Gentile Victor R, Hepford Richard R, Jappe Nicholas A, Roberts Jr Clifford J, Steward Gunnar E: Absorbent unitary laminate-like fibrous webs and method for producing them. Scott Paper Company, Vickrey R Duke, Foley William J, April 22, 1975: US3879257 (179 worldwide citation)

Disclosed is a unitary or single-ply fibrous web having a laminate-like structure which consists of a soft, absorbent central core region of relatively low fiber concentration sandwiched between two strong, abrasion-resistant surface regions of higher fiber concentration. The surface regions have bo ...