On July 9, a 200,000-ton PTA plant in Yisheng Hainan unexpectedly halted, driving the Zhengzhou Commodity Exchange PTA main contract up 96 yuan/ton to 5,622 yuan/ton, with open interest increasing by 2,419 lots. Behind these numbers lies strong support for spot PTA prices from supply contraction expectations, and more importantly, a price fuse ready to transmit through the entire polyester chain.
Cost Shock: Short- and Long-Term Logic of PTA Supply Contraction
The immediate consequence of the Yisheng Hainan plant halt is a daily reduction of approximately 5,500 tons in domestic PTA supply. While this represents a modest share of total national capacity, its marginal impact is amplified given that PTA social inventories are already at relatively low levels. Zhengzhou Commodity Exchange data confirms this: the increase in open interest by 2,419 lots indicates strong bullish sentiment among funds, reflecting that short-term supply tightness expectations have quickly translated into upward futures momentum.
From a transmission mechanism perspective, PTA is the core raw material for polyester FDY, staple fiber, POY, and DTY, accounting for 70%-85% of production costs. This means that for every 1% increase in PTA prices, the production costs of downstream polyester products will rigidly rise by approximately 0.7-0.85 percentage points. The raw material price hike expectations triggered by this plant halt have already transmitted through cost channels to various polyester varieties, driving spot prices higher in tandem. Industry public data shows that on July 9, the sentiment scores for polyester FDY, staple fiber, POY, and DTY all rose to 1 point, indicating growing market consensus on a bullish trend.
Polyester Variety Divergence: Who Takes the Biggest Hit?
Different polyester products have varying sensitivity to PTA price fluctuations. Polyester FDY and POY, with shorter production processes and higher raw material cost shares, respond most directly to PTA price changes. Polyester DTY, due to its texturing process and higher added value, has slightly more cost elasticity, but raw material price increases still pass through the chain. Polyester staple fiber faces dual pressure: on one hand, rising PTA prices push up costs; on the other, downstream spinning mills may slow procurement due to squeezed profit margins, leading to phased market wait-and-see.
Spot market feedback shows that ex-factory prices for polyester FDY and POY have been raised by 50-100 yuan/ton since the halt announcement, while adjustments for polyester staple fiber have been more restrained, reflecting different judgments on downstream demand absorption capacity. For buyers, this round of price increases is not universal but shows a clear pattern of "stronger filament, weaker staple."
Industrial Belt Reaction: Cost Stress Tests from Raw Materials to Weaving
The impact of the PTA plant halt will not stop at the chemical fiber stage. Weaving clusters in Shengze and Keqiao, major consumers of polyester filament, typically maintain 7-15 days of raw material safety inventory. The rise in polyester filament prices triggered by PTA increases will gradually transmit to grey fabric costs over the next 1-2 weeks. Given that current weaving sector utilization rates have fallen from 85% at the start of the year to around 72%, and end-user orders remain weak, raw material price increases may further compress weaving margins.
More notably, PTA supply contraction expectations could trigger "panic buying" among downstream firms. If polyester filament prices continue to rise, weavers may rush to lock in costs, creating a temporary demand surge that reinforces price hike expectations. This positive feedback loop of "cost push + demand follow-through" during the 2021 PTA production cuts led to polyester filament prices surging over 15% in two months.