Listing ID #3838855
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Contact SupplierMercerising can be done at different stages during the pre-treatment process. This could be after Desizing or after Scouring or after Bleaching. When done after desize-washing, it induces maximum lustre onto the fabric. However, contamination of lye can occur, which reduces life of the caustic lye. High degree of whiteness can be achieved if the bleaching process is done after mercerisation. Mercerisation after scouring and bleaching prevents contamination of caustic lye but effects the whiteness and absorbency. Mercerising can be done either on wet fabric with a lye concentration controller or on dry fabrics. Mercerising could be done with either cold lye or with hot caustic.
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FABRIC FEEDING | ||||||||||
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Fabric feeding through Guiding and Centering devices. Positively Driven Batching-off unit with / without J scray for low tension and continuous working. Combination of three individually easily adjustable Curved Bar Rubber Expanders to feed Fabric in stretched condition. | ||||||||||
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LYE IMPREGNATOR | ||||||||||
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Made from Stainless Steel unless otherwise specified. Caustic lye impregnation with rollers dipped in lye as well as by caustic filled nips formed between top and bottom rollers. Grooved Bottom Rollers for better width stability. Dwell time control by speed adjustments. Driven rollers at regular intervals can be supplied for tension control. Can be equipped with chiller / heater for lye temperature control. Equipped with automatic / manual continuous filtering arrangement. Automatic fresh lye addition to maintain uniform caustic lye consistency to pre-adjusted concentration. | ||||||||||
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IMPREGNATOR WITH DWELL ZONE | ||||||||||
Mercerisers Model M-10 and above have the Impregnating zone subdivided into a Impregnating zone and a Dwell Zone. It is possible to use caustic lye in all sections or use caustic lye in the first Impregnator and use the second as a dwelling zone. For specific fabric tension requirements, drive to the intermediate bottom rollers can be provided to reduce tension in the fabric under process, ensuring better control on width. | ||||||||||
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TENSION CONTROLLED DRIVE | ||||||||||
Facility to over-feed fabrics to ensure better width stability. Programmable / pre-set speed between various individual drives. Multi-point Variable Frequency Drive with encoders to maintain uniform tension. Constant fabric tension. |
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STABILISER | ||||||||||
Excellent cascading throughout the passage in Stabiliser. Intensive Neutralisation with the help of fast liquor circulation in each cascade. Grooved Bottom Rollers for better width stability. Precise temperature control near boiling point guarantees best caustic removal from fabric. Excellent dimensional stability after stabiliser. Constant and uniform concentration of overflowing wash liquor. | ||||||||||
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SQUEEZING AFTER IMPREGNATOR / STABILISER | ||||||||||
Nip formed with Wear resistant Stainless Steel / Ebonite roller and special Rubber Roller for excellent caustic removal and longer life. Adjustable nip pressure upto 30-50 kg-cm. Automatic opening of nip when machine stops. Drive through direct-coupled Motor-Gearbox with Variable Frequency Drives. | ||||||||||
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WASHING | ||||||||||
Various options and combination of wash boxes are available depending on fabric quality like STN 18 for Normal woven fabrics / STN-25 CP for heavy fabrics / Drum washer for delicate fabrics. Precision control can be achieved with load cell and encoder for closed loop tension control to prevent linear and width shrinkage. Minimum water consumption through excellent counter-current water flow between washing sections. Intensified Washing action with elevated temperatures and counter flow of wash liquor. Powerful interchange between wash liquor and fabric with fast liquor exchange in the fiber. Highly efficient removal of residual caustic. Highest washing efficiency at all speeds. | ||||||||||
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SQUEEZING AFTER WASHING | ||||||||||
Each Washer is equipped with: Intermediate Squeeze Nip for bath separation. Low tension crease-free fabric movement. Fabric Expander before ni p. Stepless pressure regulation. Final nip is heavy duty, high pressure and of special design for excellent and uniform extraction throughout the width. Drive through direct-coupled Motor-Gearbox with Variable Frequency Drives. |
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LIQUOR CIRCULATION | ||||||||||
A suitable pump with a filtering arrangement is provided in the Impregnator, which delivers the filtered caustic lye back into the Impregnator through a distribution system located between each Roller. On request, the machine can be equipped with a continuous auto cleaning filter. The stabiliser is compartmentalised and each compartment is provided with a Stainless Steel Pump which collects the hot wash liquor from the first washing compartment and pumps it to the last section of the stabiliser. This liquor is spread onto the fabric. Similarly from this last section, the liquor is collected, filtered and pumped to the preceding section. This continues till the first stabilising section, where the accumulated liquor is taken for recovery / disposal. The flow of liquor in the direction opposite to the movement of the fabric ensures excellent removal of caustic. Â Â
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