Thermoplastic Resin Composition for Artificial Nails
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Solution Overview
Problem
Current thermoplastic resin compositions for artificial nails face challenges in achieving a balance between transparency, processability, and softness, with existing materials either being too hard, prone to detachment, or too soft and prone to bending, while also experiencing issues with haze and color degradation when attempting to enhance softness.
Innovation Solution
A thermoplastic resin composition comprising a base resin with a specific weight ratio of a first copolymer formed by graft polymerization of a diene-based rubber polymer with an alkyl(meth)acrylate-based monomer and an aromatic vinyl-based monomer, and a second copolymer with similar monomers, along with a plasticizer, which enhances transparency, processability, and softness, achieving a haze of 2.0% or less and flexural strength of 280 to 420 kg/cm2.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If ABS thermoplastic resin composition is used for artificial nails, then the molded body separates easily from the injection machine and no burrs are generated, but the artificial nails become hard and prone to detachment due to different curvatures
Solution Approach 1:
The patent changes the chemical composition parameters of the resin by using a specific copolymer (methyl methacrylate/butadiene/styrene) with controlled monomer ratios and molecular weight, transforming the material properties to achieve both ease of manufacture and wearing comfort
Solution Approach 2:
The patent creates a composite resin system by combining multiple polymers (methyl methacrylate/butadiene/styrene copolymer with specific properties) to achieve a balance between manufacturing ease and wearing comfort that neither material could provide alone
2Ease of operation
If ethylene vinyl acetate or styrene/butadiene copolymer is used to increase softness, then wearing comfort is improved, but the end of the artificial nail is easily bent due to external impact
Solution Approach 1:
The patent optimizes the molecular weight and composition parameters of the copolymer to achieve the right balance between softness and strength, preventing the nail from being too soft while maintaining comfort
Solution Approach 2:
The patent creates different functional zones within the artificial nail structure, with the resin composition providing softness in certain areas while maintaining overall structural integrity and resistance to bending
3Illumination intensity
If methyl methacrylate/butadiene/styrene copolymer is used to maintain transparency, then transparency is improved, but haze increases when rubber content is increased to enhance softness
Solution Approach 1:
The patent precisely controls the composition parameters (monomer ratios) and physical parameters (molecular weight, particle size) of the copolymer to achieve the optimal balance between transparency and softness, preventing haze while maintaining both properties
4Ease of operation
If rubber content is increased in compounding to enhance softness, then softness is improved, but haze increases resulting in low transparency and degraded processability
Solution Approach 1:
The patent optimizes the rubber content and composition parameters to achieve the maximum softness while minimizing haze, creating the optimal balance point where both transparency and softness are maintained
Solution Approach 2:
The patent creates a homogeneous resin composition where the rubber particles are uniformly distributed at the optimal concentration level, ensuring consistent properties throughout the material without local defects that would cause haze
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 composition results in artificial nails that are transparent, offer excellent wearing comfort, and maintain processability, with improved flexibility and resistance to external impacts, making them suitable for various designs and applications.
Implementation Method 1
a first copolymer formed by graft polymerization of a diene-based rubber polymer having an average particle diameter of 50 to 200 nm with a first monomer mixture including an alkyl(meth)acrylate-based monomer and an aromatic vinyl-based monomer
Data Source
AI summary
Provided is a thermoplastic resin composition which includes: a base resin including, in a weight ratio of 70:30 to 90:10, a first copolymer formed by graft polymerization of a diene-based rubber polymer having an average particle diameter of 50 to 200 nm with a first monomer mixture including an alkyl(meth)acrylate-based monomer and an aromatic vinyl-based monomer and a second copolymer which is a copolymer of a second monomer mixture including an alkyl(meth)acrylate-based monomer and an aromatic vinyl-based monomer; and a plasticizer.