Europe's Nylon 66 Prices Climb as Hormuz Crisis Squeezes Ammonia and Sulphur Supply

European producers of nylon 66 and nylon 6 are operating under intensifying supply pressure in May 2026, with the price spread between the two polyamides widening as upstream feedstock availability tightens. Industry analysts have linked the constraints to the ongoing disruption of ammonia, sulphur, and natural gas flows from the Persian Gulf following the closure of the Strait of Hormuz in late February 2026.

The Iran war that began on February 28, 2026 has removed more than 20 percent of global ammonia trade from the market, according to CRU Group estimates. Ammonia and sulphur shipments from Saudi Arabia, Qatar, the United Arab Emirates, Bahrain, and Iran have been severely affected. Around 33 percent of globally traded fertilisers, including sulphur and ammonia, normally transit through the Strait of Hormuz. Damage to Iran's South Pars gas field has reduced approximately 12 percent of national gas output, further curtailing Iranian ammonia and urea production.

These upstream disruptions have rippled through the polyamide value chain. Caprolactam, the key feedstock for nylon 6, requires ammonia and sulphur via oleum. Nylon 66 production depends on adipic acid and HMDA, which in turn draw on benzene and cyclohexane derived from oil refining. Higher European natural gas prices, with the TTF reference rising from around 32 to nearly 52 euros per megawatt hour since the start of the conflict, have lifted production costs across the chain.

Industry reporting on May 15, 2026 indicated that European nylon supply remained broadly balanced in April and into early May, but market participants increasingly view this equilibrium as fragile. Tightness in cyclohexane, combined with the global shortage of sulphur and ammonia, has raised concerns about caprolactam production in the coming months. Producers face a challenging cost environment with limited visibility on near-term stabilisation.

The two grades of nylon (nylon 6 and nylon 66) are responding differently to the squeeze.

Although they share a similar name, nylon 6 and nylon 66 differ significantly in performance and end-use positioning. Nylon 66 offers a higher melting point of around 265 degrees Celsius compared to 220 degrees Celsius for nylon 6, along with superior tensile strength, rigidity, and dimensional stability. These properties make it the preferred choice for demanding applications such as under-the-hood automotive parts, electrical connectors, gears, and airbag fabrics. Nylon 6 is easier to process, absorbs slightly more moisture, and offers a softer feel that suits textiles, carpets, food packaging films, and less thermally stressed components. The two grades are only partially interchangeable. In high-temperature or load-bearing applications, nylon 66 cannot be easily substituted by nylon 6 without redesign, which is one reason European converters have absorbed the recent price increases rather than switching grades.

Nylon 66 prices have firmed more sharply due to the tighter upstream chain on adipic acid and HMDA, where global capacity is concentrated among a handful of producers including Ascend Performance Materials, Invista, Butachemie, and BASF. With limited spare capacity worldwide and no quick substitution options, European converters have absorbed higher costs.

Nylon 6 availability has been partially cushioned by rising Chinese imports. China's nylon 6 production relies heavily on coal-based ammonia, with an estimated 70 to 80 percent of Chinese nitrogen capacity using coal rather than natural gas as feedstock. This structural advantage has shielded Chinese producers from the gas price shock affecting European competitors, allowing them to export surplus material into Europe at competitive prices. The Chinese supply has eased nylon 6 availability in the region but has not been sufficient to close the widening spread with nylon 66.

The price divergence between the two grades has reached levels not seen in recent years. Earlier in 2026, the persistent premium for European nylon 66 over nylon 6 ranged between 500 and 1,000 dollars per tonne, reflecting both cost disadvantages and value positioning. The May 2026 widening reflects an acute supply imbalance rather than a structural shift, but it is expected to influence procurement decisions across downstream sectors.

Automotive manufacturers, which use nylon 66 extensively for engineering components such as air intake manifolds, radiator end tanks, and electrical connectors, are among the most exposed downstream buyers. Textile producers, electronics manufacturers, and packaging converters also face higher input costs. Some buyers have begun exploring substitution strategies, including partial reformulation toward nylon 6 grades where technical specifications permit, although this is constrained by performance requirements in high-temperature applications.

The crisis has also exposed Europe's structural vulnerability in nylon production. European producers have faced higher energy and production costs for several years, with a gradual restructuring and capacity reductions throughout the supply chain. The current upstream squeeze adds a new layer of stress to an already constrained industry.

Looking ahead, market participants are watching several factors. The duration of the Hormuz disruption remains the most important variable, as a prolonged closure would deepen the ammonia and sulphur shortages and likely trigger caprolactam production cuts in Europe. The pace of Chinese export growth will determine how much relief reaches the nylon 6 segment. Producer maintenance schedules and any unplanned outages at European caprolactam, adipic acid, or HMDA facilities could rapidly tip the regional balance into deficit.

For now, the European nylon market is described as supplied but vulnerable, with the price spread reflecting the differential exposure of the two grades to the cascading effects of the Hormuz crisis.