The deterioration of fresh aquatic and marine fishes is mainly due to the decomposition of trimethylamine oxide by bacteria, which releases spoiled trimethylamine, oxidative rancidity of fish fat, softening of fish by enzymatic degradation in vivo, and toxic toxins produced by bacteria on the surface of fish (Aerobic Escherichia coli, Clostridium anaerobicus), which endanger human health.

modified atmosphere packaging machine for fresh sefood

The gases used for modified atmosphere packaging of fish are composed of CO2, O2 and N2, in which the concentration of CO2 is higher than 50%, inhibiting the growth of aerobic bacteria and fungi will not make the fish exudate, and inhibiting the reproduction of anaerobic bacteria by 10%-15% of the concentration of O2.

Because the gills and viscera of fish contain a lot of bacteria, they need to be cleaned and disinfected before packing.

Because CO2 is easy to leak out plastic film, the packaging material of modified atmosphere packaging for fish needs composite plastic film with high gas barrier, which can be kept for 15-30 days at 0-4 ~C.

British tuna is packaged with modified atmosphere packaging in mixed air of 35% – 45% CO2 and 55% – 65% N2, shelf life is 6 days.

The deterioration of shrimp is mainly caused by microorganisms. Its intrinsic enzymatic action causes shrimp to blacken. Modified atmosphere packaging can keep prawns fresh. Shrimp should be treated with 100 mg/L lysozyme and 1.25% sodium bisulfite, then packed in modified atmosphere packaging with mixed air of 40% CO2 and 60% N2, the shelf life is 22 days longer than that of the compared samples without modified atmosphere packaging.

Shandong Kangbeite Food Packaging Machinery Co., Ltd. is a professional manufacturer of packaging machines, including thermoforming packaging machines, MAP modified atmosphere packaging machines, VSP vacuum skin packaging machines, Vacuum packaging machines.

Modified atmosphere packaging machine for fresh seafood packaging

ready to eat meal modified atmosphere packaging machine

Semi-auto tray sealing machine for MAP modified atmosphere packaging


  1. Customizable mold for different shape and size of trays/ bowls;
  2. SUS304 stainless steel structure
  3. Single mold/ Dual molds available
  4. Speed: 3-4 cycles per minute
ready to eat meal modified atmosphere packaging machine

Automatic  inline  tray  sealing machine


  1. Suitable for various types of trays/bowls
  2. SUS304 stainless steel structure
  3. Auto loading available
  4. Conveying belt for easy finished packs unloading

ready to eat meal modified atmosphere packaging machine

Thermoforming packaging machine for MAP packaging


  1. Fits both rigid tray and flexible packages
  2. Trays containers automatically formed
  3. Fully automatic packing solution
  4. SUS304 stainless steel structure

To ask for a quotation regarding our modified atmosphere packaging machines, please write email to [email protected], Whatsapp/Wechat 008615006621108. To find our location for convenient visit, please simply google ‘SHANDONG KANGBEITE’ at GOOGLE MAP.