Heat setting operation

Heat setting operation

After spinning, the yarn must be subjected to heat operation. When the fibers temperature rises to a certain amount (Glass transition temperature Tg), so molecules are moved in the leaf internal structure and are arranged regularly and the crystal structure of the new polymer chains is created. This leaf cools immediately, thus new order and interior structure of leaf will remain unchanged forever. The temperature and duration of heating the yarn has a significant effect on the physical and mechanical properties of the yarn.

This process is almost a requirement for carpet weaving machines with high technology, because using heat set yarn in a carpet weaving unit increases production efficiency by 7 to 10 percent; this will create a very high figure in a company’s financial period.

THE ADVANTAGES OF HEAT SET YARN

a. By improving the quality of the fibers, carpet fluffing is greatly reduced, which reduces the risk of possible allergies

b. The end of yarns are clearly specified in the carpet woven with these yarns and so-called are pomegranate seeds

c. This heat operation makes the yarn bulky or so-called puffy, so carpet has better coverage and looks fuller under the same conditions of texture density and the yarn grade

d. The carpet which has woven with this yarn has higher reversibility properties and so-called carpet will be softer

e. This process increases the yarn tendency therefore thread breaking is reduced in the weaving process, so the quality and durability of the final product will be increased

f. Heat set yarns are highly resistant to dust absorption and contamination, This will have a significant impact on the health of the carpet

g. The swing of the thread becomes more stable in this process so the fibers are more involved in the structure of the yarn. This will be directly related to the durability and longevity of the carpet

h. The surface of the carpet becomes uniform and smoother, and also the design of carpet is more prominent in carpets which are woven with heat set yarn

i. In the heat set yarns, the color of the fibers is better stabilized; there for the possibility of discoloration after washing is minimized

j. Heat set yarns make the carpet more resistant to the heat

k. It is necessary to heat set the pile yarn for machines with high carpet weaving technology, because using the heat set yarn increases production efficiency and improves fiber quality