone parts or mechanical assemblies where durability matters.
Printers wanting lightweight durability
Siraya Tech PET-CF balances strength with a lightweight profile. Its low moisture absorption rate helps maintain part integrity. The filament reduces shrinkage and warping for intricate designs. You get improved dimensional stability under long-term load. This makes it excellent for sporting equipment or custom parts that need to be both strong and light.
The products compared
SUNLU 1.75mm Black PLA Filament 1kg
Best for: general prototyping and beginner-friendly printing
- Material Type
- PLA
- Filament Diameter
- 1.75mm
- Net Weight
- 1kg
- Max Print Speed
- 100mm/s
- Dimensional Accuracy
- ±0.02mm
- Printing Technology
- FDM
View on Amazon: SUNLU 1.75mm Black PLA Filament 1kg Affiliate link
This SUNLU PLA filament is a 1.75mm material designed for FDM 3D printers. It offers dimensional accuracy of +/- 0.02mm to ensure compatibility with most machines. The black 1KG spool features neat winding to reduce tangles and jams. You can print at speeds up to 100mm/s with recommended nozzle temperatures between 200-230°C. It suits beginners and experienced users looking for reliable, versatile printing.
Pros
- Dimensional accuracy of +/- 0.02mm for wide printer compatibility
- 100% neat winding rate reduces tangles and jams
- Recommended max print speed of 100mm/s
- No clogs or bubbles reported in standard use
Cons
- Standard PLA material lacks the high strength of composite filaments
- 1KG spool size is smaller than bulk industrial options
- Requires specific temperature settings (200-230°C nozzle) for best results
Good fit if
- You need reliable, easy-to-use filament for general prototyping
- You want to minimize print failures from tangled spools
- You are printing with standard FDM 3D printers
Skip if
- You require high-strength materials like carbon fiber composites
- You need filament for large-scale continuous production runs
- You prefer materials that do not require heated beds
Verdict: SUNLU PLA Filament 1.75mm Black 1KG is a practical choice for users who prioritize consistent layer adhesion and tangle-free printing. It fits hobbyists and makers who need dependable performance for everyday projects rather than specialized engineering applications.
Siraya Tech Fibreheart PET-CF 1kg
Best for: High-strength functional prototypes and drone parts
- Material Type
- PET-CF
- Net Weight
- 1kg
- Features
- Carbon Fiber
- Dimensions
- 8.27 × 2.91 × 8.27 inches
- Weight
- 2.65 pounds
View on Amazon: Siraya Tech Fibreheart PET-CF 1kg Affiliate link
Siraya Tech PET-CF Black 1kg is a composite filament blending PET with carbon fiber. It offers high stiffness, improved dimensional stability, and reduced warping. The material maintains ease of printing while delivering superior strength. It suits users needing lightweight, durable parts for functional applications. This 1kg spool balances mechanical performance with print reliability.
Pros
- Blends PET with carbon fiber for high strength
- Reduces warping and shrinkage for precise dimensions
- Low moisture absorption for durable parts
- Lightweight profile suitable for drone components
Cons
- Only available in 1kg spool size
- Limited color options in this specific product line
- Higher stiffness may require adjusted print settings
Good fit if
- You need high-strength functional prototypes
- You require parts with minimal warping
- You are printing lightweight drone components
Skip if
- You prefer standard PLA flexibility
- You need large 2.5kg spool sizes
- You require multi-color printing capabilities
Verdict: Siraya Tech PET-CF Black 1kg delivers robust mechanical properties for users prioritizing strength and stability. It fits engineers and hobbyists building precise, lightweight functional parts.
Specifications side by side
| Spec | SUNLU 1.75mm Black PLA Filament 1kg | Siraya Tech Fibreheart PET-CF 1kg |
|---|---|---|
| Material Type | PLA | PET-CF |
| Filament Diameter | 1.75mm | not stated |
| Net Weight | 1kg | 1kg |
| Max Print Speed | 100mm/s | not stated |
| Dimensional Accuracy | ±0.02mm | not stated |
| Printing Technology | FDM | not stated |
| Compatible Material | PLA | not stated |
| Features | not stated | Carbon Fiber |
| Color | Black | Pet-cf Black 1kg |
| Size | 1KG | not stated |
| Surface Finish | Smooth | not stated |
| Dimensions | 8.66 × 8.66 × 3.15 inches | 8.27 × 2.91 × 8.27 inches |
| Weight | 2.21 pounds | 2.65 pounds |
| Model | 3D Printer Filament PLA Filament 1.75mm | 3003 |
Frequently asked questions
Is SUNLU PLA filament good for beginners?
Yes, it is an excellent choice for beginners. It is designed for general prototyping and offers consistent layer adhesion. The 1.75mm width fits standard FDM printers. You get a tangle-free experience on the 1kg spool. This reliability makes everyday projects straightforward without complex settings.
What is the best Siraya Tech filament for strong parts?
The Siraya Tech Fibreheart PET-CF is ideal for strength. It provides robust mechanical properties for functional prototypes. This material suits users building drone parts or precise components. The black color helps hide layer lines. You get high stability in a 1kg package for demanding applications.
Can I use these filaments on any 3D printer?
Both brands support standard 1.75mm FDM printers. SUNLU PLA is compatible with almost all machines for hobbyists. Siraya Tech PET-CF also uses the standard 1.75mm diameter. You should check your printer’s specific temperature and speed limits for the composite material to ensure smooth feeding.
Which filament is better for lightweight drone parts?
Siraya Tech PET-CF is the better option. It delivers high strength while maintaining a lightweight profile. This makes it perfect for drone frames and functional engineering parts. SUNLU PLA is softer and less suitable for stress-bearing components. Choose Siraya Tech for structural integrity and durability.
How much filament do you get per spool?
Both SUNLU and Siraya Tech provide 1kg spools. The SUNLU PLA weighs 2.21 pounds total. The Siraya Tech PET-CF weighs 2.65 pounds total. This standard size fits most hobbyist and professional printers. You get enough material for multiple projects without frequent spool changes.
What color options are available for these brands?
SUNLU offers Black PLA in this comparison. Siraya Tech provides PET-CF in Black. These neutral colors hide minor imperfections well. You get consistent coloration throughout the 1kg spool. Check the brand website for other color variations if you need specific aesthetics for your prints.