Nylon melts at high temperatures. If ironing is necessary, always use a low temperature on the wrong side. Polyester melts at medium to high temperatures. Although many people dislike polyester, perhaps do to the double knit fad of the 1950, polyester remains a versatile and important man-made fabric. Blends of polyester give cotton a permanent press property and extend the wear of these blended garments.
Polyester is manufactured in many weights including fiber-fill used in pillows and upholstery.
Threads spun from polyester fibers are strong, wear exceptionally well, and are used extensively in home sewing and manufactured sewing. Rayon is strong, extremely absorbent, comes in a variety of qualities and weights, and can be made to resemble natural fabrics. Rayon does not melt but burns at high temperatures. Rayon drapes well, has a soft, silky hand, and has a smooth, napped, or bulky surface. Rayon will wrinkle easily and may stretch when wet and shrink when washed.