聚烯烃日报：需求跟进偏慢，盘面窄幅波动-20250911

Report Industry Investment Rating - Unilateral: Neutral; Inter - period: 01 - 05 reverse spread; Inter - variety: Long L - P [3] Core View - The downstream demand is in the transition period between the seasonal peak and off - peak seasons of "Golden September and Silver October". The operating rates of downstream industries such as agricultural films and packaging films show a slight upward trend, while those of plastic weaving and BOPP films are flat month - on - month. The overall demand follows up slowly. Multiple PE plants are under maintenance, and the overall operating rate decreases slightly, with the supply pressure expected to ease slightly. New PP production capacity is being released. The upstream production inventory increases slightly, the inventory in the middle - stream decreases, and the downstream rigid demand procurement increases. With the arrival of the peak demand season in mid - to late September, the downstream operating rate is expected to rise, and the short - term supply - demand margin may improve. Crude oil is weakly consolidating, the profit of PDH - made PP is slightly in the red, and the maintenance volume of PDH plants increases [2] Summary by Relevant Catalogs I. Polyolefin Basis Structure - Analyze the trends of plastic and polypropylene futures main contracts and the basis between LL East China and the main contract, as well as PP East China and the main contract [8][11] II. Production Profit and Operating Rate - Include the production profit of LL (crude oil - based), PE operating rate, PE weekly output, PE maintenance loss, PP production profit (crude oil - based and PDH - based), PP operating rate, PP weekly output, PP maintenance loss, and PDH - made PP capacity utilization rate [16][19][27] III. Polyolefin Non - Standard Price Difference - Compare the price differences between HD injection molding - LL East China, HD blow molding - LL East China, HD film - LL East China, LD East China - LL, PP low - melt co - polymer - drawn wire East China, and PP homopolymer injection molding - drawn wire East China [26][33][34] IV. Polyolefin Import and Export Profit - Analyze the import and export profits of LL and PP, including LL import profit, LL price differences in different regions, PP import profit, PP export profit (to Southeast Asia), and price differences of PP homopolymer injection molding in different regions [39][52][59] V. Polyolefin Downstream Operating Rate and Downstream Profit - Cover the operating rates of PE downstream agricultural films, packaging films, and PP downstream plastic weaving, BOPP films, injection molding, as well as the production gross profits of PP downstream plastic weaving and BOPP films [56][63][70] VI. Polyolefin Inventory - Include the inventories of PE and PP in oil - based enterprises, coal - chemical enterprises, traders, and ports [72][76][81]