Wet wipe having a stratified wetting composition therein and process for preparing same
First Claim
1. A wet wipe having a stratified wetting composition therein, the wipe comprising:
- a fibrous substrate having a front surface region and a back surface region generally parallel thereto, and a bulk region between said front surface region and back surface region; and
,a wetting composition in contact with the fibrous substrate, the wetting composition comprising an oil phase and an aqueous phase, wherein a concentration of one or more oil phase components is greater in the front and/or back surface regions of the substrate than a concentration of the same component, or components, in the bulk region of the substrate, and further wherein a concentration of one or more aqueous phase components is greater in the bulk region of the substrate than a concentration of the same component, or components, in the front and back surface regions of the substrate.
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Accused Products
Abstract
The present invention generally relates to a wet wipe or sheet that is suitable for contacting the skin and that has a stratified wetting composition therein. More specifically, the present invention related to a wet wipe, which may optionally be an ion-triggerable, water-disintegratable wipe, wherein the organic phase, and more particularly one or more components of the organic phase, of the wetting composition is concentrated near the surface of the wipe, and the aqueous phase of the wetting composition is concentrated in the bulk of the wipe. The present invention is further directed to a number of processes for preparing such a wet wipe. For example, in one embodiment an emulsified wetting composition is applied to a fibrous substrate of the wet wipe, and then treated to destabilize the emulsion. In an alternative embodiment, an emulsified wetting composition may be destabilized prior to it being applied to the fibrous substrate. As a result of the destabilization, the emulsion undergoes phase separation after being applied to the fibrous substrate.
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Citations
20 Claims
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1. A wet wipe having a stratified wetting composition therein, the wipe comprising:
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a fibrous substrate having a front surface region and a back surface region generally parallel thereto, and a bulk region between said front surface region and back surface region; and
,a wetting composition in contact with the fibrous substrate, the wetting composition comprising an oil phase and an aqueous phase, wherein a concentration of one or more oil phase components is greater in the front and/or back surface regions of the substrate than a concentration of the same component, or components, in the bulk region of the substrate, and further wherein a concentration of one or more aqueous phase components is greater in the bulk region of the substrate than a concentration of the same component, or components, in the front and back surface regions of the substrate. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A process for preparing a wet wipe comprising a stratified wetting composition therein, the process comprising:
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applying an oil-in-water emulsified wetting composition to a fibrous substrate of the wipe, the fibrous substrate having a front surface region and a back surface region generally parallel thereto, and a bulk region between said front surface region and back surface region; and
,treating the wetted fibrous substrate to destabilize the wetting composition and cause phase separation of the wetting composition to occur within the fibrous substrate, wherein after said phase separation, a concentration of one or more oil phase components is greater in the front and back surface regions of the substrate than a concentration of the same component, or components, in the bulk region of the substrate, and further wherein a concentration of one or more aqueous phase components is greater in the bulk region of the substrate than a concentration of the same component, or components, in the front and back surface regions of the substrate. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A processes for preparing a wet wipe comprising a stratified wetting composition therein, the process comprising:
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forming an unstable, emulsified wetting composition by diluting a stable, concentrated, emulsified wetting composition with an aqueous solution comprising a salt, an acid or a base; applying the unstable, emulsified wetting composition to a fibrous substrate of the wipe before phase separation within the emulsified wetting composition occurs, the fibrous substrate having a front surface region and a back surface region generally parallel thereto, and a bulk region between said front surface region and back surface region; and
,allowing phase separation of the wetting composition to occur within the wetted fibrous substrate, wherein after said phase separation, a concentration of one or more oil phase components is greater in the front and back surface regions of the substrate than a concentration of the same component, or components, in the bulk region of the substrate, and further wherein a concentration of one or more aqueous phase components is greater in the bulk region of the substrate than a concentration of the same component, or components, in the front and back surface regions of the substrate. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification