A 500 yuan per tonne spread for the same specification of polyester FDY is larger than many in the industry would expect. In late September 2026, public quotations for 150D/96F semi-dull AA-grade melt-spun FDY showed Rongsheng Petrochemical at 9,400 yuan per tonne and Kaishi Group at 9,900 yuan per tonne. Identical specifications, both delivered in Zhejiang, yet the gap exceeds 5%. This is not a quotation error. It is a direct reflection of how the polyester chain is fragmenting across cost structures, inventory positions and customer mix.
Where the Spread Comes From
The cost curves of tier-one and tier-two producers were never the same. Rongsheng Petrochemical operates an integrated chain from PTA to polyester spinning, with high raw material self-sufficiency that dilutes unit processing costs. Kaishi Group, despite deep experience in chemical fibre, purchases a larger share of its raw materials externally, making it more directly exposed to PTA and MEG price swings. When polyester feedstock sits at a阶段性 high, this structural difference gets amplified.
Inventory strategy plays a role too. Leading producers tend to adjust operating rates proactively during seasonal transitions, using scale to control shipment节奏. Tier-two producers are more order-driven: when inventory is low, they hold prices firm; when inventory builds, they have more room to concede. The 500 yuan spread is essentially two business logics running in parallel in the same market.
Customer structure further cements the stratification. Rongsheng's quotation targets long-term contract clients and large texturing mills, prioritising volume. Kaishi's quotation includes a higher share of small and medium weaving enterprises and spot buyers, giving it greater price elasticity. In other words, part of the spread is a service premium — payment terms, minimum order quantities and logistics responsiveness are all folded into that 9,900 yuan figure.
What It Means for Upstream and Downstream
For downstream weaving and texturing, the logic of raw material procurement is shifting. Buyers used to anchor decisions on a single market average. But when the quotation range for the same specification widens to 500 yuan per tonne, the reference value of that average is diluted. What really matters is where your supplier sits on the cost curve, and whether that position will hold over the next quarter.
For traders, a wider spread creates arbitrage opportunities but also risk. Lower-priced supply may come with stricter payment terms or longer lead times, while higher-priced supply may carry more flexible service conditions. Comparing prices alone is a trap; settlement methods, delivery schedules and quality consistency must be assessed within the same framework.
More broadly, the divergence in FDY quotations signals that the polyester chain has entered a phase of refined competition. With ample overall capacity and slowing demand growth, competition is shifting from "whether you have the goods" to "on what terms you supply them." This places greater demands on buyers' professional capabilities — those who can read the cost structure and commercial terms behind a quotation will gain the upper hand in procurement.
How the Regional Industrial Belt Is Responding
Zhejiang, as a core polyester spinning region, makes quotation dynamics in Hangzhou and Shaoxing a bellwether. Texturing and weaving enterprises around Xiaoshan and Keqiao are most sensitive to FDY price fluctuations. The current 500 yuan spread transmits unevenly through the Keqiao fabric market — competition in conventional products is intense, and small raw material cost differences are hard to pass through fully to fabric quotations, with most absorbed internally by the weaving segment.
This means weaving enterprises are being squeezed from both ends: upstream raw material quotations are diverging, while downstream fabric price transmission remains weak. Companies with more refined procurement strategies and more diversified supplier portfolios can gain a relative cost advantage in this environment. Competition in the industrial belt is shifting from "capacity" to "procurement management."