Antimony-Free Polyester Glitter Coating for Cosmetics
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Solution Overview
Problem
Existing glitter products lack improved brilliance, skin feel, and uniform coating, often relying on antimony-based catalysts which are undesirable in cosmetic applications.
Innovation Solution
Development of an antimony-free polyester film coated with metal, preferably aluminum, produced using antimony-free catalysts and processed to achieve enhanced brilliance and skin compatibility, with a method involving cutting and coating techniques to ensure uniformity and smoothness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If antimony-based catalysts are used to produce polyester glitter, then the production process is established and reliable, but the glitter lacks improved brilliance and has poor skin feel for cosmetic use
Solution Approach 1:
The patent changes the chemical composition parameter by replacing antimony-based catalysts with alternative catalyst systems (such as titanium-based or germanium-based catalysts) in the polyester production process. This parameter change eliminates the harmful effects of antimony on skin feel while maintaining production reliability, and simultaneously improves brilliance by altering the surface properties of the polyester film that interact with light reflection.
Solution Approach 2:
The patent employs a thin metal coating layer (such as aluminum) on the polyester glitter surface that provides enhanced brilliance and skin compatibility. This thin coating acts as a sacrificial or surface-level modification that improves optical and tactile properties without requiring changes to the bulk polyester material, thereby achieving improved brilliance and skin feel while maintaining production efficiency.
2Manufacturing precision
If conventional coating processes are used on polyester glitter, then the process is simple, but the coating uniformity and smoothness are insufficient
Solution Approach 1:
The patent applies a preliminary treatment to the polyester film surface before the main coating process, such as plasma treatment, corona discharge, or chemical etching. This preliminary action modifies the surface energy and roughness of the polyester, creating optimal conditions for subsequent metal coating deposition. As a result, the metal coating achieves superior uniformity and smoothness without requiring complex multi-step coating equipment.
Solution Approach 2:
The patent introduces an intermediary layer or surface treatment between the polyester substrate and the metal coating. This intermediary layer (which could be a thin adhesive layer or a surface-modified zone) facilitates better adhesion and more uniform distribution of the metal coating material, thereby improving coating uniformity and smoothness while keeping the overall process relatively simple.
3Adaptability or versatility
If antimony-containing polyester film is produced, then the film has adequate mechanical properties, but the glitter has poor compatibility for cosmetic products
Solution Approach 1:
The patent changes the catalyst system parameter from antimony-based to alternative catalysts (such as titanium alkoxides or germanium compounds) in the polyester polymerization process. This parameter change eliminates the toxic antimony residues that compromise cosmetic compatibility, while the alternative catalysts maintain or even improve the mechanical properties of the polyester film through optimized molecular weight and polymer structure.
Solution Approach 2:
The patent creates a composite structure by combining polyester with a thin metal coating layer (such as aluminum, silver, or gold). This composite material provides both the mechanical strength of polyester and the enhanced brilliance and cosmetic safety of the metal coating, while the absence of antimony ensures compatibility with cosmetic formulations and skin contact requirements.
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 antimony-free glitter exhibits improved brilliance, skin feel, and coating uniformity, reducing adherence issues during production and enhancing manufacturing efficiency, while maintaining compatibility for cosmetic use.
Implementation Method 1
is coated with a metal, preferably aluminum
Data Source
Figure 1~4
Figure 5~7
AI summary
The present invention relates to glitters with improved surface properties, improved brilliance and improved skin feel, and methods for producing them, wherein the glitters, which are coated with a metal, preferably aluminium, comprise a substantially antimony-free polyester-based film, and methods for producing them.