公开(公告)号：US3803286A

公开(公告)日：1974-04-09

申请号：US20887471

申请日：1971-12-16

申请人： MITSUBISHI RAYON CO

发明人： NAKATSUKA K ,  MINAMI S ,  MURASE K

IPC分类号： B29B7/00 ,  B29B15/00 ,  B29C47/00 ,  B29C47/54 ,  B29C47/92 ,  B29C55/00 ,  C08L33/20 ,  D01D5/00 ,  D01D5/42 ,  D01F6/18 ,  D04H1/50 ,  D21H13/18 ,  B29B1/12 ,  B29C3/00

CPC分类号： D21H5/205 ,  B29C47/92 ,  B29C2947/92514 ,  B29C2947/92704 ,  B29C2947/92895 ,  B29C2947/92904 ,  D01D5/423 ,  D01F6/18 ,  D01F6/38 ,  D01F6/54 ,  D21H13/18

摘要： A HIGHLY ORIENTED ACRYLONITRILE POLYMER PRODUCT COMPRISING ASSEMBLY OF ORIENTED FIBRILS CAN BE OBTAINED BY PREVIOUSLY MOLDING POLYACRYLONITRILE, ACRYLONITRILE COPOLYMER CONTAINING AT LEAST 75% BY WEIGHT OF ACRYLONTIRILE OR MIXTURE THEREOF INTO A BLOCK PRODUCT AND THEN EXTRUDING THE PRE-MOLDED ACRYLONITRILE POLYMER THROUGH A NOZZLE AT A RATIO EXPRESSED BY REDUCTION OF SECTIONAL AREA OF AT LEAST 3.5 AT A PRESSURE OF 100 TO 50,000 KG./CM.2 AT A TEMPERATURE OF 50* TO 300*C. THUS OBTAINED PRODUCT IS USEFUL AS RAW MATERIALS FOR SYNTHETIC PAPER, NONWOVEN FABRICS, COMPOSITE MATERIALS ETC.