On September 7, 2026, the same specification of polyester DTY was quoted at 9,760 CNY/ton by Tongkun Group and 10,350 CNY/ton by Rongsheng Petrochemical, a gap of 590 CNY/ton, meaning Rongsheng is about 6% more expensive than Tongkun. This is not random market fluctuation but a direct reflection of differences in capacity layout, cost control, and customer positioning among polyester giants. For downstream weaving enterprises, understanding this price gap is more valuable than staring at daily fluctuations.
Background
Both leading chemical fiber companies updated their polyester DTY quotes on the same day. Tongkun quoted 150D/48F melt-spun AA-grade semi-dull low-elastic yarn at 9,760 CNY/ton, while Rongsheng quoted the same specification at 10,350 CNY/ton. Both are located in Zhejiang Province, but the nearly 600 CNY difference was often attributed to brand premium in the past; now it requires deeper industrial logic.
Polyester DTY is a core midstream product in the chemical fiber chain. Its price is influenced by upstream PTA and MEG costs and directly determines the production cost of downstream woven and knitted fabrics. The 150D/48F specification is common with high market demand and price transparency, making major manufacturers' quotes a bellwether. Tongkun and Rongsheng are both industry leaders, but their strategic paths have diverged significantly in recent years.
Tongkun is known for its integrated refining and chemical projects, from PX to polyester to spinning, which compresses intermediate costs to industry lows. Rongsheng also has refining assets, but its product mix has a higher share of differentiated fibers and high-end applications, which increases R&D and marketing costs. When the industry operates in a thin-margin zone, cost leaders can proactively cut prices to gain volume, while differentiation players must maintain prices to cover premium investments.
Industry Impact
The 590 CNY price gap has varying implications for buyers depending on order structure. For small and medium weaving factories producing standard fabrics and focusing on volume, Tongkun's 9,760 CNY quote means saving nearly 600 CNY per ton of raw material. With a monthly purchase volume of 100 tons, this reduces costs by 60,000 CNY per month, directly affecting whether processing fees cover labor and energy costs.
However, low price is not the only solution. Some high-end fabric orders require DTY with specific dyeing uniformity and strength stability. Rongsheng's reputation for quality control supports its higher quote. If buyers judge solely on price differences, they may face quality risks on high-end orders. Essentially, the price gap is a pricing difference between two supply capabilities, not a simple matter of expensive or cheap.
From a chain perspective, this quote divergence signals that the chemical fiber industry is shifting from homogeneous competition to layered competition. Leading companies are no longer fighting over the same price band but each anchoring to target customer groups. For upstream raw material suppliers, this means procurement agreements for PTA and MEG need to be more flexible to match different clients' cost tolerance. For downstream fabric enterprises, supplier selection logic should shift from "whoever is cheapest" to "whoever fits my product line better."
The quote data also reveals linkage signals from regional industry belts. Both companies are in Zhejiang, but Tongkun's capacity is mainly in Jiaxing, while Rongsheng relies on its Xiaoshan base in Hangzhou. Although both are part of the Zhejiang chemical fiber cluster, Jiaxing's supporting industries are more oriented toward conventional polyester filaments, while Xiaoshan is more closely linked with the Shaoxing printing and weaving cluster. This geographic division is reflected in quotes, meaning regional procurement strategies also need to be differentiated.
Practical Advice
For Buyers - Establish a dual-track supplier strategy: for standard orders, prioritize long-term contracts with cost-leading manufacturers (e.g., Tongkun) to lock in low prices; for high-end or export orders, reserve a quota with differentiated suppliers to avoid quality risks. - Track the monthly price gap trend: if the gap between Tongkun and Rongsheng consistently exceeds 500 CNY/ton, consider shifting some mid-range orders to low-cost manufacturers, but first conduct small-batch trials to verify quality.
For Foreign Trade Companies - Introduce raw material index-linked clauses in export quotes, using public quotes from Tongkun or Rongsheng as benchmarks to set adjustment formulas, reducing quotation risks from exchange rate and raw material fluctuations. - Adjust sourcing sources for different target markets: Southeast Asian customers are price-sensitive, so prioritize low-cost raw materials; if European or American customers require traceability and environmental certifications, Rongsheng's differentiated suppliers may have more complete compliance documents.
The daily quote sheet for polyester DTY is becoming a microcosmic window into the evolving competitive landscape of the chemical fiber industry. When price strategies of leading companies begin to layer, it implies that value distribution across the entire chain is being reshuffled. For enterprises in this chain, rather than obsessing over daily price gaps, it is wiser to re-examine their supply chain positioning and find their own price band in the layered structure.