When it comes to natural environmentally friendly building materials, one of the first materials, which recall is a traffic jam.Today it is used in different areas and for different purposes.Technical cork is used for heat and sound insulation of buildings, as well as support for many of flooring, such as laminate.What are the characteristics of this material, why he is so popular - describe in this article, as well as focus on the technical characteristics and methods of application of technical cork.
- Features cork materials and their advantages
- Technical cork rolls
- Specifications cork
- application of technical cork rolls
- Technical cork sheet
- Specifications cork sheet
- application of technical cork sheet
Features cork materials and their advantages
Why cork materials are considered environmentally friendly?The fact that the raw material for their production is a tree bark - the cork oak.And in the production of the final ma
cork oaks grow in the Mediterranean countries, of which Portugal is considered to be the largest supplier of cork materials.When the cork oak reaches the age of 25 years, with his first remove the bark.Due to intense natural regeneration bark grows back and the tree does not die.After 9 years we can again remove the bark from the tree, and every quality of bark removal is getting better and better.
After removing the bark is dried in natural conditions, and then sent to the factory, which produces a variety of products.For production technical cork bark is crushed and then ground bark pellets are compressed under pressure and treated with steam.It does not use additional binders, as is the case with artificial polymers as a part of the tube enters Suberin - natural adhesive material in which more than 45%.Technology of production of cork material called sintering, which is why the position of technical cork agglomerate cork is called black and white cork agglomerate.They differ from each other only in that the sinter is used for the white bark of the tree branches, and for black - bark of the trunk.
unique feature of cork is its honeycomb structure.For every 1 cm3 stoppers accounts for up to 40 million. Honeycomb cells.Each cell has the shape of a polyhedron with 14 faces an inner space filled with a gaseous mixture the polytope.It is thanks to this kind of structure of cork materials have excellent thermal insulation properties, and do not allow water and gases.Cells are separated by an intercellular septa.
cork materials have a purely technical advantages over the others, and have other advantages that can play a decisive role in the choice of insulating material.
technical advantages of cork:
- Full ecological and hypoallergenic.Because cork material emits no harmful substance nor at rest or under heating or combustion.
- Cork easily recovers its shape after compression or torsion, bending.Material extremely resilient.Even after years of use it does not prominaetsya and tread down, and continues to pleasantly springy underfoot.
- Cork is a natural antiseptic, so building materials from it do not rot and the appearance of mold.
- Cork do not eat rodents and insects.
- cork material is not afraid to ultraviolet radiation and do not miss it.
- not electrified, do not accumulate static electricity.
- cork materials during combustion does not emit phenols, chlorine and cyanide and other hazardous substances.To plug did not burn, it is treated with a special substance, after which it can be attributed to a class G1 (incombustible material).
- Due to the unique structure of natural cork has low thermal conductivity, making it suitable for thermal insulation and thermal insulation of buildings.
- also plug has excellent sound quality, reducing noise coming from the street.
- material is easy to use, durable and versatile.
- Safe for the environment, since recycled natural way.
- Technical cork retains all its properties at low temperatures, so is used in the manufacture of cold rooms.
- Waterproof plug allows you to not worry about the stuff, even in the event of flooding homes.
- as unique features can be identified as follows: plug reduces radiation and insulates against the harmful effects of technopathogenic zones.
also cork material is not afraid of alkalis and other substances.
Depending on the purpose for which it will be used, the plug can be bought technical in two forms in rolls or in sheets.They differ not only in the form of release, but also the thickness of the material.Let us consider the characteristics and features of application of roll and sheet technical cork.
Technical cork rolls
Technical roll tube is also called a cork backing.Usually it produced in rolls 1000 and 1400 mm, but more important is the material thickness.The thickness of the tube coils may be 2 mm, 2.5 mm, 3 mm, 4 mm, 8 mm, 10 mm.
From the above table, you can get information about the technical characteristics of roll and sheet products technical cork.
to the above may be added that the service life of the roll substrate is the same as operation of the building, it is one of the most durable natural materials.
Humidity material a maximum of 7%, which is extremely important during the installation and continued operation.
Permanent deformation 0,2%.Due to such low rates of cork material is not crushed and returned to the original shape after long loads.For example, after only 1.5 minutes after cessation of exposure to residual strain of only 0.35% after 15 minutes - is 0.25%, and after 150 minutes - only 0.17%.
roll tube is inert with respect to various chemicals.
