An overview of Jet Dyeing Machine for Dyeing Factory

by Engr. Kh. Mashiur Rahman | Mar 7, 2014 | Dyeing & Dryer

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

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Greige fabric inspection

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Batching

↓

Dyeing

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Finishing

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Inspection of Finished fabric

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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):

STEAM VALVE TEMPERATURE RECORD (BEFORE & AFTER INSULATION):

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

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-

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.