Question:
In case of aluminum laminated cartons, the aluminum foil
In case of aluminum laminated cartons, the aluminum foil
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Aseptic Carton Packaging Functions:
ALUMINUM FOIL = GAS AND LIGHT BARRIER (Blocks $\text{O}_2$ and UV/visible light).
Paperboard = Mechanical strength/rigidity.
Inner Polyethylene = Liquid-tight heat sealing.
ALUMINUM FOIL = GAS AND LIGHT BARRIER (Blocks $\text{O}_2$ and UV/visible light).
Paperboard = Mechanical strength/rigidity.
Inner Polyethylene = Liquid-tight heat sealing.
Updated On: Sep 15, 2026
- Acts as gas and light barrier
- Provides liquid barrier
- Provides mechanical strength
- Enables the sealing process
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Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Multilayer aseptic packaging laminate architecture (Tetra Brik Aseptic): the ultrathin aluminum foil core layer (6--6.3 $\mu$m) provides a 100% impermeable barrier against atmospheric oxygen, light, off-odors, and photo-oxidation for long-life sterile UHT dairy packaging.
Key Formula or Approach:
\[ \text{Tetra Pak Aseptic Layers: Polyethylene (Seal/Liquid)} \mid \text{Paperboard (Strength/Form)} \mid \mathbf{Al \text{ } Foil (\text{O}_2 \text{ \& Light Barrier})} \]
Step 2: Detailed Explanation:
In dairy aseptic packaging and laminate engineering (Tetra Brik Combibloc cartons for UHT milk):
- Standard 6-layer aseptic packaging laminate consists of:
1. External Polyethylene (1 layer): Protects against outside moisture and abrasion.
2. Paperboard (Duplex board, $\approx 75\%$ of package weight): Provides mechanical rigidity, stiffness, and structural form.
3. Laminating Polyethylene: Bonds paperboard to aluminum.
4. Aluminum Foil ($6 - 6.3\;\mu\text{m}$) (A): Serves as the vital Gas and Light Barrier, providing a $100\%$ impermeable barrier against oxygen transmission, light radiation, and volatile external aromas, preventing lipid auto-oxidation and riboflavin degradation.
5. Inner Polyethylene Layers (Surlyn/mLLDPE): Provide liquid barrier and heat-seal integrity.
Step 3: Final Answer:
Hence, the aluminum foil acts as gas and light barrier, matching option (A).
Multilayer aseptic packaging laminate architecture (Tetra Brik Aseptic): the ultrathin aluminum foil core layer (6--6.3 $\mu$m) provides a 100% impermeable barrier against atmospheric oxygen, light, off-odors, and photo-oxidation for long-life sterile UHT dairy packaging.
Key Formula or Approach:
\[ \text{Tetra Pak Aseptic Layers: Polyethylene (Seal/Liquid)} \mid \text{Paperboard (Strength/Form)} \mid \mathbf{Al \text{ } Foil (\text{O}_2 \text{ \& Light Barrier})} \]
Step 2: Detailed Explanation:
In dairy aseptic packaging and laminate engineering (Tetra Brik Combibloc cartons for UHT milk):
- Standard 6-layer aseptic packaging laminate consists of:
1. External Polyethylene (1 layer): Protects against outside moisture and abrasion.
2. Paperboard (Duplex board, $\approx 75\%$ of package weight): Provides mechanical rigidity, stiffness, and structural form.
3. Laminating Polyethylene: Bonds paperboard to aluminum.
4. Aluminum Foil ($6 - 6.3\;\mu\text{m}$) (A): Serves as the vital Gas and Light Barrier, providing a $100\%$ impermeable barrier against oxygen transmission, light radiation, and volatile external aromas, preventing lipid auto-oxidation and riboflavin degradation.
5. Inner Polyethylene Layers (Surlyn/mLLDPE): Provide liquid barrier and heat-seal integrity.
Step 3: Final Answer:
Hence, the aluminum foil acts as gas and light barrier, matching option (A).
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