公开(公告)号：US11377791B2

公开(公告)日：2022-07-05

申请号：US16117685

申请日：2018-08-30

Applicant: FiberLean Technologies Limited

Inventor： John Claude Husband ,  Per Svending ,  David Robert Skuse ,  Tafadzwa Motsi ,  Mikko Likitalo ,  Alan Coles

IPC: D21H11/18 ,  D21C9/00 ,  D21H15/02 ,  D21D1/20 ,  D21H19/38 ,  D21B1/30 ,  D21H11/04 ,  D21H11/20

Abstract: A method for preparing an aqueous suspension may include providing a fibrous substrate comprising cellulose having a Canadian Standard freeness equal to or less than 450 cm3, and microfibrillating the fibrous substrate in an aqueous environment by grinding in the presence of a grinding medium consisting essentially of mullite. The grinding may be carried out in the absence of grindable inorganic particulate material. The grinding medium may be present in an amount of at least about 10% by volume of the aqueous environment. The microfibrillated cellulose may have a fibre steepness of from about 20 to about 50.

公开(公告)号：US11136721B2

公开(公告)日：2021-10-05

申请号：US16273281

申请日：2019-02-12

Applicant: FiberLean Technologies Limited

Inventor： John Claude Husband ,  Per Svending ,  David Robert Skuse

IPC: D21H19/34 ,  D21H17/25 ,  D21H19/38 ,  D21H19/52 ,  D21H17/63 ,  D21H19/22 ,  D21H23/48 ,  D21H27/10 ,  D21H11/04

Abstract: The present invention relates to compositions, such as filled and coated papers, comprising microfibrillated cellulose and inorganic particulate material.

公开(公告)号：US11970817B2

公开(公告)日：2024-04-30

申请号：US17826700

申请日：2022-05-27

Applicant: FiberLean Technologies Limited

Inventor： John Claude Husband ,  Per Svending ,  David Robert Skuse ,  Tafadzwa Motsi ,  Mikko Likitalo ,  Alan Coles

IPC: D21C9/00 ,  D21B1/30 ,  D21B1/32 ,  D21D1/20 ,  D21H11/04 ,  D21H11/18 ,  D21H11/20 ,  D21H15/02 ,  D21H19/38

CPC classification number: D21C9/007 ,  D21B1/30 ,  D21B1/32 ,  D21C9/001 ,  D21D1/20 ,  D21H5/1236 ,  D21H11/04 ,  D21H11/18 ,  D21H11/20 ,  D21H19/38 ,  D21H19/385

Abstract: A method for preparing an aqueous suspension may include providing a fibrous substrate comprising cellulose having a Canadian Standard freeness equal to or less than 450 cm3, and microfibrillating the fibrous substrate in an aqueous environment by grinding in the presence of a grinding medium consisting essentially of mullite. The grinding may be carried out in the absence of grindable inorganic particulate material. The grinding medium may be present in an amount of at least about 10% by volume of the aqueous environment. The microfibrillated cellulose may have a fibre steepness of from about 20 to about 50.

公开(公告)号：US20190177919A1

公开(公告)日：2019-06-13

申请号：US16273281

申请日：2019-02-12

Applicant: FiberLean Technologies Limited

Inventor： John Claude HUSBAND ,  Per Svending ,  David Robert Skuse

IPC: D21H19/34 ,  D21H19/38 ,  D21H17/25 ,  D21H17/63 ,  D21H19/52 ,  D21H27/10 ,  D21H23/48 ,  D21H19/22

Abstract: The present invention relates to compositions, such as filled and coated papers, comprising microfibrillated cellulose and inorganic particulate material.

