AEI SX744:CM488

Category: MDPE , Medium Density Polyethylene
Manufacturer: AEI Compounds Limited
Trademark: AEI
Fillers: -
Ports: Qinzhou, Shekou, Shanghai, Ningbo
Delivery Terms FOB, CIF, DAP, DAT, DDP
PDF: 7wgzag_AEI-SX744-CM488.pdf
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Silane crosslinkable medium density polyethylene for high temperature pressure pipes

Material SX744 is a silane grafted MDPE compound, curable by exposure to moist conditions, and possessing good extrusion properties at high output rates. The graft component SX744 is mixed with a crosslinking catalyst masterbatch CM488 generally in the ratio 95:5.

The highly crosslinked materials produced by the two-component system possess excellent impact strength, ESCR, creep and internal pressure resistance under ambient and elevated temperature conditions.

These materials have been formulated for hot and cold water pressure pipes and are easily extrudable on conventional polyethylene extrusion lines.
General Information
Features
  • High ESCR (Stress Cracking Resistance)
  • Impact resistance, high
  • Crosslinkable
  • Good creep resistance
Uses
  • Piping system
Agency Ratings
  • DIN 16892
  • EC 1907/2006 (REACH)
RoHS Compliance
  • RoHS compliance
Forms
  • Particle
Processing Method
  • Pipeline extrusion molding
  • Extrusion
PhysicalNominal ValueUnitTest Method
Density 0.941g/cm³BS 2782 620A
Melt Mass-Flow Rate (MFR) (190°C/2.16 kg)1.3g/10 minInternal method
Gel Content 72%ASTM D2765
ThermalNominal ValueUnitTest Method
Thermoset 1IEC 60811-2-1
    Elongation under load, 20N/cm² : 200°C 55%IEC 60811-2-1
    Permanent elongation after cooling 0.0%IEC 60811-2-1
ExtrusionNominal ValueUnit
Head Temperature 200°C
Extruder Screw L/D Ratio 20.0:1 to 25.0:1
Extruder Screw Compression Ratio 2.5:1 to 3.0:1
MechanicalNominal ValueUnitTest Method
Tensile Modulus - 1% Secant 650MPaBS 2782 320A
Tensile Stress 24.0MPaIEC 60811-1-1
Tensile Strain (Break)550%IEC 60811-1-1
Additional Information
Crosslinking or cure: If properly processed the material has the capacity of crosslinking under ambient conditions.Should accelerated cure times be required, then any of the following methods may be employed. Immersion in water at 80°C Flushing with water at 80°C Exposure to steam at 90°C (as in a sauna)
ExtrusionNominal ValueUnit
Cylinder Zone 1 Temp. 140°C
Cylinder Zone 2 Temp. 160°C
Cylinder Zone 3 Temp. 175°C
Cylinder Zone 4 Temp. 190°C
Die Temperature 200°C
Note Message
1 .Cure assessment by hot set test (forced cured at 80°C in water)
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