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	Original Value	Comments

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

Mechanical Properties	Original Value	Comments
Ball Indentation Hardness	150 MPa	H 358/30; Ø 50x4mm; ISO 2039-1
Tensile Strength at Break	56.0 MPa	5mm/min; ISO 527-2/1A/5
Elongation at Break	3.0 %	50mm/min; ISO 527-2/1A/5
Tensile Modulus	3200 MPa	1mm/min; ISO 527-2/1A/1
Flexural Strength	100 MPa	2mm/min; 80x10x4mm; ISO 178
Izod Impact, Unnotched (ISO)	12.0 kJ/m² @Temperature 23.0 °C	80x10x4mm; ISO 180/1U
Charpy Impact Unnotched	1.60 J/cm² @Temperature 23.0 °C	80x10x4mm; ISO 179/1eU
	2.60 J/cm² @Temperature 23.0 °C	80x10x4mm; ISO 179/1fU

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

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

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PSYNT021 / 82634

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