Cellulose-fiber-dispersing polyolefin resin composite material

Patent metadata

Field	Value
Publication number	US-11466145-B2
Application number	US-202016797938-A
Country	US
Kind code	B2
Filing date	Feb 21, 2020
Priority date	Aug 23, 2017
Publication date	Oct 11, 2022
Grant date	Oct 11, 2022

Abstract

A cellulose-fiber-dispersing polyolefin resin composite material, containing a polyolefin resin and a cellulose fiber dispersed in the polyolefin resin, in which the composite material contains the cellulose fiber of 3 mass % or more and less than 70 mass %, and when the composite material is subjected to the abrasion test according to ISO 6722 under the following test conditions, the amount of abrasion after 5,000 reciprocations satisfies the [Formula 1]: (Amount of abrasion [mm] of the cellulose-fiber-dispersing polyolefin resin composite material)<−0.003×(Cellulose effective mass ratio of the cellulose-fiber-dispersing polyolefin resin composite material)+0.3,
[Test Conditions for Abrasion Test]
Load: 1.7 kg, Needle diameter: φ0.45 mm, Stroke length: 10 mm, Period: 60 reciprocations/min, Test piece: length 38 mm×width 6 mm×thickness 1 mm, Temperature: 23° C.

First claim

The invention claimed is:

1. A cellulose-fiber-dispersing polyolefin resin composite material, comprising:
a polyolefin resin;
a cellulose fiber dispersed in the polyolefin resin, and
aluminum dispersed in the polyolefin resin,
wherein the content of the cellulose fiber is 3 mass % or more and less than 70 mass %, and
wherein when the composite material is subjected to the abrasion test according to ISO 6722 under the following test conditions, the amount of abrasion after 5,000 reciprocations satisfies the following formula:
(Amount of abrasion [mm] of the cellulose-fiber-dispersing polyolefin resin composite material)<−0.003×(Cellulose effective mass ratio of the cellulose-fiber-dispersing polyolefin resin composite material)+0.3,  [Formula 1]

[Test conditions for abrasion test]
Load: 1.7 kg, Needle diameter: φ0.45 mm, Stroke length: 10 mm, Period: 60 reciprocations/min, Test piece: length 38 mm×width 6 mm×thickness 1 mm, Temperature: 23° C.

2. The cellulose-fiber-dispersing polyolefin resin composite material according to claim 1 , wherein the content of the cellulose fiber in the cellulose-fiber-dispersing polyolefin resin composite material is 5 mass parts or more and less than 50 mass parts.

3. The cellulose-fiber-dispersing polyolefin resin composite material according to claim 1 , wherein the cellulose fiber comprises a cellulose fiber having a fiber length of 0.3 mm or more.

4. The cellulose-fiber-dispersing polyolefin resin composite material according to claim 1 , wherein a moisture content is less than 1 mass %.

5. The cellulose-fiber-dispersing polyolefin resin composite material according to claim 1 , wherein the polyolefin resin is a polyethylene resin.

6. The cellulose-fiber-dispersing polyolefin resin composite material according to claim 5 , wherein the polyethylene resin is a low density polyethylene resin.

7. The cellulose-fiber-dispersing polyolefin resin composite material according to claim 1 , wherein the polyolefin resin is a polypropylene resin.

8. The cellulose-fiber-dispersing polyolefin resin composite material according to claim 1 , wherein a content of the aluminum in the cellulose-fiber-dispersing polyolefin resin composite material is 1 mass % or more and 30 mass % or less.

9. The cellulose-fiber-dispersing polyolefin resin composite material according to claim 1 , comprising polyethylene terephthalate and/or nylon,
wherein a total content of the polyethylene terephthalate and/or the nylon is 10 mass parts or less based on a total content of 100 mass parts of the polyolefin resin and the cellulose fiber.

10. The cellulose-fiber-dispersing polyolefin resin composite material according to claim 1 , wherein at least a part of the polyolefin resin and the cellulose is derived from at least one of (i) a polyolefin laminated paper having paper and a polyolefin thin film layer; (ii) a polyolefin laminated paper having paper, a polyolefin thin film layer and an aluminum thin film layer; (iii) a cellulose-fiber-adhering polyolefin thin film piece; and (iv) a cellulose-fiber-aluminum-adhering polyolefin thin film piece.

11. A cellulose-fiber-dispersing polyolefin resin composite material, comprising:
a polyolefin resin;
a cellulose fiber dispersed in the polyolefin resin, and
aluminum dispersed in the polyolefin resin,
wherein the content of the cellulose fiber is 3 mass % or more and less than 70 mass %, and
wherein when the composite material is subjected to the abrasion test according to ISO 6722 under the following test conditions, the amount of abrasion after 5,000 reciprocations satisfies the following formula:
(Amount of abrasion [mm] of the cellulose-fiber-dispersing polyolefin resin composite material)/(Amount of abrasion [mm] of simple substance of the polyolefin resin composing the cellulose-fiber-dispersing polyolefin resin composite material [mm])<−0.01×(Cellulose effective mass ratio of the cellulose-fiber-dispersing polyolefin resin composite material)+1,  [Formula 2]

[Test conditions for abrasion test]
Load: 1.7 kg, Needle diameter: φ0.45 mm, Stroke length: 10 mm, Period: 60 reciprocations/min, Test piece: length 38 mm×width 6 mm×thickness 1 mm, Temperature: 23° C.

12. The cellulose-fiber-dispersing polyolefin resin composite material according to claim 11 , wherein a moisture content is less than 1 mass %.

13. The cellulose-fiber-dispersing polyolefin resin composite material according to claim 11 , wherein the polyolefin resin is a polyethylene resin.

Assignees

• Furukawa Electric Co Ltd

Inventors

• Hiroishi Jirou
• Hara Hidekazu
• Sawada Yuka
• Tazuke Masami
• Suzuki Toshihiro

Classifications

• C08L1/02

  Cellulose; Modified cellulose · CPC title

• C08L2207/20

  Recycled plastic · CPC title

• C08K2003/0812

  Aluminium · CPC title

• C08L23/06 Primary

  Polyethylene · CPC title

• C08L79/06

  Polyhydrazides; Polytriazoles; Polyamino-triazoles; Polyoxadiazoles · CPC title