SYNTHOS Krasten® 172 General Purpose Polystyrene

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SYNTHOS Krasten® 172 General Purpose Polystyrene
Categories:	Polymer; Thermoplastic; Polystyrene (PS); Polystyrene, Heat Resistant Grade
Material Notes:	Very good heat resistance and mechanical strength. Examples of Application: Extrusion – cups for hot drinks, shower enclosure panels, lightweight XPS sheets. Blends with high impact polystyrene, SBS, thermoformed packaging. Injection moulding – vegetable boxes for refrigerators, CD and DVD cases. Synthos was formerly known as Kaucuk. All information provided by Synthos.
Key Words:	GPPS
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Physical Properties	Metric	English	Comments

Density	1.05 g/cc	0.0379 lb/in³	ISO 1183
Linear Mold Shrinkage	0.0020 - 0.0050 cm/cm	0.0020 - 0.0050 in/in	Internal; 50x50mm
Melt Flow	2.8 - 3.5 g/10 min @Load 5.00 kg, Temperature 200 °C	2.8 - 3.5 g/10 min @Load 11.0 lb, Temperature 392 °F	Granulate; ISO 1133/H

Mechanical Properties	Metric	English	Comments
Ball Indentation Hardness	150 MPa	21800 psi	H 358/30; Ø 50x4mm; ISO 2039-1
Tensile Strength at Break	56.0 MPa	8120 psi	5mm/min; ISO 527-2/1A/5
Elongation at Break	3.0 %	3.0 %	50mm/min; ISO 527-2/1A/5
Tensile Modulus	3.20 GPa	464 ksi	1mm/min; ISO 527-2/1A/1
Flexural Strength	100 MPa	14500 psi	2mm/min; 80x10x4mm; ISO 178
Izod Impact, Unnotched (ISO)	12.0 kJ/m² @Temperature 23.0 °C	5.71 ft-lb/in² @Temperature 73.4 °F	80x10x4mm; ISO 180/1U
Charpy Impact Unnotched	1.60 J/cm² @Temperature 23.0 °C	7.61 ft-lb/in² @Temperature 73.4 °F	80x10x4mm; ISO 179/1eU
	2.60 J/cm² @Temperature 23.0 °C	12.4 ft-lb/in² @Temperature 73.4 °F	80x10x4mm; ISO 179/1fU

Electrical Properties	Metric	English	Comments
Volume Resistivity	>= 1.00e+16 ohm-cm	>= 1.00e+16 ohm-cm	500V; Ø 93x3mm; IEC 93
Surface Resistance	>= 1.00e+15 ohm	>= 1.00e+15 ohm	500V; Ø 93x3mm; IEC 93
Dielectric Constant	<= 2.7 @Frequency 50 Hz	<= 2.7 @Frequency 50 Hz	500V; Ø 93x3mm; IEC 250
Dielectric Strength	>= 60.0 kV/mm	>= 1520 kV/in	Transformer Oil; Ø 93x3mm; IEC 243-1
Dissipation Factor	<= 0.0020 @Frequency 50 Hz	<= 0.0020 @Frequency 50 Hz	500V; Ø 93x3mm; IEC 250
Comparative Tracking Index	>= 250 V	>= 250 V	Solution A; Ø 93x3mm; IEC 112

Thermal Properties	Metric	English	Comments
Deflection Temperature at 1.8 MPa (264 psi)	85.0 °C	185 °F	80x10x4mm; ISO 75-2/Af
Vicat Softening Point	101 °C	214 °F	50°C/h; 50N; 10x10x4mm; ISO 306/B50
	105 °C	221 °F	50°C/h; 10N; 10x10x4mm; ISO 306/A50
Flammability, UL94	HB @Thickness 1.60 mm	HB @Thickness 0.0630 in	Tested in EZÚ Praha
	HB @Thickness 3.00 mm	HB @Thickness 0.118 in	Tested in EZÚ Praha
Glow Wire Test	650 °C	1200 °F	Ø 93x3mm; IEC 695-2-1

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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PSYNT021 / 82634

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