Polyurthane (Spandex, Lycra), popular due to its high performance as a stretch
back material, is used widely in blends with other fibers- cotton, viscose,
polyester, etc- to produce high performance materials. Spandex fibers are
covered with silicon oil- about 10%-15% to prevent expansion+ contraction during
spinning.
In order to control the width + shrinkage of fabric and to prevent crinkles during
dyeing, fabrics are fixed in greige stage at 180-190°C for a period of 30-45
second. During fixing conditions, oil is carbonized and firmly affixed to the
fibers.
Fixeclean JT 200 is designed to enable the dye master to fix the fabric while
emulsfying silicon oils. It also eliminates yellowing of fabric and variable
shrinkage values between each lots.
Recipe:
Fixeclean JT 200, 5 ml/ltr
Temp.,C Room Temp.
Pick up 60-70%
Fixe Temp. 180-190°C
Fixe Clean JT 200 is a multifunctional, lubricant and wax emulsifier for PAD application and its
product of CIBA speciality Chemicals
Bleaching process and chemicals are the same as the main component fiber,
mentioned before. In bleaching recipe, wetting agent amount is reduced by half.
Ref: Ciba Specialities Products. |
