Transparent Nanofiber Skin Coating With Oil-Mediated Adhesion
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Solution Overview
Problem
Conventional cosmetic nanofiber sheets face issues with holding a large amount of cosmetic components, adhesion to the skin, and maintaining transparency, as they tend to deteriorate and do not effectively utilize the skin's color for a transparent coating.
Innovation Solution
A method involving the application of a sheet transparentizing agent containing hydrocarbon oil, ester oil, or higher alcohol to the skin, followed by transferring a white nanofiber sheet composed of a water-insoluble polymer, which improves adhesivity and maintains transparency by optimizing the oil agent content and void volume ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a nanofiber sheet is applied directly to the skin, then the sheet structure is maintained, but adhesion to skin is insufficient and transparency is not achieved
Solution Approach 1:
The patent applies a sheet transparentizing agent containing oil components to the skin before transferring the nanofiber sheet. This preliminary action prepares the skin surface to enhance both adhesion and transparency of the final coating, resolving the contradiction by creating optimal conditions in advance.
Solution Approach 2:
The sheet transparentizing agent acts as an intermediary substance between the nanofiber sheet and the skin. It facilitates both adhesion and transparency by modifying the skin surface properties, allowing the nanofiber sheet to adhere properly while maintaining optical clarity.
2Quantity of substance
If cosmetic components are mixed into the polymer solution for electrospinning, then the sheet can hold cosmetic components, but the sheet structure deteriorates
Solution Approach 1:
The patent separates the cosmetic component delivery function from the sheet structure function. The nanofiber sheet provides structural stability while the sheet transparentizing agent containing oil components delivers cosmetic benefits, avoiding structural deterioration from mixing cosmetics into the polymer solution.
Solution Approach 2:
The patent extracts the cosmetic component delivery function into a separate sheet transparentizing agent applied before the nanofiber sheet. This extraction prevents the cosmetic components from interfering with the nanofiber sheet structure while still achieving cosmetic delivery through the oil-containing agent.
3Quantity of substance
If a colored pigment is contained in the nanofiber sheet, then cosmetic effect is achieved, but adhesion to skin deteriorates
Solution Approach 1:
The sheet transparentizing agent is applied to the skin before transferring the nanofiber sheet containing colored pigment. This preliminary action ensures proper adhesion is established first, allowing the pigment-containing sheet to adhere effectively while maintaining cosmetic effects.
Solution Approach 2:
The sheet transparentizing agent serves as an intermediary that enhances adhesion between the pigment-containing nanofiber sheet and the skin. It mediates the interaction to ensure both cosmetic pigment delivery and reliable adhesion are achieved simultaneously.
4Strength
If the nanofiber sheet thickness is increased to improve durability, then structural strength is improved, but transparency is reduced
Solution Approach 1:
The patent optimizes the nanofiber sheet thickness parameter to balance structural strength and transparency. By controlling the thickness within specific ranges and adjusting fiber diameter parameters, the sheet achieves sufficient durability while maintaining optical transparency for skin color utilization.
Solution Approach 2:
The patent creates a composite system combining the nanofiber sheet with the sheet transparentizing agent. This composite approach allows the nanofiber sheet to provide structural strength while the transparentizing agent enhances optical properties, achieving both durability and transparency.
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 method significantly enhances the adhesivity and transparency of the nanofiber sheet coating, ensuring it remains adherent and visible on the skin.
Implementation Method 1
when the volume occupied by the oil agent is V 1 and the void volume of the nanofiber sheet is V 2 , (V 1/ V 2 ) is 0.1 or more
Data Source
Figure 1~2
AI summary
To provide a method for forming a transparent coating that is highly adherent to the skin and through which the skin is visible. A method for forming a coating on a skin surface using a nanofiber sheet, the method comprising: (1) Step (1) of applying to the skin a sheet transparentizing agent comprising 2 mass% or more of one or more oil agents; and (2) Step (2) of transferring a white nanofiber sheet mainly composed of a water-insoluble polymer to the skin after Step (1).