Textile Printing Techniques by Sukhvir Sabharwal

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Textile Printing Techniques.

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Textile Printing Techniques by Sukhvir Sabharwal

  1. 1. . d . : . ,..
  2. 2. I--
  3. 3. Textile PrintingThe application of color to a fabric in a design or pattern(localized dyeing)Modern printing generally incorporates one of the following techniques: Flat-bed screen printing Rotary screen printing Engraved roller printing - Heat transfer printing*- 17-2 Textile Mntlng
  4. 4. I Types Of Printing Processes Automatic Flat Screen Printing A Approximately 17%of printed goods B. Advantages 1. Largerepeats 2. Multiple strokes for pile fabrics C. Disadvantages 1. Slow 2. No continuous patterns Rotarv Screen Printing k Approximately 50% of printed goods B. Advantages 1. Fast 2. Quick changeover of patterns 3. Continuous patterns C. Disadvantages 1. Design limitations 2. Small repeats& Engraved Roller PrintingI A Approximately 26%of printed goods B. Advantages-- 1. High design capability a. Finedetail b. Multiple tones Textile Mnnng 17-3
  5. 5. C. Disadvantages 1. Copper cylinders very expensive 2. Not economical for short runs 3. Requires highly skilled workersHeat TransferPrintingk Approximately 7% of printed goodsB. Advantages 1. High quality prints 2. Fewer seconds 3. Economical for short runs 4. Practically pollution freeC. Disadvantages 1. Slow 2. Primarily only for polyester
  6. 6. Steps In Printing Process1. Preparation of print paste2. Printing of fabric3. Drying4. Fixation of dyestuff5. Washing - off T xfe Prlntlng 1 7 4 e tl
  7. 7. I Preparation Of Printing PastesType of specific formulation used depends on the fiber, the colorantsystem used and, to some extent, the type of printing machine.TvDicaZ Inmedients Used Include: Dyes or pigments Thickeners Binders, cross-linking agents . Sequestrants Dispersing agents - surfactants Water-retaining agents (humectants) Adhesion promoters Defoamers Catalysts Hand modifiers
  8. 8. Flat-Bed Screen PrintingMechanization of hand screen processFabric glued to blanketScreens rise and fallPrinting done while screen i down position nRod or blade squeegee systemUp to four strokes possibleSlow process TextfleMntlng 17-7
  9. 9. Figure 17- 1 Flat-Bed Screen PrintingTake-up Dryer CuringOven PrintingArea 1 7 6 Textile Rlnting
  10. 10. TextpeMntlng 17-9
  11. 11. Rotary Screen PrintingContinuous screen printing processFabric glued to blanketFabric moves under rotating screensRod or blade squeegee systemFine adjustments easily madeSpeeds up to 100 yd/min 17-10 Textlie Mntlng
  12. 12. IFigure 17-2 Rotary Screen Printing Squeegee Principle
  13. 13. 1 Figure 17-3 Diagrammatic View Of A Roller-Printing System-- 17-12 Textile Wntlng
  14. 14. Heat Transfer Printing Advantages - Easier handling of units - Easier training of operators -Better registration and clarity - Fewer seconds - Inventory i paper n -Pollution - free Disadvantages a -Slow - Limited to synthetic fibers, mainly polyester_- Textile Printing 17-13
  15. 15. Ef / t 17-14 Textlle Mnling

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