GATE (TF) Textile 2015 Question Paper Solution | GATE/2015/TF/25

Question 25 (Textile Engineering & Fibre Science)

In cotton yarn sizing, the starch primarily acts as

(A)Binding agent
(B)Lubricating agent
(C)Antistatic agent
(D)Antimicrobial agent
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What are the sizing chemicals for cotton yarns?

Sizing chemicals are used to add strength and stiffness to cotton yarns during the weaving process. The specific sizing chemicals used can vary depending on the desired properties of the finished fabric and the type of machinery being used.
Some common sizing chemicals for cotton yarns include:
Starch: Starch is a natural sizing agent that is commonly used in the textile industry. It adds stiffness to the yarns, which helps prevent breakage during weaving.
Polyvinyl Alcohol (PVA): PVA is a synthetic sizing agent that is commonly used in the production of high-quality cotton fabrics. It provides excellent strength and stiffness, as well as good washability.
Polyacrylic acid: Polyacrylic acid is a water-soluble synthetic sizing agent that is commonly used in the textile industry. It provides excellent stiffness and abrasion resistance to cotton yarns.
Polyethylene glycol (PEG): PEG is a water-soluble polymer that is commonly used as a sizing agent for cotton yarns. It provides good strength and stiffness, as well as good washability.
Carboxymethyl cellulose (CMC): CMC is a natural sizing agent that is commonly used in the textile industry. It provides good strength and stiffness, as well as good washability.
Gelatin: Gelatin is a natural sizing agent that is commonly used in the textile industry. It provides good stiffness and abrasion resistance to cotton yarns.
The specific sizing chemicals used can vary depending on the desired properties of the finished fabric, the type of machinery being used, and the preferences of the textile manufacturer.

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