A.17.1. Sheldahl 146368
PRODUCT
Type			Thermal-control polymer film.
Chemical Composition			Fluorocarbon (FEP), Silver and Inconel 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, 223 - 343 K
Specific Heat			1.17 J g^-1 °C^-1		DuPont’s Data, 223 - 343 K
Dielectric Strength (of FEP film)			160 kV/mm		DuPont’s Data, 296 K
Surface Resistance			> 10^15 W £		DuPont’s Data, 296 K
Volume Resistivity			> 10^15 W m		DuPont’s Data, 296 K, 38% RH
Solar Absorbtance			0.10		Typical value only
Thermal Emittance			0.61		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. · An ITO transparent, conductively-coated film is available. Consult the manufacturer for further details.