Dispensing Package

Abstract

Dispensing packages are disclosed that are capable of dispensing soft-solid type antiperspirant compositions employing actives having a metal to chloride ratio of less than or equal to 1.3, and that are capable of exhibiting minimal weeping in between uses.

Description

FIELD OF THE INVENTION[0001]The present invention is directed to dispensing packages that are used to apply cream or soft solid type antiperspirant and deodorant compositions to the underarm. The present invention is also directed to antiperspirant products comprising a dispensing package and an antiperspirant composition containing a high efficacy antiperspirant active.BACKGROUND OF THE INVENTION[0002]Swivel-up dispensing packages are typically employed for dispensing and applying cream antiperspirant compositions. Known swivel-up dispensing packages include a composition chamber, an applicator surface, a turn wheel that drives a feed screw, and an elevator threadably engaged with the feed screw, which applies pressure to the composition as it is advanced towards the applicator surface. Weeping onto the applicator surface following a not mal dispensing and application event can however be an undesirable side effect of this type of dispensing package. Residual pressure within the co...

AI Technical Summary

Benefits of technology

[0005]The present invention is directed to dispensing packages suitable for dispensing cream or soft solid type antiperspirant compositions to one's underarm. In accordance with one exemplary embodiment, there has now been provided a dispensing package, comprising: (a) a container body comprising an interior chamber to contain an antiperspirant composition and an applicator surface; (b) an elevator including a cross section that is congruent to and mounted for axial movement within the chamber; and (c) an actuator system operatively connected to the elevator for advancing the elevator within the chamber to dispense a portion of the ant

Problems solved by technology

Weeping onto the applicator surface following a not mal dispensing and application event can however be an undesirable side effect of this type of dispensing package.

Residual pressure within the composition remaining in the package chamber can cause the composition to weep onto the applicator surface for a period of time.

Employing acetal to manufacture a one-piece turn wheel and feed screw is acceptable for typical antiperspirant actives, but unfortunately, acetal can be susceptible to acid degradation when certain high efficacy actives are used in the antiperspirant composition.

The high efficacy actives can produce a significant amount of hydrochloric acid (HCl) in the presence of water / moisture, and this acid can, in turn, degrade the screw to the point of inoperativeness.

However, in a one-piece design where the turn wheel and feed screw are manufactured from the same resin, the polypropylene would be unacceptable since it possesses too low of a flexural modulus to retract the feed screw and elevator sufficiently to relieve the internal pressure necessary to sufficiently limit or prevent weeping.

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