PRETREATMENT MACHINES
TYPES
•Batch
•continuous
Batch machines
•Fibre
•Yarn
•Fabric
YARN AND FIBRE
FABRIC PROCESSING - BATCH
•Winch
• Jigger
• Jet dyeing machines
JIGGER• Fabric in open width
• High tension
• Liquor stationary
• M:L ratio 1:3-4
• For fabrics that can withstand tension, tendency to crease
• Desize, scour, bleach, wash
WINCH• Fabric in rope form
• low tension
• Liquor stationary
• M:L ratio 1:20-30
• For delicate fabrics, woolens
• Desize, scour, bleach, wash
KIER – COTTON SCOURING
KIER
• Yarns or fabrics can be scoured
• Temperature above 100 deg C can be used
• Fabric or yarn is piled in the vessel (first in last out)
• Material piling is important (should be even)
• Liquor is heated and circulated
• M:L ratio – 1:3-4
• Very good quality of scouring with high wax removal
SEMI CONTINUOUS PROCESSING MACHINES
PADDING MANGLE
• Two Bowl Padding Mangles with Varying Troughs and Bowl Arrangements
Three-bowl padding mangles with varying bowl arrangements
PADDING MANGLE
•At least two bowls constructed from rubber
•Apply high pressure to squeeze the fabric
•Fabric is left in uniformly saturated, non dripping state
•Pressure can be as high as 50 kg/cm
•Rollers can be 2 meter wide
•Wet expression can be 60-110%
Development after padding
Pad Batch
Pad‐batch (open width)
CONTINUOUS PROCESSING MACHINES
CHEMICAL APPLICATION - SATURATOR
(a) Rope saturator; (b) Open-width saturator
The Optimax saturator The Flexnip Applicator
STORAGE DEVICES
• To provide sufficient time for reaction to take place
• Have high storage capacity to allow sufficient residence and processing speed
• High temperature is maintained with heaters or steam
• Both rope and open width forms can be processed
J-Box (rope form)
Traditional J-Boxes: (a) enclosed J-box; (b) open J-box
• Processing in tension free rope form
• heating is by direct application of steam, through manifolds at
various heights
• by passing through a steam atmosphere in a heater tube
adjacent to the entrance of the J-box
• Can hold 5–20 km of fabric for a dwell time of 1–2 h at a running
speed of 100–150 m min–1
• Productivity of about 130 kg h–1
Steamers
Time – 10-15 (roller bed) 25-20 (conveyor)Temperature – 95o C
Vaporloc system
Pad steam
Continuous processing for fabric
Open Width Range
Washing Ranges
Open Box Washer
Continuous washing machine
Stenter
Rail Introduction Drying Chambers
Fabric Release Part
Bruckner Opti Coat
Clip Stenter
Air circulation in stenter drying
Top Related