GATE (TF) Textile 2011 Question Paper Solution | GATE/2011/TF/14

Question 14 (Textile Engineering & Fibre Science)

The machine used for continuous processing of fabric is

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Frequently Asked Questions | FAQs

What is meant by continuous scouring process?

J-box scouring is a type of continuous scouring process used in textile manufacturing to remove impurities from yarns. In this process, yarn is passed through a J-shaped box that contains a scouring solution, typically a mixture of caustic soda and a wetting agent, which removes impurities such as oils, waxes, and dirt from the yarn.

The J-box scouring process typically involves the following steps:
Pre-treatment: The yarn is inspected and any loose dirt or debris is removed by shaking, brushing, or vacuuming.
J-box preparation: A scouring solution is prepared by dissolving a detergent, such as sodium hydroxide or sodium carbonate, in hot water. The pH of the solution is typically around 10-12.
J-box scouring: The yarn is passed through the J-box, which contains the scouring solution. The yarn is typically subjected to a combination of high temperature and pressure to ensure even distribution of the solution and to ensure that all impurities are removed.
Rinsing: The yarn is then rinsed thoroughly in hot water to remove any residual scouring solution.
Neutralization: A weak acid solution, such as acetic acid or sulfuric acid, is applied to the yarn to neutralize the residual alkalinity.
Final rinsing: The yarn is rinsed several times in hot water to remove any residual acids and to ensure that all impurities have been removed.
After the scouring process, the yarn is ready for subsequent processing steps, such as dyeing or finishing. The J-box scouring process is commonly used for processing large volumes of yarn in a continuous flow, and is known for its efficiency and effectiveness in removing impurities from yarns.

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