In recent years, the disposable fast food box on the market has changed from a foam lunch box to an environmentally friendly lunch box. The original foam lunch boxes has been eliminated because it is not resistant to high temperature and the production process has caused damage to the environment. Instead, plastic lunch boxes, paper lunch boxes, wooden lunch boxes, degradable lunch boxes and so on.
The raw materials such as polystyrene, foaming agent and photosensitizer used in fast food boxes can not be underestimated. Using polystyrene as raw material, if the free monomer styrene in the product is released by heating, it will be harmful to the central nervous system, kidney and liver, so long-term use will increase the risk of illness.
Among them, plastic has become the mainstream material for manufacturing disposable fast food boxes because of its low toxicity, high melting point, strong plasticity, simple production and low relative cost. Such as PP plastic lunch box, corn starch degradable lunch box, etc. PP polypropylene, with excellent mechanical and thermal properties, is suitable for food packaging. PS polystyrene is rigid and brittle, non-toxic and tasteless, especially suitable for packaging frozen foods such as cakes or salads.
From the initial foaming type to the degradable type, disposable foaming lunch boxes are widely used and the consumption is increasing. Office workers and students are the main people who use disposable lunch boxes. The reporter learned that most people know that disposable lunch boxes are controversial from the perspective of hygiene and environmental protection.
However, it is because of convenience that it will continue to be used. Not all disposable lunch boxes on the market now meet the national standards. Long-term use of unqualified lunch boxes will have adverse effects on the body, and self-provided lunch boxes are the first choice.
Hygienic physical and chemical indicators include evaporation residue and heavy metal content. The evaporation residue is the evaporation residue of ethanol, acetic acid, n-hexane and water, which respectively simulates the use of soup, wine, oil and acetic acid. Among them, paper tableware is prone to unqualified soaking in acetic acid and n-hexane, plant fiber is prone to unqualified soaking in acetic acid and ethanol, and edible powder is prone to unqualified soaking in ethanol and n-hexane. The evaporation residue is large, indicating that there are a lot of talcum powder and calcium carbonate in tableware, which are insoluble in gastric acid and will form stones over time.
Long-term use of disposable lunch boxes will have adverse effects on human kidneys and liver. At present, there are many manufacturers of disposable lunch boxes, and no one can guarantee that the processing technology is in place. In addition, the components of disposable lunch boxes are some compounds that are difficult to degrade and have certain toxins themselves. If it is used to hold high-temperature food, its toxin will be transferred to food, which will adversely affect some organs of the human body.
Conclusion Perhaps in the impression of many people, plastic fast food boxes may be a healthier one, and those with white foam are the most harmful. In fact, the harm is there, but the size is different. If you must eat fast food, I suggest you bring a clean lunch box!