---
product_id: 649576543
title: "Siraya Tech Fibreheart PET-CF 3D Printer Filament, High Strength, Black 1kg"
brand: "siraya tech"
price: "¥21727"
currency: JPY
in_stock: true
reviews_count: 5
category: "Siraya Tech"
url: https://www.desertcart.jp/products/649576543-siraya-tech-fibreheart-pet-cf-3d-printer-filament-high-strength
store_origin: JP
region: Japan
---

# Carbon fiber reinforced strength Superior dimensional stability Lightweight yet durable Siraya Tech Fibreheart PET-CF 3D Printer Filament, High Strength, Black 1kg

**Brand:** siraya tech
**Price:** ¥21727
**Availability:** ✅ In Stock

## Summary

> 🖤 Print Strong, Print Smart — Elevate Your 3D Game with Siraya Tech Fibreheart PET-CF!

## Quick Answers

- **What is this?** Siraya Tech Fibreheart PET-CF 3D Printer Filament, High Strength, Black 1kg by siraya tech
- **How much does it cost?** ¥21727 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/649576543-siraya-tech-fibreheart-pet-cf-3d-printer-filament-high-strength)

## Best For

- siraya tech enthusiasts

## Why This Product

- Trusted siraya tech brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Precision That Lasts:** Advanced PET matrix ensures minimal warping and shrinkage, keeping your designs flawless.
- • **Lightweight Durability:** Perfect balance of strength and low weight, ideal for drones, sports gear, and mechanical parts.
- • **Effortless Printability:** Optimized for smooth extrusion and excellent layer bonding—complex models made easy.
- • **Versatile for Pros & Makers:** From prototypes to custom projects, trusted by engineers and hobbyists alike.
- • **Unmatched Strength & Rigidity:** Reinforced carbon fiber mesh delivers industrial-grade toughness for demanding prints.

## Overview

Siraya Tech Fibreheart PET-CF is a premium 1kg 3D printer filament combining PET with carbon fiber reinforcement for exceptional strength, heat resistance, and dimensional stability. Featuring Smart Fiber Reinforced technology, it minimizes warping and shrinkage while maintaining lightweight durability. Ideal for professional-grade functional parts and complex designs, this filament offers easy printability and reliable performance for engineers, designers, and advanced hobbyists.

## Description

Discover advanced 3D printing with Siraya Tech Fibreheart PET-CF filament. The Fibreheart PET-CF from Siraya Tech is a state-of-the-art 3D printer filament that combines the benefits of PET with the strength of carbon fibre reinforcement. Our Smart Fiber Reinforced Technology ensures optimal distribution of chopped carbon fibres, which form a load-bearing mesh skeleton within the PET matrix. The result is a filament with exceptional mechanical properties, heat resistance and dimensional stability. Fibreheart PET-CF shows superior performance with low creep tendency thanks to the highly regular molecular chain structure of PET and rigid benzene rings. Compared with PA and PC materials, it retains better mechanical properties and resists deformation under long-term loads. Experience hassle-free printing with excellent dimensional stability – without warping, shrinkage or odour. Fibreheart PET-CF is compatible with easily removable support materials for successful printing of complex models. This versatile high-performance filament is perfect for demanding applications that require both the longevity of carbon fibers and the precision and chemical resistance of PET. Engineers, designers and hobbyists will appreciate the strength and reliability of printed parts. For best results, print Fibreheart PET-CF using our recommended settings from the user guide and use a hardened steel nozzle. While an active heated chamber is required, it is important to have a closed printer. If the filament is exposed to moisture, dry it in the oven at 100-120°C for 4-6 hours to restore the print quality. Store unused filament in its vacuum bag between uses.

