Dosage Forms with Microrelief Surface Identification
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Solution Overview
Problem
Current methods for producing pharmaceutical dosage forms with unique identification features are costly, complex, and limited in terms of materials and surface configurations, struggling to create recognizable and identifiable forms using conventional manufacturing equipment.
Innovation Solution
A dosage form comprising a first portion with cavities and a second molded portion inlaid into these cavities, where the second portion is made of a thermally responsive material with a microrelief, allowing for intimate contact and various surface configurations, including raised or recessed features, to provide distinct visual effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional methods (intagliations, particle coating, multi-layer tablets) are used to create dosage forms with unique identification features, then product identification and differentiation are improved, but manufacturing cost and process complexity increase
Solution Approach 1:
The patent combines the identification feature (intagliation) with a functional coating layer in a single integrated structure. The coating is applied directly into the intaglio recesses during the tablet formation process, merging what were previously separate steps (creating intaglio, then separately applying coating) into one unified operation, thereby reducing manufacturing complexity while maintaining identification reliability
Solution Approach 2:
The coating material serves multiple functions simultaneously: it fills the intaglio recesses to create the identification feature, provides a distinct visual appearance for product differentiation, and can be formulated to control dissolution or release characteristics. This multi-functionality reduces the need for separate manufacturing steps and components
2Reliability
If powdery materials are applied to intagliations for highlighting, then visual identification is improved, but adhesion is insufficient and material falls out
Solution Approach 1:
The patent changes the physical state of the coating material from dry powdery form to a viscous or molten state during application. The material is applied in a formable state (such as melted wax, soft polymer, or viscous coating) that allows it to flow into and adhere to the intaglio recesses, then solidifies or sets to provide strong adhesion. This parameter change from powder to formable state resolves the adhesion problem while maintaining visual identification
Solution Approach 2:
The patent uses composite coating formulations that combine multiple materials with complementary properties. These may include binders, fillers, plasticizers, and adhesion promoters formulated together to create a coating that simultaneously provides good adhesion to the tablet surface and fills the intaglio recesses effectively. The composite nature allows optimization of both bonding strength and visual identification properties
3Strength
If waxy materials are used to promote bonding of filling material, then adhesion is improved, but removal with solvent becomes difficult
Solution Approach 1:
The patent employs waxy or polymeric materials that undergo reversible phase changes. The material is applied in a soft or molten state where it provides good adhesion and filling capability, then solidifies to maintain the identification feature. When removal is needed, the material can be dissolved or degraded by specific solvents or environmental conditions, allowing clean removal without compromising the permanent identification feature. This reversible parameter change enables both strong bonding during application and easy removal when needed
4Reliability
If microrelief patterns are stamped into tablets, then visual identification is improved, but production difficulties arise with irregular shapes and surfaces
Solution Approach 1:
Instead of attempting to stamp complex microrelief patterns onto pre-formed irregular tablets (the conventional approach), the patent inverts the sequence by forming the tablet with integrated intaglio recesses during the compression or molding process. The identification feature is created as part of the tablet formation itself, eliminating the need for subsequent stamping operations on irregular surfaces. This inversion of the manufacturing sequence resolves the production difficulty while maintaining visual identification reliability
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
This solution enables the creation of dosage forms with enhanced identification and aesthetic features using conventional equipment, improving manufacturing efficiency and reducing costs while maintaining the efficacy of the active ingredients.
Implementation Method 1
the second portion comprises a solidified thermally responsive material
Data Source
AI summary
The present invention provides an edible dosage form that incorporates optical elements (e.g., printed patterns, microrelief gratings, and/or macrorelief gratings), capable of producing unique optical effects and images in order to enable a user to better identify and differentiate the dosage forms, as well as to improve the detection of counterfeit production thereof, wherein the edible dosage forms may be made in a variety of ways to incorporate the optical elements therein.