Making of Medicated Hot Melt Pressure Sensitive Adhesive Patches

Medicated Hot Melt Pressure Sensitive Adhesive is prepared by incorporating the required medicated active ingredients into a specially selected Hot Melt Pressure Sensitive Adhesive formulation. This process enables the uniform distribution of the active ingredients within the adhesive matrix while maintaining its pressure-sensitive properties and suitability for coating applications.

1. Preparation of Medicated HMPSA

The required quantity of Hot Melt Pressure Sensitive Adhesive is first heated under controlled, moderate temperature conditions, until it reaches a suitable molten state. The prescribed medicated active ingredients are then gradually added to the molten adhesive. The mixture is continuously circulated and churned through a gears to ensure thorough blending and uniform distribution of the active ingredients throughout the adhesive mass.

The mixing process is continued for approximately 45 minutes, or until a homogeneous and consistent formulation is obtained. Care is taken to maintain suitable processing temperatures to minimise the possibility of thermal degradation of the active ingredients.

2. Storage and Cooling

Once the medicated adhesive mixture achieves the desired homogeneity, it is discharged into suitable moulds or containers in convenient blocks of approximately 500 grams each. These blocks are allowed to cool under controlled conditions until the adhesive solidifies. The prepared medicated HMPSA blocks are then stored appropriately until they are required for coating.

3. Hot Melt Coating and Lamination

During the coating operation, the prepared 500-gram medicated HMPSA blocks are fed into the hot melt coating machine. The adhesive is reheated to its specified processing temperature and delivered through a precision slot die to achieve a uniform coating on the selected release liner.

The coated release liner is subsequently laminated with the specified backing material, such as non-woven fabric or another suitable substrate, to produce a continuous medicated adhesive laminate.

4. Die Cutting and Final Packaging

In the subsequent converting operation, the laminated material is fed into a cutting machine, where it is first needle punctured. The punctured liner is peeled off and a fresh release liner is laminated. Further it is cut into the required shapes and / or dimensions according to the product specifications. The finished medicated patches are then inspected, counted and packed in suitable protective packaging to preserve their quality and integrity.

This integrated process provides a controlled manufacturing approach for producing uniform, flexible and accurately coated medicated adhesive patches.

Note the Processing temperatures, mixing conditions, formulation compatibility, active-ingredient stability and finished-product performance should be validated for each specific formulation.