公开(公告)号：US20190078257A1

公开(公告)日：2019-03-14

申请号：US16117582

申请日：2018-08-30

Applicant: FiberLean Technologies Limited

Inventor： John Claude Husband ,  Per Svending ,  David Robert Skuse ,  Tafadzwa Motsi

IPC: D21B1/30 ,  D21H11/20 ,  D21H11/04 ,  D21H19/38 ,  D21H15/02 ,  D21D1/20 ,  D21C9/00 ,  D21H11/18

Abstract: Methods of preparing partially dried or essentially completely dried compositions comprising microfibrillated cellulose and an inorganic particulate material may include microfibrillating a fibrous substrate comprising cellulose in an aqueous environment by grinding in the presence of an inorganic particulate material to form an aqueous composition comprising microfibrillated cellulose and inorganic particulate material, wherein the fibrous substrate comprising cellulose has a Canadian Standard freeness equal to or less than 450 cm, wherein the fibrous substrate to the inorganic particulate material are in a ratio of about 99.5:0.5 to about 0.5:99.5, and wherein the microfibrillated cellulose has a fibre steepness of from about 20 to about 50; by treating the aqueous composition comprising microfibrillated cellulose and inorganic particulate material to remove at least a portion or substantially all of the water of the aqueous composition to form a partially dried or essentially completely dried composition comprising microfibrillated cellulose and inorganic particulate material.

公开(公告)号：US10214859B2

公开(公告)日：2019-02-26

申请号：US15475487

申请日：2017-03-31

Applicant: FiberLean Technologies Limited

Inventor： Per Svending ,  Jonathan Stuart Phipps ,  Johannes Kritzinger ,  Tom Larson ,  Tania Selina ,  David Skuse

IPC: D21H11/18 ,  D21H17/28 ,  D21H17/67 ,  D21H17/68 ,  D21H19/52 ,  D21H21/10 ,  D21H27/32 ,  D21H19/36 ,  D21H19/38 ,  D21H19/40 ,  D21H11/04 ,  D21H11/14

Abstract: The present invention is directed to products, such as paper and paperboard products, comprising a substrate containing cellulose and top ply comprising microfibrillated cellulose and inorganic particulate, to methods of making such paper and paperboard products, and associated uses of such paper and paperboard products. The microfibrillated cellulose and inorganic particulate material are applied at the stage when the wet substrate is in the process of being formed on the wire of a papermaking machine, thereby avoiding the additional cost of more extensive equipment and machinery as well as in separate drying of a coating. The microfibrillated cellulose facilitates the application of inorganic particulate onto the surface of a wet paper or paperboard substrate when applied thusly, by trapping the inorganic particulate on the surface of the substrate and by giving the composite sufficient strength and a suitable pore structure to make it suitable for printing and other end-use demands.

公开(公告)号：US20180371694A1

公开(公告)日：2018-12-27

申请号：US16117685

申请日：2018-08-30

Applicant: FiberLean Technologies Limited

Inventor： John Claude Husband ,  Per Svending ,  David Robert Skuse ,  Tafadzwa Motsi ,  Mikko Likitalo ,  Alan Coles

IPC: D21H11/20 ,  D21H11/04 ,  D21H19/38 ,  D21H15/02 ,  D21D1/20 ,  D21C9/00 ,  D21B1/30 ,  D21H11/18

Abstract: A method for preparing an aqueous suspension may include providing a fibrous substrate comprising cellulose having a Canadian Standard freeness equal to or less than 450 cm3, and microfibrillating the fibrous substrate in an aqueous environment by grinding in the presence of a grinding medium consisting essentially of mullite. The grinding may be carried out in the absence of grindable inorganic particulate material. The grinding medium may be present in an amount of at least about 10% by volume of the aqueous environment. The microfibrillated cellulose may have a fibre steepness of from about 20 to about 50.

