Oxygen absorbing resin composition, oxygen absorbing film, oxygen absorbing multi-layer film, and cover material

Patent metadata

Field	Value
Publication number	US-2024018317-A1
Application number	US-202118038751-A
Country	US
Kind code	A1
Filing date	Nov 15, 2021
Priority date	Nov 30, 2020
Publication date	Jan 18, 2024
Grant date	—

Abstract

An oxygen absorbing resin composition containing a polyolefin, an iron powder, titanium oxide, and calcium oxide, a content of the iron powder being from 10 to 50 mass % in the oxygen absorbing resin composition, a mass ratio of the titanium oxide to the iron powder [titanium oxide/iron powder] being from 0.1 to 0.5, and a mass ratio of the calcium oxide to the iron powder [calcium oxide/iron powder] being from 0.1 to 0.5.

First claim

1 . An oxygen absorbing resin composition comprising:
a polyolefin; an iron powder; titanium oxide; and calcium oxide, a content of the iron powder being from 10 to 50 mass % in the oxygen absorbing resin composition, a mass ratio of the titanium oxide to the iron powder [titanium oxide/iron powder] being from 0.1 to 0.5, and a mass ratio of the calcium oxide to the iron powder [calcium oxide/iron powder] being from 0.1 to 0.5.

2 . The oxygen absorbing resin composition according to claim 1 , wherein the mass ratio of the titanium oxide to the iron powder [titanium oxide/iron powder] is from 0.15 to 0.5.

3 . The oxygen absorbing resin composition according to claim 1 , wherein a mass ratio of the calcium oxide to the titanium oxide [calcium oxide/titanium oxide] is from 0.6 to 1.5.

4 . The oxygen absorbing resin composition according to claim 1 , wherein a content of the titanium oxide is from 1 to 15 mass % in the oxygen absorbing resin composition.

5 . The oxygen absorbing resin composition according to claim 1 , wherein a content of the calcium oxide is from 1 to 15 mass % in the oxygen absorbing resin composition.

6 . An oxygen absorbing film comprising the oxygen absorbing resin composition according to claim 1 .

7 . An oxygen absorbing multi-layer film comprising the oxygen absorbing film according to claim 6 as an oxygen absorbing layer.

8 . The oxygen absorbing multi-layer film according to claim 7 , comprising a multi-layer structure including a layer containing a polyolefin as a main component, an oxygen absorbing layer, and a gas barrier layer layered in this order.

9 . The oxygen absorbing multi-layer film according to claim 7 , wherein a thickness of the oxygen absorbing layer is from 10 to 200 μm.

10 . The oxygen absorbing multi-layer film according to claim 8 , wherein the gas barrier layer is a layer containing at least one selected from the group consisting of thin metal films, inorganic vapor-deposited films, ethylene-vinyl alcohol copolymers, and polyamide resins.

11 . The oxygen absorbing multi-layer film according to claim 7 , wherein the titanium oxide is only contained in the oxygen absorbing layer.

12 . A cover material comprising the oxygen absorbing multi-layer film according to claim 7 .

Assignees

• Mitsubishi Gas Chemical Co

Inventors

• Watanabe Keisuke
• Itou Yoshiki

Classifications

• C08J5/18 Primary

  Manufacture of films or sheets · CPC title

• C08K3/22

  of metals · CPC title

• C08K3/08 Primary

  Metals · CPC title

• B65D65/40

  Applications of laminates for particular packaging purposes {(B65D1/0215, B65D1/28, B65D3/22, B65D5/0281, B65D5/563, B65D9/30, B65D29/02, B65D31/02, B65D75/26, B65D77/2024, B65D81/1275, B65D81/3811, B65D81/3823, B65D81/3834, B65D81/3846, B65D81/3858, B65D81/3874, B65D81/3886, B65D81/3897 take precedence; laminates per se or laminated packages characterised by the composition or)} · CPC title

• B32B15/20 Primary

  comprising aluminium or copper {(B32B15/016 and B32B15/017 take precedence)} · CPC title