Absorbent article with patterned SBS based adhesive
AssigneeThe Procter & Gamble Company
InventorsShunketsu Sue, Ebrahim Rezai, Ravindra Palitha Ranatunga
Life of this patent
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Abstract
An SBS based construction adhesive that includes an amount of SIS adhesive to make an SBS/SIS adhesive that shows excellent shear hang time values when used to manufacture disposable absorbent articles. The SBS/SIS adhesive is applied in a spiral pattern having a particular width and frequency to form an endflap seal that may reduce the likelihood of a gel on skin occurrence.
Claims15
A disposable absorbent article having a pair of opposing end edges and a pair of longitudinal side edges, the absorbent article comprising:
- a. a topsheet, a backsheet and an absorbent core disposed between the topsheet and backsheet, the absorbent core comprising particles of superabsorbent polymer;
- b. a spiral patterned SBS/SIS adhesive disposed on a portion of the disposable absorbent article at a spiral density of between 5 and 8 and a spiral width of between 5 and 25 mm, the adhesive joining a portion of the topsheet to a portion of the backsheet by an adhesive bond to form an endflap seal, the adhesive bond having a shear hang time of greater than 40 seconds as measured according to the Shear Hang Time Test;
- and
- c. at least one channel for permitting the escape of air from inside the article to an external environment but substantially preventing the escape of the superabsorbent polymer particles to the external environment, the channel being disposed between two spirals.
A process for forming an endseal on a disposable absorbent article, the process comprising the steps of:
- a. providing a topsheet material having a first pair of opposed transverse end regions, a backsheet material having a second pair of opposed transverse end regions, and an absorbent core configured to be positioned between the topsheet material and the backsheet material, the absorbent core comprising particles of superabsorbent polymer;
- b. applying an SBS/SIS adhesive to the first and/or second pair of transverse end regions in a spiral pattern at a spiral density of between 5 and 8 and a spiral width of between 5 and 25 mm;
- and
- c. adhesively bonding one or more portions of the first pair of transverse ends to one or more portions of the second pair of transverse ends with the adhesive such that the resulting joined portions form at least one endflap seal including one or more channels for permitting the escape of air from inside the article to an external environment and substantially preventing the escape of the superabsorbent polymer particles to the external environment, the channel being disposed between two spirals, the endflap seal having a shear hang time of greater than about 40 seconds as measured according to the Shear Hang Time Test.
A disposable absorbent article comprising:
- a. a topsheet, a backsheet and an absorbent core comprising particles of superabsorbent polymer disposed between the topsheet and backsheet;
- b. a covering material comprising at least one of a core cover and a dusting layer, the absorbent core being enveloped by the covering material to form a core package, the covering material being sealed along a seal line with an adhesive bond comprising an SBS/SIS adhesive to form a core package seal along at least one of the end edge(s) and side edge(s) of the core package;
- and
- c. the adhesive bond having a shear hang time of greater than about 40 seconds as measured according to the Shear Hang Time Test.
Dependencies are inferred from the claim text.