Now on the market, lunch boxes are mainly plastic, glass, ceramic, wood, stainless steel, aluminum and other materials. Therefore, when buying lunch boxes, we should pay attention to the material problem. In order to make the plastic lunch box easier to process and shape, plasticizer will be added to enhance the flexibility of the plastic.
Each plastic has its heat tolerance limit, currently the most heat resistant is polypropylene (PP) can withstand 120 ° C, followed by polyethylene (PE) can withstand 110 ° C, and polystyrene (PS) can only withstand 90 ° C.
At present, commercially available plastic lunch boxes for microwave ovens are mainly made of polypropylene or polyethylene. If the temperature exceeds their heat resistance limit, plasticizer may be released, so it is necessary to avoid heating plastic lunch boxes with high temperature for a long time.
If your plastic cutlery is lumpy, discolored, and brittle, it's a sign that your cutlery is aging and should be replaced.
As for how long a plastic lunch box "life" can be, depends on personal use and cleaning methods, most plastic products are generally in the shelf life of three to five years, if frequently used, one to two years to replace better.
But we do not need to "see plastic eclipse", plastic lunchboxes used to pack sushi, fruit and other food, also has its unique advantages, from the cost performance, appearance level to this is the insulation lunchbox is difficult to rival.
Post time: Oct-13-2022