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Gamma-resistant Formulation
Development background
As customers' RTU (gamma-sterilized) stability requirements for rubber stoppers are formed with a trend of average 25 kGy level, the needs for a formulation stronger against gamma irradiation to maintain physical properties have emerged.
The Needs for Gamma-Resistant Medical Rubber
Existing rubber products are aging by gamma rays. → Unsuitable as medical packaging materials.
Gamma-ray sterilization using gamma-resistant packaging rubber → Effectively sterilized.
Advantages of Gamma Sterilization
The sterilization is achieved while product deformation and component destruction are minimized.
The sterilization is possible even in the space between very narrow gaps while being sealed.
The sterilization time and cost are reduced.
Development of a gamma-resistant formulation
We have completed the development of gamma-resistant formulation that meet the above needs and advantages, and the results of the physical properties test are as follows.
Gamma-resistant formulation and existing formulation physical property comparation
Gamma-Resistant Formulation
Bromobutyl Rubber Formulation
Chlorobutyl Rubber Formulation
Change in tensile strength change according to gamma radiation dose (%)
Change in extreme elongation according to gamma radiation dose (%)
Change in internal tearing strength according to gamma radiation dose (%)
