Commonly used materials and characteristics for child-proof bottle opening

The child-resistant bottle packaging uses polypropylene dishes as the main raw material. Polypropylene is a polymer, which is a typical stereoregular polymer. Its properties are not only affected by relative molecular mass and relative molecular mass distribution, but also by its regularity.

At present, most of the industrial production is isotactic polypropylene, its air permeability and perspective rate are lower than polyethylene, and its water absorption is also very small (<0.02%), and it is light and cheap, non-toxic and tasteless. Pharmaceutical packaging materials. PP health product packaging bottles are resistant to various chemicals, including strong acids, strong alkalis and most organic substances, resistant to 121°C high temperature steam sterilization and ethylene oxide sterilization, not suitable for dry heat sterilization and radiation sterilization bacteria.

Due to the high mechanical strength, stress cracking is not easy to occur. The main disadvantage of polypropylene (PP) is that it has poor low temperature resistance and becomes brittle at -20 degrees. It is widely used as containers and other pharmaceutical packaging materials. When the container wall is thick, polypropylene products are milky white and opaque.