A.17.4. Sheldahl G423020
PRODUCT
Type			Thermal-control, electrically-conductive, polymer film.
Chemical Composition			Fluorocarbon (FEP), Aluminised and ITO coated.
Manufacturer	Sheldahl 1150 Sheldahl Rd. Northfield, MN 55057 USA				Tel: +1 507 663 8000 Fax: +1 507 663 8545 Email: sheldahl.info@sheldahl.com www.sheldahl.com
EXPERIENCE & AVAILABILITY
Development Status			Special Commercial Product
Cost Range			High
Lot Reproducibility			Good
Space Experience			Limited
GENERAL PROPERTIES (Physical, Mechanical, Thermal, Electrical, Optical)
Nature			Typical Value			Remarks
Specific Gravity				2.15		DuPont’s Data
Thickness				50 mm		Manufacturer’s Data
Standard Width				1220 mm		Manufacturer’s Data
Ultimate Tensile Strength				21 MPa		DuPont’s Data, 298 K
Thermal Expansion Coefficient				83 x 10^-6 °C^-1		DuPont’s Data, 223 - 343 K
Thermal Conductivity				0.194 W m^-1 °C^-1		DuPont’s Data
Specific Heat				1.17 J g^-1 °C^-1		DuPont’s Data
Dielectric Strength (of FEP film)				160 kV/mm		DuPont’s Data, 296 K
Surface Resistance				< 1000 W £		Manufacturer’s Data, 2 VDC
Volume Resistivity				> 10^15 W m		DuPont’s Data, 296 K, 38% RH
Solar Absorbtance				0.16		Typical value only
Thermal Emittance				0.47		Typical value only
PROPERTIES RELEVANT TO SPACE USE
Nature		Typical Value					Type of Test
Temperature Range		88 K to 423 K					DuPont’s Data
Moisture Absorption		0.01%					DuPont’s Data
SPECIAL RECOMMENDATIONS
· The material is available in thicknesses of 12, 25, 50 and 125 mm. · The material is available in widths up to 1220 mm. · The material is available with #966 adhesive on the metallised side. · The material is available with perforations. · The front surface of ITO coating can withstand light handling and abrasion, but it should be protected against excessive handling. Consult the manufacturer for further details.