why should we prefer synthetic fibres and explain about blending.
Answers
Answer:
Explanation:
Blended fibres are made by combining various fibres to enhance the property of the product. For eg: spandex and cotton is a natural mix for sports clothing and undergarments to improve stretching properties and prevent odour. A blended fabric helps overcome the disadvantages of natural and synthetic fibre.
➢Advantages of Blended Fabrics
⇒The blending of cellulosic fibers with man-made fibers to produce fabrics with improved characteristics has long been accepted throughout the world.
➢Is blending necessary?
⇒Blending of cellulosic fibers with man-made fibers to produce fabrics with improved characteristics has long been accepted throughout the world. The use of blended fabrics has been tremendously increased even in India. The price structure and multi-fiber policy of government have increased the use of cellulosic blended fabrics.
⇒The properties of the fibers blended are combined and made into a modified state in the blended fabric. If blending is done carefully the good qualities of the fibers are emphasized minimizing the poor qualities. Blending requires knowledge of both fiber science and art. It enables the technician to produce a perfect fabric for perfect use.
➢Various reasons for fabric blending
⇒The important reason for blending fibers is to produce better performance. By blending we can improve the characteristics that are poor in one fiber, by blending it with another type of fabrics that excel in those characteristics For example polyester when blended with cotton, the resultant fabric has moderate absorbancy which is almost nil in polyester.
⇒To improve the texture, hand or feel and appearance of fabrics blending of wool fibers with polyester produces the desired texture for suiting materials. Viscose, when blended with cotton, improves it’s lusture and softness and thereby enhances it’s appearance.
⇒To reduce the cost This is sometimes one of the important reasons for blending of fibers. The cost of a very expensive fabric can often be reduced by blending with another cheap fiber. For example, expensive wool is blended with cheaper polyester to reduce the cost.
⇒To produce cross-dyed effects Fibres with unlike dye affinity are combined and dyed together so that it produces interesting cross dyes effects as one fiber take up the color and the other retains its original color.
⇒To improve the spinning, weaving and finishing efficiency for example the spinning efficiency of polyester is improved by blending with cotton to produce spun yarns. Blending may be done before or during spinning. It can be done at the opening and blending stage. though it facilitates perfect blending it poses problems and so it is not of much use. Even at the sliver stage overdrawing or roving or spinning frames blending can be done.
⇒Blending overdrawing frame is most commonly used today. slivers of different fibers are combined overdrawing frame depending on blend ratio. They are drawn to get a single silver which is later processed into yarn.
➢Types of Blended Fabrics
⇒Among the various types of blends available today, the most popular fabrics are terry cotton, terry wool, polyester viscose. Polyester cotton viscose blends are most common. Various effects and combinations of properties are produced from these blends depending on the fibers used and the percentage of these fibers used in each blend.