Question

Match the Product with the most appropriate Processing Technique employed.

• A. P-3; Q-1; R-2; S-4
• B. P-3; Q-4; R-1; S-2
• C. P-1; Q-2; R-4; S-3
• D. P-1; Q-3; R-4; S-2

Hint:

Remember processing: - Blow molding → hollow bottles, - Thermoforming → cups/containers, - Rotational molding → boots, tanks, toys, - Calendering → thin films/sheets.

Answer 1

The Correct Option is B

Step 1: Rainboots (P).
- Rainboots are hollow, large, and need uniform thickness.
- They are generally made by rotational molding, where powdered polymer is heated inside a rotating mold to form hollow objects.
\(\Rightarrow P-3\).

Step 2: Disposable plastic cups (Q).
- Plastic cups are thin-walled and shaped by heating thermoplastic sheets and pressing them into molds.
- This process is known as thermoforming.
\(\Rightarrow Q-4\).

Step 3: Soft drink bottles (R).
- Bottles are hollow objects manufactured by inflating hot polymer into a mold cavity.
- This is blow molding.
\(\Rightarrow R-1\).

Step 4: Flexible films (S).
- Polymer films are manufactured by squeezing molten polymer between heated rollers to form sheets.
- This is calendering.
\(\Rightarrow S-2\).



Step 5: Combine all matches.
\[ P-3,\; Q-4,\; R-1,\; S-2 \] Final Answer: \[ \boxed{\text{(B) P-3; Q-4; R-1; S-2}} \]