This material is currently used in a large number of different industries. Most often, he is praised for the fact that the weight of the product is very small and at the same time, it has excellent thermal insulation. In addition, it can be used as a filter or cushioning material.
Felt in accordance with GOST
Like many other industrial products, a standard was established for the production of this material that regulates the manufacturing process, technical requirements for the product, its properties, characteristics, labeling, packaging, etc. It is worth noting that there are several GOSTs for technical felt. This is very important, since there are several varieties of felt, each of which has its own GOST and its own production process.
- There is a fine-wool felt - GOST 288-72.
- There is a technical semi-coarse felt - GOST 6308-71.
- There is also technical fine-felt felt, which is used in electrical equipment - GOST 11025-78.
- Coarse felt - GOST - 6418-81.
- The last type of felt is yurt. Its GOST is 16221-79.
Felt production
Felt is a non-woven material that can be made by felting from several of the following materials:
- production is possible from 100% animal wool;
- can be made from plant fibers;
- synthetic fibers can also be used for production;
If we talk about the production of natural technical felt, then it can also be made of coarse, fine or semi-coarse fibers. The structure of this product is scaly. Due to the presence of such a structure, in the process of felting this material, the scales adhere to each other, resulting in a very dense monolithic fabric. Most often, 100% sheep wool is used to produce natural technical felt. However, in some cases, rabbit or goat hair is also used. The product that is obtained by replacing the original wool is called Firth and is characterized by the fact that it is softer.
The use of felt in transport
One of the many uses of this product is vehicle insulation or its complete thermal insulation. In addition to this characteristic, it is also able to create sound insulation in the car and reduce any vibration. Since most often this material is made from natural wool of sheep, at high temperatures it will not emit any harmful fumes into the atmosphere. The maximum temperature that technical felt can withstand is about 200 degrees Celsius. In addition to all these parameters, felt is also able to protect the vehicle from moisture.
Use of felt in the living room
This heat-insulating material is perfect for its use in residential buildings. There are several reasons for this. The first reason for the widespread use of this product is that it is considered completely environmentally friendly and harmless to human health. The second reason is the provision of excellent protection of the room from drafts, as well as cold. It can be used as insulation material, laying it in the cracks between windows or doors. The third reason for the widespread use of technical felt, therefore, is that this material perfectly insulates the interior from external odors. Also, the use of this material will provide decent protection against mold and dampness in the room.
However, these areas of application are only a small part of the vast amount in which it is also used. It is used quite a lot in the construction industry, in the manufacture of furniture, as well as in the creation of musical instruments. Such a large number of areas of application of the same material is explained by the fact that during the creation process it is possible to give it various characteristics that are required in a particular industry.
Applying felt by sight
Coarse felt is used in places where the load, as well as speeds are not too high. This type of felt is used in places where the technical requirements are not too high. He also found a place in the construction of foundations as bitumen-impregnated gaskets.
There is a kind of fine-wool felt used in dentures. In prostheses like TU 803-54, this material serves as a gasket, as well as as parts of the prostheses themselves. Most often, hands and finger parts of the foot are produced from it. The thickness of technical felt is 20 mm, 40 or 50. The very composition of this material is 85% merino wool, and the remaining 15 are combed tow.
Semi-coarse-haired material is used in more loaded places, and is also often used as a raw material for the production of small but very durable parts.
Fine-wool felt found its application in instrumentation, in the most critical places. According to its technical parameters, this type of material can be used for the production of parts such as oil seals, gaskets, filters, wicks.
Reviews
It is worth noting that on the Web you can find many different reviews. Firstly, many motorists claim that it is not as good as sound insulation, as they say about it. Secondly, if you put it on the floor of the car, then, most likely, damp will form under the bottom, and the body will rust. You can also find some reviews that despite the ability to withstand high temperatures, it still lights up, but putting out it later is quite problematic.
Although there are positive reviews that indicate that felt can be used, let's say to wrap the vehicle’s engine on a winter night, so that there are no problems starting the car in the morning. This is very true especially for diesel engines.
Felt Specifications
The technical coarse felt of brand A, used for the manufacture of gaskets, is marked GPrA. The release of material is carried out in rolls, the thickness of which is 10-11 mm and a length of 1,700 mm. The bulk density of this species is 0.32 g / cm 3 . The surface density for this type of felt is from 2.56 to 6.4 kg / m 2 . It is used to protect the mechanical components of various machines from dust or any other contaminants.
Semi-rough wool grade A for gaskets is designated as PPrA. The thickness of this roll is 10 mm, and the length is also 1,700 mm. Bulk mass is almost the same as the previous type, however, a little more - 0.34 g / cm 3 . But the surface density has a wider range and is in the region from 2.04 to 6.8 kg / m 2 .
There is another kind of semi-coarse material, but it is used to create oil seals, marking PS. The production of this technical felt sheet. The size of one sheet is 1,400 x 1,000 mm, and the thickness of one sheet is from 19 to 20 mm. Bulk mass is 0.38 g / cm 3 , the density of this plate is from 4.94 to 7.6 kg / m 2 .