Title:
紙及び板紙の製造
Document Type and Number:
Japanese Patent JP3764388
Kind Code:
B2
Abstract:
A process of making paper or paper board comprising forming a cellulosic suspension, flocculating the suspension, mechanically shearing the suspension and optionally reflocculating the suspension, draining the suspension on a screen to form a sheet and then drying the sheet,wherein the suspension is flocculated or reflocculated by introducing a water-soluble polymer of intrinsic viscosity above 3 dl/g into the suspension, characterized in that the water soluble polymer exhibits a rheological oscillation value of tan delta at 0.005 Hz of above 1.1. The process has the advantage of improving retention.
Inventors:
Hard, michael barry
Chen, Gordon Chen First
Chen, Gordon Chen First
Application Number:
JP2001536820A
Publication Date:
April 05, 2006
Filing Date:
November 02, 2000
Export Citation:
Assignee:
Ciba Specialty Chemicals Water Treatments Limited
International Classes:
D21H21/10; C08F220/56; D21H17/37; D21H17/66; D21H17/68; D21H23/14; D21H23/76; C08F220/60; D21H17/45
Domestic Patent References:
| JP9176989A | ||||
| JP9031885A | ||||
| JP6015755B2 | ||||
| JP9031885A | ||||
| JP2595257B2 | ||||
| JP3689042B2 |
Foreign References:
| WO1998029604A1 | ||||
| WO1998024973A1 |
Attorney, Agent or Firm:
Hajime Tsukuni
Koshiro Tsukuda
Koshiro Tsukuda