Dissolvable Bleach Sheet Stability via Segmented Film Layers
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Solution Overview
Problem
Existing bleach products, particularly in sheet form, face challenges in stabilizing bleach components during manufacturing, leading to instability and reduced effectiveness of the bleaching agent.
Innovation Solution
A dissolvable or dispersible bleach sheet is developed using a water dissolvable or water dispersible film, combined with bleaching agents, activators, and pH increasing agents. The bleaching agent can be in a granular form, coated to prevent premature activation, and incorporated between film layers to maintain stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the bleaching agent is incorporated into the sheet composition during manufacturing, then the sheet structure is formed, but the bleaching agent reacts with the sheet composition causing instability and reduced effectiveness
Solution Approach 1:
The sheet is divided into multiple layers: a water-soluble film layer and a bleaching agent layer. The bleaching agent is separated from the film-forming composition during manufacturing, preventing unwanted reactions while maintaining sheet structure. This segmentation resolves the contradiction by physically isolating the bleaching agent from the sheet composition.
Solution Approach 2:
The bleaching agent is extracted or removed from the aqueous solution before the sheet is formed. The sheet is manufactured without the bleaching agent, then the agent is applied separately to the dried or partially dried film. This extraction prevents the bleaching agent from reacting with the sheet composition during manufacturing, maintaining both stability and effectiveness.
2Stability of the object's composition
If the bleaching agent is kept in granular form and coated to prevent dissolution, then interaction with sheet composition is prevented, but the manufacturing process becomes more complex
Solution Approach 1:
The film-forming composition is processed and the sheet is formed first, before the bleaching agent is applied. This preliminary action of creating the sheet structure without the bleaching agent simplifies the manufacturing process compared to trying to incorporate granular bleaching agent during the initial mixing and casting stages.
Solution Approach 2:
The bleaching agent is applied locally to specific areas or layers of the sheet rather than being uniformly distributed throughout the entire composition. This localized application maintains stability while simplifying the manufacturing process by avoiding the need to handle and distribute granular material throughout the entire sheet matrix.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively delivers full bleaching power by preventing interaction between the bleaching agent and the sheet composition, ensuring stability and enhanced bleaching performance when added to water.
Implementation Method 1
a water dissolvable film or water dispersible film
Implementation Method 2
a water dissolvable film or water dispersible film
Implementation Method 3
leveraging the bleaching action of a bleaching agent
Data Source
AI summary
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.