Refastenable pressure-sensitive tape closure system for...

Details Refastenable pressure-sensitive tape closure system for... Refastenable pressure-sensitive tape closure system for...

A - Human Necessities

61

F

2/138, 2/98.1

A61F 13/58 (2006.01)

Patent

CA 1139502

ABSTRACT OF THE DISCLOSURE In disposable diapers which are equipped with tape closure means and have an impermeable thin film backing, the improvement in which selected areas of the thin film, which areas serve as tape securement zones when the diapers are in use ! have uniformly adhered to that side of the film facing the diaper interior a layer of hot melt adhesive to provide a composite structure in the selected areas having a high resistance to tearing when tensile loads are applied. The hot melt adhesive layer has a lower modulus of elasticity than the film and is applied in heat-softened condition to obtain strong, uniform adherence to the film. In a method for applying the adhesive layer wide band of adhesive of predeter- mined thickness is extruded in heat-softened condition into direct contact with selected areas of a moving web of the film. The adhesive is one which has a Ring & Ball softening point lower than the heat distor- tion temperature of the film and during application will not thermally degrade or distort the film.

354438

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