PEXIDAN® HF X/T

1 of 49 products in this brand

PEXIDAN® HF X/T is a unique low smoke halogen free flame retardant 90°C wet-rated XL-insulation system curable by moisture. It consists of a silane pre-grafted base compound SX651 and a catalyst masterbatch CM540U. Mixed and extruded in the proper proportions (95:5), the two components result in a material that is crosslinkable by exposure to 90°C hot water. PEXIDAN® HF X/T is REACH and RoHS-compliant and is UL 2885 certified to bear the Halogen Free “HF” designation. PEXIDAN® HF X/T is UL-bulletinized and wire made with this insulation system may be marked as Oil Resistant “PR I” and “PR II”, Gas & Oil Resistant “GR I” and “GR II”, “-40C” and “SUNRES” in all colors. This compound will meet a 105°C dry rating.

Polymer Name: Crosslinked Polyethylene (XLPE / PEX)

Processing Methods: Extrusion

End Uses: Building Materials, Building Wire Insulation, Cables, Low Voltage Insulation, Wires

Density: 1290.0 - 1290.0 kg/m³

Technical Data Sheet

Knowde Enhanced TDS

Identification & Functionality

Additives Included
Plastics & Elastomers Functions
Technologies

Features & Benefits

Labeling Claims
Key Characteristics

Moisture-curable Low Smoke Zero-Halogen (LSZH) insulation compound for low-voltage building wire applications (UL styles XHHW-2, RHW-2, RHH, and SIS)

Applications & Uses

Cure Method
Plastics & Elastomers Processing Methods

Properties

Physical Form
Physical Properties
ValueUnitsTest Method / Conditions
Conductivity of Gases0.128μs/mmIEC 60754-2
pH Value (Combustion Gases)5.72IEC 60754-2
Degree of Cross-linking77%ASTM D2765
Dielectric Breakdown (at Initial)min. 39kVUL 1581 UL 2556
Dielectric Constant (at 100 MHz)2.98 (0.0027)ASTM D150
Dielectric Constant (at 500 MHz)3.31 (0.0052)ASTM D150
Insulation Resistance (After 12 Weeks at 90°C)110Mꭥ-1000ft.UL 1581 UL 2556
Insulation Resistance (Initial at 90°C)1400Mꭥ-1000ft.UL 1581 UL 2556
Relative Permittivity (at 90°C / 60Hz)337%UL 1581 / UL 2556
Retention After Glancing Impact81%UL 1581 UL 2556
Insulation Resistance (at 15°C)9000Mꭥ-1000ft.UL 1581 UL 2556
Specific Gravity (at 23°C)1.29g/cm³ASTM D792
Mechanical Properties
ValueUnitsTest Method / Conditions
Crushing Testmin. 1400lbsUL 1581 / UL 2556
Deformationmax. 15%UL 1581 UL 2556
Elongation Under Load (Hot Elongation Test: 15 at 150°C, 0.2 N/mm² Load)max. 35%SACO AEI DWI-QA-4007 based on ICEA T-28-562
Elongation at Break270%UL1581 UL 2556
Elongation at Break (After Thermal Aging: 7 Days at 121°C)240% RetentionUL1581 UL 2556
Limiting Oxygen Index34% OxygenASTM D2863
Shrinkback0mmUL 1581 UL 2556
Tensile Strength (After Oil: 60 Days at 75°C)1860 (90)psi (%)UL1581 UL 2556
Tensile Strength (After Oil: 96 Hours at 100°C)1807 (87)psiUL 1581 UL 2556
Tensile Strength (After Thermal Aging: 7 Days at 121°C)2470psiUL1581 UL 2556
Elongation (After Oil: 96 Hours at 100°C)235 (87)% RetentionUL 1581 UL 2556
Tensile Strength at Break2090psiUL1581 UL 2556
Elongation at Break (After Oil: 60 Days at 75°C)270 (100)% RetentionUL 1581 UL 2556
Low Temperature Properties Cold Impact (at -40°C)PassNo CracksUL 1581 UL 2556
Tensile Strength at Yield2115psiUL1581 UL 2556
Low Temperature Properties Cold Bend (at -40°C)PassNo CracksUL 1581 UL 2556
Flammability
ValueUnitsTest Method / Conditions
Flame Resistance (FT2)PassUL 1581 UL 2556
Flaming Avg. Ds (After 4 min)max. 1ASTM E662
Flame Resistance (VW-1) (#10 up)PassUL 1581 UL 2556
Non-Flaming Avg. Ds (After 4 min)max. 2ASTM E662
Flaming Avg. Dm (Corrected)max. 50ASTM E662
Non-Flaming Avg. Ds After 4 minmax. 2ASTM E662
Non-Flaming Dm (Corrected)max. 70ASTM E662

Regulatory & Compliance

Certifications & Compliance

Technical Details & Test Data

Processing

The pre-grafted SX651 must be extruded with type CM540U catalyst masterbatch in the proportion of 95:5 by weight. We suggest dosing the two components directly in the hopper of the extruder using a gravimetric or loss-in-weight feeder. In order to prevent scorching the grafted compound and the catalyst masterbatch must be stored separately and mixed just prior to consumption. PEXIDAN® HF X/T can be processed with a single screw extruder having proper temperature control and a low compression metering screw. Substitution of the breaker plate and screens with a spacer ring that provides full-flow cross-section is also recommended. Pressure tooling should have short land and narrow gum space (see below). This system may also be used with alternate catalyst CM540U/1 to optimize cure rates and processibility for given equipment.
The following temperature profile and equipment parameters are suggested:

  Barrel Zones Head Die
Celsius 154°-171°C 177°C 179°C
Fahrenheit 310°-340°F 350°F 355°F

Screw Design - 1.2:1 compression ratio (up to maximum of 1.8:1) metering screw designed for LSZH compounds

Tooling Design - Pressure - on-size double-angle or short-land single-angle die with gum space < 2x wall thickness Tubing - doubleangle die having DDR of approximately 1.5 and DRB close to 1.0 These conditions may depend on the equipment being used. It is recommended using conveyors and tools shaped in order to prevent stagnation in the head. In case of prolonged shutdown, purge the extruder with LDPE.

Curing - Curing can be done by immersion in hot water at 90°C, or by exposure to low pressure steam. In all cases curing time depends on wall thickness, temperature, relative humidity and quantity of wire on the reel.

Color Masterbatch - - A wide range of commonly-used color masterbatches based on LDPE are available. A use level of 0.5% by weight should give an acceptable color but this will be dependent upon the concentrate itself. Levels of concentrates should be kept to a minimum because they can detract from performance. It is recommended that the catalyst CM540U and all color masterbatches be dried prior to usage for 4-6 hours at 150°F (60°C) using a desiccant dryer. When using color masterbatch in an outdoor (SUNRES) application, it is important to select a masterbatch that will remain color-fast and not fade when outdoor weathered, that is a masterbatch in which the pigment is UV stable. SACO recommends consulting your color masterbatch supplier for guidance

Packaging & Availability

Packaging Information

The physical form of both SX651 and CM540U is free-flowing pellets, and both are available in gaylords, 125-kg (275-lb) cubes, or 25-kg (55-lb) sacs.

Storage & Handling

Storage

Due to the moisture sensitivity of SX651 it is packaged in a heat-sealed moisture-impervious liner. SACO AEI Polymers suggests that the following points should be considered when storing the materials:

Other precautions are:

  • Packaging should remain sealed
  •  Avoid temperature above 30°C
  • Avoid storage outside and in direct sunlight
  • Use within 8 hours of opening packaging