公开(公告)号：US20250075060A1

公开(公告)日：2025-03-06

申请号：US18293229

申请日：2022-06-22

Applicant: Daio Paper Corporation

Inventor： Takaaki Imai ,  Ikko Matsusue ,  Naoto Umeguchi

IPC: C08L1/02 ,  C08J3/20 ,  C08J3/205 ,  C08K7/02 ,  C08L23/12 ,  D21C9/00

Abstract: A microfiber cellulose solid body of which productivity in kneading treatment has been improved, as well as a method for preparing the microfiber cellulose solid body is provided. The microfiber cellulose solid body is formed by compressing a mixture containing resin powder and microfiber cellulose having an average fiber width of 0.1 to 19 μm, wherein the microfiber cellulose solid body has a volume of 6 to 4000 mm3 and a bulk density of 0.3 to 1.0 g/cm3.

公开(公告)号：US11220787B2

公开(公告)日：2022-01-11

申请号：US16632799

申请日：2018-05-30

Applicant: Daio Paper Corporation

Inventor： Ikko Matsusue

IPC: D21H11/20 ,  D21C9/00

Abstract: A fine cellulose fiber-containing substance that has excellent dispersibility in water and can be manufactured easily. A method is for manufacturing the fine cellulose fiber-containing substance, and a method is for manufacturing a fine cellulose fiber dispersion. A fine cellulose fiber-containing substance contains fine cellulose fibers into which a phosphite containing a cation of an inorganic substance is introduced. The ratio of the cation of the inorganic substance with respect to 1 g of the fine cellulose fibers is 0.14 mmol or more. In manufacturing the fine cellulose fiber-containing substance, a phosphite is introduced into cellulose fibers, and then the cellulose fibers are defibrated to obtain a dispersion containing fine cellulose fibers, during which an alkali metal ion-containing substance is added to the cellulose fibers, and the dispersion is concentrated. In manufacturing a fine cellulose fiber dispersion, the fine cellulose fiber-containing substance is mixed with water.

公开(公告)号：US20210380724A1

公开(公告)日：2021-12-09

申请号：US17049825

申请日：2019-05-17

Applicant: Daio Paper Corporation

Inventor： Ikko Matsusue

IPC: C08B5/00 ,  D01F2/24

Abstract: A fine cellulose fiber in which when the fine cellulose fiber is formed into a dispersion, the dispersion has very high light transmittance and viscosity, and a method for producing the fine cellulose fiber.
The fine cellulose fiber has a fiber width of 1 to 200 nm. A part of hydroxy groups of the cellulose fiber are substituted with a predetermine functional group to introduce an ester of phosphorus-oxo acid, and the introduction amount of the functional group is more than 2.0 mmol per 1 g of the cellulose fiber. For producing the fine cellulose fiber, to cellulose fiber is added a solution having a pH of less than 3.0 and including an additive (A) containing at least one of a phosphorus-oxo acid and a phosphorus-oxo acid metal salt and an additive (B) containing at least one of urea and a urea derivative, and the mixture is heated to perform fibrillation.

公开(公告)号：US20200063292A1

公开(公告)日：2020-02-27

申请号：US16609984

申请日：2018-05-08

Applicant: Daio Paper Corporation

Inventor： Ikko Matsusue

IPC: D01F2/00 ,  D21H11/18 ,  C08B15/06 ,  C08B7/00 ,  D01F1/10

Abstract: Fine cellulose fiber has a dispersion with a very high transparency and viscosity. A method is for producing the fine cellulose fiber. In the cellulose fiber, a part of hydroxy groups of cellulose fiber is substituted with a predetermined functional group to introduce an ester of phosphorus-oxo acid, and substituted with a carbamate group to introduce a carbamate. The method for producing fine cellulose fiber includes adding an additive (A) and an additive (B) including at least one of urea and a urea derivative to cellulose fiber, heating the mixture at 100 to 210° C., washing the mixture, and then fibrillating the mixture, the additive (B) being added in an amount of 0.01 to 100 mol based on 1 mol of the additive (A).

公开(公告)号：US12012469B2

公开(公告)日：2024-06-18

申请号：US17053867

申请日：2019-05-24

Applicant: Daio Paper Corporation

Inventor： Ikko Matsusue

IPC: C08B3/20 ,  C08B3/12 ,  C08J5/04 ,  D21H11/18 ,  D21H11/20

CPC classification number: C08B3/20 ,  C08B3/12 ,  C08J5/045 ,  D21H11/18 ,  D21H11/20

Abstract: A fibrous cellulose having a high resin reinforcing effect and a method for manufacturing the same, and a fibrous cellulose composite resin having high strength and a method for manufacturing the same. A fibrous cellulose has an average fiber width of 0.1 μm or more, an average fiber length of 0.02 to 3.0 mm, and a fibrillation ratio of 1.0% or more. A kneaded product of this fibrous cellulose and a resin is formed into a fibrous cellulose composite resin. In manufacturing the fibrous cellulose, a raw material fiber is defibrated so as to have an average fiber width of 0.1 μm or more, an average fiber length of 0.02 to 3.0 mm, and a fibrillation ratio of 1.0% or more. The fibrous cellulose obtained by this method and a resin are kneaded to manufacture a fibrous cellulose composite resin.

