Water soluble sheet composition
View Patent ↗The present invention is a composition in the form of a soluble sheet or film which has a variety of uses, particularly in the personal care field. Such sheets are preferably water soluble. An important component of these water soluble sheets is a “base composition,” which includes a water soluble film forming polymer, a polyvinyl alcohol, and a humectant such as propylene glycol. Surfactant may be added to the liquid base composition so that, when the composition is dried into sheet form, the sheet will generate foam when exposed to water and have cleansing properties. Skin care ingredients may also be added to the base composition in addition to or in place of the surfactant. Volatile alcohols or hydrocarbons may also be incorporated into the liquid base composition to facilitate drying of the composition to form the flexible sheet product.
1. A water soluble sheet formed from a composition comprising;
a water soluble polymer,
a polyvinyl alcohol,
a humectant,
at least one of sodium laureth sulfate and ammonium laureth sulfate, and,
a surfactant, wherein the surfactant is one of,
cationic surfactants, nonionic surfactants, amphoteric surfactants, and mixtures thereof, and when a nonionic surfactant is selected, the composition further comprises at least one other non-nonionic surfactant.
2. The composition of claim 1 wherein said water soluble polymer comprises PVP.
3. The composition of claim 1 wherein said water soluble polymer comprises 2-pyrrolidone, 1-ethenyl-homopolymer.
4. The composition of claim 1 wherein said humectant comprises propylene glycol.
5. The composition of claim 1 wherein said polyvinyl alcohol has a hydrolysis from about 87% to about 90%.
6. The composition of claim 1 further comprising skin feel ingredients up to about 50 weight percent.
7. The composition of claim 1 wherein said surfactant further comprises an anionic surfactant.
8. The composition of claim 7 wherein said anionic surfactant comprises water soluble soap.
9. A water soluble sheet for use in the nersonal care field formed from a composition comprising;
a water soluble polymer,
a polyvinyl alcohol,
a humectant,
at least one of sodium laureth sulfate and ammonium laureth sulfate,
a non-ionic surfactant, and
one other a surfactant other than a non-ionic surfactant and other than an anionic surfactant.
10. The composition of claim 9 wherein said water soluble polymer comprises PVP.
11. The composition of claim 9 wherein said water soluble polymer comprises 2-pyrrolidone, 1-ethenyl-homopolymer.
12. The composition of claim 9 wherein said humectant comprises propylene glycol.
13. The composition of claim 9 wherein said polyvinyl alcohol has a hydrolysis from about 87% to about 90%.
14. The composition of claim 9 further comprising skin feel ingredients up to about 50 weight percent.
15. The composition of claim 9 wherein said surfactant further comprises an anionic surfactant.
16. The composition of claim 15 wherein said anionic surfactant comprises water soluble soap.
17. The composition of claim 1 wherein the combined weight of said surfactants is less than about 65percent by weight of the composition.
18. The composition of claim 9 wherein the combined weight of said surfactants is less than 65percent by weight of the composition.