PTFE Electrical Insulation Sheets
Electrical insulation materials, such as plastics, are just a small group of materials offered by Advanced Seals & Gaskets Ltd, each sourced from high-quality, reputable suppliers and manufacturers. We can provide electrical insulation plastic sheets in numerous grades, colours and thicknesses, one of which includes a variety of PTFE plastics, or ‘Polytetrafluoroethylene’, sometimes also referred to as Teflon is a very versatile material which is manufactured in sheets of between 0.25 and 100mm thick, in sheet sizes of up to 1500mm x 1500mm (depending on thickness) from which components such as gaskets, washers and strips can be cut using one of our many on-site saws, presses or our oscillating knife. These sheets can be supplied to customers plain or coated, with a choice of self-adhesives, before dispatch or conversion.
In addition to supplying PTFE sheets, we offer a range of services, including custom machining, bonding, and a variety of sizes and finishes to meet specific customer requirements.
Product Enquiry
For information on PTFE Electrical Insulation Sheets please complete the following quick enquiry or call us on +44(0)1384 252555.
Product Specification & Key Characteristics
- Colour: Anthracite
- Density: <90KG/M³
- Fire Propagation Index: <12
- Operating Temperature: -30°C to 100ºC
- Thickness: 1mm – 100mm (can be laminated for greater thickness)
What are PTFE Electrical Insulation Sheets?
PTFE electrical insulation plastic sheets are also referred to as Polytetrafluoroethylene sheets. PTFE is a fluorocarbon material, meaning it consists solely of carbon and fluorine, naturally coloured as standard; however, other colours can be made to order. Fluorocarbons like PTFE are solid at room temperature, hydrophobic (water resistant), non-stick, and highly resistant to aggressive chemicals and environmental factors. PTFE electrical insulation sheets made using a ‘Virgin grade’ in comparison to other plastics have a low mechanical strength; however, this can be improved or reinforced with the inclusion of other additives such as glass fibre or carbon during the raw material manufacturing process. PTFE electrical insulation plastic sheets are large pieces of material, usually manufactured to a specific size, which can be supplied in full or used to convert into smaller components. PTFE electrical insulation sheets are commonly used across a variety of industries for applications such as tank linings, gaskets, and electrical insulation, thanks to their unique properties.
Why use PTFE Electrical Insulation Sheets?
Plastic materials are formulated and manufactured from different compounds to produce products with specific properties. PTFE (Polytetrafluoroethylene) plastics are manufactured using a formulation that produces sheets with excellent properties and unique characteristics, including high thermal stability, chemical resistance, and an extensive operating temperature range of -240 to +260°C.
PTFE electrical insulation sheets also offer chemical inertness (except for elemental alkali metals, chlorine trifluoride, and elemental fluorine at high temperatures and pressures), ozone resistance, flame resistance, and an extremely low coefficient of friction, meaning few materials will stick to it without sufficient preparation. PTFE plastic sheets are soft and formable, with good bearing and wear properties and high dielectric strength, providing a barrier to restrict the flow of electrical current and protecting electrical conductors from coming into contact with people or tools during installation, repairs, or when an electrical appliance or device is in use.
When considering cost, PTFE electrical insulation sheets may have a higher initial cost than some other materials, but their superior performance and longevity often provide better value over time.
Benefits of Using PTFE Electrical Insulation Plastic
- Excellent temp range -200+260°C (short-term up to 300°C)
- high resistance to many chemicals and solvents
- high dielectric properties
- low friction coefficient (create a slippery surface)
- Non-toxic
- Flame resistance
Other Grades of Electrical Insulation Materials Available
Advanced Seals & Gaskets work with a multitude of material manufacturers and suppliers, giving our customers more choice of plastic sheeting - our most popular materials being:
Epoxy Glass - a green-coloured material with good mechanical strength, good chemical, electrical and radiation resistance, low moisture absorption and a working temperature range of up to +120℃.
Kapton is a polyamide film which offers a combination of mechanical and tear strength, along with chemical, electrical and thermal properties that enable the gasket to withstand vibration and extreme temperatures in demanding environments.
Leatheroid is a grey/blue-coloured paper gasket material, also known as Elephantide. This material is used within the electrical industry to insulate hot elements.
