Proprietary Hot Melt Extrusion in the Food Industry

 

In the food industry, proprietary hot melt extrusion is a technology that deals with food processing that involves cooking, mixing, kneading, and shaping mixed ingredients as they are made to pass through an opening known as a die that has been fashioned for food items. The high-temperature process leads to lesser contamination with inactivated enzymes and microorganisms.

This method entails the process of ingredients being taken to the extruder barrel. This is then transported by the screws. Furthermore, the presence of smaller flights hamper volume and causes the food to become more resistant to movement.

 

Hot Melt Extrusion Method

The process mentioned above results in the barrel getting full and the place between them becoming compressed. Successively, as the food is conveyed along the barrel, the screw molds it into a semi-solid mass. In addition, heating can be used to increase the temperature immediately.

After that, the food moves to a portion on the barrel where the flights are small, and the pressure is increased as the food is conveyed through one or multiple dies at the end of the barrel. As the food shows up at the discharged end, it enlarges to adopt the final shape and, after that, cools because any moisture forms steam.

By using this method, several shapes – tubes, rods, shells, or doughnuts – can be created. Examples of foods created using extrusion include crispy, crunchy, or puffed cereals.

 

Challenges in Hot Melt Extrusion

Using hot melt extrusion comes with a few disadvantages. The required energy input needed is greater than it is with other approaches, and some thermolabile substances may not be designed for the high temperatures that are utilized during the process.

While the dosage forms developed are usually highly stable in the long run, the recrystallization of active pharmaceutical ingredients as an effect of storage has been reported. The firmness depends on the type of active pharmaceutical ingredients, the excipients and polymers, its physical state in the end, and how the extrudate is packed and stored.

Improvement in Extruders

Over the last twenty years, extruders have been improved to meet the specific desires of the pharmaceutical industry because specific regulatory standards must be in place if excellent practices are to be upheld. Parts known to have a contact in the extruder must not react with the compound. The equipment must also meet validation and cleaning criteria.

The Food and Drug Administration has permitted nonstop processing so long it fulfills the principle of quality-by-design. What this means is that the development of high-grade products must involve the control of process parameters and raw materials to make sure that the quality of the final product can be correctly predicted. This, in turn, decreases the overall cost of production because continuous production involves the more effective use of the equipment and reduces the requirement for the analysis of final products.

PAT (Process Analytical Technology) has become very trendy in the pharmaceutical industry. It is already integrated at the laboratory scale for hot melt extrusion to analyze, track and characterize the process and, of course, the products that come from it. Many elements of observing can be designed to make certain the excellence of products is evaluated in real-time.

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