CPP composite film cooking bag -- "soft can" in daily life
With the development of science and technology and economy, in the fast-paced life, convenient packaged food is more and more popular. Among them, plastic packaged meat food, cooked food and ready to eat food have become regular customers in supermarket shelves. The packaging of these foods is no longer the traditional tin cans, but gradually turned to plastic bags. Of course, this is not an ordinary packaging bag, but a cooking bag with high temperature resistance. In this paper, we will explore the cooking bag.
High temperature cooking bag is a kind of composite plastic film bag which can be heated. It has the advantages of can container and boiling water resistant plastic bag. Food can be sterilized and packaged in bags at high temperature (generally 115-135 ℃). Cooking bag packaging is not only convenient, hygienic and practical, but also can maintain the original flavor of food. Therefore, it quickly occupies the market and becomes a better friend in our life.
Comparison of advantages and disadvantages between cooking bag packaging and traditional packaging
① Tinplate cans and glass bottles are hard packaging containers with large volume and heavy weight, especially the glass bottles are fragile, which is not convenient for long-distance transportation; and the chemical corrosion resistance of tinplate is not good, especially when metal ions are easy to separate out when acid food is loaded, which affects the food flavor. The high-end cooking film (such as high-performance nylon cooking film) has good adaptability to strong acid and alkali, and it is easy to carry. Moreover, the cooking bag packaging is also known as "soft can".
② Compared with the traditional tin can made of tinplate, the shelf life of high-temperature cooking bag is slightly shorter. Generally, the shelf life of high-temperature cooking bag is about one year. Due to the high-temperature cooking resistance and high barrier property, the shelf life of canned food can reach more than 2 years. However, in daily life, the high-temperature cooking bag has basically met the quality requirements of most products Period.
③ Energy saving and low manufacturing cost.
④ It has good printing effect, beautiful appearance and diversity.
Classification of cooking bags by temperature grade
① It can be cooked and sterilized at 121 ℃ for 40 minutes;
② Resistant to 100 ℃ boiling water;
③ It can be sterilized by cooking at 135 ℃ for 40 minutes.
The latter can basically kill all bacteria and achieve the purpose of long-term food preservation under non cold storage conditions.
Of course, the high-temperature cooking bag is not made of single-layer plastic film, but often needs multi-layer film composite. The common materials in life, such as CPP, PE, BOPA, BOPP, BOPET and so on, are often compounded according to different food requirements to ensure the food packaging requirements are met. At present, there are still manufacturers constantly developing high-performance films. In the future, with the development of free trade, China's food market is facing opportunities and challenges. With the weakening of China's demographic dividend, the technical content will become a chip in the competition among enterprises. I believe that in the continuous promotion of enterprise reform, China's plastic film will also have more unexpected results.
Article label: cooking bag