In terms of applications and properties, acrylic fibers are an alternative to natural wool, which is used in blanket, carpet and machine-made carpet textiles. These fibers are very soft and have a low specific weight, and for this reason, products made from acrylic fibers are used for the production of semi-faston textiles and are mainly used in the weaving of machine-made carpets.
In fact, acrylic fibers are synthetic fibers that can be mixed with natural fibers due to their suitable physical properties.
The common goal in all types of spinning to produce carpet yarns is to put the fibers together with the help of warp. Therefore, to perform this operation, machines with different devices are needed. The type of spinning or spinning machine used at the end of the operation chain determines what intermediate product must be fed for spinning at each stage.
In the process of producing acrylic yarns in machine carpets, first the acrylic fibers are opened and washed by dyeing machines and dyed according to the desired sample, then the dyed fibers are delivered to the main production stages in the spinning unit after reaching the appropriate humidity conditions. to be The dyed fibers with different subtleties are carded after entering the spinning mill, and the following goals are followed in the carding stage:
Mixing more fibers with each other, straightening and paralleling the fibers and preparing the wick from the fibers of the wick resulting from carding is entered into the passage. At this stage, depending on the fineness of the final thread, 6 to 10 wicks become one wick. This work is done in three steps. The passage is done and the wicks obtained from this stage are delivered to the finisher machine, and in this machine, by stretching the wicks, a string of very thin fibers called half thread is produced.
The most important device in spinning is the ring. The final stretching is done by twisting the yarns together in this part, depending on the number of layers and the grade of the desired yarn, the tension and warp settings are made on the ring machine until finally a single layer yarn is prepared. The next step is the autoconner machine, the task of this machine is to control and repair the unevenness and thin and thick points of the thread. Then, 2 or 3 threads produced by the Autokner machine are united by the multi-lacquering machine. Finally, the thread is fed to the double-winding machine in the form of a bobbin after several loops.
The work of the dolatab machine is very similar to the ring spinning machine. The only difference between them is that the production rollers are used instead of the tension rollers in the dolatab machine, spinning the threads in this part gives the final strength to the thread. The yarn obtained from the dolatab machine can be used in weaving.
But at this stage, the heat is usually set. The yarn is given a fluffy state and makes the machine carpet transparent and plump after weaving.
In the heat set machine, the thread passes through the chamber from which steam is emitted and all the color and transparency settings are stabilized by steam on the thread, and the bobbins of the last heat set stage are the same thread that will enter the weaving machine directly.