GATE (TF) Textile 2020 Question Paper Solution | GATE/2020/TF/08

Question 08 (Textile Engineering & Fibre Science)
Q.8The technology that does NOT produce a nonwoven fabrics is
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Frequently Asked Questions | FAQs

What is non woven fabric ?

Non-woven fabric is a type of fabric that is made from fibers or filaments that are bonded together through mechanical, thermal, or chemical processes, rather than being woven together like traditional fabrics. The fibers can be made from various materials, such as polyester, polypropylene, nylon, or rayon, and can be either short or long in length.
Non-woven fabrics are commonly used in a variety of applications, including disposable medical products, industrial filters, insulation, and geotextiles. They are also used in clothing, such as in the interlining of jackets, and in household items, such as cleaning wipes and furniture upholstery.
Because non-woven fabrics can be manufactured to have specific properties, such as water resistance, air permeability, or strength, they can be customized to suit a wide range of applications. They are also often more cost-effective than woven fabrics, since they require less labor to manufacture.

What is spunbonding ?

Spunbonding is a process used in the manufacture of non-woven fabrics. It involves the extrusion of filaments of a thermoplastic polymer, such as polypropylene, through a spinneret and the subsequent bonding of these filaments into a web of fabric.
During the process, the polymer is melted and extruded through a spinneret, which is a metal plate with many small holes. The filaments are then drawn out and cooled, which causes them to solidify. The filaments are laid down in a web formation, which is then passed through a series of rollers or other equipment that bond the filaments together. This bonding can be achieved through heat, pressure, or a combination of both.
Spunbond non-woven fabrics are lightweight, durable, and have good breathability and moisture resistance. They are commonly used in a range of applications, including medical masks and gowns, agricultural covers, and furniture upholstery. The process of spunbonding can be modified to produce fabrics with specific properties, such as increased strength or reduced weight.

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