Heat shrink tubing is a polymer-based tube (made of polyolefin, fluoropolymer, or silicone) designed to shrink radially when heated. Its diameter can reduce to 1/2~1/6 of its original size, forming a tight protective layer for insulation, sealing, and corrosion resistance.
How It Works
● Cross-linking Technology: Electron beam or gamma radiation creates molecular cross-links, enabling “memory effect”.
● Heat Activation: Heating triggers shrinkage to its pre-expanded state.
Key Applications：
- Electrical Insulation: Prevents short circuits (e.g., household appliances, automotive wiring).
2. Mechanical Protection: Resists abrasion (e.g., robotic cables, underground pipes).
3. Environmental Sealing: Waterproofing for outdoor cables, marine equipment.
4. Identification: Color-coded labels for cables (e.g., red for high-voltage lines).
Common Types
● Polyolefin Cost-effective for electronics & appliances (Shrink ratio 2:1~3:1)
● Fluoropolymer High-temperature & fuel resistance (Aerospace, automotive engines)
● Dual-Wall Adhesive Waterproof sealing with inner adhesive (Submarine cables)
● Ultra-Thin 0.15mm wall for micro-electronics (e.g., smartphone circuits)
Why Choose Heat Shrink Tubing?
● Quick Installation: Shrinks with heat gun or flame (vs. cold shrink requiring pre-expanded core).
● Versatility: Sizes from 0.5mm to 200mm for microchips to power grids.
● Safety Compliance: Meets UL, RoHS, and REACH certifications.
Did You Know?
● Originally developed for NASA rockets in the 1950s to protect spacecraft wiring.
● Medical-grade tubing survives gamma-ray sterilization for surgical tools.
From space to the ocean floor, heat shrink tubing silently safeguards critical connections.
Contact us for application guides or product selection!