Asbestos Cardboard. Properties And Application.

In industrial technology of our country, asbestos and asbestos materials have found wide application. Asbestos is classified as a fine-grained silicate material, and in Greek, the word asbestos means "indestructible", "unquenchable." The most important characteristic of asbestos and asbestos products is their fire resistance, which makes it possible to apply them in cases where it is necessary to find a combination of flexibility of materials and fire resistance. Very often, asbestos is used as a raw material in the manufacture of flame retardant fabrics, cardboard.

Asbestos board is used in the machine building industry, as well as as a fireproof material in the insulation of storage tanks of flammable liquids. It is a unique thermal insulation material made from asbestos. The main advantage of asbestos cardboard is its resistance to high temperature. It consists of fibrous chrysotile asbestos mixed with a binder. Asbestos cardboard contains up to 99% of asbestos.

The main advantages of asbestos cardboard are:

- explosion safety and temperature resistance, mechanical properties are preserved at temperatures up to 500 ° C;

- sufficiently high strength, and in the case of deformation due to mechanical action, the thermal insulation properties are preserved;

- No need for frequent replacement due to durability;

- ease of use.

Asbestos board is supplied in sheets of 800 X 1000 mm in thickness from 2 to 10 mm.

Asbestos fabric , asbestos cords, stuffing boxes - all these materials are made from asbestos. Asbestos is also used in the manufacture of various friction materials used in the manufacture of brake pads for cars.

It should be remembered that asbestos is divided into several types, some types of fibers can cause harm to human health. To dangerous types of fibers include anthophyllite, amosite, tremolite, united by a common name - amphiboles. Asbestos fibers belonging to these species are highly rigid and have the appearance of sharp needles. At the same time, chrysotile asbestos, which has soft fibers and elastic needles, is a material that is safe enough for humans. The reason for the danger of amphibole asbestos materials is also their acid resistance, ie, getting into the human lungs, they are practically not removed from the body. Conversely, chrysotile asbestos fibers easily decompose under the action of weak acids and are eliminated from the body.

In nature, asbestos lies at shallow depths, so it is mined by open pit mining. A person tries to find a substitute for asbestos because of its danger in use, but so far this is the only material with a set of characteristic, only asbestos-specific performance properties.

Asbestos is required in accordance with GOST 12871-93, according to which asbestos is divided into 8 groups according to the particle size. In accordance with GOST, the name of the manufacturer, mark, mass and batch number of the asbestos, the date of manufacture and the warning labels and labels of the product must be indicated in the marking of asbestos.

Chrysotile asbestos is packed in paper or synthetic bags, which must guarantee the safety of asbestos throughout the warranty period of storage.