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IN
1 IN = 25.4 MM
MM
1 MM = 0.0393700787 IN
 
Acetal - Printer Friendly Version

Acetal resins are odorless, tasteless and nontoxic. Key properties include high strength and rigidity, excellent dimensional stability, fatigue endurance, relatively low moisture absorption and low dynamic and static coefficient of friction. Perhaps the most outstanding feature is Acetal's ability to retain these properties over a wide range of adverse conditions including extreme humidity, exposure to solvents and other chemicals and high loading and prolonged cyclic stressing. Acetal is widely used in the automotive, electrical, machinery, equipment and watch making industries.

Ultraform® N2320 (Acetal [POM] Copolymer) Property Sheet

*  All Values are Nominal.
Physical Value Test
Density-Specific Gravity 1.41 sp gr 23/23 ºC ASTM D792
Melt Flow Rate (E - 190 ºC/2.16 kg) 9 g/10 min ASTM D1238
Mold Shrink, Linear Flow 20 mil/in ASTM D955
Mold Shrink, Linear-Trans 19 mil/in ASTM D955
Water Absorption @ 24 hrs .2 % ASTM D570
Water Absorption @ Equil .2 % ASTM D570

Mechanical Value Test
Tensile Modulus 4e+005 psi ASTM D638
Tensile Strength @ Yld 9000 psi ASTM D638

Impact Value Test
Notched Izod Impact:
(73 ºF)
(-40 ºF)
 
1.3 ft-lb/in
1.12 ft-lb/in
ASTM D256

Thermal Value Test
DTUL @ 264psi - Unannealed 230 ºF ASTM D648
DTUL @ 66psi - Unannealed 320 ºF ASTM D648
Max Continuous Use Temp 212 ºF ASTM D794
Melting Point 327 to 335 ºF --
CLTE, Flow 6.1e-005 in/in/ºF ASTM D696

Electrical Value Test
Surface Resistivity 1e+013 ohms ASTM D257
Volume Resistivity 1e+015 ohm-cm ASTM D257
Dielectric Constant (1e+006 Hz) 3.8 ASTM D150
Dissipation Factor (1e+009 Hz) .005 ASTM D150
Arc Resistance (.1259 in) 150 sec ASTM D495

Ignition Value Test
Flame Rating - UL:
(.03149 in)
(.062 in)
(.1259 in)
(.2401 in)
 
HB
HB
HB
HB
UL 94

UL 746 Value Test
Rel Temp Index Mech w/o Imp:
(.06181 in)
(.1259 in)
(.2401 in)
 
194 ºF
221 ºF
221 ºF
UL 746
Rel Temp Index Mech w/ Imp:
(.06181 in)
(.1259 in)
(.2401 in)
 
194 ºF
194 ºF
194 ºF
UL 746
Rel Temp Index Elec:
(.03149 in)
(.062 in)
(.1259 in)
(.2401 in)
 
221 ºF
221 ºF
221 ºF
221 ºF
UL 746
Comparative Track Index:
(.1259 in)
 
600 V
UL 746
High Volt Arc Track Rate:
(.06181 in)
 
.6889 in/min
UL 746
Hot Wire Ignition:
(.05905 in)
(.1181 in)
 
10.5 sec
22.5 sec
UL 746
High Ampere Arc Ignition:
(.05905 in)
 
120
UL 746

** These are typical property values intended only as guides. They should not be used to establish specification limits or as the sole basis of design. Determining whether this information, or this plastic, should be used for a particular application is the responsibility of the user.

 


 
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