UV-Thermosetting Nail Sticker Composition for Curved-Surface Adhesion
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Solution Overview
Problem
Existing nail stickers fail to perfectly fit the curved surface of nails, leading to gaps and poor adhesion, and they require long drying times, affecting appearance and usability.
Innovation Solution
A composition for nail stickers made from UV thermosetting resin, photoinitiator, curing agent, thermal promoter, and leveling agent, combined with temperature-sensitive sustained-release essential oil microcapsules, allowing for synchronous UV and thermal curing, enhancing adhesion and aroma release, and featuring a microporous adhesive layer for air permeability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional nail stickers are used, then they are easy to apply, but they cannot perfectly fit the curved surface of nails, leading to gaps and poor adhesion
Solution Approach 1:
The patent uses UV-curable resin composition that transitions from a soft, moldable state before curing to a hard, adhesive state after UV curing. This parameter change allows the sticker to be applied easily in soft state and then transforms to provide strong adhesion and perfect fit after curing, resolving the contradiction between ease of application and fitting precision.
Solution Approach 2:
The patent employs a composite resin composition containing multiple components (polyester polyol, isocyanate, acrylate monomer, photoinitiator) that work together to achieve both softness for conforming to nail curves and hardness for strong adhesion after curing. The composite material properties enable the sticker to adapt to curved surfaces while maintaining reliable bonding.
2Loss of time
If traditional nail polishes are used, then various colors are available, but they require long drying times
Solution Approach 1:
The patent replaces the natural evaporation/drying process of traditional nail polishes with UV photopolymerization curing. Instead of relying on time-consuming evaporation, the UV-curable resin composition undergoes rapid chemical curing when exposed to UV light, dramatically reducing the time required from minutes to seconds and significantly improving productivity.
3Speed
If UV-curable gel nail stickers are used, then curing speed is improved, but the radian cannot fit the curved surface of user's nail perfectly
Solution Approach 1:
The patent creates a dynamic application process where the sticker material transitions from a soft, adaptable state during application to a rigid, stable state after curing. The UV-curable resin composition allows the sticker to be molded to the nail's curved surface in its uncured state, then rapidly transforms upon UV exposure to lock in the precise fit while maintaining high curing speed.
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 nail stickers achieve perfect fit to nail curves, reduce gaps and bubbles, enhance adhesion, and provide a lasting aroma while ensuring hardness, glossiness, and durability, with improved curing speed and efficiency.
Implementation Method 1
the composition contains a UV thermosetting resin which is UV-curable and thermocurable and is available for synchronous UV curing and thermal curing
Implementation Method 2
the nail sticker is stuck to a nail and then subjected to UV thermal curing; and the nail sticker after being cured is firmly stuck to the nail in a glossy and hard state
Data Source
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AI summary
The present application discloses a nail sticker, a composition for the nail sticker and a method for preparing the composition. Raw materials of the composition include a sizing material, which is made of the following raw materials in parts by weight: 45-85 parts of a UV thermosetting resin, 2-9 parts of a photoinitiator, 1.5-2 parts of a curing agent, 0.1-1 part of a thermal promoter, and 0.1-1 part of a leveling agent. Like baking delicious food, the nail sticker made of the composition according to the present application can undergo a fantastic physicochemical reaction under the action of light and heat. After the composition is cured in an accelerated manner, a formed film is plump and glossy with improved tenacity, hardness, weatherability and insulativity as well as high adhesion, and has an edge that is less liable to wrinkling and upwarping. Meanwhile, by adding a temperature-sensitive sustained-release essential oil microcapsule, the nail sticker made of the composition according to the present application can also release a pleasant aroma by persistently releasing essential oil via micropores in a capsule wall. The synchronization of the release of essential oil molecules with light/thermal curing also promotes the essential oil molecules to be diffused to the interior of the sizing material more uniformly in a wider range, and during the curing and film forming of the nail sticker, an aroma spreads as tantalizing as that of baked food.