Tightness is a major function of pharmaceutical bottle caps, and it is also a very important test item in the quality standard of pharmaceutical packaging. If the sealability is not up to standard, the medicines in the package are easily polluted by the external environment or deteriorated by moisture, which endangers the health of patients. So, how does the lid ensure its tightness?
The sealing measures of medicinal bottle caps are mainly reflected in the sealing gaskets and sealing equipment. Generally, aluminum caps or plastic caps are mostly used for medicinal plastic bottles, and the matching gaskets include silicone gaskets and butyl gaskets. And aluminum foil gasket.
The silicone gasket has good chemical stability, pressure resistance, high temperature resistance, low temperature resistance, safety, environmental protection, no peculiar smell, insoluble in water and any solvents. It is a highly active green product, whether it is used in medicine or food grade. It is very safe and reliable. (2) Butyl gaskets: It is a type of gaskets that are more commonly used in the market, and butyl reclaimed rubber can replace butyl raw rubber to produce various medical sealing gaskets, reducing the cost of raw materials. (3) PE gasket has a single composition, non-toxic, tasteless, odorless, and has no independent bubbles. Good chemical stability, acid and alkali solvent resistance, using this gasket can increase the tightness of the bottle cap.
To enhance the sealing performance of pharmaceutical bottle caps, the above three types of gaskets are generally selected. In addition, to achieve good sealing performance, it is also necessary to control the size of the bottle cap and the mouth of the bottle. An interference fit between the two can ensure good drug storage.
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