MICA is a mineral-based sheeting material that offers excellent mechanical performance, is chemically resistant, and provides electrical and thermal insulation. MICA gaskets are often used to replace asbestos as they can withstand extremely high temperatures of up to 1000℃.
MYLAR is a powerful, flexible polyester film. MYLAR is an excellent insulation material with dielectric strength and moisture resistance.
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 insulating material for a wide range of electrical equipment and applications.
Presspahn is a brown-coloured material manufactured from kraft wood pulp. Presspahn sheets have excellent physical and mechanical properties and are generally used as electrical insulation.
SRBF is a bonded fibre material that is tough and rigid, with an operating temperature of 120℃, low water absorption, and resistance to chemicals.
SRBP (synthetic resin bonded paper) is manufactured using layers of paper and synthetic resins. This material is suited to high- and medium-voltage applications. SRBP has good mechanical properties and excellent electrical insulation, with low water absorption.
Valox is an excellent electrical insulation material which also offers flame-retardant properties.
PVC is a rigid, lightweight, abrasion-resistant, chemical-resistant, and moisture-resistant material with good dielectric strength, making it an excellent choice for electrical insulation applications.
Advantages of Using PTFE Electrical Insulation Sheets
Sheets of Electrical insulation PTFE offer several excellent advantages, making them suitable for many applications and industries. PTFE plastic sheets provide low friction, allowing moving parts to slide more easily and reducing heat and wear. This slipperynon-stick material is also easy to keep clean, and dirt and dust will not stick to its surface. PTFE plastics are non-flammable; this is due not only to their very low friction but also to their ability to withstand very high heat and their extremely high melting point. They offer excellent chemical resistance and are highly durable and weather-resistant, making them suitable for outdoor and harsh-environmental applications. Combined with outstanding electrical properties, it is ideal for use in most industries. PTFE sheets are manufactured in a range of standard thicknesses, which can be converted into components such as gaskets, washers, pads, and strips, which are utilised as seals and fittings in chemical plants, food production, and pharmaceuticals. Due to their non-corrosiveness, these strips can also be used in laboratories where highly corrosive chemicals are handled, and in circuit board components due to their electrical insulation and heat resistance.
Manufacturing and Quality Control
The manufacturing process of PTFE electrical insulation sheets is fundamental to achieving the outstanding performance and reliability that industries demand. At Advanced Seals & Gaskets Ltd, we employ advanced production techniques and rigorous quality control protocols to ensure that every PTFE sheet we supply meets the highest standards for electrical insulation, chemical resistance, and durability.
Our process begins with the careful selection of premium raw materials, ensuring that only pure polytetrafluoroethylene (PTFE) is used. This solid material is renowned for its non-stick properties, low friction, and ability to withstand extreme temperatures, making it ideal for challenging environments. Throughout manufacturing, our facility maintains a controlled environment to protect the PTFE from exposure to elemental alkali metals, elemental fluorine, and chlorine trifluoride—substances that could otherwise compromise its excellent chemical resistance.
We offer PTFE sheets in a wide range of thicknesses and sheet sizes, from ultra-thin films to robust plates, catering to the specific requirements of industries such as chemical processing, electrical insulation, and industrial manufacturing. Whether you need a particular sheet thickness for gaskets, washers, or other components, our flexible production capabilities allow us to deliver materials tailored to your exact specifications.
Quality control is at the heart of our operation. Each batch of PTFE sheets undergoes comprehensive testing to verify key properties, including dielectric strength, low moisture absorption, wear resistance, and flammability rating. Our team conducts regular inspections to ensure that every sheet meets or exceeds industry standards, including FDA requirements for specific applications. This meticulous approach ensures that our PTFE sheets provide reliable electrical insulation and maintain performance even in the most demanding environments.
In addition to our standard PTFE sheets, we supply other grades and specialised variations, such as etched or dimpled surfaces, designed for enhanced adhesion or unique application needs. Our commitment to quality extends beyond manufacturing—we offer expert technical support to help you select the most suitable PTFE material for your project, ensuring you benefit from the full range of properties and advantages our products provide.
With our dedication to excellence in manufacturing and quality control, Advanced Seals & Gaskets Ltd is your trusted partner for high-performance PTFE sheets, gaskets, and electrical insulation materials across a broad spectrum of industries.
Please contact us using the form below or by calling us on +44(0)1384 252555.