Model: HHST-2X / HHST-3X
General Purpose Polyolefin Heat Shrink Tubing (HHST Series)
The Dicore HHST series polyolefin heat shrink tubing provides fast, reliable electrical insulation and mechanical protection for a wide range of applications. Engineered for 2:1 and 3:1 shrink ratios, this flexible tubing is flame-retardant (UL/CSA VW-1 certified), RoHS compliant, and rated for 600V and 125°C continuous operation. Available in a comprehensive range of sizes from 0.6mm to 250mm and multiple standard colors to suit your specific project needs.
Key Features & Benefits
- Versatile Shrink Ratios: Available in HHST-2X (2:1) for standard wire applications and HHST-3X (3:1) for covering large connectors and irregular shapes.
- Flame Retardant & Certified: Meets rigorous UL 224 VW-1 and CSA C 22.2 OFT standards, ensuring maximum safety in electrical, automotive, and marine environments.
- Fast Shrinking & Stable Length: Starts shrinking at just 70°C with a low longitudinal shrinkage of ≤5%, preventing the tube from pulling back during installation.
- High Dielectric Strength: Rated for 600V with a dielectric strength of ≥15 KV/mm and volume resistance ≥1014 Ω·cm for highly reliable insulation.
- Wide Operating Temperature: Performs exceptionally well in extreme environments ranging from -55°C to 125°C.
Common Applications
- Wire harnesses and cable bundling in automotive, marine, and aerospace industries
- Electrical insulation and termination of electronic components
- Strain relief and environmental sealing for connectors and splices
- Color-coding and phase identification for electrical panels and switchgear
Product Specifications & Technical Data
Model: HHST Series (HHST-2X, HHST-3X)
Material: Flexible Polyolefin
Available Colors: Black, Red, Blue, White, Yellow, Green, Clear, Yellow-Green (Other colors available on request)
Rated Voltage: 600V
Technical Properties
| Item | Test Method | Value |
|---|---|---|
| Operating Temperature Range | IEC 60068-2-14 | -55°C ~ +125°C |
| Minimum Shrink Temperature | – | ≥ 70°C |
| Full Recovery Temperature | – | ≥ 110°C |
| Radial Shrinkage | ASTM D 2671 | ≥ 50% |
| Longitudinal Shrinkage | ASTM D 2671 | ≤ ±5% |
| Tensile Strength | ASTM D 2671 | ≥ 14 MPa |
| Elongation at Break | ASTM D 2671 | ≥ 400% |
| Volume Resistivity | IEC 60093 | ≥ 1014 Ω·cm |
| Dielectric Strength | IEC 60243 | ≥ 15 kV/mm |
| Flammability | UL 224 / CSA C 22.2 | VW-1 / OFT |
HHST-2X Specification (2:1 Shrink Ratio)
| Size (mm) | As Supplied (mm) | After Recovery (mm) | Standard Package (m/spool) |
Application Range (mm) |
||
|---|---|---|---|---|---|---|
| I.D. | Wall Thickness | Max. I.D. | Wall Thickness | |||
| φ0.6 | 0.9±0.2 | 0.20±0.05 | ≤0.40 | 0.33±0.10 | 200 | 0.5～0.7 |
| φ0.8 | 1.1±0.2 | 0.20±0.05 | ≤0.50 | 0.33±0.10 | 200 | 0.6～0.8 |
| φ1.0 | 1.5±0.2 | 0.20±0.05 | ≤0.65 | 0.36±0.10 | 200 | 0.75～0.9 |
