Filamentive rPA12: Nylon Filament Made from Recycled MJF Powder Waste

From Industrial Waste to Desktop Filament

UK-based Filamentive has launched rPA12, a nylon 12 filament manufactured from 100% recycled Multi Jet Fusion (MJF) powder waste. It's a significant step toward closing the loop on industrial additive manufacturing scrap.

The Problem with MJF Powder

HP's Multi Jet Fusion technology is increasingly popular for production-scale polymer parts, but it generates significant waste. After each print cycle, the unfused powder is refreshed with fresh material, but a portion becomes too degraded to reuse and ends up as industrial waste.

For large MJF service bureaux, this can mean tonnes of nylon powder heading to landfill annually. Filamentive saw an opportunity to divert this waste stream into the FDM/FFF filament market.

What is rPA12?

The new filament is made from PA12 (nylon 12), the same material used in HP's MJF systems. Key specifications:

• 100% recycled content — no virgin material blended in
• Compatible with standard FDM printers — prints at 250-270°C, bed 80-100°C
• Industrial-grade properties — chemical resistance, low moisture absorption, good layer adhesion
• Available in 1.75mm and 2.85mm — suits most desktop and industrial FFF systems

Sustainability Angle

Filamentive has built its brand on sustainable materials. The company previously launched rPET (from recycled bottles), rPLA, and rABS. rPA12 extends this philosophy to industrial-to-desktop recycling.

The environmental benefit is twofold:

1. Diverts waste from landfill — MJF powder that would otherwise be discarded gets a second life
2. Reduces virgin material demand — each spool of rPA12 displaces demand for new nylon production

The company claims the material has up to 70% lower carbon footprint than virgin PA12 filament.

Printability and Applications

PA12 is known for being easier to print than PA6 (nylon 6) due to its lower moisture absorption and reduced warping tendency. Filamentive recommends:

• Nozzle: 250-270°C (hardened steel recommended for abrasive wear)
• Bed: 80-100°C with glue stick or Magigoo
• Enclosure: Recommended to reduce warping and improve layer adhesion
• Drying: Dry at 70°C for 4-6 hours before printing (nylon is hygroscopic)

Applications include functional prototypes, mechanical parts, gears, and tooling — anywhere the toughness and chemical resistance of nylon is needed.

Price and Availability

rPA12 is available now from Filamentive's website and authorised UK distributors. Pricing is competitive with mid-range nylon filaments, making sustainability cost-neutral for users already printing with nylon.

Why This Matters

For desktop and prosumer users, rPA12 offers access to industrial-grade material at consumer-friendly prices, with the added benefit of environmental credibility. For service bureaux running MJF systems, it creates a potential revenue stream from what was previously a disposal cost.

The launch also highlights a growing trend: waste streams from one AM technology becoming feedstock for another. As sustainability pressures increase across manufacturing, expect more cross-pollination between industrial and desktop material ecosystems.