Bambu Lab PPS-CF Filament 1.75mm 750g

Carbon-fibre reinforced polyphenylene sulfide — a specialist high-performance plastic used where nothing else will survive. It resists acids, alkalis, organic solvents, oils and greases, is flame retardant, holds its shape to 235°C under load, and absorbs almost no water at all.

This is chemical-plant, aerospace and under-bonnet territory: pump components, sensor housings, connectors, parts that live in hot oil or solvent.

Check your printer can do this before ordering. Bambu support PPS-CF on the H2D, H2S and H2C only — it is not supported on the P1 or P2 series, or the A1. It needs 310–340°C at the nozzle and a 60–90°C chamber. If your machine tops out at 300°C this material will not print. Talk to us before ordering if you're unsure.

Feed it from an external spool holder — the AMS series is not compatible. Use a hardened steel or high-flow nozzle, 0.6mm recommended; Bambu advise against the 0.4mm high-flow.

At a glance

What it's actually for

Chemical resistance is the headline. Alone in our whole range, PPS-CF is listed as resistant to acids, alkalis, organic solvents and oils and greases. Every other material we sell fails at least one of those.

Heat. Heat deflection 235°C, Vicat softening 268°C. PPA-CF, our next best, is 196°C.

Humidity does nothing to it. Water absorption is 0.05%, the lowest of anything we stock by a factor of seven — and in Bambu's dry-versus-humid testing PPS-CF is the only material whose figures do not move at all: bending strength stays at 142 MPa and stiffness at 7160 MPa. PA6-CF loses 37% of its bending strength over the same test.

Flame retardant and self-extinguishing away from a flame source.

What you give up

It is brittle. Breaking elongation is 1.2% — the lowest of anything we sell, meaning it barely deforms before it fails. Notched impact is 6.2 kJ/m². Across layers it is worse again: 24 MPa tensile against 87, and impact of just 2.8 kJ/m².

Tensile strength at 87 MPa is also below PPA-CF's 168 and PA6-CF's 102. You are not buying this for strength — you are buying it for chemical and thermal survival. If the part needs to be strong and tough rather than chemically inert, PPA-CF is the better material and easier to print.

Worth knowing

Glue stick is required, and the Cool Plate SuperTack is not compatible.

A hotter chamber and nozzle measurably improve results. Bambu's published figures were taken at 60°C chamber and 320°C nozzle; they note that 90°C and 335°C give better properties, particularly across layers. If your machine allows it, use it.

The cardboard spool is rated to 145°C so the whole reel can go in the dryer at 100–140°C.

Annealing runs hot: 180–220°C for 6 to 12 hours. Bambu warn that toughness can decrease, and this material has little to spare — test first.

A note on fumes: thermal decomposition products include sulfur dioxide and sulfides. Print with the enclosure closed and the room well ventilated, and don't let it cook in a jammed nozzle.

Bambu's usage guide for the carbon-fibre grades covers printer support, feeding, drying and the dry-versus-humid data in full: PET-CF / PPA-CF / PPS-CF / PA6-CF Usage Guide