This week (September 8th to September 12th, 2025), the overall price of polyester bottle chips showed a weak downward trend. As the mainstream market, the average price of polyester bottle flakes in East China was 5885 yuan/ton on September 12th, a decrease of 10 yuan/ton from the beginning of the week. The quotation range for goods from September to November is between 5800-5980 yuan/ton, and the delivery range is between 5790-5830 yuan/ton, with relatively few market inquiries.
Insufficient cost support: This is the main pressure for the weakening of prices this week. The international crude oil market fell due to concerns about OPEC+launching new production plans. At the same time, although the operating load of PTA, the main raw material, is not high (69.11%), the spot market is sufficient, and its market is weak and volatile, making it difficult to effectively support the cost of bottle chips.
The supply side has contracted slightly, but inventory pressure still exists: mainstream producers maintain their production reduction strategy, and the weekly operating rate of the industry remains at 70.9%. However, with sufficient spot supply in the market and a relatively high inventory availability of 16.97 days in the polyester bottle chip factory, high inventory continues to suppress the room for price rebound.
Weak demand side: Downstream terminals (such as the soft drink packaging industry) are mainly focused on rigid procurement, and the sustainability of centralized replenishment is limited, resulting in a lack of market momentum for increasing volume. End users often adopt a strategy of on-demand procurement, resulting in fewer market inquiries.
Business Society believes that in the short term, under the pattern of “weak cost and demand”, the market mentality is generally cautious and the trading atmosphere is average. The price of PET spot market is expected to fluctuate weakly within the range of 5800-5950 yuan/ton in the short term, mainly due to narrow fluctuations on the cost side. The actual trend still needs to pay attention to changes in external news, equipment changes, and demand recovery.

This week, the domestic epoxy propane market prices have been weakly stable. According to the monitoring system of Shengyi Society, as of September 11th, the benchmark price of Shengyi Society’s epoxy propane was 7500 yuan/ton, an increase of 0.67% compared to the beginning of the month.
Price influencing factors:
Raw material side: This week, the price of raw material propylene has risen, supported by high costs. However, the downstream purchasing atmosphere is not positive, and the price center of epoxy propane market is under pressure and declining. According to the market analysis system of Shengyi Society, as of September 11th, the benchmark price of propylene in Shengyi Society was 6725.75 yuan/ton, an increase of 0.94% compared to the beginning of this month (6663.25 yuan/ton).
Demand side: Downstream demand for epoxy propane is weak, the purchasing atmosphere is cold, and enterprise shipments are not smooth. It is expected that the epoxy propane market price will fluctuate narrowly in the near future.
Market forecast:
Business Society’s epoxy propane analyst believes that the high support of epoxy propane raw materials is still acceptable, but downstream market purchasing is not active, trading atmosphere is cold, and the market price center is declining. It is expected that the short-term epoxy propane market will mainly experience narrow fluctuations, and more attention should be paid to changes in raw material prices and upstream and downstream supply and demand.

According to the Commodity Market Analysis System of Shengyi Society, as of the 8th, the price of ethyl acetate was 5373.33 yuan/ton, an increase of 0.19% compared to the price of 5363.33 yuan/ton on September 1st. The supplier’s equipment is running smoothly, with favorable support from rising raw material prices. Downstream demand follow-up is limited, and the market is relatively weak. The ethyl acetate market is experiencing a narrow upward trend.
The utilization rate of domestic ethyl acetate production capacity has slightly increased, market inventory has increased, and enterprises have maintained a focus on shipments. The raw material acetic acid market is relatively strong, and the price of ethyl acetate has been driven up by costs. In the later stage, the price of acetic acid stabilized, and market support weakened. At the same time, downstream consumption was average, demand performance was weak, and the mentality of operators was poor. The price of ethyl acetate has been adjusted downward.
Looking at the future, the ethyl acetate plant is running smoothly, and the industry is mainly adopting a wait-and-see attitude. The raw material acetic acid market is relatively strong, and downstream demand is weak. Market news is playing on the surface, and the shipment situation of ethyl acetate enterprises is inconsistent. It is expected that ethyl acetate will fluctuate and consolidate in the short term, and specific attention will be paid to the trend of raw materials and downstream follow-up.

