For spinning viscose rayon, the extrusion spinnerettes are made of ___________________?
Correct answer: B. Platinum or gold alloys
- A. High carbon steel
- B. Platinum or gold alloys
- C. Aluminium
- D. Nickel
Explanation
Platinum and gold alloys withstand the corrosive viscose dope and can be formed with the very fine, accurately spaced holes required in spinnerettes. Common steels and aluminium would corrode or wear more readily.
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