Apparatus and method for producing nonwovens
AssigneeAndritz Perfojet SAS
InventorsFrédéric NOELLE, Laurent SCHMIT, Christophe MUFFAT-JEANDET
Life of this patent
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Abstract
Apparatus for producing nonwovens, comprising a card drum (1) rotated in a first direction of rotation, a transfer cylinder (2) rotated in a second direction of rotation opposite to the first direction of rotation, at least one doffer (3, 4), at least one condenser (5, 6), at least one stripper roll (7, 8), a first endless conveyor belt (9), a suction drum (10) and a second endless conveyor belt (10).
Claims17
Apparatus for producing nonwovens in a drylaid process in which fibres travel in a travelling direction, comprising:
- a card drum (1) rotated in a first direction of rotation and at a first circumferential rotational speed by a first driving means, producing a fibre web in the process,
- characterised in that the apparatus comprises, immediately downstream of the drum (1) in the direction in which the fibres travel in the apparatus, a transfer cylinder (2) rotated in a second direction of rotation, opposite to the first direction of rotation, and at a second circumferential rotational speed by a second rotation means, the second circumferential rotational speed being greater than the first circumferential rotational speed, the transfer cylinder (2) having, on a periphery, a lining (G) comprising a plurality of teeth (16) that are angled with respect to a radius of the transfer cylinder (2) and are oriented in the second direction of rotation, and, immediately downstream of the transfer cylinder (2), a system that comprises, immediately sequentially in a travelling direction, at least one doffer (3, 4), at least one condenser (5, 6), at least one stripper roll (7, 8), a first endless conveyor belt (9) with an upper side, a suction drum (10), and a second endless conveyor belt (11) with an upper side, the suction drum (10) being adjacent to the upper side of each of the first and second conveyor belts (9, 11) and ensuring the fibres pass from one to the other.
A nonwoven product based on artificial and/or synthetic fibres, having a weight between 45 and 80 g/m2, wherein the fibres have a titre between 1.3 and 2.2 dtex, a length between 30 and 50 mm, a ratio of strength in a machine direction to strength in a cross direction from 1.0 to 1.5, an elongation in the machine direction between 35 and 70%, and an elongation in the cross direction between 70 and 130%.
Dependencies are inferred from the claim text.