The shape of the **plastic bottle** should be symmetrical to ensure even distribution of material and structural integrity. Avoid sharp angles or extreme stretching points, as these can weaken the bottle and affect its performance. Instead, use smooth arc transitions at all corners and edges to improve aesthetics and functionality.
1. Ensure the wall thickness of the plastic bottle is uniform throughout. Uneven thickness can lead to weak spots, making the bottle more prone to cracking or deformation.
2. The printed surface of the plastic bottle should be flat and continuous for optimal visual appeal. If the bottle has handles, grooves, or ribs, make sure they do not interfere with the printing process or cause distortion on the label area.
3. The label area must remain flat and free of irregularities. A "frame" can be added around the exterior of the bottle to help position the label accurately during the labeling process.
4. When designing the appearance of the plastic bottle, avoid features that could cause misalignment or shifting. If the middle part of the bottle is thin, consider reinforcing it with circumferential grooves or ribs to increase rigidity and prevent bending or sagging under pressure.
5. Modify the shape of the plastic bottle if necessary. Adding circumferential grooves or ribs on the outer surface enhances strength and resistance to deformation. Longitudinal grooves or ribs can also help prevent sagging or warping when the bottle is under temporary load.
6. When using high-density polyethylene (HDPE) or polypropylene (PP), design the cross-section of the bottle to be rectangular or elliptical. For low-density polyethylene (LDPE) or other flexible materials, a round cross-section is preferable, as it makes it easier to extrude the contents from the bottle.
7. During blow molding, the first area to inflate tends to harden faster, resulting in thicker walls in that region. At the edges and corners, where the parison finally comes into contact, the wall thickness is thinner. To avoid stress points and potential breakage, round off all edges and corners of the bottle.
By following these design principles, you can create a durable, visually appealing, and functionally efficient plastic bottle that meets both aesthetic and practical requirements.
Jiuzhi Plastics Network
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