Why is the surface of plastic placemats not smooth

       The uneven quality distribution of plastic placemats on the market, especially plastic placemats, is generally caused by the following reasons.
       1. The problem with the raw materials for plastic placemats is that some factories' recycled plastic particles may appear to have good whiteness, but their quality is not as good as some with poorer colors. This is mainly due to the addition of a large amount of bleach, which causes the surface of the plastic placemat to be uneven during production.
       2. The processing methods for plastic placemats are different. The raw materials need to be cleaned and heated, and some machines have uneven heating, resulting in poor natural flatness.

       3. The influence of the cutting head of the granulator, some granulators do not cut grains quickly, resulting in uneven surfaces
       4. Cooling speed: Plastic particles must be cooled quickly after forming, otherwise they are extremely prone to deformation. So it is necessary to cool down immediately in a relatively short period of time
       So in summary, the uneven surface of plastic placemats is mostly due to the raw materials, so we should try our best to find the reason.