Knowde Enhanced TDS
Identification & Functionality
- Additives Included
- Chemical Family
- Polymer Name
- Plastics & Elastomers Functions
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- Materials Features
- 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
- Applications
- Cure Method
- Plastics & Elastomers End Uses
- Plastics & Elastomers Processing Methods
Properties
- Physical Form
- Physical Properties
- Mechanical Properties
- Flammability
Value | Units | Test Method / Conditions | |
Conductivity of Gases | 0.128 | μs/mm | IEC 60754-2 |
pH Value (Combustion Gases) | 5.72 | — | IEC 60754-2 |
Degree of Cross-linking | 77 | % | ASTM D2765 |
Dielectric Breakdown (at Initial) | min. 39 | kV | UL 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) | 110 | Mꭥ-1000ft. | UL 1581 UL 2556 |
Insulation Resistance (Initial at 90°C) | 1400 | Mꭥ-1000ft. | UL 1581 UL 2556 |
Relative Permittivity (at 90°C / 60Hz) | 337 | % | UL 1581 / UL 2556 |
Retention After Glancing Impact | 81 | % | UL 1581 UL 2556 |
Insulation Resistance (at 15°C) | 9000 | Mꭥ-1000ft. | UL 1581 UL 2556 |
Specific Gravity (at 23°C) | 1.29 | g/cm³ | ASTM D792 |
Value | Units | Test Method / Conditions | |
Crushing Test | min. 1400 | lbs | UL 1581 / UL 2556 |
Deformation | max. 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 Break | 270 | % | UL1581 UL 2556 |
Elongation at Break (After Thermal Aging: 7 Days at 121°C) | 240 | % Retention | UL1581 UL 2556 |
Limiting Oxygen Index | 34 | % Oxygen | ASTM D2863 |
Shrinkback | 0 | mm | UL 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) | psi | UL 1581 UL 2556 |
Tensile Strength (After Thermal Aging: 7 Days at 121°C) | 2470 | psi | UL1581 UL 2556 |
Elongation (After Oil: 96 Hours at 100°C) | 235 (87) | % Retention | UL 1581 UL 2556 |
Tensile Strength at Break | 2090 | psi | UL1581 UL 2556 |
Elongation at Break (After Oil: 60 Days at 75°C) | 270 (100) | % Retention | UL 1581 UL 2556 |
Low Temperature Properties Cold Impact (at -40°C) | Pass | No Cracks | UL 1581 UL 2556 |
Tensile Strength at Yield | 2115 | psi | UL1581 UL 2556 |
Low Temperature Properties Cold Bend (at -40°C) | Pass | No Cracks | UL 1581 UL 2556 |
Value | Units | Test Method / Conditions | |
Flame Resistance (FT2) | Pass | — | UL 1581 UL 2556 |
Flaming Avg. Ds (After 4 min) | max. 1 | — | ASTM E662 |
Flame Resistance (VW-1) (#10 up) | Pass | — | UL 1581 UL 2556 |
Non-Flaming Avg. Ds (After 4 min) | max. 2 | — | ASTM E662 |
Flaming Avg. Dm (Corrected) | max. 50 | — | ASTM E662 |
Non-Flaming Avg. Ds After 4 min | max. 2 | — | ASTM E662 |
Non-Flaming Dm (Corrected) | max. 70 | — | ASTM 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