Avient Protective Materials B.V. initiated an infringement action against Xingi Technology Co., Ltd. and Jiangsu Jiuzhou Xingji High-Performance Fiber Products Co., Ltd., collectively known as the Xingi Group. The case involves the alleged infringement of European patent n° 2 791 402, related to ultra-high molecular weight polyethylene (UHMWPE) multifilament yarn. Avient argued that Xingi Group's products, 'Xingi UD Fibers', 'Xingi UD Fabrics', and 'Xingi UD Panels', infringe claims 2-4, 8-10, and 12-15 of the patent respectively. Xingi Group responded with a counterclaim for revocation of the patent, citing invalidity. Avient further filed an application for evidence concerning the alleged infringement and requested the court to order the Xingi Group to produce relevant evidence. The decision emphasized the need for Xingi Group to provide ballistic performance data and samples for testing to resolve issues regarding claims 13-15.