Acetal (POM) Copolymer

Celcon® M90

General purpose, good optimization of properties
Celcon® acetal copolymer grade M90 is a medium viscosity polymer providing optimum performance in general purpose injection molding and extrusion of thin walled tubing and thin gauge film. This grade provides overall excellent performance in many applications. Chemical abbreviation according to ISO 1043-1: POM Please also see Hostaform® C 9021.

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Mechanical	Nominal Value	Unit	Test Method
Tensile Modulus	400000	psi	ISO 527-1
Tensile Stress (Yield)	9430	psi	ISO 527-2/50
Tensile Strain (Yield)	10	%	ISO 527-2/50
Tensile Creep Modulus			ISO 899-1
1 hr	355000	psi
1000 hr	196000	psi
Flexural Modulus (73°F)	370000	psi	ISO 178
Flexural Stress (3.5% Strain)	10600	psi	ISO 178
Compressive Stress			ISO 604
1% Strain	3770	psi
6% Strain	12800	psi
Poisson’s Ratio	0.40		ISO 527

Thermal	Nominal Value	Unit	Test Method
Deflection Temperature Under Load
66 psi, Unannealed	316	°F	ISO 75-2/B
264 psi, Unannealed	214	°F	ISO 75-2/A
Ball Pressure Test (302°F)	Pass		IEC 60695-10-2
Melting Temperature³	331	°F	ISO 11357-3
CLTE			ISO 11359-2
Flow	6.7E-5	in/in/°F
Transverse	6.7E-5	in/in/°F
Effective Thermal Diffusivity	7.52E-5	in²/s	Internal Method

Electrical	Nominal Value	Unit	Test Method
Surface Resistivity (73°F)	3.0E+16	ohms	IEC 62631-3-2
Volume Resistivity (73°F)	8.0E+12	ohms·m	IEC 62631-3-1

Fill Analysis	Nominal Value	Unit	Test Method
Melt Density	1.20	g/cm³	Internal Method
Melt Specific Heat	0.528	Btu/lb/°F	Internal Method
Melt Thermal Conductivity	1.1	Btu·in/hr/ft²/°F	Internal Method
Ejection Temperature	284	°F

Injection	Nominal Value	Unit
Drying Temperature	212 to 248	°F
Drying Time	3.0 to 4.0	hr
Rear Temperature	338 to 356	°F
Middle Temperature	356 to 374	°F
Front Temperature	356 to 374	°F
Injection Zone 4 Temperature	374 to 392	°F
Nozzle Temperature	374 to 392	°F
Processing (Melt) Temp	356 to 374	°F
Melt Temperature (Optimum)	345	°F
Mold Temperature	176 to 248	°F
Injection Rate	Slow-Moderate
Back Pressure	< 580	psi
Hot Runner	356 to 392	°F

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Celcon® M90

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Celcon® M90

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