Kapton Sheet

Kapton Electrical Insulation Sheets

Kapton Sheet

Advanced Seals & Gaskets Ltd manufactures a diverse range of materials. These materials, including sponge, foam, rubber, bespoke, and specialist fiber sheets, cater to various needs. Moreover, they ensure customers can meet their requirements without excessive waste.

One standout material is Kapton, a polyimide film renowned for its exceptional thermal, mechanical, chemical, and electrical properties. Kapton films are available in roll form, with thickness options ranging from 23 to 125 microns. Customers also have the flexibility to request sheets measuring 1 or 2 meters in length and 610mm in width.

These sheets of Kapton can be supplied either plain or laminated with an adhesive coating, catering to specific project demands. Furthermore, this material, also known as 'poly 4,4'-oxydiphenylene-pyromellitimide,' is produced using PMDA and ODA, resulting in its distinctive amber color.

Kapton finds extensive application in extreme temperature electrical insulation scenarios, such as circuit boards, transformers, motors, and fiber optics. It effectively serves as a barrier, preventing the flow of electrical current and safeguarding conductors during installation, maintenance, and use.

Beyond its electrical insulation capabilities, Kapton demonstrates outstanding temperature stability, flame resistance, chemical resistance, and mechanical strength. These superior properties make Kapton an ideal choice for demanding applications, particularly in the aerospace and aircraft industries.


Product Enquiry

For information on Kapton Sheet please complete the following quick enquiry or call us on +44(0)1384 252555.

    Key Characteristics of Kapton Sheet

    • Colour: Amber
    • Density: 1.42 g/cc
    • Thickness: 23 micron to 125 micron
    • Dielectric Strength: 8000 volts
    • Temperature Range: -269°C to 400°C
    • Flammability: UL-94 V-0 (self-extinguishing)
    • Resistances: acids, oils, organic solvents

    Full technical data can be supplied upon request,
    or downloaded from our online portal.

    What Are Kapton Sheet

    Sheets of Kapton are cut from master rolls of raw material. Sheets are often taken instead of rolls, when customers only require a small amount of material, giving them the flexibility to be able to cut their own components as and when required without having excessive waste.

    Kapton is a polyamide film, which is also recognised by its chemical name ‘poly 4,4'-oxydiphenylene-pyromellitimide’ - this film is produced using (PMDA) pyromellitic dianhydride and 4,4’ oxydiphenylamine (ODA), which produces the Amber coloured film found used in many extreme temperature electrical insulation applications on items such as circuit boards, transformers, motors and fiber optics.

    Why Use Kapton Sheet

    Produced in roll-form, Kapton Films offer cost savings through various standard thicknesses and lengths, which can be cut into sheets. Kapton acts as a protective barrier, preventing accidental contact with electrical conductors during installation, maintenance, or operation.

    Furthermore, Kapton effectively prevents electrical arcing, the undesirable discharge between conductors. In addition to its electrical insulating properties, Kapton boasts remarkable attributes like temperature stability, flame resistance, chemical resistance, and robust mechanical strength. These outstanding qualities make it the perfect choice for demanding applications, particularly in the aerospace and aircraft sectors.

    Benefits Of Using Kapton Sheet

    • Temperature stability between 269 °C to 400 °C
    • Electrically insulating
    • Resistance to chemicals such as organic solvents and strong acids
    • UL-94 V0 classified - high flame resistance and self-extinguishing
    • Abrasion, tear and puncture resistance
      UV and Gamma radiation resistant

    Other Types of Kapton Sheet

    Advanced Seals & Gaskets work with a multitude of material manufacturers and suppliers, giving our customers more choice of electrical insulation materials- some of the most popular being:

    Epoxy Glass is a green coloured material with good mechanical strength, good chemical, electrical and radiation resistance, low moisture absorption and a working temperature range of upto +120℃.

    Valox - Valox electrical insulation offers dielectric strength, electrical properties, an operating temperature range of -40°C to 130°C and resistance to a wide variety of chemicals including hydrocarbons, dilute acids and bases, detergents and aqueous salt solutions. Valox materials like other plastics offer high-strength and impact resistance, good flexibility, and resistance to shrinkage.

    Leatheroid is a grey/blue coloured paper gasket material, also sometimes called Elephantide. This material is used within the electrical industry to insulate hot elements.

    MICA - is a mineral-based sheeting material which has excellent mechanical performances, is resistant to chemicals and provides electrical and therm insulation. MICA gaskets are often used to replace asbestos as they can withstand extremely high temperatures of up to 1000℃.

    MYLAR is an extremely strong, flexible polyester film. MYLAR is an excellent insulation material with dielectric strength, moisture resistance and is an excellent insulation material.

    Nomex can be manufactured using nomex paper or nomex board, it can withstand high temperatures, has high mechanical and dielectric strength, and is an excellent insulation material for all kinds of electrical equipment and applications.

    Presspahn is a brown coloured material, manufactured using kraft wood pulp. Presspahn sheets have excellent physical and mechanical properties, generally used as electrical insulation.

    SRBF is resin bonded fibre material which is tough and rigid, with an operating temperature of 120℃, low water absorption and is resistant to wear, impact chemicals.

    SRBP (synthetic resin bonded paper) is manufactured using layers of paper and synthetic resins. This material is suited to high and medium voltage application. SRBP has good mechanical and excellent electrical insulation properties, with low water absorption.

    PTFE is a non-conductive plastic material used to produce electrical insulation sheets. PTFE sheets are suitable for high-temperature applications and have a high melting temperature. This material has excellent dielectric properties and can often be found used in circuit boards.

    PVC is a tough, lightweight abrasion, chemical and moisture-resistant material which has good dielectric strength making it a great material to use for electrical insulation applications.

    Advantages Of Using Kapton Sheet

    Sheets of Kapton film and the resulting products exhibit exceptional performance, making them ideal for demanding environments in various sectors.

    These Kapton electrical insulation film-derived components are commonly used in aviation, aerospace, rail, and automotive applications. They possess crucial attributes like mechanical strength, high dielectric strength, chemical resistance, and fire resistance.

    Kapton polyamide films are exceptionally durable, maintaining their mechanical properties even when exposed to extreme conditions such as vibration and temperatures ranging from -269°C to +400°C. Kapton films come in several grades with varying resistance levels. They can be further processed using our advanced on-site facilities to create finished products like pads, gaskets, strips, and washers, available in plain or self-adhesive backed finishes to suit specific needs.

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