3M

3M 1139 Polyester Film/Glass Filament Reinforced Electrical Tape

3M™ Reinforced Electrical Tape 1139 is an industrial grade 6.5 mil electrical tape constructed with a polyester film, glass filament reinforced backing mated to a pressure sensitive acrylic adhesive. This product is used for heavy duty air and oil filled transfer applications and is suitable for fulfilling reinforcing, holding, separating, insulating, bundling and covering needs. Constructed for effectiveness in demanding industrial applications, this product exhibits solvent resistance without thermosetting and a high breaking strength.

Solvent-resistant, high temperature filament tape with acrylic adhesive
Designed for applications needing both the dielectric strength of polyester film and the high mechanical strength of glass fibers
Low stretch, high tensile and edge-tear resistance

Color: White

Backing/Carrier Material: Polyester Film/Glass Filament

Adhesive Type: Acrylic

TotalThickness: 6.5 mil

Overview
Customize
Features
Specifications
Compliance
Resources

Overview

Consult

Specify a finalized design or create a new one from scratch with our experienced converting experts.

Design

Pair our material sampling library with our precision converting capabilities to optimize and validate a prototype.

Produce

Rely on our top-tier suppliers, strict quality controls, and hands-on help to ensure your product's effectiveness throughout its lifecycle.

Customize

Customize This Material

Our wide range of converting capabilities allow us to take this material and transform it into the right width, length, shape or fabricated part to not only achieve ideal integration into your end use, but also optimize how you apply the material in your application. Our converting equipment paired with our expert engineering team will help you create the exact custom solution for your unique requirements.

To learn more about the most common converting services we offer, or to contact our team to start discussing your solution, please utilize the below links:

Tape Slitting

Die-Cutting

Custom Part Fabrication

Prototyping

Custom Length Rolls

Features

Solvent-resistant, high temperature filament tape with acrylic adhesive
Designed for applications needing both the dielectric strength of polyester film and the high mechanical strength of glass fibers
Low stretch, high tensile and edge-tear resistance
Withstands a temperature range of 32°F to 311°F (0°C to 155°C)
Acrylic adhesive that offers firm adherence
A more cost-effective solution to glass cloth tapes
600V rated

Specifications

Color	White
Backing/Carrier Material	Polyester Film/Glass Filament
Adhesive Type	Acrylic
Total Thickness	6.5 mil
Backing/Carrier Thickness	5.5 mil
Adhesive Thickness	1 mil
Adhesive Strength	35 oz/in
Tensile Strength	225 lb/in
Elongation	6%
Dielectric Breakdown	5,500 volts
Minimum Temperature Performance	32°F
Maximum Temperature Performance	311°F

Compliance

We value the importance of up to date an accurate regulatory information on the products we work with. For the most current Compliance and Regulatory information on your product of interest, please contact our experts for assistance.

Resources

Technical Data Sheet

3M™ Filament Reinforced Electrical Tape 1139 is a 6.5mm thick, acrylic adhesive, solvent resistant, electrical tape. This electric tape is suitable for oil and air filled transfer applications and reinforcements.

Can also hold and separate ground insulation. 600V rated and withstands a temperature range of 32 to 311 °F (0 to 155 °C).

Excellent for anchoring lead wires to banding coils and end-turn taping
Suitable for oil and air filled transfer applications and reinforcements, as well as for holding and separating ground insulation

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