Nonwoven question paper (FE 407) from BUTEX affiliated colleges' 2023 Level-4 Term-II finals. Includes dry laid and wet laid web formation, spun bonding, melt blowing, thermal bonding with bi-component fibres, and chemical bonding by foam and spray methods.
Level-4 Term-II, Final Exám-2023
Subject: Nonwoven (Code: FE 407)
Time: 3.0 Hrs. Full Marks: 72
(Use separate answer script for Part: A and Part: B)
(All parts of a question must be answered consecutively)
Part: A
(Answer any three questions)
1. (a) Define non woven fabrics. State the properties of non woven fabrics.
(b) State the flow chart of non woven fabric production.
(c) Illustrate the dry laid and wet laid web formation technique with suitable sketch.
[4+2+6=12]
2. (a) Define spun bonding. Mention the raw materials used in spun bonded fabric production.
(b) Describe the spun bonding process with figure.