公开(公告)号：US20220363871A1

公开(公告)日：2022-11-17

申请号：US17597317

申请日：2020-06-30

Applicant: Stora Enso OYJ

Inventor： Ulla Jansson ,  Anders Moberg ,  Kaj Backfolk

IPC: C08L1/02 ,  D21C9/00 ,  D21H21/52 ,  D21H11/02 ,  D21H27/30 ,  D21H11/18 ,  D21H21/18

Abstract: The present invention relates to a refined cellulose fiber composition useful as a strength enhancing agent for paper and paperboard, wherein the refined cellulose fiber composition has a Schopper-Riegler (SR) number in the range of 80-98 as determined by standard ISO 5267-1, and wherein the refined cellulose fiber composition has a content of fibers having a length >0.2 mm of at least 12 million fibers per gram based on dry weight. The invention further relates to a method for preparing the refined cellulose fiber composition and to pulp paper and paperboard comprising the refined cellulose fiber composition.

公开(公告)号：US12084563B2

公开(公告)日：2024-09-10

申请号：US17597317

申请日：2020-06-30

Applicant: Stora Enso OYJ

Inventor： Ulla Jansson ,  Anders Moberg ,  Kaj Backfolk

IPC: C08L1/02 ,  D21C9/00 ,  D21H11/02 ,  D21H11/18 ,  D21H21/18 ,  D21H21/52 ,  D21H27/30

CPC classification number: C08L1/02 ,  D21C9/007 ,  D21H11/02 ,  D21H11/18 ,  D21H21/18 ,  D21H21/52 ,  D21H27/30

Abstract: The present invention relates to a refined cellulose fiber composition useful as a strength enhancing agent for paper and paperboard, wherein the refined cellulose fiber composition has a Schopper-Riegler (SR) number in the range of 80-98 as determined by standard ISO 5267-1, and wherein the refined cellulose fiber composition has a content of fibers having a length >0.2 mm of at least 12 million fibers per gram based on dry weight. The invention further relates to a method for preparing the refined cellulose fiber composition and to pulp paper and paperboard comprising the refined cellulose fiber composition.

公开(公告)号：US20220178082A1

公开(公告)日：2022-06-09

申请号：US17429987

申请日：2020-02-12

Applicant: Stora Enso OYJ

Inventor： Sohrab Kazemahvazi ,  Ulla Jansson ,  Irene Wedin ,  Frank Peng

IPC: D21J3/00 ,  D21H11/08 ,  D21H11/12 ,  D21H11/20 ,  D21J1/16 ,  B65D65/38

Abstract: The invention discloses a method for producing a three dimensional molded product from cellulose fibers, comprising the steps of: providing a cellulose fiber composition comprising 1-30 wt % lignin, said cellulose fiber composition further having a solid content between 0.1-95%; providing a forming tool having a three dimensional shape including a forming surface, and bringing said forming surface into contact with the cellulose fiber composition; and press drying the cellulose fiber composition contacted by the forming tool at temperatures>200° C. to a dry content of at least 70%. The invention also relates to a three dimensional fiber based product obtainable by means of said method.