Soft gelatine capsule temperature regulation: All you need to know

Soft gelatine capsule temperature regulation: All you need to know


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  • Source: Microbioz India

  • Date: 10 Mar,2023

A solid oral dosage form, capsules are used for the delivery of life-saving medications, minerals, vitamins, and other healthful elements that are found in dietary supplements. These user-friendly containers make accurate dosing, mobility, and a high degree of consumer compliance possible. Other options include formulations that are more difficult to transport, such as liquid, powder, or paste.

Gelatin capsules, which are the universally preferred form, are an elegant format that use gelatin as the major ingredient in the gelling process. In recent years, there has been a shift towards more consciousness among consumers regarding the history, viability, and health implications of the things they purchase. This is in part spurred by the tightening of labelling legislation and transparency on food goods, such as the EU law on food information to consumers. In other words, labelling laws are becoming more stringent.

Food additives are compounds that are not typically taken as a food in themselves and are not typically an ingredient that is distinctive of food. These substances are also referred to as E-numbers. Since gelatin is considered to be a type of food, rather than a food additive, it does not have an E-number because the E-numbering system does not apply to food. There are a variety of substitutes for gelatin that have been assigned an E-number, such as Hydroxypropyl methylcellulose (HPMC) and modified starch.

In recent times, many vegetarian lobby groups in India have been putting pressure on the Indian government to make HPMC capsules the normal dosage form for pharmaceuticals. The government of India decided to investigate whether or not such a step would be successful by commissioning a feasibility study. According to the findings of the study, the use of gelatin capsules as a method for administering medication is generally the safest choice, as they are the most effective, efficient, and least prone to manufacturing difficulties. In the end, the decision to maintain gelatin as the benchmark was made by the Indian government.

Difference between Soft and Hard Gelatine Capsules:

Hard capsules, also known as hardcaps, and Soft capsules, also known as softgels, are the two primary varieties of gelatin capsules that may be purchased. Hard capsules are constructed using two cylinder-shaped shells, each of which is sealed at one end. The upper part, which is known as the cap, has a diameter that is marginally bigger than the lower part, which is known as the body. Because of the flawless fit between these two components, the resulting assembly is completely airtight.

Hard Capsules

The production of the hardcaps comes before the actual filling with the active substance. In the subsequent stage of the process, contract manufacturers or the owners of the brand fill the empty gelatin capsules with the active ingredient or medicament.

Soft Capsules

Softgels, also known as soft capsules, are one-piece, hermetically sealed capsules that can contain liquids or semisolid fillings. In contrast to hard capsules, softgels have their contents added during the manufacturing process of the capsule itself.

Why Gelatine Capsules:

Medications or dietary supplements taken in these dose forms are safe and may be stored securely because of the gelatine capsules. Pure gelatin, which is a type of protein, has no flavour, does not include gluten or GMOs, and comes in an oral dose form that is safe and provides the customer with a positive experience. It gives producers the ability to personalise products according to colour, shape, or size in order to fulfil the criteria of the active filling and the demographics that are being targeted. Gelatin also provides a vast range of release profiles, ranging from enteric (slow) release to quick release of the active fill. This enables manufacturers to handle a wide spectrum of fillings while still satisfying the requirements of consumers.

Temperature control for soft Gelatine capsules:

While making soft gelatin, warm liquid gelatin is distributed across a slowly rotating stainless steel drum.  When the drum rotates, a stream of cooled dry air congeals the gelatin, resulting in a sticky elastic band that rolls off the other end. This narrow band is then automatically shaped into capsules, which are then filled with medication. Gelatin will begin to liquefy and lose its ability to solidify if the environment’s temperature and humidity levels are too high. The soft, wet capsules that have been produced by the capsulating machines are moved from those machines to drying drums or chambers, depending on the size of the capsules from which the moisture is to be removed, so that they can be rapidly dried.

In light of the susceptibility of soft gelatin capsules to the presence of moisture, it is essential for manufacturers to make use of desiccant dehumidifiers in order to remove excess humidity from the surrounding air. Because gelatin has a pliable consistency, the process of drying the capsule might be challenging. The conditions of the temperature and humidity must fulfil the critical requirements, which stipulate that neither one may exceed a value of 20. Throughout the encapsulation and packaging procedures, the humidity level must be kept between 30 and 5% and the temperature must be maintained at 23 degrees Celsius. At the same time, even as the process of drying is taking place, the humidity level must be maintained within the range of 15–5% while the temperature is set at 20°C. In the event that encapsulation and packing are being performed, the required level of humidity is 30+5% at 20 degrees Celsius. The drying process for soft gel capsules is notoriously difficult since the capsules have to be baked under stringently regulated conditions, such as Relative Humidity (RH) and temperature (both of which should not exceed 20), coupled with predetermined air circulation patterns and drying times. As any one of these parameters deteriorates, the capsule’s consistency may change, causing it to become brittle, extra soft, or some other characteristic.


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