Kapton Washers

Kapton Electrical Insulation Washers

Kapton Washers

Washers are crafted from a wide array of materials stocked by ASG, encompassing sponge, rubber, cork, and specialized fibers, resins, plastics, and papers designed for specific applications, such as electrical insulation.

One of our electrical insulation washer types features Kapton (Kapton electrical insulation washers), a polyimide film renowned for its suitability in electrical insulation applications demanding thermal, mechanical, chemical, and electrical properties.

Kapton film is produced in roll form, offering thickness options ranging from 23 to 125 microns, which can be laminated with an adhesive coating before being transformed into washers.

In addition to selecting the appropriate material, precise cutting is crucial for creating reliable and perfectly fitting washers. Our in-house manufacturing team meticulously follows customer drawings or samples specifying the Outer Diameter (OD), Internal Diameter (ID), and thickness to ensure an exact match.

A combination of a highly skilled workforce and advanced machinery, including various presses and CNC machines, empowers us to produce Kapton washers in nearly any size and quantity. These washers can feature a plain or self-adhesive finish, available as individually cut parts or kiss-cut in rolls for quick and easy application.

Product Enquiry

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

    Key Characteristics of Kapton Electrical Insulation

    • 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 Washers

    Electrical insulation washers, essentially flattened rings, serve the purpose of reducing friction, instability, and providing insulation between two surfaces.

    Kapton, a polyamide film also known as 'poly 4,4'-oxydiphenylene-pyromellitimide,' is manufactured using a formulation that includes (PMDA) pyromellitic dianhydride and 4,4’ oxydiphenylamine (ODA). This formula results in the distinctive amber-colored film widely employed in extreme-temperature electrical insulation applications. These applications include circuit boards, transformers, motors, and fiber optics, where the film serves to hinder the flow of electric current by supporting electrical conductors without permitting the current to pass through.

    Why Use Kapton Washers

    Washers crafted from Kapton film act as a crucial barrier, limiting electrical current flow, safeguarding conductors during installation, maintenance, or device usage. Additionally, Kapton electrical insulation washers effectively prevent electrical arcing, a phenomenon where current travels through the air, resulting from gas breakdown and causing ongoing electrical discharge.

    Kapton, beyond its exceptional electrical insulation properties, showcases remarkable temperature stability, flame resistance, chemical resistance, and mechanical strength. This exceptional combination of properties renders Kapton washers an ideal choice for aircraft and aerospace applications.

    Kapton film is available in various grades and thicknesses, ranging from 23 to 125 microns. It can be supplied in full rolls, sheets, or pre-cut washers, providing flexibility to meet specific application needs.

    Benefits Of UsingKapton Washers

    • 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 Washers

    Advanced Seals & Gaskets collaborates with multiple material manufacturers, providing our customers an extensive array of electrical insulation materials, including:

    1. Epoxy Glass - green, offering mechanical strength, chemical and radiation resistance, low moisture absorption, and a temperature range up to +120℃.

    2. Valox - featuring dielectric strength, electrical properties, an operating temperature range of -40°C to 130°C, and resistance to various chemicals.

    3. Leatheroid - gray/blue paper gasket material used for electrical insulation in the industry.

    4. MICA - mineral-based sheeting material with excellent mechanical performance, chemical resistance, and electrical and thermal insulation properties, capable of withstanding temperatures up to 1000℃.

    5. MYLAR - strong, flexible polyester film renowned for its dielectric strength, moisture resistance, and insulation capabilities.

    6. Nomex - withstands high temperatures, possesses high mechanical and dielectric strength, and serves as excellent insulation for electrical equipment.

    7. Presspahn - brown material made from kraft wood pulp, known for its exceptional physical and mechanical properties, often used as electrical insulation.

    8. SRBF - tough, rigid resin-bonded fiber material with an operating temperature of 120℃, low water absorption, and resistance to wear, impact, and chemicals.

    9. SRBP (synthetic resin-bonded paper) - suited for high and medium voltage applications, offering good mechanical and excellent electrical insulation properties with low water absorption.

    10. PTFE - non-conductive plastic material ideal for electrical insulation sheets, suitable for high-temperature applications and featuring excellent dielectric properties.

    11. PVC - tough, lightweight, abrasion, chemical, and moisture-resistant material with good dielectric strength, making it suitable for electrical insulation applications.

    Advantages Of Using Kapton Washers

    Kapton films exhibit exceptional properties, making them a premium material for manufacturing washers in electrical applications.

    Washers crafted from Kapton electrical insulation film find extensive use in aircraft, aerospace, rail, and automotive sectors. These washers are prized for attributes such as mechanical strength, including resistance to abrasion, tear, and puncture. Additionally, they offer high dielectric strength, chemical resistance, and fire resistance, all critical in these applications.

    Kapton electrical insulation washers demonstrate impressive durability, maintaining mechanical properties while enduring vibrations and extreme temperatures, ranging from -269°C to +400°C. These films come in various grades, each offering specific resistance levels and can be efficiently pressed or cut into washers tailored to application needs.

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