Spinning Flashcards
What is the first step in traditional spinning processes for natural fibers?
A: Opening and cleaning fiber bales.
What is carding?
A: Carding is the process of combing fibers to form a wide fiber web called a sliver, aligning the fibers parallel to each other.
What is a sliver in the context of spinning?
A: A sliver is a wide fiber web with parallel fibers formed during the carding process.
What are the two methods of handling slivers in traditional spinning?
A: The sliver can either be divided into narrower ribbon bands or folded on itself several times (doubling).
What are slubbings?
A: Slubbings are narrower strips of fibers formed by drawing out and stretching the sliver.
How is yarn formed in traditional spinning processes?
A: The slubbings are gradually drawn out, stretched, and twisted into a yarn.
What are the three main types of industrial spinning for synthetic fibers?
A: Wet spinning, dry spinning, and melt spinning.
What is wet spinning used for, and how does it work?
A: Wet spinning is used for producing viscose and acrylic fibers by extruding a polymer solution through a spinneret into a coagulating bath.
Describe dry spinning and its application. .
A: Dry spinning is used for producing acrylic and acetate fibers by extruding a polymer solution through a spinneret into a heated chamber where the solvent evaporates
What is melt spinning, and what fibers are produced by this method?
A: Melt spinning is used for producing nylon and polyester fibers by melting the polymer and extruding it through a spinneret, where it solidifies upon cooling.
How does the drawing process affect synthetic fibers?
A: The drawing process strengthens the fiber by stretching it.
What determines the final filament fiber characteristics?
A: The size and shape of the spinneret hole and the spinning and drawing conditions.
Q: What is the difference between monofilament and multifilament yarn?
A: Monofilament yarn is made from a single filament, while multifilament yarn is produced by twisting two or more filaments together.
Which natural fiber is a multifilament yarn?
A: Silk is the only natural multifilament yarn.
Q: Why is the drawing process important in both traditional and industrial spinning? ,
A: The drawing process is important because it stretches and aligns the fibers, increasing their strength by improving the orientation and uniformity of the fibers, resulting in stronger yarn.
