1. The wall thickness of the plastic bottle is uniform, the part where consumers pay the most attention. The printed surface should be smooth and continuous; if the liquid plastic bottle contains handles, grooves, ribs and other structures
2. The printing surface of the plastic bottle should be designed so as not to cause inconvenience to the printing operation. The label surface should be flat. A "frame" can be designed on the surface of the plastic bottle to make the label position accurately
3. When using labels on the exterior of the plastic bottle, no movement occurs, such as the middle of the plastic bottle is relatively thin
4. Changing the outer shape of the plastic bottle and increasing the circumferential groove or rib on the outer surface of the plastic bottle can improve the rigidity and bending resistance of the plastic bottle. The longitudinal grooves or ribs can eliminate the deviation, sagging or deformation of the plastic bottle under temporary load.
5. When designing squeeze plastic bottles, the cross-section of the plastic bottle should be rectangular or oval. For low-density polyethylene or other flexible plastic bottles, the cross-section should be round, so that the content can be easily removed from the plastic. Squeeze out of the bottle.
6. When blow molding, always tend to harden first. Therefore, the wall thickness of this part is also larger. The wall thickness of the edge and corner part, the part where the parison is last in contact with inflation, is smaller. Therefore, the edges and corners of the plastic bottle should be designed with rounded corners.