Celanese Celcon® MC270-HM POM, Mineral Reinforced

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Celanese Celcon® MC270-HM POM, Mineral Reinforced
Categories:	Polymer; Thermoplastic; Acetal (Polyoxymethylene, POM); Acetal Copolymer, Mineral Filled
Material Notes:	Celcon« MC270-HM is a high modulus, mineral coupled acetal copolymer. It utilizes a higher additive level to provide significant improvement in product stiffness and mold shrinkage and better warpage resistance than unfilled Celcon« M270. Celcon« MC270-HM is formulated to produce very flat, dimensionally stable parts. Information provided by Celanese
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Physical Properties	Original Value	Comments

Specific Gravity	1.60 g/cc	ASTM D792
Density	1.57 g/cc	ISO 1183
Moisture Absorption	0.200 %	23°C/50%RH; ISO 62
Water Absorption at Saturation	0.75 %	ISO 62
Linear Mold Shrinkage, Flow	0.015 cm/cm	ISO 294-4
	0.015 cm/cm	ASTM D955
Linear Mold Shrinkage, Transverse	0.012 cm/cm	ASTM D955
	0.013 cm/cm	ISO 294-4

Mechanical Properties	Original Value	Comments
Tensile Strength, Yield	45.0 MPa	50mm/min; ISO 527-2/1A
	6400 psi	ASTM D638
Elongation at Yield	5.0 %	50mm/min; ISO 527-2/1A
Tensile Modulus	3750 MPa	50mm/min; ISO 527-2/1A
Flexural Strength	77.0 MPa	ISO 178
Flexural Modulus	3700 MPa	ISO 178
	500000 psi	ASTM D790
Izod Impact, Notched	0.900 ft-lb/in	ASTM D256
	0.600 ft-lb/in @Temperature -40.0 °C	ASTM D256
	0.900 ft-lb/in @Temperature 82.2 °C	ASTM D256
Izod Impact, Notched (ISO)	5.30 kJ/m²	ISO 180/1A
Charpy Impact, Notched	4.80 kJ/m²	ISO 179/1eA
	3.50 kJ/m² @Temperature -30.0 °C	ISO 179/1eA

Thermal Properties	Original Value	Comments
CTE, linear, Parallel to Flow	60.0 µm/m-°C	ISO 11359-2
CTE, linear, Transverse to Flow	90.0 µm/m-°C	ISO 11359-2
Melting Point	165 °C	10°C/min; ISO 11357-1,-2,-3
	329 °F	ASTM D3418
Deflection Temperature at 1.8 MPa (264 psi)	105 °C	ISO 75-1, -2
	207 °F	ASTM D648

Processing Properties	Original Value	Comments
Processing Temperature	80.0 - 120 °C	cavity
	190 - 200 °C	hot runner
Zone 1	170 - 180 °C
Zone 2	180 - 190 °C
Zone 3	180 - 190 °C
Zone 4	190 - 200 °C
Die Temperature	190 - 200 °C
Melt Temperature	180 - 200 °C
Drying Temperature	80.0 - 100 °C
Dry Time	3.00 hour
Injection Pressure	60.0 - 120 MPa
Hold Pressure	60.0 - 120 MPa
Back Pressure	<= 4.00 MPa

Descriptive Properties
Injection molding	Yes
Injection speed	slow
Pellets	Yes
Processing conditions acc. ISO	9988-2

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