Face Mask Tester || qinsun-lab

What are the common raw materials used for medical protective clothing? 1. Polypropylene fabric The material can be antibacterial, antistatic treatment, but its hydrostatic pressure resistance is relatively low, blocking the efficiency of virus particles is poor, can only be used as sterile surgical gowns, disinfection bag cloth and other general protective supplies. 2. New polyester fiber   It is similar to traditional textiles that can be treated with anti-static, anti-bacterial, anti-static, etc., but its hydrostatic pressure resistance is relatively low and the efficiency of blocking virus particles is low.   3. Polymer coated fabrics  There are many kinds of protective fabric coatings, such as PVC, polyethylene, etc.. This kind of protective clothing is waterproof, good anti-bacterial performance, can be reused, but poor moisture permeability and uncomfortable. High-end laminated fabrics are PTFE, super waterproof and moisture permeable composite fabrics.

What is the material of medical protective clothing and how is it tested? What is the purpose of protective clothing? How is medical protective clothing made? Common medical protective clothing is usually a one-piece structure consisting of a cap, top and pants, and has strict standards in production, including protection (sealability), usability and safety and hygiene. Medical protective clothing can be made by cutting, sewing, elasticizing, and gluing and pressing strips, and the machines involved are inseparable from these three: flat sewing, overlocking, and gluing. Although it is a "basic staff", its role is not to be underestimated. The tightness of the thread and the fineness of the stitching are all related to the final effect presented. It can meet the process of sewing, zipping, velcro and elasticity in protective clothing. Medical protective clothing is usually designed with a closed lapel, which means that the internal zipper is closed, the external bonded lapel i...

Mask tightness test: is a quick breath enough? 1. Definition of tightness.  If the fit of the mask is poor, it will not help even if it has KN99 filtration efficiency. The outside air can enter directly from the poorly fitted periphery without passing through the mask filter material, so the good or bad fit directly affects the safety of the user.   2. Technical requirements of tightness If the fit of the mask is poor, it will not help even if it has KN99 filtration efficiency. The outside air can enter directly from the poorly fitted periphery without passing through the mask filter material, so the good or bad fit directly affects the safety of the user.   3. Technical requirements of tightness Through the fit test penetration, we can check how well it fits and whether it can be fitted to the face after wearing it. As a hospital inductor, when we train or evaluate medical staff to wear masks, we will ask them to cover the mask with their hands after wearing the mask and...

The most complete interview summary: how should N95 masks be tested?  As the "new crown epidemic" slowly dissipates, major enterprises are beginning to resume normal operations. Because of the loss of many staff caused by the epidemic, companies also ..... The material and taste of the mask are non-toxic and will not cause adverse reactions; Whether the earband mask will strangle the skin when worn for a long time. Consider from the aspect of ease of use The inside and outside of the mask, the top and bottom are easy to distinguish and easy to wear; The upper edge of the mask is easy to press the nose clip, easy to fit tightly on the face; The mask is easy to fold, easy to carry. The overall idea as above analysis, of course, the interviewer will certainly not ask you to cover every point, after all, the interview is so short time can not think of such a full test points. So the focus is on testing ideas: the main focus on functionality (from positive + negative coverage), an...

N95 Face Mask test apparatus of 3 test methods 3 testing methods of N95 Face Mask testing instrument : 1、After closing the fixed volume chamber with the gas-tight inspection cover, the system is pumped to 1180Pa negative pressure state, and no pressure change should be observed within 2min after closing the control valve. 2, the sample to be tested is mounted on the fixed volume chamber, and ensure a tight fit, the pumping rate of not more than 500mL/min to make the system to 1250Pa negative pressure state, close the control valve. 3, from the negative pressure of the system down to 1180Pa, start timing, record the time required to return the system to normal pressure is less than 20S exhalation valve cover test method: use the appropriate fixture to fix the exhalation valve cover and mask hood of the sample under test, respectively (the fixing point should be reasonably close to the corresponding connection parts). Start the material testing machine, apply tensile force and record wh...