3. Explain the following:
a. Rayon can be dyed in different colours easily.
b. Acrylic fibres are used for making blankets.
c. Spandex is used for making fitted garments.
Answers
a. Rayon can be dyed with the same dyes that work on cotton, but it often produces deeper, more brilliant colors. Rayon dyes most beautifully with cold water fiber reactive dyes. ... If you use natural dyes on rayon, premordant it as you would cotton; it will not bond to most natural dyes as well as wool does.
b. Acrylic is warm, lightweight, and hypoallergenic. Acrylic can imitate the feeling of natural fibers, but it is much easier to care for. Acrylic blankets are machine washable for easy cleaning at home, and their colors won't fade after consistent washing.
c. When spandex fabric is used in garments, it prevents bagging or sagging of the material. Garments made of spandex gives perfect fit and comfort. Further, in spite of repeated stretching, it will retain its original length and shape. ... 'Solution dry spinning' method is the most used method to produce spandex.