Chemistry, asked by shajisaifina9853, 1 year ago

name a fabric that has a feel of wool

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Answered by itzlehar
2
Blended Fabrics

The variety of natural and man-made fabrics available today offers a wide selection of fibers for use. But all fabrics are not perfect in one way or other. They all have some good, fair and poor characteristics.

Man’s desire, to produce perfect fabrics resulted in the production of blended fabrics. An intimate mixture of two or more fibers spun together is a blend. The individual yarns contain two or more different fibers.

The 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 a 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.

Reasons why fabrics are blended

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 produce the desired texture for suiting materials. Viscose, when blended with cotton, improves it’s luster 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.
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