Opened filament cannot be returned for change of mind. Filament is hygroscopic — drying before use is recommended. Suspected manufacturing defects are assessed via our support ticket and replaced if confirmed. See our Returns, Refunds & Warranty policy and Warranty page for full details.
QIDI PPS-GF20 is a polyphenylene sulfide (PPS) filament reinforced with 20% glass fibre for rigid, dimensionally stable engineering parts. It combines electrical insulation, chemical resistance and high heat-deflection performance for suitable automotive, electronics and industrial applications.
Supplied: one 750 g spool of grey, 1.75 mm filament on a cardboard spool with an RFID chip, in vacuum aluminium-foil packaging. Printed demonstration parts shown in product images are not included.
Printer requirements
This is a high-temperature, abrasive engineering filament, not a general-purpose material for most desktop printers. Use a printer with a hot end rated for the selected 310–350°C printing temperature and an abrasion-resistant nozzle. Confirm the complete printer and filament-feed setup is suitable before use.
Recommended nozzles: hardened steel in 0.4 or 0.6 mm; bimetal or tungsten-carbide bimetal in 0.4, 0.6 or 0.8 mm, as listed by QIDI.
Not recommended: brass/copper-plated nozzles or any 0.2 mm nozzle.
QIDI BOX: QIDI lists compatibility and recommends an ABS spool adapter on the cardboard spool to help prevent rotation problems during material ejection. RFID parameter identification requires compatible QIDI equipment; it does not establish a printer's thermal capability.
Material performance
Heat deflection temperature: 236.3°C at 0.45 MPa, or 125.8°C at 1.8 MPa, tested to ISO 75. These are load-dependent HDT measurements, not continuous operating-temperature ratings.
Flame retardancy: QIDI reports UL94 V-0 at 1.5 mm. This does not certify every finished printed part or guarantee suitability for safety-critical applications.
Electrical insulation: dielectric strength 6.05 kV/mm; dielectric constant 2.71 at 1 MHz, according to the TDS.
Chemical resistance: QIDI reports resistance to many acids, alkalis, oils, solvents, hot water and steam. Strong oxidising acids such as nitric acid, hot concentrated sulphuric acid and chromic acid, and certain solvents such as nitrobenzene and aniline, are limited-resistance/not-recommended exposures. Validate the actual chemical, concentration, temperature and exposure duration for the application.
Technical specifications — QIDI TDS V1.0
Diameter / net weight / colour: 1.75 mm / 750 g / grey
Density: 1.36 g/cm³ at 23°C
Melt index: 2–7 g/10 min at 300°C / 5 kg
Water absorption: 0.11% at 23°C / 70% RH (ISO 62, injection-moulded sample)
These are typical manufacturer test values, not guaranteed design limits. Print orientation, processing, part geometry and service conditions affect performance. Validate the finished part for its intended use.
Printing and drying — TDS reference settings
Nozzle: 310–350°C
Build plate: 80–90°C
Chamber: room temperature, as specified in the TDS
Part-cooling fan: off
Print speed: up to 250 mm/s in the TDS; tune for the printer, geometry and required quality rather than treating this as a guaranteed operating speed
Drying: 100°C for 10 hours in suitable temperature-controlled drying equipment
Storage: keep sealed with effective desiccant during printing and when not in use
OEM guidance note: QIDI's product-page table and spool imagery list 300–350°C nozzle, 80–100°C bed and 20–150 mm/s; the page gives drying at 100°C for 8–10 hours. The settings and numerical properties above use QIDI's PPS-GF20 TDS V1.0 as the primary reference where its values differ from the marketing page. Use an appropriate material profile and tune for your equipment.
Annealing and handling
QIDI recommends annealing at 130°C for 10 hours to improve mechanical properties and thermal stability. Annealing can warp or deform parts, especially large or thin prints; assess dimensional changes before treating finished components. Use suitable equipment providing uniform temperature, not a microwave or household food oven.
