Chi Mei Polyrex® PH-55Y Polystyrene Resin

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Chi Mei Polyrex® PH-55Y Polystyrene Resin
Categories:	Polymer; Thermoplastic; Polystyrene (PS); Polystyrene, Molded, Unreinforced
Material Notes:	For general injection/for injection blowing. Medium Impact. Applications: General injection including injection blowing for food containers, beverage containers, toy casings, piano keyboards and parts. POLYREX® PS resin is a solid polymer formed by heat polymerization of styrene (SM). High Impact Polystyrene (HIPS) composed of SM and butadiene (BD). HIPS is high impact resistant and non-transparent. POLYREX® is suitable for home appliances, food and water contact materials, toys, and construction materials, and especially appliance housings due to its excellent processability. Information provided by Chi Mei Corporation
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Physical Properties	Original Value	Comments

Density	1.05 g/cc	ISO 1183
Linear Mold Shrinkage	0.0040 - 0.0070 cm/cm	ISO 294-4
Melt Flow	9.0 g/10 min @Load 5.00 kg, Temperature 220 °C	Melt Volume Rate (ml/10 min.); ISO 1133

Mechanical Properties	Original Value	Comments
Tensile Strength at Break	25.0 MPa	50 mmm/min; ISO 527
Tensile Strength, Yield	27.0 MPa	50 mm/min; ISO 527
Elongation at Break	60 %	50 mm/min.; ISO 527
Flexural Strength	38.0 MPa	2 mm/min.; ISO 178
Flexural Modulus	1.30 GPa	2 mm/min.; ISO 178
Izod Impact, Notched (ISO)	3.00 kJ/m² @Temperature -30.0 °C	180/1A
	7.00 kJ/m² @Temperature 23.0 °C	180/1A
Charpy Impact, Notched	3.60 kJ/m² @Temperature -30.0 °C	ISO 179
	6.00 kJ/m² @Temperature 23.0 °C	ISO 179

Thermal Properties	Original Value	Comments
CTE, linear	40.0 - 60.0 µm/m-°C	ISO 11359
Deflection Temperature at 1.8 MPa (264 psi)	74.0 °C	annealed; ISO 75A
	87.0 °C	annealed; ISO 75A
Vicat Softening Point	87.0 °C @Load 5.00 kg	50°C/hr; ISO 306
	94.0 °C @Load 1.00 kg	50°C/hr; ISO 306
Flammability, UL94	HB @Thickness 1.50 mm

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PCHI9905 / 280798

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