3D Printing InfoFilament comparison
PMMA vs PP
Compare printing settings, strength, heat resistance, dated prices and sources.
2 selected · all documented properties
| Property | PMMA (acrylic)ENGINEERING | Polypropylene (PP)POLYOLEFIN |
|---|---|---|
| Market snapshot | ||
| Listing priceUSD/kg; dated snapshots | $49.99/kg median; $49.99–$49.99/kg across 1 dated product listings | $46.56/kg median; $31.99–$53.00/kg across 4 dated product listings |
| Identity & Market | ||
| Base polymer / chemistry | Poly(methyl methacrylate) — acrylic, sold for 3D printing as a transparent glass substitute[1] | Polypropylene — a semi-crystalline polyolefin with no polar groups, so it neither absorbs water nor bonds to most bed surfaces[2][3] |
| Densityg/cm³ | Not documented | 0.91 (Prusa PP composite, ISO 1183) — the lightest common filament[4] |
| Typical priceUSD/kg | 1 kg spools cluster near 50[5] | 1 kg-equivalent spools span 27–53; the middle of the market is about 44[6][7][8][9] |
| Price range across brandsUSD/kg | 50 at Push Plastic's 1 kg listing; 3 kg spools run the same per kilogram[5] | 27–53 across brands; Reli3D 32 on Amazon, SUNLU 44 at 0.8 kg, Fiberlogy 49 at 750 g, IEMAI 3D 53, and the 3DJake PP listing spans 27–49[6][10][7][8][9] |
| Market availability1–5 | Special order, 1–2 makers worldwide[5] | Available from several mainstream brands[10][7][6] |
| Spool sizes & diameters | 1.75 and 2.85 mm; 1 and 3 kg spools[5] | 1.75 and 2.85 mm; 0.75 kg spools are common[7] |
| Typical applications | Transparent covers and light guides where PC's yellowing or cost rules it out[1] | Living hinges, chemical-resistant containers, automotive clips and packaging prototypes[2] |
| Printing Parameters | ||
| Nozzle temperature°C | Not documented | 210–230 (Braskem-type PE/PP window); Formfutura's Centaur PP melts at 205 ± 15 °C[2] |
| Enclosure / chamber requirement1–5 | Not documented | Enclosure recommended — Simplify3D lists an enclosure as a hardware requirement and Polymaker advises one below 70 °C ambient to stop warping and cracking[11][3] |
| Part cooling fan | Not documented | Part cooling fan required (Simplify3D)[11] |
| Bed surface & adhesion aid | Not documented | Packing tape, a polypropylene sheet, or a PP-specific adhesive such as Magigoo PP — ordinary PLA and ABS adhesives do not hold it[11][3] |
| Warping tendency1–5 | Not documented | High — enclosure needed for reliable large parts; PP's crystallinity drives shrinkage and Prusa recommends a brim on its PP grades[4][12] |
| Bed-adhesion difficulty1–5 | Not documented | Very difficult — special plates or slurry required. PP bonds to almost nothing; a polypropylene-specific tape or adhesive is the normal answer[4][3] |
| Stringing / oozing tendency1–5 | Not documented | Slight — Polymaker advises 1–2 mm retraction at 20–30 mm/s[3] |
| Overall printing difficulty1–5 | Not documented | Advanced — enclosure, hardware upgrades, tuning; bed adhesion is the whole problem[3][4] |
| Hardware Wear & Reliability | ||
| Nozzle hardness required1–4 | Not documented | Brass fine indefinitely for unfilled grades — Simplify3D states no special hotend is required[11] |
| Abrasiveness1–5 | Not documented | Non-abrasive when unfilled[11] |
| Nozzle clog risk1–5 | Not documented | Low — Simplify3D lists no special hotend requirement for PP and clogging is not among its listed drawbacks[13][11] |
| Heat-creep / jam sensitivity1–5 | Not documented | Slightly sensitive[11] |
| Hotend requirement | Not documented | No special hot-end required (Simplify3D)[11] |
| Moisture Behaviour | ||
| Moisture absorption (hygroscopicity)1–5 | Not documented | Negligible (<0.1 % EMC) — Prusa measures 0.03 % in 24 h and 0.04 % in 7 days on its PP composite, the lowest figures it publishes for any filament[4] |
| Equilibrium moisture content at ~50 % RH% | Not documented | 0.03 after 24 h and 0.04 after 7 days at 24 °C / 22 % RH (Prusa Polymers, measured on its PP composite)[4] |
| Drying temperature & time | Not documented | No drying step is published for PP; uptake is below the level that affects printing[4] |
| Symptoms when wet | Not documented | Bubbling and popping at the nozzle; Polymaker still advises a 70 °C dry for 4–6 h despite the low uptake[3] |
| Effect of moisture on strength | Not documented | Not applicable in practice — with equilibrium uptake at 0.04 %, there is no moisture-driven strength loss to measure. Polymaker's sensitivity tiers put polyolefins below even PLA[4][13] |
| Storage requirement | Not documented | No special storage needed[4] |
| Mechanical Properties | ||
| Tensile strength (XY)MPa | Not documented | 12 at yield (Formfutura Centaur PP, ASTM D638)[2] |
| Young's modulusMPa | Not documented | 724 on extruded PP stock (ASTM D638; converted from 105,000 psi)[14] |
| Elongation at break% | Not documented | Above 600 at break (Formfutura Centaur PP, ASTM D638)[2] |
| Flexural strengthMPa | Not documented | 31.0 on extruded PP stock (ASTM D790; converted from 4500 psi)[14] |
| Flexural modulusMPa | Not documented | 402 flexural modulus (Formfutura Centaur PP, ASTM D790) — an order of magnitude below any rigid filament[2] |
