IP Library › Granted Patent US 8,974,634
Granted Patent B2
US 8,974,634 · App. 13/512,965 · Granted Mar 10, 2015

Cellulose nanofibers

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Quick Facts
Patent No.
US 8,974,634
App. No.
13/512,965
Granted
Mar 10, 2015
Kind
B2
Abstract

The present invention provides a novel production method of a cellulose nanofiber and a novel cellulose nanofiber. The method for producing a cellulose nanofiber comprises defibrating pulp by a single- or multi-screw kneader in the presence of water, the single or multi-screw kneader having a screw circumferential speed of 45 m/min. Or more.

Claims (3)

1. A method for producing a cellulose nanofiber comprising defibrating pulp by a single- or multi-screw kneader in the presence of water, the single or multi-screw kneader having a screw circumferential speed of 45 meters per minute or more, and the L/D of the kneader is 15 or more, wherein L is the kneader length and D is the screw diameter.

2. The method according to claim 1 , wherein the single- or multi-screw kneader is a twin-screw kneader.

3. The method according to claim 1 , wherein the L/D of the kneader is 15 to 60.

Assignments (5)
CHANGE OF NAME Recorded Sep 5, 2017
From: MITSUBISHI RAYON CO., LTD.
To: MITSUBISHI CHEMICAL CORPORATION
Reel/Frame 043750/0834 →
MERGER Recorded Sep 4, 2017
From: MITSUBISHI CHEMICAL CORPORATION
To: MITSUBISHI RAYON CO., LTD.
Reel/Frame 043750/0207 →
CORRECTIVE ASSIGNMENT TO CORRECT THE ORDER OF ASSIGNEES PREVIOUSLY RECORDED ON REEL 033778 FRAME 0244. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNEES OF THE ENTIRE UNDIVIDED RIGHT, TITLE AND INTEREST. Recorded Nov 10, 2014
From: NIPPON PAPER INDUSTRIES CO., LTD.; KYOTO UNIVERSITY
To: NIPPON PAPER INDUSTRIES CO., LTD.; OJI HOLDINGS CORPORATION; MITSUBISHI CHEMICAL CORPORATION; KYOTO UNIVERSITY
Reel/Frame 034195/0305 →
PARTIAL ASSIGNMENT Recorded Sep 19, 2014
From: KYOTO UNIVERSITY; NIPPON PAPER INDUSTRIES CO., LTD.
To: KYOTO UNIVERSITY; NIPPON PAPER INDUSTRIES CO., LTD.; OJI HOLDINGS CORPORATION; MITSUBISHI CHEMICAL CORPORATION
Reel/Frame 033778/0244 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 19, 2012
From: YANO, HIROYUKI; HASHIMOTO, TADAFUMI; SATO, AKIHIRO
To: KYOTO UNIVERSITY; NIPPON PAPER INDUSTRIES CO., LTD.
Reel/Frame 028584/0753 →