General
Shrink rate	3:1
Wall thickness	Thin-walled
Adhesive	without thermoplastic adhesive

The shrink tube SB 9-3 tr 10m from Cellpack is a heat-shrink tube with a shrink ratio of 3:1, specifically designed for use in cable and wiring protection technology. It is supplied in a 10-meter roll box and is suitable for insulating and mechanically protecting cables and wires. The thin-walled construction without thermoplastic adhesive allows for precise adaptation to the cables to be protected, with shrinkage triggered by heat. The tube is suitable for use in installations subject to chemical stress, as it provides effective protection against aggressive media.

Shrink tube
The shrink tube SB 9-3 tr 10m is a thermoplastic product that changes shape when heated to approximately 100 °C to 120 °C, shrinking to about one-third of its original outer diameter. This 3:1 shrink ratio enables use on cables with a diameter of up to 3 mm, forming a tight, shape-stable fit after shrinking. The thin-walled structure ensures minimal volume increase after shrinking, allowing for compact installation, especially in tight installation situations.

Applications
Typical applications include protecting cables and wires from chemical influences, such as solvents, oils, or acidic or alkaline substances. The tube also provides good mechanical protection against abrasion, pressure, and light mechanical stress. It is therefore suitable for industrial installations, machine building, electrical installations, and environments with increased contamination risk. Common uses include shielding connection points, sealing cable entries, or insulating wire connections.

Functions and equipment in detail
The shrink tube is manufactured without thermoplastic adhesive, meaning it does not form a self-adhesive seal after shrinking. Adhesion occurs solely through shape-stable adaptation to the wire. The 10-meter roll box enables efficient handling and storage, with the tube supplied as a continuous piece. Processing is done by targeted heat application, for example using a hot air blower, ensuring even shrinking and a homogeneous surface.

Technology explained simply
The shrink technology is based on a thermoplastic material that changes shape when heated. The shrink tube is slid over the wire to be protected and then heated. The material contracts and conforms precisely to the wire’s shape. The 3:1 shrink ratio means a tube with an original outer diameter of 9 mm will shrink to approximately 3 mm. This allows flexible adaptation to various cable diameters within the specified range.

Compatibility and accessories
The shrink tube is designed for use with cables and wires having a diameter of up to 3 mm. It is not specifically designed for particular cable types, but can be universally applied to various wire types, provided mechanical and chemical loads remain within specified limits.

Installation and mounting
Mounting is done by sliding the shrink tube over the wire to be protected and then applying heat. It is important to ensure even heat distribution to achieve uniform shrinking. Use of a hot air blower is recommended to enable controlled heating. After shrinking, the tube should lie tightly against the wire without visible wrinkles or air bubbles.

Advantages in operation
The shrink tube provides a reliable mechanical and chemical protective layer, extending cable lifespan and increasing installation reliability. The thin-walled structure minimizes space requirements, while the 3:1 shrink ratio enables flexible adaptation to various cable diameters. Processing is simple and requires no additional adhesives, reducing installation time and simplifying cleaning.