3D Printing Filament Guide: PLA, PETG, ABS, TPU, Nylon, ASA, and Polycarbonate

Choosing the right filament is one of the most important decisions you’ll make for any 3D printing project. Each material has a unique combination of mechanical properties, printing requirements, and ideal use cases. In this guide we break down the seven most popular filaments — from beginner-friendly PLA to industrial-grade polycarbonate — so you can pick the right plastic for every print.

PLA (Polylactic Acid) — The Beginner’s Best Friend

PLA is the undisputed king of ease. Derived from renewable resources like corn starch, it prints at low temperatures (190–220°C nozzle, 50–60°C heated bed), rarely warps, and produces almost no odor during printing. You can print PLA on an unenclosed printer with a basic build surface like BuildTak or PEI and get excellent first-layer adhesion without glue stick or hairspray.

• Pros: Easy to print, low warping, biodegradable, wide colour selection, inexpensive ($15–25/kg), good surface finish, low odour.
• Cons: Low heat resistance (softens around 60°C), brittle — poor impact strength, degrades in direct sunlight, not suitable for functional outdoor parts.
• Best for: Decorative models, prototypes, cosplay props, tabletop miniatures, educational projects, and any print where appearance matters more than mechanical performance.

PETG (Polyethylene Terephthalate Glycol) — The All-Rounder

PETG bridges the gap between PLA’s printability and ABS’s durability. Printing at 230–250°C with a bed temperature of 70–85°C, PETG delivers strong layer adhesion and excellent chemical resistance. It is less prone to warping than ABS but more challenging than PLA — it tends to string and can stick too well to some build surfaces, potentially damaging PEI sheets if your Z-offset is too low.

• Pros: Good strength and flexibility, excellent layer adhesion, UV resistant, food-safe variants available, reasonable price ($18–30/kg).
• Cons: Stringing and oozing, hygroscopic (absorbs moisture — requires drying), glossy finish can hide layer lines but also highlight imperfections, slower retraction tuning needed.
• Best for: Functional parts, drone mounts and GoPro cages, mechanical brackets, waterproof containers, and any part that needs more toughness than PLA can offer.

ABS (Acrylonitrile Butadiene Styrene) — The Tough Classic

ABS is the workhorse of industrial 3D printing. It prints hot (240–270°C nozzle, 100–110°C bed) and absolutely requires an enclosure to prevent warping and layer splitting. The fumes are noticeable and potentially irritating, so active ventilation or a carbon filter is recommended. When printed correctly, ABS parts can be vapour-smoothed with acetone for a glossy, injection-moulded finish.

• Pros: High impact resistance, good heat resistance (up to ~98°C), acetone vapour smoothing, affordable ($15–25/kg), widely available.
• Cons: Strong warping tendency, requires enclosure, fumes during printing, poor UV resistance (becomes brittle outdoors), harder first-layer calibration.
• Best for: Automotive interior parts, printer upgrades (Voron parts are often ABS), functional prototypes, and parts that will see mechanical stress and moderate heat.

TPU (Thermoplastic Polyurethane) — Flexible and Impact-Resistant

TPU is the go-to filament for flexible parts. Available in shore hardness ratings from 85A (very flexible) to 95A and 64D (semi-rigid), TPU prints at 220–250°C with a bed temperature of 40–60°C. The key to successful TPU printing is going slow — 20–30 mm/s is typical — because the filament compresses in the extruder path. A direct-drive extruder is strongly recommended; Bowden setups struggle with the filament buckling between the extruder gear and hotend.

• Pros: Excellent impact absorption, flexible and rubber-like, good chemical resistance, great layer adhesion, abrasion resistant.
• Cons: Slow printing speeds, direct-drive extruder strongly recommended, stringing is difficult to eliminate, limited bridging performance, higher cost ($25–40/kg).
• Best for: Drone bumpers and GoPro mounts, gaskets and seals, phone cases, shoe soles, vibration dampeners, and any part that needs to flex or absorb impacts.

