Fit and sustained fit of a diaper via chassis and core modifications

An absorbent article for fitting about a wearer to contain body exudates, the wearer having a low motion zone, the absorbent article comprising:

• a containment assembly having a front waist region, a back waist region opposed to the front waist region, a first end, a second end, longitudinal edges extending between said first end and said second end, and a longitudinal axis, said containment assembly further comprising:
• a topsheet;
• a backing sheet;
• an anatomically low motion zone-fitting absorbent core positioned between said topsheet and said backsheet, said absorbent core having a first end adjacent to said front waist region defining a front relatively narrow portion, a substantially triangular shaped second end adjacent to said back waist region defining an enlarged back portion, and an elongated, relatively narrow crotch portion located between said first end and said second end and defined by longitudinally extending substantially parallel side edges, said back portion having a generally continuously increasing width as the back portion progresses rearwardly from said crotch region to said second end, said absorbent core being positioned within said containment assembly such that a majority of the material comprising the absorbent core is disposed along the back portion, said absorbent core including a plurality of layers, said plurality of layers including a first layer and a second layer, said first layer being located closer to said topsheet than said second layer and having smaller peripheral dimensions along at least a portion thereof than said second layer;
• and
• closure means for anchoring the absorbent article on the wearer, said closure means including a plane of tension along at least the front waist region of the containment assembly to assist in precluding rollover of said front waist region upon closure of the absorbent article.

An absorbent article for fitting about a wearer to contain body exudates, the wearer having a low motion zone, the absorbent article comprising:

• a containment assembly having a front waist region, a back waist region opposed to the front waist region, a first end, a second end, longitudinal edges extending between said first end and said second end, a longitudinal axis and a leg closure assembly including leg elastics for accomplishing closure about the wearer's legs, said containment assembly further comprising:
• a topsheet, a backing sheet, and an anatomically low motion zone fitting absorbent core positioned between said topsheet and said backsheet, said absorbent core having a first end adjacent to said front waist region defining a relatively narrow front portion, a substantially triangular shaped second end adjacent to said back waist region defining an enlarged back portion, and an elongated, relatively narrow crotch portion located between said first end and said second end and defined by longitudinally extending substantially parallel side edges, said back portion having a generally continuously increasing width as the back portion extends rearwardly from said crotch region to said second end, said absorbent core being positioned within said containment assembly such that approximately 75% of the material comprising the absorbent core is disposed along the back portion;
• and
• closure means for anchoring the absorbent article on the wearer, said closure means including a primary fastening system and a waist closure system, said waist closure system comprising:
• a pair of spaced apart mechanical fasteners disposed along the back waist region of the containment assembly on said backing sheet, said mechanical fasteners being disposed substantially parallel to the longitudinal axis of said containment assembly to form a pair of elongated longitudinally-extending stiffening beams;
• and
• complimentary mechanical fastener landing surfaces disposed along the front waist portion of the containment assembly, whereby upon properly attaching the absorbent article to a wearer, the mechanical fasteners engage the mechanical fastener landing surfaces to provide a plane of tension along at least the front waist region of the absorbent article.