Material and development of disposable plastic fast food lunch box


There are two types of plastic lunch boxes on the marke […]

There are two types of plastic lunch boxes on the market. One is foamed plastic lunch boxes and the other is food-grade plastic lunch boxes. The foamed lunch boxes will produce toxic substances at high temperatures and the foamed plastic tableware is difficult to recycle after being used up. , Has been gradually replaced by food-grade lunch boxes. The blister lunch boxes are made of food-grade raw materials. There are two processes: injection molding and blister molding. Injection molded lunch boxes are relatively cheap due to the one-time molding process and are transported due to thin walls. In order to solve this problem, the blister lunch box came into being to make up for this deficiency. Being tough enough is the representative of the blister lunch box. Due to the difference in technology, the blister lunch box is perfectly solved and easily broken. With the efforts of various generations of molders, the sealing performance of the blister multi-grid lunch box has been well extended and developed, which has solved the problem of odor between various foods. The raw materials of disposable blister lunch boxes are mainly PP polypropylene and PS polystyrene, both of which are environmentally friendly and non-toxic. PP is soft, and can withstand low temperatures and high temperatures. The operating temperature is between -6 degrees and 120 degrees, modified The operating temperature of PP can be controlled from -18 degrees to +110 degrees. In addition to heating to 100 degrees, the blister box made of this PP can also be used in the refrigerator. PS is hard and transparent, but easy to tear. PS starts to become soft when the operating temperature reaches 75 degrees, so it is not suitable for hot rice and dishes, but PS is very resistant to low temperatures and is very suitable for ice cream packaging materials.

In order to reduce costs, some disposable blister lunch box factories use PP as the box and PS as the lid. The advantage is that the lid is transparent, and the PS is harder and can be made of thinner materials to reduce costs. However, this kind of planning consumers It is necessary to understand the differences in the materials of the two disposable plastic lunch boxes, and remember not to put the entire blister lunch box with the lid into the microwave at the same time.

Plastic products will one day be replaced by environmentally friendly materials. Although there will be a long period of time to be connected, environmentally friendly disposable plastic tableware will eventually become mainstream products. At present, many environmentally friendly materials have already appeared, such as corn flour materials, Ganshu materials, PLA, CPLA, etc. These materials often have a mutual characteristic that is degradable, and some materials are partially degradable, but in special It can be completely degraded in the natural environment, but the price of this degradable material is very high, and most of them must be imported. Therefore, manufacturers that produce disposable plastic tableware generally have not yet mass-produced, that is, due to increased costs, After the product is made, the price will be very high, and it is not very good in the sales market.

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