Celanese Hostaform® C 27021 XAP C POM

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Celanese Hostaform® C 27021 XAP C POM
Categories:	Polymer; Thermoplastic; Acetal (Polyoxymethylene, POM)
Material Notes:	POM copolymer Reduced Emissions and Migrations Information provided by Celanese
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Physical Properties	Original Value	Comments

Density	1.41 g/cc	ISO 1183
Melt Density	1.20 g/cc @Temperature >=166 °C
Water Absorption	0.65 %	ISO 62
Linear Mold Shrinkage, Flow	0.019 cm/cm	ISO 294-4
Linear Mold Shrinkage, Transverse	0.018 cm/cm	ISO 294-4
Melt Flow	24 g/10 min @Load 2.16 kg, Temperature 190 °C	(MVR) cm³/10min; ISO 1133

Mechanical Properties	Original Value	Comments
Tensile Strength, Yield	65.0 MPa	50mm/min; ISO 527-2/1A
Elongation at Break	17 %	50mm/min; ISO 527-2/1A
Elongation at Yield	7.5 %	50mm/min; ISO 527-2/1A
Tensile Modulus	2900 MPa	1mm/min; ISO 527-2/1A
Flexural Modulus	2800 MPa	ISO 178
Charpy Impact Unnotched	120 kJ/m²	ISO 179/1eU
	120 kJ/m² @Temperature -30.0 °C	ISO 179/1eU
Charpy Impact, Notched	5.50 kJ/m²	ISO 179/1eA
	5.50 kJ/m² @Temperature -30.0 °C	ISO 179/1eA
Tensile Creep Modulus, 1 hour	2500 MPa	ISO 899-1
Tensile Creep Modulus, 1000 hours	1300 MPa	ISO 899-1

Electrical Properties	Original Value	Comments
Volume Resistivity	1.00e+14 ohm-cm	IEC 60093
Surface Resistance	1.00e+14 ohm	IEC 60093
Dielectric Constant	4.0 @Frequency 100 Hz	IEC 60250
	4.0 @Frequency 1e+6 Hz	IEC 60250
Dielectric Strength	35.0 kV/mm	IEC 60243-1
Dissipation Factor	0.0025 @Frequency 100 Hz	IEC 60250
	0.0050 @Frequency 1e+6 Hz	IEC 60250
Comparative Tracking Index	600 V	IEC 60112

Thermal Properties	Original Value	Comments
CTE, linear	110 µm/m-°C	ISO 11359-2
Specific Heat Capacity	2.21 J/g-°C	Internal
Thermal Conductivity	0.155 W/m-K	Internal
Melting Point	166 °C	10°C/min; ISO 11357-1,-2,-3
Deflection Temperature at 1.8 MPa (264 psi)	106 °C	ISO 75-1, -2
Flammability, UL94	HB @Thickness 1.60 mm	UL94
	HB @Thickness 3.00 mm	UL94

Processing Properties	Original Value	Comments
Processing Temperature	20.0 - 30.0 °C
	80.0 - 120 °C	Cavity temperature
	165 °C	Ejection temperature; Internal
Feed Temperature	60.0 - 80.0 °C
Zone 1	170 - 180 °C
Zone 2	180 - 190 °C
Zone 3	190 - 200 °C
Zone 4	190 - 210 °C
Die Temperature	190 - 210 °C
Melt Temperature	190 - 210 °C
Drying Temperature	120 - 140 °C
Dry Time	3.00 - 4.00 hour
Moisture Content	0.15 %	Necessary low maximum residual
Injection Pressure	60.0 - 120 MPa
Hold Pressure	60.0 - 120 MPa
Back Pressure	4.00 MPa
Screw Speed	70 rpm @Diameter 55.0 mm
	100 rpm @Diameter 40.0 mm
	150 rpm @Diameter 25.0 mm
Hot-Working Temperature	190 - 210 °C

Descriptive Properties
Injection molding	Yes
Injection speed	slow-medium
Longer pre-drying times/storage	The product can then be stored in standard conditions until processed.
Pre-drying	Drying is not normally required with proper storage
Processing conditions	ISO 9988

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