Static-Dissipative Acetal Copolymer (SD-A)

MATERIAL DATA SHEET The information contained herein is typical and intended for REFERENCE USE ONLY. This information should NOT be used as a basis for design, manufacturing or quality assurance purposes. Please contact us for complete, manufacturer-approved material property data sheets. All values below are at 72°F (23°) unless otherwise noted.

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Static-Dissipative Acetal Copolymer (SD-A) Specifications

Description

Non-carbon-filled, permanently staticdissipative material which is non-migratory and non-humidity dependent. With enhanced lubricity, SD-A provides superior wear resistance and ease of machining. Its extremely low outgassing values and non-sloughing characteristics make it ideal for applications where particulate generation cannot be tolerated. Enhanced lubricity, chemically resistant, and dimensionally stable.

Applications

Disk drive assembly fixtures • Semiconductor/electronic components • Telecommunication hardware • Automotive equipment

Advantages of Static-Dissipative Acetal Copolymer (SD-A)

Low outgassing • Consistent resistivity values • Ease of machining • Good chemical resistance

Manufacturing Capabilities

Rod: 1/8” to 4” diameter • Sheet: .030” to 4” thick • Film: .010” to .029” thick

Color/Grades

Natural (beige)

Typical Properties of Static-Dissipative Acetal Copolymer (SD-A)

	Units	ASTM Test	Result
Mechanical Properties
Tensile Strength @yeild	psi	D638	6,600
Tensile Elongation @break	%	D638	45.0
Flexural Strength	psi	D790	7,000
Flexural Modulus	psi	D790	210,000
Izod Impact Strength Notched	ft·lbs/in	D256	2.0
Izod Impact Strength Un-notched	ft·lbs/in	D256	no break
Hardness-Shore D	-	D2240	76
Thermal Properties
Heat Deflection Temp. @264 psi	°F	D648	141
Heat Deflection Temp. @66 psi	°F	D648	267
Coefficient of Thermal Expansion	in/in/°F	D696	6.5 x 10-5
Thermal Conductivity	(BTU•in)/(hr•ft2•°F)	-	2.10
Flam. Rating-UL94	-	-	HB
Electrical Properties
Surface Resistivity dry	ohm/sq	D257	109 - 1011
Volume Resistivity dry	ohm/cm	D257	109 - 1011
Static decay 15% RH	seconds	Mil-B-81705-B	<0.3
Other Properties
Specific Gravity	-	D792	1.33
Water Absorption @24 hours	%	D570	2.50