Nanofiber Laminate Sheet Differential Solubility Handling
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Solution Overview
Problem
Nanofiber sheets prepared from water-soluble polymers are highly soluble and prone to dissolving upon contact with water, making them difficult to handle and attach to objects.
Innovation Solution
A nanofiber laminate sheet is created with a layer of nanofibers containing cosmetic or medicinal components and a water-soluble base layer on at least one side, where the base layer is less water-soluble than the nanofiber layer, allowing for improved handling and attachment by controlling the dissolving time ratio between the two layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a nanofiber sheet is prepared from a water soluble polymer to achieve high water solubility and easy dissolution, then the nanofiber dissolves easily with water, but the nanofiber sheet becomes difficult to handle and may dissolve or get holes before attachment
Solution Approach 1:
The sheet is divided into two functional layers: a nanofiber layer containing cosmetic/medicinal components and a water-soluble base layer. The base layer acts as a support structure that dissolves slower than the nanofiber layer, preventing premature dissolution and handling issues while the nanofiber layer maintains high solubility for effective ingredient release.
Solution Approach 2:
Different regions of the sheet have different water solubility characteristics. The nanofiber layer is designed to be highly water-soluble for ingredient release, while the base layer is designed to be less water-soluble to provide structural integrity during handling and attachment, creating local quality differences that resolve the contradiction.
2Productivity
If the nanofiber layer dissolves quickly to release cosmetic or medicinal components, then the active ingredients are effectively imparted to the object, but the base layer may dissolve too quickly causing waste or structural failure
Solution Approach 1:
The base layer is pre-designed with controlled dissolution characteristics that are slower than the nanofiber layer. This preliminary structural design ensures that the base layer maintains integrity long enough to support the rapid dissolution and ingredient release from the nanofiber layer, preventing structural failure and waste.
Solution Approach 2:
The sheet combines two materials with different dissolution rates: a highly water-soluble nanofiber material containing active ingredients and a less water-soluble base material. This composite structure allows the nanofiber layer to dissolve quickly and release ingredients while the base layer dissolves slower to maintain structural integrity.
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 laminate sheet is easier to handle and attach to surfaces, with the nanofiber layer dissolving before the base layer, ensuring the active ingredients are effectively imparted to the object while the base layer slowly releases the components over time, preventing waste.
Implementation Method 1
A nanofiber laminate sheet comprising a nanofiber layer containing a cosmetic component or a medicinal component and a water soluble base layer located on at least one side of the nanofiber layer
Implementation Method 2
the water soluble base layer being less water-soluble than the nanofiber layer
Data Source
Figure 1~2(c)
Figure 3~4
Figure 5
AI summary
A nanofiber laminate sheet including a nanofiber layer containing a cosmetic component or a medicinal component and a water soluble base layer located on at least one side of the nanofiber layer. The water soluble base layer is less water-soluble than the nanofiber layer. The water soluble base layer is preferably constructed of nanofiber portions mingled with filmy portions. The water soluble base layer is preferably a layer of nanofibers in which nanofibers cohere to each other to form the filmy portions at their intersections.