Adhesive system for mechanically post-treated absorbent structures

Abstract

An absorbent structure that includes: (1) a liquid permeable cover made up of a matrix of fibrous materials where the matrix has upper and lower surfaces and a plurality individual exposed fiber surfaces at or adjacent with each surface of the matrix; (2) at least one layer of at least one liquid management material having a upper and lower surface; and (3) an adhesive system that joins at least a portion of the lower surface of the liquid permeable cover and the upper surface of the liquid management material.. The continuous layer of adhesive overlaying the permeable cover material desirably has a basis weight of 7.5 gsm or less. For example, layer of adhesive may have a basis weight of 4 gsm or 1.0 gsm or less .The absorbent structure may be mechanically post-treated. For example, the absorbent structure may be introduced into a nip and/or subjected to mechanical post treatments such as, for example, embossing, perforating, brushing, creping, aperturing and the like. A method of making an absorbent structure that may include the following steps: (1) providing at least a first fibrous material with an upper and lower surface and a second fibrous material with an upper and lower surface; (2) joining the lower surface of the first fibrous material and the upper surface of the second fibrous material with an adhesive to form an absorbent structure; and (3) mechanically post-treating the absorbent structure. A method of maintaining an aperture in a fibrous laminate which may include the steps of: (1) providing at least a first fibrous material with an upper and lower surface and a second fibrous material with an upper and lower surface; (2) joining the lower surface of the first fibrous material and the upper surface of the second fibrous material with an adhesive to form a fibrous laminate; and (3) aperturing the fibrous laminate such that at least one aperture passes through at least one of the fibrous materials and into the other fibrous material such that the adhesive that joins the tow fibrous materials is adapted to maintain the tow fibrous materials in position to define individual apertures.

Dependencies are inferred from the claim text.