National hotline
+86-519-86255607
1: Visual inspection of the appearance of the lunch box: the lunch box with good quality is very regular in appearance, with clear edges, corners and lines, and the inside and outside of the product are smooth; The thickness of the four corners of the box is uniform, without sand holes, the overall edge of the box is cut flat, and the buckle should be easy to open and close. Unqualified or fake environment-friendly plastic lunch boxes do not meet the above conditions.
2: Hand touch: The lunch box with good quality feels smooth and has strong toughness and elasticity. Because a large amount of filling materials are added to inferior lunch boxes, the strength of the resin is reduced, which makes them feel very soft when touched, and the inner layer feels like fine sandpaper. If you tear it with your hands, it will be as easy as tearing kraft paper.
3: Poor quality lunch boxes can smell a pungent taste, especially those that have been heated. This is because the resin is filled with excessive calcium carbonate. Before calcium carbonate is made into granules, surface activation treatment should be carried out with materials such as coupling agent, dispersant and lubricant. Excessive calcium carbonate content in the resin will produce peculiar smell. Moreover, some substances will remain in the product, and will be released at a higher temperature, which will be harmful to consumers' health.