Polyester Filament Prices Cut by 50-100 CNY/Ton as Inventory Pressure Moves Downstream

The polyester filament market has sent another price-cut signal. On August 6, Rongsheng (including Shengyuan) Petrochemical, a core domestic producer, uniformly lowered its polyester POY quotes by 50-100 CNY/ton, with semi-dull POY 75/36 quoted at 8650 CNY/ton, 150/48 at 8250 CNY/ton, 300/96 at 8400 CNY/ton, and black yarn 300/96 at 8850 CNY/ton. This is not an isolated fluctuation but a direct reflection of loosening supply-demand fundamentals—producers are actively destocking, indicating clear short-term pressure on the spot market.

Background

This adjustment covers multiple POY specifications, and although the magnitude is modest, the signal is strong. As a core polyester filament producer, Rongsheng's quote changes are often seen as an industry bellwether. The data shows semi-dull POY 75/36 and 100/96 both quoted at 8650 CNY/ton, while 150/48 is at 8250 CNY/ton, revealing demand differentiation between fine and coarse denier yarns. Black yarn 300/96 at 8850 CNY/ton commands a 450 CNY/ton premium over the same semi-dull spec, indicating differentiated products still hold pricing power.

The direct cause is loose spot supply-demand. Downstream weaving mills have slowed purchasing, leading to inventory accumulation at polyester plants. To relieve capital pressure and maintain production-sales balance, producers have chosen to cut prices to move goods. This active destocking will further suppress spot prices in the short term, forming a negative feedback loop of "price cut—wait-and-see—another cut." For buyers, this is both a window to negotiate lower prices and a risk of inventory devaluation.

Industry Impact

Polyester POY is a core raw material for weaving, and its price fluctuations quickly transmit along the supply chain. For downstream texturizing and weaving mills, lower raw material costs mean reduced production expenses, but they also weaken support for finished product prices. If terminal orders do not pick up simultaneously, weaving mills may face a double squeeze of falling raw material and product prices, potentially compressing profit margins rather than expanding them.

The futures market reaction is equally noteworthy. The spot price cut signal has reinforced bearish expectations for polyester filament, with related futures contracts under pressure. This indicates market participants have already priced in potential further declines. Unless demand improves substantially, spot and futures prices may remain weak and volatile. Foreign trade enterprises should be wary of the combined effect of exchange rate fluctuations and falling raw material prices, which could lead overseas clients to demand more aggressive price reductions.

From a regional industry cluster perspective, consumption hubs like Shengze and Changxing will feel the impact first. Local weaving mills may shift inventory strategies from "stockpiling in anticipation of price rises" to "purchasing on demand," which in turn intensifies destocking pressure on polyester plants. The game between upstream and downstream is unlikely to break the deadlock in the short term.

Practical Recommendations

For Buyers - Replenish on demand; avoid bulk stockpiling just because prices are low, to prevent inventory losses if prices continue to fall. - Monitor weekly quote updates from leading producers such as Rongsheng and Tongkun, and align purchasing windows with your order cycle. - Negotiate more flexible settlement terms with suppliers, such as post-pricing or phased delivery, to mitigate price fluctuation risks.

For Foreign Trade Enterprises - Include raw material price fluctuation clauses in export quotes to avoid passive margin compression due to domestic price cuts. - Use futures tools to hedge raw material price risks and lock in costs for forward orders. - Strengthen communication with overseas clients to explain the industry-wide nature of price adjustments and prevent unreasonable price pressure.