Film Coating Composition for Titanium Dioxide-Free Opacity
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Solution Overview
Problem
The need for a film coating composition that is safe without containing titanium dioxide, while providing high opacity and uniformity, and addressing issues of low whiteness and opacity in materials with dark colors or stains, particularly in health functional foods and nutritional supplements.
Innovation Solution
A film coating composition comprising calcium carbonate and hydroxypropyl methylcellulose (HPMC) in specific weight ratios, along with optional additives, to achieve high opacity and uniformity without titanium dioxide, ensuring stability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If titanium dioxide is used as a pigment or opacifying agent, then excellent whiteness and opacity are achieved, but carcinogenicity issues arise and it is prohibited as a food additive in some countries
Solution Approach 1:
The patent replaces titanium dioxide with calcium carbonate, which is a safer, more economical alternative that can be easily discarded or removed from the system, eliminating the carcinogenicity concern while maintaining the desired optical properties through controlled particle size and surface treatment
Solution Approach 2:
The patent changes the particle size parameters of calcium carbonate to optimize its optical properties, using ultrafine particles (0.1-10 μm) with specific surface areas and controlled morphology to achieve opacity and whiteness comparable to titanium dioxide without the safety concerns
2Object-affected harmful factors
If calcium carbonate is used as a substitute for titanium dioxide, then safety is improved, but opacity and whiteness are deteriorated
Solution Approach 1:
The patent optimizes particle size parameters of calcium carbonate to 0.1-10 μm with controlled surface area and morphology to maximize light scattering and absorption, achieving opacity and whiteness comparable to titanium dioxide while maintaining safety
Solution Approach 2:
The patent creates a composite coating system combining calcium carbonate with polymers and surfactants, where the calcium carbonate particles are embedded in a matrix that enhances their optical properties and provides uniform distribution, resulting in improved opacity and whiteness while maintaining safety
3Illumination intensity
If the amount of film coating is increased to improve opacity, then opacity is improved, but film strength and identification of imprints are overshadowed and processing time is lengthened
Solution Approach 1:
The patent changes the particle size parameters of calcium carbonate to ultrafine dimensions (0.1-10 μm) with optimized surface area, which increases light scattering efficiency per unit volume, allowing achieving high opacity with minimal coating thickness and preserving film strength and imprint identification
Solution Approach 2:
The patent creates local variations in particle size distribution within the coating, using a mix of ultrafine particles for opacity and slightly larger particles for structural integrity, with optimized surface area and morphology to achieve both opacity and film quality without increasing overall coating amount
4Illumination intensity
If the content of calcium carbonate is increased to improve opacity, then opacity is improved, but the proportion of other components is reduced and coating layer formation is difficult
Solution Approach 1:
The patent optimizes particle size parameters of calcium carbonate to 0.1-10 μm with controlled surface area and morphology, which improves dispersion and coating uniformity, allowing high calcium carbonate content (60-90 wt%) while maintaining ease of coating layer formation through optimized particle characteristics
Solution Approach 2:
The patent creates a composite system where calcium carbonate particles are embedded in a polymer matrix with optimized ratios, using surfactants and dispersants to ensure uniform distribution and proper coating layer formation even at high calcium carbonate contents, maintaining ease of manufacture while achieving high opacity
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 provides excellent opacity and uniformity, maintaining film strength and adhesion, and prevents quality deterioration, with improved processing efficiency and stability under stress conditions.
Implementation Method 1
Calcium carbonate (CaCO3), which has a high whiteness index, may provide excellent opacity
Implementation Method 2
calcium carbonate, which has a high whiteness index, but has a lower refractive index than that of titanium dioxide
Implementation Method 3
10 wt% to 38 wt% of hydroxypropyl methylcellulose (HPMC) compared to the total weight of the composition
Data Source
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AI summary
The present invention relates to a film coating composition, and specifically to: a film coating composition having excellent safety and shielding properties; and a film coating liquid comprising same.