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Many of the 3M™ Filament Tapes were designed for applications needing both the dielectric strength of polyester film and the high mechanical strength of glass fiber.

Offering the ultimate in low stretch, high tensile strength and edge-tear resistance, these products are more cost effective than glass cloth tapes in applications up to 130 °C. They can be used to anchor lead wires and terminal strips and to band coils. A special paper-backed filament tape is also available to meet the unique requirements of high voltage oil-filled distribution transformers. Available in custom widths from 1/8 inch to 24 inch, and comes standard on a 60 yard roll on a 3 inch diameter core. Standard length varies by thickness.
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Number

Backing Description

Adhesive

Operating Temperature

Total Thickness

Dielectric Breakdown

Insulation Resistance

46 N/A Polyester Film/Glass Filament N/A RT N/A 130 ºC N/A 7 mil0.177 mm N/A 5500 V N/A 3 x 103 Megaohm
1139 N/A Polyester Film/Glass Filament N/A A N/A 155 ºC N/A 6.5 mil0.165 mm N/A 5500 V N/A
1146 N/A Polyester Film/Glass Filament N/A RT N/A 130 ºC N/A 6.5 mil0.165 mm N/A 5500 V N/A
1276 N/A Paper/Glass Filament N/A A N/A 105 ºC N/A 9 mil0.228 mm N/A 3500 V N/A
1339 N/A Polyester Film/Glass Filament N/A A N/A 130 ºC N/A 6.5 mil0.165 mm N/A 5500 V N/A 1 x 105 Megaohm
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