77.5% versus 0%. On the same day, for the same product category, the sales-to-output ratios of sampled enterprises can diverge that dramatically. This is not a statistical error but an accurate reflection of the current polyester filament market. According to publicly available data from China's chemical fiber industry, the average sales-to-output ratio of sampled polyester filament enterprises reached 77.5% on September 24, up 54 percentage points from the previous trading day. On the surface, the market appears to be recovering. But when the sample is broken down, transactions are highly concentrated among a few enterprises, while most mills are far less optimistic than the average suggests.
What the Data Discrepancy Reveals About Shipment Structure
The immediate driver of this surge was concentrated discounting ahead of the Mid-Autumn Festival. Producers proactively compressed profit margins to trade price for volume, and localized sales rebounded. Notably, however, further expansion of discount room was still expected at the close, suggesting that the day's volume surge may be just the beginning rather than the end.
Looking at the sample distribution, sales-to-output ratios ranged from 0% to 240%, indicating extreme dispersion. A handful of enterprises achieved more than double their output in sales thanks to pricing advantages or customer structure, while a considerable number remained below 40%. This "lively head, cold tail" pattern indicates that current demand release is not industry-wide order recovery but price-driven selective restocking.
For upstream polyester plants, this means inventory pressure has not truly eased—it has merely shifted from the plant side to traders and downstream weaving. The essence of pre-holiday discounting is trading profit for cash flow and inventory space.
Margin Squeeze and Inventory Game
Polyester filament has always been highly price-elastic, with sales-to-output ratios responding quickly to price adjustments. The 54-percentage-point single-day jump precisely demonstrates that downstream players are highly price-sensitive—they restock when there are discounts and wait when there are none.
The problem is that this price-driven sales recovery is difficult to sustain. Once discount room narrows, the ratio is likely to fall rapidly. For mills, concentrated pre-holiday shipments may ease short-term inventory pressure but also borrow from post-holiday procurement demand.
On the cost side, polyester raw material prices have fluctuated within a limited range recently, and filament processing margins are already thin. Further pre-holiday concessions mean some grades may be approaching cash-flow cost levels. In this state, if demand cannot follow through after the holiday, the industry may face a new round of production cuts or maintenance games.
For downstream weaving and texturing enterprises, the current low-price restocking window is worth watching, but excessive stockpiling is not advisable. Whether post-holiday demand materializes depends on actual orders from terminal apparel and home textile sectors, not on pre-holiday emotional restocking.
Transmission Differences Across Industrial Belts
Major textile industrial belts such as Keqiao, Shengze, and Nantong respond differently to filament price movements. Weaving enterprises in Shengze, which use polyester filament as their primary raw material, are most sensitive to sales-to-output ratios and price changes. Fabric enterprises in Keqiao focus more on finished product price transmission. Nantong home textile enterprises are more influenced by terminal consumption rhythms.
This divergence means that the same filament discount transmits differently across industrial belts. Shengze enterprises may restock first, while Keqiao and Nantong follow depending on the visibility of their respective terminal orders. For buyers, timing restocking decisions cannot rely solely on the filament sales-to-output ratio—it must be combined with order rhythms in their own industrial belt.