Invention Grant
- Patent Title: Printing sheet
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Application No.: US09819517Application Date: 2001-03-28
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Publication No.: US06572951B2Publication Date: 2003-06-03
- Inventor: Makoto Hasegawa , Noriko Kumazawa , Akinobu Chatani , Nobuo Nakanishi , Ryuta Ono , Hiroki Yamamoto , Teruaki Ookawa , Yasuo Yamamoto
- Applicant: Makoto Hasegawa , Noriko Kumazawa , Akinobu Chatani , Nobuo Nakanishi , Ryuta Ono , Hiroki Yamamoto , Teruaki Ookawa , Yasuo Yamamoto
- Priority: JP2000-099434 20000331; JP2000-099439 20000331; JP2000-099442 20000331
- Main IPC: B32B310
- IPC: B32B310

Abstract:
A printing sheet which prevents setoff while transferring a sufficient quantity of ink and maintains necessary dot uniformity can be obtained by ensuring characteristics that the centerline average roughness showing the larger value is 1.0-3.5 &mgr;m and the ratio of centerline average obtained by dividing the larger value by the smaller value is less than 1.15 where said values are chosen at the point where the difference between the centerline average roughness in a certain direction and the centerline average roughness at right angles to said direction is maximal. Further, the abovementioned quality is further improved by appropriately ensuring that the oil absorbability is more than 4 mg/cm2 and less than 7 mg/cm2 when the contact time between the oil component having a surface tension of 27-30 mN/m at 20° C. and the printing sheet is 5 seconds and/or that the median pore diameter is 1.7-3.5 &mgr;m, in addition to the abovementioned characteristics.
Public/Granted literature
- US20020051865A1 Printing sheet Public/Granted day:2002-05-02
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