Application of medical plastic bottles

Medical plastic bottles should be controlled to a certain extent and designed reasonably, have good performance and functions, and can fully reflect the important value of the industry. 500 ml of oral solution.


1. When designing extruded medical plastic bottles, if the material used is high-density polyethylene or polypropylene, the cross-section of the plastic bottle should be rectangular or oval. For low-density polyethylene or other soft plastic bottles, the cross-sectional part should be round. It is convenient to squeeze the contents of the plastic bottle. The plastic part is matched with the plastic bottle mouth, mainly with cap and seal. When designing plastic bottles, we should emphatically consider how to make the mouth of the plastic bottle match the cap and the cap, which is the weak point of the mechanical properties of the plastic bottle. Therefore, the bottom of medical plastic bottles is usually designed to be concave, and the corners and concave corners of the plastic bottle are relatively large. In order to facilitate the stacking of plastic bottles and increase the stacking stability of plastic bottles, a groove should be provided at the bottom of the bottle.


2. Mark the surface of the medicinal plastic bottle, and the marking surface should be flat. The surface of the plastic bottle can be designed with a frame, so that the label is positioned accurately and does not move. In blow molding, the first part that the parison touches always hardens first. Therefore, the wall thickness of this part is also relatively large. The corners and corners are the contact parts of the slab expansion, and the wall thickness is very small. Therefore, the edges and wipers of the plastic bottle should be designed with rounded corners. By changing the surface shape of the plastic bottle, for example, the middle part of the plastic bottle is relatively thin, and the circumference or ribs are added to the surface of the plastic bottle, which can improve the rigidity and bending resistance of the bottle body. Under long-term load, the longitudinal grooves or reinforcing ribs can eliminate the displacement of the plastic bottle, reduce or deform.

3. The sharp corners, thread roots, necks and other parts of medical plastic bottles, because most plastics are recessed, so these parts should be designed with rounded corners. The revolving mouth of the rectangular plastic bottle needs to bear most of the load of the plastic bottle, so locally increasing the wall thickness is beneficial to improve the rigidity and load strength of the bottle body.


4. The printed matter of medical plastic bottles has received great attention from consumers. The surface of the plastic bottle should be uniform and continuous. For example, there are handles, notches, steel bars and other structures in the plastic bottle. When designing, it should be careful not to cause inconvenience to the printing operation. The rigidity of the plastic bottle is high, but the mold manufacturing cost is high. For this reason, in addition to selecting high-rigidity materials, the shape of the plastic bottle should also be designed to ensure the rigidity and load-resistant strength of the plastic bottle.