SKU: 15597799150

Polymaker Fiberon PA6-GF25 Nylon Glass Fibre 1.75mm Filament 500g (Previously Polymide)

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Description

Polymaker Fiberon PA6-GF25 Nylon Glass Fibre 1.75mm Filament 500g (Previously Polymide)Fiberon is polymakers family of fibre reinforced composite filaments developed to provide outstanding mechanical performance for a range of engineering applications. Fiberon PA6 GF25 is an industrial glass fibre reinforced PA6 (Nylon 6) filament featuring 25% chopped glass fibres by weight. The material exhibits excellent thermal and mechanical properties without sacrificing the layer adhesion like with many other glass fibre reinforced filaments.

Fiberon™ is polymakers family of fibre-reinforced composite filaments developed to provide outstanding mechanical performance for a range of engineering applications.

Fiberon™ PA6-GF25 is an industrial glass fibre reinforced PA6 (Nylon 6) filament featuring 25% chopped glass fibres by weight. The material exhibits excellent thermal and mechanical properties without sacrificing the layer adhesion like with many other glass-fibre reinforced filaments. This is achieved through Polymakers Fibre-Adhesion™ technology which optimises the surface chemistry of the fibres to achieve better dispersion and bonding to the Nylon 6 matrix and delivers an outstanding filament for functional applications. Fiberon™ PA6-GF25 offers an excellent cost-to-performance ratio for many end-use and functional applications.

Features

  • Excellent Stiffness & Strength - Featuring a tensile modulus up to 5.3 GPA on the XY axis and 3.3 GPA on the Z axis, Fiberon™ PA6-GF25 combines excellent stiffness and toughness to deliver a versatile and high performance filament for a wide variety of high performance and dry industrial or engineering applications[1].
  • Excellent Heat Resistance - Featuring a heat deflection temperature of up to 191°C after annealing[2], Fiberon™ PA6-GF25 can be used to print parts working in a wide temperature range and has been utilised to create custom lab equipment working at temperatures as low as -190°C.
  • Outstanding Layer Adhesion - Most fibre reinforced materials show a decrease in z-axis layer adhesion when compared with their non-fibre reinforced Nylons, producing a part that is only stronger on the X-Y axis but detrimental to the Z axis. Fibre-Adhesion™ technology not only solves this problem but actually increases Z axis tensile strength creating more isotropic parts that are strong in every direction.
  • Warp-Free™ - Warp-Free™ technology enables the production of Nylon-based filaments that can be 3D printed with excellent dimensional stability and near-zero warpage. This is achieved by the fine control of microstructure and crystallisation behaviour of Nylon, which enables the material to fully release the internal stress before solidification. The Warp-Free™ technology is designed to work best with minimal bed temperatures.
  • Wear Resistant and Tough - Parts printed in Fiberon™ PA6-GF25 display excellent strength and wear resistant properties.
  • Improved Printability – Unlike many other Nylon filaments, Fiberon™ PA6-GF25 is extremely easy to work with, exhibiting excellent dimensional stability. It is compatible with most filament-based 3D printers with no heated bed or chamber required!
  • Uncompromised Quality - Polymakers leading quality control process and rigorous in-house testing ensure reliable printing and consistency across spools and batches.

[1] Most Nylon parts in the real world undergo a process called "Moisture conditioning" which improves toughness and flexibility of the Nylon while reducing tensile strength and stiffness. Unless protected with a moisture barrier, PA6-GF shows a greater change in mechanical properties when subjected to water / high humidity in comparison to long-chain nylon filaments like PA12-CF or PA612-CF. In simple terms PA6-GF will typically offer the best properties in a dry application, but for a wet or high humidity application a longer chain nylon such as PA612 or PA12 may be better. See "Specifications & FAQ" tab to learn more about what moisture conditioning is, how it works and if it's relevant to your application.
[2] Fiberon™ PA6-GF25 displays the best mechanical and thermal properties when fully crystallized. The printed part will not reach full crystallisation during the printing process, an additional step is required: Annealing. Fiberon™ PA6-GF25 can be annealed in the oven at 100˚C for 16 hours right after the printing process.

Physical Properties

Thermal Properties

Nylon is a semi-crystalline material, it's crystalline regions offer many properties, but in particular their structure deliver the heat resistance that nylon is known for. Annealing after printing is a critical process to achieve consistent crystallinity and complete the production process of nylon parts.

Mechanical Properties

  • Dry state represents when PA6-GF25 part is printed and annealed.
  • Wet state represents if the PA6-GF25 part were submerged in water for 48 hours.

If your part is exposed to reasonable humidity (70% RH) but isn't exposed to water, your part would become moisture conditioned. To enter the wet state would require very high humidity, steam or submersion.

Nylon 6 based materials are moisture sensitive and their mechanical properties change. As they absorb moisture the toughness and flexibility increase, while tensile strength and stiffness decrease. This process is not permanent, if the part were dried, it would regain strength and stiffness.

