Barrier Film, Layered Body, Packaging Container, And Packaging Product

Abstract: This barrier film comprises, in order: a substrate layer containing a polypropylene resin; an anchor coating layer; and an inorganic oxide layer. The substrate layer has a contact layer which is in contact with the anchor coating layer. When the softening temperatures of the anchor coating layer and the contact layer are measured by local thermal analysis, the softening temperature T1 of the contact layer is lower than the softening temperature T2 of the anchor coating layer.

Patent Information

Application #

Filing Date

11 November 2025

Publication Number

52/2025

Publication Type

INA

Invention Field

POLYMER TECHNOLOGY

Status

Email

Parent Application

Applicants

TOPPAN HOLDINGS INC.

5-1, Taito 1-chome, Taito-ku, Tokyo 1100016

Inventors

1. FUKUGAMI Miki

c/o TOPPAN Holdings Inc., 5-1, Taito 1-chome, Taito-ku, Tokyo 1100016

2. YAMADA Mikinori

c/o TOPPAN Holdings Inc., 5-1, Taito 1-chome, Taito-ku, Tokyo 1100016

3. MAEDA Masaki

c/o TOPPAN Holdings Inc., 5-1, Taito 1-chome, Taito-ku, Tokyo 1100016

Specification

Documents

Application Documents

#	Name	Date
1	202547109400-STATEMENT OF UNDERTAKING (FORM 3) [11-11-2025(online)].pdf	2025-11-11
2	202547109400-REQUEST FOR EXAMINATION (FORM-18) [11-11-2025(online)].pdf	2025-11-11
3	202547109400-PROOF OF RIGHT [11-11-2025(online)].pdf	2025-11-11
4	202547109400-PRIORITY DOCUMENTS [11-11-2025(online)].pdf	2025-11-11
5	202547109400-FORM 18 [11-11-2025(online)].pdf	2025-11-11
6	202547109400-FORM 1 [11-11-2025(online)].pdf	2025-11-11
7	202547109400-DRAWINGS [11-11-2025(online)].pdf	2025-11-11
8	202547109400-DECLARATION OF INVENTORSHIP (FORM 5) [11-11-2025(online)].pdf	2025-11-11
9	202547109400-COMPLETE SPECIFICATION [11-11-2025(online)].pdf	2025-11-11
10	202547109400-Proof of Right [12-11-2025(online)].pdf	2025-11-12
11	202547109400-FORM-26 [12-11-2025(online)].pdf	2025-11-12