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Non Woven Fabrics<br />Presented by: Lucky Vankwani TMM1<br />AsadJafri AMM1<br />
What does wikipedia say?<br />Non-woventextiles are those which are neither woven nor knit, for example felt. Non-wovens a...
Non-woven<br />Introduction<br />Web formation methods<br />Bonding Systems<br />Discussion<br />
Introduction<br />Polymers<br />Fibers<br />Yarns<br />Woven	KnittedBraidedNon-woven<br />Fabrics<br />Textile Medical Pro...
Facts & trivia<br />
Production Rate<br />
Making Non-woven products<br />There are normally two steps for making non-woven products.<br />Bonding systems<br />Web f...
Bonding systems<br />
Bonding systems<br />Bonding systems in non-woven<br />Needled felts<br />Adhesives<br />Heat bonding<br />Stitch bonding<...
Bonding System1) Needled felts<br />Fibres which have no directional frictional properties need to be mechanically entangl...
Bonding System2) Adhesives<br />For most nonwoven applications, fibre-to-fibre friction does not provide enough strength.<...
Bonding systems3)Heat  Bonding<br />When a web of thermoplastic fibres (polyester, nylon) or filament is heated, the fibre...
Stitch Bonding<br />Webs may also be given extra strength by stitching them through with yarns. <br />Such structures are ...
Applications<br />Non-woven materials are used in numerous applications, including:<br />Hygiene <br />Baby diapers <br />...
Web formation<br />
Web formation<br />A nonwoven fabric is basically a web of fibers held together in some way.<br />The web may be made of S...
Web formation through staple fibres<br />
Parallel-laid web from carded fibers<br /><ul><li>In a carded web the fibers are parallel to each other and to the directi...
 PhotosRandom Webs<br /><ul><li>To increase the strength of web in both lengthwise and crosswise directions, cross laid we...
Short, acrylic fibres are made into a wet-laid web from a salt solution. As the water evaporates, the salt chemically bond...
Webs from filament<br />It is possible to tangle filaments together to form a web. Such webs are much stronger than web ma...
New web formation method<br />Spun-laced webs is a new method of entangling fibres to create lace-like nonwoven fabrics us...
Conclusion<br />This section we discussed what non-wovens are and their applications in textile.<br />We also discussed th...
Non woven presentation by Lucky vankwani & Asad Jafri
Non woven presentation by Lucky vankwani & Asad Jafri
Non woven presentation by Lucky vankwani & Asad Jafri
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Non woven presentation by Lucky vankwani & Asad Jafri

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Non woven presentation by Lucky vankwani & Asad Jafri

