Standard Operating Procedure for Use of Backing Materials in Transdermal Patches Production

1) Purpose

The purpose of this SOP is to define procedures for the selection, handling, and application of backing materials used in the production of transdermal patches.

2) Scope

This SOP applies to the use of backing materials during all stages of transdermal patch production, including formulation, lamination, and final assembly, within the facility.

3) Responsibilities

The Production Department is responsible for implementing and overseeing the use of backing materials as per this SOP. Quality Control (QC) personnel may conduct checks and inspections as required.

4) Procedure

4.1 Backing Material Selection

• 4.1.1 Select backing materials based on product specifications, including barrier properties, flexibility, and compatibility with patch components.
• 4.1.2 Verify that selected materials meet regulatory requirements and are sourced from approved suppliers.

4.2 Handling and Storage

• 4.2.1 Store backing materials in controlled conditions (e.g., temperature and humidity) to prevent moisture absorption, contamination, or damage.
• 4.2.2 Handle materials with care to avoid tears, folds, or other physical damage that could affect their performance in patch production.

4.3 Application and Lamination

• 4.3.1 Prepare backing materials for lamination by ensuring cleanliness and compatibility with adhesive and active ingredient layers.
• 4.3.2 Apply backing materials according to validated procedures and