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Continuous dyeing machine
Continuous dyeing machine
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Continuous dyeing machine

  1. 1. CONTINUOUS DYEING MACHINE Prepared by: Danish Raja Danish_raja1@hotmail.com Mehran university of engineering and technology (m.u.e.t) jamshoro
  2. 2. Contents: • What is dyeing? • What is continuous dyeing process? • Types of continuous dyeing machine? • Manufacturers of continuous dyeing machine? • Conclusion.
  3. 3. What is dyeing • Dyeing is the process of imparting colors to a textile material. • Dyeing can be done at any stage of the manufacturing of textile- fiber, yarn, fabric or a finished textile product including garments and apparels. • The property of color fastness depends upon two factors- selection of proper dye according to the textile material to be dyed and selection of the method for dyeing the fiber, yarn or fabric.
  4. 4. Continuous dyeing process • Continuous dyeing has been found to be most suitable for woven fabrics. • The textile substrates are feeded continuously into a dye range. • A Continuous dyeing process typically consists of dye application, dye fixation with heat or chemicals and finally washing.
  5. 5. TYPES OF CONTINUOUS DYEING MACHINE There are mainly three types: 1-Pad-steam process 2-Pad-dry process 3-Thermosol process
  6. 6. 1-PAD STEAM PROCESS • This technique is mainly used for dyeing. It is particularly suitable for the application of direct, vat, sulphur and reactive dyestuffs. • It includes the following steps:  Impregnation by padding  Steaming (at about 100 °C)  Additional impregnation of the fabric with developing agents (e.g. reducing agents in vat or sulphur dyeing)  Washing and rinsing.
  7. 7. 1-PAD STEAM PROCESS • In this process, the fabric is padded with the dye solution with 60-800C. • Then fabric is passed through drying chamber. • After chamber the fabric is padded with chemical (NaOH+Salt). • Then the fabric is passed through a chamber at 102 ̊C for 30 sec. Then fabric is washed in open width washer.
  8. 8. 2-PAD DRY PROCESS  Steps: • Fabric is first padded in a padder with reactive dye in presence of an alkali. • 2-Padded fabric is then passed through a squeezing roller into a dryer. As a dryer cylinder, stenter etc may be used. During drying due to higher temperature fixation of dye in fibre increases and at the same time water is removed by evaporation. • 3-After drying fabric is washed in a washing machine to remove unfixed dye.
  9. 9. 2-PAD DRY PROCESS
  10. 10. 3-THERMOSOL PROCESS • Thermosol method is continuous method of dyeing with disperse dye. • Here dyeing is performed at high temperature like 180-220°C in a close vessel. • Here time of dyeing should be maintained very carefully to get required shade and to retain required fabric strength.
  11. 11. 3-THERMOSOL PROCESS 1- At first the fabric is padded with dye solution using recipe in a three bowl padding mangle. 2- Then the fabric is dried at 100°C temperature in dryer. 3- For dyeing, infra red drying method is an ideal method by which water is evaporated from fabric in vapor form. This eliminates the migration of dye particles. 4-Then the fabric is passed through thermasol unit where thermo fixing is done at about 220°C temprature for 60-90 seconds depending on type of fibre, dye and depth of shade. 5- In thermasol process about 75-90% dye is fixed on fabric.After thermo fixing the unfixed dyes are washed off along with thickener and other chemicals by warm water. 6- Then soap wash or reduction cleaning is done if required.
  12. 12. Copyright © 2000 Harcourt, Inc. All rights reserved. 3-THERMOSOL PROCESS
  13. 13. MANUFACTURERS: • Followings are the manufacturers of the continuous dyeing machine.  Benninger; Shanghai Singularity machines; China manufacrurers;and Etc
  14. 14. CONCLUSION • The continuous dyeing machine can easily dye any textile matirial with a high speed. • Its speed can vary between 50 to 250 meters per minute. • According to Industry estimates Continuous dyeing is a popular dyeing method and 60% textile matirials are dyed.
  15. 15. REFERENCE • http://textilesite.blogspot.com/2012/03/dyei ng-process.html • http://www.fibre2fashion.com/industry- article/14/1332/some-of-the-process-sequ ence-with-dyeing
  16. 16. Copyright © 2000 Harcourt, Inc. All rights reserved.
  17. 17. Any Question?

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