After the food is packaged, if the package is not effectively anti-fogged, the packaged product should generally be stored in a cold storage, and the airtight and narrow space in the packaging box/bag is inversely proportional to the temperature. The lower the temperature is The greater the humidity. When the ambient temperature reaches the dew point temperature of the packaging box gas, the water vapor is likely to condense on the packaging cover film or the surface of the packaging box to form water droplets, which affects the appearance and quality of the product. Therefore, packaging films for high-end products such as Zhou Hei Ya need to be treated with anti-fogging to become anti-fogging films for food packaging.
Modified atmosphere packaging film (anti-fog film for food packaging) is an essential packaging consumable in the modified atmosphere preservation packaging process. Modified atmosphere packaging film is currently in the growth stage of domestic technology, and its anti-fogging, easy-tear formula, and mature technology are few manufacturers.
In the process of keeping the packaged food fresh, the modified atmosphere packaging machine cannot do without packaging boxes, packaging film and other consumables, and the modified atmosphere packaging boxes and packaging film consumables need to meet certain material requirements. This article states the key information of modified atmosphere packaging film as follows:
Modified atmosphere packaging film is a film (also called cover film) used to thermally plasticize packaging boxes, and is a packaging consumable for modified atmosphere packaging. Modified atmosphere packaging is used for the fresh-keeping packaging of cooked food, fresh meat, fruits and vegetables, seafood and other videos. It directly contacts these packaged foods, and its material requirements require food-grade plastic materials. Among them, the packaging box generally requires PP material; the packaging film needs to use PP, PET//PE composite film, and use environmentally friendly and non-polluting food-grade ink on PET and PA, and then the printed modified atmosphere packaging film is made of PP and It is made of PET/PA compound, and its thickness is generally about 40~70 microns. According to the characteristics of anti-fogging and easy tearing, air conditioning can be divided into four categories: ordinary film (that is, neither anti-fogging nor easy to tear), anti-fogging film, easy tearing film, and anti-fogging easy tearing film; according to whether it is printed, it can be divided into: There are two types of transparent film and printing film.
The material of the modified atmosphere packaging film belongs to the anti-fog easy-tear film process, which is the most complicated and the price is also the highest. Shanghai Yifu Packaging specializes in the production of anti-fogging and easy-peeling films of various PP materials, and provides customers with modified atmosphere packaging film design, plate making, material selection and other services.
In addition, the BOPP anti-fog film has the ability to prevent the formation of water mist on the surface of the film due to the evaporation of water under high and low temperature changes, and has a certain antibacterial and antibacterial effect. It is a new material that has developed rapidly in the world and is mainly used for food, fresh fruit, Packaging for vegetables, salads, etc. Have:
(1) Good anti-fog effect (anti-fogging in cold and hot conditions), excellent gloss and transparency, and good printability;
(2) Good water vapor barrier properties, keeping the moisture content of fruits and vegetables, preventing dryness due to dehydration;
(3) Suitable oxygen permeability to maintain the breathing of fruits and vegetables:
(4) Suitable surface friction coefficient;
(5) It can have heat sealing performance;
(6) Antibacterial substances are added to have antibacterial function;
(7) Good flexibility, close to the packaging;
(8) It is more environmentally friendly than PVC.