Strait of Hormuz crisis drives up polyester costs, textile mills cut output

When a tanker gets stopped in the Strait of Hormuz, a polyester filament factory in Keqiao feels it within weeks. That's not hyperbole—it's the physics of a global supply chain built on oil-based feedstocks. The current crisis around Hormuz isn't making headlines in textile trade media for nothing. Crude spikes hit naphtha, naphtha hits PX, PX hits PTA, and suddenly your greige fabric costs 30% more than it did last month. But here's the part that really matters for procurement managers: the pain isn't just in price—it's in availability. And textile mills, with no pricing power, are caught in the middle.

How Hormuz Hits Polyester: The Price Chain

The Strait of Hormuz is the world's most critical oil chokepoint. About 20% of global crude passes through it daily. When tensions escalate—as they have consistently through 2025-2026—shipping costs spike, insurance premiums rocket, and traders hoard barrels. The result? Crude oil pushing past $100/barrel, as the UN projected in May 2026 (UN World Economic Situation and Prospects).

Every downstream petrochemical product follows. Polyester (PET) starts from PTA (purified terephthalic acid) and MEG, both derived from naphtha. The price surge hits all along the chain. Here's what actually happened in Chinese markets, the world's biggest polyester producer (source: industry monitoring data from 21 Economic Herald and Keqiao market reports):

• Polyester filament (POY) rose from around ¥7,180/ton in March 2026 to ¥9,300/ton by mid-April—a 29.5% jump.
• Nylon (polyamide) saw multiple varieties post week-on-week gains exceeding 6%, with some grades surging ¥2,000/ton in a single day.
• Spandex and other synthetic fibers followed, with organic silicon products also up sharply (Wacker Chemical announced price increases on ~2,800 silicone items).

For a typical polyester fabric with 150D yarn content, the raw material cost share jumps from around 40% to nearly 55% in a matter of weeks. That's a margin killer for any mill that didn't hedge or stockpile.

PTA Plant Shutdowns Compound the Problem

What makes this crisis different from a normal cyclical upswing is the simultaneous supply crunch on the PTA side. China's PTA industry entered a concentrated maintenance season in April 2026. Major producers—led by big names like Hengli, Rongsheng, and Tongkun—took units offline for scheduled turnarounds. According to industry data from the Sipai Network (a textile monitoring platform), total capacity affected by shutdowns or reduced rates surpassed 22 million tonnes per year, accounting for over 20% of China's total PTA capacity. The operating rate dropped to 68-70%, the lowest in three years for the same period.

Normally, maintenance outages are planned and manageable. But with the Hormuz-driven crude surge, restarting units becomes more expensive—and some plants are delaying restarts, waiting for feedstock costs to stabilize. That hasn't happened. The result: a double squeeze. Feedstock prices are high, and supply is tight at the same time.

One fabric trader in Yiwu, Lou Qiaoping, told local media that nylon fiber shortages were already hitting orders. "Many of our upstream factories can't fully complete orders because they can't get enough raw material," she said (21 Economic Herald, April 2026).

The Real Pain: Mills Can't Pass Costs On

Here's the structural problem that every procurement professional needs to understand. The textile industry has chronic overcapacity in weaving and knitting. With thousands of mills competing for orders, especially in China and across Asia, pricing power sits with the brand buyers and garment manufacturers, not the fabric mills. When raw material costs spike, mills can't simply raise their prices by the same amount—they'd lose the order to the mill next door.

The consequence is brutal: mills cut production. According to data from the Silk City Net (a textile industry monitoring platform in Shengze), the average operating rate across weaving enterprises dropped to 62.1% in April 2026. That's one-third of looms sitting idle. Some mills are running only partial shifts, and delivery delays are piling up.

He Rong, general manager of Zhejiang Haining Zhongfang Textile Technology, described the situation bluntly: "For garments using chemical fiber with three-dimensional flocking effects, the cost increased by about 5 to 10 yuan per piece. If the raw material continues to rise, designers will switch to rayon." (21 Economic Herald, April). That substitution is already happening—where polyester is replaced by viscose (rayon), which is less dependent on oil but brings its own problems (lower strength, higher shrinkage).

Coping Strategies: What Smart Mills Are Doing

Not every mill is passive. The companies that survive this squeeze are the ones who acted early. Here are the concrete strategies being deployed right now:

• Stockpiling and hedging. Ma Ziyi, a fabric trader in Keqiao, said her company chose to absorb losses on contracts signed before the price surge, using inventory built up during lower-price periods to honor commitments (21 Economic Herald).
• Shortening delivery cycles and prioritizing fast-turnaround orders. Yang Wei, general manager of Zhejiang Jinchan Curtain Fabric, said his company kept prices stable for downstream clients by relying on stockpiles, adjusting inventory across factories, and accelerating production for quick-turn SKUs.
• Differentiating through R&D. The same company invested in differentiated fabric finishes (flame retardant, UV protection, antimicrobial) to increase value add and bargaining power. When a fabric has unique technical performance, buyers are less likely to push for price concessions.
• Material substitution. As He Rong noted, some factories are replacing polyester with rayon or even cotton blends in designs where performance allows. This reduces direct exposure to PTA/Oil prices—though at the cost of different physical properties and supply chain adjustments.

What This Means for Supply Chain Resilience

The Hormuz crisis is a stark reminder that textile supply chains remain deeply vulnerable to geopolitical shocks. Polyester, which makes up over 50% of global fiber production (knowledge base), is the backbone of sportswear, outdoor gear, uniforms, and home textiles. A disruption in its raw material chain can cascade through the entire apparel industry.

For importers and brand sourcing teams, this is the time to:

• Diversify fiber sourcing. Don't put all your eggs in polyester. Consider blends with recycled polyester, nylon, or cellulosics like lyocell. Each has a different price sensitivity to oil.
• Build longer-term contracts with price adjustment clauses. Fixed-price agreements are dangerous in volatile markets. Index-linked pricing or shared-risk models protect both sides.
• Invest in supplier relationships. The mills that survive better—like Jinchan—are those with strong financial buffers and R&D capabilities. If you're working with a mill that runs on thin margins and no innovation, a crisis like this will break them. Better to partner with technically capable, diversified suppliers.
• Monitor secondary effects. The Hormuz crisis isn't just about polyester. It's also about shipping costs for finished goods. Container rates from China to the US West Coast have risen ~18% since the start of 2026 (Shanghai Shipping Exchange data). Combined with raw material inflation, total landed cost is climbing.

For more on how regional sourcing shifts affect margins, read our previous piece on Comparing Import Compliance Costs: Functional Cotton Blends from China, Vietnam, and Turkey. And if you're evaluating polyester's environmental trade-offs, our Polyester LCA 2026 analysis covers recycled vs. virgin cost-benefit.

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