Details to be paid attention to in the process of plastic bottle design and labeling
1) when designing extruded plastic bottles, if the material is high-density polyethylene or polypropylene, the cross section of the plastic bottle should be rectangular or oval, and for low-density polyethylene or other flexible plastic bottles, the cross section should be circular. This facilitates the extrusion of contents from the plastic bottle. The plastic parts used with the plastic bottle mouth are mainly bottle caps and sealers. The design of plastic bottle mouth should focus on examination; Considering how to make the plastic bottle mouth better match with the cap and sealer, the bottom of the plastic bottle is the weak part of the mechanical properties of the plastic bottle. Therefore, the bottom of the plastic bottle is generally designed to be concave; At the corner of the plastic bottle, the phase 1 project of Guotai Xinhua coal based fine chemical circular economy industrial park is located in Xinjiang Zhundong economic and Technological Development Zone, and the concave part has a large arc transition. In order to facilitate the stacking of plastic bottles and increase the stacking stability of plastic bottles, inner grooves should be designed under the blue sky of "realizing enterprise value at the bottom of plastic bottles"
2) when labeling is used on the surface of plastic bottles, the labeling surface should be flat. A frame can be designed on the surface of the plastic bottle, so that the label can be accurately positioned without moving. During blow molding, the first contact part of parison expansion always tends to harden first. Therefore, the wall thickness of this part is also larger. The edge and corner are the last contact part of parison inflation, and the wall thickness of this part is small. Therefore, the edges and corners of plastic bottles should be designed into rounded corners. Changing the surface shape of the plastic bottle, such as the middle part of the plastic bottle is relatively thinner, and increasing the circumferential grooves or ribs on the surface of the plastic bottle can improve the rigidity and bending resistance of the plastic bottle. Longitudinal grooves or stiffeners can eliminate the offset, sag or deformation of plastic bottles under long-term load
3) the printing surface of plastic bottles is the most concentrated part of consumers' attention. The printing surface should be flat and continuous; If the plastic bottle contains handles, grooves, stiffeners and other structures, attention should be paid to not causing inconvenience to the printing operation during the design. Oval plastic bottle has high rigidity, but the manufacturing cost of the mold is high. Therefore, in order to ensure the rigidity of plastic bottles, in addition to selecting materials with high rigidity, we should also enhance the rigidity and load-bearing strength of plastic bottles through the shape design of plastic bottles
4) because most of the plastic can be directly obtained, the plastic has notch sensitivity, and the plastic bottle is prone to cracks and cracks at the sharp corners, the root of the mouth thread, the neck and other parts, so these parts should be designed as rounded corners. For the transfer part of the rectangular plastic bottle, it is necessary to support most of the load of the plastic bottle, so increasing the wall thickness locally and strengthening the screws are also conducive to improving the stiffness and load-bearing strength of the plastic bottle