A natural and pleasant cool touch
Very high water and moisture absorption
Easy to dye
Natural anti-electrostatic properties
Viscose yarns are divided into staple fiber and continuous filaments yarns.
Viscose staple fiber yarns can be produced using three basic methods:
Viscose staple fibers are produced in one cutting length, e.g. 38/44 mm. This means that there are no shorter or longer fibers within a given production batch, and it is not necessary to comb the classic yarns (combing short fibers). Only the one type is produced i.e. RING.
Viscose fibers as a raw material for spinning yarns are mainly produced in count range from 1.0 to 1.5 den, with a cutting length of 38 to 44 mm.
The basic luster for viscose fibers is bright round , which is why all yarns and products made of viscose fibers have a slight luster as standard. However, on special order, you can produce a full-dull viscose fiber and a mat viscose yarn.
The yarn is produced in a count range of 6 Ne = 100 tex to 80 Ne = 7.4 tex. These yarns are very strong (high tenacity), have a very small amount of thinning, thickening and nepping (high uniformity) and the products made of them have a very nice touch. The disadvantage of these yarns is the higher cost of production (higher price of yarn) and high hairiness (tendency to pilling).
To compensate for the high hairiness, classic yarns with COMPACT and SIRO COMPACT modification are produced. Thanks to them, the hairiness and the tendency to pilling are lower and the overall number of thinning, thickening and nepping is also lower. The disadvantage of the COMPACT modification is the stiffer and rougher touch of the yarn and products made of it.
When using SIRO modification, the final thickness of the yarn consists of two rovings. The yarn is doubled and therefore has very little thinning, thickening, nepping, and its touch is silky. The SIRO modification increases the tenacity of the yarn and the products made of it, and further reduces the hairiness and tendency to pilling. The best level of quality and parameters of viscose yarn has the RING SIRO COMPACT yarn which combines the best of the ring spinning system as well as the SIRO and COMPACT modifications.
The yarn is produced in a count range of 6 Ne = 100 tex to 40 Ne = 15 tex. These yarns have low hairiness (a tendency to pilling) and low cost of production (low price of yarn). The disadvantage of these yarns is a low tenacity and a rough touch of the yarn and products made of it.
VORTEX SPINNING (MVS)
The yarn is produced in a count range of 12 Ne = 50 tex to 60 Ne = 10 tex. There is low hairiness (tendency to pilling) and a nice, soft touch of yarn and products made of it. The disadvantage of this spinning system is higher production cost (higher price of the yarn than for RING version) and low tenacity.
All viscose yarns from above three basic types of spinning can be twisted x 2 (for double yarns) or for a larger number of duplications e.g. x 3, x 4, x 6, x 8 etc. The yarns twisted together can be knotless or with weaving knots depending on the yarn producer and the amount of base yarns in the twisted yarn.
Double or multiple folded yarns can be wound on standard small bobbins weighing from 2 to 3 kg or large industrial bobbins: 4.5-5.5 kg (so-called jumbo cones).
All viscose yarns from the above three basic types of spinning can be covered with wax - they are so-called knitting yarns. The knitting yarns have a lower spin angle which results in a pleasant touch of the yarn and products made of it.
Unlike knitting yarns, weaving yarns are not waxed and usually have a higher spin angle. This is due to the fact that in weaving fabrics tenacity is more important than a nice touch.
Viscose yarns spun from staple fibers are dyed mainly:
-using dope-dyed fibers (dope-dyed = dying in liquid cellulose). It is the cheapest of all types of dyeing, however with a very large MOQ in color – e.g. 20 tons. What is more, it is available in 5-10 basic colors. All black viscose yarns will be produced using black dope-dyed viscose fibers. The yarn produced from dope-dyed fibers will have a shrinkage in boiling water at the level of approx. 5-6%.
- using dyed fibers. This is a slightly more expensive method than dope-dying, however, it has two basic advantages: minimal MOQ in color (only e.g. 2 tons) and zero level of shrinkage in boiling water.
The most expensive and the least used dyeing system is a surface method. It involves dyeing the yarn wound on soft dyeing rolls on plastic and perforated bobbins. The most important advantage of this method is the very small MOQ (about 50 - 500 kg depending on the batch of the dyeing apparatus). The yarn dyed using this method has a zero level of shrinkage in boiling water.
The main advantages of viscose yarns:
a natural and pleasant cool touch
smooth and elegant character of viscose products, great for evening gowns
very high water and moisture absorption (even higher than for cotton and linen)
easy to dye, good color durability
natural anti-electrostatic properties
viscose yarns are used for the production of:
knitted fabrics and woven fabrics
upholstery fabrics (furniture)