Lumiplas® LD7550

About
Description Light diffusion Application (LED) Lamp cover, Signboard Lighting decoration of electronic device&&

Product Description
SupplierLG Chemical
GenericPolycarbonate
Material StatusCommercial: Active
FeaturesLow Light Diffusion,V-2
AvailabilitysNorth America,Latin America,Asia Pacific,Europe
Process MethodsExtrusion

Technical Data
PHYSICALNominal valueUnitTest method
Density1.20g/cm³ASTM D792
Melt Flow Rate
300℃,1.20kg11g/10minASTM D1238
Shrinkage rate
MD:3.2 mm0.50 to 0.80%ASTM D955

IMPACTNominal valueUnitTest method
Impact strength of cantilever beam notch
23℃,3.2mm780J/mASTM D256

THERMALNominal valueUnitTest method
Hot deformation temperature
1.8 MPa, unannealed, 6.4 mm130ASTM D648
Linear coefficient of thermal expansion
MD6.8E-51/℃ASTM D696
Relative temperature index
Electrical performance80.0UL 746
Strength mechanical performance80.0UL 746
Impact mechanical performance80.0UL 746

FLAME CHARACTERISTICSNominal valueUnitTest method
Flame retardant level UL 94
0.80 mmV-2 UL 94
1.60 mmV-2 UL 94

Supplementary informationNominal valueUnitTest method
Transparency(1.00 mm)57%JIS K7361

MECHANICALNominal valueUnitTest method
tensile strength
Fracture, 3.20 mm61.8MPaASTM D638
Tensile strain
Fracture, 3.20 mm> 100%ASTM D638
Bending modulus
6.40 mm2260MPaASTM D790
bending strength
Yield, 6.40 mm93.2MPaASTM D790
Rockwell hardness
R-level118 ASTM D785

Process Conditions
injectionNominal valueUnitTest method
ExtrusionNominal valueUnitTest method
Drying temperature100 to 200°C
Drying time3.0 to 4.0hr
Minimum Moisture Content0.020%
Barrel rear temperature260 to 280°C
Barrel middle temperature280 to 300°C
Barrel front temperature290 to 310°C
Nozzle temperature290 to 310°C
Processing (melt) temperature300 to 320°C
Mold temperature80 to 120°C
Back pressure0.981 to 3.92MPa
Screw speed40 to 70rpm
Drying temperature100 to 120°C
Drying time3.0 to 4.0hr
Barrel 1 zone temperature260 to 280°C
Barrel 2 zone temperature270 to 300°C
Barrel 3 zone temperature270 to 300°C
Barrel 4 zone temperature270 to 300°C
Connector temperature280 to 300°C
Melt temperature300 to 320°C
Nozzle temperature260 to 295°C

Notes
1. Typical properties: these are not to be construed as specifications.
2. 2.0 in/min
3. 0.59 in/min
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