sericulture loukya meda

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  1. 1. Sericulture & Silk Loukya Meda
  2. 2. Silk CULTIVATION AND MANUFACTURE OF SILK IS KNOWN AS SERICULTURE SILK ORIGINATED IN 2600 BC SILK IS A NATURAL PROTEIN FIBER OBTAINED FROM THE COCOONS OF SILKWORM IT IS A NATURAL FILAMENT FIBER BEST QUALITY OF SILK CHINA SILK PROTEIN IS CALLED FIBROIN SILK GUM IS CALLED SERICIN
  3. 3. Silk Worm IN INDIA SILK IS OBTAINED FROM DIFFERENT SPECIES OF SILKWORM MULBERRY SILK - BOMBYX MORI L MUGA SILK - ANTHERAEA ASSAMENSIS ERI SILK - SAMIA RICINI AND PHILOSAMIA RICINI TUSSAR SILK - ANTHERAEA MYLITTE DURY
  4. 4. ERI SILK MUGA SILKTUSSAR SILK MULBERRY SILK Silk Cloth
  5. 5. Silk Manufacture Cocoon Cultivation Softening the Seracin Reeling the Filament Sorting Cocoons Throwing Degumming of Thrown Silk Filature Operation
  6. 6. CULTIVATION LIFE CYCLE OF A SILK WORM
  7. 7. SORTING - Sorting Cocoons is the process in which cocoons are first sorted according to color, size shape and texture. Cocoon from China are white, Japanese cocoons are creamy white and yellow and Italian cocoons are yellow. Filature Operation The different operation are: Sorting Cocoons Softening the sericin Reeling the filament The Cocoons are delivered to the factory called Filature for different process to unwind the silk. CHINA JAPANESE ITALIAN
  8. 8. Softening the Sericin is the process in which cocoons are heated in boiling water to soften the gummy substance that holds the cocoon filament. Raw silk consist of about 80% fibroin and 20% Sericin. FILATURE OPERATION Softening and Reeling Reeling the Filament is the process of unwinding the filament from the cocoon Silk filaments are unwound in the reel and combined together to make thread of raw silk. The filaments from 4 to 8 cocoons are joined. The resulting is called raw silk, which is consists usually of 48 individual silk fiber. The sericin acts as adhesive in holding the several filaments. The length of the reeled filament is
  9. 9. `Twisting one or more threads of raw silk into a strand sufficiently strong for weaving or knitting Raw silk skeins are sorted according to size, color and length or quality It is then soaked in warm water with soap and oil After mechanical drying the skeins are wound on bobbins During this winding, single strands may be given any desired amount of twist If two or more yarns are to be doubled, they are twisted again in same direction Throwing Process
  10. 10. Degumming involves putting thrown silk yarn through final soap bath to remove the sericin. This process brings out the natural luster and soft feel of the silk. 25% of the weight is lost by this process. After degumming, the silk fiber is creamy white and less stiff Degumming Of Thrown Silk
  11. 11. WEAVING AND DYEING Weaving is an operation which creates a fabric by interlacing the wrap yarns (lengthwise) and the weft yarns. Weaving is carried out on looms. Dyeing is the process of adding color to silk fibers, yarns, and fabrics. Dyeing is normally done in a special solution containing dyes and particular chemical material. After dyeing, dye molecules have uncut chemical bond with fiber molecules. The temperature and time controlling are two key factors in