PP packing box is a kind of packing box made of PP material. It can be divided into glossy PP packing box, matte PP packing box, transparent PP packing box, and solid PP packing box.

The characteristics of the material pp of the PP box:

1. Crystal material, low hygroscopicity, prone to melt rupture, easy to decompose after long-term contact with hot metal.

2, good fluidity, but the shrinkage range and shrinkage value is large, easy to shrink holes, dents, deformation.

3. The cooling rate is fast. The pouring system and cooling system should dissipate heat slowly, and pay attention to controlling the molding temperature, the material temperature is easy to be oriented at low temperature and high pressure. When the mold temperature is lower than 50 degrees, the plastic part is not smooth, and it is easy to produce poor welding and flow marks. Above 90 degrees, warping deformation is easy to occur.

4. Plastic wall thickness must be uniform to avoid lack of glue and sharp corners to prevent stress concentration.