On the first trading day of September, the main PTA futures contract on the Zhengzhou Commodity Exchange closed at 5,836 yuan per ton, up 152 yuan on the day, but this rebound did little to ease concerns about supply. Honggang Petrochemical's two PTA units, totaling 5 million tons of capacity, are being restarted and brought back to full operation. The No. 1 line resumed on September 1, while the No. 2 line had already started producing on August 26. The arrival of incremental supply means the maintenance-driven price support that had been propping up PTA is quickly fading, forcing a reassessment of cost logic across the polyester chain.
Event Background
Both Honggang units are 2.5-million-ton lines, shut down for maintenance in early July. The No. 1 line stopped on July 3 and restarted on September 1; the No. 2 line stopped on July 1 and resumed output on August 26, with load rates still ramping up. Combined, these units account for a modest share of national PTA capacity, but the 5-million-ton scale holds significant weight in regional supply-demand balance, and the concentrated restart impacts market sentiment far beyond the numbers.
Timing is notable: the restart coincides with the prelude to the traditional 'golden September and silver October' stocking season. In previous years, downstream polyester plants typically increase raw material purchases during this period, but this year supply has expanded first, potentially disrupting stocking plans. It usually takes about a week for a unit to go from restart to full operation, meaning incremental supply will fully hit the spot market around mid-September, while futures have already priced in this expectation.
Industry Impact
The most direct effect of increased PTA supply is downward pressure on spot prices. The previous supply tightness caused by maintenance had been a key support for PTA prices, and that support is now crumbling. For Zhengzhou futures, although the main contract rose on August 31, the expectation of additional supply will continue to weigh on subsequent trends, with a bearish score of -1.
More critical is the transmission to downstream polyester products. PTA is the core raw material for polyester staple fiber, POY, DTY, and FDY. Weakening cost support directly compresses the price floor for these products. Industry scores give a slight bearish rating of -0.5 to all four polyester varieties, suggesting that while cost softening won't trigger a price collapse, it will undermine mills' ability to hold prices. For polyester plants, lower raw material costs are normally a positive, but if end-use demand fails to pick up simultaneously, product prices may follow raw materials downward, and profit margins may not expand effectively.
For buyers, the cost-down expectation from increased PTA supply may translate into price concessions on polyester products. However, this transmission lags and is influenced by downstream operating rates and inventory levels. Exporters should be wary of price volatility, especially in locking prices for existing orders, to avoid margin erosion from sharp short-term raw material swings.