Fibrous Structures and Methods for Making Same

Abstract

A layered fibrous structure having a first layer including a co-formed fibrous structure containing a plurality of first filaments and a plurality of solid additives and a second layer different from the first layer, wherein the second layer includes a plurality of second filaments is provided.

What is claimed is: 
     
         1 . A layered fibrous structure comprising:
 a. a first layer comprising a co-formed fibrous structure comprising a plurality of first filaments and a plurality of solid additives; and   b. a second layer different from the first layer, wherein the second layer comprises a plurality of second filaments deposited onto a surface of the co-formed fibrous structure such that the second layer exhibits a basis weight of less than 5 g/m 2 .   
     
     
         2 . The layered fibrous structure according to  claim 1  wherein the layered fibrous structure further comprises a third layer different from the first layer, wherein the third layer comprises a plurality of third filaments. 
     
     
         3 . The layered fibrous structure according to  claim 2  wherein the first layer is positioned between the second and third layers. 
     
     
         4 . The layered fibrous structure according to  claim 1  wherein at least one of the plurality of first and second filaments comprises a thermoplastic polymer. 
     
     
         5 . The layered fibrous structure according to  claim 4  wherein the thermoplastic polymer is selected from the group consisting of: polypropylene, polyethylene, polyester, polylactic acid, polyhydroxyalkanoate, polycaprolactone and mixtures thereof. 
     
     
         6 . The layered fibrous structure according to  claim 1  wherein at least one of the plurality of first and second filaments comprises a natural polymer. 
     
     
         7 . The layered fibrous structure according to  claim 6  wherein the natural polymer is selected from the group consisting of: starch, starch derivatives, cellulose, cellulose derivatives, hemicellulose, hemicellulose derivatives and mixtures thereof. 
     
     
         8 . The layered fibrous structure according to  claim 2  wherein at least one of the plurality of first, second, and third filaments comprises a thermoplastic polymer. 
     
     
         9 . The layered fibrous structure according to  claim 8  wherein the thermoplastic polymer is selected from the group consisting of: polypropylene, polyethylene, polyester, polylactic acid, polyhydroxyalkanoate, polycaprolactone and mixtures thereof. 
     
     
         10 . The layered fibrous structure according to  claim 2  wherein at least one of the plurality of first, second, and third filaments comprises a natural polymer. 
     
     
         11 . The layered fibrous structure according to  claim 10  wherein the natural polymer is selected from the group consisting of: starch, starch derivatives, cellulose, cellulose derivatives, hemicellulose, hemicellulose derivatives and mixtures thereof. 
     
     
         12 . The layered fibrous structure according to  claim 1  wherein at least one of the solid additives comprises a fiber. 
     
     
         13 . The layered fibrous structure according to  claim 12  wherein the fiber comprises a wood pulp fiber. 
     
     
         14 . The layered fibrous structure according to  claim 13  wherein the wood pulp fiber is selected from the group consisting of: Southern Softwood Kraft pulp fibers, Northern Softwood Kraft pulp fibers,  Eucalyptus  pulp fibers, Acacia pulp fibers. 
     
     
         15 . The layered fibrous structure according to  claim 1  wherein at least one exterior surface of the layered fibrous structure comprises a plurality of the second filaments. 
     
     
         16 . The layered fibrous structure according to  claim 2  wherein at least one exterior surface of the layered fibrous structure comprises a plurality of the second filaments and the other exterior surface of the layered fibrous structure comprises a plurality of the third filaments. 
     
     
         17 . The layered fibrous structure according to  claim 1  wherein the layered fibrous structure is convolutedly wound upon itself in the form of a roll. 
     
     
         18 . The layered fibrous structure according to  claim 1  wherein the layered fibrous structure further exhibits one or more of the following properties: a Dry CD Tensile Modulus of less than about 1500 g/cm and/or a Wet CD TEA of greater than about 35 (g·in)/in 2  and/or a Wet MD TEA of greater than about 40 (g·in)/in 2 . 
     
     
         19 . A sanitary tissue product comprising a layered fibrous structure according to  claim 1 . 
     
     
         20 . The sanitary tissue product according to  claim 19  wherein the sanitary tissue product is a wiping implement.