    All PA6-GF25 specimens were printed with 300°C nozzle temperature, 50°C bed temperature, cooling fan OFF. Samples were printed with 100% infil, 2 shells and 3 top & bottom layers.

    All samples were annealed after printing at 100°C for 16h.

    Data taken from Polymakers Technical Data Sheet and is intended for reference and comparison purposes only. Due to the nature of 3D printing, data should not be used for design specifications or quality control purposes.

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    Shipping Notes
    • Free Standard Shipping on $100+ Orders to the USA.
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    Exchange/Return Notes
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    • Final sale items are not eligible for returns or exchanges.
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    SKU: 15597799150

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    4.8 ★★★★★
    Based on 18 reviews
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    Susan Cartwright
    Draper, US
    ★★★★★ 5
    Overall, these are some of the most comfortable flip flops I have owned, and would buy again.
    Size: 6.5, Color: White Khaki
    I was so happy with these KuaiLu Flip Flops that I bought two more pair, one in black and one in brown! They were comfortable right out of the box and did not need any break-in time. The arch support is excellent and gives my feet much better support than regular flip flops. They are also light weight, well made, and cute enough to wear with many different outfits. The soles have good traction, and they feel sturdy when walking.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 28, 2026
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    Carolyn Fenzl
    Omaha, US
    ★★★★★ 5
    Nice Flip Flops for the Price!
    Size: 7.5, Color: White Khaki, Size: 7.5, Color: White Khaki
    I just received my flip flops and tried them on, and they have a nice cushiony feel to them. The white color matches many of my outfits great. And while the fit is generally good, they could be a bit wider as I have wide feet. But they still feel comfortable.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 18, 2026
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    Nellie from Wisconsin
    Charlottesville, US
    ★★★★★ 4
    runs big
    Size: 7.5, Color: Camel
    I am always a size 8 in boots, sandals, sneakers and read these ran large so ordered a size 7.5. They are still too big on me. I sent back for a 7 and I will update when I get those. They are very, very cute and comfortable! I love the cloth that goes over the foot!! That makes them seem a bit more fancy than regular flip flops. They also do sound like regular flip flops, so if you want a quiet sandal these are not for you. They are very cushioned and I can def feel the arch support. You will need to size down at least half size and maybe one whole size. The hardest thing for me was to pick a color! May have to get several pair! Just ordered my mom the dark blue and I know she will love them!!! Highly recommend, especially for the low price! Update: Got the 7 and are still too big. As I said, I got my mom the 6 so I tried them on and they are still a tad too big on me!!! BTW the sizes 8,7.5,7 and the 6 I can hardly see any difference whatsoever! They don't come in 5 1/2 so I am sending the 7 back for a 6 and keeping those just because they are so darn cute and comfortable! I also don't have a very thick foot so I wish the straps were a tad tighter, but I will deal with it. So, to sum up: Be sure to size down at least one size and maybe even two. Returns are easy, so maybe try a few different sizes! I haven't worn a size 6 since I was in about the 6th grade, so not sure what is going on with the sizing. Oh yeah, I did get three different colors and the sizing was the same with all three. HTH! Good luck!
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    Reviewed in the United States on March 26, 2026
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    Amazon user
    Waukegan, US
    ★★★★★ 5
    Super comfortable from the first wear! Unique soles
    Size: 10, Color: White Khaki
    My husband actually picked these shoes out and bought them for me without my knowledge for a vacation we were going on. When I discovered he had bought me some sandals I assumed they would likely be super uncomfortable, too narrow, weird looking etc lol. I definitely didn’t give him enough credit. I absolutely love these shoes! They are incredibly comfortable! They match pretty much everything. The bow at the toes is so cute! The soles are a very cool sturdy and hard almost wood like material, while also feeling like a dream to wear. I ended up wearing them with my bathing suits, my shorts, my sundresses and even a couple of dressy outfits! I pretty much kept them on the whole vacation and ignored the 10 other pairs I wasted time and space packing. I don’t know what it is with these shoes but even o. Days we were walking really long distances at the beach or on days I was running all over the cruise boat from dusk til dawn, I never once felt uncomfortable in these and felt just the opposite in fact. I often get achey feet too; but it didn’t happen with these. Whether I was strolling the deck, dancing in the club, or standing waiting in long buffet lines, these shoes had me feeling fancy free and footloose.
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    Reviewed in the United States on May 8, 2026
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    Stefany Harms
    Cuba, US
    ★★★★★ 5
    The best sandals EVER
    Size: 8, Color: White Khaki
    These flip flops are so so so comfortable. I have bunions and a nerve problems so finding the right shoe is an issue for me. These are the most comfortable flip flops I have ever had the pleasure to wear. I cannot recommend enough how good and natural these feel. They are flexible yet supportive. So far on vacation they have walked miles with me and still in great condition. They are so naturally light weight. I will be buying again for sure
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    Reviewed in the United States on May 22, 2026

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