Review: Prijsverschil - gekocht voor 31,57 om te testen en het werkte prima dus eigenlijk 5 sterren maar wilde het een week later weer bestellen maar was toen ruim 21 euro duurder. Vandaar maar 3 sterren. Moet nu weer op zoek naar een ander merk met wel een fatsoenlijke prijs of wachten totdat de prijsverhoging ongedaan gemaakt wordt. De huidige prijs op desertcart.de is nu 37,99 daar zou ik het ook nog voor gekocht hebben.
Review: Make it (not) snappy - While this review is technically for the CF since that’s the order I selected to review, I’ve purchased both the black PET-CF and the FDE PET-GF from this listing. I like them both. The GF is a dream to print. Every bit as easy as PLA. I had problems with the CF and I think others have had the same problem with an excessively brittle spool that snaps in the feed tube, but I was able to fix that. I use a Centauri carbon with a .6mm nozzle and print directly from a Sunlu S2 dryer. First of all, SirayaTech says to NOT dry the filament right out of the bag. They say that they dry the spools before packaging and that too high a dry temp can initiate the annealing process and make the filament unprintable, so I took their advice. Like I said the GF printed flawlessly but the CF was horribly brittle. Siraya also says to dry your spools if you have problems, and after about 18 hours in a food dehydrator at 60c it’s printing just as nicely as the GF. But Siraya also says to print this stuff at 300 and that caused stringing so I’m running it at 295 with much better results. So if you’re having problems with the CF breaking excessively, dry it low and slow. I put mine in the dehydrator before bed last night, took it out once I got home from work, and loaded it into my Sunlu S2 for printing. So far so good. I’m halfway through the print and no breakage. Last time I tried printing this filament it broke on like layer 12. I’ll add that I also turned the speed way down, cutting it roughly in half in the slicer and then running the whole print on silent mode. Seems to be working great now and so far I’m extremely impressed with Siraya’s filaments. Great materials at a very reasonable price. I’ll be really interested to test this stuff head to head against another one of my favorites — Sunlu’s carbon and glass filled PA6. I think this Siraya PET and the Sunlu PA6 are both incredible values when it comes to high performance filament. The obvious advantage of the Siraya reinforced PET is that it’s almost as easy to print as PLA. I’ve never had issues with it tangling and the finished prints look fantastic.

## Features

- Improved Performance & Reliability Our PET-CF filament is a high-performance composite material that combines polyethylene terephthalate (PET) with carbon fibers. The PET-CF 3D filament ensures easy printability, good layer bonding and excellent mechanical properties. It offers increased rigidity, improved dimensional stability and significantly higher strength.
- Intelligent Fiber Reinforcement Technology Carbon fibers form a mesh skeleton within the PET matrix, which greatly improves the mechanical properties, heat resistance and dimensional stability. Thanks to the internal stress release, no deformation occurs.
- Superior Dimensional Stability The highly regular molecular chain structure of PET and stiff benzene rings lead to better mechanical properties and less deformation under long-term stress compared to PA and PC materials. Our PET-CF filament reduces warping and shrinkage, keeping your prints maintain their precise dimensions and shapes - crucial for functional parts and complex designs.
- LIGHTWEIGHT AND DURABLE Our PET-CF filament offers a perfect balance between longevity and a lightweight profile. Its low moisture absorption makes it ideal for applications where both strength and weight are crucial factors. It is an excellent material for making robust but lightweight components such as drone parts, mechanical assemblies and sports equipment.
- VERSATILE APPLICATIONS Whether you need reliable, high-strength components as a professional, or working on detailed, functional projects as a hobbyist, our PET CF filament is versatile enough to meet a variety of needs. Its easy printability and mechanical properties make it suitable for everything from industrial prototypes to custom sports equipment.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CSPFL7MB |
| Additional Features | PET-CF composite material with Smart Fiber Reinforced technology |
| Brand | Siraya Tech |
| Brand Name | Siraya Tech |
| Color | Pet-cf Black 1kg |
| Colour | Pet-cf Black 1kg |
| Customer Reviews | 4.4 out of 5 stars 244 Reviews |
| Global Trade Identification Number | 00850019574630 |
| Item Diameter | 1.75 Millimeters |
| Item Highlight | Carbon Fiber Reinforced PET, High Strength & Rigidity, Easy Print, Dimensionally Stable, Aluminum Foil Sealed Bag |
| Item Weight | 1.2 Kilograms |
| Item diameter | 1.75 Millimeters |
| Item weight | 1.2 Kilograms |
| Manufacturer | Siraya Tech |
| Manufacturer Part Number | 2.5kg PET-CF Black |
| Material | PET-CF |
| Material Type | PET-CF |
| Model Number | 3003 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Special features | PET-CF composite material with Smart Fiber Reinforced technology |
| Unit Count | 1000.0 Grams |

## Product Details

- **Brand:** Siraya Tech
- **Colour:** PET-CF Black
- **Item diameter:** 1.75 Millimeters
- **Item weight:** 1.2 Kilograms
- **Material:** PET-CF

