Sheldahl’s family of FEP films that are silver coated on one side are used as second surface mirrors to obtain low solar absorptance and high emittance. We then add ITO to the other side to bleed off surface charges without significantly affecting the thermo-optical properties.

This product may be processed to enhance its functionality. The film may be perforated prior to metalization to facilitate air passage during launch or to provide an electrical connection between the silver and ITO coated surfaces. Sheldahl’s standard perforating patterns are given below.

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).

Sheldahl had two "G" numbers for this product family. The tables below give a translation between the old and new numbers.

Sheldahl’s ITO coated silver FEP tapes with 966 acrylic adhesive are used whenever charge dissipation, high emittance, and low solar absorptance are needed. The 966 acrylic adhesive is nominally 2.3 mils thick, provides a strong bond with low outgassing, and can be used over a moderate temperature range. These tapes may be bonded to structures to control radiative heat transfer or used on multilayer insulation blankets to close the edges or repair rips in the outer layers.

This product may be ordered with 1, 2, 5, or 10 mil thick FEP that conforms to ASTM D-3368. The silver coating is nominally 1500 Å thick. We apply a 275 Å overcoat of Inconel to prevent the silver from oxidizing. Although the standard widths for this tape are 1, 2, 3, and 4 inches, it may be ordered in any width needed. Each roll is 108 feet (33 m) long.

This product may be processed after metalizing and combining the film to the adhesive to enhance its functionality. We offer a standard perforation pattern with 0.76 mm (0.03 in.) diameter holes on 6.35 mm (0.25 in.) centers, with a nominal 1.1% open area.

The raw material for these tapes may be embossed prior to coating to provide a more diffuse reflection pattern.

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).

Sheldahl’s old designation for this product family was G4274XX. The table below gives a translation between the old and new numbers.

Sheldahl’s ITO coated silver FEP tapes with 9703 conductive acrylic adhesive are used whenever charge dissipation, high emittance, low solar absorptance, and electrical connection between the tape and the spacecraft are needed. The 9703 conductive acrylic adhesive is nominally 2 mils thick, provides a strong bond with low outgassing, and can be used over a moderate temperature range. These tapes may be bonded to structures to control radiative heat transfer or used on multilayer insulation blankets to close the edges or repair rips in the outer layers.

This product may be ordered with 1, 2, 5, or 10 mil thick FEP that conforms to ASTM D-3368. The silver coating is nominally 1500 Å thick. We apply a 275 Å overcoat of Inconel to prevent the silver from oxidizing. Although the standard widths for this tape are 1, 2, 3, and 4 inches, it may be ordered in any width needed. Each roll is 108 feet (33 m) long.

This product may be processed either before or after metalizing and combining the film to the adhesive to enhance its functionality. By perforating first, there will be an electrical connection from the ITO through the holes to the silver and the conductive adhesive. We offer a standard perforation pattern with 0.76 mm (0.03 in.) diameter holes on 6.35 mm (0.25 in.) centers, with a nominal 1.1% open area.

The raw material for these tapes may be embossed prior to coating to provide a more diffuse reflection pattern.

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).

Sheldahl’s old designation for this product family was G4300XX. The tables below give a translation between the old and new numbers.

Sheldahl’s family of polyimide films that are aluminized on one side and have an indium tin oxide (ITO) coating on the other are often used as outer layers in multi-layer insulation (MLI) blankets. The ITO coating provides a way to bleed off any electrical charge that may accumulate on the outer surface without significantly affecting the emittance or solar absorptance of the second surface mirror. The aluminum side of these products provides low emittance and low solar absorptance. The ITO side of these products has moderate solar absorptance and emittance (as determined by the polyimide film thickness). This product may be produced economically in small quantities using a batch process to manufacture sheets, or in large quantities using a roll to roll coating process. The product may be perforated prior to coating to provide an electrical connection between the ITO and aluminum coatings.

This product may be ordered with 0.5, 1, 2, 3, or 5 mil thick polyimide that conforms to the requirements of ASTM D-5213. The aluminum coating is nominally 1000 Å thick, and the most common width is 48 inches (1.22 m). Sheets are 48 inches (1.22 m) wide and 10 feet (3 m) wide.

* Custom resistance ranges are available upon request

This product may be perforated prior to metalizing to enhance its functionality. Perforated films facilitate air passage during launch and provide a through hole electrical connection from the ITO to the aluminum surface. Sheldahl’s standard perforating patterns are given below.

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).

Sheldahl’s old designation for this product family was G4251XX. The tables below give a translation between the old and new numbers.

Sheldahl’s family of germanium coated polyimide films are well suited for antenna cover applications due to the coating’s unique combination of radio frequency transparency and ability to bleed off static charges.

This product may be processed after metalizing to enhance its functionality. To facilitate air passage during launch, the film may be perforated. Sheldahl’s standard perforating patterns are given below.

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). We recommend storing Germanium coated films in a sealed, Nitrogen purged bag, with desiccant and a humidity indicator.