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	PRODUCT DATA of Sheldahl 146383

Material

Sheldahl 146383

General Information

Previously G400900

Product Type

Thermal-control plastic film.

Chemical Composition

Fluorocarbon (FEP), Aluminised.

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 Data Quality: Manufacturer'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

	THERMAL PROPERTIES

Thermal Conductivity

0.194 W/m.K Data Quality: Manufacturer's data

Thermal Expansion Coefficient

83 μstrain/°C Data Quality: Manufacturer's data

Specific Heat

1.17 J/g.K Data Quality: Manufacturer's data

	OPTICAL PROPERTIES

Thermal Emittance

0.77 Test:ECSS-Q-70-09

Solar Absorbtance

0.13 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(Avg data)

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 146377 (G.400500), 25micron 146416 (G402000) and also thicker; 254micron 146434 (G403800). 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 aluminised FEP may be damaged by thermal cycling according to ECSS-Q-70-04. · Perforated versions of the film are available. Perforation is recommended for space use · 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%. · Protective overlay is available.