From late August to early September, China's PTA supply saw a concentrated release: Honggang Petrochemical's two 2.5-million-ton units restarted, gradually adding a total of 5 million tons of annual capacity. This coincided with a 152 yuan/ton rise in the main PTA futures contract to 5,836 yuan/ton, creating a sharp contrast between supply expectations and short-term market strength, signaling a new phase of long-short gaming.
Unit Dynamics and Supply Rhythm
Honggang's No.1 2.5-million-ton PTA unit, shut since July 3, restarted on September 1 and is ramping up; the No.2 unit, shut since July 1, produced output on August 26 and is also increasing load. Together, these units account for about 5% of domestic PTA capacity. Their restart means the supply lost during maintenance will gradually return over the coming weeks, easing market availability.
Timing is critical: late August to early September is the pre-season stocking window before the traditional 'golden September and silver October' demand pickup. The supply increase and seasonal demand recovery may offset each other, but with PTA social inventories at mid-to-high levels, new output may build up in visible stocks rather than being fully absorbed downstream. Polyester plants may postpone raw material purchases, waiting for lower prices.
Futures and Price Expectations
On August 31, the main PTA futures contract (2701) closed at 5,836 yuan/ton, up 152 yuan from the previous session, about 2.7%. On the surface, this seems contrary to the supply-increase logic, but the rally was more driven by crude oil rebound and market sentiment than fundamentals. As the restart news is digested, supply expectations will gradually reflect in prices, putting pressure on futures.
In the spot market, weaker PTA prices will directly erode cost support for polyester products. For staple fiber, POY, DTY, and FDY, PTA typically accounts for over 70% of feedstock costs. Thus, a 100 yuan/ton drop in PTA would lower theoretical polyester costs by about 70 yuan/ton. Unless demand surprises to the upside, cost softening may lead to polyester price declines, but likely smaller than the raw material drop, allowing slight processing margin recovery.
Chain Transmission and Procurement Strategy
The impact of increased PTA supply is not uniform downstream. Polyester filament (POY, DTY, FDY) and staple fiber face different supply-demand dynamics: staple fiber is more concentrated, with stronger price support, while filament is fragmented and more competitive, making price adjustments more demand-driven. Therefore, in a weak PTA cycle, staple fiber prices may prove more resilient than filament.
For weaving mills, lower raw material costs reduce production burdens, but they must watch inventory devaluation risks. If they stocked up at higher prices, PTA declines could squeeze margins. Thus, a 'small batches, frequent purchases' strategy is advisable, avoiding large one-time orders at high prices. Also, monitor crude oil trends and actual load ramp-up; if units ramp slower than expected, supply increases may fall short, limiting downside.