Yarn Processing 1
Filament yarns are made of ____ fibers while spun yarns are made of ____ fibers.
filament fibers; staple fibers
Are petroleum-based synthetic fibers hydrophilic/hydrophobic and oleophilic/oleophobic?
Hydrophobic and oleophilic.
Opening is the first step of the spinning process, what are purposes of this step?
Loosens, cleans, blends fibers, removes dirt and trash, and helps determine yarn quality.
Two different fibers present in one yarn is a ____ blend.
Intimate blend
When high strength is needed, ____ yarn is used.
Filament yarn.
_____ yarn is formed by twisting together two or more single yarns.
Ply yarn
Do synthetic fibers have good or poor static cling characteristics?
Poor static and lint cling
Which step in the spinning process is optional and helps increase parallelism of fibers?
Combing
Which synthetic fiber is not resistant to sunlight compared to other synthetic fibers?
Nylon
What are the three yarn structures?
Singly, Ply, Cord
The strength of ____ yarns is not related to fiber strength.
Spun yarns
Which synthetic fiber is a color scavenger?
Nylon
Carding is the process of partially straightening fibers that results in ____?
Carded sliver
What are three benefits of blending fibers?
Decrease costs, improve processing and uniformity, better hand, texture, and appearance.
____ yarn has no protruding ends thus less likely to pill, collect lint or shed soil.
Filament yarn
This type of yarn is less smooth, more permeable to air and liquids, more contact points, and is less static prone.
Bulk continuous fiber (BCF) yarns.
Which synthetic fiber provides warmth without weight?
Acrylic
What are the three yarn spinning methods?
Ring spinning, rotor spinning, air jet spinning
For the indirect yarn numbering system, we calculate ___.
Cotton count (cc)
Due to less area of yarn in contact with skin, ____ yarn is more comfortable and less clammy.
Spun yarns.
Which type of yarn is more likely to pill, attract lint, and has protruding ends?
Spun yarns
How are the shape and size of synthetic fibers controlled?
Change the shape and size of holes in the spinneret.
____ spinning method produces yarns with the highest strength but lowest production rate.
Ring spinning
A piece of fabric has 100% polyester yarns in the warp direction and 100% cotton yarns in the filling direction. What is this called?
Mixture blend
____ yarn are smoother, stronger, more uniform, and has fewer fibers present
Combed yarns.