Professional protective mask
Application and classification
Particulate protection mask
The purpose of the particle respirator is to protect all types of particulate air pollutants suspended in the air and provide respiratory protection for the wearer. Particulate matter respirator is the most widely used professional respirator
In addition to the use in traditional industrial and engineering construction, it is also widely used in agriculture, scientific research and teaching, and can protect various types of mine dust, coal dust, silicon dust, foundry smoke, welding smoke, medicine dust, grain dust, oil mist, Acid mist and radioactive aerosols and biological aerosols can also be used for the protection of various airborne pathogenic microorganisms, such as Mycobacterium tuberculosis or SARS virus.
Figure 3. Particulate protection masks in various styles and functions
At home and abroad, compulsory product certification standards have been established for particulate protective masks, such as GB2626-2006 in China, 42CFR 84 in the United States, and EN 149-2001 in the European Community, etc. [[3-4]]. Because the standards have different requirements for the protection level of the product, in order to facilitate user selection and government supervision, these standards require a clear identification of the protection or filtration efficiency level on the surface of the mask and the packaging, and provide product certification. Information for easy verification. The standard will pass two of the most critical technical indicators, namely the filtration efficiency of particulate matter (reflected in the filter material of the mask) and the tightness between the mask and the wearer's face (reflected in the reliability of the design structure and fixing method of the mask To standardize the basic safety protection performance of protective masks; the standard will also limit breathing resistance to avoid excessive resistance that will adversely affect the user's health.
Medical surgical mask
Surgical masks are medical masks worn by medical personnel during invasive procedures to provide protection to patients undergoing treatment and medical personnel performing invasive procedures to prevent the spread of blood, body fluids and splashes. Existing medical device management system in China.
Medical surgical masks are Class II medical devices. Manufacturers should have medical device production licenses. Products should have medical device product registration certificates. They must comply with the pharmaceutical industry standard YY0469-2004. Be clear.
It can be considered that the use of medical surgical masks was developed on the basis of the application of the masks invented by Paul Berger, which is not only used to protect patients during surgery, but also increases some protective effects for medical staff. The YY0469-2004 standard reflects the barrier effect of masks on the droplets generated by the mask wearer by specifying the size of the mask and the filtering efficiency of the mask on large particles of bacteria (bacterial filtration efficiency). It is sprayed with synthetic blood with a certain pressure. The test evaluates the effect of the mask on blocking the transient penetration of body fluids and causing infection.
Medical protective mask
Figure 5 Medical protective masks worn by medical staff
The first version of GB19083 was made urgently during the SARS outbreak in 2003, and the old version was revised in 2010. GB19083 has clear requirements for the filtering efficiency and tightness of masks. This point is similar to GB2626-2006. Medical protective masks are also surgical masks. Therefore, it is not allowed to set an exhalation valve to avoid droplets generated by the wearer Exhalation valve discharges contaminated surgical wounds;
On the surface, disposable and medical surgical masks are difficult to distinguish. The disposable masks in the hospital belong to Class I medical devices. The products have medical product registration certificates. The pharmaceutical industry has no standards for such products. Manufacturers only produce according to corporate standards. Medical disposable masks do not have a protective function against body fluid splashes, and the filtering efficiency of droplets is uncertain, and they cannot be used for surgical operations.
Odor Reduction Mask
The two common products currently on the market are organic odor-reducing masks) and acid gas odor-reducing masks. Professional odor reduction masks are firstly particulate protective masks, which can be closely adhered to the face. A small amount of activated carbon adsorbent in the filter material can adsorb some low-concentration, harmless, but uncomfortable gaseous substances. It will have a certain effect on the odor from some putrid substances, or the unpleasant smell from some glue. Since this type of mask is only used in a harmless environment, there is no need to make specific requirements for the odor reduction effect with the standard. Depending on the subjective feeling of the wearer, the user can use some safe organic liquids (such as white vinegar, (High-purity acetic acid, or medical alcohol) to identify the effect of organic odor reduction.
The user should carefully read the instructions for use of the odor reduction mask to determine its applicability. Organic odor refers to odorous organic compounds volatilized from organic compounds that are liquid at normal temperature and pressure. The boiling point of such organic compounds is higher than room temperature. Therefore, masks with reduced organic odor are not suitable for formaldehyde. The boiling point of formaldehyde is -19ºC. Formalin is an aqueous formaldehyde solution, not liquid formaldehyde. Like methane, formaldehyde is also an organic gas. Ordinary activated carbon has no filtering effect on organic gases. Formaldehyde gas mask. When the concentration of gaseous pollutants in the environment with odors exceeds the health standard, odor reduction masks cannot be used, and gas masks should be used.