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Gas Barrier Film, Laminate, And Packaging Bag

Abstract: A gas barrier film according to one aspect of the present disclosure comprises: a substrate film that contains polypropylene; and a vapor deposition layer that contains an inorganic oxide and that is disposed on a first surface, which is one surface of the substrate film, wherein the substrate film is provided with a second skin layer that has a second surface, which is the surface on the opposite side from the first surface of the substrate film, and a core layer. The second skin layer contains 1500-4000 mass ppm of silicon-containing particles.

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Patent Information

Application #
Filing Date
08 December 2025
Publication Number
01/2026
Publication Type
INA
Invention Field
CHEMICAL
Status
Email
Parent Application

Applicants

TOPPAN HOLDINGS INC.
5-1, Taito 1-chome, Taito-ku, Tokyo 1100016

Inventors

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

Specification

Documents

Application Documents

# Name Date
1 202547123428-STATEMENT OF UNDERTAKING (FORM 3) [08-12-2025(online)].pdf 2025-12-08
2 202547123428-REQUEST FOR EXAMINATION (FORM-18) [08-12-2025(online)].pdf 2025-12-08
3 202547123428-PROOF OF RIGHT [08-12-2025(online)].pdf 2025-12-08
4 202547123428-PRIORITY DOCUMENTS [08-12-2025(online)].pdf 2025-12-08
5 202547123428-FORM 18 [08-12-2025(online)].pdf 2025-12-08
6 202547123428-FORM 1 [08-12-2025(online)].pdf 2025-12-08
7 202547123428-DRAWINGS [08-12-2025(online)].pdf 2025-12-08
8 202547123428-DECLARATION OF INVENTORSHIP (FORM 5) [08-12-2025(online)].pdf 2025-12-08
9 202547123428-COMPLETE SPECIFICATION [08-12-2025(online)].pdf 2025-12-08
10 202547123428-FORM-26 [09-12-2025(online)].pdf 2025-12-09
11 202547123428-Proof of Right [10-12-2025(online)].pdf 2025-12-10