Insulation solutions for consumer appliances are required to ensure their safety and longevity. Many consumer appliances are used regularly and they need to be functioning over a long period of time. Millions of households in the UK will have appliances such as hair dryers and toasters, with many also having convection or fan-assisted heaters. The sheer volume of these appliances mean that there is a demand for insulation providers to offer solutions and high quality insulating materials for these products.
Elmelin specialise in mica-based insulation, with strong expertise in mica itself, and decades of experience with industrial insulation. With adaptability and innovation at the forefront of our values, we have developed outstanding mica-based insulation products for a variety of industries and purposes. The manufacturing and selling of consumer goods and appliances is a competitive market, and these products require excellent insulation solutions to improve their end-user safety and performance. Products such as hair dryers and toasters are exposed to high voltages and temperatures in their day-to-day operation, so it’s key that the insulation used is efficient but also long-lasting.
Mica is incredibly versatile, with the potential to be applied to many different products and solutions. From large-scale furnaces, to handheld consumer appliances, mica can be moulded and processed into various shapes and sizes. It is a naturally occurring silica-based mineral and due its unique chemical composition and physical properties, it is often used as an electrical and thermal insulator.
Mica’s dielectric and thermal resistance properties make it an excellent choice for industrial insulation, yet it is the smooth surface layers that form the mineral which make it so versatile. The smooth surfaces are formed when mica splits along crystalline planes, which results in perfect basal cleavage. Because of this, the mica is flexible and can be shaped into a variety of products including sheets, rolls and tubes.
Mica is a group of minerals that form in multiple tightly packed layers. This two-dimensional sheet structure is the reason for mica being known as silicate sheets. They are found in all three major rock varieties and have certain chemical properties which lends mica to being incredibly useful for industrial insulation.
Due to the layering of the minerals, mica is suited to being produced as mica papers which can be converted into sheets and flexible roll materials. Two of the key properties of mica rolls and mica sheets is the resistance to high temperatures and its inability to conduct electricity. Mica sheets and rolls use these properties, as well as its chemical resistance and durability, in order to work as a highly efficient insulating and reinforcing agent.
Mica can also be rigid or flexible, with flexible being used mainly for furnace insulation and automotive gasket application due to its fantastic electrical resistance under high temperatures. Rigid mica sheets are used for sheathing passive fire protection and dielectric barriers within multiple applications.
There are two types of mica mineral used by Elmelin, Muscovite and Phlogopite. Muscovite mica has a higher dielectric strength, therefore having greater insulating properties, while also being a very poor conductor of electrical currents. Because of this, muscovite is widely recognised as the best mica type for electrical applications and devices. As well as this, muscovite mica can be highly durable and both flexible or rigid depending on resin composition.
Phlogopite mica is similar to muscovite mica; it is more heat resistant than muscovite, and as well a poor electrical conductor and can be manufactured flexible or rigid depending on use. They are the only two mica minerals that are used commercially,
Here we discuss the major advantages of mica’s thermal, electrical and physical properties for industrial insulation.
As a naturally occurring mineral, Mica is a durable material that retains its form when exposed to high temperatures, electrical charges, and light and water. Due to its versatility and thermal resistance, it is used across various industries and in a range of products. In fact, almost every individual will use several products that contain Mica components before leaving the house in the morning.
We have spoken extensively about the properties of Mica, of which there are many! See our previous blog on‘The Benefits of Mica’. However, due to the growing demand for Mica across developing countries and increased demands from the electrical and automotive industry, we are concerned that global regulations on mining such material will not mirror the pace of change.
Passive fire protection, sometimes referred to as PFP, is a method of fire protection that seeks to slow the spread of a fire and smoke by containing it within the compartment of origin for a limited period of time. PFP is an integral part of building construction, heavily regulated by building codes. Passive fire protection measures usually involve the structural or mechanical inclusion of a fire resistant material around the compartment in question. It’s the opposite of active fire protection, which usually uses some sort of electrical component to detect and then suppress the fire. …
Mica insulation has impressive thermal and electrical properties making it a suitable material to solve many engineering challenges. Elmelin have developed processing capabilities to cut, stamp and shape mica to address these challenges.
At Elmelin, we continuously strive to find and design solutions that provide better, safer and more effective insulation for our customers’ requirements. One area we are doing more and more work is in developing solutions for batteries, particularly the high energy density kind used in applications such as electric vehicles. …
High voltage applications require a specialised and stable material for insulation. High voltages can compromise an entire circuit, as well as the safety of users and/or operators if not properly protected against.
Mica is commonly used in a number of high voltage applications. Let’s take a look at why that is and a couple of examples of how it’s used. …
Mica is highly suited to use as insulation in electrical applications – low, mid or high voltage – because of its superior performance. Mica has a high dielectric strength, able to withstand up to 2000 kV/mm before breaking down. In addition, it also has relatively high permittivity, meaning that it performs well as a dielectric in a capacitor. In terms of its physical properties, mica is highly durable and can also be strengthened by combining and laminating it with glass or ceramic, which is common in electrical applications.
With that in mind, let’s look at some more specific applications in which mica electrical insulation is useful. …