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    Filter paper for cigarette filters
    11.
    发明授权
    Filter paper for cigarette filters 有权

    公开(公告)号：US11083217B2

    公开(公告)日：2021-08-10

    申请号：US16087172

    申请日：2017-01-24

    Applicant: DELFORTGROUP AG

    Inventor： Stefan Bachmann ,  Christian Mair ,  Dietmar Volgger

    IPC: A24D3/10 ,  D21H11/00 ,  D21H15/06 ,  D21H27/08 ,  A24D3/06 ,  D21H27/00

    Abstract: Disclosed herewith is a filter paper for manufacturing filters for smoking articles, in particular filter cigarettes, with the following properties the filter paper comprises fibers comprising pulp fibers, at least 80% by weight, preferably at least 90% by weight, particularly preferably at least 95% by weight and highly particularly preferably 100% by weight of the filter paper is formed by long-fiber pulp fibers, of the fibers, a proportion with respect to the number of the fibers of between 2% and 10%, preferably between 3% and 9% and particularly preferably between 4% and 8% has a length of less than 0.2 mm, the air permeability of the filter paper, measured in accordance with ISO 2965:2009, is between 500 cm·min−1·kPa−1 and 15000 cm·min−1·kPa−1 and preferably between 1000 cm·min−1·kPa−1 and 9000 cm·min−1·kPa−1, the number-averaged length of the fibers in the filter paper is greater than 1 mm and less than 5 mm, preferably greater than 2 mm and less than 4 mm, and the number-averaged width of the fibers in the filter paper is between 10 μm and 50 μm, preferably between 20 μm and 40 μm, and particularly preferably between 25 μm and 35 μm.

    Use of cellulosic fibre pulp
    15.
    发明授权
    Use of cellulosic fibre pulp 有权

    公开(公告)号：US10704199B2

    公开(公告)日：2020-07-07

    申请号：US15760036

    申请日：2016-09-13

    Applicant: Smurfit Kappa Paper Holdings France

    Inventor： Jean Henaff ,  Ronald Bredemo

    IPC: D21H11/14 ,  D21H27/10 ,  D21H11/00 ,  D21H11/04

    Abstract: Use of cellulosic fibre pulp having a Schopper-Riegler number according to ISO 5267-1 of about 70 or more as an additive to papermaking pulp for enhancing compressive strength of paper or board manufactured from the papermaking pulp. A process for enhancing compressive strength of paper or board manufactured from a papermaking pulp, comprising use of a cellulosic fibre pulp having a Schopper-Riegler number according to ISO 5267-1 of about 70 or more as a component of the papermaking pulp.

    Hydrophobically sized fibrous web and a method for the preparation of a sized web layer
    20.
    发明授权
    Hydrophobically sized fibrous web and a method for the preparation of a sized web layer 有权

    公开(公告)号：US10364533B2

    公开(公告)日：2019-07-30

    申请号：US15588045

    申请日：2017-05-05

    Applicant: STORA ENSO OYJ

    Inventor： Isto Heiskanen ,  Karita Kinnunen ,  Tuomo Hjelt

    IPC: D21H27/30 ,  D21H21/16 ,  D21H21/24 ,  D21H21/56 ,  D21H17/17 ,  D21H17/22 ,  D21H11/18 ,  D21H11/02 ,  D21H11/00 ,  D21F11/00

    Abstract: A hydrophobically sized fibrous web layer, preparation of a fibrous web or a fiber-based coating, a multilayer board product having at least a middle layer formed of said fibrous web, as well as use of a heat-sensitive surfactant for said methods and products, whereby microfibrillated cellulose (MFC) and hydrophobic size are brought to a foam with water and the heat-sensitive surfactant, the foam is supplied to a forming fabric of a paper or board machine, dewatered by suction of air through the forming fabric, and dried to a web product. Alternatively the foam may be supplied onto a premade fibrous web and dried to form a coating layer. The hydrophilic functionality of the surfactant contained in the web may be destroyed by heating. Pulp of a greater fiber length, such as CTMP, may be included, to provide improved wet and dry tensile strength for the paper and board products.

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