| φ1.5 | 2.0±0.2 | 0.20±0.05 | ≤0.85 | 0.36±0.10 | 200 | 0.95～1.4 |
| φ2.0 | 2.5±0.2 | 0.25±0.05 | ≤1.00 | 0.45±0.10 | 200 | 1.1～1.8 |
| φ2.5 | 3.0±0.2 | 0.25±0.05 | ≤1.30 | 0.45±0.10 | 200 | 1.4～2.3 |
| φ3.0 | 3.5±0.2 | 0.25±0.05 | ≤1.50 | 0.45±0.10 | 200 | 1.6～2.7 |
| φ3.5 | 4.0±0.2 | 0.25±0.05 | ≤1.80 | 0.45±0.10 | 200 | 1.9～3.2 |
| φ4.0 | 4.5±0.2 | 0.25±0.05 | ≤2.00 | 0.45±0.10 | 200 | 2.1～3.6 |
| φ4.5 | 5.0±0.2 | 0.30±0.08 | ≤2.30 | 0.56±0.10 | 100 | 2.4～4.0 |
| φ5.0 | 5.5±0.2 | 0.30±0.08 | ≤2.50 | 0.56±0.10 | 100 | 2.6～4.5 |
| φ5.5 | 6.0±0.2 | 0.30±0.08 | ≤2.75 | 0.56±0.10 | 100 | 2.85～5.0 |
| φ6.0 | 6.5±0.2 | 0.30±0.08 | ≤3.00 | 0.56±0.10 | 100 | 3.1～5.4 |
| φ7.0 | 7.5±0.3 | 0.30±0.08 | ≤3.50 | 0.56±0.10 | 100 | 3.7～6.3 |
| φ8.0 | 8.5±0.3 | 0.30±0.08 | ≤4.00 | 0.56±0.10 | 100 | 4.2～7.2 |
| φ9.0 | 9.5±0.3 | 0.30±0.08 | ≤4.50 | 0.56±0.10 | 100 | 4.7～8.0 |
| φ10 | 10.5±0.3 | 0.30±0.08 | ≤5.00 | 0.56±0.10 | 100 | 5.2～9.0 |
| φ11 | 11.5±0.3 | 0.30±0.08 | ≤5.50 | 0.56±0.10 | 100 | 5.7～10 |
| φ12 | 12.5±0.3 | 0.30±0.08 | ≤6.00 | 0.56±0.10 | 100 | 6.2～11 |
| φ13 | 13.5±0.3 | 0.35±0.10 | ≤6.50 | 0.69±0.10 | 100 | 6.7～12 |
| φ14 | 14.5±0.3 | 0.35±0.10 | ≤7.00 | 0.69±0.10 | 100 | 7.3～13 |
| φ15 | 15.5±0.4 | 0.35±0.10 | ≤7.50 | 0.69±0.10 | 100 | 7.8～14 |
| φ16 | 16.5±0.4 | 0.35±0.10 | ≤8.00 | 0.69±0.10 | 100 | 8.3～15 |
| φ17 | 17.5±0.4 | 0.35±0.10 | ≤8.50 | 0.69±0.10 | 100 | 8.8～16 |
| φ18 | 19.0±0.5 | 0.35±0.10 | ≤9.00 | 0.69±0.10 | 100 | 9.3～17 |
| φ20 | 22.0±0.5 | 0.40±0.12 | ≤10.0 | 0.83±0.15 | 100 | 10.4～19 |
| φ22 | 24.0±0.5 | 0.40±0.12 | ≤11.0 | 0.83±0.15 | 100 | 11.4～21 |
| φ25 | 26.0±0.5 | 0.45±0.15 | ≤12.5 | 0.89±0.15 | 50 | 12.9～24 |
| φ28 | 29.0±0.5 | 0.45±0.15 | ≤14.0 | 0.89±0.15 | 50 | 14.4～27 |
| φ30 | 31.5±1.0 | 0.50±0.15 | ≤15.0 | 1.00±0.15 | 50 | 16～29 |
| φ35 | 36.5±1.0 | 0.50±0.15 | ≤17.5 | 1.00±0.15 | 50 | 18～34 |
| φ40 | 41.5±1.0 | 0.55±0.15 | ≤20.0 | 1.00±0.15 | 50 | 21～39 |
| φ45 | 46.5±1.0 | 0.55±0.15 | ≤22.5 | 1.00±0.15 | 25 | 23.5～44 |
| φ50 | ≥50 | 0.55±0.15 | ≤25.0 | 1.10±0.15 | 25 | 26～49 |
| φ60 | ≥60 | 0.60±0.15 | ≤30.0 | 1.20±0.15 | 25 | 35～55 |
| φ70 | ≥70 | 0.65±0.15 | ≤35.0 | 1.30±0.20 | 25 | 40～65 |
| φ80 | ≥80 | 0.65±0.15 | ≤40.0 | 1.30±0.20 | 25 | 45～75 |
| φ90 | ≥90 | 0.65±0.15 | ≤45.0 | 1.30±0.20 | 25 | 50～85 |
| φ100 | ≥100 | 0.65±0.20 | ≤50.0 | 1.30±0.20 | 25 | 55～95 |
| φ120 | ≥120 | 0.65±0.20 | ≤60.0 | 1.30±0.20 | 25 | 65～115 |
| φ150 | ≥150 | 0.65±0.20 | ≤70.0 | 1.30±0.20 | 25 | 80～145 |
| φ180 | ≥180 | 0.65±0.30 | ≤90.0 | 1.30±0.30 | 25 | 95～175 |
| φ210 | ≥210 | 0.65±0.30 | ≤105.0 | 1.30±0.30 | 25 | 110～205 |
| φ230 | ≥230 | 0.65±0.30 | ≤115.0 | 1.30±0.30 | 25 | 120～225 |
| φ250 | ≥250 | 0.65±0.30 | ≤125.0 | 1.30±0.30 | 25 | 130～240 |
| Other sizes are available upon special order | ||||||
HHST-3X Specification (3:1 Shrink Ratio)
| Size (mm) | Before Shrinking ID (mm) |
After Shrink | Packing (m) |
|
|---|---|---|---|---|
