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	PRODUCT DATA of Sheldahl 146401

Material	Sheldahl 146401
General Information	Previously G401500
Product Type	Thermal-control plastic film.
Chemical Composition	Fluorocarbon (FEP), Silver and Inconel Coated.
Name of Manufacturer	Sheldahl sheldahl.info@sheldahl.com www.sheldahl.com 150 Sheldahl Rd., Northfield, MN 55057, USA +1 507 663 8000 +1 507 663 8545

	EXPERIENCE IN PRACTICE

Development Status	Special Commercial Product
Cost Range	High
Lot Reproducibility	Good
Space Experience	Good

	PHYSICAL PROPERTIES

Specific Gravity	2.15 Remark: DuPont’s Data
Standard Width	122 mm Data Quality: Manufacturer's data
Thickness	0.127 mm Data Quality: Manufacturer's data

	ELECTRICAL PROPERTIES

Electrical surface resistance	1e16 ohm Remark: ASTM D257-61
Electrical Volume Resistivity	1e16 ohm.m Remark: ASTM D257-61
Dielectric Strength	138 kV/mm Remark: (of FEP film) (25°C, 60Hz) DuPont’s Data , -70°C to +70°C

	THERMAL PROPERTIES

Thermal Conductivity	0.194 W/m.K Remark: DuPont’s Data , -70°C to +70°C
Thermal Expansion Coefficient	83 μstrain/°C Remark: DuPont’s Data , -70°C to +70°C
Specific Heat	1.17 J/g.K Remark: DuPont’s Data , -70°C to +70°C

	OPTICAL PROPERTIES

Thermal Emittance	0.78 Test: ECSS-Q-70-09
Solar Absorbtance	0.08 Test: ECSS-Q-70-09

	RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY

Toxicity/Offgassing	Pass Test: NASA NHB 8060-1A
Temperature Range(space)	-185 to +150°C Test: Long term
Outgassing	RML = 0.05%, CVCM = 0.01% Test: ECSS-Q-70-02
Oxygen Index	95 Test: ECSS-Q-70-21
Moisture Absorption	< 0.01% Test: DuPont’s Data

	SPECIAL RECOMMENDATIONS

Special Recommendations

There exist thinner films of the same material: 50micron 146374, 25micron 146400, 251micron 146435 (G404000) and also thicker. Other widths than standard can be obtained. · There exist similar films with incorporated adhesive, either acrylic pressure sensitive, suitable for space, or silicones of which the suitability is doubtful. It is anyway preferable to fasten the film on a separately applied double-sided adhesive tape in order to avoid crazing in the metal layer due to the peeling off of the liner. · The nomenclature of the Sheldahl company can be confusing and identification of films must be known very precisely for each type used. · Depending on the adhesive used, Sheldahl silvered FEP may be damaged by thermal cycling according to ECSS-Q-70-04. · Perforated versions of the film are available. · Protective coverlay is available. · Electrically conductive versions are also made by Sheldahl (front layer ITO deposit). However, conductivity is not maintained during wide temperature band of thermal cycling and ITO layer is degraded by long-term exposure to RH > 60%.