Method and apparatus for dry forming of a fabric
AssigneeDan-Web Holding A/S
InventorKenn Christensen
Life of this patent
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Abstract
A method and apparatus is described for use in dry forming a fabric by at least two non-woven fabrics. The upper run of the transfer wire is used as a forming wire. A forming head is disposed above the transfer wire. An airlaid non-woven fabric is formed on the transfer wire. This non-woven fabric is carried with the transfer wire onto the top side of the first non-woven fabric. The first non-woven fabric is formed on a preceding forming wire and transferred by the transfer wire to a subsequent conveying wire. This subsequent conveying wire can also be a forming wire so further non-woven fabric can be formed before the fabric is consolidated, e.g. by hydroentanglement or latex bonding/fibre bonding.
Claims10
Method for dry forming of a fabric, characterised in that a first non-woven fabric is formed and transferred between two forming or conveying wires by a transfer wire in a traditional way, that an airlaid, second non-woven fabric is formed at the top side of an upper run on the transfer wire by using at least one forming head, and that the non-woven fabric is led downwards and along the underside of the lower run of the transfer wire for being laid off on a subsequent conveying wire together with the first non-woven fabric.
Method for dry forming of a fabric, characterised in that a first non-woven fabric is formed in a first dry forming unit, as fibres are deposited on a first former wire over a vacuum box, that the fibre layer is transferred from the first former wire to the underside of a lower run on a transfer wire, as a vacuum is formed between the upper and lower runs of the transfer wire, that on the top side of the upper run of the transfer wire there is formed an airlaid second non-woven fabric by using at least one former head, and that said first non-woven fabric is sucked against the transfer wire and thereby also against the lower run by suction action through the second non-woven fabric, and that the two non-woven fabrics are transferred to a subsequent conveying wire being optionally a further former wire for forming a third non-woven fabric, preferably a carded non-woven fabric, upon the two previously formed non-woven fabrics.
Apparatus for dry forming of a fabric which is formed by at least two non-woven fabrics, characterised in that it includes a transfer wire which is disposed after a first former wire used for forming a first non-woven fabric, that at least one former head is placed at the top side of the upper run of the transfer wire, and that a vacuum box is provided between the upper and lower runs of the transfer wire.
Dependencies are inferred from the claim text.