KEP Kepital® F40 Standard Grade/Low Viscosity Acetal Homopolymer

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KEP Kepital® F40 Standard Grade/Low Viscosity Acetal Homopolymer
Categories:	Polymer; Thermoplastic; Acetal (Polyoxymethylene, POM); Acetal Homopolymer, Unreinforced
Material Notes:	injection molding: electrical parts, machine/mechanical parts, industrial parts, automotive applications, electronic data processing. Kepital® is a registered trademark of Korea Engineering Plastics Co., Ltd. Information provided by Dayson Polymers.
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Physical Properties	Original Value	Comments

Density	1.41 g/cc	ASTM D792
Water Absorption	0.22 %	24 hrs.; ASTM D570
Linear Mold Shrinkage, Flow	0.020 cm/cm	ASTM D955
Melt Flow	45 g/10 min	ASTM D1238

Mechanical Properties	Original Value	Comments
Hardness, Rockwell M	80	ASTM D785
Tensile Strength at Break	9020 psi	ASTM D638
Elongation at Break	45 %
Flexural Yield Strength	12800 psi	ASTM D790
Flexural Modulus	379400 psi	ASTM D790
Izod Impact, Notched	0.920 ft-lb/in	0.126 inches; ASTM D256
Tensile Impact Strength	46.7 ft-lb/in²	0.0630 in; ASTM D1822

Electrical Properties	Original Value	Comments
Volume Resistivity	1.00e+14 ohm-cm	ASTM D257
Surface Resistance	1.00e+16 ohm	ASTM D257
Dielectric Constant	3.7 @Frequency 1e+6 Hz	ASTM D150
Dielectric Strength	483 V/mil	ASTM D149
Dissipation Factor	0.0070 @Frequency 1e+6 Hz	ASTM D150

Thermal Properties	Original Value	Comments
CTE, linear, Parallel to Flow	72.0 µin/in-°F @Temperature 20.0 °C	ASTM D696
Melting Point	329 °F
Deflection Temperature at 0.46 MPa (66 psi)	316 °F	Unannealed; ASTM D648
Deflection Temperature at 1.8 MPa (264 psi)	230 °F	Unannealed; ASTM D648
Flammability, UL94	HB @Thickness 0.800 mm
	HB @Thickness 6.40 mm

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