Memory Film Composition for Moist-Skin Attachment and Consistent Contraction
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Solution Overview
Problem
Conventional skin films require manual stretching and applicators for attachment, lose attachment in moist environments, and lack consistent contraction force.
Innovation Solution
A memory film composed of acrylic acid and polyurethane layers that contracts with a memorized force when attached to moist skin, maintaining an elongated state during stretching and drying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional films are attached to the skin, then initial attachment is achieved, but attachment ability is lost in moist environments
Solution Approach 1:
The patent changes the chemical composition parameters of the film by incorporating hydrophobic materials and specific polymer ratios to resist moisture while maintaining elasticity. This allows the film to maintain attachment ability in moist environments without losing its functional properties.
Solution Approach 2:
The patent uses composite materials combining hydrophobic polymers, elastic components, and adhesive agents to create a film that simultaneously achieves moisture resistance, elasticity, and skin attachment. This composite structure resolves the contradiction between attachment ability and moisture resistance.
2Ease of operation
If manual stretching and applicators are used for attachment, then initial attachment can be achieved, but consistent contraction force cannot be delivered
Solution Approach 1:
The film is designed to automatically contract and adhere to the skin without requiring manual stretching or applicators. The pre-stretched film structure inherently provides consistent contraction force, eliminating the need for manual intervention and ensuring uniform force delivery throughout the treatment area.
Solution Approach 2:
The film is pre-stretched and pre-formed with memorized contraction characteristics before application. This preliminary preparation allows the film to deliver consistent contraction force automatically upon application, without requiring manual stretching or adjustment during use.
3Ease of operation
If the film is stretched during application, then attachment to skin is achieved, but the film loses its memorized contraction state
Solution Approach 1:
The patent designs the film with dynamic properties that allow temporary deformation during application followed by automatic recovery. The elastic components enable the film to be stretched during application but then spontaneously return to its memorized contracted state, maintaining both ease of application and compositional stability.
Solution Approach 2:
The film structure incorporates elastic components that act as a cushion, allowing temporary stretching during application while preserving the memorized contraction state. This elastic cushioning enables the film to absorb application stresses without permanently altering its contraction memory.
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 film enhances skin elasticity, reduces wrinkle depth and area, and improves skin density, with noticeable effects within days of use and maintaining improvements up to 21 days after removal.
Implementation Method 1
a memory film that includes a first layer including acrylic acid and polyurethane, which is attached to the skin and then contracts to a memorized rate after a period of time
Implementation Method 2
the film exhibits excellent mechanical properties and elasticity, maintains an elongated state during stretching and drying
Data Source
AI summary
The present specification relates to a memory film that not only has excellent mechanical properties but also outstanding elasticity, maintains an elongated state during stretching and drying, and contracts the skin with its pre-memorized contractile force when attached to moist skin, and has the effect of enhancing skin elasticity, improving skin wrinkles, increasing skin density, and reducing pore depth, pore area, pore count, and pore volume.