Stress Control and Insulation Tubes
C105 Semi Conductive and Insulation Double Layer Heat Shrink Tube
Co extruded heavy wall tube that restores insulation and the outer semiconductive screen in one operation up to 36 kV
- Operating temperature: -55 to 105°C
- Minimum fully recovery temperature: 135°C
- Halogen-free, RoHS compliant, Heavy wall
- Semi-conductive / insulation double layer co-extrusion
- Standard Color: Black (outer layer) / Red (inner layer)
- shrink ratio 2.5:1 to 2:1
C105 · Stress Control and Insulation Tubes
Product Overview
What C105 Does
Co-extrusion design,semi-conductive/insulation double layer heat shrink tube.Suitable for insulation protection of power cable joint under 36kV.
Co extruded heavy wall tube that restores insulation and the outer semiconductive screen in one operation up to 36 kV It is manufactured by Dalian United Polymer Material Co., Ltd. in Dalian China where radiation cross linking extrusion and molding are all performed in house under one quality system.
Key Benefits
- Two functional layers applied in a single shrink operation which cuts joint build time
- No manufactured on site interface between insulation and screen so voids are eliminated
- Inner insulation with dielectric strength of 15 kV/mm or higher and volume resistivity of 1.0×10¹³ Ω·cm or higher
- Nine sizes from 38/13 mm to 115/50 mm covering the full MV joint range
- A functional alternative to TE Raychem CICM
Who It Is For
Who Benefits Most from C105
The buyers and site teams this product was designed around
MV Joint Kit Manufacturers
The insulation and screen restoration in an MV joint is the layer that decides whether the joint passes a type test.
Utility Jointing Crews
Teams who need to rebuild insulation and screen on a joint without stacking four separate tubes.
Wind and Solar Collector Contractors
Field joints on collector cable where installation time in a tower base or trench is limited.
Cable Manufacturers and Repair Shops
Factory repair of a damaged core during drum production or reel testing.
Problems It Solves
Problems This Product Removes
Every one of these is a failure mode we have seen on real networks
Building a Joint One Layer at a Time Is Slow and Error Prone
Each separate tube adds a chance of trapped air a misaligned overlap or a burn. C105 puts insulation and the outer semiconductive screen into one co extruded wall.
Interface Voids Between Layers Cause Partial Discharge
Co extrusion bonds the semiconductive layer to the insulation during manufacture so there is no interface to trap air on site.
The Outer Screen Must Be Genuinely Conductive
The black outer layer has volume resistivity of 1.0×10⁴ Ω·cm or below so it functions as a real screen not a cosmetic coating.
Heavy Wall Tubes Are Hard to Shrink Evenly
Recovered wall thickness of 5 to 6.3 mm is designed to recover at 135 °C so a normal torch achieves full recovery without scorching.
Application Scenarios
Where It Is Used
MV Straight Through Joints
Restoring insulation and outer screen across a jointed conductor up to 36 kV.
Transition Joints
Joining cables of different construction where insulation thickness must be rebuilt.
Factory Core Repair
Repairing a damaged core in a cable works before the cable is shipped.
Collector Circuit Field Joints
Fast joint builds in wind farm and solar trenches.
Training and Qualification Samples
Teaching jointers a clean repeatable joint build sequence.
