Fibrous cellulose-containing material and method for producing same, dried fibrous cellulose and method for producing same, and fibrous cellulose composite resin and method for producing same

Patent metadata

Field	Value
Publication number	US-12037482-B2
Application number	US-201917254031-A
Country	US
Kind code	B2
Filing date	Jul 3, 2019
Priority date	Jul 13, 2018
Publication date	Jul 16, 2024
Grant date	Jul 16, 2024

Abstract

A fibrous cellulose-containing material which is excellent in dispersibility of cellulose fiber, is easy to dewater, and is not required to contain an organic solvent, and a method for producing the same; and dried fibrous cellulose and a fibrous cellulose composite resin each obtained using the fibrous cellulose-containing material and a method for producing the same. A dispersion liquid of cellulose microfiber is prepared by fibrillating raw material pulp to the extent that the average fiber width is 0.1 μm or more, a fibrous cellulose-containing material is prepared by mixing the dispersion liquid with resin powder having an average particle size of 1 to 1,500 μm, dried fibrous cellulose is prepared by drying the fibrous cellulose-containing material, and the dried fibrous cellulose is kneaded to obtain a fibrous cellulose composite resin.

First claim

The invention claimed is:

1. A fibrous cellulose-containing material comprising
cellulose microfiber having an average fiber length of 0.02 to 3.0 mm, a pulp viscosity of more than 4 cps, and a fibrillation ratio of 1.0% to 8.37%; and resin powder having an average particle size of 1 to 1,500 μm.

2. The fibrous cellulose-containing material according to claim 1 ,
wherein the combination ratio of the resin powder is 10 to 100,000 parts by mass based on 100 parts by mass of the cellulose microfiber.

3. The fibrous cellulose-containing material according to claim 2 ,
wherein the cellulose microfiber has an average fiber width of 0.1 m or more, and
wherein a ratio of the cellulose microfiber to all raw material fiber is at least 60% by mass.

4. The fibrous cellulose-containing material according to claim 2 ,
wherein the cellulose microfiber is modified with a polybasic acid, and/or
the fibrous cellulose-containing material contains a polybasic acid.

5. The fibrous cellulose-containing material according to claim 1 ,
wherein the cellulose microfiber has an average fiber width of 0.1 m or more, and
wherein a ratio of the cellulose microfiber to all raw material fiber is at least 60% by mass.

6. The fibrous cellulose-containing material according to claim 5 ,
wherein the cellulose microfiber is modified with a polybasic acid, and/or
the fibrous cellulose-containing material contains a polybasic acid.

7. The fibrous cellulose-containing material according to claim 1 ,
wherein the cellulose microfiber is modified with a polybasic acid, and/or
the fibrous cellulose-containing material contains a polybasic acid.

8. Dried fibrous cellulose formed by drying a fibrous cellulose-containing material comprising
cellulose microfiber having an average fiber length of 0.02 to 3.0 mm, a pulp viscosity of more than 4 cps, and a fibrillation ratio of 1.0% to 8.37%; and a resin powder having an average particle size of 1 to 1,500 μm.

9. A fibrous cellulose composite resin formed by kneading a dried fibrous cellulose-containing material comprising
cellulose microfiber having an average fiber length of 0.02 to 3.0 mm, a pulp viscosity of more than 4 cps, and a fibrillation ratio of 1.0% to 8.37%; and a resin powder having an average particle size of 1 to 1,500 μm.

10. A method for producing a fibrous cellulose-containing material, comprising:
preparing a dispersion liquid of cellulose microfiber by fibrillating raw material pulp to the extent that the average fiber length is 0.02 to 3.0 mm, a pulp viscosity is more than 4 cps, and a fibrillation ratio is 1.0% to 8.37%; and
mixing the dispersion liquid with resin powder having an average particle size of 1 to 1,500 μm.

11. A method for producing dried fibrous cellulose, comprising:
preparing a dispersion liquid of cellulose microfiber by fibrillating raw material pulp to the extent that the average fiber length is 0.02 to 3.0 mm, a pulp viscosity is more than 4 cps, and a fibrillation ratio is 1.0% to 8.37%;
preparing a fibrous cellulose-containing material by mixing the dispersion liquid with resin powder having an average particle size of 1 to 1,500 km; and
concentrating the fibrous cellulose-containing material to a water content ratio of 95% or less, and then performing drying.

12. A method for producing a fibrous cellulose composite resin, comprising:
preparing a dispersion liquid of cellulose microfiber by fibrillating raw material pulp to the extent that the average fiber length is 0.02 to 3.0 mm, a pulp viscosity is more than 4 cps, and a fibrillation ratio is 1.0% to 8.37%;
preparing a fibrous cellulose-containing material by mixing the dispersion liquid with resin powder having an average particle size of 1 to 1,500 μm;
preparing dried fibrous cellulose by drying the fibrous cellulose-containing material; and
kneading the dried fibrous cellulose.

13. The method for producing a fibrous cellulose composite resin according to claim 12 ,
wherein the dried fibrous cellulose and a resin pellet are kneaded,
the dried fibrous cellulose contains resin powder at a combination ratio of 10,000 parts by mass or less based on 100 parts by mass of the cellulose microfiber, and
the combination ratio of the resin pellet is 10 to 100,000 parts by mass based on 100 parts by mass of the resin powder.

Assignees

• Daio Seishi Kk

Inventors

• Matsusue Ikko

Classifications

• C08B3/12

  of polybasic organic acids · CPC title

• C08B15/00

  Preparation of other cellulose derivatives or modified cellulose {, e.g. complexes} · CPC title

• C08B3/20

  Esterification with maintenance of the fibrous structure of the cellulose (surface esterification of textiles D06M13/00) · CPC title

• C08L101/00

  Compositions of unspecified macromolecular compounds · CPC title

• C08J5/06

  using pretreated fibrous materials · CPC title