| Other impact data | Not documented | Izod notched 112 J/m on extruded PP stock, converted from 2.1 ft-lb/in (ASTM D256)[14] |
| Brittleness1–5 | Not documented | Very ductile — bends far before failing[2] |
| Hardness (scale-specific)Shore A / Shore D / Rockwell | Not documented | Rockwell R102 (and M95) on extruded PP stock (ASTM D785)[14] |
| Creep resistance / sustained load1–5 | Not documented | Below average[2] |
| Fatigue / repeated-flex resistance1–5 | Not documented | Excellent — living hinges viable, the classic polypropylene application[2] |
| Elasticity / flexibility1–5 | Not documented | Semi-flexible[2] |
| Thermal Properties | ||
| HDT at 0.45 MPa°C | Not documented | 74 on extruded PP stock (ASTM D648 at 66 psi; converted from 165 °F)[14] |
| Melting point / Vicat°C | Not documented | 205 ± 15 melting (Formfutura Centaur PP)[2] |
| Continuous service temperature°C | Not documented | Bounded by a melting point of 205 ± 15 °C and by the 158 °C heat deflection of the carbon-filled grade; no loaded-bar service figure is published for unfilled PP[2][4] |
| Flammability / UL 94 | Not documented | Flammable; no UL 94 rating published for the grades surveyed[4] |
| Environment & Chemical | ||
| UV resistance1–5 | Not documented | Months outdoors before embrittlement — unstabilised polypropylene chalks under UV[3] |
| Chemical resistance | Not documented | Excellent against acids, alkalis and most solvents — the usual reason to choose PP[3] |
| Water / humidity resistance in service1–5 | Not documented | Excellent — essentially unaffected[4] |
| Food contact | Not documented | Polypropylene is a common food-packaging polymer, but no filament here carries a food-contact certification[3] |
| Biodegradability / compostability | Not documented | Not biodegradable[3] |
| Recyclability | Not documented | Mechanically recyclable as resin code 5, but printed waste is not accepted in household collection[3] |
| Health & Safety | ||
| Fume toxicity1–5 | Not documented | Low hazard — minimal VOC and particle emission. Inferred: no polyolefin was among the nine filaments in the Azimi chamber study, so this is a family-level judgement rather than a measurement[15] |
| Ventilation / filtration requirement1–5 | Not documented | Open a window / occasional ventilation. Inferred — no polyolefin was measured in the chamber study[15] |
| Post-Processing | ||
| Sanding & machining | Not documented | Sands poorly — the waxy surface loads abrasive paper[11] |
| Painting & finishing | Not documented | Paint and adhesives do not key to untreated PP; flame or plasma treatment is normally needed first[3] |
| Gluing & solvent welding | Not documented | Nothing common bonds untreated PP; flame or plasma treatment is needed before adhesives key[3] |
| Vapour / chemical smoothing | Not documented | No practical vapour smoothing[11] |
| Support material pairing | Not documented | Prints its own supports; no soluble support is rated for PP[11] |
| Dimensional accuracy & detail | Not documented | Shrinkage and warping dominate; the low modulus means parts flex rather than hold tolerance[4] |
| Solvents & Solubility | ||
| Soluble in | Acetone, MEK, ethyl and butyl acetate, THF, chloroform and carbon tetrachloride dissolve it; the last two are laboratory reagents.[16] | None at room temperature; chloroform dissolves it at 60 °C and xylene at about 118 °C — the xylene-solubles route.[17][18] |
| Softened or crazed by | Alcohols, aliphatic hydrocarbons, oils and phthalate plasticisers craze it, and the threshold falls as stress rises.[16] | Xylene, decalin, CCl4 and chlorobenzene are heavily absorbed at 20 °C; oleum, chlorosulphonic acid and bromine destroy it.[17] |
| 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.[19] | None — nothing softens PP at room temperature, so joints have to be welded thermally rather than chemically.[17] |
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
- Centaur PP Technical Data Sheet Formfutura · 2026-08 · tds
- PP — material basics Polymaker Wiki · 2026-08 · doc
- Prusament PP Carbon Fiber Technical Datasheet v1.0 Prusa Polymers · 2024-11 · tds
- Push Plastic product catalogue Push Plastic · 2026-08 · vendor
- SUNLU product catalogue SUNLU · 2026-08 · vendor
- Fiberlogy PP Natural — product page 3DJake International · 2026-08 · vendor
- Reli3D Low Warp PP Filament 1.75 mm 1 kg Black — Amazon listing Amazon.com · 2026-08 · vendor
- IEMAI 3D PP 3D Printing Filament — store page IEMAI 3D · 2026-08 · vendor
- PP filament listing 3DJake International · 2026-08 · vendor
- Polypropylene — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
- Prusament PP Glass Fiber Technical Datasheet v1.0 Prusa Polymers · 2024-11 · tds
- Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
- TECAFINE PP natural — stock shape properties Ensinger · 2026-08 · tds
- 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
- Pro-fax and Moplen polypropylene — Chemical Resistance Guide (20, 60 and 100 °C) LyondellBasell · 2026-08 · tds
- US 5,278,282 Polymer recycling by selective dissolution — xylene dissolution temperatures Nauman & Lynch, Rensselaer Polytechnic Institute · 1994-01 · paper
- Weld-On 3 Acrylic Plastic Cement — technical data sheet (shipped as dichloromethane) IPS Corporation · 2002-07 · tds