UV-Cured Resin Composition for Artificial Nails with Curved Edges
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Solution Overview
Problem
Conventional gel nails have vertically cut edges that are prone to scratching and lack realism, and existing nail cosmetic materials pose health risks due to organic solvents.
Innovation Solution
A resin composition comprising an ester-based prepolymer, reactive diluent, and photoinitiator is used to create an adhesive-dropping and adhesive-pressing material for artificial nails, which are cured with UV light, providing a natural arc shape and smooth edges, and are free from organic solvents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional gel nails are used, then curing time is short and thick coating is achievable, but the edge is vertically cut and prone to scratching
Solution Approach 1:
The patent applies curvature by forming the nail tip into a rounded shape instead of a vertically cut edge. The nail tip is designed with a curved surface that gradually transitions from the nail body, eliminating sharp edges that are prone to scratching. This curved geometry provides both aesthetic realism and functional durability by distributing stress more evenly across the tip surface.
2Ease of manufacture
If conventional nail cosmetic materials with organic solvents are used, then coating can be applied, but health damage occurs due to solvent inhalation and skin absorption
Solution Approach 1:
The patent changes the chemical composition parameters by completely replacing organic solvent-based systems with a water-based system. The coating material uses water as the dispersion medium instead of volatile organic solvents, and employs water-soluble or water-dispersible polymers and pigments. This parameter change eliminates the harmful effects of solvent inhalation and skin absorption while maintaining coating application capabilities.
Solution Approach 2:
The patent uses composite materials consisting of water-based polymers, water-dispersible pigments, and other water-compatible additives. This composite formulation achieves the desired coating properties (adhesion, durability, aesthetic appearance) without relying on organic solvents, thereby resolving the contradiction between ease of manufacture and health safety.
3Ease of repair
If organic solvents are used for stripping, then coating removal is effective, but organic solvent poisoning may be caused
Solution Approach 1:
The patent changes the chemical parameter of the stripping agent from organic solvent-based to water-based. The removal agent uses water as the primary component with water-soluble additives that effectively break down and remove the water-based coating material. This parameter change maintains stripping effectiveness while eliminating the health hazards associated with organic solvent exposure during the removal process.
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 artificial nails exhibit high mimicry, are soft without losing toughness, and have a simple production process, making them suitable for mass production while avoiding health risks associated with solvent use.
Implementation Method 1
which are coated on the surface of nails and irradiated by an ultraviolet (UV) exposure machine or light emitting diode (LED) exposure machine as a light source to form a cured coating film
Data Source
AI summary
The present disclosure provides a resin composition, an adhesive-dropping material, an adhesive-pressing material, and a preparation method and application thereof. The resin composition comprises the following components: an ester-based prepolymer; a reactive diluent; and a photoinitiator; wherein the addition amount of the ester-based prepolymer is 60 to 80 parts by weight, the addition amount of the reactive diluent is 15 to 30 parts by weight, and the addition amount of the photoinitiator is 1 to 5 parts by weight, based on the part by weight. The artificial nail prepared by using the resin composition, the adhesive-dropping material, and the adhesive-pressing material according to the present disclosure has high mimicry. When in use, the artificial nail which is not completely hardened may be attached to the surface of the real nail and then hardened by UV light, so that the artificial nail is more conformable.