GATE (TF) Textile 2014 Question Paper Solution | GATE/2014/TF/17

Question 17 (Textile Engineering & Fibre Science)

In a sizing process, if add-on is 12.8% and paste concentration is 16%, the value of wet pick-up (%) would be

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Add on=12.8%

Paste concentration=16%

Wet pick-up(%)=?


Wet pick-up%=(Add on%/Paste concentration%)*100

Wet pick-up%=(12.8/16)*100

Wet pick-up%=0.8*100

Wet pick-up%=80 (Answer)

Frequently Asked Questions | FAQs

What is the purpose of sizing?

Sizing, also known as sizing or slashing, is a process used in textile manufacturing to apply a protective coating or sizing agent onto the warp yarns before weaving. The purpose of sizing is to enhance the performance of the warp yarns during weaving and subsequent processing stages. Some of the main purposes of sizing include:
Improved Weavability: Sizing helps to improve the weavability of the warp yarns by reducing their friction, abrasion, and hairiness. This makes the yarns smoother and more manageable during the weaving process, reducing yarn breakage, and improving the overall efficiency of the weaving process.
Warp Yarn Protection: Sizing provides a protective coating on the warp yarns, which helps to prevent yarn damage during weaving, such as abrasion, fraying, and tangling. This protection also extends to subsequent processing stages, such as beaming, drawing-in, and warping, reducing yarn breakage and increasing the quality and yield of the woven fabric.
Size Lubrication: The sizing agent acts as a lubricant between the warp yarns, reducing friction and wear during weaving. This helps to prevent yarn-on-yarn friction, which can lead to yarn breakage, and enables the yarns to slide more easily through the shed of the loom, improving the overall weaving efficiency.
Sizing for Fabric Aesthetics: Sizing can also be used to achieve desired fabric aesthetics, such as improved fabric appearance, drape, and feel. Sizing agents can be formulated to enhance the characteristics of the final woven fabric, such as its hand (feel), weight, and texture.
Sizing for Fabric Performance: Sizing agents can be formulated to enhance the performance properties of the final woven fabric, such as its strength, abrasion resistance, dimensional stability, and other functional properties. This makes the sized fabric suitable for specific end-use applications, such as apparel, home textiles, technical textiles, and industrial textiles.
Efficient Weaving Process: Sizing can also contribute to the efficient operation of the weaving process by reducing warp yarn waste, facilitating warp yarn handling, and improving the overall loom efficiency and productivity.
Overall, the purpose of sizing is to improve the performance and efficiency of the weaving process, protect the warp yarns from damage, enhance the aesthetics and performance properties of the woven fabric, and achieve desired end-use requirements for various textile applications.

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