A seam joining together at least two web materials

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 65/02 (2006.01) B29C 65/08 (2006.01)

Patent

CA 2657705

A seam joining together at least two web materials in an overlapped manner, wherein the overlapped portions are bonded together by ultrasonic welding, heat bonding, laser welding or the like, in a bonding pattern (4) extending over at least a part of the overlapped portion (3) to form said seam. The bonding pattern comprises a main bonding pattern (8) extending in longitudinal direction along at least a part of the overlapped portion (3), and at least one edge bonding pattern (9) extending in longitudinal direction along at least a part of along and adjacent at least one side edge (1 a, 2a) of the overlapped portion, the bonded area of said edge bonding pattern occupying no more than 30 % of the total bonded area of the central bonding pattern plus the bonded area of the edge bonding pattern. The seam may be present in a personal care absorbent article.

La présente invention concerne un joint reliant au moins deux matériaux de type bande de manière à les superposer. Les sections superposées sont liées les unes aux autres par soudage aux ultrasons, thermocollage, soudage au laser ou d'autres procédés analogues, en vue de parvenir à un motif de liaison (4) s'étendant sur une partie au moins de la section superposée (3) afin de former ledit joint. Le motif de liaison comprend : un motif de liaison principal (8) qui s'étend, dans la direction longitudinale, le long au moins d'une partie de la section superposée (3) ; et au moins un motif de liaison de bord (9) qui s'étend, dans la direction longitudinale, au moins le long d'une partie se trouvant le long de et adjacente à au moins un bord latéral (1a, 2a) de la section superposée. La surface liée dudit motif de liaison de bord ne représente pas plus de 30 % de la surface liée globale du motif de liaison central additionnée à la surface liée du motif de liaison de bord. Le joint peut se trouver dans un article absorbant destiné aux soins personnels.

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