With plastic takeout containers are mainly made of PP polypropylene and PS polystyrene two kinds

by:Weihan     2020-06-13
With plastic food tray lunch boxes are made of PP polypropylene and PS polystyrene two kinds, all slaughter, non-toxic tasteless, odorless, PP is relatively soft, general PP using temperature is - 6 degrees to + 120 degrees, so especially suitable for holding a hot meal hot food, it can be heated in the microwave, or even in the steam gas cooking, modification of PP can be controlled in - its working temperature 18 degrees to + 110 degrees, the PP made lunch box besides can be heated to 100 degrees to use, more can be used to refrigerate. PS is hard, and transparent, but easy to tear, PS began to grow soft when use temperature is 75 degrees, so not suitable for holding a hot meal hot food, but the low temperature properties of PS is very good, is the best ice cream packing materials. Some lunch box in order to reduce cost, use do PP box, the use of PS in the lid, the lid benefit is transparent, and PS is relatively hard, can be made with relatively thin material, reduce the cost, but this kind of design consumers must understand the differences of two materials, remember not to connect the whole bento lid were heated in the microwave.
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