公开(公告)号：US4180434A

公开(公告)日：1979-12-25

申请号：US862272

申请日：1977-12-15

申请人： Jean A. Ciani ,  Ernst Diehl ,  Berno Haberthur

发明人： Jean A. Ciani ,  Ernst Diehl ,  Berno Haberthur

IPC分类号： D21H13/44 ,  D21H3/66

CPC分类号： D21H13/44

摘要： A novel electrically insulating mica paper containing cellulose, but no binding agent and having a tensile strength and a porosity higher than those of pure mica paper is disclosed. The tensile strength is sufficiently high for the mica paper to be processed without backing. The novel mica paper contains mica pulp consisting of platelets of natural mica and 10 to 50% by weight, preferably 20 to 30% by weight, of cellulose fibres which preferably have a freeness of 20 to 60 on the Schopper-Riegler scale. It can be produced by adding cellulose fibres to mica pulp produced without using chemicals other than water and processing the mixed pulp by conventional methods to a paper, without using a binding agent, temperatures higher than 100.degree. C. or pressure.

摘要翻译： 公开了一种含有纤维素但不含粘合剂并具有比纯云母纸的拉伸强度和孔隙率高的新型电绝缘云母纸。 对于云母纸的加工而言，抗拉强度足够高。 该新型云母纸包含由天然云母的血小板和10至50重量％，优选20至30重量％的纤维素纤维组成的云母纸浆，其优选在Schopper-Riegler规模上具有20至60的游离度。 可以通过将纤维素纤维加入到不用水以外的化学品生产的云母纸浆中，并且通过常规方法将纸浆加工成纸，而不使用粘合剂，温度高于100℃或压力可以制备。