IP Library › Granted Patent US 12,351,985
Granted Patent B2
US 12,351,985 · App. 18/001,247 · Granted Jul 8, 2025

Coated paper

Inventors: Hirosuke Tsunoda (Tokyo, JP); Yoshio Yoshida (Tokyo, JP); Koji Kutsuwa (Tokyo, JP); Tetsuo Okura (Settu, JP); Yasunori Okada (Settu, JP); Asuka Fukutome (Settu, JP)
Assignees: NIPPON PAPER INDUSTRIES CO., LTD.; KANEKA CORPORATION
D21H19/22D21H19/58D21H19/60D21H21/16
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Quick Facts
Patent No.
US 12,351,985
App. No.
18/001,247
Granted
Jul 8, 2025
Kind
B2
Abstract

An object of the present invention is to provide a coated paper that includes a coating layer containing poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) with few coating defects. As a solution, the present invention provides a coated paper including a coating layer containing poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) and an adhesive, on at least one side of a paper substrate. A solid content weight ratio of the poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) to the adhesive in the coating layer is 99.9/0.1 to 60.0/40.0.

Claims (16)

1. A coated paper characterized in that:

the coated paper includes a coating layer comprising poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) and an adhesive, on at least one side of a paper base material,

wherein a solid content weight ratio of the poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) to the adhesive in the coating layer is in a range of 99.9/0.1 to 60.0/40.0,

the coating layer contains a fully-saponified polyvinyl alcohol as the adhesive and contains no surfactants,

a coating amount (dry weight) of the coating layer is in a range of 1.0 g/m 2 or more and 50.0 g/m 2 or less per one side, and

the coating layer is a heat-sealing, water-resistant, and oil-resistant layer.

2. The coated paper according to claim 1 , characterized in that a grammage of the paper base material is in a range of 20 g/m 2 or more and 600 g/m 2 or less as measured in accordance with JIS P 8124.

3. The coated paper according to claim 1 , characterized in that the paper base material has the coating layer comprising the poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) and the adhesive, on both sides of the paper base material.

4. The coated paper according to claim 1 , characterized by further comprising a seal layer between the paper base material and the coating layer.

5. The coated paper according to claim 4 , characterized in that a coating amount (dry weight) of the seal layer is in a range of 3.0 g/m 2 or more and 15.0 g/m 2 or less per one side.

6. The coated paper according to claim 1 , which is formed as a paper cup.

7. The coated paper according to claim 1 , which is formed as a paper container.

8. The coated paper according to claim 1 , which is formed as a paper box.

9. The coated paper according to claim 1 , which is formed as a paper plate.

10. The coated paper according to claim 1 , which is formed as a paper tray.

11. The coated paper according to claim 6 , wherein a grammage of the paper base material is in a range of 150 g/m 2 or more and 300 g/m 2 or less as measured in accordance with JIS P 8124.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 8, 2022
From: TSUNODA, HIROSUKE; YOSHIDA, YOSHIO; KUTSUWA, KOJI; OKURA, TETSUO; OKADA, YASUNORI; FUKUTOME, ASUKA
To: NIPPON PAPER INDUSTRIES CO., LTD.; KANEKA CORPORATION
Reel/Frame 062033/0309 →
Priority Claims (1)
JP 2020-104032 · Jun 16, 2020 · national
Continuity (1)
Related Publication 20230287626A1 · Sep 14, 2023
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