Plasticizer can enhance the flexibility of plastic, making it easier to process, plastic, industrial has been widely used. Each plastic has its heat-resistant limit, the most heat-resistant polypropylene (PP) can withstand 140 ℃, followed by polyethylene (PE) can heat 110 ℃, and polystyrene (PS) is only resistant Heat to 90 ° C.
At present, the commercial use of microwave ovens for plastic lunch boxes, mainly made of polypropylene or polyethylene, such as the temperature exceeds their heat limit, plasticizer has the possibility of release, it should avoid long-term use of high temperature heating plastic lunch boxes.
What are the hazards of plasticizers to the human body?
According to the survey found that plasticizers will interfere with the human endocrine system, the human body, especially the male reproductive system have an impact. Animal studies have shown that long-term large intake of plasticizers may damage the liver, kidneys and affect developmental growth. Pay attention to it! Plastic tableware is uneven, indicating that your tableware is the time for the change.
Plastic products are also shelf-life, after the expiration of the plastic will be aging, discoloration, brittle situation, such as the use of plastic box found yellow or no longer transparent, should be replaced as soon as possible.
Consumers must pay attention to the shelf life of plastic products. Aged plastics may release substances that may be harmful to the human body.
As for a plastic lunch box "life" can be how long to look at personal use and cleaning methods, most of the plastic products shelf life is generally about three to five years, if used frequently, one to two years to replace better.