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LG Chemical EG920 PMMA, General Purpose Grade for Extrusion  (discontinued **)
Categories: Polymer; Thermoplastic; Acrylic (PMMA); Acrylic, Extruded
Material Notes:
  • General purpose grade with excellent stress cracking resistance
  • Intended mainly for exterior applications
  • Recommended mainly for sheets, pipes, and profiles
Features:
  • Excellent transparency and elegance
  • Weather resistance and chemical resistance
  • Surface hardness and coloring property
  • Superior electrical resistance and mechanical properties
  • No harm caused

Applications:

  • Automotive Parts:
    • Rear lamp cover
    • Turn signal lamp cover
    • Indoor lamp cover
    • Rear quarter glass
    • Automotive badge
  • Electric or Electronic Parts:
    • LCD light guide plate
    • Microwave oven door/front panel
    • Cassette door
    • VCR cover/front panel
    • Car stereo panel
    • Dial scale
    • Light pipe
  • Sheet:
    • Signboard
    • Showcase
    • Light dome
    • Aquarium
    • Picture frame
  • Lighting and Miscellaneous:
    • Solid surface
    • Lighting cover
    • Ornaments
    • Watch crystal
    • Optical lens
    • Piano keyboard

Information Provided by LG Chem
Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesOriginal ValueComments
Specific Gravity 1.18 g/ccASTM D792
Water Absorption 0.30 %24 hours; ASTM D570
Linear Mold Shrinkage 0.0020 - 0.0060 cm/cmASTM D955
Melt Index of Compound 1.7 g/10 min
@Load 3.80 kg,
Temperature 230 °C		ASTM D1238
 
Mechanical PropertiesOriginal ValueComments
Hardness, Rockwell M 98ASTM D785
Tensile Strength at Break 74.0 MPaASTM D638
Elongation at Break 13 %ASTM D638
Flexural Strength 137 MPaASTM D790
Flexural Modulus 3.275 GPaASTM D790
Izod Impact, Notched 14.7 J/mASTM D256
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 1.00e+15 ohm-cmASTM D257
Dielectric Constant 4.0
@Frequency 60 Hz		ASTM D150
Dielectric Strength 20.0 kV/mm4kV/s; ASTM D149
Dissipation Factor 0.050
@Frequency 60 Hz		ASTM D150
 
Thermal PropertiesOriginal ValueComments
CTE, linear 60.0 µm/m-°C
@Temperature 20.0 °C		ASTM D696
Deflection Temperature at 1.8 MPa (264 psi) 102 °CASTM D648
Vicat Softening Point 112 °C1 kg; ASTM D1525
 
Optical PropertiesOriginal ValueComments
Refractive Index 1.49ASTM D542
Haze 0.50 %
@Thickness 3.20 mm		ASTM D1003
Transmission, Visible 93 %
@Thickness 3.20 mm		ASTM D1003
 
Processing PropertiesOriginal ValueComments
Processing Temperature 240 - 270 °CInjection molding cylinder temperature
Mold Temperature 70.0 - 90.0 °C
Drying Temperature 70.0 - 80.0 °C
Dry Time 4 - 6 hour
Injection Pressure 78.45 - 147.1 MPa
Annealing Temperature 80.0 - 90.0 °C3-5 hours

**
Materials flagged as discontinued () are no longer part of the manufacturer’s standard product line according to our latest information. These materials may be available by special order, in distribution inventory, or reinstated as an active product. Data sheets from materials that are no longer available remain in MatWeb to assist users in finding replacement materials.

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LG Chemical IH830 PMMA, General Purpose Grade for Injection Molding

PLGCHEM245 / 51066

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