Mechanical closure with slit carrier for disposable diapers

A disposable diaper having opposed first and second ends and a fastening system for releasably securing said diaper ends together about a user, said fastening system including tab members secured to said first end of said diaper and a landing member secured to said second end of said diaper, said tab members and landing member being adapted to mechanically engage and disengage for diaper closure and opening, each of said tab members having a length along which they respectively engage said landing member, each said tab member including an extensible facestock superposed on and secured to a mechanical fastener, said mechanical fastener being coextensive with at least a portion of said tab member, said mechanical fastener including an ordinarily nonextensible substrate having opposed substrate faces, one of said substrate faces being secured to said facestock and the other of said substrate faces having discrete engagement members projecting therefrom, said substrate having in at least a portion thereof a plurality of separation interfaces extending through the thickness of the substrate at spaced locations in the direction of the length of said tab, said interfaces separating upon application of tension loads in the direction of the length of said tab to thereby render said substrate extensible.