GRADES OF VISCOSE RAYON
Swicofil offers Viscose Rayon as follows:
- flat FDY
from dtex 56 to dtex 660
centrifugal of continuous spun
0 tpm up to 90 tpm
available in spundyed
- high tenacity
- spun yarn
from Nm 2.0 up to Nm 10.0
For more information, please contact Swicofil concerning the requirements of the product you are looking for.
If you are looking for viscose related products like modal, cupro or lyocell, please click on the according link.
MODIFICATIONS OF RAYON
There are four major types or modifications of rayon. Understanding each type should help clarify differences in product performance.
- Regular rayon
"Regular rayon" has the largest market share. It is typically found in apparel and home furnishings and identified on labels by the term "viscose." The distinguishing property of regular rayon is its low wet strength. As a result, it becomes unstable and may stretch or shrink when wet. Dry cleaning is usually recommended to preserve the appearance of fabrics made from this fiber. If machine washed, untreated regular rayon can shrink as much as 10 percent.
- high wet modulus
High Wet Modulus (HWM) rayon is a modified viscose that has virtually the same properties as regular rayon, plus high wet strength. HWM rayon can be machine washed and tumble dried and perform much like cotton in similar end uses. HWM rayon can also be mercerized, like cotton, for increased strength and luster. The terms frequently used to describe HWM rayon in apparel include "polynosic" rayon or the trade name MODALTM.
- high tenacity
High Tenacity Rayon is a modification of "regular rayon" to provide exceptional strength (two times that of HWM rayon). High tenacity rayon is primarily found in tire cord and industrial end uses. It may be finished, chemically coated, or rubberized for protection from moisture and potential loss of dimensional stability and strength during use.
Cupramonium Rayon is another type with properties similar to those of viscose or regular rayon. The manufacturing process differs somewhat from that of regular rayon and is less environmentally friendly. As a result, cupramonium rayon is no longer produced in the United States.
Other types of rayon have been developed for specialized end uses. These include disposable, non-woven markets, and high-absorption rayon fibers with moisture-holding properties for disposable diapers, hygiene and incontinence pads, as well as medical supplies.
Microfibers are not a type of rayon, but rather a very fine fiber that can be manufactured from either regular or HWM rayon. Microfibers are generally less than one denier in diameter. Rayon microfibers have been successfully produced at 0.9 denier. Fabrics from microfibers are very drapable and silk-like in hand and appearance.