Patent ID: 7722943
Filing Date: 2010-05-25
Classification: A61F,Y10T

Abstract:
1. A fastener strip for diapers comprising: (a) a center part elastic in a longitudinal direction of the fastener strip when the fastener strip is pulled; (b) a non-elastic end part having a hook element; and c) a non-elastic connector part for attachment to a diaper; wherein said end part and said connector part are attached to said center part and the longitudinal direction of the fastener strip extends from said connector part to said end part; wherein said center part has a layer of an elastic spun-bonded non-woven fabric having selected stretching properties in the longitudinal direction of the fastener strip; wherein the spun-bonded non-woven fabric comprises filaments having a filament core of a thermoplastic elastomer and a filament mantle of a non-elastic thermoplastic polymer stretched by pre-stretching the spun-bonded nonwoven fabric in a stretching direction which corresponds to the longitudinal direction of the fastener strip; wherein said non-elastic filament components are cold-stretched as a result of said pre-stretching; wherein the center part comprises an elastic carrier film having first and second sides, the spun-bonded non-woven fabric being laminated onto one or both of said first and second sides; wherein said pre-stretching determines an elongation limit; wherein said center part can be stretched to said elongation limit and, when stress is relieved, returns elastically to its original status; and wherein when the clearly perceptible elongation limit is reached, a great increase in the force required for further stretching is noticed.