Question:
Which of the following statements are correct with regard to orientation of plastic packaging films?
A. Uniaxial or biaxial molecular orientation of polymers involves stretching an un-oriented thermoplastic below its melting point but above glass transition temperature.
B. Oriented films are widely used in stretch packaging.
C. Oriented films have better optical properties but inferior gas barrier properties compared to their unoriented films.
D. Biaxially oriented polypropylene (BOPP) is used as a sealant layer in retort pouch.
Choose the most appropriate answer from the options given below:
Which of the following statements are correct with regard to orientation of plastic packaging films?
A. Uniaxial or biaxial molecular orientation of polymers involves stretching an un-oriented thermoplastic below its melting point but above glass transition temperature.
B. Oriented films are widely used in stretch packaging.
C. Oriented films have better optical properties but inferior gas barrier properties compared to their unoriented films.
D. Biaxially oriented polypropylene (BOPP) is used as a sealant layer in retort pouch.
Choose the most appropriate answer from the options given below:
A. Uniaxial or biaxial molecular orientation of polymers involves stretching an un-oriented thermoplastic below its melting point but above glass transition temperature.
B. Oriented films are widely used in stretch packaging.
C. Oriented films have better optical properties but inferior gas barrier properties compared to their unoriented films.
D. Biaxially oriented polypropylene (BOPP) is used as a sealant layer in retort pouch.
Choose the most appropriate answer from the options given below:
Show Hint
Oriented films: stretched above Tg, used in stretch packaging, better optics, inferior gas barrier.
BOPP: not a sealant layer in retort pouch.
BOPP: not a sealant layer in retort pouch.
Updated On: Aug 18, 2026
- (B), (C) and (D) only
- (B) only
- (A) only
- (A), (B) and (C) only
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Orientation of plastic films affects their properties.
Oriented films are used for specific applications.
Step 2: Key Formula or Approach:
No specific formula.
Need to know the properties of oriented films.
Step 3: Detailed Explanation:
A. Orientation involves stretching above Tg but below melting point - correct.
B. Oriented films are used in stretch packaging - correct.
C. Oriented films have better optical properties but inferior gas barrier - correct.
D. BOPP is used as a sealant layer in retort pouch - incorrect (used as outer layer).
Thus, A, B, and C are correct.
Step 4: Final Answer:
The correct statements are (A), (B), and (C).
Hence, the correct option is (D).
Orientation of plastic films affects their properties.
Oriented films are used for specific applications.
Step 2: Key Formula or Approach:
No specific formula.
Need to know the properties of oriented films.
Step 3: Detailed Explanation:
A. Orientation involves stretching above Tg but below melting point - correct.
B. Oriented films are used in stretch packaging - correct.
C. Oriented films have better optical properties but inferior gas barrier - correct.
D. BOPP is used as a sealant layer in retort pouch - incorrect (used as outer layer).
Thus, A, B, and C are correct.
Step 4: Final Answer:
The correct statements are (A), (B), and (C).
Hence, the correct option is (D).
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