Four problems in the production of plastic bottles(2)

(3) The printed surface of the plastic bottle is the most concentrated part of the consumer's attention. The printing surface should be flat and continuous; if the plastic bottle contains handles, grooves, ribs and other structures, care should be taken not to inconvenience the printing operation. Elliptical plastic bottles have higher stiffness, but the manufacturing cost of the mold is higher. Therefore, in order to ensure the rigidity of the plastic bottle, in addition to selecting a material with high rigidity, the shape of the plastic bottle is also designed to enhance the rigidity and load resistance of the plastic bottle.

(4) Since most plastics have notch sensitivity, plastic bottles are prone to cracks and cracks at sharp corners, roots of the mouth threads, necks, etc., so these parts should be designed to be rounded. For the transfer of rectangular plastic bottles, it is necessary to support most of the load of the plastic bottle, so locally increasing the wall thickness at this place is also beneficial to increase the rigidity and load resistance of the plastic bottle.