Absorbent cores for disposable absorbent articles

An absorbent core for an absorbent article, the absorbent core comprising:

• a) a fluid distribution layer in the form of a unitary, heterogenous structure and comprising:
• i) a first sub-layer, wherein the first sub-layer comprises a first amount of multicomponent binder fibers or cross-linked cellulose fibers, or a combination thereof, and the first sub-layer is between 20% and 60% by weight of the fluid distribution layer;
• ii) a second sub-layer, wherein the second sub-layer comprises treated or untreated pulp and a second amount of multicomponent binder fibers, cross linked cellulose fibers, or a combination thereof, wherein the % by weight of the first amount of the multicomponent binder fibers, the cross-linked cellulose fibers, or the combination thereof of the first sub-layer is greater than the % by weight of the second amount of the multicomponent binder fibers, the cross-linked cellulose fibers, or the combination thereof of the second sub-layer;
• and
• iii) one or more additional sub-layers positioned adjacent to the second sub-layer and away from the first sub-layer, wherein the one or more additional sub-layers comprise multicomponent binder fibers, cross-linked cellulose fibers, or a combination thereof in an amount, in % by weight, that is the same or less than the second amount of the multicomponent binder fibers, the cross-linked cellulose fibers, or the combination thereof of the second sub-layer;
• and
• b) a fluid storage layer, wherein the fluid storage layer comprises at least 50% by weight of a super absorbent polymer and a surface area of the fluid storage layer is less than a surface area of the fluid distribution layer, wherein
• the first sub-layer is positioned to be oriented towards a user of the absorbent core,
• the second sub-layer is positioned to be oriented further away from the user than the first sub-layer,
• the second sub-layer is sandwiched between the first sub-layer and the one or more additional sub-layers,
• the fluid distribution layer is formed as an airlaid material,
• the fluid distribution layer is embossed and does not include any adhesives, and
• the fluid storage layer is positioned to be oriented further away from the user than the fluid distribution layer.