公开(公告)号：US11655310B2

公开(公告)日：2023-05-23

申请号：US16622475

申请日：2018-06-13

Applicant: Kyoto University ,  DAIO PAPER CORPORATION

Inventor： Yoshinobu Tsujii ,  Keita Sakakibara ,  Koji Tanaka ,  Takahito Ikuma ,  Junya Okawa ,  Ikko Matsusue

IPC: C08B15/06 ,  C08L1/10 ,  D06M13/432 ,  D06M101/06

CPC classification number: C08B15/06 ,  C08L1/10 ,  D06M13/432 ,  D06M2101/06

Abstract: Provided are: a fine cellulose fiber that is superior in handling properties and that can suitably be used as a reinforcing material or the like for resin; a production method of the fine cellulose fiber; and a slurry and a composite comprising the fine cellulose fibers. The present invention pertains to fine cellulose fibers comprising a carbamate group. The degree of substitution with the carbamate group with respect to hydroxy groups in the fine cellulose fibers is preferably no less than 0.05 and no greater than 0.5. The present invention pertains to a slurry comprising the fine cellulose fibers, to a composite comprising the fine cellulose fibers and a resin, and to a production method of the fine cellulose fibers, comprising performing a heat treatment on a mixture of a plant raw material and urea or the like, and performing a miniaturization treatment of the plant raw material.

公开(公告)号：US11441243B2

公开(公告)日：2022-09-13

申请号：US16609984

申请日：2018-05-08

Applicant: Daio Paper Corporation

Inventor： Ikko Matsusue

IPC: C08B15/06 ,  D01F2/00 ,  C08B7/00 ,  D01F1/10 ,  D21H11/18

Abstract: Fine cellulose fiber has a dispersion with a very high transparency and viscosity. A method is for producing the fine cellulose fiber. In the cellulose fiber, a part of hydroxy groups of cellulose fiber is substituted with a predetermined functional group to introduce an ester of phosphorus-oxo acid, and substituted with a carbamate group to introduce a carbamate. The method for producing fine cellulose fiber includes adding an additive (A) and an additive (B) including at least one of urea and a urea derivative to cellulose fiber, heating the mixture at 100 to 210° C., washing the mixture, and then fibrillating the mixture, the additive (B) being added in an amount of 0.01 to 100 mol based on 1 mol of the additive (A).

公开(公告)号：US10975518B2

公开(公告)日：2021-04-13

申请号：US16485713

申请日：2018-02-23

Applicant: Daio Paper Corporation

Inventor： Ikko Matsusue

IPC: D06M11/70 ,  D06M13/432 ,  D21H11/20 ,  D06M101/06

Abstract: A method is for manufacturing cellulose microfibers in which a problem of yellowing of cellulose microfibers to be obtained was solved, and cellulose microfibers.
As to a method for manufacturing cellulose microfibers, cellulose fibers are added with an additive (A) consisting of at least one of a phosphorous acid and a metal phosphite and an additive (B) consisting of at least one of urea and a urea derivative, heated and washed, then fibrillated. Also, as to cellulose microfibers, the fiber width is 1 to 1000 nm, and a part of hydroxy groups of cellulose fibers is substituted with a functional group represented by a predetermined structural formula to introduce an ester of phosphorous acid.

公开(公告)号：US20220282076A1

公开(公告)日：2022-09-08

申请号：US17633315

申请日：2020-08-24

Applicant: Daio Paper Corporation

Inventor： Ikko Matsusue ,  Takaaki Imai ,  Yu Ochiai

IPC: C08L23/12 ,  C08J3/00 ,  D21C1/08

Abstract: A fibrous cellulose composite resin excellent in strength, and a method for producing the same. The fibrous cellulose composite resin includes microfiber cellulose, a resin, and an acid-modified resin, wherein the microfiber cellulose has hydroxyl groups, which are substituted with carbamate groups, and has been washed and defibrated into an average fiber width of 0.1 μm or larger, in which the amount of the byproduct is 10% or less per 100 parts by mass of a carbamate-modified cellulose. The production method includes heat-treating a cellulose raw material and urea to obtain a carbamate-modified cellulose, washing the carbamate-modified cellulose, defibrating the carbamate-modified cellulose to obtain a dispersion of carbamate-modified microfiber cellulose having an average fiber width of 0.1 μm or larger, mixing the dispersion and an acid-modified resin to obtain a material containing carbamate-modified microfiber cellulose, and kneading the material with a resin to obtain a composite resin.

公开(公告)号：US20220135781A1

公开(公告)日：2022-05-05

申请号：US17434108

申请日：2020-03-12

Applicant: Daio Paper Corporation

Inventor： Ikko Matsusue ,  Yu Ochiai

IPC: C08L23/12 ,  C08J3/00 ,  C08J5/06

Abstract: A fibrous cellulose composite resin being excellent in strength, a method for producing the same, and a reinforcing material for resins capable of significantly improving resin strength are provided. The fibrous cellulose composite resin includes fibrous cellulose containing microfiber cellulose, a resin, and an acid-modified resin, wherein the microfiber cellulose has an average fiber width of 0.1 μm or larger, an average fiber length of 0.02 to 2.0 mm, and a percentage of fibrillation of 1.0% or higher, and hydroxyl groups substituted with carbamate groups, and the carbamate groups are ionically bonded to acidic groups of the acid-modified resin.