3D Printing InfoFilament comparison
PMMA vs TPU-CF
Compare printing settings, strength, heat resistance, dated prices and sources.
2 selected · all documented properties
| Property | PMMA (acrylic)ENGINEERING | Carbon-fibre TPUFLEX |
|---|---|---|
| Market snapshot | ||
| Listing priceUSD/kg; dated snapshots | $49.99/kg median; $49.99–$49.99/kg across 1 dated product listings | $107.05/kg median; $107.05–$107.05/kg across 1 dated product listings |
| Identity & Market | ||
| Base polymer / chemistry | Poly(methyl methacrylate) — acrylic, sold for 3D printing as a transparent glass substitute[1] | Carbon-fibre reinforced thermoplastic polyurethane at the hard end of the range[2] |
| Densityg/cm³ | Not documented | 1.22 (Extrudr FLEX HARD CF, ISO 2781)[2] |
| Typical priceUSD/kg | 1 kg spools cluster near 50[3] | 107 for the only retail listing found (Extrudr 0.5 kg coil, incl. VAT)[4] |
| Price range across brandsUSD/kg | 50 at Push Plastic's 1 kg listing; 3 kg spools run the same per kilogram[3] | One listing only: EUR 49.56 incl. VAT per 0.5 kg coil, direct from Extrudr; no reseller or second brand found[4] |
| Market availability1–5 | Special order, 1–2 makers worldwide[3] | Niche, a handful of specialist brands — Extrudr's FLEX HARD CF is the only carbon-filled flexible with a published datasheet found here[2] |
| Spool sizes & diameters | 1.75 and 2.85 mm; 1 and 3 kg spools[3] | 1.75 mm; 0.5 and 2 kg coils[4] |
| Typical applications | Transparent covers and light guides where PC's yellowing or cost rules it out[1] | Stiffened flexible parts — damping mounts and semi-rigid brackets[2] |
| Printing Parameters | ||
| Nozzle temperature°C | Not documented | 230–260 (Extrudr FLEX HARD CF)[2] |
| Bed temperature°C | Not documented | 50–90 (Extrudr FLEX HARD CF)[2] |
| Enclosure / chamber requirement1–5 | Not documented | Open frame is fine[2] |
| Bed surface & adhesion aid | Not documented | PEI sheet or painter's tape; Polymaker warns TPU can over-stick and advises a glue stick as a release agent[5][6] |
| Maximum volumetric flow (mm³/s; see test conditions)mm³/s | Not documented | 1.6–8 at the 20–100 mm/s Extrudr specifies on a 0.4 mm nozzle at 0.2 mm layer[2] |
| Overall printing difficulty1–5 | Not documented | Advanced — enclosure, hardware upgrades, tuning; hardened nozzle needed[2] |
| Hardware Wear & Reliability | ||
| Nozzle hardness required1–4 | Not documented | Hardened steel required — Extrudr marks FLEX HARD CF as needing a hardened nozzle where its unfilled FLEX grades do not[2] |
| Abrasiveness1–5 | Not documented | Highly abrasive — standard CF composite[2] |
| Nozzle clog risk1–5 | Not documented | High — jams from moisture, heat creep or particles; a flexible base plus chopped carbon fibre, which Prusa lists as a higher nozzle-clogging risk, and Extrudr requires a hardened nozzle[7][2][5] |
| Hotend requirement | Not documented | No special hot-end required, but a direct-drive extruder is (Simplify3D)[5] |
| Moisture Behaviour | ||
| Moisture absorption (hygroscopicity)1–5 | Not documented | Moderate[8] |
| Drying temperature & time | Not documented | 60 °C for 6 h (Extrudr FLEX HARD CF)[2] |
| Symptoms when wet | Not documented | Bubbling and popping at the nozzle, stringing and a rough surface[8] |
| Effect of moisture on strength | Not documented | Polymaker groups TPU with the highly hygroscopic materials; no dry-versus-conditioned figures are published[8] |
| Storage requirement | Not documented | Sealed with desiccant; often kept in a dryer during the print[8] |
| Mechanical Properties | ||
| Young's modulusMPa | Not documented | 35 (Extrudr FLEX HARD CF, ISO 527-2/5A/500)[2] |
| Elongation at break% | Not documented | 380 ultimate elongation (Extrudr FLEX HARD CF, ISO 527-2/5A/500), against 490 for the unfilled FLEX HARD[2] |
| Brittleness1–5 | Not documented | Very ductile — bends far before failing[2] |
| Hardness (scale-specific)Shore A / Shore D / Rockwell | Not documented | 70 Shore D (Extrudr FLEX HARD CF, ISO 868), against 58 Shore D for the unfilled FLEX HARD[2] |
| Creep resistance / sustained load1–5 | Not documented | Below average — no CF-grade creep test; the grade is 70 Shore D where a 95A TPU bar crept from 74.5 to 82.7 mm over 5 days at 1.25 kg[2][9] |
| Fatigue / repeated-flex resistance1–5 | Not documented | Good — 380 % ultimate elongation and a damping application set (Extrudr cites longboard wheels), below the unfilled grades[2] |
