Title:
WATER-RESISTANT PAPER AND PACKAGING CONTAINER
Document Type and Number:
WIPO Patent Application WO/2023/248981
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing: water-resistant paper that has excellent water resistance, anti-blocking properties, moldability, and heat-sealing properties; and a packaging container obtained by using the water-resistant paper. A water-resistant paper according to the present invention has a water-resistant layer as the uppermost layer on at least one surface of a paper base. The water-resistant layer has at least two melting points. The first melting point is not lower than 75°C but lower than 100°C. The second melting point is 100-120°C. The water-resistant layer contains an ethylene-(meth)acrylic acid copolymer and a copolymer of ethylene and an unsaturated hydrocarbon other than ethylene. The mass ratio (ethylene-(meth)acrylic acid copolymer/copolymer of ethylene and n unsaturated hydrocarbon other than ethylene) of the ethylene-(meth)acrylic acid copolymer with respect to the copolymer of ethylene and an unsaturated hydrocarbon other than ethylene in the water-resistant layer is 50/50 to 90/10. The coated amount of the water-resistant layer per surface is at least 3.0 g/m2. A pigment coating layer containing a pigment and a binder is provided between the paper base and the water-resistant layer.
Inventors:
MIURA TAKAHIRO (JP)
ISOZAKI TOMOFUMI (JP)
MATSUMOTO AYAKA (JP)
AKAI SAWAKO (JP)
SEGAWA TAKAKO (JP)
KONDO MITSUTAKA (JP)
JIKIBARA TAKAYUKI (JP)
ISOZAKI TOMOFUMI (JP)
MATSUMOTO AYAKA (JP)
AKAI SAWAKO (JP)
SEGAWA TAKAKO (JP)
KONDO MITSUTAKA (JP)
JIKIBARA TAKAYUKI (JP)
Application Number:
PCT/JP2023/022622
Publication Date:
December 28, 2023
Filing Date:
June 19, 2023
Export Citation:
Assignee:
OJI HOLDINGS CORP (JP)
International Classes:
D21H19/82; B65D65/40; D21H19/20; D21H19/22; D21H19/58; D21H19/64
Foreign References:
| JP2022013542A | 2022-01-18 | |||
| JP2019002119A | 2019-01-10 | |||
| JP2009520117A | 2009-05-21 | |||
| JP2001355195A | 2001-12-26 |
Attorney, Agent or Firm:
OHTANI PATENT OFFICE (JP)
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