Heat shrink tubing is a type of plastic tube that contracts when exposed to heat. It’s commonly used to insulate wires, provide abrasion resistance, and bundle multiple wires together. This makes it indispensable for professionals in various fields such as electronics, automotive, and more.
But what’s the best way to apply it? In this guide, we’ll walk you through everything you need to know about heat shrink tubing, from choosing the right heat source to troubleshooting common issues.
Choosing the Right Heat Source
Your choice of heat source can significantly impact the quality of your heat shrink tubing application. Below, we explore two effective heat shrink tools:
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Electric Heat Gun:
A hot air gun is a preferred heating tool for applying custom logo heat shrink tubing. Unlike open flames, heat guns offer adjustable temperature settings.
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Micro Butane Torch:
Heat Sources to Avoid
While there are many ways to apply heat, not all are suitable for heat shrink tubing.
- Hair Dryer: Heat shrink tubing demands a specific heat temperature for a proper seal. A hairdryer does not provide high enough temperatures for a uniform fit.
- Lighter: Using a lighter is not recommended due to its uncontrolled heat and higher risk of burns. The lack of precision often leads to uneven shrinkage and potential damage to the tubing.
Best Practices for Heating Heat Shrink Tubing
Following best practices ensures your heat shrink tubing applications are effective and long-lasting.
- Selecting the Right Tubing Size: For a secure and tight fit of the heat shrink tubing, choose the appropriate shrink ratio. Measure the diameter of the area to be covered and select tubing that will snugly fit once shrunk.
- Cutting the Tubing: Use sharp tools like scissors or a razor blade for clean cuts. This prevents frayed edges, ensuring a professional finish. Remember to cut the tubing 1.3 cm (1⁄2 in) longer than the section to be covered.
- Positioning the Tubing: When placing the heat shrink tubing over the target area, carefully slide it on without forcing it. Ensure it is centered and covers the entire section that needs insulation.
- Heating Technique: For a uniform fit, move the heating appliance along the tubing in a back-and-forth motion while rotating the covered item. This allows the tubing to shrink gradually to prevent burning or melting.
- Cooling Down: Once the heat shrink tubing has been positioned and heated, allow the tubing to cool for at least five minutes before manipulating the wiring into its proper place.
Troubleshooting Common Issues
Even with the best practices, you might encounter some problems. While the diameter of the tubing shrinks to form a tight fit, there is a longitudinal change of 10% that needs to be factored in when cutting the heat shrink tubing into pieces.
While top-quality tubing is durable, it is crucial to take caution when placing it over components with jagged edges. If mishandled, the sharp edges can puncture the tubing, resulting in cracks or splitting before or during the heating process.
Splitting or burn marks can be a result of using a heat range higher than the manufacturer’s recommended guidelines. If the tube shrinks unevenly or cracks, it should be carefully removed and the heat shrink should be reapplied.
Why Choose Polyolefin Over PVC
When it comes to materials, polyolefin is often preferred over PVC. Polyolefin is a cross-linked thermoplastic material that can withstand temperatures between 125°C to 135°C (257°F to 275°F). Polyolefin is typically more flexible, durable, and resistant to chemicals and UV light compared to PVC, which is more prone to cracking, and less resistant to extreme conditions.
Polyolefin is also easier to apply and lasts longer, making it ideal for a wide range of applications, from automotive to marine projects. Specifically, polyolefin can be used in automotive wiring, electronic assemblies, and outdoor applications where durability and flexibility are crucial.
Equip Yourself with the Best Heat Shrink Tools from ShrinkShop
Using the right tools and methods for heat shrink tubing is essential for optimal results. Electric heat guns and micro butane torches offer the best outcomes, providing controlled and effective heat application. By following best practices and choosing the right materials, you can ensure your projects are safe, durable, and professional.
Ready to elevate your heat shrink tubing game? Equip yourself with the best tools from ShrinkShop today! Contact us to learn more about our wide selection of custom heat shrink tubing and wiring accessories.