Food PSA N2 Equipment for Vertical Packing Machine

Food N2 Equipment for Vertical Pack Machine
1) N2 Purity: 95%~99.9995%
2) N2 Capacity: 3~3000Nm3
3) N2 Pressure: 0.1~0.8MPa

Food PSA N2 Equipment for Vertical Packing Machine
(1) Food package

Traditional vacuum package is rapidly replaced by nitrogen-filling package, which is applied in package of fired food, puffed food, bakery food, and fresh slices of various farm products, special cheese and fresh meet. Because nitrogen-filling package can more effectively maintain taste and nutrition of foods, it is expected to further develop its application.

Because oxidation action is generated by involving in O2, It causes microbe and bacterial reproduction and leads to food spoilage and deterioration. As a kind of suffocating inert gas, N2 can suffocate and inhibit bacterial reproduction. The aim of using N2 is to purge O2, relieve oxidization and respiration of foods. Moreover, N2 has low solubility in water and grease. And foods have small adsorption effect on N2. Therefore, N2 can be used as a good gas for preserving foods and keeping foods fresh.

In addition, nitrogen-filling package can effectively protect the shape of food in package; prevent crumbly food from being crushed; avoid packed food adhesion together under pressure due to unbalance between interior and exterior pressures; avoid food packed food stiffening. Although food has irregular shape, beautiful shape of package can be maintained in order to avoid food deterioration caused by damaged package due to surface folding.

Edible oils and non-carbonated beverage may also benefit from nitrogen. In some bottles or containers, there are ”Head Spaces ”between liquid and lids where air is replaced by nitrogen, thus the life of liquid can be prolonged up to 500%.

 

(2) Beverage Mixture

Oxygen dissolved in liquid and oil can cause precipitation. Oxygen existing in beverage can make the taste become bad and shorten its life. Gaseous nitrogen is conveyed in liquid during processing by applying a kind of method known as “mixture” (liquid is mixed by compressed air through sprayer). These nitrogen bubbles can remove oxygen in order to prevent non-carbonate beverages (fruit juice, tea and milk) and edible oils (peanut, olive, sunflower and rape oils) from being oxidized, deteriorated and faded.

 

(3) Nitrogen Expansion

For other foods, it is required to add gas for increase food volume. Nitrogen is used to puff edible oils, mayonnaise, margarine in barrel or peanut oil products for increasing their volumes and expansibility, so as to prolong their life.

When fruits and vegetables are kept in their optimum refrigerated storage temperature, their respiratory rates will decrease, and when applying nitrogen to make the oxygen level in storage equipments decrease to 2-5%, the respiratory rates of fruits can be further decreased. If fruits are kept in an optimum temperature, they can be preserved for 2-3 months; however, if nitrogen is applied to decrease oxygen content in storage containers, the same fruits can be preserved for more than one year. Most easily-rotten fruits, especially like apples, bananas, pears, berries and kiwis, may be prolonged their freshness by balancing nitrogen, oxygen and CO2 in refrigerated containers.

 

Application Range of Nitrogen in Food Package

    Gas-adjusting package and nitrogen package of fruits, vegetables, flowers, tea leaves; Nitrogen package of puffed food, custard pie, milk bread, European-style egg roll, various cookies; Nitrogen package of farm products and local special products, such as rice, seed and chestnut, etc.