Stationery tape, most commonly known as clear adhesive tape or Scotch tape (a popular brand name), is a thin, transparent pressure-sensitive tape used primarily for binding, sealing, and mending lightweight materials like paper, cardboard, and plastic.
1. Physical Composition & Construction
A typical roll of stationery tape is constructed from three key components:
Backing (Carrier Film): This is the main body of the tape. It is most commonly made from:
Biaxially Oriented Polypropylene (BOPP): The standard for most clear tapes. It's strong, crystal clear, and moisture-resistant.
Cellulose Acetate: An older, more eco-friendly alternative that is biodegradable but less common today.
Polyvinyl Chloride (PVC): Used for heavier-duty or colored tapes.
The film is extremely thin, typically between 30 to 50 microns.
Adhesive: A pressure-sensitive synthetic rubber or acrylic-based glue is applied to one side of the backing. This adhesive is designed to form an instant bond when light pressure is applied, with no need for water, heat, or a solvent to activate it.
Release Coating: A very thin silicone layer is applied to the opposite side of the backing. This prevents the adhesive from sticking to itself when the tape is rolled up, allowing it to unwind smoothly.
The tape is wound onto a rigid plastic or cardboard core, which fits into a tape dispenser. Many dispensers include a serrated metal or plastic edge for easily tearing the tape to the desired length.