The thermometer of the polyester filament market pointed to 34.7% on August 28. That is not the temperature, but the average sales-to-output ratio of sample enterprises—up 5.3 percentage points from the previous trading day, yet still hovering in a cold zone below 40%. When the sales-to-output ratio stays below 50% for an extended period, it means that for every 100 tons of yarn that weavers take, factories must pile more than 60 tons in their warehouses. Behind this figure lies a market split by diverging price expectations.
The Stalemate Behind the Numbers
Public sales-output data show a wide dispersion from 0% to 500% among sample enterprises on that day. A notable number of firms reported zero sales, while the few high ratios likely came from special orders rather than a broad demand recovery. This extreme divergence indicates that the market has not formed a consistent price outlook. Polyester filament mills attempt to hold prices, but downstream users' resistance to high prices remains unabated. Inquiries are sluggish, transactions are scarce, and the market is stuck in a typical 'price without volume' stalemate.
Looking at a longer time frame, this standoff is not an isolated event. The daily evening reports from Chemical Fiber Bond show that from late August to early September, the polyester filament market repeatedly stayed in the low sales-output range. This suggests that the August 28 data is not a random fluctuation but a microcosm of weak demand. For buyers, this means the bargaining space is widening; for mills, it means inventory days are quietly accumulating and cash flow pressure is increasing.
Industrial Chain Transmission: From Cost Pricing to Demand Pricing
In the past two years, the chemical fiber industry has been accustomed to cost-push inflation: crude oil rises, PTA follows, polyester filament raises prices, and downstream weaving mills passively accept. However, the current low sales-to-output ratio reveals a key turning point: demand constraints have outweighed cost support. When weavers themselves face insufficient orders and high finished-goods inventories, no matter how strong the cost logic, it is difficult to transmit downstream. This shift from 'cost pricing' to 'demand pricing' means that polyester filament prices are prone to fall rather than rise in the short term. Even if crude oil rebounds, the follow-through will be greatly diminished.
For downstream fabric mills and traders, this is actually a window to rebuild inventory—but only if they can accurately judge the bottom. For upstream polyester plants, the low sales-to-output ratio leads to rising product inventories, increasing the probability of production cuts or promotions. The industry may enter a self-reinforcing cycle of 'price cuts to destock' until a trigger point—such as a sharp drop in oil prices, concentrated restocking, or policy stimulus—breaks the deadlock.
Regional and Product-Type Variations
Polyester filament production capacity is highly concentrated in the eastern coastal provinces of Zhejiang and Jiangsu, with industrial belts such as Shengze, Changxing, and Tongxiang being the core production areas. Changes in the operating rates of factories in these regions directly affect national supply. If the current low sales-to-output ratio persists, some factories may cut production first, affecting regional raw material procurement rhythms and logistics demand. For textile companies with purchasing offices in these industrial belts, it is crucial to closely monitor factory operating dynamics to anticipate whether delivery cycles will extend.
In terms of product types, the price spreads and sales-to-output ratios of POY, FDY, and DTY usually do not move in sync. From experience, DTY, due to the buffer of the texturing process, tends to lag behind POY; while POY, as the most upstream polyester filament product, its sales-to-output ratio changes are more indicative of the future market direction. If POY sales-to-output ratios remain sluggish in the coming period, it may lead to divergent strategies between chip spinning and melt direct spinning enterprises, further increasing market volatility.
Practical Recommendations
For Purchasers - Use the current buyer's market window to sign short-term or monthly contracts with suppliers to lock in relatively low prices and avoid chasing highs when prices rebound. - Closely track weekly sales-to-output ratios and inventory day data. If the ratio exceeds 60% for a week, treat it as a signal of a price bottom and appropriately increase stock levels. - Clearly express price expectations during inquiries and request deferred payment or warehouse pickup discounts to reduce your own capital occupation.
For Foreign Trade Enterprises - Incorporate the downward trend of polyester filament prices into cost calculations when quoting for existing orders to avoid later price reductions by customers due to falling raw material costs. - Monitor the linkage between the RMB exchange rate and international oil prices. If oil prices rebound but the sales-to-output ratio does not improve, consider moderately lowering export quotes to seize orders. - Leverage overseas customers' attention to sustainability by promoting recycled polyester products, whose prices are less affected by virgin yarn and can hedge some risks.
The standoff in the polyester filament market is, on the surface, a price dispute, but in essence, it is an inevitable step in the rebalancing of supply and demand. When the sales-to-output ratio stays below the threshold for a long time, market mechanisms will force capacity consolidation or demand recovery. What enterprises can do is maintain healthy cash flow during this process and wait for a clear turning signal.