Asbestos cloth АТ-19-М-70 GOST 6102-94 is one of the types of insulating or independent heat-protective materials, characterized by thinness and plasticity. The advantage of an asbestos sheet is the ability to cut out pieces of the desired shape and size from it, sew them together, wrap certain parts, etc.
A good and inexpensive fire-protective and heat-insulating material is asbestos fabric, the properties of which are determined both by the properties of asbestos threads and by the characteristics of additional fibers.
Asbestos threads underlie this fabric - it is woven, like any other ordinary fabric, by interlacing longitudinal and transverse fibers on weaving equipment. But to asbestos, to increase strength, add a certain percentage of other natural or synthetic threads - either cotton, or viscose or lavsan. The percentage of such additives in the asbestos fabric composition can be from 5 to 18%.
There are several variations of fabric - this is AT-2 asbestos fabric, AT-3 asbestos fiber fabric, AT-4 asbestos fabric, and so on - in total, about two dozen varieties are produced, varying in density, fiber thickness, weaving cell size, smoothness , etc.
Asbestos fabrics have a very wide scope:
In heating networks, where they perform the functions of thermal insulation and cushioning material;
To create a seal in the elements in boiler rooms, furnaces and other heating equipment;
Asbestos fabric is used when sewing overalls, which must be resistant to heat and protect a person from high temperatures, sparks, etc. These are special suits for firefighters, protective clothing for people working in hot shops, etc.;
Asbestos fabric underlies such materials as asboplastics and asbestos-textolites.
Asbestos fabric - a fabric made of interwoven asbestos threads, to which a binder of viscose, lavsan (polyester) or cotton fiber is added. The content of binder fibers can be from 5 to 18%, the duration of use of asbestos fabric depends on their type. If natural cotton fiber was used for its manufacture, the warranty period will be up to 5 years, when using synthetic polyester fiber, its duration is increased by 2 times.
In production, only chrysotile asbestos is used - it is a safe material that does not have carcinogenic properties. It is a layered material of bundles of fine fibers. They have a very high resistance to tearing - according to this indicator, they can be compared with steel. Such an asbestos sheet does not cause the development of cancerous tumors, so it can be safely used by humans.
The main properties of asbestos fabric
Asbestos cloth is produced in rolls, the weight of which should not exceed 80 kg. The width of the fabric can be standard or non-standard, the choice depends on the requirements of the customer. The material has a natural white or tan color with a rough texture. Asbestos fabric has the following properties and features:
Fire resistance, thermal insulation properties. It was they who provided asbestos fabric with the widest application in industry: it is used in the manufacture of refractory materials and insulators.
Flexibility. The material is an easily bent canvas, it does not crack or tear. This is a fabric that, if necessary, can be folded, twisted into rolls, it is convenient for transportation over long distances.
Resistance to biological influences. The material is not destroyed by fungus, mold or microorganisms. This provides asbotkani long-term operation even in conditions of frequent contact with high humidity.
Resistance to chemicals. The material is not destroyed by contact with weak acidic and alkaline solutions. This increases the period of its use in aggressive environments, asbestos fabric can be used in boiler rooms and in the insulation of various industrial equipment.
Minimum electrical conductivity. Due to its dielectric properties, the asbestos sheet is used as an insulator. It practically does not pass electricity.
Low sound conductivity. Fabric with asbestos fibers can be used as a noise insulator, as it has the ability to block the propagation of sounds.
Such a set of characteristics has ensured wide application in various industries: asbestos fabric is in great demand as a refractory, electrical, heat, and noise insulating material.
The main brands of asbestos fabric: properties and features
The production of asbestos fabric is carried out in accordance with GOST 6102-94. Depending on the percentage of mineral fibers in the composition, various brands are distinguished, there are only a few dozen of them. Grades are classified, among other things, by the binder used in the composition, on which the strength and durability of the finished material depends. The most popular varieties:
AT-1C. This is an asbestos fabric made on the basis of natural cotton fibers, it can be used withI for the manufacture of rubberized canvas. It contains up to 85% of mineral components, the material is able to withstand heating up to 400 degrees Celsius.
