METHOD AND APPARATUS FOR DRYING A MOVING WEB OF MATERIAL AT A PAPER OR BOARD MACHINE

    公开(公告)号:CA2614011C

    公开(公告)日:2015-02-17

    申请号:CA2614011

    申请日:2006-07-20

    Applicant: STORA ENSO OYJ

    Abstract: The invention relates to a method and an apparatus for drying a moving web of material at a paper or board machine. The drying is performed by a drying cylinder transverse to the direction of travel of the web, past which the web is being led. The drying cylinder is heated by resistance wires, each wire disposed in a plane at an angle to the longitudinal axis of the cylinder and extending annularly around the cylinder at equal intervals in the longitudinal direction and over the length of the drying cylinder. With the adjustability of the drying cylinder it is possible to eliminate moisture lines in the longitudinal direction of the web, which are generated when forming the web on the wire. The drying can be done by independently adjustable resistance wires, by heating vapour supplied independently to different zones of the cylinder, or both.

    87.
    发明专利
    未知

    公开(公告)号:FI122195B

    公开(公告)日:2011-10-14

    申请号:FI20041022

    申请日:2004-07-26

    Applicant: STORA ENSO OYJ

    Abstract: The invention relates to a method for forming a mouth roll (2) to a cup (1) made of plastic-coated board and to the cup provided with a mouth roll produced by the method. The mouth roll for stiffening the cup is produced with a suitable striking tool bending the board at the mouth of the cup. In accordance with the invention, the mouth roll is additionally stabilized by melting the plastic coating (8) of the board under heat so that the opposite surfaces of the board adhere to each other by heat-sealing in the area of the roll. Melting can be performed e.g. by hot-air blasting directed to the mouth roll at is production stage.

    89.
    发明专利
    未知

    公开(公告)号:FI20095291A0

    公开(公告)日:2009-03-20

    申请号:FI20095291

    申请日:2009-03-20

    Applicant: STORA ENSO OYJ

    Abstract: The invention relates to a method of treating chemical pulp fibers by a polymerizing hydroxy acid, the fibers thus obtained and the products refined from them. In the method, the hydroxy acid reacts with the reactive groups of the fibers in the presence of a catalyst, forming ester bonds. The following units of the same hydroxy acid are oligomerized and/or polymerized to these grafted acid residues. The fibers thus treated and the products refined thereof endure better processing stages that include drawing and stretching than untreated fibers.

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