Last week (September 1-7, 2025), the market trend of the main raw material dissolving slurry was deadlocked, with limited cost support and little fluctuation in on-site supply. The industry inventory level was low, and downstream enterprises signed orders according to demand. The overall trading atmosphere in the market was stable, and the price of adhesive short fiber remained weak and stable.
According to the Commodity Market Analysis System of Shengyi Society, last week (September 1-7, 2025), the market price of viscose staple fiber was weakly stable. As of September 7, the average market price of viscose staple fiber was 13040 yuan/ton, which was the same as the same period last week.
In terms of cost: Last week (September 1-7, 2025), there was little change in the market price of raw material dissolving pulp, with weak support and limited cost support. As of now, the price of domestic dissolving pulp is around 6700 yuan/ton, the price of external broad-leaved pulp is around 800 US dollars/ton, and the price of coniferous pulp is around 870 US dollars/ton. The market prices of auxiliary materials such as liquid alkali and sulfuric acid remain stable but fluctuate slightly, with average cost support.
The supply fluctuation is not significant
The industry supply has declined, and the current daily operating rate in the market remains at around 75%. The inventory levels of various adhesive short fiber manufacturers have declined compared to the previous period, and downstream yarn companies are picking up goods as needed. The overall inventory level of the adhesive short fiber market has decreased, and the supply fluctuation in the industry is not significant. Some manufacturers have low inventory, and the positive support from the supply side is limited.
Downstream essential replenishment
The operating rate of downstream cotton yarn market equipment has slightly increased, and price fluctuations are not significant. As of September 7th, the price of ring spun R30S in Jiangsu region is around 17100 yuan/ton, and the price of ring spun R40S is around 18300 yuan/ton. The market is in a traditional off-season of demand, and downstream cotton yarn market transactions are not ideal. Only a few models of vortex spun cotton yarn have slightly better export orders. Cotton mills mainly consume raw material inventory and replenish urgently needed goods, with no significant improvement in demand.
Future forecast
On the raw material side, the main material dissolution slurry market and the auxiliary material sulfuric acid market are generally stable, while the liquid alkali market may experience a narrow decline. Therefore, it is expected that the market price trend of adhesive short fiber raw materials will decline in the short term, and the cost support will be insufficient.
Supply and demand side: The operating rate of the adhesive short fiber market equipment may not fluctuate significantly, and some manufacturers have high inventory levels. Therefore, it is expected that the supply side support of the adhesive short fiber market will be poor in the short term; The terminal market is still in the traditional off-season of demand, with limited new orders placed. Downstream yarn mills are experiencing a certain degree of risk aversion and may maintain their demand for signing orders. It is expected that the driving force of the adhesive short fiber market from the demand side will be moderate in the short term.
Overall, the main raw material dissolution slurry market may be weak and stagnant, with sufficient overall supply. Downstream yarn mills mainly sign orders according to demand. Under the interweaving of on-site news, adhesive short fiber manufacturers may maintain their previous quotations. Therefore, analysts from Shengyi Society predict that the domestic adhesive short fiber market will remain stable with small movements in the short term, and the price is expected to be accepted at 12900-13100 yuan/ton.

According to the Commodity Market Analysis System of Shengyi Society, from September 1st to 5th, the price of MTBE rose from 5007 yuan/ton to 5036 yuan/ton, with a price increase of 0.50% during the period, remaining unchanged on a month on month basis and a year-on-year decrease of 16.30%. The domestic MTBE market has experienced slight fluctuations, with several large MTBE production enterprises in Shandong and other regions concentrating on delivering export orders for September. Due to the factor of export port consolidation, the available spot quantity in the domestic market has significantly decreased. In addition, some downstream operators have a demand for spot purchases, so the mentality of manufacturers to sell at low prices is obvious, and prices are mainly actively pushed up. However, with the rise to a temporary high point, downstream resistance has emerged, and transactions have gradually weakened.
On the cost side, in terms of crude oil: The international oil price has fallen, and the main negative factors are: there are reports that OPEC+is considering continuing to increase production in October, increasing the risk of oversupply, and the traditional fuel consumption peak season in the United States is coming to an end, jointly putting pressure on the oil market. As of September 4th, the settlement price of Brent crude oil futures for the November contract was $66.99 per barrel.
On the demand side and downstream gasoline side, international crude oil futures fluctuated downward, and due to the impact of large-scale events, logistics and transportation in the province and surrounding areas were not smooth. End users and traders had weak ordering intentions, and only a few users bought at low prices, which was difficult to effectively boost the refined oil market. Refineries mainly focused on shipping volume. The MTBE demand side is affected by bearish factors.
Supply side: The operating rate of the equipment has decreased. The short-term domestic MTBE supply is affected by favorable factors.
As of the close on September 4th, the closing price of the Asian MTBE market has decreased by $12.3/ton compared to the previous trading day, with FOB Singapore closing at $670.12-672.12/ton. The closing price of the European MTBE market increased by $7.75/ton compared to the previous trading day, and FOB ARA closed at $946.99-947.49/ton. The closing price of the MTBE market in the United States increased by $17/ton compared to the previous trading day, and the FOB Gulf offshore price closed at $835.64-836/ton (235.95-236.05 cents/gallon).
In the future, it is predicted that raw material prices will slightly decrease, but cost pressure still exists. Manufacturers are still in a loss making situation, and substantial positive news is lacking. It is expected that there will still be a slight downward space in the market. After reaching a certain low point, the enthusiasm of operators to enter the market will increase. The MTBE analyst from Shengyi Society believes that the domestic MTBE market is mainly characterized by narrow fluctuations.