Jet Dyeing Machine

Jet dyeing Machine generally used for dyeing fabric, dyeing polyester, dyeing clothe and others type of dyeing. Jet m/c resemble becks in that a continuous loop of fabric is circulated through the machine. There are different types of dyeing technique applied in dyeing machine like disperse dyes, reactive dyes, vat dyes, acid dyes, organic dyes etc. After Jet m/c fabric goes for Slitting Machine. 

Features of Jet dyeing machine of Dyeing Factory:

  1. A high speed jet of dyeing machine for vat dyes liquid created by transports the fabric through the cloth guide tube of the jet machine.
  2. A jet machine for acid dyes have cloth guide tube for each loop of fabric being processed.
  3. A powerful pump circulates the liquor through a heat exchanger outside of the main vessel and back into the jet machine for reactive dyes
  4. The fabric moves at high velocity of 200-800 meters per minute while it is in the cloth guide tube of dyeing factory.
  5. The fabric leaving the cloth guide tube enters a larger capacity cloth chamber and gradually advances back toward the cloth guide tube.
  6. This machine is also used for dyeing polyester

Advantages of Jet Dyeing Machine for Organic Dyes:

  1. It is used for dyeing polyester in dyeing factory
  2. Vigorous agitation of fabric and dyeformulation in the cloth tube increases the acid dyes rate and uniformity.
  3. Rapid circulation of fabric through the machine minimizes creasing because the fabric is not held in any one configuration very long.
  4. Lengthwise tension for disperse dyes on the fabric is low so the fabric develops bulk and fullness of handle.
  5. Dyeing at high temperature of about 130C gives rapid dyeing, improved dyeutilization, improved fastness properties and makes possible the elimination of carriers required when dyeing at lower temperatures.
  6. The lower liquor ratio used in jetdyeing allows shorter dye cycles and saveschemicals and energy.

Standard Operating Procedure of Dyeing Factory:

Autogarment dyeing factory follows its own quality management system. Every department has a SOP (Standard operating procedure). According to SOP all function are being done. There are some essential forms and register for proper functioning each department. All function are documented in respective department.

We follow 4 point system for inspection of greige fabric and finished fabric. In this system AQL limit is 28. Our main customer is Autogarment dyeing factory. we purchased yarn, dyes & chemicals. There is a checking system of every raw material. If its quality is pass, then its goes for using in production. Our main production division is knitting, dyeing and finishing.

A standard production processes of dyeing factory follow:

Knitting

↓

Greige fabric inspection

↓

Batching

↓

Dyeing

↓

Finishing

↓

Inspection of Finished fabric

↓

RFD (Ready for Delivery)

A dyeing factory have a standard Organogram. According to Organogram all recruitments are being done.

DYEING M/C TEMPERATURE RECORD (BEFORE & AFTER INSULATION):

Before InsulationAfter Insulation
DateTime For Temp. Increasing (45-98)°CTime For Temp. Decreasing (98-80)°CDateTime For Temp. Increasing (45-98)°CTime For Temp. Decreasing (98-80)°C
18.12.201209m46s06m02s17.01.201308m17s05m44s
20.12.201208m30s05m48s23.01.201307m20s05m00s
22.12.201209m10s04m50s29.01.201308m25s04m07s
06.01.201312m30s06m34s30.01.201308m22s05m25s
07.01.201319m03s10m40s31.01.201309m07s06m10s
18.12.201215m46s08m02s05.01.201311m30s07m13s
20.12.201215m17s08m26s06.01.201314m42s07m36s
22.12.201216m20s09m10s07.01.201311m11s07m24s
09.01.201314m50s13m35s05.05.201314m10s10m15s
10.01.201314m53s08m02s06.05201312m12s07m20s
12.01.201318m03s09m33s07.05.201311m51s08m15s
13.01.201314m53s08m34s08.05.201310m09s07m02s
16.06.201308m40s07m00s01.08.201305m22s05m59s
17.06.201308m20s07m20s02.08.201305m10s06m30s
18.06.201309m10s05m30s03.08.201306m00s05m00s
19.06.201310m25s07m10s04.08.201306m52sO6m22s
24.05.201312m55s07m45s01.07.201310m03s05m19s
25.05.201314m40s05m20s02.07,201309m08s04m10s
26.05.201313m45s09m15s03.07.201310m01s04m50s
27.05.201315m20s05m19s04.07.201310m20s04m45s
24.05.201319m20s09m10s27.07.201310m03s06m10s
25.05.201318m16s05m55s28.07.201310m15s05m01s
26.05.201316m54s08m15s29.07.201311m25s07m10s
27.05.201318m37s07m45s30.07.201311m20s06m04s

STEAM VALVE TEMPERATURE RECORD (BEFORE & AFTER INSULATION):

Before Insulation
DateTemp. of 01´´ ValveTemp. of 02´´ ValveTemp. of 04´´ ValveTemp. of 06´´ Valve
19.12.201298°C95°C100°C98°C
20.12.201295°C98°C97°C96°C
22.12.201298°C97°C95°C95°C
23.12.201295°C98°C98°C98°C
     
After Insulation
DateTemp. of 01´´ ValveTemp. of 02´´ ValveTemp. of 04´´ ValveTemp. of 06´´ Valve
03.03.201342°C38°C36°C42°C
04.03.201340°C38°C34°C40°C
05.03.201336°C37°C35°C36°C
07.03.201332°C39°C40°C41°C

DYEING M/C HEAT EXCHANGER TEMPERATURE RECORD (BEFORE & AFTER INSULATION):

Before Insulation
DateHeat Exchanger Temp. When M/C Temp. Inside Temp. is 100°C
18.12.2012128°C
19.12.2012130°C
20.12.2012130°C
22.12.2012132°C
After Insulation
DateHeat Exchanger Temp. When M/C Temp. Inside Temp. is 100°C
09.01.201368°C
10.01.201370°C
15.01.201365°C
20.01.201372°C

Findings for Disperse Dyes and Other Dyes in Dyeing Area

  • Need to clean & waterless beside of Overflow machine area
  • Passage marking for all dyeing section
  • Need to clean color room (Found poly, west water, empty dram)
  • Electric cables & Electric board should be transfer in old color room. It’s found open & coverless.
  • Danger sign for SDP board
  • Need to create separate area for empty chemical dram or container & it’s also designated.
  • Jute bag should be transfer from dyeing area for free passage
  • Some electric cables found coverless in finishing area. It is looking danger
  • Need to area marking for keeping trolley
  • Need to clean in thread store
  • Ensure all worker should use their PPE, in this act need to collect a list of PPE

Limitation of Jet Dyeing Machines:

Some limitation of jet m/c is described below-

jet dyeing for dyes for dyeing polyester
Jet Dyeing Machines
  1. Capital and maintenance costs are higher for this machine and for disperse dyes
  2. Limited accessibility makes cleaning between dyeing and sampling for colorduring the dye cycle difficult.
  3. The jet action tends to make formulations foam in partially flooded jet machines for organic dyes.
[1] Md. Ferdus Alam, B.Sc. in Textile Engineering, Southeast University, Cell # 1723300700, Email- ferdus.j@gmail.com