Secondary Encapsulation of Solid Inclusions in Softgel Capsules

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Solution Overview

Problem

Existing oral dosage forms, such as softgel capsules, face challenges in incorporating multiple active ingredients without chemical incompatibilities and maintaining the chemical stability of each ingredient.

Innovation Solution

The development of a method and apparatus for secondary encapsulation of solid inclusions using a rotary die process, which allows for the encapsulation of preformed solid inclusions in soft elastic capsules, maintaining their pharmaceutical characteristics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If multiple active ingredients are incorporated in a single softgel capsule using conventional rotary die method, then convenient delivery of multiple medications and increased user compliance are improved, but chemical incompatibilities and reactions between different active ingredients occur

Engineering Contradiction:

Improveconvenient delivery of multiple medicationsVSAvoidchemical incompatibilities

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The softgel capsule is divided into multiple separate chambers or compartments, with each chamber containing a different active ingredient. This physical segmentation prevents chemical interactions between incompatible ingredients while allowing multiple medications to be delivered in a single capsule, resolving the contradiction between convenient multi-medication delivery and chemical compatibility.

Inventive Principle:

Principle #1Segmentation

2Stability of the object's composition

If preformed solid inclusions are encapsulated in soft elastic capsules using rotary die process, then established pharmaceutical characteristics such as physical and chemical stability are maintained, but the complexity of the encapsulation apparatus and process increases

Engineering Contradiction:

Improvechemical stabilityVSAvoidapparatus complexity

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

Preformed solid inclusions (such as tablets or capsules) are nested within the softgel capsule matrix. The solid inclusions are placed into cavities within the encapsulation die, and the liquid or semi-solid fill material is then formed around them. This nesting approach maintains the pharmaceutical characteristics of the preformed solids while integrating them into a unified dosage form, managing the complexity through a systematic multi-step process.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The preformed solid inclusions are prepared and positioned within the encapsulation die cavities before the liquid or semi-solid fill material is introduced. This preliminary placement ensures that the solid inclusions are properly positioned and protected within the capsule structure, maintaining their pharmaceutical characteristics while simplifying the overall encapsulation process.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If solid inclusions are encapsulated to retain established pharmaceutical characteristics, then active ingredient release profile and bioavailability are maintained, but the manufacturing precision requirements increase

Engineering Contradiction:

Improveactive ingredient release profileVSAvoidpositioning precision

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The encapsulation die is designed with specifically shaped and positioned cavities that correspond to the dimensions and orientation of the preformed solid inclusions. Each cavity is locally optimized to receive and hold the solid inclusion in the correct position, ensuring proper release profile and bioavailability. This local quality approach maintains manufacturing precision by designing the die cavities to match the specific requirements of each solid inclusion type.

Inventive Principle:

Principle #3Local quality

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 that can deliver multiple medications in a single dose while preserving the chemical stability and pharmaceutical characteristics of each solid inclusion, thereby enhancing user compliance and avoiding chemical reactions.

Implementation Method 1

trapping the at least one solid inclusion between the continuous first film, in a section of the continuous first film aligned over a die cavity, and the wedge to form a first half of a capsule within a cavity of the first rotating encapsulation die

Methodology Applied

Scientific EffectMechanical containment: Physical Containment

Implementation Method 2

simultaneously fusing a first pair of edges of the continuous first film and a second pair of edges of the continuous second film between the walls of the cavity of the first rotating encapsulation die and a cavity wall of the second rotating encapsulation die to hermetically seal the at least one solid inclusion into the closed capsule

Methodology Applied

Scientific EffectFusion: Melting

Data Source

PatentUS12324857B2Apparatus and process for secondary encapsulation of solid inclusions using the rotary die process

Publication Date: 2025.06.10 R P SCHERER TECH INC

AI summary

Disclosed herein are a manufacturing process for encapsulating at least one solid inclusion into a softgel capsule. Also disclosed herein is a system for secondary encapsulation of solid inclusions using the rotary die process and system. Also disclosed herein are dosage forms having at least one solid inclusion encapsulated therein.