Influence of fibre length and filler particle size on pore structure and mechanical strength of filler-containing paper

✍ Scribed by Noriyoshi Kinoshita; Hideo Katsuzawa; Satoko Nakano; Hiroki Muramatsu; Jyunko Suzuki; Yuko Ikumi; Yukie Toyotake

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 853 KB
• Volume: 78
• Category: Article
• ISSN: 0008-4034
• DOI: 10.1002/cjce.5450780515

✦ Synopsis

Abstract

Test sheets were prepared by incorporating softwood pulp with silica filler, PW‐5 (diameter 4.5 μm) or PW‐20 (15 μm). Length‐weighted averages of fibre were 2.5 (uncut fibre) and 1.25 mm (short‐cut fibre). Pore sizes less than 150 urn were measured by mercury porosimeter. Sheets of short‐cut fibres and mixed with uncut fibres at ratio of 3:1 or 1:3 had larger pore volumes than others tested. When filler content increased, the total pore volume increased for PW‐20 sheets, but it did not for PW‐5 sheets with short‐cut fibres. Tensile index and folding endurance were very much affected by fibre length. Contact number on a fibre was calculated by computer simulation, and it had a linear relation with tensile index of sheet.