Artificial Nail Roughened Adhesive Surface for Stronger Safe Removal
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Solution Overview
Problem
Conventional artificial nails using liquid adhesives for attachment to natural nails face issues with poor adhesive strength and require chemical removers that are harmful to the body, and alternative methods like double-sided tape offer inadequate adhesion.
Innovation Solution
The artificial nail design features a surface-treated lower surface with increased roughness and a guide line pattern for adhesive application, along with varying thickness edges, using a polymer material and a photo-curable adhesive member to enhance adhesion and safety of attachment and detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If liquid adhesive is applied to attach artificial nail to natural nail, then adhesive strength is improved, but harmful chemical factors increase and removal becomes difficult
Solution Approach 1:
The patent changes the physical state of the adhesive from liquid to gel form, and modifies the surface roughness parameter of the artificial nail lower surface to enhance adhesion. The gel adhesive with higher viscosity and the roughened surface (Ra: 0.8-1.5μm) work together to provide strong bonding without requiring harmful chemical removers, as the attachment can be mechanically separated when needed.
Solution Approach 2:
The patent employs a gel adhesive member that can be easily removed after use, allowing the artificial nail system to be disposable or easily replaceable. This eliminates the need for strong chemical removers and reduces cumulative exposure to harmful chemicals, as each application uses a fresh gel adhesive that can be cleanly removed.
2Object-affected harmful factors
If double-sided tape is used to attach artificial nail, then harmful chemical factors are reduced, but adhesive strength deteriorates
Solution Approach 1:
The patent transitions from using double-sided tape to a gel adhesive member with controlled viscosity (0.5-2.0 Pa·s) applied to a roughened surface. This parameter change in adhesive type and surface texture provides significantly enhanced adhesive strength while maintaining the benefit of reduced harmful chemicals, as the gel formulation can be made non-toxic and easily removable.
Solution Approach 2:
The lower surface of the artificial nail is treated to have a specific roughness (Ra: 0.8-1.5μm) that creates a porous-like surface structure. This increased surface area and mechanical interlocking capability enhance the adhesive strength of the gel adhesive member, providing bonding strength superior to double-sided tape while avoiding the chemical hazards of conventional liquid adhesives.
3Strength
If liquid adhesive is used for attachment, then adhesive strength is improved, but ease of operation for removal deteriorates
Solution Approach 1:
The gel adhesive member is designed to be easily removable after its service life, allowing the artificial nail to be taken off without difficult chemical processes. The gel formulation provides strong initial bonding but can be cleanly removed with gentle solvents or mechanical separation, making the removal process simple and safe compared to conventional liquid adhesive systems.
Solution Approach 2:
The patent uses a gel adhesive with higher viscosity (0.5-2.0 Pa·s) that provides strong adhesion during wear but allows for easy removal. The gel's physical properties enable it to maintain strong bonding under normal conditions while permitting controlled removal when needed, unlike liquid adhesives that require harsh chemical removers.
4Strength
If surface treatment is applied to increase roughness, then adhesive strength is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies a controlled surface roughness range (Ra: 0.8-1.5μm) for the lower surface of the artificial nail. This parameter specification balances the need for enhanced adhesive strength with manufacturability, providing a clear target for production while ensuring consistent bonding performance across batches.
Solution Approach 2:
The surface treatment is applied specifically to the lower surface of the artificial nail where adhesion is needed, while other surfaces maintain their original smooth finish. This localized treatment approach ensures that manufacturing precision is focused only on the adhesive interface area, reducing overall manufacturing complexity while achieving the desired bonding enhancement.
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 enhanced adhesive strength and optimized adhesive application improve the stability and safety of artificial nail attachment to natural nails, reducing reliance on harmful chemicals and facilitating easy removal.
Implementation Method 1
using a polymer material and a photo-curable adhesive member to enhance adhesion and safety of attachment and detachment
Data Source
AI summary
An artificial nail includes: an artificial nail body having a shape corresponding to a shape of at least one portion of the natural nail, and including an upper surface provided to be away from a surface of the natural nail and a lower surface structured to face the surface of the natural nail; and an adhesive member disposed on a first surface of the lower surface of the artificial nail body. The lower surface of the artificial nail body includes the first surface overlapping the natural nail when attached to the surface of the natural nail and a second surface other than the first surface, and at least one portion of the first surface has a first roughness greater than a roughness of the second surface.