Discussion
Spandex and Lycra are examples of .................... fiber.
Answer: B
Spandex and Lycra are urethane (polyurethane) fibres.
Spandex, called elastane outside North America, is a synthetic fibre made of at least 85 per cent segmented polyurethane, which gives it exceptional elasticity: it can stretch to several times its length and recover. Lycra is DuPont's (now Invista's) trade name for spandex.
Acrylic fibres are based on acrylonitrile, olefin fibres on polypropylene or polyethylene, and polyester fibres on polyethylene terephthalate. In fibre examination, these classes are distinguished by microscopy, solubility, melting behaviour and infrared spectroscopy.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development