25.8%—that was the average sales-to-production ratio of sampled polyester filament enterprises on September 3, a sharp decline of 13.3 percentage points from the previous trading day. Behind this figure lies a tug-of-war between persistently high polymerization costs and strong downstream resistance. As cost-push price hikes meet weak demand, the polyester filament market is entering a delicate and dangerous equilibrium.
What the Data Reveals
The sales-to-production ratio is the most direct indicator of market warmth in the polyester filament sector. On September 3, the ratio varied widely among sampled enterprises—from 0% to 90%—but the majority clustered in the low 10%-30% range. This suggests that while a few companies maintained higher shipments through differentiated products, the industry as a whole was stuck in a "cannot sell" predicament.
More alarming is the sharp 13.3-percentage-point drop from the previous trading day, which is not an isolated fluctuation. Combined with recent rising polymerization costs, it is clear that cost pressures are accelerating transmission to polyester filament prices, but downstream users' acceptance of price increases is extremely low, leading to a stalemate. This pattern of "upstream raising prices, downstream rejecting" often signals inventory accumulation and cash flow pressure gathering at upstream producers.
The Cost-Demand Game
The direct raw materials for polyester filament are polyester chips, which in turn depend heavily on PTA and ethylene glycol. When polymerization costs remain high, filament producers are forced to raise prices to maintain margins. However, downstream weaving enterprises, facing weak end-order demand, have little tolerance for raw material price increases. The quiet buying on September 3 is a direct reflection of this standoff.
From an industrial chain perspective, if this stalemate persists, two outcomes are likely: first, filament producers may cut production to balance supply and demand, thereby supporting prices; second, some small and medium producers might quietly offer discounts to relieve inventory pressure, causing actual transaction prices to diverge from quoted prices. For buyers, this means quoted numbers may not represent real transaction costs, and there may be more room for negotiation than appears.
Regional Responses and Procurement Psychology
Major polyester filament production capacity is concentrated in industrial belts such as Tongxiang and Shaoxing in Zhejiang, and Shengze in Jiangsu. The ripple effects of low sales-to-production ratios are manifesting in these regions. Weaving enterprises in Shengze are generally adopting a "buy-as-needed" strategy to avoid stockpiling at high prices, while filament plants in Tongxiang are adjusting operating rates to cope with slower shipments.
This psychological game between upstream and downstream is essentially a disagreement over future price trends. Upstream believes that cost support makes price drops unlikely, while downstream argues that weak demand makes price hikes unsustainable. Historical experience shows that when the sales-to-production ratio stays below 30% for an extended period, a price inflection point is often not far off—either upstream compromises with price cuts, or downstream is forced to accept higher prices. The key to breaking the deadlock usually lies in a substantial recovery of end demand.