Process for production of free standing film comprising cellulosic nanomaterial

The present invention is directed to a process for manufacturing a film or coating comprising high amounts of cellulosic nanomaterial. According to the present invention， a screen printing press， such as a rotary screen press， is used to create a film or coating comprising cellulosic nanomaterial. One benefit of the present process is that the suspension used in the printing process has a high dry content and high viscosity， thereby facilitating the process for manufacturing a film or coating comprising high amounts of cellulosic nanomaterial.

本发明涉及一种制备含高含量纤维素纳米材料（cellulosic nanomaterial）的薄膜或涂层的工艺。根据本发明，可采用丝网印刷机（screen printing press），例如轮转丝网印刷机（rotary screen press），来制备含纤维素纳米材料的薄膜或涂层。该工艺的一大优势在于，印刷环节所用的悬浮液具有较高的固含量（dry content）与粘度（viscosity），从而有效简化了含高含量纤维素纳米材料的薄膜或涂层的制备流程。