Mica Roll

Mika Rolly

The raw material of mica refractory roll or tape is mica sheets impregnated with a resin based on polyethylene or fiberglass. These sheets are made of phlogopite or muscovite.

To get acquainted with different types of mica sheets, you can read the article on mica refractory sheets from the refractory website of Pars Industry.

Mica is a combination of minerals containing water, potassium, aluminum silicate, silicon oxide, manganese and iron, which is one of the most widely used insulators in various industries due to its high heat tolerance, remarkable strength and elastic properties.

So far, only six known types of mica have been extracted from rock minerals in nature, and of course, extracting mica is a very complex and difficult process. Among the largest extractors of this mineral are Canada, the United States, India, Russia and Madagascar. These mica, in order of possibility of extraction, are:

Muscovite with light color
Biotite, dark or black
Brown phlogopit
Paragonite, very similar to muscovite (detection of the two is possible only with a microscope)
Pink lipidolite
Green gluconite
Of these mica, only muscovite and phlogopite can be used in industry. To better understand the reason for the great popularity of mica in various fields, we take a brief look at their characteristics. The point to be noted is that the quality of mica, as a natural fossil mineral, is entirely influenced by environmental and geological conditions.

Mica is a non-flammable mineral that, during the preparation process, forms a colorless, thin sheet that is non-compressible and has elastic properties. Mica is able to withstand, on average, about 1000 degrees Celsius. Mica, on the other hand, has low thermal conductivity and maintains its structure at high temperatures. Also, the optimal strength and tensile strength of mica, along with its cohesiveness, elasticity and flexibility, make it very easy to work with mica to shape it in the form of machining, drilling and manual cutting. In addition, due to its elements such as magnesium, potassium, iron, lithium and sodium fluoride, mica has a stunning chemical resistance to water, oil, acids (except hydrofluoride and concentrated sulfur) and alkalis. Finally, the electrical resistance and dielectric properties of mica make it an extraordinary material that is also resistant to electric arcs and the corona phenomenon.

As mentioned earlier, only two species of mica extracted from nature can be used in industry.

Phlogopite or amber mica, in addition to its desirable electrical properties, has a unique heat resistance of up to about 600 ° C due to its high magnesium content. Muscovite or white mica, on the other hand, has a higher potassium content and, therefore, has a significant electrical resistance, which is mainly used in the field of electrical insulation of motors and generators.

To make roll mica, miscuit or phlogopite mica sheets (depending on the needs), ceramic fibers, fiberglass cloth and silicone resin are used as adhesives.

Sanat Pars Refractory Store is ready to provide consulting, sales and delivery of roll mica in various dimensions and thicknesses, all over the country.

Here it is necessary to point out the difference between mica tape and mica roll. Although normally the two products are considered the same, in fact, mica strips are between 5 mm and 1 m wide and about 0.08 to 0.15 mm thick. However, as a standard, the width of the mica roll is one meter and its thickness is 0.2 to 0.8 mm and its length is 20 to 50 meters.

Their properties and intensity are different in mica rolls. This depends on the type of mica sheet, the materials added such as ceramic fibers, fiberglass and plastic, the number of layers and the amount of resin used to make it.

It is suggested to read the article of mica refractory tape from Pars Refractory website for more familiarity with this refractory material.

As mentioned earlier, the thickness of the mica roll is very small. In addition, waterproofness, chemical properties and resistance to most acidic and alkaline materials, and mechanical strength of mica roll, have led to the widespread use of this refractory in various fields such as telecommunications, cable and fiber optic insulation, weapons Military and underground trains. Here are some applications of roll mica in industry:

Insulation of equipment in underground and subway stations
Use in telecommunication centers
Computer and fiber optic cable coverage in computer centers
Insulation of parts in the power station
Insulation of electrical windings
Insulation of industrial power plant equipment
Military weapons
Aerospace units
This diversity in the application of roll mica is the result of unique features that we will mention below:

This refractory product has good tensile strength and has good resistance to vibration and shock. This is due to the good mechanical strength and impact resistance of mica.
Roll mica is fireproof and does not emit toxic gases in hot environments or when exposed to flame.
This refractory material is resistant to most rays.
The average heat resistance of mica rolls is 1000 ° C.
This product is ineffective against most solvents, mineral oils, acidic and alkaline substances and is even waterproof. The only substance that mica should not be exposed to is sulfuric acid.
The dielectric properties and electrical insulation strength of rolled mica will vary depending on the type of mica used, but overall, it is well reported. Of course, the dielectric properties of this refractory material decrease with the passage of temperature above 350 degrees Celsius.
For more information and advice on buying roll refractory mica with different dimensions and thicknesses, you can refer to the website www.nasoozsp.com and contact the experts of Pars Refractory Store.