D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
D21H 27/38 (2006.01) B65D 65/40 (2006.01) D21H 27/10 (2006.01) D21H 11/02 (2006.01) D21H 11/04 (2006.01) D21H 11/14 (2006.01) D21H 11/18 (2006.01) D21H 19/22 (2006.01) D21H 19/84 (2006.01)
Patent
CA 2296435
A cardboard with great rigidity and low grammage, as well as a package made thereof, is described. The cardboard consists of a core, which is surrounded by at least one, preferably 1-3 outer plies, on each side. The cardboard has a grammage of 100-300 g/m2, a bending resistance index of at least 25 Nm6/kg3, preferably of 30-60 Nm6/kg3, and a Scott Bond z-strength of at least 100 J/m2. The core of the cardboard mainly consists of chemi-thermomechanical pulp and has a density of 200-450 kg/m3 and the core constitutes 55-80 % of the total grammage of the cardboard. The outer plies have a tensile stiffness index of 7.0-9.5 kgNm/g and mainly consist of chemical pulp.
L'invention concerne un carton à grande rigidité et faible grammage, ainsi qu'un emballage à base de ce carton. Le carton comprend un coeur entouré par au moins un pli externe, et de préférence par un à trois plis externes, de chaque côté. Le carton a un grammage de 100-300 g/m<2>, un indice de résistance à la courbure d'au moins 25 Nm<6>/kg<3>, de préférence compris entre 30 et 60 Nm<6>/kg<3>, et une résistance à la traction dans la direction Z (Scott Bond) d'au moins 100 J/m<2>. Le coeur du carton est essentiellement à base de pâte chimico-thermomécanique et a une densité de 200-450 kg/m<3>. Ledit coeur représente 55-80 % du grammage total du carton. Les plis externes ont un indice de résistance à la traction de 7,0-9,5 kgNm/g et sont essentiellement à base de pâte chimique.
Fetherstonhaugh & Co.
Stora Enso Ab
Stora Kopparbergs Bergslags Ab
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