A.17.7. Dunmore DE 028

PRODUCT

Type

Thermoplastic film.

Chemical Composition

Polyethylene Terephthalate / PETP, Aluminised.

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

Commercial Product

Cost Range

Low to Medium

Lot Reproducibility

Good

Space Experience

Good

GENERAL PROPERTIES (Physical, Mechanical, Thermal, Electrical, Optical)

Nature

Typical Value

Remarks

Specific Gravity

1.4

Dupont Data

Thickness

6.3 mm

Manufacturer's Data

Tensile Strength

210 MPa

Dupont Data (@ 25C)

Thermal Expansion Coefficient

30 x 10-6 C -1

Dupont Data

Thermal Conductivity

0.61 W m -1 C -1

Dupont Data

Specific Heat

1.3 J g-1 C -1

Dupont Data

Surface Resistance

1016 W

Dupont Data (@ 25C, 38% RH)

Volume Resistivity

1014 W m

Dupont Data (@ 25C)

Solar Absorptance

0.07

ASTM E-424 Method A

Normal Emittance

0.020

Manufacturer's Data

Standard Width

142 cm

Manufacturer's Data

PROPERTIES RELEVANT TO SPACE USE

Nature

Typical Value

Type of Test

Temperature Range

-180 to +150C

Dupont Data

Outgassing

TML = 0.29%, CVCM = 0.00%

ASTM E-595

Moisture Absorption

Les than 0.8% @ 23C

ASTM D-570-63

Toxicity/Offgassing

Pass

NASA NHB 8060.1A

SPECIAL RECOMMENDATIONS

          Normal use is for internal sheets of multilayer insulation (MLI). Use depends on blanket type and requirement. Suitable venting should be considered for blanket use. Can also be used in crinkled form for cryogenic insulation.

          This product is available with vacuum-deposited aluminium on one or both sides.

          Widths up to 1574 mm available on special request.

          The full Dunmore part number must be designated for precise material description.

          This product can be perforated, embossed or crinkled if desired. Patterns are to be specified at the time of ordering.

          Also available in 12.5, 25, 51 and 76 mm thicknesses.

          Normal emittance value is measured on the aluminised surface.