You use Scotch 70 tape by applying it in half-lap layers with moderate tension, particularly on electrical terminations exposed to outdoor conditions or contamination.
Scotch 70 Silicone Rubber Electrical Tape is a self-fusing, high-temperature arc- and track-resistant tape. Its primary application is sealing and insulating electrical connections, especially in harsh environments.
Key Application Method
Based on the provided information, the core method for applying Scotch 70 tape is:
- Apply in half-lap layers: Each new wrap should overlap the previous wrap by about half its width. This technique ensures a uniform thickness and helps the tape fuse together effectively.
- Use moderate tension: Pull the tape slightly as you wrap it. This tension helps the layers fuse and creates a tight seal, but avoid excessive stretching which could thin the tape too much.
Where to Use Scotch 70 Tape
Scotch 70 Tape is specifically recommended for certain situations:
- On all tape-like terminations: This refers to connections or splices that are built up and sealed using tape.
- For terminations operated:
- Outdoors
- In areas subjected to contamination
- In areas subjected to moisture
These conditions highlight the tape's suitability for protecting electrical components against environmental factors like UV rays, dirt, chemicals, and water.
Practical Application Steps
While the reference doesn't detail every step, a general process for applying self-fusing silicone tape like Scotch 70 often involves:
- Ensure the surface is clean and dry.
- Start wrapping the tape at a point away from the critical seal area and wrap towards it.
- Apply the tape using the half-lap method with moderate tension.
- Continue wrapping over the area requiring sealing or insulation.
- Complete the wrap beyond the critical area.
- Cut the tape and press down the end firmly. The tape will begin to fuse to itself immediately and continue to fuse over time.
Why Choose Scotch 70 Tape?
This type of silicone rubber tape offers several advantages, making it ideal for the mentioned applications:
- Self-Fusing: It bonds to itself without adhesive, creating a seamless, void-free seal.
- Environmental Resistance: Excellent resistance to tracking, arcing, UV light, ozone, and moisture.
- High Temperature Performance: Suitable for applications involving elevated temperatures.
- Electrical Insulation: Provides good dielectric strength.
Using the correct application technique ensures you maximize these benefits, creating a durable and reliable seal for critical electrical terminations.
