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PMMA
PMMA LX MMA KOREA HI-855S
Impact resistant grade
thermal performanceTest ConditionTest MethodLX MMA KOREA/HI-855S
melt mass-flow rate230°C,3.8kgASTM D-12385.5 g/10min
specific heatcal/g/°C0.35
UL flame retardant rating1/8",1/16"UL 94HB
Vicat softening temperature1kgASTM D-152590 °C
Shrinkage rateASTM D995-510.4-0.8 %
Coefficient of sponge expansioncm/cm/°CASTM D-6966×10
heat conductionASTM D-1775×10 cal/seccm·°C/cm
Hot deformation temperature18.56kgASTM D-64888 °C
Electrical performanceTest ConditionTest MethodLX MMA KOREA/HI-855S
Dielectric strength4KV/SASTM D-14915 KV/mm
Dissipation factor60HzASTM D-1500.04
Volume resistivityASTM D-257>15 Ω.m
Dielectric constant60HzASTM D-1503.9
mechanical propertiesTest ConditionTest MethodLX MMA KOREA/HI-855S
Impact strength of cantilever beam gapIzod NotchedASTM D-2564.5 kg·cm/cm
Rockwell hardnessM-ScaleASTM D-78560
Elongation at BreakASTM D-63830 %
bending strengthASTM D-790900 kg/cm
Bending modulusASTM D-79023.000 kg/cm
tensile strengthASTM D-638500 kg/cm
Basic PerformanceTest ConditionTest MethodLX MMA KOREA/HI-855S
Water absorption rate24hASTM D-5700.4 %
Physical propertiesTest ConditionTest MethodLX MMA KOREA/HI-855S
transparency3.2mmASTM D-100391 %
reflectivityASTM D-5421.49

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