The present meal box production line is basically made of polystyrene. Polystyrene is a kind of widely used polymer material, which has the characteristics of low toxicity, high melting point, strong plasticity and easy production, so it has become the first choice material for making disposable fast-food boxes. So how to choose?

1. Look at tightness

The food boxes should be sealed in plastic packaging bags. The packaging bags should not be damaged. The food boxes with imperfect packaging are easy to be polluted by the environment and hygiene can not be guaranteed.

2. Look at the outer packing

Carefully check whether the packaging mark is marked with "product name, manufacturer name, factory address, product implementation standard, production date, shelf life, sanitary license" and other national provisions must be marked content, if the content of the mark is not complete or not standard, then it is best not to buy such a lunch box.

3. The box body

The color and luster of a good meal box body should be uniform and clear in outline, and the mouth of the box should not be obviously sunken or wrinkled.

4. See the jar

Note that the box mouth is flat and smooth, no waste edges, burr, the cup body should be clean and transparent, uniform thickness, no impurities, bubbles, water lines, no fish-eye block phenomenon

5. A squeeze

To choose a box with a better body hardness, try to choose a box with thick and stiff walls. When choosing a box, you can use your hand to gently squeeze on both sides of the box to roughly know the hardness of the box body.

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