## Images

![Siraya Tech Fibreheart PET-CF 3D Printer Filament, High Strength, Black 1kg - Image 1](https://m.media-amazon.com/images/I/713TvuvfSiL.jpg)
![Siraya Tech Fibreheart PET-CF 3D Printer Filament, High Strength, Black 1kg - Image 2](https://m.media-amazon.com/images/I/71-VLQmVE5L.jpg)
![Siraya Tech Fibreheart PET-CF 3D Printer Filament, High Strength, Black 1kg - Image 3](https://m.media-amazon.com/images/I/71nfIHSPvsL.jpg)
![Siraya Tech Fibreheart PET-CF 3D Printer Filament, High Strength, Black 1kg - Image 4](https://m.media-amazon.com/images/I/71PLVQOZuHL.jpg)
![Siraya Tech Fibreheart PET-CF 3D Printer Filament, High Strength, Black 1kg - Image 5](https://m.media-amazon.com/images/I/61sltLj0XxL.jpg)

## Customer Reviews

### ⭐⭐⭐ Prijsverschil
*by R***E on 18 March 2026*

gekocht voor 31,57 om te testen en het werkte prima dus eigenlijk 5 sterren maar wilde het een week later weer bestellen maar was toen ruim 21 euro duurder. Vandaar maar 3 sterren. Moet nu weer op zoek naar een ander merk met wel een fatsoenlijke prijs of wachten totdat de prijsverhoging ongedaan gemaakt wordt. De huidige prijs op amazon.de is nu 37,99 daar zou ik het ook nog voor gekocht hebben.

### ⭐⭐⭐⭐⭐ Make it (not) snappy
*by E***C on 30 March 2026*

While this review is technically for the CF since that’s the order I selected to review, I’ve purchased both the black PET-CF and the FDE PET-GF from this listing. I like them both. The GF is a dream to print. Every bit as easy as PLA. I had problems with the CF and I think others have had the same problem with an excessively brittle spool that snaps in the feed tube, but I was able to fix that. I use a Centauri carbon with a .6mm nozzle and print directly from a Sunlu S2 dryer. First of all, SirayaTech says to NOT dry the filament right out of the bag. They say that they dry the spools before packaging and that too high a dry temp can initiate the annealing process and make the filament unprintable, so I took their advice. Like I said the GF printed flawlessly but the CF was horribly brittle. Siraya also says to dry your spools if you have problems, and after about 18 hours in a food dehydrator at 60c it’s printing just as nicely as the GF. But Siraya also says to print this stuff at 300 and that caused stringing so I’m running it at 295 with much better results. So if you’re having problems with the CF breaking excessively, dry it low and slow. I put mine in the dehydrator before bed last night, took it out once I got home from work, and loaded it into my Sunlu S2 for printing. So far so good. I’m halfway through the print and no breakage. Last time I tried printing this filament it broke on like layer 12. I’ll add that I also turned the speed way down, cutting it roughly in half in the slicer and then running the whole print on silent mode. Seems to be working great now and so far I’m extremely impressed with Siraya’s filaments. Great materials at a very reasonable price. I’ll be really interested to test this stuff head to head against another one of my favorites — Sunlu’s carbon and glass filled PA6. I think this Siraya PET and the Sunlu PA6 are both incredible values when it comes to high performance filament. The obvious advantage of the Siraya reinforced PET is that it’s almost as easy to print as PLA. I’ve never had issues with it tangling and the finished prints look fantastic.

### ⭐⭐⭐⭐⭐ Muy buen material
*by J***E on 3 February 2026*

Muy rígido, buena adhesión entre capas, fácil de imprimir… Lo tiene todo, hasta el acabado es bonito, un poco rugoso. Imprimiendo a 290

## Frequently Bought Together

- Siraya Tech Fibreheart PET-CF 3D Filament - Carbon Fiber Reinforced, High Strength & Rigidity, Easy Print, Dimensionally Stable, Aluminum Foil Sealed Bag - for Strong and Precise Parts (Black, 1kg)
- Polymaker PLA PRO Filament 1.75mm 1kg, Tough & High Rigidity Black 3D Printing Filament, PolyLite PLA PRO 3D Printer Filament 1.75mm, Print with Most 3D Printers
- Polymaker Fiberon PET-CF17 3D Printing Filament Black 1.75mm 0.5kg, Excellent Stable Stiffness - Fiberon Carbon Fiber Reinforced PET 3D Printer Filament, Ideal for Jigs and Fixtures

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-09-18*