Note sound reduction index .When the thickness of tube 2 is 16 mm it dB and with greater thickness (4 - 10 mm) of the sound absorption coefficient can be increased to 22 dB or more.
also important resistance sonic boom - 12 dB.
deformation modulus of elasticity 2000 - 2500 kg / cm2.This suggests that the material is capable of withstanding the enormous forces without significant deformation and does not undergo degradation.Thanks to these properties, it can be used on many construction sites, where the pressure of heavy equipment, such as very large.
application of technical cork rolls
some roll technical cork is used as a heat-insulating and sound-proofing material. placed underneath the laminate, linoleum, flooring and parquet paneling, serving as a substrate for reducing the transmission of sound from the flapping motion on the wooden floor .Also, the substrate serves as insulation between the base under the floor and the flooring itself.
When equipment is also used underfloor roll tube and performs all the same functions.
important advantage of using the roll stopper in the regeneration of the sexes is that the material allows leveling small irregularities in the substrate and has excellent shock-absorbing properties.
roll stopper also can be used for thermal insulation and sound insulation of walls and ceiling, but it is less convenient than using a sheet of technical cork.The fact that the roll stopper must straighten to be mounted on the surface, and sheets and so smooth.The substrate roll, cork floor is ideal, as it presses the floor.If the insulation of walls and ceilings it is inconvenient.
When laying the technical cork roll on the floor the room temperature should not be below +10 ° C, humidity above 75%.Laying can start a day later after being unpacked and roll stuff straightened.Screed floor should be smooth, clean and dry, the residual moisture should not exceed 2.5%.In the process of mounting the roll is cut into required lengths, which are stacked on the floor surface without gaps.Joints glued carefully.Incidentally, the roll can not be fastened to the floor substrate mechanically, only stick.
Technical cork sheet
Technical cork in sheets differs from the roll only material strength and size.Typically it is 940h640 plate thickness of 2 mm to 10 mm.The most common positions are cork sheet thickness of 4, 6 and 10 mm.On the technical sheet stopper price depends on the thickness of the material, because it affects the technical properties.
Specifications cork sheet
Table features cork sheet clearly shows that the so-called white agglomerate has a great sound absorption and, therefore, more suitable for soundproofing rooms.
In addition it should be noted that the material is easily restored after applying pressure.For example, in the provision of load 7 kg / cm2 of compression is 10%, and an hour later already 0.7%.
Sound absorption coefficient cork sheet, measured at a frequency of 2.1 kHz, 0.85.This significantly reduces noise, and completely eliminate reverberation.This is especially important for acoustic recording studios and movie theaters.After reverb - is the spread of the sound reflected sound - echo.
application of technical cork sheet
Sheet technical cork is used for thermal insulation and soundproofing rooms.She insulate the floor, walls, floors and ceiling.The room, which is isolated technical cork is completely absent echoes and minimal noise from the street.
Technical plug may be in any environment, so it can be used in the finishing of the exterior facade, and interior decoration, and as a substrate for flooring and the system "warm floor" as well as the roll stopper.As a technical cork insulation can be used in the ceiling and on the floor and on the walls and on the roof and on the outer walls.
Important!The only limitation is the application of technical cork - it's production facilities, which produces metal processing.The fact that metal chips quickly clog pores congestion, and it ceases to perform its functions.
combined with other materials, technical cork significantly reduces noise and reverberation.Also cork is used to reduce the vibrations coming from the machines and other mechanisms, whether they have any load on the plug.
best sound absorption cork provides a range of high frequencies above 1.5 kHz.This makes it possible to completely isolate the room from sudden loud noises coming from the street, such as dogs barking or screaming.Also with soundproofing partitions between rooms, you can isolate the room so that you will not hear the stereo or TV.
But to reduce vibration noise, which is transmitted by floors, or vibration mechanism, the plug is not capable.Actually, like any sound insulation.
For best acoustic room finished with cork complex: ceiling + wall + floor .To improve the acoustic properties of cork, it is desirable not to close its other finishing materials.You can, for example, used cork decorative panel in addition to the technical traffic.
Mount Technology Technical cork sheet does not differ from the installation of the roll substrate.The only difference is that the sheeting may be laid immediately because he is so smooth.By surface sheets are glued with special glue, carefully butt.Sometimes the sheets are fixed mechanically, but much less frequently.
And finally the advantages of sheet cork roll before that notice installers professionals:
- Steel tube denser.
- easier to install, since it can handle one man, in contrast to the roll, which certainly needs an assistant.
- Reserve sheet no need to align the plug.
- preferred crop under the required size.
- Sheet cork does not break and crack, as it is not rolled up.
technical cork - versatile material that is used in almost all places where insulation is needed: both indoors and outside.The undeniable advantage is waterproof and nonsusceptibility influence mold, rodents and insects.The only drawback of technical cork - a high price compared with synthetic insulating materials of the same class.