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"Quick Grab Tabs" Easy Opening Prefastened Diaper

IP.com Disclosure Number: IPCOM000028508D
Publication Date: 2004-May-17
Document File: 8 page(s) / 205K

Publishing Venue

The IP.com Prior Art Database

Abstract

An improvement for disposable diapers for infants is to offer disposable diapers in a prefastened configuration. The prefastened configuration allows parents to pull the disposable diaper up over the child's hips like a training pant or to open the diaper and apply the diaper in the traditional method.

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"Quick Grab Tabs" Easy Opening Prefastened Diaper

An improvement for disposable diapers for infants is to offer disposable diapers in a prefastened configuration. The prefastened configuration allows parents to pull the disposable diaper up over the child's hips like a training pant or to open the diaper and apply the diaper in the traditional method. The prefastened diaper has elastic back ears with Velcro® style hooks attached at the ends of the back ears. A representative prefastened diaper is shown in Fig. 1 in an unfastened, laid flat configuration. The elastic back ears are attached to the back of the prefastened diaper as shown in Fig. 1. The elastic ears allow the prefastened diaper to be expanded and easy to pull on like a training pant. The fasteners are engaged in the front of the prefastened diaper into a Guilford® style looped material. The prefastened diaper may also include a pair of front chassis ears, also shown in Fig. 1. A problem may arise when the prefastened diaper is pulled up on the child. The front chassis ears tend to fold downward since the fasteners are attached inboard of the edges of the front chassis ears. Parents then have to unfastened and straighten out the front chassis ears. An approach to solve this potential problem is to extend the loop material attached to the front of the prefastened diaper beyond the edges of the front of the chassis. The chassis typically includes inner and outer facings that capture and hold the absorbent in place in the prefastened diaper. During manufacture, the prefastened diaper is folded in half in order to match each side of the extended loop material with the elastic back ear on the same side. A passive bond is employed to attach the front loop extension to the elastic back ear using any suitable thermal or adhesive bond. The passive bond has at least two functions. First, the passive bond must be strong enough to keep the front chassis ear and loop extension from folding downward, that is, alignment. Second, the passive bond must allow separation of the front extended loop material from the elastic back ear with minimal force. The force to separate the loop material from the elastic back ear should be less than about 2000g. This strength is a peak load in an angled peel test that replicates what is done by the parent when separating the loop material from the elastic back ear. The force to separate the loop material from the elastic back ear is desirably also stronger than 50 g. peak load in the same test to assure that the two layers do not separate allowing the front chassis ear and extended loop to fold downward. Parents may have experienced difficulty separating the two layers since they do not know where or how to separate the loop material from the back elastic ear. Separating the materials may be made easier by having the passive bond inboard of the extended loop edge. If this distance is greater than 3 mm, then parents have a tab that is easy to find and...