eFunda Polymers: Properties of Acetal {copolymer, 10% PAN carbon fiber, 10% PTFE filled, EMI shielding (conductive)}
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Acetal		  
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State: copolymer
Additives: 10% PAN carbon fiber, 10% PTFE filled
Application: EMI shielding (conductive)
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Elastic Modulus (MPa)   8970  tensile   D638
Flexural Modulus (MPa)   6900   23 ºC   D790
Tensile Strength (MPa)   83 at break   D638
Flexural Strength (MPa)
at yield or break		   97     D790
Elongation at break (%)   2     D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted		   0.4     D256A

 Thermal Properties Conditions
Pressure State ASTM
Deflection Temperature (ºC)  163   0.46 MPa   D648
 160   1.82 MPa   D648

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.49   D792
Water Absorption (% weight increase)  0.25  after 24 hrs D570

 Processing Properties Conditions
Type ASTM
Melting Temperature (ºC)  163 - 175  Tm, crystalline  
Processing Temperature (ºC)  177 - 210  injection molding  
Linear Mold Shrinkage (cm/cm)  0.002   D955

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Suppliers
DSM Engineering Plastic Products, Inc. Reading, PA  800-729-0101
Ferro Corp. Cleveland, OH   
LNP Engineering Plastics, Inc. Exton, PA  800-854-8774
M.A. Hanna Engineered Materials Norcross, GA   
RTP Co. Winona, MN  800-433-4787

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