Disposable diaper

Abstract

A disposable diaper according to the present invention includes a liquid permeable top sheet, a liquid impermeable back sheet, and a liquid retentive absorbent member interposed between the top sheet and the back sheet, and having a pair of inner sheets which are connected to the back sheet and are provided at opposite longitudinal side portions of the disposable diaper on its top sheet side such that the longitudinal inner side edges of the inner sheets are located inwardly along the longitudinal side edges of the absorbent member. Each of the inner sheets includes a laminate of a non-woven fabric and a film, and each inner sheet is arranged such that the non-woven fabric is located on the skin-contacting surface side of the diaper, and wherein the back sheet includes a laminate of non-woven fabric and a film. The back sheet is arranged such that the non-woven fabric is located on the outer skin-noncontacting surface side of the laminate.

1 . A disposable diaper comprising a liquid permeable topsheet, a liquid impermeable backsheet, and a liquid retentive absorbent member interposed between the topsheet and the backsheet, and having a pair of inner sheets which are connected to the backsheet and are provided at opposite longitudinal side portions of the disposable diaper on its topsheet side such that longitudinal inner side edges of the inner sheets are located inwardly along the longitudinal side edges of the absorbent member, 
 each of the inner sheets comprises a laminate of a non-woven fabric and a film, and is arranged such that the non-woven fabric is located on the skin-contacting surface side of the diaper, and wherein    the backsheet comprises a laminate of a non-woven fabric and a film, and is arranged such that the non-woven fabric is located on the outer skin-noncontacting surface side of the laminate.    
     
     
         2 . The disposable diaper according to  claim 1 , wherein 
 a first elastically expansible member is provided at connecting portions which are located between the backsheet and each of the inner sheets to form leg gathers, and a second elastically expansible member provided at each of the inner side edges of the inner sheets to form frill portion gathers,    the topsheet and the inner sheets are jointed together between the longitudinal side edges of the absorbent member and the inner side edges of the inner sheets to form frill portions such that the frill portion gathers define free edges, and approximate center portions of the frill portion gathers along the longitudinal direction thereof and inner portions located inwardly from the approximate centers of the leg gathers along the longitudinal direction thereof are joined together such that the frill portions and the leg gathers are raised.    
     
     
         3 . The disposable diaper according to  claim 1 , wherein each of longitudinal side portions of a rear waist body portion of the diaper has on its topsheet side a fixing member for fixing the rear waist body portion to a front waist body portion of the diaper when the diaper is worn.  
     
     
         4 . The disposable diaper according to  claim 3 , wherein each of the fixing members comprises a mechanical fastener provided on a surface of a support member.  
     
     
         5 . A disposable diaper comprising a liquid permeable topsheet, a liquid impermeable backsheet, and a liquid retentive absorbent member interposed between the topsheet and the backsheet, and having a pair of inner sheets which are connected to the backsheet and are provided at opposite longitudinal side portions of the disposable diaper on its topsheet side such that longitudinal inner side edges of the inner sheets are located inwardly along the longitudinal side edges of the absorbent member, 
 first elastically expansible members provided at connecting portions which are located between the backsheet and each of the inner sheets to form leg gathers, and second elastically expansible members provided at each of the inner side edges of each of the inner sheets to form frill portion gathers,    the topsheet and the inner sheets being jointed together between the longitudinal side edges of the absorbent member and the inner side edges of the inner sheets to form frill portions such that the frill portion gathers define free edges, and wherein approximate center portions of the frill portion gathers along the longitudinal direction thereof and inner portions located inwardly from the approximate centers of the leg gathers along the longitudinal direction thereof are joined together such that the frill portions and the leg gathers are raised.    
     
     
         6 . The disposable diaper according to  claim 5 , wherein the backsheet comprises a laminate of a non-woven fabric and a film, and is arranged such that the non-woven fabric is located on the outer skin-noncontacting surface side of the laminate.  
     
     
         7 . The disposable diaper according to  claim 5 , wherein each of the inner sheets comprises a laminate of a non-woven fabric and a film, and is arranged such that the non-woven fabric is located on the side of the skin-contacting surface of the diaper.  
     
     
         8 . The disposable diaper according to  claim 5 , wherein each of longitudinal side portions of a rear waist body portion of the diaper has on its topsheet side a fixing member for fixing the rear waist body portion and a front waist body portion of the diaper when the diaper is worn.  
     
     
         9 . The disposable diaper according to  claim 8 , wherein each of the fixing members comprises a mechanical fastener provided on a surface of a support member.  
     
     
         10 . The disposable diaper according to  claim 1 , wherein the total width of the inner sheets provided at opposite longitudinal side portions of the disposable diaper is 55% or more of the width of the disposable diaper.  
     
     
         11 . A disposable diaper comprising a liquid permeable topsheet, a liquid impermeable backsheet, and a liquid retentive absorbent member interposed between the topsheet and the backsheet, and having a pair of liquid impermeable folded-back sheets which are connected to the backsheet and are provided at opposite longitudinal side portions of the disposable diaper on its topsheet side, and an area on the topsheet side other than the folded-back sheets which serves as a liquid absorbing area, and 
 a pair of elastically expansible members provided at least at opposite side edge portions of the diaper to form leg gathers.    
     
     
         12 . The disposable diaper according to  claim 11 , wherein longitudinal inner side edges of the folded-back sheets are located outwardly of the widthwise narrowest portion of the absorbent member.  
     
     
         13 . The disposable diaper according to  claim 11 , wherein longitudinal inner side edges of the folded-back sheets are located inwardly of the widthwise narrowest portion of the absorbent member.  
     
     
         14 . The disposable diaper according to  claim 11 , wherein the backsheet and the folded-back sheets are formed into a unitary body and each comprises a laminate of a non-woven fabric and a film, and are arranged such that the film is located on the side facing the absorbent member.  
     
     
         15 . The disposable diaper according to  claim 11 , wherein longitudinal upper and lower end portions of the backsheet are folded back on the side of the topsheet, and the folded-back portions are provided with elastically expansible members to form rear waist gathers and front waist gathers, respectively.  
     
     
         16 . The disposable diaper according to  claim 11 , wherein each of longitudinal side portions of a rear waist body portion of the diaper has on its topsheet side a fixing member for fixing the rear waist body portion and a front waist body portion of the diaper when the diaper is worn.  
     
     
         17 . The disposable diaper according to  claim 16 , wherein each of the fixing members comprise a mechanical fastener on a surface of a support member.  
     
     
         18 . The disposable diaper according to  claim 11 , wherein a plurality of elastically expansible members are provided at least at opposite side edge portions of the diaper to form leg gathers, and the degree of elongation of the elastically expansible members become greater as the plurality of elastically expansible members go outwardly, so that the leg gathers form rounded-shapes.