GAS BARRIER FILM, MANUFACTURING METHOD THEREOF, AND SUBSTRATE FOR ELECTRONIC ELEMENT USING THE SAME

• US 20140234640A1
• Filed: 08/24/2012
• Published: 08/21/2014
• Est. Priority Date: 08/31/2011
• Status: Abandoned Application

• Current Assignee: Konica Minolta Inc.
• Original Assignee: Konica Minolta Inc.
• Inventors: Kohno, Junichi, Ezure, Hidetoshi
• Application Number:
  US14/241,201
• Publication Number:
  US 20140234640A1
• Time in Patent Office: Days
• US Class Current: 428/452
• CPC Class Codes: B29C 41/24 for making articles of indefinite length
• CPC Class Codes: B29C 48/08 flexible, e.g. films
• CPC Class Codes: B29C 48/21 the layers being joined at their surfaces
• CPC Class Codes: B29C 55/12 biaxial
• CPC Class Codes: B29K 2001/08 Cellulose derivatives
• CPC Class Codes: B29K 2995/0067 non-permeable
• CPC Class Codes: B29K 2995/0069 non-permeable
• CPC Class Codes: G02B 1/14 Protective coatings, e.g. hard coatings
• CPC Class Codes: Y10T 428/31975 Of cellulosic next to another carbohydrate

Abstract

Provided are a gas barrier film which has excellent transparency, surface smoothness, gas barrier property and adhesivity and a manufacturing method thereof, and a substrate for an electronic element using the same. The gas barrier film of the present invention has a sheet substrate which contains a surface-modified cellulose nanofiber in which at least a part of hydrogen atoms in a hydroxyl group in a cellulose nanofiber are substituted with acyl groups each having 1 to 8 carbon atoms and has a content of a matrix resin of 10% by mass or less with respect to the total amount of the cellulose nanofiber and the matrix resin, and a gas barrier layer which is formed on at least one surface of the sheet substrate. The manufacturing method of the gas barrier film of the present invention has a step A of obtaining surface-modified cellulose nanofiber by substituting as least a part of hydrogen atoms in a hydroxyl group in the cellulose nanofiber with acyl groups each having 1 to 8 carbon atoms and forming the surface-modified cellulose nanofiber into a film by a melt extrusion method or a solution casting method, and a step B of forming a bas barrier layer on the sheet substrate.

Claims

1. A gas barrier film comprising a sheet substrate which contains a surface-modified cellulose nanofiber in which at least a part of hydrogen atoms in a hydroxyl group in a cellulose nanofiber are substituted with acyl groups each having 1 to 8 carbon atoms and has a content of a matrix resin of 10% by mass or less with respect to the total amount of the cellulose nanofiber and the matrix resin, and

a gas barrier layer which is formed on at least one surface of the sheet substrate.

2. The gas barrier film according to claim 1, wherein the acyl group comprises a propanoyl group.

3. The gas barrier film according to claim 1, wherein the gas barrier layer comprises at least one of silicon oxide, silicon nitride oxide and silicon oxynitride.

7. A substrate for an electronic element using the gas barrier film according to claim 1.

4. A manufacturing method of a gas barrier film, comprising a step A of obtaining a surface-modified cellulose nanofiber by substituting at least a part of hydrogen atoms in a hydroxyl group in a cellulose nanofiber with acyl groups each having 1 to 8 carbon atoms and forming the surface-modified cellulose nanofiber into a film by a melt extrusion method or a solution cast method, and

a step B of forming a gas barrier layer on the sheet substrate.

5. The manufacturing method according to claim 4, wherein a stretching treatment or/and a heat calendering treatment are performed after film formation in the step A.

6. The manufacturing method according to claim 4, wherein the step B comprises an excimer irradiation treatment after applying a coating liquid containing a polysilazane compound onto the sheet substrate.

8. A substrate for an electronic element using a gas barrier film which is manufactured by the manufacturing method according to claim 4.