AT-2 and AT-3. These brands are distinguished by a lower concentration of mineral fiber, it reaches 81%. The material can be used in the manufacture of asbestos-textolites; various types of insulation are made from it.
AT-4 and AT-5. Brass wire is used as a binder for this type of fabric, not textile fiber. As a result, the material acquires very high strength and tear resistance, which makes it possible to use it in extreme conditions.
AT-6. The concentration of mineral fiber in the fabric of this brand reaches 95%, the binder is cotton fiber.
AT-7, AT-8 and AT-9. Such brands are resistant to strong heat, they are able to withstand temperatures up to 450 degrees. The composition contains up to 90% mineral fiber.
AST. This material is based on asbestos threads and fiberglass, they are twisted in a special way and intertwined with each other. The resulting fabric is used in the manufacture of heat-resistant clothing.
Only the basic grades of asbot fabric that are most widely used are listed. Based on them, special materials with improved performance characteristics are manufactured.
Rules for working with asbestos fabric
During work with asbestos fabric, microscopic dust containing asbestos particles is released into the air. Its permissible concentration should not exceed 2 mg/m3 in a single contact or 1 mg/m3 during a work shift. In order to prevent the negative impact of asbestos dust on the health of workers, it is necessary to provide them with personal protective equipment and comply with the established standards for ventilation of industrial premises.
The use of chrysolite-asbestos, which does not have a fibrinogenic effect, makes it possible to reduce the carcinogenicity of production. This material is gradually replacing conventional asbestos, which can pose a threat to human health.
The produced material is packed in plastic bags or polymer film, the rolls are fixed with twine. Since asbestos is not a combustible material, it has a low fire hazard. Proper handling of asbestos fabric and compliance with storage standards extends its useful life. The material is stored in dry ventilated rooms in sealed packages. During transportation, the asbestos cloth is moistened with water to prevent the spread of large amounts of dust.
Directions for the use of asbestos fabric
Due to its advantageous set of characteristics, asbestos fabric has become widespread in various industries. It is used in the following areas:
Production of heat-resistant suits that are used by firefighters and rescuers. They are made from fabric that can withstand very high temperatures and not ignite when in contact with an open flame.
Production of asbestos-textolite. It is a layered durable material with dielectric properties and high mechanical strength. Layers of asbot fabric are impregnated with special resins and joined together by hot pressing.
Production of heat-insulating plates. Asbot fabric helps to improve the energy efficiency of various buildings and structures, as well as slow down the spread of noise.
Production of materials used in fire extinguishing. Refractory material is also used in the construction of furnaces and the installation of boiler equipment.
This is not a complete list of uses. Asbot fabric is used in industry, construction, tailoring of overalls, insulating gaskets and many other products. The use of environmentally friendly material without carcinogenic hazard further expands the possibilities of application in the manufacture of various types of clothing and the production of insulators for buildings and structures.
The RTI Evraz catalog contains a wide range of types of asbestos fabric with different characteristics, our consultants will help you choose the right type of product and place an order for a wholesale or retail batch at a bargain price. The high quality of products and compliance with standards are guaranteed.
Environmental performance of asbestos fabric
The fibers that make up the asbestos fabric can be easily split into smaller ones. The human body is affected by asbestos dust itself, which enters the lungs during breathing. This dust leads to the formation of malignant tumors. For this reason, it is essential to use personal protective equipment. In addition, to reduce the risk of inhalation of asbestos dust, materials from this substance are painted or covered with a film. And items that have not been treated with protective materials should be placed in places with a high level of air exchange.
Despite the fact that many states prohibit the use of this material on their territory, the fabric still does not lose popularity. Experts are trying to create products that replace asbestos fabricHowever, the quality of such materials leaves much to be desired.
You can buy Asbestos cloth АТ-19-М-70 GOST 6102-94 from us at the best price in Ukraine. A wide range of products allows us to quickly and efficiently fulfill any order, helping to complete any construction work on time.
