Polyester Filament Price Easing: Rongsheng Petrochemical's Cuts Signal Inventory Stress Down the Chain

In early July 2026, Rongsheng Petrochemical (including Shengyuan Petrochemical), a key supplier of polyester filament yarn, reduced prices on selected DTY products by 100-200 yuan/ton. Specific grades include 75/36 low-elastic yarn at 10,050 yuan/ton, 150/48 at 9,150 yuan/ton, and 300/96 heavy-network yarn at 9,250 yuan/ton. This move coincided with a 136 yuan/ton drop in the main polyester staple fiber futures contract (2609) on the Zhengzhou Commodity Exchange, alongside a notable increase in short positions, signaling a bearish sentiment spreading across the polyester sector.

Supply-Demand Dynamics: Weak End-User Orders Weigh on Spot Sales

Industry data suggests the price cuts were triggered by insufficient end-user order support. The traditional off-season in textiles, coupled with slowing growth in export orders, has dampened procurement enthusiasm among downstream weaving mills. As a market bellwether, Rongsheng's price adjustment indicates that even leading suppliers face mounting spot sales pressure. The multi-score for polyester DTY has been downgraded to -1, with the overall polyester filament rating also at -1, reflecting a bearish short-term outlook.

Polyester staple fiber, though not directly cut, is feeling the emotional spillover. Its score slipped to -0.5, and the rise in short futures positions confirms market concerns over weak demand. This cross-product price linkage suggests that inventory pressure is spreading from filament to staple fiber within the polyester chain.

Industry Impact: Ripple Effects on Downstream Procurement and Inventory Management

For weaving mills and fabric traders, Rongsheng's price reduction signals a clear message: upstream chemical fiber producers are proactively cutting prices to accelerate destocking. This implies that polyester filament prices may still have room to decline in the near term. However, the cuts are modest at 100-200 yuan/ton and localized, not a full-blown crash. Buyers should avoid the psychological trap of "buying on the rise, not on the fall"—over-waiting in a downtrend could miss tactical bottom-fishing opportunities.

Meanwhile, the decline in polyester staple fiber futures indirectly impacts the cotton and blended yarn sectors. As a substitute raw material, weaker staple fiber prices may further compress pricing space for cotton and rayon yarn. For mills producing polyester-cotton blends, the cost structure is shifting subtly.

Practical Recommendations

For Buyers - Monitor Rongsheng's subsequent pricing; if cuts continue for two consecutive weeks, consider phased procurement to lock in low-cost raw materials. - Use polyester staple fiber futures discounts to hedge spot procurement risks through hedging instruments. - Negotiate flexible payment terms with suppliers to avoid long-term fixed-price contracts during price downturns.

For Exporters - Include raw material price fluctuation buffers in export order quotes to prevent domestic polyester price drops from eroding profits due to currency or freight changes. - Track polyester filament price correlations in Southeast Asian markets; if domestic cuts exceed offshore levels, adjust export pricing strategies accordingly. - Lock in raw material costs for confirmed orders at current prices to guard against potential rebounds that could inflate costs.