The present invention relates to a disposable diaper having a fastening system for connecting a front waist and a rear waist of the diaper to each other.
Japanese Laid-Open Utility Model Application No. Hei7-22725 discloses a disposable diaper having tape fasteners extending outward from transversely opposite side edges of a rear region of the diaper adapted to be releasably fastened to receiving sheets bonded to an outer surface of a front region of the diaper, wherein graduations are marked on the receiving sheets in circumferentially around a waist of the diaper. These graduations serve as a positioning indicator when the tape fasteners are fastened to the receiving sheets so that these graduations may be utilized to maintain a tightening force around a wearer's waist at a constant level.
The receiving sheets are generally made of a plastic film or nonwoven fabric and the graduations are printed on surfaces of these receiving sheets. Particularly in the case of a baby diaper, materials used for the diaper should be carefully selected from the viewpoint of a sanitary security, since a baby often places their fingers or various other objects into their mouth. While hygienically innocuous ink is used for printing the graduations, it is desired to avoid contact between the ink and a baby's mouth.
Accordingly, it is a principal object of the invention to eliminate a demand of printing the graduation and to prevent regions occupied by the receiving sheets from becoming unacceptably rigid by utilizing a pattern in which an adhesive for bonding the receiving sheets to the front region is applied as the graduations.