Thermal joining of webs

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 65/10 (2006.01) A61F 13/15 (2006.01) B29C 65/00 (2006.01) B29C 65/02 (2006.01) D06H 5/00 (2006.01)

Patent

CA 2271743

A method of joining at least two webs (11, 12), said webs (11, 12) being porous and comprising meltable components, said webs (11, 12) being arranged in an adjacent manner to form a web structure (10), said web structure (10), comprising outer surfaces (13, 14) and an area of overlap (15) between said webs (11, 12); said method characterised by the steps of: 1) sufficiently heating a fluid to enable at least a partial melting of said meltable components; 2) directing a high speed jet of said heated fluid towards at least one of said outer surfaces (13, 14); 3) allowing said fluid to penetrate said webs (11, 12) at discrete locations; and 4) allowing said fluid to circulate in said webs (11, 12) to at least partially melt said meltable components. In another aspect of the invention, a disposable absorbent article is made according to the method described herein.

L'invention concerne un procédé pour assembler au moins deux voiles (11, 12), ces voiles (11, 12) étant poreux et comprenant des composants fusibles, lesdits voiles (11, 12) étant disposés côte à côte de manière à former une structure (10) voile, cette structure (10) voile comprenant des surfaces (13, 14) extérieures et une zone de chevauchement (15) située entre lesdits voiles (11, 12). Ce procédé est caractérisé par les étapes suivantes: 1) chauffer suffisamment un fluide pour permettre auxdits composants fusibles de fondre au moins en partie; 2) diriger un jet dudit fluide chauffé en direction d'au moins une desdites surfaces (13, 14) extéerieures; 3) permettre à ce fluide de pénétrer dans les voiles (11, 12) en des points discrets; et 4) permettre à ce fluide de circuler dans lesdits voiles (11, 12) vers au moins un composant fusible ayant au moins partiellement fondu. Dans un autre aspect de l'invention, un article absorbant jetable est fabriqué conformément à ce procédé.

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