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PRODUCT DATA of Dunmore DE291
MaterialDunmore DE291
Product TypeThermal control polymer film.
Chemical CompositionPolyimide (Kapton HN), Aluminised with pretective coating on both sides.
Name of ManufacturerDunmore Coorperation
Keystone Industrial Park, 2900 Wharton Rd., Bristol, PA 19007, USA
+1 215 781 8895
+1 215 781 9293
www.dunmore.com
EXPERIENCE IN PRACTICE
Development StatusSpecial Commercial Product
Cost RangeHigh
Lot ReproducibilityGood
Space ExperienceLimited
PHYSICAL PROPERTIES
Specific Gravity1.42
Data Quality: Manufacturer's data
Standard Width122 mm
Data Quality: Manufacturer's data
Thickness0.0076 mm
Data Quality: Manufacturer's data
ELECTRICAL PROPERTIES
Electrical Volume Resistivity1e10 ohm.m @23°C
Data Quality: Manufacturer's data
THERMAL PROPERTIES
Thermal Conductivity0.028 W/m.K @ 23°C
Data Quality: Manufacturer's data
Thermal Expansion Coefficient20 μstrain/°C
Data Quality: Manufacturer's data
Specific Heat1.09 J/g.K @ 23°C
Data Quality: Manufacturer's data
OPTICAL PROPERTIES
Normal Emittance0.03
Data Quality: Manufacturer's data
Solar Absorbtance0.14
Data Quality: Manufacturer's data
RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY
Temperature Range(space)-190 to +204°C.
Data Quality: Manufacturer's data
Outgassing(Avg data)TML = 0.64%, CVCM = 0.03%
Test:ASTM E-595
Moisture Absorption1.8% @ 50% RH
Data Quality: Manufacturer's data
SPECIAL RECOMMENDATIONS
Special RecommendationsComplies 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 micron 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.