Mask Particulate Filtration Efficiency Tester Test principle: The aerosol generator converts the 2% sodium chloride solution into particles with a concentration of 30mg/m³ and a diameter of 0.075μm. According to different standards, the particles are transported into the closed cavity by adjusting different air flows. The test starts when the concentration of the upper cavity and the lower cavity of the cavity reach equilibrium, because particles will continuously enter the cavity, so when the filter material is filtered, the concentration of the lower cavity will decrease, and the concentration of the upper cavity will remain at equilibrium status. Therefore, the computer will calculate the filtration efficiency according to the concentration difference between the upper and lower chambers. Filtration efficiency index role Filtration efficiency is to determine whether the filter material of a mask has the function of filtering particles and bacteria; the higher the filtration efficiency, the better the protective effect of the mask. GESTER Mask Tester recommendation: Automatic Particulate Filter Efficiency PFE Tester GT-RA09

Mask BFE tester Test principle: Firstly, a special microbial aerosol generator is used to provide a certain concentration of microbial aerosol for the entire system, and then the microbe and the diluted air are mixed evenly through the mixing and dilution section of the instrument.Then use a stable filtration rate to send a single, moderately stable and stable microbial aerosol into the sampler, and finally the sampler samples the filter material upstream and downstream, and calculates the microbial concentration in the sampled air by calculation to obtain the converted filter material The filtration efficiency of bacteria. Bacterial filtration efficiency index function: Bacterial filtration efficiency is one of the important indicators for testing the protective effect of masks, and represents the efficiency of masks in blocking bacteria from passing through the filter material of the mask. The higher the bacterial filtration efficiency of the mask, the better the protective effect. The bacterial filtration efficiency of medical masks must be 95% to be qualified. GESTER Mask Testing Machine recommendation: Mask Bacterial Filtration Efficiency (BFE) Tester GT-RA02 Mask Bacterial Filtration Efficiency (BFE) Detector GT-RA02B

When a mask is accidentally exposed to flame, its flame retardant performance is directly related to the safety of medical personnel. Therefore, the flame retardancy of the mask is one of the important physical indicators to measure the quality of medical masks. It is related to the material of the mask fabric itself on the one hand, and the flame retardant treatment effect on the surface of the fabric on the other. The following commonly used mask standards all stipulate the combustion performance: GB 19083-2010, YY 0469 stipulates: the mask material should be made of non-flammable materials, and the mask burns for no more than 5s after leaving the flame. GB 2626 stipulates: if the product design is not flame retardant, it is necessary to provide explanatory information. If the product design is flame retardant, each part exposed to the flame will continue to burn for no more than 5s after the flame leaves. Medical Face Mask Flame Resistance test: Using a metal head mold and a burner, the mask wearer was simulated to pass through a high-temperature flame, and the flame retardant effect of the mask was detected. Testing instrument: Mask Flame Retardant Tester GT-RA06

Advantages of ultraviolet disinfection technology: The disinfection effect of ultraviolet disinfection technology on bacteria, viruses and other pathogens has been recognized worldwide, and it has unmatched sterilization efficiency of other technologies. The bactericidal effect of ultraviolet rays on bacteria and viruses is generally within one second. For traditional chlorine and ozone methods, it usually takes 20 to 50 minutes to reach the sterilization effect of ultraviolet rays. uv sterilization machine has high efficiency sterilization and broad spectrum, no secondary pollution, safe and reasonable design, safe and reliable operation. The operation and maintenance are simple and the cost is low. This Face Mask UV Sterilization Machine occupies a small area without noise. Continuous mass sterilization. There are many advantages such as wide application fields. Maintenance of ultraviolet sterilization machine: 1 Regular inspection to ensure the normal operation of the UV lamp. 2. After continuous use for 8000 hours or one year, the UV lamp should be replaced. When replacing a new lamp, first unplug the lamp power socket and take out the ultraviolet lamp. Be careful not to touch the quartz glass of the new lamp with your fingers, because the stain will affect the intensity of the light, and at the same time carefully put the lamp into the interior of the sterilizer.

The method for testing the waterproof performance of fabrics mainly includes hydrostatic head test method: one side of the fabric is subjected to hydrostatic pressure. When the hydrostatic pressure is gradually increased, and the other fabric is exuded, the water column height of the hydrostatic water indicates the water permeability of the fabric. Sex. This method is mainly to test the water permeability of the fabric. To measure the water permeability or water repellency of a fabric, it is necessary to measure its water repellency or water conductivity. Different methods are used depending on the actual use of the fabric, and the water permeability or water repellency of the fabric is indicated by various corresponding indexes. hydrostatic head test method (fabric hydrostatic pressure tester) Hydrostatic pressure refers to the ability of the fabric to seep under a certain water pressure. It is suitable for all kinds of fabrics, including those that have been waterproofed. The water repellency of the fabric is related to the water resistance of the fibers, yarns and fabric structures. The results are not the same as water spray and rain on the fabric surface. The water repellency of the fabric was measured by hydrostatic pressure method, and there were static pressure method and dynamic pressure method. The hydrostatic method is to apply hydrostatic pressure on one side of the fabric, and measure the amount of water discharged under this hydrostatic pressure, the time of water drop, and the value of hydrostatic pressure at a certain amount of water. The hydrostatic pressure can be the height of the water column or the pressure. In the actual measurement, a per unit area and a permeation amount (mL / cm2 · h) per unit time are used. For waterproof fabrics, measure the time required for water droplets to appear on the other side of the sample, or observe the number of water droplets that appear on the other side after a certain period of time. The principle of the dynamic pressure method is the same as the static pressure method, except that P is a variable. It is to apply a constant pressure of water pressure P on one side of the sample until the other side is penetrated by water to show a certain number of water drops, the imposed water pressure P. This method is more suitable for coated fabrics or tightly structured fabrics. Hydrostatic pressure is used to reflect the waterproof performance of fabrics. Fabrics with large hydrostatic pressure are highly waterproof, and fabrics with small hydrostatic pressure are weak. Water-repellent fabrics have a strong moisture absorption capacity. They are wet when exposed to water, have no water resistance, and do not produce hydrostatic pressure. In the AATCC 127-2003 test method experiment, take at least three samples with a size and area of 200mm × 200mm along the diagonal direction of the sample to be tested. The water resistance of the two sides of the sample is different. Make a mark and test with (21...

