Mica Pads
ASG offer a range of products manufactured used Electrical Insulation materials, including pads cut from Mica. Electrical insulation materials are a group of varied material types each with its own unique properties to meet particular application demands. Mica is just one of many materials which we can offer in the form of cut pads for electrical uses. Mica material itself is made by bonding layers of mica paper together with a resin, which are cured into a choice of rigid or flexible boards in thicknesses ranging from 0.10mm to 50mm and in sheet and roll form which we can then convert or cut into products such as pads. All of our pads are made to order and produced using samples or drawings supplied by customers which help us produce an exact match. Mica can be laminated with a choice of adhesive coatings or foils prior to being converted into finished pads using methods such as pressing, die-cutting and even kiss cutting depending on pad size and quantity ordered.
Product Enquiry
For information on Mica Pads please complete the following quick enquiry or call us on +44(0)1384 252555.
Key Characteristics of Mica
- Colour: muscovite (white) mica and phlogopite (green) mica.
- Sheet Size: 1000 x 1200 mm
- Thicknesses: 01mm - 50mm (depending on grade)
- Density: 2.6 – 3.2 gm/cm3
- Temperature Range: 500°C to 1000°C (depending on grade taken)
- Flame resistance: Flame retardant and non-flammable
- Chemical resistances: inert to water, most acids (excepthydrofluoric and concentrated sulphuric), alkalis, conventional solvents and oil.
Full technical data can be supplied upon request,
or downloaded from our online portal.
Help and guidance
If you would like to speak to a representative to discuss your specific application or requirements please call our sales office direct on 01384 469100, alternatively you can send an E-mail. Simply click on the link and forward us your details along with your question and we will contact you immediately.
Samples - Technical Mica Pads
Samples can be submitted for testing upon request.
Call now for sample requests or further help.
What are Mica Pads?
When choosing pads of electrical insulation applications - one of the options our customers have is to have them made using Mica, they can also choose whether their pads are produced as squares or rectangles with the option of radius corners, and also as circular or oval shaped pads or ‘discs’. Manufacturing pads in-house even means we can also give customers the option of taking them in a choice of plain or self adhesive finishesMica insulation pads are available in one of two colours (depending on grade)- these Mica Gaskets are used as spacers or gap fillers in Electrical insulation applications - used to restrict the flow of electric current, by supporting electrical conductors - without allowing the current to pass through. Mica is a widely used mineral that belongs to a large group of alumina, iron, calcium, magnesium and alkaline mineral silicates, the material itself is available in two mineral types of mica, Muscovite and Phlogopite, available in a choice of rigid or flexible sheets.
Why use Mica Pads?
Mica pads are used in the same manner as a gasket where they are positioned to fill gaps, create barriers and insulate. Electrical insulation pads made from Mica are used to provide a barrier to restrict the flow of electrical current, protecting electrical conductors from coming into contact with people or tools during installation, repairs or when an electrical appliance or device is being used.
Mica pads provide thermal, electrical and flame resistance as well as rapid heat transfer and mechanical strength which help electric devices, foundries and manufacturing plants deal safely with excess heat. These excellent properties make Mica perfect for use as fire door fittings and linings as well as heat shields within vehicles and aeroplanes.
Benefits of Mica
- Heat Resistance up to 1200ºC (rigid Phlogopite)
- Excellent flexural strength and easy to be punched and machined
- Excellent dielectric strength and low electrical conductivity.
- Incombustible
- Asbestos, and halogen free
- Excellent resistance to acids (excluding sulphuric acid), bases, mineral oils and solvents
Other Types of Electrical Insulation materials Available
Advanced Seals & Gaskets work with a multitude of material manufacturers, giving our customers more choice and ensuring we can offer a solution to just about any application, our most popular alternatives to Mica pads include those cut using one of the following:
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 upto +120℃.
Kapton - is a polyamide film which offers a combination of mechanical and tear strength along with chemical, electrical and thermal properties that enables the gasket to withstand vibration and extreme temperatures in demanding environments.
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.
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.
Valox is an excellent electrical insulation material which also offers flame retardant properties.
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 be often 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 Mica Pads
Mica materials have a number of useful and excellent properties which in turn offer users a number of advantages to using these pads. Mica pads offer resistance to high temperatures, chemical resistance and durability, the raw material is available in both rigid and flexible variants, they can be used in a wider range of applications including furnace insulations, automotive spacers or gaskets, fire protection and electrical barriers. The two types of Mica available for the production of cut pads are Muscovite and Phlogopite. Muscovite has a higher dielectric strength and greater insulating properties of the two, therefore more widely used in electrical applications and devices. Phlogopite mica offers a higher heat resistance than muscovite, it is a poor electrical conductor and can be manufactured in flexible or rigid options. Phlogopite Mica pads can withstand temperatures of up to 1200°C due to its low thermal conductivity, yet high thermal stability, this is essential in industrial applications where temperatures can reach intensely high levels and the correct insulation for machinery and equipment is vital for safety. Both Mica types are dielectric, meaning they offer low electrical conductivity, therefore these pads are suited for use as electrical insulators in electronic devices for example within circuit boards, industrial machinery, automotive components and medical devices.
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