Tirupur HosieryThe City of Tirupur in Tamilnadu is synonymous with the knitwear industry and the vests and briefs made in Tirupur are sold in huge quantities not only in India but in the international markets also. Tirupur knitwear industry exported knitwear garments worth Rs. 13000 crores in the year 2012 – 2013. Tirupur contributes about 20% of the total knitwear exports from India. The knitwear garments from Tirupur are exported to US as well as various European countries. There are about 6300 knitwear units in Tirupur employing about 3 lakh people. A substantial part of India’s foreign exchange earnings are made by the Tirupur knitwear industries. The vests and other knitwear garments made in Tirupur are procured in large scale by giant business houses and are sold at popular retail outlets the world over. Tirupur has emerged as a garment manufacturing hub of international reputation. Highly sophisticated machines for the Tirupur knitwear factories are imported from US, Germany, Italy, Japan, Korea and other countries.
The Tirupur hosiery products are for the purpose of absorbing sweat so as to keep the body clean. Low twist yarn of special quality is used by the cotton factories in Tirupur to make vests. The Tirupur vests have excellent absorbing quality thanks to the quality of the fabric. The cotton factories in Tirupur make use of the purest form of hosiery fabric for making vests. The hosiery fabric makes the vests is soft as well as elastic. They are also easy to wash and available in affordable price range.
The hosiery fabrics that are used to make the vests are made by knitting the hosiery yarns. The yarns are made by processing the cellulosic fibers of premium quality. The hosiery yarns are available in a variety of lengths, thickness and colors. The hosiery yarns are very soft so that they are ideal for making vests. They have smooth texture and are durable. They have high tensile strength as well as abrasion resistance. The hosiery yarns only so that these vests are soft to touch, durable, light weight, highly elastic and easily washable.
The cotton fabrics that are used to make vests are subjected to mercerization which is a very crucial process for finishing the cotton fabrics. By way of mercerizing the fabric attains better gloss, more strength and become more hygroscopic. When mercerized, the fabric becomes hydrated and will be similar to original cellulose. The process of mercerization consists of treating the cotton fabric with concentrated solution of caustic soda at a temperature of 17 – 18 degrees C. When treated with caustic alkali, the cellulosic fibers undergo chemical as well as physico-chemical changes and also structural changes. The chemical change leads to formation of alkali cellulose, physical change leads to rapid swelling of the fibers and structural changes lead to change in the arrangement of units in the cellulose molecule. There will be considerable swelling of the fibers and these changes are irreversible.
The factories in Tirupur carry out bleaching of the grey fabric in order to remove the natural coloring matter from the fabric. The Tirupur vests are pure white in color because of the bleaching process. The bleaching of hosiery fabric is carried out in winch machines.