| ID (mm) | Thickness min (mm) | |||
| 1.5/0.5 | 1.6 | ≤0.5 | 0.45 | 200 m/roll |
| 3.0/1.0 | 3.2 | ≤1.0 | 0.55 | 200 m/roll |
| 4.5/1.5 | 4.8 | ≤1.5 | 0.60 | 100 m/roll |
| 6.0/2.0 | 6.4 | ≤2.0 | 0.65 | 100 m/roll |
| 9.0/3.0 | 9.5 | ≤3.0 | 0.75 | 100 m/roll |
| 12.0/4.0 | 12.7 | ≤4.0 | 0.80 | 50 m/roll |
| 18.0/6.0 | 19.1 | ≤6.0 | 0.90 | 50 m/roll |
| 24.0/8.0 | 25.4 | ≤8.0 | 1.20 | 50 m/roll |
| 39.0/13.0 | 39.0 | ≤13.0 | 1.25 | 50 m/roll |
Frequently Asked Questions (FAQ)
Q: What is the difference between the HHST-2X and HHST-3X series?
A: The main difference is the shrink ratio. HHST-2X has a 2:1 ratio, making it ideal for general wire insulation and bundling. HHST-3X has a 3:1 ratio, allowing it to easily slip over larger connectors, lugs, and irregular shapes before shrinking tightly onto the smaller wire.
Q: At what temperature should I shrink the HHST tubing?
A: HHST tubing starts shrinking at 70°C. For optimal results, we recommend using a heat gun or hot air tool at 100-120°C. Avoid overheating as this can damage the tubing or the underlying components.
Q: Are these tubes flame retardant and safe for enclosed panels?
A: Yes, the HHST series is manufactured from flame-retardant polyolefin and meets the strict UL 224 VW-1 and CSA C 22.2 OFT flammability standards, making them extremely safe for use in enclosed electrical cabinets and automotive applications.
Q: Can I use HHST tubing outdoors or in harsh environments?
A: Absolutely. HHST tubing has an operating temperature range of -55°C to 125°C and offers excellent resistance to chemicals, acids, alkalis, and salts. It’s suitable for automotive, marine, and industrial outdoor applications.
Q: How do I choose the correct size for my application?
A: Select a tubing size where your wire or component diameter falls within the “Application Range” column. The tubing should be large enough to slip over the component before shrinking, but not so large that it won’t provide adequate compression after shrinking.
Q: Does Dicore supply custom colors or cut lengths in New Zealand?
A: We supply continuous rolls in standard phase colors (Black, Red, Blue, White, Yellow, Green, Clear, Yellow-Green). Custom colors, specific sizes, and bulk project orders can be provided upon request with fast local dispatch within New Zealand.
Q: What is the shelf life of heat shrink tubing?
A: When stored properly in a cool, dry place away from direct sunlight, HHST tubing has a shelf life of approximately 2-3 years from the date of manufacture. Always inspect tubing before use to ensure it hasn’t become brittle or damaged.
Q: Can HHST tubing be used for high voltage applications?
A: HHST tubing is rated for 600V with a dielectric strength of ≥15 KV/mm. For higher voltage applications (above 600V), please consider our HBBT series busbar insulation tubing which is specifically designed for 1kV to 35kV applications.