Disposable lunch boxes are commonly used in daily life, but do you know how many types of disposable lunch boxes there are? Today we will learn about the types of disposable lunch boxes together.
1、 Plastic type
Disposable lunch boxes made of plastic mainly include PP polypropylene and PS polystyrene, both of which are non-toxic, odorless, and odorless. PP is relatively soft. The usage temperature of PP is generally between -6 ℃ and+120 ℃, making it particularly suitable for holding hot rice and vegetables. It can be heated in a microwave or even steamed in a steam cabinet. The usage temperature of modified PP material can be controlled between -18 ℃ and+110 ℃. This PP material lunch box can not only be heated but also be refrigerated for use in the refrigerator.
PS material is relatively hard, transparent, but easy to tear. PS begins to soften when the temperature reaches 75 ℃, making it unsuitable for serving hot rice and vegetables. But PS material has good low-temperature performance and is a better material for packaging ice cream. Some lunch box factories use PP material for boxes and PS material for lids in order to reduce costs. The advantage is that the lid is transparent, the PS is relatively hard, and thinner sheets can be used to reduce costs. But for this designed disposable lunch box, consumers must understand the difference between the two materials and remember not to put the entire lunch box together with the lid into the microwave for heating.
2、 Cardboard type
The disposable cardboard lunch box is made from 300-350 grams of bleached kraft wood pulp cardboard and is processed through die-cutting, bonding, pressing, and molding. In order to prevent oil or water leakage, it is necessary to coat the surface or apply chemical additives. It has no toxicity or side effects on the human body during production and use. However, the quality requirements of cardboard are higher, and the cost also increases accordingly.
3、 Starch type
A disposable meal box made from starch as the raw material, as the name suggests, is made from starch plants, added with dietary fiber and other edible additives. It is refined using techniques such as biological compounding, glycan cross-linking, and calcium ion chelation. The usage temperature is between -10 ℃ and+120 ℃, especially suitable for holding hot food and dishes. It can be heated in a microwave or refrigerated in a refrigerator.