Both sterilized and non-sterilized masks are also made in a 100,000-class dust-free workshop. Other indicators such as filtration efficiency or airflow resistance are the same. The difference is that the final sterilization process of the finished product no.
What Is A Sterilization Mask?
The sterilization type is used in a sterile operating room. In order to prevent surgical infections, the requirements for microbial residues in masks are higher. It must be sterilized with ethylene oxide to achieve this effect.
Ethylene oxide is flammable, explosive and carcinogenic, and is a respiratory protection. It must have a resolver for 7-14 days after EO sterilization until the amount of ethylene oxide remains below 10ug / g.
What is ethylene oxide? How is it sterilized?
Active ingredients of sterilization gas
The sterilization gas is composed of ethylene oxide (C2H4O, also known as “EO”) as the active ingredient, mixed with carbon dioxide. Because pure ethylene oxide is flammable and explosive, it has a wide explosion limit. By mixing inert gas carbon dioxide, the explosion limit can be changed, reducing the explosion risk and improving the safety of use. The specific gravity and molecular weight of carbon dioxide are relatively similar to those of ethylene oxide, so a mixture of 30% ethylene oxide is commonly used for sterilization.
Principle of sterilization of ethylene oxide (C2H4O)
Non-specific alkylation of ethylene oxide (C2H4O) with the protein molecules of microorganisms causes the protein to lose reactive groups, impeding the normal biochemical reaction and metabolism of the protein, resulting in the death of the microorganism, thereby achieving the sterilization effect. Ethylene oxide can kill a variety of microorganisms, including bacterial propagules, spores, viruses and fungal spores. Ethylene oxide is an alkylating agent with strong penetrating power, can use various packaging materials and can be sterilized in the packaging state. Therefore, most items that are not suitable for sterilization by general methods can be sterilized and sterilized with ethylene oxide. It is one of the most important low-temperature sterilization methods.
Sterilization process of ethylene oxide (C2H4O)
Because ethylene oxide is flammable, explosive, and toxic to humans, it must be carried out in a closed ethylene oxide sterilization cabinet.
The ethylene oxide sterilization cabinet includes a leak-proof and explosion-proof steel chamber, which is firstly temperature-adjusted through a heating (pretreatment) process, then evacuated, and then humidified by a humidifier to achieve sterilization conditions before being introduced Sterilized gas that has been preheated and has been vaporized. The temperature, humidity, concentration, time, pressure, and packaging method in the sterilization cabinet are all important factors that affect the sterilization effect. The sterilization effect is usually controlled using biological indicators.
Application of sterilization gas
Sterilized gas is widely used in the production of medical hygiene materials (masks, pads, etc.), disposable medical devices (catheters, syringes, endoscopes, pacemakers, etc.) and hollow capsules.
After the masks are finished, they are sealed and put in a packaging carton. The whole carton is put into a sterilization cabinet for sterilization. Ethylene oxide has a strong penetrating power, can penetrate boxes and plastic packaging, and penetrates into products for sterilization.
Although not all masks are sterilized, medical treatments must be sterilized.
Validity of sterilization gas
Unlike other gases, the “life” of sterilized gas is shorter, which requires production plants to use higher technology and management methods to ensure the stability of sterilized gas and extend its validity. Cylinder processing technology, filling process operation, instrument analysis and quality monitoring, the rigorous control of each link, determine the quality, stability and validity of the sterilized gas produced.
Of course, as a manufacturer of ethylene oxide sterilization gas, due to the toxicity and flammable and explosive nature of ethylene oxide, its filling, storage, and operation all require special filling and operation qualification licenses, and relevant departments There are strict requirements and controls on the issuance of these qualification permits. Therefore, when choosing sterilized gas, you must remember these key points.
What Is A Non-Sterile Mask?
Non-sterile masks are also managed strictly in accordance with medical device management methods, which is safe enough to meet the daily public protection needs.
Non-sterile masks are ordinary dust masks, which are generally not effective in isolating bacteria and viruses. They are only suitable for general smog days, dust and wind protection.
Why Is There A Sterilization Type?
The main reason is that the things that need to be entered in medical places such as ICU and operating room that require strict control of the microbial environment are sterile, so as not to cause other bacterial infections of the patient.
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