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High Flame Retardancy PFA Heat Shrink Tube - Top China Factory & Suppliers for Extreme Environments
⚡ Product Features
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Ultra-Wide Temperature Range• Continuous use: -200°C to 260°C
• Short-term exposure to 300°C instantaneous temperatures possible. High thermal deformation temperature prevents cracking after shrinkage.
• Maintains flexibility at -80°C, avoiding brittleness. -
Superior Chemical Stability• Resistant to strong acids (e.g., hydrofluoric acid, nitric acid), alkalis (e.g., sodium hydroxide), organic solvents (e.g., acetone, xylene), and oils.
• Reacts only with elemental fluorine and molten alkali metals (e.g., sodium, potassium) at high temperatures. -
Excellent Electrical Insulation• Stable dielectric constant (2.1), consistent across 60Hz–60MHz frequency range.
• Volume resistivity >10¹⁸Ω·m, surface resistance >10¹³Ω, arc resistance >165 seconds. No conductive channels after damage. -
Low Friction & Non-Stick Properties• Dynamic friction coefficient 0.2–0.3, hydrophobic surface (contact angle 114°), preventing media adhesion.
• Ideal for food processing equipment and medical catheters requiring contamination prevention. -
High Transparency & Cleanliness• Transparent material allows clear inspection of internal components.
• Low refractive index ensures outstanding transparency among plastics. -
Flame Retardancy & Safety• Meets UL94 V-0 standard, oxygen index >95%, non-combustible in air.
• Suitable for medical devices and aerospace wiring with strict safety requirements. -
Mechanical Strength & Wear Resistance• High tensile strength, abrasion-resistant, and anti-cutting.
• Shrink ratio 3:1 to 5:1 (model-dependent), tightly conforms to substrates after shrinkage. -
Environmental Durability• ROHS compliant, UV-resistant, maintains structural integrity in harsh environments.
• Lifespan 5–8 years under normal conditions; slow performance degradation in extreme environments.
🔧 Application
Product Application
◎ Semiconductor Manufacturing: Corrosion-resistant sealing for wafer transfer systems and etching equipment pipeline.
◎ Medical Devices: Biocompatible certified products for catheters, sensors, and sterile equipment insulation.
◎ Chemical anti-corrosion: Sealing for chemical pipeline interfaces and reactor linings.
Product Application
◎ Aerospace: High-temperature protection for aviation wiring and satellite harness sealing.
◎ Renewable Energy: Protection for lithium battery modules.
📋 Usage Instructions
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Selection Guide• High-clean environments (e.g., semiconductor) → Choose DuPont 451HP, transparent, low precipitation types.
• High-voltage insulation → Select wall thickness ≥1.0mm, Pressure resistant ≥600V, UL224 certified.
• Frequent bending → Select the thin-walled model with a contraction ratio of 3:1 and excellent flexibility. -
Shrinkage Process• Use heat gun at 200–230°C for uniform heating.
• Avoid local overheating to prevent melting or deformation.
• Ensure no bubbles or wrinkles after shrinkage. -
Precautions• Avoid contact with elemental fluorine and molten alkali metals at high temperatures.
• Store away from heat sources and strong oxidizers, keep dry and ventilated.
📐 Product Specification Sheet
| Inner Diameter Before Contraction (MM) | Wall Thickness Before Contraction (MM) | Inner Diameter After Contraction (MM) | Wall Thickness After Contraction (MM) |
| 3.0±0.2 | 0.15±0.03 | 2.3 | 0.20±0.03 |
| 3.5±0.2 | 0.15±0.03 | 2.7 | 0.20±0.03 |
| 4.0±0.2 | 0.15±0.03 | 3.1 | 0.20±0.03 |
| 4.5±0.2 | 0.15±0.03 | 3.4 | 0.20±0.03 |
| 5.0±0.2 | 0.15±0.03 | 3.8 | 0.20±0.03 |
| 6.0±0.3 | 0.15±0.03 | 4.6 | 0.20±0.03 |
| 7.0±0.3 | 0.15±0.03 | 5.4 | 0.20±0.03 |
| 8.0±0.3 | 0.15±0.03 | 6.2 | 0.20±0.03 |
| 9.0±0.3 | 0.15±0.03 | 6.9 | 0.20±0.03 |
| 10.0±0.3 | 0.15±0.03 | 7.7 | 0.20±0.03 |
| 11.0±0.3 | 0.2±0.05 | 8.5 | 0.25±0.05 |
| 14.0±0.3 | 0.2±0.05 | 10.8 | 0.25±0.05 |
Note
All special sizes and colors orders are available by customization.This item can reach flame retardancy level of V0.
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❓ Frequently Asked Questions
1
What is the maximum operating temperature of this PTFE heat shrink tubing?
This PTFE heat shrink tubing supports continuous use from -200°C to 260°C. It can also withstand short-term instantaneous temperatures up to 300°C without cracking or structural failure. At the low end, it remains flexible down to -80°C, making it suitable for cryogenic applications.
2
What chemicals is PTFE heat shrink tubing resistant to?
PTFE heat shrink tubing is highly resistant to a broad range of chemicals, including strong acids (such as hydrofluoric acid and nitric acid), alkalis (such as sodium hydroxide), organic solvents (such as acetone and xylene), and oils. It only reacts with elemental fluorine and molten alkali metals (e.g., sodium, potassium) under high temperature conditions.
3
What is the recommended shrinkage process for this tubing?
Use a heat gun set between 200°C and 230°C and apply heat evenly along the tubing. Avoid concentrating heat in one spot to prevent local melting or deformation. After shrinkage, inspect to ensure there are no bubbles or wrinkles. The shrink ratio is 3:1 to 5:1 depending on the model selected.
4
Is this product certified for medical and aerospace applications?
Yes. This PTFE heat shrink tubing meets UL94 V-0 flame retardancy standards with an oxygen index greater than 95%, making it non-combustible in air. It is biocompatible-certified and suitable for medical catheters, sensors, and sterile equipment insulation, as well as aerospace wiring and satellite harness sealing applications.
5
Are custom sizes and colors available for this product?
Yes. All special sizes and colors are available by customization. Our standard sizes range from 3.0mm to 14.0mm inner diameter before contraction. Please use the inquiry form on this page to specify your requirements — including size, color, wall thickness, and any other details — to receive an accurate quote.
6
How should PTFE heat shrink tubing be stored to maintain its performance?
Store the tubing away from heat sources and strong oxidizers. Keep it in a dry, well-ventilated environment to preserve its physical and chemical properties. Under normal storage and usage conditions, the expected lifespan is 5–8 years. In extreme environments, performance may degrade gradually over time, though the material remains ROHS compliant and UV-resistant.