Packaging Structure
Flexible packaging is made of thin layers bonded together — like a sandwich. Each layer has a job. Tap any structure below to see how it works.
All
2-layer
3-layer
4-layer
PET / PE
2
-layer structure •
Snacks, bakery, dry goods
PET
Polyester film
PE
Polyethylene
Sealant
Clear, printable, basic moisture protection
Limitation: No oxygen or light barrier — shorter shelf life
BOPP / PE
2
-layer structure •
Chips, candy wrappers, labels
BOPP
Oriented polypropylene
PE
Polyethylene
Sealant
Glossy and stiff, good for retail display
Limitation: No oxygen or light barrier
METPET / PE
2
-layer structure •
Chocolates, biscuits, tea
METPET
Metallised polyester
PE
Polyethylene
Sealant
Shiny metallic look + decent moisture & light barrier
Limitation: Can't see through; moderate oxygen barrier
Kraft Paper / PE
2
-layer structure •
Coffee pouches, organic products
Kraft Paper
Natural brown paper
PE
Polyethylene
Sealant
Eco & natural look, paper texture
Limitation: Poor moisture resistance without extra barrier
PET / METPET / PE
3
-layer structure •
Namkeen, snacks, dry foods
PET
Polyester film
METPET
Metallised polyester
Barrier
PE
Polyethylene
Sealant
Good all-round barrier — moisture, oxygen, light
Limitation: Not as strong as aluminium foil
BOPP / METPET / PE
3
-layer structure •
Chips, popcorn, biscuits
BOPP
Oriented polypropylene
METPET
Metallised polyester
Barrier
PE
Polyethylene
Sealant
Glossy finish + metallic barrier combo
Limitation: Moderate barrier — not for long shelf life
Kraft / METPET / PE
3
-layer structure •
Specialty coffee, artisan food
Kraft Paper
Natural brown paper
METPET
Metallised polyester
Barrier
PE
Polyethylene
Sealant
Natural paper look with improved barrier
Limitation: Not suitable for very humid conditions
PET / Alu Foil / PE
3
-layer structure •
Pharma, retort pouches, sauces
PET
Polyester film
Alu Foil
Aluminium foil
Barrier
PE
Polyethylene
Sealant
Superior barrier — blocks moisture, oxygen, light & odours
Limitation: Opaque; higher cost; not microwave-safe
BOPP / Alu Foil / PE
3
-layer structure •
Spices, masalas, condiments
BOPP
Oriented polypropylene
Alu Foil
Aluminium foil
Barrier
PE
Polyethylene
Sealant
Strong foil barrier with stiff outer film
Limitation: Opaque; not recyclable as single stream
PET / BOPA / PE
3
-layer structure •
Liquid soups, wet foods, retort applications
PET
Polyester film
BOPA
Biaxial oriented nylon
Barrier
PE
Polyethylene
Sealant
Excellent puncture & flex resistance + oxygen barrier
Limitation: Higher cost; absorbs some moisture
BOPP / BOPA / PE
3
-layer structure •
Processed meats, cheese, dairy
BOPP
Oriented polypropylene
BOPA
Biaxial oriented nylon
Barrier
PE
Polyethylene
Sealant
Tough puncture-proof structure with clear finish
Limitation: Moderate cost; nylon absorbs moisture
Kraft / Alu Foil / PE
3
-layer structure •
Premium coffee, pet treats, health foods
Kraft Paper
Natural brown paper
Alu Foil
Aluminium foil
Barrier
PE
Polyethylene
Sealant
Premium eco look + maximum foil barrier
Limitation: Not transparent; higher material cost
PET / Alu Foil / BOPA / PE
4
-layer structure •
High-temperature retort pouches, ready-to-eat meals
PET
Polyester film
Alu Foil
Aluminium foil
Barrier 1
BOPA
Biaxial oriented nylon
Barrier 2
PE
Polyethylene
Sealant
Maximum protection — double barrier + puncture resistance
Limitation: Premium cost; heaviest structure
BOPP / Alu Foil / BOPA / PE
4
-layer structure •
Processed meat, frozen food, sterile packaging
BOPP
Oriented polypropylene
Alu Foil
Aluminium foil
Barrier 1
BOPA
Biaxial oriented nylon
Barrier 2
PE
Polyethylene
Sealant
Excellent stiffness + double barrier for tough environments
Limitation: High cost; not recyclable in standard streams
Kraft / Alu Foil / BOPA / PE
4
-layer structure •
Premium pet food, nutraceuticals, organic products
Kraft Paper
Natural brown paper
Alu Foil
Aluminium foil
Barrier 1
BOPA
Biaxial oriented nylon
Barrier 2
PE
Polyethylene
Sealant
Natural look with maximum barrier performance
Limitation: Complex structure; highest cost