| 摘要 |
A welding method for a disposable diaper includes the steps of putting wing-like portions 21, 22 provided on front and rear bodies 5, 6 including a topsheet 2, a backsheet 3 and a core 4 sandwiched therebetween, one upon another, with the topsheet disposed face to face; placing covering sheets 20 on an outer surface of the wing-like portions, both the covering sheets and the wing-like portions having a melting point higher than themelting point of the backsheet; and welding, under heat and pressure exerted from above the covering sheets, laterally opposite side edges of the wing-like portions.
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