Presentation on Textile Finishing

Presentation on Textile Finishing

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  Shyamoli Textile EngineeringCollege (Affiliated by University of Dhaka) Sub: Industrial Visit Sub Code: TE- 2210
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  My Topic is On Finishing
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  Things to beDiscuss Company Overview What is Textile Finishing? Flow Chart of Finishing Dyeing and Printing Dyeing Dyeing Methods Printing Methods of Printing Types of Textile Finishing Mechanical Finishing Standard Finishes Conclusion
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  What is TextileFinishing? The treatment applied to the textile goods after dyeing and printing process is normally called finishing process.
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  Flow Chart ofFinishing Flow Chart of Textile Finishing (Open Fabric) Slitting ↓ Stentering ↓ Compacting ↓ Final inspection ↓ Packing ↓ Bailing ↓ Delivery Flow Chart of Textile Finishing (Tube Fabric) Dewatering ↓ Drying ↓ Compacting ↓ Final inspection ↓ Packing ↓ Bailing ↓ Delivery
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  Dyeing and Printing Dyeingand printing are processes employed in the conversion of raw textile fibres into finished goods that add much to the appearance of textile fabrics.
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  Dyeing Dyeing is theapplication of dyes or pigments on textile materials such as fibers, yarns, and fabrics with the objective of achieving color with desired fastness.
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  Dyeing Methods Dyeing canbe performed using continuous or batch processes. Yarn dyeing is used to create interesting checks, stripes, and plaids with different-colored yarns in the weaving process. Substances which cause these changes are called dyestuffs.
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  Printing Textile printing is theprocess of applying colour to fabric in definite patterns or designs.
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  Methods of Printing Thereare seven distinct methods presently used to impress coloured patterns on cloth: Hand block printing Perrotine printing Engraved copperplate printing Roller, cylinder, or machine printing Stencil printing Screen printing Digital textile printing Discharge Printing
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  Types of TextileFinishing Washing and Drying: Washing cleans the fabric and removes dirt that might remain following the manufacturing process. Stabilizing: Fabrics also need to be stabilized. These processes are done after washing. They tend to reduce shrinkage, settle condition, and readjust surfaces that might have become stretched during manufacture. Other Finishes: Another element of textile finishing involves applying chemical substances to fabrics in order to achieve certain results. This might make fabrics resistant to static or help them stay wrinkle-free.
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  Mechanical Finishing Raising • Anotherfinishing process is raising. During raising, the fabric surface is treated with sharp teeth to lift the surface fibres, thereby imparting hairiness, softness and warmth, as in flannelette. Calendering • Calendering is the third important mechanical process, in which the fabric is passed between heated rollers to generate smooth, polished or embossed effects depending on roller surface properties and relative speeds. Chemical finishing • Many other chemical treatments may be applied to cotton fabrics to produce low flammability, crease resist and other special effects. Shrinking (Sanforizing) • Mechanical shrinking (sometimes referred to as sanforizing), whereby the fabric is forced to shrink width and/or lengthwise, creates a fabric in which any residual tendency to shrink after subsequent laundering is minimal.
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  Standard Finishes Quality-oriented • Calendering •Decatising • Desizing for woven fabrics. • Pressing • Scouring with detergents, alkaline solutions, or enzymes removes foreign matter. • Shrinking, Sanforization • Shearing or singeing smooths the fabric by removing the fine protruding fibers on the surface of the fabric. Flame singeing is the standard process: the wet fabric is passed through an array of gas burners at a suitable distance to burn the pills off of its surface.
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  Conti…. Design- oriented • Bleaching ofwoven fabrics removes any prior color in order to obtain a uniform color during the dying process. • Dyeing adds color. • Printing adds color and pattern. • Watering adds moiré patterns. Handle- oriented • Fulling or waulking adds weight and density. • Hydrophobic finishing produces a fabric that repels stains or water. • Weighting silk with metallic salts or polymer adds weight and improves handle.
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  Conclusion Textile finishing doesnot include process like dyeing that add color to textiles, but it can make fabrics more welcoming to dyes. Over time, many such processes have been invented. One simple finishing process, steaming, removes wrinkles. Some finishing processes make textiles softer to the touch. Others make them crisper and more durable. There are finishing processes that control shrinkage and others that add special qualities such stain- resistance, waterproofing, or perellence to insects.