Model: HHST-2X / HHST-3X
General Purpose Polyolefin Heat Shrink Tubing (HHST Series)
The Dicore HHST series cross-linked polyolefin heat shrink tubing provides reliable electrical insulation and mechanical protection for a wide range of applications. Available in 2:1 and 3:1 shrink ratios, this flexible tubing offers flame-retardant performance, RoHS compliance, and a rated voltage of 600V with a continuous operating temperature range of -55°C to +125°C. Sizes range from 0.6mm to 250mm, with multiple standard colours available to suit different applications.
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 Performance: Meets UL 224 VW-1 and CSA C 22.2 OFT flammability requirements, making it suitable for electrical, automotive, and marine applications.
- 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.
- Electrical Insulation Properties: Rated voltage of 600V, with a dielectric strength of ≥15 kV/mm and volume resistivity of ≥10¹⁴ Ω·cm, providing reliable electrical insulation performance.
- 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 suitable for use in electrical cabinets and automotive applications where flame-retardant insulation is required.
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 is suitable for a range of automotive, marine, and industrial applications. Chemical compatibility should be checked against the specific substances and operating conditions involved.
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, heat shrink tubing should be kept in good storage conditions to maintain its material properties. Inspect the tubing before use for any signs of deterioration or damage.
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.