Origin of retortable bags
The retort pouch was invented by the United States Army Natick R&D Command, Reynolds Metals Company, and Continental Flexible Packaging, who jointly received the Food Technology Industrial Achievement Award for its invention in 1978. Retortable pouches are extensively used by the U.S. military for field rations (called Meals, Ready-to-Eat, or MREs).
Retort Pouch material and its function
3-ply laminated material
• Polyester/Aluminum foil/polypropylene
Outer polyester film: • 12microns thick
• Protects Al foil
• Provide strength and abrasion resistance
Core aluminum foil:
• Thick (7,9.15microns)
• Water, light, gas and odor barrier properties
Inner polypropylene:
• Thickness – type of product
– Soft/liquid products – 50microns
– Hard/fish products – 70 microns
• Provide heat salability (melting point 140℃) and product resistance
• Protects Al foil
• Overall pack strength/impact resistance
4 ply laminate
- 12microns PET+7micronsAl foil +12micronsPA/nylon +75-100micronsPP
- high strength and impact resistance (prevents puncturing of laminate by fish bones)
Retort Laminate layers with name
2 PLY Nylon or polyester – polypropylene
3 PLY Nylon or polyester – aluminum foil -polypropylene
4 PLY polyester -Nylon – Aluminum foil- Polypropylene
Effective benefits of retort film materials
- Low oxygen permeability
- High Sterilization temp. stability
- Low water vapor transmission rate
- Thickness tolerance +/- 10%
Advantages of retort packaging system
- Saving energy to manufacture pouches than cans or jars.
Retort pouches are thin use less material.
- Light weight retort packaging.
- Saving production cost of packaging.
- Suitable for automatically packaging system.
- Packed retort pouches is small and compact, saving storage space and lower the transportation cost.
- Notches on either side at the top indicate where to tear open the pouch, which was fairly easy to do.
- Food safety and FBA free.
Usages of Pouches for retort foods
- Curry, Pasta sauce,Stew,Seasonings for Chinese food,Soup,Rice congee,Kimchi,Meat,Sea food,Wet pet food
Post time: Oct-31-2022
