On June 28, 2026, market quotations for polyester fiber balls used in water treatment stabilized at 15,500 RMB/ton, a level maintained for several weeks. Compared with conventional polyester staple fiber priced around 7,000-8,000 RMB/ton, fiber balls command a premium of over 100%, highlighting the significant profit margin of functional deep-processed products.
Background
According to publicly available industry data, on June 28, 2026, Henan Kaijie Water Treatment Co., Ltd. quoted fiber balls (standard grade) at 15,500 RMB/ton for three specifications (50mm, 40mm, 30mm diameter), all with delivery in Zhengzhou, Henan Province. This quotation remained flat from the previous month, showing no seasonal fluctuation. Fiber balls, used as filter media in water treatment, are made from polyester staple fiber through special processing into spherical shapes, primarily for suspended solids filtration in industrial wastewater and circulating water systems.
This pricing event occurred against a backdrop of loose supply-demand balance in the broader polyester staple fiber market. According to China Customs data, polyester staple fiber exports grew about 8% year-on-year from January to May 2026, but domestic textile end-demand recovery was weaker than expected, leading to inventory buildup for standard grades. The resilience of fiber ball prices suggests relatively rigid demand from its downstream sector—industrial water treatment.
Industry Impact
The extension of polyester staple fiber into environmental filtration materials is reshaping the value perception of this category. Traditionally, over 70% of polyester staple fiber goes into spinning, nonwovens, and filling materials, while water treatment fiber balls represent a niche but high-value-added deep-processed product. From a cost structure perspective, raw material prices for PTA and ethylene glycol continued to decline in Q2 2026, weakening the cost support for polyester chips. However, fiber balls, due to their specialized processing (e.g., heat setting, cutting, ball-forming), are less affected by raw material fluctuations and depend more on the procurement rhythm of industrial customers.
For polyester staple fiber producers, this signals a window for product structure upgrading. Processing margins for standard staple fiber have compressed to 200-300 RMB/ton, while those for fiber ball products can exceed 2,000 RMB/ton. However, entering this niche requires overcoming three barriers:
- Equipment modification: adding cutting, ball-forming, and sieving machines
- Customer certification: industrial water treatment clients have strict standards for particle size, strength, and porosity
- Sales channels: unlike textile markets, producers need to connect with environmental engineering firms and design institutes
From a regional industrial cluster perspective, Henan, as the main pricing location for fiber balls, is not a major polyester staple fiber producing region (which is concentrated in Zhejiang, Jiangsu, and Fujian). Yet, leveraging its geographic advantage to serve the industrial water treatment markets in North and Northwest China, it has formed a regional processing and distribution hub. This suggests that the end-use applications of polyester staple fiber are expanding from coastal textile clusters to inland environmental markets.