  1. 1. Non Woven Fabrics<br />Presented by: Lucky Vankwani TMM1<br />AsadJafri AMM1<br />
  2. 2. What does wikipedia say?<br />Non-woventextiles are those which are neither woven nor knit, for example felt. Non-wovens are typically not strong (unless reinforced by a backing), and do not stretch. They are cheap to manufacture.<br />
  3. 3. Non-woven<br />Introduction<br />Web formation methods<br />Bonding Systems<br />Discussion<br />
  4. 4. Introduction<br />Polymers<br />Fibers<br />Yarns<br />Woven KnittedBraidedNon-woven<br />Fabrics<br />Textile Medical Products<br />It eliminates the yarn production process and makes the fabric directly from fibers.<br />
  5. 5. Facts & trivia<br />
  6. 6. Production Rate<br />
  7. 7. Making Non-woven products<br />There are normally two steps for making non-woven products.<br />Bonding systems<br />Web formation.<br />
  8. 8. Bonding systems<br />
  9. 9. Bonding systems<br />Bonding systems in non-woven<br />Needled felts<br />Adhesives<br />Heat bonding<br />Stitch bonding<br />
  10. 10. Bonding System1) Needled felts<br />Fibres which have no directional frictional properties need to be mechanically entangled in order to form felts.<br />This is done using barbed needles.<br />Needle punching<br />Cross section of a needle-punched bonded fabric.<br />
  11. 11. Bonding System2) Adhesives<br />For most nonwoven applications, fibre-to-fibre friction does not provide enough strength.<br />Adhesive can be effective in holding the fibres together.<br />The properties of an adhesive-bonded nonwoven depend to quite a large extent on the properties of the adhesive polymer used.<br />
  12. 12. Bonding systems3)Heat Bonding<br />When a web of thermoplastic fibres (polyester, nylon) or filament is heated, the fibres cross over each other at many points. <br />This way, the resultant fabric has desirable textile properties.<br />Such melt-welded fabrics are called Melded fabrics.<br />Melt-bonding at selected points to give extra stability to a spun bonded geotextile<br />
  13. 13. Stitch Bonding<br />Webs may also be given extra strength by stitching them through with yarns. <br />Such structures are usually more flexible and less paper-like than heat-bonded or adhesive bonded nonwovens.<br />Stitch bonding is based on principle of warp knitting. Sharp-pointed needles pierce the base and loop binding yarns through it.<br />In this way, relatively cheap but stable fibres, with or without pile, can be produced.<br />Carpet underfelts are often stitch-bonded.<br />
  14. 14. Applications<br />Non-woven materials are used in numerous applications, including:<br />Hygiene <br />Baby diapers <br />Feminine hygiene <br />Adult incontinence products <br />Wipes <br />Domestic <br />Technical <br />Filters <br />Geotextiles <br />Carpet backing <br />Composites<br />Astro-turf<br />
  15. 15. Web formation<br />
  16. 16. Web formation<br />A nonwoven fabric is basically a web of fibers held together in some way.<br />The web may be made of Staple Fibresor Filaments, or from portions of polymer film.<br />
  17. 17. Web formation through staple fibres<br />
  18. 18. Parallel-laid web from carded fibers<br /><ul><li>In a carded web the fibers are parallel to each other and to the direction in which the card produces the web, making it stronger when pulled lengthwise than crosswise.</li></li></ul><li>Cross Laid-web<br /><ul><li>To increase the strength of web in both lengthwise and crosswise directions, cross laid web is used.</li></li></ul><li>Web from staple fibresRandom web (3)<br />The Rando-Webber creates such a randomly orientated web by blowing the fibres about in a stream of air and then sucking them onto the surface of a perforated drum to form a layer.<br />
  19. 19. PhotosRandom Webs<br /><ul><li>To increase the strength of web in both lengthwise and crosswise directions, cross laid web is used.</li></li></ul><li>Other Web formation methods<br />Apart from carding methods (dry-laid), webs from short staple fibres are created by Wet laying.<br /><ul><li>Wet laying is used in paper-making. The pulped fibres are mixed with water and then scooped into uniform layers on wire screens or on rotating, perforated drums.
  20. 20. Short, acrylic fibres are made into a wet-laid web from a salt solution. As the water evaporates, the salt chemically bonds the fibres into a strong, synthetic, water proof paper.</li></li></ul><li>Webs from filament<br />
  21. 21. Webs from filament<br />It is possible to tangle filaments together to form a web. Such webs are much stronger than web made from staple fibres.<br />The thermoplastic filaments are welded to each other to form a strong fabric suitable for curtains & tablecloths. <br />Sometimes, the filaments are textured before web formation. This allows greater extensibility of the fabric in use.<br />
  22. 22. New web formation method<br />Spun-laced webs is a new method of entangling fibres to create lace-like nonwoven fabrics uses fine, precisely controlled, jets of water.<br />The resultant fabric does not need any further reinforcing by heat or adhesive.<br />It is pliable, resistant to damage during washing, drip-dry, light, warm and soft, excellent for curtains, table cloths and other lace-type application.<br />
  23. 23. Conclusion<br />This section we discussed what non-wovens are and their applications in textile.<br />We also discussed the web formation methods for both staple fibres and filament fibres.<br />

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