GATE (TF) Textile 2015 Question Paper Solution | GATE/2015/TF/27

Question 27 (Textile Engineering & Fibre Science)

The technology/ies used for producing SMS fabric is/are

(B)Spunlace and Meltblown
(D)Spunbond and Meltblown
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What technology is used for producing SMS fabric?

SMS fabric, which stands for Spunbond-Meltblown-Spunbond fabric, is a nonwoven fabric made of three layers. The production of SMS fabric involves the use of different technologies for each layer:
Spunbond layer: The first layer of SMS fabric is made using the spunbond technology, which involves the extrusion of fine filaments of thermoplastic polymer through a spinneret. These filaments are then laid down on a moving conveyor belt, where they are bonded together using heat and pressure to create a web of continuous fibers.
Meltblown layer: The second layer of SMS fabric is made using the meltblown technology, which involves the extrusion of molten thermoplastic polymer through a die. The extruded polymer forms a web of very fine fibers, which are then cooled and bonded together using heat and pressure.
Spunbond layer: The third layer of SMS fabric is made using the same spunbond technology as the first layer, resulting in another layer of continuous fibers.
The combination of these three layers creates a fabric with excellent barrier properties, good strength and durability, and high breathability. SMS fabric is commonly used in medical and hygiene products, such as surgical gowns, face masks, and disposable diapers, due to its high level of protection and comfort.

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