Chi Mei Acryrex® CM-205 PMMA

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Chi Mei Acryrex® CM-205 PMMA
Categories:	Polymer; Thermoplastic; Acrylic (PMMA); Acrylic, General Purpose, Molded
Material Notes:	High heat injection grade. It can resist high temperature. High mechanical strength. Applications: The indicator cover of scooter and automobile/sun glasses/digital watch cover. Features: Good Weather Resistance High Heat Resistance High Strength Uses: Automotive Applications Protective Coverings RoHS Compliant Appearance: Clear/Transparent Forms: Pellets Processing Method: Injection Molding Availability: Africa & Middle East Asia Pacific Europe Latin America North America South America
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Physical Properties	Original Value	Comments

Density	0.700 g/cc	Apparent; ASTM D1182
	1.19 g/cc	ISO 1183
Water Absorption	0.30 %	Equilibrium; ASTM D570
Linear Mold Shrinkage, Flow	0.0020 - 0.0060 cm/cm	ASTM D955
Melt Flow	1.8 g/10 min @Load 3.80 kg, Temperature 230 °C	ASTM D1238

Mechanical Properties	Original Value	Comments
Hardness, Shore M	95 @Thickness 6.35 mm	ASTM D785
Tensile Strength, Yield	70.3 MPa @Thickness 3.18 mm	6 mm/min; ASTM D638
Elongation at Break	5.0 % @Thickness 3.18 mm	6 mm/min; ASTM D638
Flexural Strength	108 MPa @Thickness 6.35 mm	2.8 mm/min; ASTM D790
Izod Impact, Notched	20.0 J/m @Thickness 6.35 mm	ASTM D256

Electrical Properties	Original Value	Comments
Volume Resistivity	1.00e+15 ohm-cm	ASTM D257
Dielectric Constant	3.7	ASTM D150
Dielectric Strength	788 kV/in	ASTM D149
Dissipation Factor	0.19	ASTM D150

Thermal Properties	Original Value	Comments
Deflection Temperature at 1.8 MPa (264 psi)	100 °C @Thickness 6.35 mm	Unannealed; ASTM D648
Vicat Softening Point	113 °C	50°C/hr; ASTM D1525
Flammability, UL94	HB @Thickness 1.59 mm	UL 94

Optical Properties	Original Value	Comments
Refractive Index	1.49	ASTM D542
Transmission, Visible	92 % @Thickness 3.18 mm	ASTM D1003

Processing Properties	Original Value	Comments
Rear Barrel Temperature	185 - 205 °C
Middle Barrel Temperature	200 - 220 °C
Front Barrel Temperature	220 - 240 °C
Mold Temperature	50.0 - 70.0 °C
Drying Temperature	85.0 - 90.0 °C @Time 14400 sec

Descriptive Properties
Power Factor	0.5	ASTM D150

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 go back to viewing the property data in MatWeb's normal format.

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PCHI943 / 109431

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