Mask Bacterial Filtration Efficiency Test For the testing of medical protective clothing, medical protective masks, and medical surgical masks, to verify the barrier performance of airborne particulates, small non-oily particles with a certain airflow are passed through the medical protective articles to test their filtering efficiency. Protective Clothing Blood Penetration Resistance Test For the testing of medical protective clothing, the simulated blood is squeezed for a long time to check whether the blood penetrates from the medical protective clothing. Water resistance test According to the detection of medical protective clothing, water pressure test is carried out on the medical protective clothing at a certain pressure boosting speed to check whether there is water seepage in the medical protective clothing. Flame retardant test For the detection of medical protective clothing, the sample of medical protective clothing is burned on a flame, and the length of time of burning and the length of burning are detected to judge the flame retardancy. Antistatic test The test for medical protective clothing is to detect the harm caused by static electricity caused by friction of protective clothing, such as adsorption of harmful dust. Put the treated protective clothing into a friction machine to charge it with friction, and read the protective clothing's charge to determine.

Mask synthetic blood penetration test For the detection of medical surgical masks and medical protective masks, simulate the rapid blood spray to the outside of the masks, and observe the permeability of blood to the masks. Tightness test For the detection of medical protective masks, a total of 10 subjects, 5 men and 5 women, were selected to simulate the use of medical staff. Air leakage performance after matching the mask with the face. Mask Flame Retardant Test For the detection of medical protective masks and medical surgical masks, metal head molds and burners are used to simulate the situation where the mask wearer passes in a high-temperature flame to detect the flame retardant effect of the mask. Tensile test For the detection of medical protective clothing, the cut protective clothing materials were stretched at the specified speed until breaking through the tensile testing machine to test the strength of the key parts of the protective clothing. Mask Differential Pressure Test Aiming at the detection of medical surgical masks and disposable medical masks, to verify whether wearing a mask will make it difficult to breathe, test the ventilation resistance of the mask, and determine the pressure difference between the two sides of the mask. Mask Bacterial Filtration Efficiency Test For the testing of medical protective clothing, medical protective masks, and medical surgical masks, to verify the barrier performance of airborne particulates, small non-oily particles with a certain airflow are passed through the medical protective articles to test their filtering efficiency.

Definition of medical protective clothing: Medical protective clothing refers to protective clothing used by medical personnel (doctors, nurses, public health personnel, etc.) to enter specific medical and health areas (such as patients, hospital visitors, personnel entering infected areas, etc.), and its role is to isolate Germs, harmful ultra-fine dust, acid and alkali solutions, electromagnetic radiation, etc., ensure the safety of personnel and keep the environment clean. Classification of medical protective clothing 1. According to use and occasion: ①. Daily work clothes refer to white coats, also called white coats, worn by medical staff in their daily work. ②. Surgical clothes are specially designed clothes worn in the operating room. ③. Isolation clothing refers to clothing worn by medical personnel when they are in contact with patients, family members, etc. to visit patients. ④. Protective clothing refers to the clothing worn by persons in medical emergency, special areas such as infectious disease areas, and electromagnetic radiation areas. 2. According to the service life: Disposable and reusable protective clothing. 3. According to the materials: Woven and non-woven protective clothing. Requirements for the manufacture of medical protective clothing The production of medical protective clothing mainly uses machines such as lockstitch sewing machines, overlock sewing machines and glue presses. The nonwovens that meet the protection requirements are cut, stitched, elasticized, and glued. "Resistant primary antibody" (water, blood, alcohol, antistatic) functional finishing, made into a medical protective clothing containing a hooded top and pants. Protective clothing is required to be dry, clean, and free from mildew. The surface must not have defects such as adhesion, cracks, holes, etc. Medical disposable protective clothing and reusable protective clothing should meet the standards: YY, GB, ISO, ASTM, JIS / T, EN, DIN etc. Test items Medical protective clothing testing items Appearance quality inspection Structure, model and specification determination Liquid barrier properties: anti - seepage, drenching capacity, anti - synthetic blood penetration Surface moisture resistance Breaking strength, elongation at break, filtration efficiency Flame retardant performance Antistatic performance Static decay performance Skin irritation Microbiological indicators: total number of bacterial colonies, coliforms, Pseudomonas aeruginosa, Staphylococcus aureus, Streptococcus hemolyticus, total number of fungal colonies Ethylene oxide residue The key indicators of medical protective clothing testing are liquid barrier properties, which mainly include indicators such as impermeability to water, moisture penetration, resistance to penetration by synthetic blood, and water level. Measurement of breaking strength and elongation at break, measurement of filtration efficiency, analysis of flame retardancy, analysis of antistatic performance, etc. GESTER I...