Production of Hard Gelatin Capsule Shells

• Production of Hard gelatin capsules shells involves dipping stainless steel pins into a gelatin solution to form capsule halves.
• Production of Hard Gelatin Capsule Shells – Precise control in viscosity, temperature, and drying ensures consistent capsule quality for pharmaceutical use.
• The manufacturing of empty hard gelatin capsule shells is a specialized process often done on an industrial scale by capsule suppliers.

Raw Materials used in Production of Hard Gelatin Capsule Shells:

1. Gelatin: Derived from animal collagen (commonly bovine or porcine sources), gelatin provides the structural matrix.
2. Plasticizers: Substances like glycerin or sorbitol are added to enhance flexibility and prevent brittleness.
3. Water: Acts as a solvent and plasticizer.

Manufacturing Process:

The manufacturing process of empty hard gelatin capsule shells involves the following steps:

1. Preparation of Gelatin Solution

   • Gelatin Source: Derived from partial hydrolysis of collagen (Type A: acid treatment; Type B: alkali treatment).
   • Ingredients: Gelatin (20–30
   • Control: Temperature (50–60 °C) and viscosity are maintained for uniform wall thickness.

2. Dipping

   • Pins/Molds: Stainless steel pins (different diameters for body and cap) are dipped into the gelatin solution.
   • Depth & Time: Dipping depth and residence time control shell thickness.
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3. Rotation and Drying

   • Rotation: Pins are rotated to evenly distribute the gelatin film.
   • Drying: Pins pass through drying tunnels (20–25 °C, 40–50

4. Stripping & Trimming

   • Dried shells are stripped off the pins and cut to the desired length for body and cap sections.

5. Joining & Sorting

   • Body and cap are loosely joined to form a two-piece capsule, and defective shells are removed
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