What are the important factors that affect the preservation effect of modified atmosphere packaging?

The characteristics of the modified atmosphere food preservation packaging machine are that the reproduction of bacteria and microorganisms can be inhibited to a large extent by the preservation gas, the preservation and quality time of food can be prolonged, and the original flavor, taste and characteristics of the food can be maintained in this form.

We know that the basic conditions for the growth of bacteria are nothing more than sufficient nutrition, suitable temperature and humidity, suitable PH value, suitable dissolved oxygen, etc. These conditions are easy to exist in the food production environment and food. Therefore, Taking measures to control the breeding source of bacteria is an important task for food producers, and it is also one of the important prerequisites to ensure that the food of the modified atmosphere fresh-keeping packaging machine can obtain a longer freshness and quality preservation time. What we call the fresh-keeping gas in the modified atmosphere fresh-keeping packaging can only inhibit the reproduction of bacteria, but cannot fundamentally eradicate the bacteria. The number of colonies adsorbed on the food surface before packaging will directly affect the freshness and quality preservation time of the food after modified atmosphere packaging.

1. Requirements for the production workshop of modified atmosphere fresh-keeping packaging

There should be a relatively independent packaging clean workshop, the clean room grade should not be lower than GB50687-2011 grade III, the ambient temperature should be lower than 15 ℃, and ultraviolet and ozone sterilizers should be set for regular disinfection. The floor, wall, etc. should be compatible with the required clean room grade, which can prevent food, food contact surfaces and food packaging from being contaminated to a large extent. Raw materials, semi-finished products, finished products, raw and cooked food, and packaging should be independent It is processed and manufactured in a completely separated production area; the entry and exit routes of production personnel in different clean areas should be strictly separated, the equipment layout should be arranged according to the production process, the same type of equipment should be appropriately concentrated, and the staff in the clean room should be limited to a very small extent . There should be adequate distances for safe maintenance and cleaning between operating stations, between equipment, and between equipment and the building envelope.

The process design should make the food transportation distance short and avoid the round trip of personnel and materials (items). The logistics entering the clean room should be separated from the flow of people, and different channels should be used to achieve one-way transportation without crossing.

2. The requirements of modified atmosphere fresh-keeping packaging for production personnel

Before entering the packaging workshop, personnel should strictly change their shoes, clothes, caps, masks, etc. The passing room should include rain gear storage, shoes, coat storage, toilet, washroom, shower room, and clean or sterile work clothes. , changing sterile shoes and air shower room and other parts. The undressing area and the area for wearing clean clothes in the changing room should be separated, and the area for wearing clean clothes should be designed according to the GB50687-2011 Class III-IV clean room standards. Before entering the workshop, the shielding protection of the mouth, nose, ears and hair should be checked, and the hands should be carefully cleaned and disinfected in strict accordance with the operating procedures. In addition to cleaning sites, hand sanitizers or hand sanitizing wipes should be added to appropriate locations in production personnel passages.

3. Requirements for food processing utensils and packaging materials for modified atmosphere fresh-keeping packaging

It is mentioned that tools and containers used for food processing should be dedicated, disinfected before use, washed after use and stored in special cleaning facilities.

Workbenches, logistics equipment and packaging equipment in the workshop should be disinfected before use and cleaned after use. If it cannot be cleaned, the method of wiping should be used to keep it clean. The packaging materials entering the clean area should be cleaned, blown and unpacked in the unpacking room. The unpacking room should be set up across the clean area and the non-clean area.

Compared with vacuum packaging and nitrogen-filled packaging, the one-stop modified atmosphere packaging solution for chilled fresh meat is superior in terms of color, taste, nutritional value and shelf life, allowing food processing companies, supermarkets and consumers to be more diverse. Benefiting from this, food processing enterprises can maintain the quality and freshness of chilled meat by adopting modified atmosphere packaging technology, thereby increasing the added value of products, enhancing competitiveness, and establishing a good corporate image of high quality and hygiene. At the same time, it prolongs the fresh-keeping period of chilled fresh meat, reduces waste caused by premature deterioration of meat products, helps enterprises to reduce the number of deliveries, expand the scope of marketing, and improve efficiency and benefits. , maintains a bright color, transparent and visible, and has a variety of appearances, attracting consumers to buy. Airtightness and wear resistance can effectively prevent leakage and odor, slow down the speed of meat spoilage, extend the shelf life, and reduce costs reasonably. For consumers, modified atmosphere packaging allows people to enjoy fresh and safe chilled food Meat, keep it original. Even the "noble" meats such as Australian steak and beef tongue can lock in freshness, retain their delicious taste and reduce the loss of nutritional value. The application of modified atmosphere packaging machines has greatly enriched the choices of consumers and improved the quality of life. In the era of intelligent packaging, the one-stop modified atmosphere packaging machine solution comprehensively and quickly solves the large-scale production of chilled meat, long-distance transportation and long-term The whole process of preservation is the problem in refrigerated display. It will help to improve the overall technical level of China's packaging industry and further integrate with the international market, so that meat products can truly adapt to and integrate into modern large-scale markets and modern sales models; at the same time, it will enrich the "vegetable basket" to meet consumers' edible needs and improve people's consumption. standard of living.