The polyester filament market started August with a sharp drop in sell-through rates. Industry data shows that on August 1, the average sell-through rate of sample enterprises was only 33.6%, down 3.8 percentage points from the previous trading day, with some companies reporting zero sales. Behind this figure, downstream weaving mills turned cautious after a weekend restocking spree, showing little interest in new purchases. For polyester plants, this means the pace of inventory destocking has slowed again, intensifying the supply-demand game at the start of Q3.
Background
This decline is not an isolated event. Recent data show that the polyester filament market has been sluggish for several consecutive days. On August 1, sell-through rates ranged from 0% to 60%, with significant divergence—some enterprises achieved 60% while others had no transactions at all. This polarization reflects the fragmentation and uncertainty of end-user orders: large factories maintain some shipments through customer loyalty, while smaller companies face greater sales pressure.
It is worth noting that fluctuations in sell-through rates are highly correlated with downstream restocking cycles. After weekend replenishment, short-term procurement demand is exhausted, naturally reducing willingness to buy. This 'pulse-like' purchasing rhythm has become more pronounced in recent months, indicating that downstream weaving mills are adopting a cautious just-in-time procurement strategy rather than traditional bulk stocking. For upstream polyester plants, this makes sales forecasting more difficult, and inventory management becomes a key variable determining cash flow.
Industry Impact
The weak sell-through rate directly points to the risk of rising polyester filament inventories. Polyester plants generally maintain high operating rates, while downstream digestion capacity is limited. The supply-demand mismatch may push inventory days higher. Historical experience shows that when sell-through rates remain below 40% for consecutive days, plants often resort to price cuts or maintenance shutdowns, leading to a downward shift in the price center. Q3 is traditionally a transition period from off-season to peak season in textiles. If demand remains weak, polyester filament prices may face downward pressure, and price spreads among POY, FDY, and DTY may narrow.
For downstream weaving mills, fluctuations in raw material costs directly impact fabric profits. Currently, polyester filament prices are relatively stable, but low sell-through rates imply that bargaining space may open up. Buyers who seize low-price windows during the off-season can effectively reduce production costs in the second half of the year. However, uncertainty in raw material prices also requires companies to avoid excessive hoarding to prevent capital occupation and price drop risks.
From the industry chain perspective, the decline in polyester filament sell-through rates has gradually transmitted to upstream PTA and PX sectors. The expectation of reduced polyester plant output may suppress demand for raw materials, thereby affecting the operating load of the entire polyester chain. Meanwhile, fluctuations in international oil prices add complexity to cost-side shocks and price transmission. For foreign trade enterprises, the combined effects of RMB exchange rate changes, ocean freight fluctuations, and raw material volatility squeeze profit margins on export orders.