Hydraulically entangled nonwoven material and method for making it

Inactive Publication Date: 2005-02-03
SCA HYGIENE PROD AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0009] The object of the present invention is to provide a hydroentangled nonwoven material that combines properties like wet strength, absorptive capacity, softness and drapability. This has been achieved by a wetlaid or foam formed hydraulically entangled nonwoven material containing at least 30%, by weight, pulp fibres and at least 20%, by weight, man-made fibres or filaments, said nonwov

Problems solved by technology

One disadvantage with using wires of this type is that the fibre web, during the hydroentanglement, is exerted to a strong action by the water jets and will penetrate into and get caught between the wire threads.
It may then be difficult to separate the final product from the w

Method used

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  • Hydraulically entangled nonwoven material and method for making it
  • Hydraulically entangled nonwoven material and method for making it
  • Hydraulically entangled nonwoven material and method for making it

Examples

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Embodiment Construction

[0031] The device, which schematically is shown in FIG. 1, for manufacturing a so-called hydroentangled or spunlaced material, comprises a vessel 10, e g a pulper, in which a wet or foamed fibre dispersion is prepared, which via a headbox 11 is distributed on a foraminuous support member 12. This foraminuous support member 12 is preferably a wire of any conventional kind used in papermaking industry and which is suited for formation and for a first hydroentangling step to intertwine at least the man-made fibres present in the web The formed fibrous web 13 is then subjected to hydroentanglement from several rows of nozzles 14, from which water jets at a very high pressure are directed towards a fibrous web, while this is supported by the foraminous support member 12. The fibrous web is drained over suction boxes 15. Thereby, the water jets accomplish an entanglement of the fibrous web, i.e. an intertwining of the fibres. Appropriate pressures in the entanglement nozzles are adapted t...

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Abstract

A wetlaid or foam formed hydraulically entangled nonwoven material containing at least 30%, by weight, pulp fibres and at least 20%, by weight, man-made fibres or filaments. The material has a basis weight variation in a non-random pattern in that it comprises a plurality of higher basis weight cushions protruding from one major surface of the material. The cushions as a main component comprise pulp fibres and are surrounded by a lower basis weight network which as a main component comprises the man-made fibres or filaments. The invention further refers to a method for making the material.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application is a division of co-pending application Ser. No. 10 / 400,673, filed on Mar. 28, 2003, which is a non-provisional of 60 / 367,712 filed Mar. 28, 2002 the entire contents of which are hereby incorporated by reference.FIELD OF THE INVENTION [0002] The present invention refers to a wetlaid or foam formed hydraulically entangled nonwoven material containing at least 30%, by weight, pulp fibres and at least 20%, by weight, man-made fibres. It further refers to a method of making such a material. BACKGROUND OF THE INVENTION [0003] Hydroentangling or spunlacing is a technique introduced during the 1970'ies, see e g CA patent no. 841 938. The method involves forming a fibre web, which is either drylaid or wetlaid, after which the fibres are entangled by means of very fine water jets under high pressure. Several rows of water jets are directed against the fibre, web which is supported by a movable wire. The entangled fibre web is th...

Claims

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Application Information

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IPC IPC(8): D04H1/46D21F1/00D21F11/00D21H27/02
CPCD04H1/465D21F1/0063D21F11/00D21F11/002Y10T428/24479D21H27/02Y10T428/24612Y10T428/24603Y10T428/24595D21F11/006D04H1/495Y10T442/689
Inventor STRANDQVIST, MIKAEL
Owner SCA HYGIENE PROD AB
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