Method and device for producing a shaped non-woven, non-woven obtained and use thereof
AssigneeCentre Technique Industriel dit: Institut Textile de France
InventorRobert M. Bolliand
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Abstract
A method for producing a shaped non-woven comprises the steps of feeding fibers on a carding machine over a limited width, superposing on a receiving system the fibrous web leaving the carding machine and needling the superposed layers. The superposition is preferably obtained by winding over a cylindrical drain. The shaped non-woven obtained has a thickness gradually decreasing towards its selvedges. The obtained strip has a cross-section of an asymmetrical shape by longitudinal cutting along the median axis and optionally two longitudinal cuttings on the selvedge side.
Claims4
A method for producing a shaped non-woven, comprising the following steps:
- a) feeding fibers into carding machine, in sequential manner over median portions narrowing from one sequence to another;
- b) superposing layers of a fibrous web leaving said carding machine on a receiving system;
- c) feeding the fibrous web over a limited width 1 of the carding machine, the width L is smaller that the width L of the receiving system, and superposing the sequentially narrowing fibrous web leaving said machine in at least ten layers and needling the superposed layers.
The method of claim l or 2, wherein the fiber feeding is controlled to reach a median portion of the carding machine.
Dependencies are inferred from the claim text.