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 Polystyrene (PS) Processing Information
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Properties
PS (EPS)
PS (GPPS)
PS (HIPS)
PS (IRPS)
PS (MIPS)
PS (Specialty)
PS Alloy
PS+PE
PS+SPS
SPS
Density (g/cm³)0.0125 to 0.6751.02 to 1.061.03 to 1.061.06 to 1.181.041.02 to 1.161.03 to 1.270.0200 to 1.021.03 to 1.151.01 to 1.44
Mold Shrinkage, Flow (in/in)--0.0038 to 0.00600.0045 to 0.00610.0040 to 0.00550.0040 to 0.00700.0040 to 0.00600.0030 to 0.0100.00450.0050 to 0.00700.0030 to 0.020
Melt Mass Flow Rate (g/10 min)--0.20 to 200.50 to 147.6 to 102.0 to 142.7 to 152.0 to 114.0 to 4.5----
Drying Temperature (°F)--157 to 180158 to 182158158 to 170158 to 167180--158 to 176176
Drying Time (hr)--1.5 to 2.01.5 to 2.02.01.5 to 2.01.5 to 2.02.0--3.0 to 4.03.5
Suggested Max Moisture (%)--0.0200.10--------------
Suggested Max Regrind (%)--20 to 30302530----------
Injection Pressure (psi)--4350 to 225004100 to 225001100015200 to 225001250012500------
Rear Temperature (°F)--320 to 456336 to 456380356 to 400338 to 435430--464 to 500518
Middle Temperature (°F)--372 to 455374 to 480420383 to 410383 to 384430--482 to 518536
Front Temperature (°F)--402 to 451388 to 520440401 to 450406 to 410430--500 to 518554
Nozzle Temperature (°F)--400 to 444418 to 445440392 to 428392 to 393----500 to 518554
Processing (Melt) Temp (°F)--417 to 453406 to 480419 to 482379 to 446426 to 428419 to 445--518 to 572590
Mold Temperature (°F)--86.0 to 14085.0 to 142122 to 14090.0 to 140113 to 122124 to 126--122 to 149158

SI
Properties
PS (EPS)
PS (GPPS)
PS (HIPS)
PS (IRPS)
PS (MIPS)
PS (Specialty)
PS Alloy
PS+PE
PS+SPS
SPS
Density (g/cm³)0.0125 to 0.6751.02 to 1.061.03 to 1.061.06 to 1.181.041.02 to 1.161.03 to 1.270.0200 to 1.021.03 to 1.151.01 to 1.44
Mold Shrinkage, Flow (cm/cm)--0.0038 to 0.00600.0045 to 0.00610.0040 to 0.00550.0040 to 0.00700.0040 to 0.00600.0030 to 0.0100.00450.0050 to 0.00700.0030 to 0.020
Melt Mass Flow Rate (g/10 min)--0.20 to 200.50 to 147.6 to 102.0 to 142.7 to 152.0 to 114.0 to 4.5----
Drying Temperature (°C)--69.4 to 82.269.9 to 83.169.8 to 70.070.0 to 76.770.0 to 75.282.2--70.0 to 80.080.0
Drying Time (hr)--1.5 to 2.01.5 to 2.02.01.5 to 2.01.5 to 2.02.0--3.0 to 4.03.5
Suggested Max Moisture (%)--0.0200.10--------------
Suggested Max Regrind (%)--20 to 30302530----------
Injection Pressure (MPa)--30.0 to 15528.3 to 15575.8105 to 15586.286.0 to 86.4------
Rear Temperature (°C)--160 to 236169 to 235193180 to 204170 to 224221--240 to 260270
Middle Temperature (°C)--189 to 235190 to 249216195 to 210195 to 196221--250 to 270280
Front Temperature (°C)--206 to 233198 to 271227205 to 232208 to 210221--260 to 270290
Nozzle Temperature (°C)--204 to 229215 to 229227200 to 220200----260 to 270290
Processing (Melt) Temp (°C)--214 to 234208 to 249215 to 250193 to 230219 to 220215 to 229--270 to 300310
Mold Temperature (°C)--30.0 to 60.229.4 to 61.150.0 to 60.032.2 to 60.045.0 to 50.251.3 to 52.1--50.0 to 65.070.0
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