Dry Wipe Microcapsule Surfactant Release Mechanism
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Solution Overview
Problem
Existing skin care wipes often dry out due to improper sealing, making them unusable at the time of use, necessitating hermetically sealed packaging to maintain humidity.
Innovation Solution
Development of dry wipes with microcapsules containing cosmetic active principles and surfactants applied on a nonwoven absorbent cotton fabric, which release the active principle when water is applied, forming an oil-in-water emulsion for skin application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wet wipes are packaged in hermetically sealed packages to prevent evaporation, then the humidity is maintained for use over time, but the packaging complexity and sealing reliability issues arise
Solution Approach 1:
The invention extracts the liquid phase and active principle from the wipe structure, replacing them with microcapsules containing the active principle and a small amount of surfactant. This eliminates the need for hermetic sealing to prevent evaporation, as the microcapsules are solid and stable at ambient conditions.
Solution Approach 2:
The invention changes the physical state of the active principle from dissolved in liquid to encapsulated in solid microcapsules. This parameter change allows the wipe to be stored dry without sealing, while still delivering the active principle when water is applied during use.
2Ease of operation
If wet wipes are used with liquid phase active principle, then the active principle can be applied on skin, but the wipes dry out and become unusable due to improper sealing
Solution Approach 1:
The liquid phase is extracted from the wipe system and replaced with solid microcapsules. This eliminates the drying out problem while maintaining ease of use, as the microcapsules release their contents when water is applied during normal use.
Solution Approach 2:
The invention creates a disposable dry wipe that is stable during storage and activates upon use. Each wipe is designed to be used once, eliminating the need for long-term humidity maintenance and complex reclosing mechanisms.
3Device complexity
If microcapsules containing active principle are applied on dry wipe surface, then hermetically sealed packaging is not needed, but the active principle must be released effectively when water is applied
Solution Approach 1:
The invention introduces surfactant as an intermediary substance that facilitates the release of the active principle from microcapsules when water is applied. The surfactant acts as a mediator between the lipophilic active principle and the aqueous environment, ensuring effective release without complex packaging.
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 dry wipe system allows for effective application of cosmetic active principles without the need for hermetically sealed packaging, ensuring the active principles remain functional and usable over time.
Implementation Method 1
forming an oil-in-water emulsion for skin application
Implementation Method 2
wherein the wipe contains at least one surfactant
Data Source
AI summary
Dry wipe for application of at least one active principle on the skin, including: an inert laminar support; a plurality of microcapsules applied to the inert laminar support, the microcapsules containing at least one active principle; at least one surfactant applied to the inert laminar support.