On September 7, the average sales-to-output ratio of polyester filament sample enterprises stood at 23.5%, up merely 2.5 percentage points from the previous trading day. What does this figure imply? For every 100 tons of polyester filament produced, fewer than 24 tons were sold smoothly. For any manufacturing segment, this is far from a healthy level, especially when the traditional 'golden September' peak season was expected to boost demand, yet the market delivered such a lackluster response.
What the Data Reveals About Real Demand
According to publicly available sales-to-output data from sample enterprises, individual performances varied widely: the highest ratio reached 130%, while the lowest was 0%, with most firms falling between 10% and 30%. The specific distribution was: 40%, 18%, 40%, 25%, 130%, 20%, 10%, 25%, 10%, 5%, 15%, 25%, 30%, 20%, 20%, 15%, 10%, 10%, 0%, 20%, 40%, 10%, 20%, 15%, 20%, 30%, 40%. Over 70% of sample enterprises recorded ratios below 30%, underscoring weak overall downstream purchasing willingness.
Such a pattern—high ratios for a few, low for the majority—typically indicates that market activity is sustained only by a handful of large orders or urgent restocking, rather than broad-based demand recovery. For weaving mills, the pace of raw material procurement has visibly slowed, with high-price resistance being the direct cause. Polyester filament prices have been moving sideways without offering sufficient concessions, prompting buyers to wait and observe.
How Low Ratios Transmit Upstream
The sales-to-output ratio is a leading indicator of supply-demand dynamics in the polyester value chain. A 23.5% ratio means that polyester filament plants are adding inventory equivalent to roughly three-quarters of their daily output. If this persists for a week, inventories will accumulate significantly, forcing mills to cut prices or reduce operating rates. In fact, inventory pressure in the polyester segment is forming a closed loop: when filament sales are sluggish, plants become cautious in procuring upstream PTA and MEG, thereby weakening demand at the raw material end.
From an industry transmission perspective, the current situation follows a chain of 'downstream wait-and-see → midstream inventory build-up → upstream pressure.' For polyester filament plants, a sales-to-output ratio persistently below 30% is approaching the cash cost warning line; continuing full-capacity production would only exacerbate losses. Downstream weaving mills are confident in pressing for lower prices and delaying purchases precisely because they anticipate that upstream inventory pressure will eventually translate into price concessions.
The Game Behind Price Consolidation
The 'sideways consolidation' in the polyester filament market is not a sign of supply-demand balance but a temporary standoff between upstream and downstream. Sellers attempt to maintain prices to protect margins, while buyers express their stance through low sales-to-output ratios: no price cuts, no orders. Historically, such standoffs often end with sellers conceding, especially when inventories exceed safe thresholds, prompting mills to cut prices to destock.
Notably, the sales-to-output ratio increased by 2.5 percentage points from the previous day. Although limited in magnitude, it indicates some support at the current price level. Some essential orders are beginning to enter the market, but a trend has yet to form. Market participants should closely monitor whether the ratio can consistently exceed 30% in the coming week—if it stays above this line for three consecutive days, a temporary bottom may be confirmed; otherwise, the risk of downward price movement will increase significantly.