Bio-nylon

01Overview and value chain

Markers: [EC: EU REACH polymer registration / ISO 16620 bio-based content | OECD: Bio-based materials | Regulator: EPA (USA), REACH (EU)]

Bio-nylon is the family of bio-based polyamide polymers and fibres whose monomers come from renewable carbon instead of crude oil. Four routes are in play: the long-established castor PA11 line (Arkema Rilsan), where castor-oil ricinoleic chain is cut to 11-aminoundecanoic acid and polycondensed to a 100%-bio polyamide; the bio-pentanediamine PA56/PA510 route, where sugars are fermented to pentanediamine and reacted with a bio-diacid; the emerging plant-based nylon-6 route (Geno/Genomatica, with Sojitz partnering since October 2025 to accelerate commercialisation); and fully bio-based PA66, where Toray and PTT Global Chemical established a manufacturing technology in May 2026 that ferments starch residues to bio-muconic acid, then bio-adipic acid, and on to 100% bio-based nylon-66. The result is a drop-in nylon with a 50–100% renewable-carbon content and a far lower carbon footprint — Arkema reports ~1.3 kg CO₂e/kg for global PA11 production versus ~6–8 kg CO₂e/kg for fossil PA66. This article owns the polymer and fibre producers; the upstream bio-diamine and long-chain-diacid monomer houses (Cathay Biotech) are tabled elsewhere and are named here only to mark the scope boundary.

Key directions of bio-nylon:

1. Castor-based PA11 & long-chain bio-polyamides (Castor PA11): the 100%-bio-carbon line from castor oil, in commercial production for decades (Arkema Rilsan PA11).
2. Bio-pentanediamine PA56 / PA510 route (Bio-Pentanediamine PA56): fermentation-derived pentanediamine reacted with a bio-diacid; the monomer houses feeding it are tabled elsewhere. Alongside it runs Geno’s plant-based nylon-6 route, still pre-commercial.
3. Bio-PA66 from bio-adipic acid / bio-HMDA (Bio-Adipic PA66): drop-in fully bio-based nylon-66 (the Toray–PTT GC bio-muconic → bio-adipic acid technology, established 2026 and not yet in commercial production).
4. Bio-nylon textile yarn & fibre (Bio-Nylon Fibre Spinning): melt-spinning bio-PA into yarn and staple fibre for apparel and technical textiles (Fulgar EVO castor yarn; Toray renewable-feedstock nylon fibre).

Sectoral value chain

[castor / sugars] ──> [bio-monomer] ──> [polycondensation] ──> [PA chip]
                            │                                        │
                    (fermentation)                            (melt-spinning)
                            │                                        │
                            ▼                                        ▼
[textile / apparel] <─── [yarn & fibre] <────────────── [compounding]

Value chain levels

Cross-cutting technologies of the sector:

• Castor-to-PA11 chemistry (Castor-to-PA11): ricinoleic-chain cleavage to 11-aminoundecanoic acid and polycondensation to 100%-bio PA11.
• Fermentation diamine route (Bio-Diamine Fermentation): engineered-strain fermentation of sugars to pentanediamine for PA56/PA510.
• Bio-nylon melt-spinning (Bio-Nylon Melt-Spinning): spinning bio-PA chip into textile-grade yarn and staple fibre.

02US

The US anchors the fermentation-monomer-to-nylon route, licensing the bio-diamine process that polymer and fibre producers convert into nylon.

plant-based nylon-6 route, monomer licensing, Sojitz partnership

• Genomatica (Geno): holds the process technology for the world’s first plant-based nylon-6, made from renewable rather than fossil caprolactam; a partnership with Sojitz announced in October 2025 is intended to accelerate its commercialisation. The route is not yet in commercial production.
• TSCA / EPA: the bio-monomer intermediates fall under TSCA new-chemical review, the regulatory gate for scaling the plant-based route domestically.
• Brand pull: apparel brands pull renewable-carbon nylon yarn into commercial collections — Goldwin, Neste, Idemitsu Kosan and Toray established a supply chain for nylon fibre from used cooking oil for THE NORTH FACE products, evidencing downstream demand.

03CN

China’s bio-nylon is dominated downstream by PA56, but the lead producer sits in a sibling article — this article states the boundary rather than re-tabling the monomer house.

