What Are Secondary Back Carpets
Carpet backing, as the name suggests, is what it actually means- a backing for the carpet. It is also known as the secondary backing that provides support to the carpet.
The backing is basically that section of the carpet which lies beneath and as such the buyers do not get to interact with that section quite often; until and unless they are really choosy and conscious about the product they are going to purchase. Nonetheless, the secondary backing of the carpet is extremely essential for providing proper shape to the carpet, giving it the structural ability and also protecting the carpet.
The backing for carpets also coming in different styles and textures and are made from assorted materials like jute, foam etc. Both natural fibers and polyurethane can be used as secondary backing for carpets.
The backing for carpets has different components as well, but there are two primary components – the primary backing of the carpet, which is the basic structural element. It is basically the coarse materials used for weaving the carpet and is also used for tufting. The second component is the secondary backing, which is not the structural part, but it does provide overall support to the carpet and allows proper insulation from bacteria, moisture as well as mold. These tend to leach out from the room’s floor and are less coarse.
Before purchasing a carpet, there are various aspects that should be considered – the material of the carpet is undoubtedly important, but it is also important for you to know all about the backing of the carpet. There are many carpet manufacturers offering excellent backing systems of the carpet and specially the secondary carpet, thus making it more environment-friendly. The secondary backing of the carpet is meant for resisting mold, rot, mildew and several other problems that can possibly plague the carpeting system.
Recycling of carpets is also a probable option, which is feasible and there are many organizations that actually promote the recycling process.
Besides carpet backing, carpet padding has also been introduced and is regarded as a great concept by users.
Secondary backing for carpets has become more and more important these days and the concept behind the process has been well explained in this article. After the carpet is dyed, it is sent for secondary backing. The process begins with smoothening of the surface and then application of a proper backing. Secondary backing is given to provide dimensional stability to the carpet while the individual tufts are being locked in place.
The application process is very easy indeed. It is just glued to the basic primary backing with the use of latex. The latex used is generally styrene-butadiene synthetic rubber or SBR and is compounded with huge quantities of typical powdered filler like chalk. Its appearance is somewhat milky. The chemical used is 4-PC and this gives a peculiar smell to the carpet; it is almost like a newly made one.The latex is applied to the back of the carpet. The carpet is passed through the latex puddle. The latex is then forced down using a blade, on the carpet’s back and around the yarn and this locks the backing and the yarn together. Thereafter, a second coating of the latex is applied that holds the carpet’s secondary backing onto the actual tufted material.
This provides the dimensional stability to the carpet.
After the gluing process is completed, both the primary as well as the secondary, the carpet is then sent to the oven for curing the latex. With the imparted dimensional ability, the carpet is able to retain its proper shape and size post installation.
Today, the secondary backing is being provided to the carpets are usually made from woven polypropylene that is made up of a slit films leno weave and spun yarns of olefin forming a stretchable and all synthetic fabric for secondary backing. Jute is also used for making the secondary backings in some cases. However, there are too many problems related with the jute secondary backings as jute tends to rot easily.
Some Secondary backings, though not all, often act as a potential barrier for moisture. These moisture barriers are usually made up of urethane or solid vinyl. This backing has some objectives as well and it is meant for preventing the penetration of water-based spills through carpets. However, these type of secondary backings have disadvantages. They can easily trap moisture and prevent evaporation. This can be very harmful for the floor concrete or the wall, wherever the carpet is to be used. This can as well cause harm to the glue used if the carpet fails to remain well intact in the place. As these pads cannot absorb pet urine or spill, the used material tends to come outwards, thus looking ugly and wicking very often. Some carpets however, have proper polythene backings as well, those are soft and impervious and can trap the liquids very easily, from where they can be collected easily and then cleaned thoroughly prior to soaking.
Some manufacturers are also brining in carpets, both nylon and woolen, without latex secondary backings. This system can actually eliminate the delimitation of the carpet and can also make it lighter in weight, give increased flexibility, would be easy to install and can be recycled even easily. This would also eliminate the factor or ‘new carpet odour’.
The finishing process of the secondary backing involves the use of polymeric resin. The resin, when heated in the curing chamber, creates a texture that resembles foam. Such type of secondary backing can encapsulate the yarn, thus giving extra tuft, with an attached cushion. It also allows water repellency to enable the moisture barrier.
Carpet backings using urethane system provide both the adhesive function and the secondary backing system and also adhere to the carpet back. This also allows the carpet to act like a moisture barrier.
The secondary backings are extremely important for expensive as well as inexpensive carpets. Woolen carpets also need the proper secondary backing for dimensional stability.