Business Society, September 28th News: In September 2025, the overall price of polyester bottle chips showed a weak downward trend. According to the Commodity Market Analysis System of Shengyi Society, in the first and middle of September, there was a continuous decline, and the average selling price of PET fell to 5840 yuan/ton at one point, a decrease of 0.35% from the beginning of the week. In late September (the last week), the market bottomed out and rebounded, with prices in the East China market rising to 5900 yuan/ton. Weakened cost side support: The international crude oil market fell due to market concerns caused by poor economic data in the United States, while the PTA market was weak and volatile, making it difficult to effectively support bottle costs. Crude oil, as the upstream raw material for polyester bottle chips, has experienced a price drop, which has led to a decrease in the cost of polyester bottle chips and subsequently driven down prices. Supply side pressure still exists: domestic polyester bottle production increased by 1100 tons to 330300 tons compared to the previous period, and the capacity utilization rate slightly increased by 0.23% to 72.31%. The market has sufficient spot supply, and even if some companies have reduced production, the overall supply is still at a high level, which continues to suppress the price rebound space. The demand side continues to be weak: downstream terminals such as the soft drink packaging industry mainly rely on rigid procurement, and it is currently in the seasonal off-season, with a lack of market momentum and fewer inquiries. End users often adopt a on-demand procurement strategy without large-scale purchasing behavior, which cannot provide upward momentum for prices. Market sentiment cautious: In the pattern of “weak cost and weak demand”, the trading atmosphere in the market is average, and the mentality of participants is generally cautious. The low trading enthusiasm and market activity of both buyers and sellers make it difficult for prices to fluctuate significantly, resulting in an overall weak downward trend. Affected by factors such as weakened cost support, weak demand, and ongoing supply pressure, Shengyi Society believes that the price of polyester bottle flakes is expected to fluctuate weakly within the range of 5750-5900 yuan/ton.