Granules containing complex fibers of fibers with inorganic particles

Patent metadata

Field	Value
Publication number	US-2022349118-A1
Application number	US-202017636330-A
Country	US
Kind code	A1
Filing date	Sep 15, 2020
Priority date	Sep 20, 2019
Publication date	Nov 3, 2022
Grant date	—

Abstract

The present invention aims to provide highly flowable granules comprising a complex fiber of a fiber with inorganic particles. Granules comprising a complex fiber of a fiber with inorganic particles are provided by the present invention. The granules of the present invention have a particle size of 0.1 to 10 mm and a water content of less than 60%.

First claim

1 . A granule comprising a complex fiber of a fiber with inorganic particles, and having a particle size of 0.1 to 10 mm and a water content of less than 60%.

2 . The granule of claim 1 , having an angle of repose of 30 to 58°.

3 . The granule of claim 1 , wherein the inorganic particles comprise a metal salt of calcium, magnesium, barium or aluminum, or metal particles containing titanium, copper or zinc, or a silicate.

4 . The granule of claim 1 , wherein the inorganic particles comprise hydrotalcite.

5 . The granule of claim 1 , wherein the mass fraction of the inorganic particles in the granule is 10% or more.

6 . The granule of claim 1 , wherein the fiber is a cellulose fiber.

7 . The granule of claim 1 , wherein 15% or more of the surface of the fiber is covered by the inorganic particles.

8 . A process for preparing the granule of claim 1 , comprising the steps of: synthesizing inorganic particles in a liquid containing a fiber to give a complex fiber; and granulating the complex fiber into granules having a particle size of 0.1 to 10 mm.

9 . The process of claim 8 , wherein the complex fiber is granulated while it is dried in the granulating step.

10 . The process of claim 8 , wherein the complex fiber is granulated after it has been adjusted to a water content of less than 60%.

11 . The process of claim 8 , wherein the complex fiber is granulated after it has been comminuted.

12 . The granule of claim 2 , wherein the inorganic particles comprise a metal salt of calcium, magnesium, barium or aluminum, or metal particles containing titanium, copper or zinc, or a silicate.

13 . The granule of claim 12 , wherein the inorganic particles comprise hydrotalcite.

14 . The granule of claim 13 , wherein the mass fraction of the inorganic particles in the granule is 10% or more.

15 . The granule of claim 14 , wherein the fiber is a cellulose fiber.

16 . The granule of claim 15 , wherein 15% or more of the surface of the fiber is covered by the inorganic particles.

17 . A process for preparing the granule of claim 16 , comprising the steps of: synthesizing inorganic particles in a liquid containing a fiber to give a complex fiber; and granulating the complex fiber into granules having a particle size of 0.1 to 10 mm.

Assignees

• Jujo Paper Co Ltd

Inventors

• Oishi Masatoshi
• Shigemi Atsushi
• Nakatani Toru
• Ninagawa Koji
• Shinkura Hiroshi

Classifications

• D06M11/55

  with sulfur trioxide; with sulfuric acid or thiosulfuric acid or their salts · CPC title

• C08J3/12

  Powdering or granulating · CPC title

• D06M2101/32

  Polyesters · CPC title

• D21H17/70 Primary

  forming new compounds in situ, e.g. within the pulp or paper, by chemical reaction with other substances added separately · CPC title

• D06M11/44

  Oxides or hydroxides of elements of Groups 2 or 12 of the Periodic Table; Zincates; Cadmates · CPC title