According to the Commodity Market Analysis System of Shengyi Society, the price of domestic polyester staple fiber fluctuated upward this week (August 18-22). As of August 22, the average market price of domestic polyester staple fiber (1.4D * 38mm) was 6562 yuan/ton, up 1.4% from the beginning of the week.
Costs are gradually rising, and the domestic PTA market has slightly rebounded this week. The average price of PTA in the East China region is 4771 yuan/ton, up 1.08% from the beginning of the week. The overall fundamentals of PTA have improved, and the overseas market supply of PX on the cost side is slightly tight. The expected production of new PTA facilities at home and abroad has strengthened demand support, and PX is gradually strengthening. PTA East and South China facilities have postponed restart and shutdown due to unforeseen circumstances, optimizing their own supply structure. Downstream polyester demand is stable and there is a high volume of production and sales. Combined with the recent macro driven improvement in commodity sentiment, the PTA market price has risen slightly.
Downstream yarn factories are showing increasing resistance and maintaining a focus on replenishing essential goods. Since August, with the easing of tariffs, the orders for autumn and winter fabrics and foreign trade home textiles have gradually increased, and the operating rate of the mainstream weaving industry in Jiangsu and Zhejiang is around 52%. However, the inventory of regular greige fabrics from intermediaries and factories is still at a high level, coupled with limited overall follow-up of new orders, the space for further load increase is limited. Moreover, the actual issuance of large orders remains weak, and in this context, yarn factories prioritize the recovery of funds, making it difficult to see a significant increase in actual demand.
Business analysts believe that PTA is in a phase of improvement in supply and demand, with increased cost support, and the traditional peak demand season for September is approaching. They also have expectations for September demand. Among them, the essential orders for home clothing and bedding fabrics in early winter have been gradually released, while the autumn clothing orders have entered a concentrated delivery period, which will jointly promote the sustained recovery of the overall market atmosphere. It is expected that the short-term prices of polyester staple fibers will continue to be strong.

According to the Commodity Market Analysis System of Shengyi Society, the price of acetic acid has slightly increased recently. On the 19th, the average market price of acetic acid was 2400 yuan/ton, an increase of 30 yuan/ton or 1.27% from the price of 2370 yuan/ton on August 11th. Since mid August, the domestic acetic acid market has mainly operated weakly, mainly due to the high utilization rate of on-site production capacity and the maintenance of high market supply. However, the downstream market is weak, and the enthusiasm for entering the market for purchasing is not high. The demand side support is limited, and the market supply-demand contradiction is deadlocked, with prices in most areas maintaining low levels; On the 19th, the supplier announced that the equipment of manufacturers in Central China has been shut down, and the factory prices have increased significantly. Market prices in other regions have also kept up with the increase.
In mid August, the upstream methanol market experienced a weak downward trend. As of the 19th, the average price in the domestic market was 2301.67 yuan/ton, a decrease of 3.39% compared to the price of 2382.50 yuan/ton on August 11th. During the cycle, the social inventory of ports continues to accumulate, and the mentality of operators is bearish. The demand for spot methanol market is weak, downstream acceptance of high prices is not smooth, the market trading atmosphere is poor, and the focus of the methanol market continues to decline.
The downstream acetic anhydride market has slightly decreased, with the average ex factory price of acetic anhydride dropping from 4092.50 yuan/ton to 4082.50 yuan/ton from August 11th to 19th, a decrease of 0.24%. The trading atmosphere in the upstream acetic acid market is weak, with insufficient support for acetic anhydride. Downstream buyers follow up on demand, and the market trading atmosphere is weak. The supply and demand in the acetic anhydride market are deadlocked, and the price of acetic anhydride fluctuates slightly during the cycle.
Market forecast: Business Society’s acetic acid analyst believes that the utilization rate of domestic acetic acid production capacity remains high, and the market inventory is sufficient. Although the supply news has boosted the mentality of industry players, downstream demand is poor, and enterprise shipments are limited. The situation of oversupply in the market still exists in the short term. It is expected that the acetic acid market will weaken and consolidate in the later stage, and downstream follow-up will be closely monitored in the future.

According to the monitoring of the commodity market analysis system of Shengyi Society, the magnesium ingot market in Shaanxi Province made slight adjustments this week (8.11-8.15), with an average market price of 17450 yuan/ton at the beginning of the week and 17437 yuan/ton at the end of the week, a decrease of 0.07%.
This week, the magnesium market showed a trend of first being strong and then weak, with overall stability and narrow fluctuations. At the beginning of the week, the market operation was relatively strong, but later, due to the slowdown in demand follow-up speed, the market turned to weak and stable operation. Some factories lowered their prices slightly to win orders, while those factories that were not in a hurry to ship temporarily maintained stable quotations.
Supply and demand side
On the supply side, magnesium smelting enterprises are in a state of supply shortage, so most of these enterprises have a strong willingness to maintain high prices. However, due to cash demand in the middle of the month, some companies chose to lower prices slightly to promote shipments.
On the demand side, downstream customers have a high acceptance of the price of 17400 yuan per ton, but when faced with a price of 17500 yuan per ton, most of them adopt a wait-and-see attitude. Overall demand remains stable, but trading volume has declined towards the weekend.
Raw material end
Recent market trends have shown that coal prices continue to rise, driven by the dual effects of tightening supply and sustained recovery in demand, resulting in a continuous increase in coal prices in major production areas. Driven by this, the price of blue charcoal, a downstream product of coal, has also shown a rising trend, and the performance of the silicon iron market is relatively stable.
comprehensive analysis
The magnesium market has once again entered a stage of consolidation, and the current situation between supply and demand is basically balanced. Magnesium prices are expected to remain relatively stable next week.

According to the monitoring of the commodity market analysis system of Shengyi Society, the average price of LLDPE (7042) was 7441 yuan/ton on August 11th and 7448 yuan/ton on August 18th, an increase of 0.09%. LDPE (2426H) had an average price of 9533 yuan/ton on August 11th and 9633 yuan/ton on August 18th, an increase of 1.05%. HDPE (2426H) had an average price of 7987 yuan/ton on August 11th and 8012 yuan/ton on August 18th, an increase of 0.31%.
Recently, polyethylene has been mainly operating in a narrow and strong range. On the supply side, there has been an increase in device maintenance, which has eased the supply pressure to some extent. On the demand side, downstream factories have increased their intention to replenish inventory, and the peak season of “Golden September and Silver October” is gradually approaching, with positive expectations on the demand side. On the cost side, the geopolitical situation is expected to further ease, coupled with the International Energy Agency’s downward adjustment of global demand growth forecasts and the decline in international oil prices, the cost side support is weak. The favorable domestic policies provide certain support for the polyethylene market.
Positive news is expected to boost, with polyethylene showing a narrow but strong trend.

This week (August 11-15, 2025), the market price of the main raw material dissolving slurry remained stable, with limited support on the cost side and little fluctuation in industry supply. Some manufacturers had low inventory, and downstream markets mainly executed a new round of orders. The overall market speed was stable, and industry sentiment was strong in supporting prices. There was an increase in high priced goods on site, and the price center of the adhesive short fiber market slightly increased.
According to the Commodity Market Analysis System of Shengyi Society, the market price of viscose staple fiber has slightly increased this week. As of August 15th, the average market price of viscose staple fiber is 13040 yuan/ton, an increase of 60 yuan/ton compared to the same period last week, with a weekly increase of 0.46%.
In terms of cost: Last week (August 11-15, 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 now, 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.