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MDSE 2650 Exam II (1). Questions & 100% Verified Correct Answers with complete solutions (Latest update
MDSE 2650 Exam II (1). Questions & 100% Verified Correct Answers with complete solutions (Latest update
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MDSE 2650 Exam IIProduced from raw materials or synthesized from chemicals - ANS-Manufactured Fibers
Manufactured from materials found in nature by modifying the polymer (e.g. cellulose) to a
derivative that can be spun and then changed back to its original chemistry - ANS-Regenerated
Fibers
Synthesized from non-fibrous materials - ANS-Synthetic Fibers
Made from natural/synthetic rubber - ANS-Rubber
Inorganic fibers manufactured from metal and glass - ANS-Mineral Fibers
Manufactured fibers that melt when heated - ANS-Thermoplastic Fibers
Thermoplastic fibers are good for applying _______ ________, like permanent pleats, because
of the ability to melt when heated - ANS-thermal finishes
The spinning process used to produce nylon, olefin, polyester, and other thermoplastics is ____
spinning. - ANS-melt
1. melt polymer chips/pellets
2. filter fluid
3. extrude fluid through spinneret
4. solidify fiber by cooling
5. stretch/draw the partially cooked fiber - ANS-Melt Spinning
The spinning process used to produce acetate, acrylic, modacrylic, spandex, and other
materials that can easily be dissolved in a solvent and then recovered by the removing the
solvent without changing the polymer properties is ___ spinning. - ANS-dry
1. dissolve fiber-forming substance in a solvent
2. filter fluid
3. extrude fluid through spinneret
4. solidify fiber by evaporating solvent using warm air
5. stretch/draw partially solidified fiber - ANS-Dry Spinning
The spinning process used to produce rayon, spandex, some acrylics, and other materials that
require a complex process because they can't easily be dissolved in a solvent is ___ spinning. -
ANS-wet
, 1. react raw material
2. filter soluble derivative
3. extrude soluble derivative
4. solidify fiber in chemical bath
5. stretch/draw partially solidified fiber - ANS-Wet Spinning
Fibers that are less than 1 denier in size (smaller than a single filament of silk) -
ANS-Microfibers
What can be changed by altering the shape of the spinneret holes? - ANS-Cross-Sections
Easiest to manufacture; most commonly used - ANS-Round Cross-Section
Similar to silk; used to enhance luster because it reflects light - ANS-Triangular Cross-Section
Used for carpet because lobes are effective at hiding dirt - ANS-Trilobal Cross-Section
For items that require high bulk but low weight; also for carpet to reduce soil appearance -
ANS-Hollow Cross-Section
Added to make manufactured fibers dull; Titanium Dioxide - ANS-Delusterant
What is the most manufactured synthetic fiber? - ANS-Polyester Fiber
By volume, _________ fibers are used more than _______ fibers. - ANS-synthetic, natural
What are the three regenerated fibers? - ANS-rayon, modal, and lyocell
What was the first manufactured fiber and what was it advertised as? - ANS-Rayon, as artificial
silk
This fiber shrinks progressively and is known as "cheaper rayon" - ANS-Viscose
This fiber does not shrink and has good dimensional stability. It is also a variation of rayon. -
ANS-High Wet Modulus Rayon
This fiber is used for technical textiles and is a variation of rayon. - ANS-High Tenacity Rayon
This fiber will shrink and is a variation of rayon. - ANS-Cupro
This fiber is made from bamboo, which is seen as an environmentally friendly source and is a
variation of rayon. - ANS-Bamboo Rayon
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