Butyl rubber stoppers for medical use are typically manufactured using a process called extrusion. Here are the basic steps involved in this process:
Mixing: Raw materials such as butyl rubber, curing agents, and other additives are mixed together in a large mixer.
Extrusion: The mixed rubber is then fed into an extruder, which compresses and shapes the rubber into a continuous strip of the desired diameter.
Vulcanization: The extruded rubber strip is then cut into individual stopper blanks, which are loaded into a mold. The mold is heated and pressurized, causing the rubber to cure and bond together, forming a solid stopper.
Finishing: After vulcanization, the stoppers are removed from the mold and undergo a series of finishing steps, including trimming, washing, and sterilization.
During the manufacturing process, it is important to maintain strict quality control measures to ensure that the final product meets the required specifications for use in medical applications. This includes testing the physical properties of the rubber, checking for defects, and verifying the sterility of the finished stoppers.
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