Correct option is C
The methods of
chemical spinning refer to processes used to produce fibers from polymers using chemical solutions. These methods typically include:
·
Melt spinning (B): In melt spinning, the polymer is heated until it melts, and the molten polymer is extruded through a spinneret to form fibers. This method is commonly used for thermoplastic polymers like
nylon and
polyester.
·
Dry spinning (C): In dry spinning, the polymer solution is dissolved in a solvent, and the solution is extruded through a spinneret into warm air, where the solvent evaporates, leaving behind the polymer fibers. This method is used for polymers like
acetate and
modacrylic.
·
Wet spinning (D): In wet spinning, the polymer solution is extruded into a bath of chemicals that coagulate the polymer, forming fibers. This method is commonly used for polymers like
rayon and
spandex.
Information Booster:
Melt spinning (B) involves the extrusion of a polymer that has been heated to a molten state, then spun into fibers by cooling. This process is used for polymers that can be melted without decomposing, such as
nylon or
polyester.
Dry spinning (C) is used when the polymer is dissolved in a solvent and extruded into hot air, which evaporates the solvent, leaving behind the solid polymer fiber. This technique is typically used for
acetate,
modacrylic, and
polyurethane.
Wet spinning (D) is employed when the polymer is dissolved in a solvent, and the solution is extruded into a chemical bath, where the polymer is coagulated. It is commonly used for fibers like
rayon,
spandex, and
acrylic.
Additional Knowledge on Incorrect Options:
·
Ring Spinning (A):
Ring spinning is a method used in
spinning yarn from fiber (not chemical spinning). It involves the twisting of natural or synthetic fibers into yarn, but it is not a chemical spinning method. This spinning method applies primarily to the mechanical processing of fibers, not chemical-based methods.
·
Rotor Spinning (E):
Rotor spinning is another mechanical spinning technique used to produce yarn by directly twisting the fiber without using a chemical process. It is not used in chemical spinning processes.