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1. What is the distinction between dye and pig- ment colorants?

2. Cite four factors that determine what fabri- cation technique is used to form polymeric materials.

3. Contrast compression, injection, and trans- fer molding techniques that are used to form plastic materials.

4. Why must fiber materials that are melt spun and then drawn be thermoplastic? Cite two reasons.

5. Which of the following polyethylene thin films would have the better mechanical characteristics: (1) formed by blowing, or (2) formed by extrusion and then rolled? Why?

Mechanical Engineering, Engineering

  • Category:- Mechanical Engineering
  • Reference No.:- M91619198

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