Sinopec's self-developed PBST product is successfully applied on an industrial scale for the first time in downstream processing.

On March 28, the first batch of qualified PBST modified material, processed by a renowned modification company commissioned by Sinopec Chemical Sales South China Branch, departed from Hainan and was shipped to Xinjiang for the production of biodegradable agricultural mulch films. This batch will be used to support a 10,000-mu (approximately 667 hectares) cotton trial field demonstration in Wusu City and the Xinjiang Production and Construction Corps. This marks the first successful large-scale application of Sinopec's self-developed PBST product in downstream processing.

The PBST (Polybutylene Succinate Terephthalate) product produced by Hainan Polyester Company, as a new type of fully biodegradable material, is one of the top ten key research projects of the group company. It exhibits excellent thermal stability, mechanical properties, and biodegradability, and can be widely applied in disposable daily necessities, plastic bags, packaging materials, agricultural films, and other fields.

To ensure the smooth market launch of the product, the Huazhong South Chemical Sales Department specially established a project task force to actively collect downstream customer demands, having surveyed over 200 customers in the biodegradable industry and visited more than 120 relevant customers in person. After the qualified PBST products were successfully produced, they were immediately shipped to leading downstream enterprises in Hainan Province for testing. The production, sales, and research teams were fully coordinated to track the process, ensuring seamless production-sales connection and continuously optimizing product parameters. Additionally, technical support throughout the entire process, including modified processing and film blowing techniques, was provided on-site at the customers' production workshops to ensure the timely production of qualified modified material products.

Next, Huaxiao South China will continue to monitor the use of mulch film in Xinjiang farmers' cotton fields. Through an online and offline collaborative service mechanism, they will dynamically optimize product performance to contribute positively to the group company's green and high-quality development.