Compound D2-I

Radiation crosslinkable polyester elastomeric compound for flexible high grade, diesel fuel and hydraulic fluid resistant 150ºC heat-shrinkable tubing.

Compound properties

Compound D2-I is a radiation crosslinkable compound offering excellent chemical resistance, flexibility , flame-retardancy and high temperature resistance properties. The specially selected combination of elastomers, flame-retardants , processing aids and additives makes this compound an excellent choice for the manufacturing of heat-shrinkable tubings which will easily meet the requirements of MIL-DTL-23053/16, DEF 59-97 Issue 3 Type 6B and VG 95343 Part 5 Type D.
The compound is easy processable at high speeds with minimal melt fracture and can be extruded on standard PE or PVC extruders.

Compound characteristics

Color Black
Specific gravity ASTM D 792 1.4
Water absorption ASTM D 570 0.15%
MFI (160ºC, 21.6kg) ASTM D 1238 7
LOI ASTM D 2868 28%

Extrusion

Recommended extrusion temperature profile 145ºC - 150ºC - 155ºC - 160ºC - 165ºC

Crosslinking

Recommended dose 250 kGy
Hot-set elongation 125 - 175 % (180ºC and 35 gr/mm2 load)

Packaging

The compound is packed in sealed PE bags of 25 kg.
We recommend to store the compound below 30ºC.

Tubing properties

Heat-shrinkable tubing made of this compound will show a continuous operating temperature of 150ºC. The excellent heat-ageing properties allows the product to withstand 200ºC for short periods. The high chemical resistance against a wide range of fluids and the extreme flexibility makes this compound an excellent choice for applications such as cable harnesses in the automotive, aerospace, military and chemical industry.

Technical values

Property Test Method Typical value
 
Physical
Tensile strenght at break ASTM D 638 17 MPa
Elongation at break ASTM D 638 500%
Secant modulus (2% elongation) ASTM D 638 35 MPA
Shore hardness ASTM D 2240 90 Shore A, 40 Shore D
 
Thermal
Continuous operating temperature   -55ºC to +150ºC
Minimum shrink temperature   120ºC
Heat shock (4hrs @ 250ºC) ASTM D 2671 No cracking, dripping, flowing
Heat ageing (168hrs @ 150ºC) ASTM D 638 Elongation 300%
Low temp. flexibility (-55ºC) ASTM D 2671C No cracking
Flammability ASTM D 2671 Self-extinguising
 
Chemical
Fungus resistance MIL-DTL-7444 Inert
Fluid resistance MIL-DTL-23053/16 Excellent
Copper Corrosion ASTM D 2671 B Excellent
 
Electrical
Dielectric strength ASTM D 2671 12 kV/mm
Volume resistivity ASTM D 257 10 @ 13 ohm.cm

International specifications

- MIL-DTL-23053/16
- DEF STD 59-97 Iss. 3 Type 6B
- VG 95343 Part 5 Type D
 
 
 

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