Viscose is a regenerated
very fine , regular filament or
staple fibre .viscose rayon is
made by reconverting
cellulose from a soluble
xanthate from to tough fibres
by washing in acid.
What is viscose rayon fibre ?
It is the oldest regenerated cellulose fibre.
It is biodegradable & renewable polymer.
Common sources wood pulp & cotton lint.
Highly purified wood pulp consists of 90-95%
cellulose called chemical cellulose & dissolving pulp.
The process used to make viscose either continous
or batch process.
Characteristics of Viscose Fibre
Soft and comfortable.
Easy to dye.
It does not shrink when heated.
It is biodegradable.
PROPERTIES OF VISCOSE
Dry Tenacity(GPD) : 2.5 to 3
wet tenacity(GPD) : 40 to 50% less
Moisture Regain : 13 %
Lusture : Light to bright
Elasticity : Good
Melting Point : 150%
Elongation Percentage : 20-25%
Temperature and composition of the bath.
Speed of Coagulation.
Length of immersion.
speed of spinning.
stretch imparted to the filaments.
Factor affecting the quality of viscose
Regular rayon and high wet modulus usually blend with many fibers like
polyester,acrylic,nylon,acetate,cotton,flax,wool and ramie.
With polyester , nylon and and acrylic :
Rayon contributes absorbency,comfort,and softness when blended with them.
It alters appearance to create soft luster.
It will decrease the cost.
With flax and romie:
It can help produce appearnce that are typically associated with linen like