Disposable lunch boxes are all plastic products, so it is best not to use them for a long time. Plastics are mostly made of polyvinyl chloride, which releases toxic substances when exposed to high temperature, and it is harmful to health when it enters the body with meals.
Disposable foamed plastic lunch boxes and plastic bags for food seriously affect our health. When the temperature reaches 65℃, harmful substances in disposable foamed plastic tableware will penetrate into food, causing damage to human liver, kidney and central nervous system.
Disposable plastic snack boxes are made of polystyrene, which is a widely used polymer material. Because of its low toxicity, high melting point, strong plasticity and simple manufacture, it has become an excellent material for making disposable lunch boxes with low price and disposable use.
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How to distinguish the quality of disposable lunch boxes;
At first glance, it depends on whether there is a QS logo and number on the lunch box; Secondly, it depends on whether the surface of the lunch box is smooth. Please keep this mark for impurities or black spots. Generally speaking, transparent plastic lunch boxes are made of pure polypropylene (PP) with high safety factor. Brightly colored lunch boxes may use waste plastic, so the darker the color, the less safe it is. It is understood that now more and more regular hotels choose lunch box king's packaging box, using food-grade imported pp plastic, without adding any additives to ensure health and environmental protection.
The second touch is the strength of touching the lunch box. Lunch boxes produced by recycling waste products or adding a lot of industrial-grade calcium carbonate and talcum powder are generally poor in strength and will be broken when they are gently torn.
The third smell is to smell the lunch box, and the qualified lunch box can't smell it.
The characteristics of "black lunch box" can be summed up as six jingles: soft, easily torn, pungent, easily leaked when heated, hand-folded with paraffin traces, torn into water and sank. As long as you remember the jingle above, you can easily tell whether the disposable lunch box is qualified or not and whether it is environmentally friendly.