Heat shrink identification tubing, also known as heat shrink marker sleeve, heat shrink numbered tubing, or printable heat shrink tubing, is manufactured from radiation-crosslinked polyolefin material through a specialized process.

 

This product combines the excellent properties of standard heat shrink tubing with a specially treated surface that enables precise, durable printing. Text, letters, symbols, and graphics can be printed on the tubing surface. After heating, the tubing shrinks tightly around the cable, forming a permanent identification system widely used for wire and cable identification.

 

**Key Features**

| Feature | Description |

| **Permanent Identification** | Printed characters remain clear and wear-resistant even after exposure to harsh solvents and oils |

| **Flexible Printing** | Supports Chinese, English, numbers, electrical symbols, special symbols; dual-sided printing available |

| **Excellent Environmental Resistance** | Resists oils, solvents, abrasion, and aging; suitable for harsh environments |

| **Fast Shrink Speed** | Initial shrink temperature 70-85℃; full shrink temperature 120-125℃ |

| **Flame Retardant & Eco-friendly** | VW-1 flame rating; RoHS compliant |

| **Wide Operating Temperature** | -55℃ to +135℃ |

| **Soft & Flexible** | Soft material; tightly conforms to cables after shrinking |

| **Multiple Printing Methods** | Supports thermal transfer and dot matrix printing; compatible with various label printers |

 

**Specifications**

| Parameter | Typical Value |

| Shrink Ratio | 2:1, 3:1 |

| Initial Shrink Temperature | ≥70℃ |

| Full Shrink Temperature | ≥120℃ |

| Operating Temperature | -55℃ to +135℃ |

| Tensile Strength | ≥10.4 MPa |

| Elongation at Break | ≥200% |

| Dielectric Strength | ≥15kV/mm |

| Volume Resistivity | ≥10¹⁴ Ω·cm |

| Flame Rating | VW-1 |

| Standard Colors | White, Yellow |

 

**Comparison with PVC Marker Tubing**

 

| Comparison | **Heat Shrink Marker** | PVC Marker Tubing |

| Material | Irradiated crosslinked polyolefin | Flexible PVC |

| Fixing Method | Heat shrink – tight fit | Internal tooth grip – may slide |

| Fixing Performance | Excellent – no slipping | Good – internal tooth lock |

| Temperature Range | -55℃ to +135℃ | -55℃ to +105℃ |

| Oil/Solvent Resistance | Excellent | Good |

| Flame Rating | VW-1 | VW-1 |

| Printing | Dual-sided, multi-line, logos | Single-sided |

| Certifications | MIL-spec, aerospace available | General industrial |

| Best For | High reliability, harsh environments, permanent ID | General wiring, quick installation |

 

*Selection Guide**: Choose **Heat Shrink Marker** for permanent identification, high reliability, and harsh environments. Choose **PVC Marker Tubing** for quick installation without heating.

 

**Key Advantages**

**1. Permanent Identification – Core Value**

 

The core value of heat shrink identification tubing is “permanent marking.” Printed characters remain clear and wear-resistant even after friction or exposure to harsh solvents and oils. This distinguishes it from traditional labels or spray marking methods and represents a revolutionary advancement in identification technology.

 

**2. Excellent Color Code Durability**

 

The durability of printed codes is a key indicator of quality:

– **Abrasion Resistance**: Remains legible after multiple eraser tests

– **Solvent Resistance**: Resists oils and chemical solvents

– **Aging Resistance**: No fading or peeling after long-term use

 

**3. Flexible Printing Content**

 

– Supports Chinese, English, numbers, electrical symbols, and special symbols

– Dual-sided printing for enhanced readability

– Supports logo and pattern printing

– Multiple cutting options: solid line, dashed line, auto-half cut

 

**4. High Reliability Certifications**

 

Heat shrink identification tubing meets high-reliability requirements for demanding applications:

– Meets AMS-DTL-23053/5 military specification

– Suitable for aerospace, rail transportation, and military applications

 

**5. Easy Installation**

Using a heat gun or oven, the tubing quickly shrinks and tightly conforms to the cable. When used with a label printer, on-site printing and installation is highly efficient.

Permanent Identification – Core Value