Question

Which process is used to manufacture polythene bags?

• A. Injection Moulding
• B. Blown-film Extrusion
• C. Vacuum Forming
• D. Compression Moulding

Hint:

Blown-film extrusion is commonly used for manufacturing thin plastic films, such as polythene bags.

Answer 1

The Correct Option is B

Step 1: Understanding the Manufacturing Process.
Polythene bags are typically made using the blown-film extrusion process. This method involves melting the plastic and blowing it into thin films, which are then cooled and formed into bags.
Step 2: Conclusion.
Thus, the correct process for manufacturing polythene bags is Blown-film Extrusion.
\[ \boxed{\text{The correct answer is (b) Blown-film Extrusion.}} \]