公开(公告)号：US20250034813A1

公开(公告)日：2025-01-30

申请号：US18716972

申请日：2022-12-01

Applicant: Kemira Oyj

Inventor： Markus KVIST ,  Sami PUTTONEN ,  Kimmo STRENGELL ,  Leif ROBERTSÉN ,  Matti HIETANIEMI

IPC: D21H21/16 ,  D21H17/17 ,  D21H17/42 ,  D21H17/55 ,  D21H21/28 ,  D21H23/08 ,  D21J3/00 ,  D21J5/00

Abstract: There is provided a method for improving grease and oil resistance of a moulded fiber based article comprising introducing to a fiber stock a composition comprising a synthetic polymer component and a cationic polymer component and thermoforming the fiber stock. There is also provided a moulded fiber based article and a use of the composition improving grease and oil resistance of a moulded fiber based article. There is also provided a method for preparation of a moulded fiber based article.

公开(公告)号：US20250043513A1

公开(公告)日：2025-02-06

申请号：US18716969

申请日：2022-12-01

Applicant: Kemira Oyj

Inventor： Markus KVIST ,  Sami PUTTONEN ,  Leif ROBERTSÉN ,  Matti HIETANIEMI

IPC: D21H21/16 ,  D21H17/45 ,  D21H17/55 ,  D21H17/56 ,  D21H23/04 ,  D21J5/00

Abstract: There is provided a method for improving grease and oil resistance of a moulded fiber based article comprising introducing to a fiber stock a composition comprising at least one anionic polymer and cationic polymer and moulding the fiber stock. There is also provided a moulded fiber based article and a use of the composition for improving grease and oil resistance of a moulded fiber based article. There is also provided a method for preparation of a moulded fiber based article.

公开(公告)号：US20240093433A1

公开(公告)日：2024-03-21

申请号：US18039654

申请日：2021-12-01

Applicant: KEMIRA OYJ

Inventor： Matti HIETANIEMI ,  Asko KARPPI ,  Markus KORHONEN ,  Markus KVIST

IPC: D21H21/18 ,  D21H11/14 ,  D21H17/00 ,  D21H17/26 ,  D21H17/29 ,  D21H17/43 ,  D21H17/45 ,  D21H23/04 ,  D21H27/00

CPC classification number: D21H21/18 ,  D21H11/14 ,  D21H17/26 ,  D21H17/29 ,  D21H17/43 ,  D21H17/455 ,  D21H17/72 ,  D21H23/04 ,  D21H27/00

Abstract: The invention relates to a chemical treatment system for manufacture of paper, board or the like and to a method employing it. The system comprises a first component, which is a glyoxylated polyacrylamide having a net cationic charge density and obtained by glyoxylation of a cationic polyacrylamide base polymer having a weight average molecular weight MW in a range of 30 000-500 000 g/mol. The system further comprises a second component, which comprises a mixture of at least a high-amylopectin starch, and an anionic first polymer, which has a weight average molecular weight MW>200 000 g/mol. The second component has a net cationic charge density in a range from 0.05 meq/g to 0.9 meq/g, when measured at pH 2.8, and a net anionic charge density in a range from −2 meq/g to −0.1 meq/g, when measured at pH 7.