PA56 fibre, Cathay boundary, domestic nylon

• Scope boundary — Cathay Biotech: China’s bio-PA56 (pentanediamine + sebacic/adipic acid, the Terra-/Waylung-line polymers) is led by Cathay Biotech, which is tabled in the bio-based-polyols and biosynthetic-specialty-chemicals articles for the monomer line; it is deliberately not re-tabled here.
• Domestic nylon fibre producers: Chinese nylon-fibre converters draw on the bio-PA56 polymer for textile and industrial yarn, a growing rather than consolidated bio-nylon fibre segment.
• Standards: national bio-based-content and polymer standards (mirroring ISO 16620) frame how a Chinese bio-nylon grade evidences renewable carbon.

04EU

The EU is the centre of commercial castor-PA11 and bio-nylon yarn, with the lowest-carbon polymer grades and the established textile-yarn converters.

castor PA11, bio-nylon yarn, low-carbon polymer

• Arkema (Rilsan PA11): the long-established 100%-castor polyamide, reported at ~1.3 kg CO₂e/kg for global production, extended into a Gen2 bio-based PA11 for advanced additive manufacturing.
• Fulgar (EVO®): Italian yarn producer selling a castor-oil-based bio-polyamide yarn (EVO®) into apparel and activewear, alongside its Q-NOVA® recycled PA6.6 line.
• REACH & ISO 16620: polymer registration under REACH and bio-based-carbon determination to ISO 16620 are how an EU bio-nylon grade evidences its renewable content to a buyer.

05Leading companies and research institutes

06Tech stack and innovations

The stack is built on castor PA11 chemistry, fermentation diamine routes and bio-nylon melt-spinning.

1. Castor PA11 & long-chain bio-polyamides (Castor PA11):
   • castor-oil ricinoleic chain cleaved to 11-aminoundecanoic acid and polycondensed to 100%-bio PA11.
   • case: Arkema Rilsan PA11 at ~1.3 kg CO₂e/kg, extended to a Gen2 bio-based PA11 for additive manufacturing.
2. Bio-pentanediamine / bio-adipic PA56 & PA66 routes (Bio-Diamine/Diacid PA):
   • sugars fermented to pentanediamine (and bio-HMDA) and reacted with a bio-diacid for PA56/PA510 or drop-in PA66.
   • case: Geno’s plant-based nylon-6 with the October 2025 Sojitz commercialisation partnership; the Toray–PTT GC 100% bio-based nylon-66 technology.
3. Bio-nylon fibre melt-spinning (Bio-Nylon Fibre Spinning):
   • bio-PA chip melt-spun to textile-grade yarn and staple fibre for apparel and technical textiles.
   • case: Fulgar EVO® castor yarn; Toray renewable-feedstock nylon fibre for THE NORTH FACE.

07Value chains and production pipelines

Industrial pipeline of bio-nylon polymer & fibre (ISO 16620 bio-based content)

┌───────────────────────────┐      ┌───────────────────────────┐
│ 1. Castor / sugar feed    │ ───> │ 2. Bio-monomer synthesis  │
└───────────────────────────┘      └───────────────────────────┘
                                                  │
                                                  ▼
┌───────────────────────────┐      ┌───────────────────────────┐
│ 4. Chip & compounding     │ <─── │ 3. Polycondensation       │
└───────────────────────────┘      └───────────────────────────┘
               │
               ▼
┌───────────────────────────┐      ┌───────────────────────────┐
│ 5. Fibre & yarn spinning  │ ───> │ 6. Textile conversion     │
└───────────────────────────┘      └───────────────────────────┘

Stage 1: Castor / sugar feed

Castor oil (for the PA11 line) or fermentable sugars (for the PA56/PA510/PA66 lines) are received as the renewable-carbon feedstock.

Stage 2: Bio-monomer synthesis

Castor oil is chain-cleaved to 11-aminoundecanoic acid, or sugars are fermented to pentanediamine / bio-HMDA and a bio-diacid, giving the nylon monomers.

Stage 3: Polycondensation

The diamine and diacid (or aminoundecanoic acid) are polycondensed to a bio-polyamide resin — PA11, PA56/PA510 or PA66.

Stage 4: Chip & compounding

The resin is pelletized and compounded to a nylon grade with the target renewable-carbon content (evidenced per ISO 16620).

Stage 5: Fibre & yarn spinning

The chip is melt-spun to textile-grade yarn and staple fibre, or retained as engineering-polymer chip for technical and additive-manufacturing uses.

Stage 6: Textile conversion

The bio-nylon yarn is knitted or woven into fabric and apparel, closing the loop from renewable carbon to finished textile.