Nylon (Polyamide) — Strong but Demanding

Nylon is one of the strongest filaments available to consumer printers but also one of the most challenging. Printing temperatures range from 250–270°C with a bed at 70–100°C. Nylon is extremely hygroscopic — it will absorb enough moisture from the air to ruin a print within hours of being exposed. You must print from a dry box and ideally use a filament dryer during the print. Garolite (G10) build surfaces or glue stick on glass are recommended for adhesion.

• Pros: Exceptional strength and durability, high impact resistance, good chemical resistance, low friction (good for gears), semi-flexible before breaking.
• Cons: Extremely hygroscopic — mandatory drying, high printing temperatures, enclosure required for large parts, warping, expensive ($35–60/kg), requires hardened nozzle for abrasive filled variants.
• Best for: Functional gears and bearings, living hinges, drone arm skids, tool fixtures, and any part demanding extreme toughness and wear resistance.

ASA (Acrylonitrile Styrene Acrylate) — ABS’s UV-Resistant Cousin

ASA is chemically similar to ABS but with acrylate rubber replacing butadiene, giving it vastly superior UV and weather resistance. It prints at the same temperatures as ABS (240–270°C nozzle, 100–110°C bed) and shares the same enclosure requirement. If you need outdoor durability without painting or coating your part, ASA is the answer.

• Pros: Excellent UV resistance (10x better than ABS), good mechanical properties, decent heat resistance, acetone vapour smoothing possible.
• Cons: Strong warping — enclosure mandatory, fumes similar to ABS, more expensive than ABS ($25–40/kg), fewer colour options, tricky first-layer adhesion.
• Best for: Outdoor drone parts, garden fixtures, automotive exterior trim, boat accessories, and any functional part that will live in direct sunlight.

Polycarbonate (PC) — The Heavyweight Champion

Polycarbonate sits at the top of the consumer filament pyramid for strength and heat resistance. Printing at 260–300°C with a bed at 100–120°C, PC demands a high-temperature hotend (all-metal), a well-sealed enclosure, and often a heated chamber to prevent warping. Pure PC is extremely strong but brittle; PC blends (PC-ABS, PC-PBT) offer an improved balance of strength and toughness with slightly easier printing.

• Pros: Exceptional strength and impact resistance, very high heat deflection temperature (~110–130°C), flame retardant grades available, optically clear variants exist.
• Cons: Very difficult to print — high warping, requires 300°C-capable hotend and enclosure, hygroscopic — requires thorough drying, expensive ($35–70/kg), abrasive on brass nozzles.
• Best for: Structural drone components, high-temperature mounts near motors, protective enclosures, moulds, and any application demanding maximum strength and heat tolerance.

Filament Comparison at a Glance

Filament	Nozzle Temp	Bed Temp	Difficulty	Strength	Heat Resistance	UV Resistance	Price/kg
PLA	190–220°C	50–60°C	Easy	Medium	Low	Low	$15–25
PETG	230–250°C	70–85°C	Moderate	Good	Medium	Good	$18–30
ABS	240–270°C	100–110°C	Hard	Good	Good	Poor	$15–25
TPU	220–250°C	40–60°C	Moderate	Flexible	Low	Varies	$25–40
Nylon	250–270°C	70–100°C	Hard	Excellent	Good	Moderate	$35–60
ASA	240–270°C	100–110°C	Hard	Good	Good	Excellent	$25–40
PC	260–300°C	100–120°C	Very Hard	Excellent	Excellent	Good	$35–70

Most hobbyists will find that PLA and PETG cover 90% of their printing needs. Add TPU for flexible drone parts and ASA for outdoor projects, and you have a well-rounded filament library. Save nylon and polycarbonate for the projects that truly demand their extreme properties — and make sure your printer is properly upgraded before attempting them.