CONTROL OF FLUID MIGRATION IN NON-LATEX BONDED WET-WIPES
The present invention describes wet-wipe composition with a liquid portion that is impregnated in a substrate, wherein the liquid portion contains a thickening or gelling polymer along with a thickening or gelling agent which substantially reduces fluid migration of the liquid portion within a wet-wipes stack during storage wherein the thickening or gelling agent is incorporated into the substrate through means of physical entanglement or thermal bonding.
1 . A wet-wipe having improved fluid migration properties comprising:
a thickening or gelling polymer;
an effective amount of a thickening or gelling agent which is capable of thickening or gelling the thickening or gelling polymer;
a substrate of woven, nonwoven or knitted fabric; and
a liquid portion comprising an aqueous phase,
wherein the thickening or gelling agent is incorporated into the substrate through means of physical entanglement or thermal bonding.
2 . The wet-wipe of claim 1 wherein the thickening or gelling polymer and the thickening or gelling agent comprise a binary pair wherein the binary pair is selected from the group consisting of: sodium alginate and Ca 2+ containing salts;
carboxymethylcellulose and Al 3+ containing salts; guar gum/guar gum derivatives (such as HP-guar (hydroxypropyl guar), HE-guar (hydroxyethyl guar), CM-guar (carboxymethyl guar), M-guar (methylguar), HPM-guar (hydroxypropylmethyl guar), cationic guar, cationic HM guar (cationic hydrophobically modified guar), anionic HM guar (anionic hydrophobically modified guar), and HM guar (hydrophobically modified guar)) and borax; pectin gum and Ca 2+ containing salts;
carrageenan gum and K + containing salts; cross linked polyacrylic acid and neutralizing base solution; xanthan gum, guar gum, and gellan gum and divalent cations; ionic polymer or surfactant having a charge and polymer or surfactant with an opposite charge and any combination of binary pairs.
3 . The wet-wipe of claim 1 wherein the thickening or gelling polymer comprises between about 0.05 to about 5 wt % of the liquid portion of the aqueous phase.
4 . The wet-wipe of claim 3 wherein the thickening or gelling polymer comprises between about 0.10 to about 2 wt % of the liquid portion of the aqueous phase.
5 . The wet-wipe of claim 2 wherein the thickening or gelling polymer comprises sodium alginate and the thickening or gelling agent comprises Ca 2+ containing salts.
6 . The wet-wipe of claim 1 , wherein the liquid portion further comprises at least one of the ingredients selected from the group consisting of water, emollients, surfactants, fragrances, preservatives, chelating agents, pH buffers, emulsifiers, water thickeners, oil thickeners, stabilizers, and suspending agents.
7 . The wet-wipe of claim 1 , wherein the liquid portion further comprises a benefiting agent selected from the group consisting of oil and fat and their derivative, humectants, conditioning agent, soothing agent, healing agent, insect repellent agent, deodorizing agent, biocide, lubricant, softening agent, luminance, vitamins, moisturizer, softening cleaning agent, cleansing agent, fragrance, color, antistatic agent, static agent, and mixtures thereof.
8 . The wet-wipe of claim 1 , wherein the wet-wipe is a personal care wipe.
9 . The wet-wipe of claim 1 , wherein the wet-wipe is a household care wipe.
10 . A method for producing a wet-wipe comprising the steps of:
a) obtaining a substrate containing an effective amount of a thickening or gelling agent; and
b) applying to the substrate a liquid portion comprising an aqueous phase and a thickening or gelling polymer;
wherein the thickening or gelling agent is incorporated into the substrate through means of physical entanglement or thermal bonding.
11 . The method for producing a wet-wipe of claim 10 wherein the liquid portion comprising the aqueous phase and the thickening or gelling polymer is applied to the substrate using a dip tank, sprays or transfer roller.