Polydextrose Coating Composition for Shiny Tablet Films
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current film-forming compositions for pharmaceutical tablets intended for gastric use fail to achieve a shiny appearance efficiently, requiring additional costly polishing steps and using polymers that do not effectively produce a glossy finish, leading to uneconomical and time-consuming processes.
Innovation Solution
A coating composition comprising a graft copolymer of polyvinyl alcohol and polyethers, combined with polydextrose, and auxiliary coating agents, which forms a quick-drying, shiny film when applied to tablets, eliminating the need for additional polishing and reducing process duration and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional film-forming compositions (acrylic or cellulosic polymers) are used for coating tablets intended for gastric use, then the coating process can be completed relatively quickly, but the tablets fail to achieve a shiny appearance
Solution Approach 1:
The patent uses a composite coating composition comprising polydextrose (a water-soluble polysaccharide) combined with film-forming polymers. This composite approach allows the coating to achieve both quick dissolution in gastric medium and a shiny appearance, resolving the contradiction between coating speed and aesthetic quality.
Solution Approach 2:
The patent modifies the chemical composition parameters of the coating by incorporating polydextrose in specific proportions (1-50% by weight). This parameter change enables the coating to form a glossy film while maintaining rapid dissolution, simultaneously improving both appearance and functionality.
2Manufacturing precision
If dragee coating processes with multiple successive applications of sugar syrup and fillers are used to achieve a shiny appearance, then the tablets obtain a glossy finish, but the process becomes uneconomical and time-consuming
Solution Approach 1:
The patent merges the functions of multiple conventional coating steps into a single film-coating operation. The polydextrose-based composition provides both the glossy appearance and protective function in one application, eliminating the need for successive syrup applications, drying steps, and polishing operations.
Solution Approach 2:
The patent extracts and eliminates the unnecessary intermediate steps (multiple syrup applications, extensive drying, polishing) from the conventional dragee process. By using a pre-formulated polydextrose composition, only the essential coating and drying steps remain, significantly reducing process time and cost.
3Productivity
If film coating processes with significant water evaporation are used to deposit thin films quickly, then the coating speed increases, but specific equipment with efficient drying systems is required
Solution Approach 1:
The patent uses polydextrose, a water-soluble polysaccharide that dissolves rapidly in gastric medium. This property allows the use of simpler, less expensive drying equipment since the coating material naturally dissolves quickly, reducing the need for complex high-temperature drying systems.
Solution Approach 2:
The patent changes the physical-chemical parameters of the coating composition by using polydextrose with specific solubility characteristics. This parameter change allows for reduced drying temperatures and simpler drying systems while maintaining fast coating speeds and rapid dissolution in gastric environment.
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 achieves a significant increase in gloss density and shiny appearance of coated tablets, enhancing their aesthetic appeal and patient acceptance, while reducing the complexity and cost of the coating process.
Implementation Method 1
film-forming compositions intended for the colored and shiny coating of ingestible solid forms
Implementation Method 2
A current of hot air, entering at a temperature greater than or equal to 40°C, ensures the drying of the sprayed dispersion and causes the film to coalesce around the tablets
Implementation Method 3
When light hits an object, most of the light enters the interior of the object and little of the light is reflected off the surface of the object. This surface reflection light is the appearance attribute called 'shiny'. For a shiny surface, the angle of the reflected light beam (called the 'mirror angle') is equal to the angle of the incident light.
Data Source
AI summary
Composition (C) for coating ingestible solid forms, comprising, per 100% of its mass - from 10% to 90% of a graft copolymer of polyvinyl alcohol and of polyethers (Pi), and - from 10% to 90% by mass of an auxiliary coating agent, characterized in that a non-zero mass proportion of said auxiliary agent is polydextrose. Processes for the preparation and use thereof.