Question

Frequently used packaging materials in dairy industry are -
A. Polythene(PE)
B. LDPE
C. HDPE
D. Polypropylene(PP)
Choose the correct answer from the options given below:

• A. A, B and D only
• B. A, B and C only
• C. A, B, C and D
• D. B, C and D only

Hint:

Associate the polymer with the package type: {LDPE} \(\rightarrow\) Flexible pouches (milk bags) {HDPE} \(\rightarrow\) Rigid jugs/bottles {PP} \(\rightarrow\) Cups/tubs (yogurt, butter) Since all these package types are common, all the materials are used.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
The question asks to identify the common types of plastic polymers used for packaging in the dairy industry. Different dairy products have different packaging requirements (e.g., rigid vs. flexible, heat resistance).
Step 2: Detailed Explanation:
Let's analyze the use of each material:
A. Polythene (PE): This is the general chemical name for a family of polymers that includes LDPE and HDPE. Since both are widely used, the general term is also correct.
B. LDPE (Low-Density Polyethylene): This polymer is known for its flexibility and excellent heat-sealing properties. It is the primary material used for making flexible milk pouches (milk bags).
C. HDPE (High-Density Polyethylene): This polymer is more rigid and robust than LDPE. It is used extensively for blow-molding rigid containers like milk jugs and bottles.
D. Polypropylene (PP): This polymer is known for its good barrier properties and higher melting point compared to polyethylene. It is widely used for manufacturing tubs for butter and margarine, and cups for yogurt and dahi, as it can withstand hot-filling processes.
All four listed materials are very common and frequently used in various applications within the dairy packaging industry.
Step 3: Final Answer:
Since Polythene (PE), LDPE, HDPE, and Polypropylene (PP) are all frequently used, the correct option includes all of them.