Patents

Absorbent article

May 12, 2014

US Patent No.: 8,641,695 B2
Inventor(s): Kerstin Edwall, Lindome, Sweden; Margareta Wennebäck, Mölnlycke, Sweden; and Elisabeth Lakso, Stenungsund, Sweden.
Company: SCA Hygiene Products AB, Göteborg, Sweden.
Filed: 1/14/08
Issued: 2/4/14

An absorbent article comprising a front portion, a back portion, a crotch portion, the crotch portion being arranged between the front portion and the back portion, a front waist portion which is located at an edge of the front portion which is distal from the crotch portion in a longitudinal direction of the article, and a back waist portion which is located at an edge of the back portion which is distal from the crotch portion in a longitudinal direction of the article, the front portion and the back portion each comprising at least one first elastic web material, the crotch portion being made of a second web material, said second web material being different than said first elastic web material, said second web material being inelastic or having a degree of elasticity which is different than the elasticity of the first elastic web material, said front waist portion comprising a third web material, said third web material being the same as said second web material, said back waist portion comprising a fourth web material, said fourth web material being the same as said second web material, wherein the front portion and the back portion are ultrasonically welded to the crotch portion along respective first and second ultrasonic weld seams extending in a transversal direction of the absorbent article, said front waist portion is welded to said front portion via a third ultrasonic weld seam, said back waist portion is welded to said back portion via a fourth ultrasonic weld seam, and at least one of the first, second, third and fourth ultrasonic weld seams is reinforced by an additional layer of web material which is joined to the at least one of the first, second third and fourth weld seams or by glue to have a weld strength in a direction transverse to the at least one of the first and second ultrasonic weld seams which is at least 5N/25.4 mm.

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