Medical bottles need to ensure that the plastic bottles have good non-pollution and cleanliness, and show good use value in use.
When the surface is labelled, the label surface should be flat. A "sash" can be designed on the surface of the plastic bottle so that the tag can be accurately positioned without movement. During blow molding, the part where the preform inflates first contacts always tends to harden in advance. Therefore, the wall thickness of this part is also larger. The edges and corners are the parts where the parison is inflated last, and the wall thickness is smaller. Therefore, the edge of the plastic bottle and the corner should be rounded. Changing the surface shape of the plastic bottle, such as a relatively small central portion of the plastic bottle, increases the circumferential groove or rib on the surface of the plastic bottle, which can improve the rigidity and bending resistance of the plastic bottle. Longitudinal grooves or ribs eliminate plastic bottle deflection, sagging or deformation under long-term loading.
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