Archive for the Fabrics category

Cotton Voyage – Fibre 2 Fashion

Posted under Fabrics by Joyce on May 25th, 2007 9:10 pm

Cotton has sustained its position as the most versatile fiber in the world, even after nearly eighty centuries. None of the other fiber has such characteristics to obtain amicable results which cotton has.

Cotton has several uses and a thousand faces, it is well known for its usefulness, look, presentation and above all the comfort it gives. It generates millions of employment as it moves from yarn to final products.

Prior to reaching our wardrobes, cotton goes on an extensively hectic voyage that takes it around the world. Several players are engaged in the each phases of production. The following is a brief outline of the cotton voyage in the textile industry.

Production of Yarn

Emerging technologies have resulted massive developments in the textile industry. Machines have been modernized and now many operations are fully automated with computerized systems. The speeds of machine have been substantially increased.

At many mills the opening of cotton bales is fully automated. Lint from bales is blended together to produce a uniform fiber properties. To make sure that the automated feeding machines performs in an efficient way and the properties of fibers are uniform, computerized system dictates the bales for production and feeding as per the fiber properties.

The mixed lint is blown by air via chutes to clean, and carding machines separate and brings fibers in line to a slender web. Carding machines can process cotton at 100 pounds an hour. Following the procedure, the web of fibers that are at the front of the card is driven into funnel-shaped equipment called a Trumpet, providing rope-like thread known as sliver.

At a time, eight threads of sliver are blended in the drawing process. In recent years, drawing speeds have increased considerably, which at present is beyond 1,500 feet a minute.

Then roving frames draw/draft the slivers out finer, adds a little twist – which makes it thinner and tighter in anticipation of attaining the yarn thickness/count required for weaving or knitting fabric.

Open-end spinning with rotors, which can spin 5-6 times faster then a ring spinning machine, are getting more admiration. In this process, the yarn is made straight from sliver, eliminating roving process.

Other spinning operations have also sweep off the requirement for roving, and limitation of ring and open-end spinning that is mechanical twisting. These systems utilize compressed air currents to steady the yarn.

These operations result tightly wounding of yarns around bobbins/tubes, as well as prepares the yarn for fabric manufacturing.

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Copyright © 2007

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Fibre2Fashion has emerged as a distinctive B2B platform for global Textile, Apparel, Fashion and Retail and allied industries. To read more articles on Textile, Fashion, Apparel, Technology, Retail and General please visit http://www.fibre2fashion.com/industry-article/

Textile Related to Earth: Geotextiles

Posted under Fabrics by Joyce on May 24th, 2007 9:11 pm

As its name suggests Geotextiles refers to textiles related to earth or soil. When any permeable material used with rock, soil or earth it is termed as Geotextiles. The basic function of this technology is to prevent soil erosion to strengthening heavy concrete structures. This technology has not yet gained much attention in India, but is widely used in many countries for construction of bridges, roads, railway tracks to improve its strength. Many researchers have view that this technology is not newly developed but is in use from past thousands of years.

Formation of Geotextiles

Geotextiles can be formed of synthetic fibers, natural fibers or combination of the two. In past Geotextiles were made of natural plant fibers while today are usually formed of synthetic polymers such as polyester, polypropylene (PP), polyamides (PA) and polyamides (PA). Geotextiles made from natural fibers are less durable as they get decomposed with passage of time.

Choice of formation depends on the required properties and service life for which it is used. For example, natural fiber base Geotextiles is used for erosion control mats where durability is not a critical factor.

Natural Fiber Based Geotextiles

Natural fibers like Jute and coir have special applications. These different fibers degrade at different rates. Coir geotextiles degrade in 2 to 3 years while jute degrades in 1 to 2 years. Because of this property coir is used in situations where vegetation takes longer to establish, and jute is used in low rainfall areas as it can absorb more moisture. Also used for rural unpaved roads.

Advantages

1. Natural fiber-based geotextiles are environmental friendly.
2. Its biodegradable nature has certain cost-effective applications in erosion control and re-vegetation.
3. It is helpful in quick establishment of vegetation.
4. It also helps in dust control, sand dune formation, wind erosion control and stabilization.

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