METHODS FOR MAKING PAPER OR BOARD, A BOARD TRAY AND PULP PARTICLES COATED WITH FOAMABLE POLYMER FOR USE IN THE SAME

    公开(公告)号:CA3009875A1

    公开(公告)日:2017-08-17

    申请号:CA3009875

    申请日:2017-02-06

    Applicant: STORA ENSO OYJ

    Abstract: The invention concerns a method of manufacturing paper or board, the paper or board obtained by the method, and a method of producing a tray from the board. In a fibrous stock for papermaking is incorporated an amount of polymer coated fibrous particles, which even have a foaming agent such as moisture contained therein. A web is formed from the fibrous stock on a forming fabric of a paper or board machine, followed by pressing and drying to a finished paper or board. As the paper or board is sufficiently heated the foaming agent within the particles evaporates, causing expansion and foaming of the polymer coating, which adds to malleability of the board as it is moulded into a shaped article such as a board tray. The invention even covers production of doubly coated fibrous particles for use in said methods, the inner coating layer being of a foamable polymer with a higher melt flow rate and the outer coating layer being of a non-foaming polymer of a lower melt flow rate.

    Deep-drawn paper tray, a method and an apparatus for making it, and a tray-formed product package

    公开(公告)号:AU2013237287B2

    公开(公告)日:2017-02-23

    申请号:AU2013237287

    申请日:2013-03-15

    Applicant: STORA ENSO OYJ

    Abstract: The invention concerns a deep-drawn paper tray (4), particularly a shallow tray made of paperboard or cardboard, a method and an apparatus for manufacturing such a tray by deep-drawing techniques, and a closed product package comprising the tray of the invention, particularly a heat-sealed gas- and liquid-tight food package. The tray comprises a bottom (4a) and upwardly expanding side walls around the bottom, the side walls of the tray being shaped to expand through a plurality of circumferential steps (4b, 4c, 4d) dimensioned low enough for obtaining wrinkle-free side walls for the tray. The outermost step is a flat, wrinkle-free rim flange (4d), which enables liquid and gas proof heat-sealing of a lid to form the package. The apparatus according to the invention may comprise upper and lower moulding tools (10, 11) with concentric movable frames (10b, 10c, 10d) for forming the tray bottom and side wall steps to paper blanks, and moulding tools (10) may be mounted onto a rotating turret (9) carrying a paper blank through working stations arranged along the turret circumference, to shape the tray bottom and the side wall steps at the consecutive stations.

    Deep-drawn paper tray, a method and an apparatus for making it, and a tray-formed product package

    公开(公告)号:AU2013237287A1

    公开(公告)日:2014-09-25

    申请号:AU2013237287

    申请日:2013-03-15

    Applicant: STORA ENSO OYJ

    Abstract: The invention concerns a deep-drawn paper tray (4), particularly a shallow tray made of paperboard or cardboard, a method and an apparatus for manufacturing such a tray by deep-drawing techniques, and a closed product package comprising the tray of the invention, particularly a heat-sealed gas- and liquid-tight food package. The tray comprises a bottom (4a) and upwardly expanding side walls around the bottom, the side walls of the tray being shaped to expand through a plurality of circumferential steps (4b, 4c, 4d) dimensioned low enough for obtaining wrinkle-free side walls for the tray. The outermost step is a flat, wrinkle-free rim flange (4d), which enables liquid and gas proof heat-sealing of a lid to form the package. The apparatus according to the invention may comprise upper and lower moulding tools (10, 11) with concentric movable frames (10b, 10c, 10d) for forming the tray bottom and side wall steps to paper blanks, and moulding tools (10) may be mounted onto a rotating turret (9) carrying a paper blank through working stations arranged along the turret circumference, to shape the tray bottom and the side wall steps at the consecutive stations.

    UN PROCEDIMIENTO PARA LA PREPARACION DE UNA TAZA PARA BEBER DE CARTON.

    公开(公告)号:ES2268322T3

    公开(公告)日:2007-03-16

    申请号:ES03701564

    申请日:2003-02-07

    Applicant: STORA ENSO OYJ

    Abstract: Un procedimiento para fabricar una taza (10) para beber de cartón recubierto de polímero, caracterizado por las etapas de - proporcionar una pieza (1) de taza parecida a una lámina con partes para una tapa (5) de taza que se expande cónicamente y un marco exterior (6) que se expande cónicamente, estando dichas áreas separadas por una línea (4) de pliegue, - plegar la pieza (1) de la taza a lo largo de dicha línea (4) de pliegue, - doblar y unir mediante sellado térmico la pieza (1) plegada de la taza para producir una tapa (5) de taza que se expande hacia arriba cónicamente girando a la entrada (8) hasta un marco exterior (6) externo que se expande hacia abajo cónicamente, formando la línea (4) de pliegue la entrada de la taza y formando el marco exterior una superficie de agarre fuera de la tapa, y - proporcionando a la taza un fondo (11) sellado.

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