Tablet Film Coating Composition for TiO2-Free UV Laser Printing
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Solution Overview
Problem
The use of titanium oxide as a white colorant in film coatings for tablets and capsules is being phased out due to its potential carcinogenicity, and existing UV laser printers rely on titanium oxide for printing, making it impossible to perform laser printing without it.
Innovation Solution
A film coating composition comprising zinc oxide and optional additives like talc, calcium carbonate, magnesium oxide, and polyethylene glycol is used to create a film layer suitable for laser printing, which can replace titanium oxide.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If titanium oxide is used as a white colorant in film coating, then laser printing capability is enabled, but carcinogenicity risk increases
Solution Approach 1:
The patent removes titanium oxide from the film coating composition while maintaining laser printing capability through alternative colorants and formulation adjustments, thereby eliminating the carcinogenic risk while preserving the essential printing function
Solution Approach 2:
The patent modifies the chemical composition parameters of the film coating by replacing titanium oxide with alternative white colorants and adjusting the ratio of other components to maintain optical properties and laser printing performance without using titanium dioxide
2Illumination intensity
If titanium oxide is used in film coating, then white coloring effect is achieved, but health safety is compromised
Solution Approach 1:
The patent employs alternative colorants that are safer and potentially more cost-effective than titanium oxide, achieving the required white coloring effect through different chemical compounds that do not carry the carcinogenic label
Solution Approach 2:
The patent creates a composite film coating formulation that combines alternative white colorants with other coating components to achieve the desired optical properties and printing performance while eliminating titanium oxide from the composition
3Ease of operation
If titanium oxide is used for laser printing, then printability is enabled, but material safety is reduced
Solution Approach 1:
The patent introduces intermediary substances and formulation adjustments that enable laser printing to occur on the alternative colorant-based film coating, serving as mediators that facilitate the printing process without requiring titanium oxide
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 allows for effective laser printing on tablets and capsules without using titanium oxide, providing a safe and functional alternative with excellent white coloring and reduced scuffing, while maintaining printability.
Implementation Method 1
a film coating polymer composition for film coating of a tablet or capsule, comprising (a) zinc oxide and (b) at least one selected from the group consisting of talc, calcium carbonate, and magnesium oxide
Implementation Method 2
a UV laser printer that is commonly used enables printing by inducing color development of titanium by removing oxygen from titanium oxide
Data Source
AI summary
An aspect of the present invention provides a composition for film coating, which can replace titanium oxide suspected of being carcinogenic and, especially, a composition for film coating suitable for laser printing after film coating. Another aspect of the present invention provides a composition for film coating, which has an excellent white coloring effect and a reduction in scuffing. Another aspect of the present invention provides a method for laser printing on tablets or capsules by using the composition according to the present invention.