The high-temperature cooking bag is a wonderful thing. We may not notice this packaging when we usually eat. In fact, the high-temperature cooking bag is not an ordinary packaging bag. It contains a heating solution and is a composite type. The characteristic packaging bag, it can be said that the high temperature cooking bag combines the characteristics of the utensil and the cooking bag. The food can be intact in the bag, after being sterilized and heated at high temperature (usually 120~135℃), it can be eaten after removing it. After more than ten years of use, it has been proved that it is an ideal sales packaging container. It is suitable for the packaging of meat and soy products, which is convenient, hygienic and practical, and can well maintain the original flavor of the food, which is favored by consumers.
It is understood that the earliest packaging that can store meat food at room temperature is canned food, which is an iron can made of tinplate, and later uses glass bottles as outer packaging. Both tinplate and glass bottles have high temperature cooking resistance and high barrier properties, so the shelf life of canned food can reach more than 2 years. However, because tinplate cans and glass bottles are rigid packaging containers with large volume and heavy weight, tinplate has poor chemical corrosion resistance, especially when loaded with acidic food, metal ions are easily precipitated, which affects the flavor of food. In the 1960s, the United States invented the aluminum-plastic composite film in order to solve the packaging of aerospace food. It is used to package meat food, and it can be stored at room temperature through high temperature and high pressure sterilization, with a shelf life of more than 1 year. The role of the aluminum-plastic composite film is similar to that of a can, which is soft and light, so it is named "soft can".
In terms of food packaging, high temperature retort bags have many unique advantages compared to metal canning containers and frozen food packaging bags:
①Maintain the color, aroma, taste and shape of food.The retort bag is thinner, and can meet the sterilization requirements in a short time, and preserve the original color, aroma, taste and shape of the food as much as possible.
easy to use.The retort pouch can be opened easily and safely. When eating, put the food together with the bag into boiling water and heat it for 5 minutes to open and eat, even without heating.
②Convenient storage and transportation. The cooking bag is light in weight, can be stacked and stored, and occupies a small space. After packaging food, the space occupied is smaller than that of a metal can, which can make full use of the storage and transportation space and save storage and transportation costs.
save energy. Due to the thinness of the cooking bag, the bag can reach the lethal temperature of bacteria faster when heated, and the energy consumption is 30-40% less than that of the iron can.
③easy to sell. The retort bags can be packaged or combined with different foods according to market needs, and customers can choose at will. In addition, due to the beautiful appearance, the sales volume has also been greatly increased.
④long storage time. Foods packaged in retort pouches that do not require refrigeration or freezing, have a stable shelf life comparable to metal cans, are easy to sell, and are easy to use at home.
⑤lower manufacturing cost. The cost of the composite film for making the retort bag is lower than that of the metal plate, and the production process and required equipment are much simpler, so the price of the retort bag is lower.
Product structure of high temperature cooking bags
Generally divided into three categories: two-layer film, three-layer film and four-layer film structure.
The two-layer film is generally BOPA/CPP、PET/CPP；
The three-layer film structure is PET/AL/CPP、BOPA/AL/CPP；
The four-layer film structure is PET/BOPA/AL/CPP，PET/AL/BOPA/CPP。
High temperature cooking resistance inspection
After the bag is made, put the same volume of content into the bag and seal it well (Note: the content is similar to the content specified by the customer, and try to exhaust the air in the bag when sealing, so as not to affect the test effect due to air expansion during cooking)，Put it into the ts-25c back pressure high temperature cooking pot, and set the conditions required by the customer (cooking temperature, time, pressure) to test the high temperature cooking resistance; the manufacturing process of the high temperature cooking bag is currently the best cooking bag in the world. Most of them are manufactured by dry compounding method, and a few can also be manufactured by solvent-free compounding method or co-extrusion compounding method.
Appearance inspection after cooking: the bag surface is flat, without wrinkles, blistering, deformation, and no separation or leakage.
Post time: Jul-18-2022