Cellulose-reinforced polypropylene resin composite material, preparation method therefor and use thereof

Patent metadata

Field	Value
Publication number	US-11845856-B2
Application number	US-202218085417-A
Country	US
Kind code	B2
Filing date	Dec 20, 2022
Priority date	May 7, 2021
Publication date	Dec 19, 2023
Grant date	Dec 19, 2023

Abstract

The invention relates to a cellulose-reinforced polypropylene resin composite material, a preparation method therefor and use thereof. The cellulose-reinforced polypropylene resin composite material comprises, relative to the total weight of the composite material: 65 wt % to 85 wt % of polypropylene resin; 10 wt % to 20 wt % of a cellulose filler; and 1 wt % to 10 wt % of dyed rayon, wherein the color of the dyed rayon is different from that of the polypropylene resin. The cellulose-reinforced polypropylene resin composite material of the invention is environmentally friendly and simple to process, and has a simple molding process. The article prepared therefrom has excellent physical and chemical properties, uniform matte appearance and two-color effect.

First claim

The invention claimed is:

1. A cellulose-reinforced polypropylene resin composite material, wherein it comprises, relative to the total weight of the cellulose-reinforced polypropylene resin composite material:
65 wt % to 85 wt % of polypropylene resin;
10 wt % to 20 wt % of a cellulose filler; and
1 wt % to 10 wt % of dyed rayon,
wherein
the color of the dyed rayon is different from that of the polypropylene resin,
the cellulose filler is white or light colored without dyeing,
the cellulose filler is different than the dyed rayon,
the cellulose filler has a diameter ranging from 40 to 60 μm, and a length ranging from 0.7 to 1 mm,
the dyed rayon has a diameter ranging from 10 to 20 μm, and a length ranging from 0.3 to 0.8 mm.

2. The cellulose-reinforced polypropylene resin composite material according to claim 1 , wherein the cellulose filler is derived from one or more of wood, cotton, wheat straw, hemp and rice straw.

3. The cellulose-reinforced polypropylene resin composite material according to claim 1 , wherein the content of the dyed rayon is 2 wt % to 9 wt % relative to the total weight of the composite material.

4. The cellulose-reinforced polypropylene resin composite material according to claim 1 , wherein the cellulose-reinforced polypropylene resin composite material also comprises a pigment.

5. The cellulose-reinforced polypropylene resin composite material according to claim 4 , wherein the content of the pigment is 1 wt % to 6 wt % relative to the total weight of the composite material.

6. The cellulose-reinforced polypropylene resin composite material according to claim 1 , wherein the cellulose-reinforced polypropylene resin composite material also comprises an additive selected from: antioxidants, light stabilizers, mold release agents, free radical scavengers and compatibilizers.

7. A method for preparing the cellulose-reinforced polypropylene resin composite material according to claim 1 , wherein the corresponding raw materials are mixed, melted, extruded, cooled and granulated.

8. An article, wherein it is prepared from the cellulose-reinforced polypropylene resin composite material according to claim 1 .

9. The article according to claim 8 , wherein the article is an automobile interior or exterior trim part.

Assignees

• Nio Technology Anhui Co Ltd

Inventors

• Zhang Yihan
• Waser Stephanie

Classifications

• C08L23/12 Primary

  Polypropene · CPC title

• C08L2205/025

  containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title

• C08L2205/03

  containing three or more polymers in a blend · CPC title

• C08J5/045 Primary

  with vegetable or animal fibrous material · CPC title

• C08L23/10 Primary

  Homopolymers or copolymers of propene · CPC title