Multi-layer substrate for a premoistened wipe capable of controlled fluid release
AssigneeThe Procter & Gamble Company
InventorsArthur Wong, Jeffrey Lawrence Flora
Life of this patent
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Abstract
Multi-layer substrates for a premoistened wipe capable of controlled fluid release comprise a reservoir layer and a surface contact layer, wherein the reservoir and surface contact layers have certain blends of hydrophilic and hydrophobic fibers, as well as certain basis weights. Premoistened wipes for treating and/or cleaning a surface comprise the multi-layer substrate and a liquid composition impregnated into the multi-layer substrate, wherein the liquid composition comprises a surfactant system and/or a solvent system. Methods of treating and/or cleaning a surface comprise the step of contacting the surface with a premoistened wipe of the present invention.
Claims16
A multi-layer substrate having a surface area, said substrate being suitable for incorporation in a premoistened wipe for cleaning surfaces, said substrate comprising:
- (a) at least one reservoir layer, wherein a first reservoir layer has a basis weight of at least about 15 gsm and comprises:
- (i) from at least about 5% to less than about 50%, by weight of said first reservoir layer, of carded hydrophilic polypropylene fibers and mixtures thereof with other carded hydrophilic fibers;
- and
- (ii) from at least about 50% to less than about 95% by weight of said first reservoir layer, of carded hydrophobic fibers;
- wherein the total basis weight of said reservoir layer(s) is from about 10% to about 95% of the total basis weight of said multi-layer substrate;
- and
- (b) at least one surface contacting layer;
- wherein a first surface contacting layer has a basis weight of at least about 5 gsm and comprises:
- (i) from at least about 20% to less than about 50%, by weight of said first surface contacting layer, of carded hydrophilic polypropylene fibers and mixtures thereof with other carded hydrophilic fibers;
- and
- (ii) from at least about 50% to less than about 80%, by weight of said first surface contacting layer, of carded hydrophobic fibers;
- wherein the total basis weight of said surface contacting layer(s) is from at least about 10% to less than about 60% of the total basis weight of said multi-layer substrate, and wherein said layers (a) and (b) are bonded to one another via patterned thermal bonding having about 1–40 bonds/cm2 covering from about 5% to about 30% of the substrate's surface area.
Dependencies are inferred from the claim text.