Technical Data
Specifications and Dimensions
Test methods and requirements taken directly from the manufacturing specification
Technical Data
| Property | Test Method | Requirement |
|---|---|---|
| Outer Layer (Semi-Conductive, Black) | ||
| Tensile Strength | ASTM D2671 | ≥12 MPa |
| Ultimate Elongation | ASTM D2671 | ≥270% |
| Heat Aging (158°C/168h) Tensile Strength Ultimate Elongation | ASTM D2671 | ≥10 MPa ≥250% |
| Water absorption (23°C/24h) | ASTM D2671 | ≤0.5% |
| Low-temperature flexibility (-40°C/4h) | ASTM D2671 | No cracking |
| Heat shock (200°C/4h) | ASTM D2671 | No dripping or flowing |
| Volume resistivity | ASTM D2671 | ≤1.0×104 Ω·cm |
| Inner Layer (Insulation, red) | ||
| Tensile Strength | ASTM D2671 | ≥12 MPa |
| Ultimate Elongation | ASTM D2671 | ≥350% |
| Heat Aging (136°C/168h) Tensile Strength Ultimate Elongation | ASTM D2671 | ≥10 MPa ≥270% |
| Water absorption (23°C/24h) | ASTM D2671 | ≤0.5% |
| Low-temperature flexibility (-40°C/4h) | ASTM D2671 | No cracking |
| Heat shock (200°C/4h) | ASTM D2671 | No dripping or flowing |
| Dielectric strength | ASTM D2671 | ≥15 kV/mm |
| Volume resistivity | ASTM D2671 | ≥1.0×1013 Ω·cm |
Dimensions
| Size C105 | As supplied(mm) Inner diameter D (min.) | After recovered (mm) Inner diameter d (max.) | Wall thickness t (nom.) | Standard length (m/pcs) |
|---|---|---|---|---|
| 38/13 | 38 | 13 | 5 | ≤1.22 |
| 45/17 | 45 | 17 | 5.5 | ≤1.22 |
| 50/20 | 50 | 20 | 5.5 | ≤1.22 |
| 55/23 | 55 | 23 | 5.5 | ≤1.22 |
| 65/25 | 65 | 25 | 6 | ≤1.22 |
| 75/30 | 75 | 30 | 6 | ≤1.22 |
| 85/35 | 85 | 35 | 6 | ≤1.22 |
| 95/40 | 95 | 40 | 6.2 | ≤1.22 |
| 115/50 | 115 | 50 | 6.3 | ≤1.22 |
CROSS REFERENCE · Tyco-Raychem: CICM
Manufacturing and Quality
How It Is Made and Checked
Compounding extrusion radiation cross linking expansion and test all under one roof in Dalian
-
01
Compounding
Base polyolefin antioxidants flame retardants and functional fillers are mixed to a recipe held under our own formulation control rather than bought as a masterbatch.
-
02
Extrusion
The compound is extruded to the required wall and diameter. Co extruded products form two or three layers in a single pass so no interface can trap air.
-
03
Radiation Cross Linking
Electron beam irradiation creates the cross linked network that gives the material its shape memory. This step is what makes the product heat shrinkable.
-
04
Expansion
The cross linked part is heated expanded to its supplied diameter and cooled under tension so the expanded shape is locked in until heat is applied again.
-
05
Test and Inspection
More than 90 percent of product performance tests are carried out in our own laboratory including tensile elongation heat aging dielectric strength and tracking resistance.
-
06
Packing and Traceability
Each batch carries a production record so a delivered part can be traced back to its compound lot and process parameters.
Certification
ISO 9001:2015
Quality management system
IATF 16949:2016
Automotive quality management
ISO 14001:2015
Environmental management
ISO 45001:2018
Occupational health and safety
GJB 9001C-2017
Defence quality management
UL 224 E341796
Extruded insulating tubing
CE / RoHS
European conformity and restricted substances
CCS / ABS / DNV
Marine classification society approvals
Comparison
How C105 Compares
An honest comparison so you can rule this product in or out quickly
| Build Method | Layers Applied | Void Risk | Build Time |
|---|---|---|---|
| C105 co extruded double layer | One operation | Low | Fastest |
| C106 tri layer | One operation | Lowest | Fast |
| Separate insulation plus screen tubes | Two or more operations | Higher | Slower |
| Tape build up | Many | Highest | Slowest |
Use Guide
How to Select and Install C105
The sequence our engineers walk customers through on every first installation
-
01
Confirm Orientation
The black semiconductive layer must end up on the outside and the red insulation on the inside. Check before sliding the tube into position.
-
02
Park the Tube Before Jointing
Slide the tube well down the cable before the conductor connector is made so it can be pulled back over the finished joint.
-
03
Size for the Connector
The supplied diameter D must clear the largest point on the connector. The recovered diameter d must be smaller than the cable core.
-
04
Centre over the Joint
Position the tube so it overlaps the cable insulation evenly on both sides of the connector.
-
05
Shrink from the Centre Out
Heat from the middle toward each end so air is expelled from both sides. Recovery needs 135 °C so keep the flame moving and be patient with the heavy wall.
-
06
Bond the Screen
Restore metallic screen continuity over the semiconductive layer with braid and constant force springs then seal the joint with an outer adhesive lined tube.
FAQ
C105 Frequently Asked Questions
The questions buyers ask before they place an order
What does co extrusion mean and why does it matter
How conductive is the black outer layer
Is C105 a substitute for Raychem CICM
What is the maximum length available
When should I choose C106 instead
What temperature is needed for full recovery
Still need an answer ask our engineers on WhatsApp
Related
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C101 Non Tracking Tube
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VIEW DETAILSGet a Quotation for C105
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