Electrostatic Skin Coating Film Adhesion
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Solution Overview
Problem
Existing electrostatic spraying methods for forming films on skin face challenges with film adhesion and stability, particularly in varying ambient environments such as humidity, leading to insufficient adhesion and peeling issues.
Innovation Solution
A method involving an electrostatic spray device that uses a liquid composition containing volatile substances like alcohols and ketones, combined with polymers, to form a film on the skin by applying a controlled high voltage, ensuring stable film formation and adhesion through Coulomb repulsion and solvent evaporation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrostatic spraying is performed using conventional methods, then film formation is achieved, but film adhesion is insufficient and peeling occurs in varying ambient environments
Solution Approach 1:
The patent applies parameter changes by carefully controlling the volatility rate of the solvent and the molecular weight of the polymer to optimize film formation under varying environmental conditions. By adjusting these parameters, the film achieves stable adhesion regardless of humidity or temperature changes.
Solution Approach 2:
The patent uses composite materials by combining specific polymers (polyvinyl butyral, polyvinyl alcohol, or carboxymethyl cellulose) with volatile solvents in optimized ratios. This composite composition ensures the film has both good adhesion and resistance to environmental variations.
2Productivity
If high voltage is applied for electrostatic spraying, then film formation speed increases, but film stability and adhesion deteriorate
Solution Approach 1:
The patent applies dynamics by using a power supply that can dynamically adjust voltage based on spray conditions. The system optimizes voltage in real-time to maintain both fast film formation and high film stability, avoiding the pitfalls of fixed high voltage application.
Solution Approach 2:
The patent implements feedback control through a voltage stabilizer that monitors and adjusts the applied voltage. This feedback mechanism ensures that voltage remains within an optimal range that balances film formation speed with film stability and adhesion.
3Ease of manufacture
If volatile substances are used in the liquid composition, then film formation is facilitated through evaporation, but film adhesion becomes insufficient
Solution Approach 1:
The patent applies parameter changes by selecting volatile substances with specific evaporation rates and controlling their concentration in the liquid composition. This optimization allows the film to form easily through evaporation while maintaining strong adhesion to the skin.
Solution Approach 2:
The patent uses composite materials by formulating a liquid composition that combines volatile solvents (alcohols or ketones) with specific polymers in optimized ratios. This composite formulation enables both easy film formation through evaporation and strong film adhesion.
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 achieves stable film formation on skin regardless of environmental conditions, with improved adhesion and resistance to external forces, ensuring a durable and effective film application.
Implementation Method 1
electrostatically spraying a liquid composition directly on a surface of skin
Implementation Method 2
ensuring stable film formation and adhesion through Coulomb repulsion
Implementation Method 3
a voltage stabilizer configured to stabilize the voltage applied by the power supply to the nozzle
Implementation Method 4
one or more volatile substances selected from alcohols and ketones
Data Source
Figure 1~2
Figure 3~4
AI summary
A method for producing a film of the present invention includes the step of electrostatically spraying a liquid composition directly on the surface of skin using an electrostatic spray device to form a film on the skin. The electrostatic spray device includes a container capable of storing the liquid composition, a nozzle configured to eject the liquid composition, a power supply configured to apply a voltage to the nozzle, and a voltage stabilizer configured to stabilize the voltage applied by the power supply to the nozzle. The liquid composition contains component (a): one or more volatile substances selected from alcohols and ketones, and component (b): a polymer having film formability