公开(公告)号：US10100464B2

公开(公告)日：2018-10-16

申请号：US14843516

申请日：2015-09-02

Applicant: FiberLean Technologies Limited

Inventor： John Claude Husband ,  Per Svending ,  David Robert Skuse ,  Tafadzwa Motsi ,  Mikko Likitalo ,  Alan Coles

IPC: D21B1/30 ,  D21H15/02 ,  D21C9/00 ,  D21D1/20 ,  D21H11/18 ,  D21H19/38 ,  D21H11/04 ,  D21H11/20

Abstract: A method for preparing an aqueous suspension may include providing a fibrous substrate comprising cellulose having a Canadian Standard freeness equal to or less than 700 cm3, and microfibrillating the fibrous substrate in an aqueous environment by grinding in the presence of a grinding medium which is to be removed after completion of grinding. The grinding may be carried out in the absence of grindable inorganic particulate material, wherein the grinding medium is present in an amount of at least about 10% by volume of the aqueous environment, and wherein the microfibrillated cellulose has a fiber steepness of from about 20 to about 50.

公开(公告)号：US11732421B2

公开(公告)日：2023-08-22

申请号：US17590105

申请日：2022-02-01

Applicant: FIBERLEAN TECHNOLOGIES LIMITED

Inventor： Per Svending ,  Jonathan Stuart Phipps ,  Johannes Kritzinger ,  Tom Reeve-Larson ,  Tania Selina ,  David Skuse

IPC: D21H27/32 ,  D21H19/52 ,  D21H11/04 ,  D21H11/14 ,  D21H11/18 ,  D21H17/28 ,  D21H17/67 ,  D21H21/10 ,  D21H17/68

CPC classification number: D21H27/32 ,  D21H11/04 ,  D21H11/14 ,  D21H11/18 ,  D21H17/28 ,  D21H17/67 ,  D21H17/675 ,  D21H17/68 ,  D21H19/52 ,  D21H21/10

Abstract: The present invention is directed to products, such as paper and paperboard products, comprising a substrate containing cellulose and top ply comprising microfibrillated cellulose and inorganic particulate, to methods of making such paper and paperboard products, and associated uses of such paper and paperboard products. The microfibrillated cellulose and inorganic particulate material are applied at the stage when the wet substrate is in the process of being formed on the wire of a papermaking machine, thereby avoiding the additional cost of more extensive equipment and machinery as well as in separate drying of a coating. The microfibrillated cellulose facilitates the application of inorganic particulate onto the surface of a wet paper or paperboard substrate when applied thusly, by trapping the inorganic particulate on the surface of the substrate and by giving the composite sufficient strength and a suitable pore structure to make it suitable for printing and other end-use demands.

公开(公告)号：US11732411B2

公开(公告)日：2023-08-22

申请号：US17492036

申请日：2021-10-01

Applicant: FiberLean Technologies Limited

Inventor： John Claude Husband ,  Per Svending ,  David Robert Skuse ,  Tafadzwa Motsi

IPC: D21C9/00 ,  D21H11/18 ,  D21H11/20 ,  D21H15/02 ,  D21D1/20 ,  D21H19/38 ,  D21B1/32 ,  D21B1/30 ,  D21H11/04

CPC classification number: D21C9/007 ,  D21B1/30 ,  D21B1/32 ,  D21C9/001 ,  D21D1/20 ,  D21H5/1236 ,  D21H11/04 ,  D21H11/18 ,  D21H11/20 ,  D21H19/38 ,  D21H19/385

Abstract: Methods of preparing partially dried or essentially completely dried compositions comprising microfibrillated cellulose and an inorganic particulate material may include microfibrillating a fibrous substrate comprising cellulose in an aqueous environment by grinding in the presence of an inorganic particulate material to form an aqueous composition comprising microfibrillated cellulose and inorganic particulate material, wherein the fibrous substrate comprising cellulose has a Canadian Standard freeness equal to or less than 450 cm, wherein the fibrous substrate to the inorganic particulate material are in a ratio of about 99.5:0.5 to about 0.5:99.5, and wherein the microfibrillated cellulose has a fibre steepness of from about 20 to about 50; by treating the aqueous composition comprising microfibrillated cellulose and inorganic particulate material to remove at least a portion or substantially all of the water of the aqueous composition to form a partially dried or essentially completely dried composition comprising microfibrillated cellulose and inorganic particulate material.