| Elasticity / flexibility1–5 | Not documented | Semi-flexible[2] |
| Wear resistance & friction | Not documented | Abrasion 26 mm³ (Extrudr FLEX HARD CF, ISO 4649-A) — the same as the unfilled FLEX HARD[2] |
| Thermal Properties | ||
| Glass transition (Tg)°C | Not documented | -24 (Extrudr FLEX HARD CF)[2] |
| Melting point / Vicat°C | Not documented | Vicat A 140 (Extrudr FLEX HARD CF, ISO 306)[2] |
| Environment & Chemical | ||
| UV resistance1–5 | Not documented | Good — years with some colour shift; Polymaker lists UV exposure among the conditions TPU withstands[6] |
| Chemical resistance | Not documented | Withstands industrial solvents and UV exposure (Polymaker)[6] |
| Food contact | Not documented | Not food safe without specific certification (Polymaker)[6] |
| Biodegradability / compostability | Not documented | Not biodegradable[6] |
| Recyclability | Not documented | Not accepted in household plastic collection[6] |
| Health & Safety | ||
| Fume toxicity1–5 | Not documented | Low hazard — minimal VOC and particle emission; TPU was not among the nine filaments in the chamber study[10] |
| Ventilation / filtration requirement1–5 | Not documented | Open a window / occasional ventilation[10] |
| Dust & fibre handling hazard | Not documented | Carbon fibre is bound in the matrix; sanding dust should not be inhaled[2] |
| Post-Processing | ||
| Sanding & machining | Not documented | Difficult to sand or smooth; Polymaker limits post-processing to trimming or tumbling[6] |
| Gluing & solvent welding | Not documented | Cyanoacrylate bonds TPU; no common solvent welds it[6] |
| Vapour / chemical smoothing | Not documented | No practical vapour smoothing[6] |
| Support material pairing | Not documented | Polymaker warns TPU supports are often very difficult to remove[6] |
| Dimensional accuracy & detail | Not documented | Tear strength 165 kN/m (Extrudr FLEX HARD CF, ISO 34-1B)[2] |
| Solvents & Solubility | ||
| Soluble in | Acetone, MEK, ethyl and butyl acetate, THF, chloroform and carbon tetrachloride dissolve it; the last two are laboratory reagents.[11] | DMF, DMSO, NMP and THF dissolve the TPU matrix and leave the fibre; ketones are partial solvents. Laboratory reagents.[12] |
| Softened or crazed by | Alcohols, aliphatic hydrocarbons, oils and phthalate plasticisers craze it, and the threshold falls as stress rises.[11] | Toluene and benzene swell it up to +50 % by weight at 23 °C; esters swell it severely; ethanol and IPA soften it.[12] |
| Solvent welding & smoothing agent | Dichloromethane acrylic cement (IPS Weld-On 3): 2–5 min soak, 17.2 MPa lap shear at one week. Controlled carcinogen.[13] | None practical — the true solvents (DMF, THF, NMP) are laboratory reagents and leave the joint swollen and weak.[12] |
Material entries describe families or representative grades, not an interchangeable specification for every spool. Test methods, orientations and conditions may differ. Unknown values are marked “Not documented”. Prices and source dates remain historical snapshots; check the linked guide for product details. Differences highlight text, not a universal winner.
Sources for this comparison
- PMMA Filament 1.75mm 1kg — product page Push Plastic · 2026-08 · vendor
- Extrudr Product Catalogue (DURAPRO PA12 data block) Extrudr · 2025-03 · tds
- Push Plastic product catalogue Push Plastic · 2026-08 · vendor
- Extrudr TPU FLEX Hard CF — product page (1.75 mm, 0.5 and 2 kg coils, price) Extrudr (FD3D GmbH) · 2026-08 · vendor
- Flexible (TPE/TPU) — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
- TPU — material basics Polymaker Wiki · 2026-08 · doc
- Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
- Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
- BambuLab TPU 95A HF vs Qidi TPU 95A HF — results spreadsheet My Tech Fun (Igor Gaspar) · 2024-02 · test
- Emissions of Ultrafine Particles and Volatile Organic Compounds from Commercially Available Desktop Three-Dimensional Printers with Multiple Filaments (Azimi et al.) Environmental Science & Technology 50(3) 1260-1268 · 2016-01 · paper
- Chemical resistance of PMMA products Mitsubishi Chemical (Acrypet) · 2026-08 · tds
- Elastollan — Chemical properties: swelling and chemical resistance BASF · 2026-08 · tds
- Weld-On 3 Acrylic Plastic Cement — technical data sheet (shipped as dichloromethane) IPS Corporation · 2002-07 · tds