Try to choose a thick and stiff lunch box.. Look at the box body. The poorly packaged lunch box is easy to be polluted by the environment, and hygiene cannot be guaranteed. Squeeze a squeeze. Among them, plastic has become the mainstream material for manufacturing disposable fast food boxes because of its low toxicity, high melting point, strong plasticity, easy production and relatively low cost.In recent years, disposable fast food boxes on the market have shifted from foam lunch boxes to environmentally friendly lunch boxes. Look at the tightness. 5. How to buy disposable lunch boxes is environmentally safe, sanitary and rest assured? 1. There should be no obvious dents or wrinkles in the mouth of the box. 3. Lunch boxes, wooden lunch boxes, degradable lunch boxes, etc. Such as PP plastic lunch box, corn starch degradable lunch box, PP polypropylene, with excellent mechanical and thermal properties, suitable for food packaging. Generally, the lunch box should be sealed in a plastic packaging bag, and the packaging bag should not be damaged. When choosing a lunch box, you can gently squeeze both sides of the lunch box with your hands.
The original foam lunch boxes are not resistant to high temperatures and the production process causes damage to the environment. If the marking content is incomplete or irregular , It is best not to buy such a lunch box. The color and luster of the good-quality lunch box body should be uniform and the outline should be clear. PS polystyrene is hard and brittle, non-toxic and tasteless, especially suitable for frozen food recentage lunch box packaging such as pastries or salads. 4. Look at the outer packaging, carefully check whether the packaging label is marked with ‘product name, product implementation standard, production date, shelf life, sanitation license’ and other national regulations that must be marked.
You can roughly know The hardness of the box body is good or bad. Look at the mouth of the box, pay attention to the mouth of the box is flat and smooth, without waste edges, burrs, and the cup body should be clean and transparent, uniform in thickness, free of impurities, bubbles, water lines, and fisheyes. Choose a lunch box with a good rigidity. If the inner wall of the box is rough and the hand feels astringent, it means that there are solid residues on the inner wall; when exposed to light, there are obvious irregular small black spots in the material of the box surface; if there is, it is an inferior product. 2