A.17.5. Dunmore DE291
PRODUCT
Type		Thermal control polymer film.
Chemical Composition		Polyimide (Kapton HN), Aluminised with pretective coating on both sides.
Manufacturer	Dunmore Corporation Keystone Industial Park, 2900 Wharton Rd. Bristol, PA 19007 USA			Tel: +1 215 781 8895 Fax: +1 215 781 9293 Email: www.dunmore.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			1.42		Dupont Data
Thickness			7.6 mm		Manufacturer's Data
Tensile Strength			170 MPa		Dupont Data
Thermal Expansion Coefficient			20 x 10^-6 °C^-1		Dupont Data
Thermal Conductivity			0.028 W m^-1 °C^-1		Dupont Data (@ 23°C)
Specific Heat			1.09 J g^-1 °C^-1		Dupont Data (@ 23°C)
Volume Resistivity			10^10 W m		Dupont Data (@ 23°C)
Solar Absorptance			0.14		Manufacturer's Data
Normal Emittance			0.030		Manufacturer's Data
Standard Width			122 cm		Manufacturer's Data
PROPERTIES RELEVANT TO SPACE USE
Nature		Typical Value				Type of Test
Temperature Range		-190 to +204°C.				Manufacturer's Data
Outgassing		TML = 0.64%, CVCM = 0.03%				ASTM E-595
Moisture Absorption		1.8% @ 50% RH				Dupont Data
SPECIAL RECOMMENDATIONS
· Complies with MIL-STD-810 Method 509 after 24 hours exposure to 5% salt fog, and ASTM B-117. · Intended primarily for use as inner layers on MLI thermal-control blankets for space vehicles where condensation may be a problem. · This product is also available in 12.5, 25, 51 and 76 mm thicknesses. · The full Dunmore part number must be designated for precise material description. · Perforated or embossed versions of the above-mentioned films are available, although film thickness may control selection. Patterns are to be specified at the time of ordering. · These films can be aluminised and corrosion-resistant coated on one or both sides. · Protective coating is a proprietary, fully-cured clear overcoat which protects the aluminised surface from moisture that causes corrosion.