A METHOD FOR MANUFACTURING A PURIFIED FIBER FRACTION FROM USED BEVERAGE CARTON

    公开(公告)号:SE546824C2

    公开(公告)日:2025-02-25

    申请号:SE2151331

    申请日:2021-10-29

    Applicant: STORA ENSO OYJ

    Abstract: The present invention relates to a method for manufacturing a purified fiber fraction from used beverage carton (UBC), said method comprising the steps:a) subjecting a UBC starting material to a polymer and aluminum film separation method to obtain a UBC polymer and aluminum fraction and a raw UBC fiber fraction;b) optionally subjecting the raw UBC fiber fraction to a coarse screening method to remove coarse particles;c) subjecting the raw UBC fiber fraction to a fine screening method to remove cellulose fines and fine particulate contaminants, wherein the fine screening method comprises at least one fine screening step and at least one dilution step; d) optionally subjecting the fine screened UBC fiber fraction to a bleaching method;e) subjecting the fine screened, and optionally bleached, UBC fiber fraction to an electro-osmosis method to remove further contaminants;f) optionally subjecting the fine screened, and optionally bleached, UBC fiber fraction to a dewatering method to a consistency of at least 20 wt%; and g) subjecting the optionally dewatered UBC fiber fraction to a deactivation method to obtain a purified UBC fiber fraction.

    SURFACE-TREATED GAS BARRIER FILM
    30.
    发明专利

    公开(公告)号:SE546304C2

    公开(公告)日:2024-10-01

    申请号:SE2250127

    申请日:2022-02-10

    Applicant: STORA ENSO OYJ

    Abstract: The present invention relates to a method for preparing a surface-treated gas barrier film, said method comprising the steps of: a) providing a gas barrier substrate comprising at least 50 wt% of a highly refined cellulose pulp based on dry weight; and b) surface treatment of the gas barrier substrate, wherein the surface treatment comprises treating a surface of the gas barrier substrate with a solution comprising an organic acid and sodium carbonate and drying the gas barrier substrate to obtain a surface-treated gas barrier film. The invention further relates to a surface-treated gas barrier film obtained according to the method and a packaging laminate comprising the surface-treated gas barrier film.

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