公开(公告)号：US20240410111A1

公开(公告)日：2024-12-12

申请号：US18688987

申请日：2022-11-24

Applicant: Valmet Technologies Oy

Inventor： Tuomo Aho ,  Juha Pousi

IPC: D21D5/02 ,  D21D1/00

Abstract: Textile fibers of different lengths are fractionated in a liquid medium at a predetermined consistency into at least two fractions on the grounds of the fiber length, the two fractions being a first accept and a second accept. The second accept, which has longer fibers than the first accept, is led to a refining step in the liquid medium, and the refined fibers are fractionated in the liquid medium into at least two fractions on the grounds of the fiber length.

公开(公告)号：US20230193558A1

公开(公告)日：2023-06-22

申请号：US18084720

申请日：2022-12-20

Applicant: Valmet Technologies Oy

Inventor： Juha-Pekka Huhtanen ,  Tuomo Aho

IPC: D21F1/00 ,  D21H11/18 ,  D21F9/00 ,  D21F3/08 ,  D21F3/04 ,  D21G9/00 ,  D21F1/80

CPC classification number: D21F1/0009 ,  D21H11/18 ,  D21F9/003 ,  D21F3/08 ,  D21F3/04 ,  D21G9/0027 ,  D21F1/80

Abstract: The invention relates to a system of producing MFC (micro fibrillated cellulose) having a process device (30) of a pulper, a refiner or a screen configured to process MFC suspension to consistency of 0.5-5%. The system has a continuous pressing means (15; 25, 26) configured to dry the MFC suspension to a consistency of 6-60%. A method of producing MFC has at least one process stage (30) which processes a MFC suspension to a consistency of 0.5-5% by a process device (30). In the process stage the MFC suspension is pulped in a pulping stage in a pulper and/or refined in a refining stage by a refiner and/or screened in a screening stage by a screen. The MFC suspension having the consistency of 0.5-5% is dried in a drying stage of continuous pressing (15, 25, 26) by continuous a pressing device (15, 25, 26) to a consistency of 6-60%.

公开(公告)号：US12006628B2

公开(公告)日：2024-06-11

申请号：US18084720

申请日：2022-12-20

Applicant: Valmet Technologies Oy

Inventor： Juha-Pekka Huhtanen ,  Tuomo Aho

IPC: D21F1/00 ,  D21F1/80 ,  D21F3/04 ,  D21F3/08 ,  D21F9/00 ,  D21G9/00 ,  D21H11/18

CPC classification number: D21F1/0009 ,  D21F1/80 ,  D21F3/04 ,  D21F3/08 ,  D21F9/003 ,  D21G9/0027 ,  D21H11/18

Abstract: The invention relates to a system of producing MFC (micro fibrillated cellulose) having a process device (30) of a pulper, a refiner or a screen configured to process MFC suspension to consistency of 0.5-5%. The system has a continuous pressing means (15; 25, 26) configured to dry the MFC suspension to a consistency of 6-60%. A method of producing MFC has at least one process stage (30) which processes a MFC suspension to a consistency of 0.5-5% by a process device (30). In the process stage the MFC suspension is pulped in a pulping stage in a pulper and/or refined in a refining stage by a refiner and/or screened in a screening stage by a screen. The MFC suspension having the consistency of 0.5-5% is dried in a drying stage of continuous pressing (15, 25, 26) by continuous a pressing device (15, 25, 26) to a consistency of 6-60%.