Celanese Celcon® GC25A POM, 25% Glass Reinforced

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Celanese Celcon® GC25A POM, 25% Glass Reinforced
Categories:	Polymer; Thermoplastic; Acetal (Polyoxymethylene, POM); Acetal Copolymer, 30% Glass Fiber Reinforced
Material Notes:	Celcon« acetal copolymer grade GC25A is a glass coupled formulation containing 25% reinforced fiber glass. This grade offers excellent strength, stiffness and heat distortion temperature with lower mold shrinkage, minimum thermal expansion, excellent dimensional stability and good moldability. Information provided by Celanese
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Physical Properties	Original Value	Comments

Specific Gravity	1.58 g/cc	ASTM D792
Density	1.58 g/cc	ISO 1183
Moisture Absorption	0.200 %	23°C/50%RH; ISO 62
Water Absorption at Saturation	0.80 %	ISO 62
Linear Mold Shrinkage, Flow	0.0040 cm/cm	ISO 294-4
	0.0040 cm/cm	ASTM D955
Linear Mold Shrinkage, Transverse	0.012 cm/cm	ISO 294-4
	0.014 cm/cm	ASTM D955

Mechanical Properties	Original Value	Comments
Tensile Strength at Break	106 MPa	5mm/min; ISO 527-2/1A
	16000 psi	ASTM D638
	10000 psi @Temperature 71.1 °C	ASTM D638
	23000 psi @Temperature -40.0 °C	ASTM D638
Elongation at Break	2.0 %	5mm/min; ISO 527-2/1A
Tensile Modulus	8600 MPa	50mm/min; ISO 527-2/1A
Flexural Strength	160 MPa	ISO 178
Flexural Modulus	8700 MPa	ISO 178
	1.10e+6 psi	ASTM D790
	500000 psi @Temperature 104 °C	ASTM D790
	700000 psi @Temperature 71.1 °C	ASTM D790
Izod Impact, Notched	1.10 ft-lb/in	ASTM D256
	0.700 ft-lb/in @Temperature -40.0 °C	ASTM D256
	0.900 ft-lb/in @Temperature 82.2 °C	ASTM D256
Izod Impact, Notched (ISO)	6.00 kJ/m²	ISO 180/1A
Charpy Impact Unnotched	25.0 kJ/m²	ISO 179/1eU
	35.0 kJ/m² @Temperature -30.0 °C	ISO 179/1eU
Charpy Impact, Notched	6.40 kJ/m²	ISO 179/1eA

Electrical Properties	Original Value	Comments
Volume Resistivity	1.36e+14 ohm-cm	ASTM D257

Thermal Properties	Original Value	Comments
CTE, linear, Parallel to Flow	25.0 µm/m-°C	ISO 11359-2
CTE, linear, Transverse to Flow	120 µm/m-°C	ISO 11359-2
Melting Point	165 °C	10°C/min; ISO 11357-1,-2,-3
	331 °F	ASTM D3418
Deflection Temperature at 1.8 MPa (264 psi)	160 °C	ISO 75-1, -2
	325 °F	ASTM D648

Processing Properties	Original Value	Comments
Processing Temperature	90.0 - 120 °C	cavity
	180 - 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	90.0 - 140 MPa
Hold Pressure	90.0 - 140 MPa
Back Pressure	<= 2.00 MPa

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

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PHCQ103 / 178558

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