PB213b- Aluminum Coated (two-sides) Polyimide

Sheldahl’s family of polyimide films that are aluminized on both sides can be used as first surface mirrors, and are often used in multi-layer insulation (MLI) blankets when a wide temperature range is desired. These products provide low emittance and low solar absorptance.

This product may be ordered with 0.3, 0.5, 1, 2, 3, or 5 mil thick polyimide that conforms to the requirements of ASTM D5213. The aluminum coating is nominally 1000 Ĺ thick, and the most common width is 48 in.

PRODUCT CHARACTERISTICS

Parameter (independent of film thickness)	Specified Value
Absorptance (a)	Ł 0.14
Hemispherical emittance (e_H)	Ł 0.05
Normal emittance (e_N)	Ł 0.05
Typical a/e	4.0
Aluminum surface resistivity	Ł 1 W/square
Intermittent temperature range	-250° C to 400° C (-420° F to 750° F)
Continuous temperature range	-250° C to 290° C (-420° F to 550° F)

Standard Item Number	Thickness mil (ľm)	Typical Weight (g/m²)	Item Number if Perforated
146426	0.3 (8)	11	146427
146424	0.5 (12)	19	146425
146417	1.0 (25)	36	146418
146419	2.0 (51)	71	146420
146421	3.0 (76)	109	146422
146423	5.0 (127)	181	TBD

POST PROCESSING

This product may be processed after metalizing to enhance its functionality. The film may be perforated to facilitate air passage during launch. Sheldahl’s standard perforating patterns are given below. Blanket materials may also be embossed to provide separation between the layers instead of, or in addition to, using fabric spacer layers.

Hole Diameter	Open Area
1.17ą0.05 mm (0.046ą0.002 in.)	0.50ą0.05%, 1.00ą0.10%, 2.15ą0.40%, or 3.50ą0.40%
1.45ą0.08 mm (0.057ą0.003 in.)	0.50ą0.05%, 0.90ą0.15%, 1.50ą0.15%, 2.25ą0.25%, or 5.25ą0.50%

SHELF LIFE

This product shall meet specified values for a minimum of 12 months after the date of shipment provided that the material is stored in its original unopened container at normal interior temperatures (10° C to 27° C / 50° F to 80° F).

OLD PART NUMBERS

Sheldahl’s old designation for this product family was G4024XX. The tables below give a translation between the old and new numbers.

Standard Part Numbers		Thickness	Perforated Part Numbers
Old	New		Old	New
G402410	146417	1.0 mil	G402414	146418
G402420	146419	2.0 mil	G402424	146420
G402430	146421	3.0 mil	G402434	146422
G402450	146423	5.0 mil	G402454	TBD
G402460	146424	0.5 mil	G402464	146425
G402470	146426	0.3 mil	G402474	146427

Sheldahl manufactures a broad range of vacuum deposited films, laminates and tapes. Ask for additional product bulletins describing other Sheldahl products.

The information on this data sheet is based on the data obtained by our research and is considered accurate. However, no warranty is expressed or implied regarding the accuracy of these data and the results obtained from the use thereof. This information is furnished upon the condition that the recipient shall conduct tests to determine the suitability of the product for his or her particular application.

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