Dissolvable and dispersable bleach sheet
AssigneeSheets Laundry Club Inc.
InventorMARIO TREMBLAY
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Abstract
The described invention is a bleach sheet made of a dissolvable film forming polymer such as PVA, or a dispersible film forming polymer such as cellulose-based film, and combined with a bleaching agent and a manufacturing method thereof. Once the sheet is added to water, it then dissolves or disperses completely in water. The ingredients that are mixed to form the dissolvable or dispersible sheet produce a liquid that can be converted into a solid and then a flexible sheet once it is dry and may be used as a bleach.
Claims24
A bleach composition in the form of a drum-dried water soluble sheet, comprising:
- a water dissolvable polymer film having a bleaching agent, a bleach activator, a pH modifier, and water 1-5% by weight, wherein the polymer is 10-20% by weight selected from the group consisting of polyvinyl alcohol, starch, and hydroxypropylcellulose, wherein the bleaching agent is 1-60% by weight, wherein the bleach activator is 1-40% by weight, wherein the pH modifier is 1-70% by weight, wherein all percentages total 100.
and a combination thereof.
A method for producing a water dissolvable bleach sheet, the steps comprising:
- (i) dissolving polyvinyl alcohol in water to form an aqueous PVA solution;
- (ii) mixing a bleaching agent, a bleach activator, a pH modifier to the aqueous PVA solution, and optionally one or more of a surfactant, a builder, a binding agent, and a chelating agent to form a paste;
- (iii) delivering the paste to a drum dryer to form a water dissolvable bleach sheet.
Dependencies are inferred from the claim text.