Does the packaging material have an effect on the exhaust of cans?

(1) glass jar: a container made of glass, which has the advantage of transparency and is convenient for consumers to observe and choose; Stable chemical properties, strong acid resistance and sulfur resistance, will not change color, taste or deterioration due to interaction with food, especially suitable for filling foods with strong acidity such as fruits and vegetables, with rich raw materials, low price and recycling. Disadvantages are: heavy, easy to break, inconvenient to transport and poor thermal conductivity.

(2) Tin can: It is made of tinplate and is the most widely used container at present. Tin cans are vertical, oblate, trapezoidal and square. Its advantages are: soft, easy to bend, stretch and punch, lighter than glass jar, not easy to break, convenient to carry, transport and keep, good thermal conductivity, short sterilization time and not easy to break when the temperature changes sharply. Disadvantages: high cost, poor chemical stability, easy to react with the food in the can, so that the iron sheet corrodes and the food in the can deteriorates.

(3) Plastic tank: the tank body is made of polypropylene plastic sheet container, and the cover film is made of composite film by hot melt sealing. Sealing and sterilizing. The tank body is made of transparent milky white materials with various shapes and specifications. The covering film has a single layer of polypropylene and two or three layers of composite film. This kind of tank has the advantages of high temperature resistance, no corrosion, light weight, low price, convenient opening and good display. Shanghai Xilinmen Food Factory and the Second Oil Factory use it to fill bean paste and margarine, which is very popular with consumers.

(4) Soft tank: made of multilayer composite film. Soft cans developed by Shanghai Food Industry Research Institute are generally divided into three layers: the outermost layer is polyester plastic film, which has certain strength, puncture resistance and friction resistance and is suitable for printing; The middle layer is aluminum foil, which has air isolation and shading properties; The innermost layer is modified polyethylene plastic film, which is non-toxic and harmless, meets the requirements of food safety and hygiene regulations, and can be sealed by hot melt. Its advantages are portability, hygiene, practicality and portability, which can greatly reduce the transportation volume of goods. At present, it has been widely used abroad and has broad development prospects. Aluminum cans, stainless steel cans, etc. , which is rarely used at present, will not be introduced here.