Title:
CARDBOARD LINER
Document Type and Number:
WIPO Patent Application WO/2022/107733
Kind Code:
A1
Abstract:
This cardboard liner according to one aspect comprises at least a front surface layer, a middle layer, and a rear surface layer. The front surface layer contains softwood kraft pulp. The softwood kraft pulp content of the front surface layer is 80% by mass or greater. The middle layer contains cardboard waste paper pulp and the softwood kraft pulp content of the middle layer is 30% by mass or less. The rear surface layer contains the softwood kraft pulp, the cardboard waste paper pulp, and kraft-type waste paper pulp. The kraft-type waste paper pulp is waste paper pulp derived from kraft paper having a plastic film laminated on one surface thereof. The cardboard waste paper pulp content of the rear surface layer is 30% to 70% by mass (inclusive). The ratio of the basis weight of the front surface layer in relation to the total basis weight is 20% to 35% (inclusive). It is preferable that the burst index of the cardboard liner in an atmosphere that is 60°C and 80% RH be 3.4 kPa·m2/g or greater.
Inventors:
KAWABAYASHI ATSUSHI (JP)
Application Number:
PCT/JP2021/041976
Publication Date:
May 27, 2022
Filing Date:
November 15, 2021
Export Citation:
Assignee:
DAIO SEISHI KK (JP)
International Classes:
D21H27/00; B65D65/40; D21H11/14; D21H19/10
Foreign References:
| JP2005200773A | 2005-07-28 | |||
| JP2005200772A | 2005-07-28 | |||
| JP2002249997A | 2002-09-06 | |||
| JP2010222755A | 2010-10-07 | |||
| JP2009235636A | 2009-10-15 |
Attorney, Agent or Firm:
AMANO Kazunori (JP)
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