Pomulux Acetal Property Data Sheet
Physical Properties Metric English Comments
Density 1.41 g/cc 0.0509 lb/in�  ASTM D792
Water Absorption 0.22 % 0.22 %  ASTM D570; 24 hrs.

Mechanical Properties
Hardness, Rockwell M 80 80  ASTM D7852
Tensile Strength @ Yield 60.7 MPa 8800 psi  ASTM D638
Elongation at Break 75 % 75 %  ASTM D638
Tensile Modulus 2.83 GPa 410 ksi  ASTM D638
Flexural Modulus 2.59 GPa 375 ksi  ASTM D790
Compressive Strength 110 MPa 16000 psi  ASTM D695; at 10% Deflection
Izod Impact, Notched 0.801 J/cm 1.5 ft-lb/in  ASTM D256

Electrical Properties
Dielectric Constant 3.8 3.8  ASTM D150; at 60Hz

Thermal Properties
CTE, linear 68F 84.6 m/m-C 47 in/in-F  ASTM D696
Thermal Conductivity 0.231 W/m-K 1.6 BTU-in/hr-ft�-°F  ASTM C177
Deflection Temperature at 0.46 MPa (66 psi) 157C 315 F  ASTM D648
Deflection Temperature at 1.8 MPa (264 psi) 104°C 219F  ASTM D648
Flammability, UL94 HB HB  at 0.060
 

Typical Chemical Resistant Data

CHEMICAL PROPERTIES
 ENGLISH VALUES
 COMMENTS
 METRIC VALUES
Water Absorption Immersion, 24 hr., %
 0.3
 ASTM D570
 0.3 %
Water Absorption Immersion Sat, %
 0.6
 ASTM D570
 0.6 %
Acids, Weak (acetic, dilute HCl)
 3
 Acceptable Service
 3
Acids, Strong (conc. HCl or sulfuric)
 1
 Unnacceptable
 1
Alkalies, Weak (dilute NaOH)
 3
 Acceptable Service
 3
Alkalies, Strong (conc. NaOH)
 1
 Unnacceptable
 1
Hydrocarbons, Aromatic (toluene)
 1
 Unnacceptable
 1
Hydrocarbons, Aliphatic (gasoline)
 2
 Limited Service
 2
Ketones, Esters (acetone)
 1
 Unnacceptable
 1
Ethers (diethyl ether, THF)
 2
 Limited Service
 2
Chlorinated Solvents (methylene chloride)
 1
 Unnacceptable
 1
Alcohols (methanol, anti-freeze)
 3
 Acceptable Service
 3
Inorganic Salt Solutions (NaCl, KCl)
 3
 Acceptable Service
 3
Continuous Sunlight
 2
 Limited Service
 2
Steam
 3
 Acceptable Service
 3