双欣环保：产品PVB功能性膜主要在层压安全玻璃制造中作为中间粘合薄膜层

Group 1 - The core viewpoint of the article is that Shuangxin Environmental Protection has clarified the application of its PVB functional film, which is primarily used as an interlayer in laminated safety glass manufacturing [2] - The PVB functional film can be utilized in various fields including automotive, high-rise buildings, aviation, and marine [2]