Three dimensional profiling of an elastic hot melt pressure sensitive adhesive to provide areas of differential tension
AssigneeKimberly-Clark Worldwide, Inc.
InventorsThomas W. Odorzynski, Michael Joseph Garvey
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Abstract
Disclosed is a film formed from an elastomeric, hot melt, pressure-sensitive adhesive, with at least two different dimensions in the Z axis resulting in areas of differential tension when the film is stretched. The elastomeric and adhesive film further forms a liquid barrier. The elastomeric, hot melt, pressure-sensitive adhesive film with differential tension is particularly suitable for making a disposable absorbent garment.
Claims27
An elastomeric, hot melt, pressure-sensitive adhesive film having major surfaces in the X-Y plane and having at least two different material thicknesses in the Z axis, the different material thicknesses resulting in differential tensions when the elastomeric film is stretched.
A disposable absorbent article having a length and a width defining first and second waist portions and first and second longitudinal marginal portions, the article comprising:
- a backsheet layer;
- a topsheet layer;
- an absorbent structure located between said topsheet layer and the backsheet layer;
- and
- at least one elasticized area comprising an elastomeric adhesive film comprising a hot melt pressure sensitive adhesive elastomeric film having at least two different dimensions in the Z axis, the elasticized area being capable of elongation in a first direction, the elasticized area having a non-elongated original length in the first direction, the elasticized area being retractable after elongation to a length substantially equivalent to the original length and said elasticized area having a cold flow value of less than 20 percent at 54 degrees C.
A disposable absorbent article having a length and a width defining first and second waist portions and first and second longitudinal marginal portions, the article comprising the following components:
- a backsheet layer;
- a topsheet layer;
- and
- an absorbent structure located between said topsheet layer and the backsheet layer, the article including at least one elasticized area formed from an elastomeric, hot melt, pressure-sensitive adhesive film having at least two different Z axis dimensions, the elasticized area having a first component and a second component adhered to the elastomeric hot melt pressure-sensitive adhesive film, the elasticized area being elongateable in a first direction, the elasticized area having an original length in the first direction, the elasticized area being retractable after elongation to a length substantially equivalent to the original length, the elasticized area having the following properties:
- a) an adhesive bond strength sufficient to adhere the first and second components together during use of said disposable absorbent article;
- b) an elongation in at least one portion of the elasticized area of at least 50 percent;
- c) a retractive force in at least a first portion of the elasticized area of less than 400 grams force per inch width at 90 percent elongation and a retractive force in a second portion of the elasticized area greater than the retractive force in the first portion;
- d) a viscosity in at least one portion of the elasticized area of less than 70,000 centipoise at 177 degrees C.;
- and
- e) a cold flow value in at least one portion of the elasticized area of less than 20 percent at 54 degrees C.
Dependencies are inferred from the claim text.