Title:
PRODUCTION OF UNBLEACHED KRAFT PAPER FOR HEAVY-DUTY BAGS
Document Type and Number:
Japanese Patent JP2739799
Kind Code:
B2
Abstract:
PURPOSE: To provide a production process for unbleached kraft paper which can give heavy-duty bags resisting slippage even when they are filled with the powder product and piled up without coating a slip-proof agent in the process stage of the paper making or bag making.
CONSTITUTION: The unbleached kraft paper is made by adding a filler consisting of a hydrated silicate salt containing at least 80wt.% of particles of 1 to 30μm particle sizes and less than 0.4wt.% of particles of 5 to 10μm sizes, in an amount of 0.2 to 3wt.% based on the weight of the absolutely dried pulp. The unbleached kraft paper has more than 30° sliding angle according to JISP 8147 before bag making and can keep over 25° even after printing or bag making.
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Inventors:
Kata Satayuki
Hirokazu Ishii
Takahide Matsumoto
Kenzo Kiyota
Hirokazu Ishii
Takahide Matsumoto
Kenzo Kiyota
Application Number:
JP12029492A
Publication Date:
April 15, 1998
Filing Date:
May 13, 1992
Export Citation:
Assignee:
Oji Paper Co.,Ltd.
International Classes:
D21H21/14; D21H11/00; D21H11/04; D21H17/67; D21H21/50; D21H27/00; (IPC1-7): D21H21/14; D21H11/04; D21H17/67
Domestic Patent References:
| JP160183B2 | ||||
| JP5618712B2 |
Other References:
米谷稔、中西篤、太田節三著「印刷用紙」、改訂第２刷、印刷学会出版部、昭４２年９月、ｐ．２６−２９
Attorney, Agent or Firm:
Yukio Ogata