Multilayer Dissolvable Sheets With Particle Coating for Leak-Safe Sealing
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Solution Overview
Problem
Challenges exist in creating multi-layer dissolvable sheets with solid particles, particularly bleaching agents, due to sealing issues and potential powder leakage, which affect the integrity and functionality of the product.
Innovation Solution
A coating composition comprising a non-aqueous liquid carrier, a thickening agent, and solid particles is applied on the surfaces of adjacent layers of flexible, porous dissolvable sheets to enhance stability and sealing, using a non-aqueous liquid carrier, a thickening agent, and solid particles, with specific compositions for different layers to improve stability and loading capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If solid particles are incorporated between layers of foam sheets, then the loading capability and functionality are improved, but sealing issues occur and powder leakage is caused
Solution Approach 1:
A liquid coating is applied as an intermediary layer between the foam sheets and solid particles. This coating acts as a bonding medium that adheres the particles to the sheets while creating a continuous sealing layer that prevents powder leakage, thus resolving the contradiction between loading capability and sealing integrity
Solution Approach 2:
The invention changes the physical state of the coating from solid particle form to liquid coating form. This parameter change allows the coating to flow and conform to the sheet surfaces, creating proper sealing and bonding while still allowing the solid particles to be incorporated and loaded between the layers
2Quantity of substance
If solid particles are used as coating composition, then the active ingredient delivery is improved, but phase separation and aggregation occur
Solution Approach 1:
The liquid coating serves as an intermediary carrier that disperses solid particles uniformly throughout the coating matrix. This prevents direct contact and aggregation between particles while maintaining their active ingredient delivery function, thus improving both active ingredient delivery and coating stability
Solution Approach 2:
The invention changes the physical state of the coating composition from a potential solid mixture to a liquid coating. This parameter change allows for uniform dispersion of solid particles within the liquid matrix, preventing phase separation and aggregation while maintaining the stability and functionality of the active ingredients
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 provides improved stability of moisture-sensitive active ingredients, reduced leakage, and enhanced loading capability, allowing for effective delivery of bleaching agents and antimicrobial effects.
Implementation Method 1
a coating composition comprising a non-aqueous liquid carrier, a thickening agent, and solid particles is applied on one or both contacting surfaces of adjacent layers of the multilayer flexible, dissolvable, porous sheets
Implementation Method 2
the coating composition can comprise a nonionic surfactant as a non-aqueous liquid carrier, a thickening agent, and solid particles
Data Source
AI summary
A dissolvable solid article which can include multiple layers of flexible, dissolvable, porous sheets, in which a coating composition including solid particles is present on at least one internal surface of at least one sheet in said solid articles and a process for making such solid articles.