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Introduction to 5 types of outer insulation materials for wire harnesses and cables
Publish Time:
2026-03-04
Electronic wiring harnesses and cables are widely used in our daily lives. Today, Connector Network will mainly talk to you about their knowledge of outer packaging materials. Wiring harnesses and cables come in various colors from the appearance, and their main function is to provide insulation, protect internal circuits, prevent external wear and tear, as well as pollution and damage caused by adverse environments. Generally, the outer packaging materials of wire harnesses and cables vary depending on the color, material, and size. Let's take a look at the types of materials available in the following text.
Heat shrink tubing: The heat shrink tubing is tightly wrapped around the wire, making the rough surface smooth and providing insulation and electrical insulation. The adhesive backing tube can provide strong sealing to prevent moisture and chemical substances from corroding the wiring harness components. A hot air gun is required, which increases production time and may be difficult to apply to the entire seat belt.
Sleeves: Sleeves that are expandable or packable are easy to install and highly flexible, allowing for quick and easy wire bundling. Woven polyethylene sleeves are popular because they are durable and lightweight, maintaining complete flexibility in any direction even at low temperatures, allowing cable components and wire bundles to bend repeatedly without damage.
Spiral winding tube: Spiral winding tube allows cables and electronic harnesses to enter and exit the outer packaging material at multiple points, and also provides multiple color options for easy identification, such as orange, which is commonly used for high-voltage applications.
Split type loom tube: Split type loom tubes are generally cut down from the side to facilitate the insertion of cables and electronic harnesses. After installation, the cut is closed, and there is no need to heat shrink or glue the end, thereby reducing production time. Plastic tubes are usually made of polyamide, polyethylene, or polypropylene, but the handling of compressed wiring may be troublesome.
Tape: pressure-sensitive tape coated on one side of the tape can provide various backing materials and pressure-sensitive adhesive. PVC is the most commonly used tape material, but other materials can also be used, including cloth, felt, foam and aluminum foil. In addition, the tape also minimizes the flexibility of the harness.
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