Group 1 - Jiangsu Heshili New Materials Co., Ltd. has obtained a patent for "an anti-aging and yellowing resistant foamed polyester material and its preparation method," with authorization announcement number CN119463424B, applied on October 2024 [1] - Jiangsu Heshili New Materials Co., Ltd. was established in 2006, located in Wuxi City, primarily engaged in the manufacturing of chemical raw materials and chemical products, with a registered capital of 85.05336 million RMB [1] - The company has made investments in 3 enterprises, participated in 13 bidding projects, holds 14 trademark registrations, 110 patent registrations, and possesses 28 administrative licenses [1] Group 2 - Zhangjiagang Hekexin Materials Technology Co., Ltd. was established in 2024, located in Lianyungang City, primarily engaged in technology promotion and application services, with a registered capital of 260 million RMB [1] - The company has participated in 4 bidding projects, holds 4 patent registrations, and possesses 1 administrative license [1]

Group 1 - The core point of the article is that Qingdao Zhiyong New Materials Technology Co., Ltd. has obtained a patent for a method of preparing acid-resistant poly sulfone composite membranes with a sacrificial layer, with the patent announcement number CN115591419B and application date of September 2022 [1] - Qingdao Zhiyong New Materials Technology Co., Ltd. was established in 2015 and is located in Qingdao City, primarily engaged in the manufacturing of chemical raw materials and chemical products [1] - The company has a registered capital of 2.1 million USD and has made investments in one other enterprise, holds 13 patents, and possesses five administrative licenses according to data from Tianyancha [1]