With the popularization of paper-plastic packaging bags for disinfection and sterilization, various problems of paper-plastic packaging bags have begun to appear. The common problem is the air leakage of paper-plastic packaging bags. Air leakage of paper-plastic packaging means that bacteria are isolated. The function failure also means the failure of the preservation of the sterilized items. Therefore, how to effectively identify whether the sterilized paper-plastic packaging bag is leaking is very important. At the same time, in the process of clinical use, we often find that the sterilized items collapse when they are pinched during the preservation process. It gives people the feeling that their airtightness has been destroyed. Is this kind of packaging bags really not ventilated? Is it really unusable to deflate in one pinch?
The paper-plastic packaging uses breathable paper, so it is indeed ventilated, but it can block microorganisms. This is in line with the assumption of Shiqiao Moderator Article 2. At present, our technology can meet this requirement, but this ventilation is consistent with our usual understanding. It’s a bit different, for the following reasons:
1. The pore size of the air-permeable paper used in paper-plastic packaging is generally 0.4um, which can be air-permeable, but it cannot be felt by hand.
2. The scenario assumed by the Shiqiao moderator: Due to the small diameter of the scalp needle, different models are roughly between 200-600um, but it is significantly larger than the normal pore size of the breathable paper, and it is also significantly larger than the size of ordinary microorganisms. It has the function of isolating microorganisms. It has indeed been destroyed.
3. However, the air flows in the 200-600um aperture, and we still can't feel obvious air leakage by pinching it with our hands.
4. Therefore, there is currently no simple clinical identification method for the inspection after the packaging barrier destroyed by the pinhole.
5. If the inspection is for inspection, some other methods can be used. For example, the instrument method can use a leak strength tester, and the experimental method can use the dye liquid penetration observation method. The latter is used by immersing the pierced package sample in the dye solution for observation, and the pinhole will show a darker spot. But these methods are not suitable for clinical examination.
