Bicomponent material
AssigneeThe Procter & Gamble Company
InventorsLeslie D. Ryan, Mark J. Steinhardt, Milton D. Spahni, James C. Baird
Life of this patent
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Abstract
A bicomponent material which allows liquids to pass in a first direction, but substantially prevents the liquids from passing in the opposite direction, is disclosed. The material also exposes any gases attempting to pass in the direction opposite to that of the liquid transmission to an odor control lamina. The material is especially suitable for use with articles which deal with bodily fluids and the gases generated therefrom.
Claims38
A bicomponent film laminate which transmits liquids deposited thereon in one direction and which exposes an active to malodors attempting to pass through said laminate in the opposite direction, said laminate comprising:
- (a) a first polymeric lamina exhibiting a pattern of discrete apertures therein, said first lamina having an exterior face and an interior face opposed thereto;
- and
- (b) a second active lamina comprising an odor control means, said second lamina having a first face adjacent said interior face of said polymeric lamina and a second face opposed thereto, said second lamina also exhibiting a pattern of discrete apertures substantially coinciding with said discrete apertures of said first lamina, whereby said laminate includes means for permitting liquids deposited on the exterior face of said first lamina to pass through said discrete apertures in said laminate without substantially wetting said second lamina, said laminate also including means for substantially preventing gaseous malodors from passing through said laminate in a direction opposite to the direction of liquid transmission without substantial exposure of the gaseous malodors to said second face of said second lamina.
A laminate according to claim wherein said second lamina is applied to said first lamina by means selected from the group consisting of brushing, spraying and drawing said first lamina through a fluidized bed of said second lamina.
A laminate according to claim wherein said first lamina is selected from the group consisting of formed film and nonwoven materials.
A disposable absorbent article for collecting liquids discharged from a source and substantially containing malodors generated by the collected liquids, said article comprising:
- (a) an absorbent core means for absorbing liquids, said core mean shaving a first face and a second face opposed thereto;
- (b) a liquid impermeable backsheet overlaying said first opposed face of said absorbent core means;
- and
- (c) a bicomponent film laminate topsheet overlaying said second opposed face of said core means and comprising a first polymeric lamina exhibiting a pattern of discrete apertures therein, said first lamina having an exterior face and an interior face opposed thereto;
- said laminate further comprising a second active lamina comprising an odor control means, said second lamina having a first face adjacent said interior face of said first lamina and a second face opposed thereto, said second face of said second lamina being directionally oriented toward said core means, said second lamina also exhibiting a pattern of discrete apertures substantially coinciding with said discrete apertures of said first lamina, whereby said laminate includes means for permitting liquids deposited on said exterior face of said first lamina to pass through said discrete apertures in said laminate to said core means without substantially wetting said second lamina said laminate also including means for substantially preventing gaseous malodors generated by the absorbed liquids from passing through said laminate in a direction opposite to the direction of transmission of deposited liquids without substantial exposure of the gaseous malodors to said second face of said second lamina.
A disposable absorbent article for collecting liquids discharged from a source and substantially containing malodors generated by the collected liquids, said article comprising:
- (a) an absorbent core means for absorbing liquids, said core means having a first face and a second face opposed thereto;
- (b) a liquid impermeable backsheet overlaying said first face of said absorbent core means;
- (c) a liquid permeable topsheet overlaying said second opposed face of said core means;
- and
- (d) at least one tube disposed between said backsheet and said topsheet, said tube having a first lamina comprised of polymeric film exhibiting a multiplicity of apertures, each circumscribed by an outwardly oriented cone adapted to resist the entry of liquids deposited thereon into said tube and to permit the entry of gaseous malodors into said tube, said tube further having a second lamina comprising an active agent located on its interior surface, said second lamina being adapted to substantially prevent gaseous malodors which enter said tube from exiting said tube without substantial exposure of the gaseous malodors to said active agent.
A disposable absorbent article for collecting liquids discharged from a source and substantially containing malodors generated by the collected liquids, said article comprising:
- (a) an absorbent core means for absorbing liquids, said core means having a first face and a second face opposed thereto;
- (b) a liquid impermeable backsheet overlaying said first opposed face of said core means;
- (c) a liquid permeable topsheet overlaying said second opposed face of said core means;
- and
- (d) a bicomponent film laminate disposed between said topsheet and said backsheet, said laminate comprising a first polymeric lamina exhibiting a pattern of discrete apertures therein, said first lamina having an exterior face and an interior face opposed thereto;
- said laminate further comprising a second active lamina comprising an odor control means, said second lamina having a first face adjacent said interior face of said first lamina and a second face opposed thereto, said second face of said second lamina being directionally oriented toward said core means, said second lamina also exhibiting a pattern of discrete apertures substantially coinciding with said discrete apertures of said first lamina, whereby said laminate includes means for permitting liquids deposited on said exterior face of said first lamina to pass through said discrete apertures in said laminate to said core means without substantially wetting said second lamina, said laminate also including means substantially preventing gaseous malodors generated by the absorbed liquids from passing through said laminate in a direction opposite to the direction of transmission of deposited liquids without substantial exposure of the gaseous malodors to said second face of said second lamina.
Dependencies are inferred from the claim text.