KEYUACE Heat Shrink Tubing  

1.What is heat shrink tube?

Heat shrink tubing is a type of tubing that shrinks when heated and is used to protect wires, cables, and other components.
Features: Easy to operate, quick to install, but when choosing, you must take into account the size and performance requirements.

2.Main applications of heat shrink tubing

Mechanical protection:  Prevents physical damage such as abrasion, cuts and dents.

Environmental protection:  Seals components to prevent moisture and chemicals from entering.

Electrical insulation:  covers terminals, connections, connectors and wire repairs to ensure insulation.

Identification and marking:  Available in a variety of colors for color coding or custom printing.

Stress Relief: reduces the load on wires and cables.

Cable management:  Organizes wires for easy installation and maintenance.

3.Key factors when choosing heat shrink tube

Electrical Requirements:  Must meet industry standards (e.g., UL, CSA, ASTM) or specific industry specifications (e.g., automotive, aerospace).

Environmental requirements:  Consider working environment (indoor/outdoor), exposure to water, chemicals or physical damage.

Dimensions:

Extended Inner Diameter (ID):  The inner diameter before shrinkage should be larger than the part to be coated.

Rebuilt inner diameter (ID):  The inner diameter after shrinkage should be smaller than the part to be coated.

Shrinkage rate:  For example, 3:1 means that the shrinkage diameter is 1/3 of the original diameter.

Wall thickness: The thickness after shrinkage should be selected depending on the needs of the application.

Length and longitudinal shrinkage:  Can shrink longitudinally when heated, additional length must be reserved.

4.Common materials for heat shrink tubing

Polyolefin:
Temperature range: 125°C to 135°C (257°F to 275°F).
Durable, no shelf life issues, suitable for most general applications.

Heat Shrink Tubing with Adhesive Lining (Double Wall Tubing):
The inner adhesive layer melts when heated to form a seal suitable for waterproof and dustproof environments.

Special materials:
Such as PTFE, FEP, PVDF, etc., suitable for high temperature, high strength and other special environments. Higher cost but excellent performance.

5.Installation and handling of heat shrink tubing

Storage:  Avoid direct sunlight and store below 32°C (90°F) to prevent premature shrinkage.

Heating Tools:
General tool: handheld heat gun.
Other methods: Convection oven, focused light (less commonly used).

Heating recommendations:
Temperature: 150°C (300°F).
Time: Approximately 3 minutes.
Polyolefin tubing can withstand higher temperatures, providing greater flexibility.

Reducing longitudinal shrinkage:  Heat slowly from one end to the other to avoid excessive shrinkage.

6.Resume

Heat shrink tubing is a versatile protective material widely used in the field of electrical, mechanical and environmental protection.

Selection should be based on electrical performance, environmental conditions and size requirements.

Proper installation and storage ensures optimal performance and lifespan of heat shrink tubing.