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How to use plastic lunch boxes correctly? Bento boxes are also called fresh-keeping boxes, lunch boxes, lunch boxes, etc. There are three kinds of fresh-keeping boxes: one is plastic fresh-keeping box, which is made of resin material. The general temperature resistance range is 120 ℃ for high temperature and - 20 ℃ for low temperature. One is tempered glass fresh-keeping box, which is made of tempered glass. The other is heat-resistant glass fresh-keeping box, which is made of high borosilicate glass.
As consumers pay more attention to health, people pay attention to whether the materials used in the fresh-keeping box are healthy. Hygienic and safe materials are harmless to human body, such as PC materials, PE materials and PP materials. PP materials are the most common fresh-keeping box materials. Plastic fresh-keeping boxes cannot be put into microwave ovens and ovens, because plastic will produce substances harmful to human body under high temperature. In addition, the tempered glass fresh-keeping box may explode when encountering extreme cold and heat. At present, the fashionable and green fresh-keeping box is a heat-resistant glass fresh-keeping box.
Different shapes store different things, making it easier to use. In addition to the common square, rectangle and circle, there are also sets specially designed for picnic, making life easier and more convenient.
Square packing box: excellent sealing performance, suitable for storing food, preventing the refrigerator from smelling, suitable for storing various condiments, leftovers, leftover cans, fruits and vegetables. It is convenient to put in the refrigerator, freezer, microwave oven, and can also be used for other purposes.
Rectangular packing box: suitable for storing bacon and meat food. Because of the water board, it is easy to store food with water. Large capacity rectangular fresh-keeping box is suitable for storing fruits, vegetables and seafood.
Round packing box: It is suitable for long-term storage of various condiments, canned fruits, cereals, nuts, tea and other foods, and is convenient for use in refrigerators, freezers and microwave ovens. The oblong design is suitable for storing drinks, children's milk and various cereals, nuts and tea during the picnic.
High tube packaging box: It is suitable for storing long strip foods such as noodles and cucumbers. Because the height size of high tube packaging box is higher than that of ordinary packaging box, and the requirements for mold size and mold withdrawal are high in processing technology, there are few manufacturers that can produce high tube packaging box in the market, and there are relatively few products.