The comparative test results of 45 medical disposable protective suit and isolation gowns are shown here _ performance

Original title: See the comparative test results of 45 medical disposable protective suit and isolation gowns here. Protective suit are generally only used in medical treatment, and ordinary consumers seldom know and buy such products. Since 2020, the novel coronavirus epidemic has been raging around the world, and China's anti-epidemic work has also won a decisive victory. With the normalization of epidemic prevention, many consumers will prepare their own protective suit for protection according to their needs, but there are many doubts when purchasing and using them. Are all medical disposable protective suit sealed with "rubber strips"? When there is no protective suit, Wear isolation gowns Yes No Can also effectively isolate the virus in a short time? In order to provide consumers with objective and detailed consumption information and guide consumers to choose protective suit commodities reasonably, Heilongjiang Consumer Association entrusted Tianfangbiao Testing and Certification Co., Ltd. to carry out comparative tests on 45 disposable medical protective suit and isolation clothing commodities (the results were only responsible for the samples). Basic information Source of the sample The comparative test samples were randomly purchased by the staff of Heilongjiang Consumer Association as ordinary consumers in medical supplies stores in Harbin and online shopping platforms including Tianmao, Jingdong, Suning and Vipshop. Among them, there were 27 samples of disposable medical protective suit and 18 samples of isolation gowns; 12 samples were purchased offline and 33 samples were purchased online. In order to compare the performance of medical protective suit with that of ordinary textile clothing, five ordinary textile coats were purchased in offline physical stores. Test basis and test items This comparative test is based on GB 19082-2009 "Technical Requirements for Medical Disposable protective suit" to test the breaking strength, elongation at break, surface moisture resistance, moisture permeability, antistatic property, anti-synthetic blood penetration, impermeability, filtration effi ciency and other items of medical disposable protective suit and isolation clothing products. The air permeability of the sample was tested according to GB/T 24218.15-2018 Textiles Test Methods for Nonwovens Part 15: Determination of Air Permeability (see Figure 1). Expand the full text Figure 1 Assessment Dimensions Disposable medical protective suit are quite different from isolation gowns in terms of performance, scope of application and standard requirements (see Table 1 for details). Table 1 Differences between Disposable medical protective suit and Isolation Gowns Explanation of terms 1. Filtration efficiency Filtration efficiency refers to the percentage of particulate matter in the air (solid, liquid or mixed solid and liquid particulate matter suspended in the air, such as microorganisms, dust, smoke and fog) filtered by protective suit. 2. Anti-synthetic blood penetration Anti-synthetic blood penetration refers to the simulation of blood for a long time to squeeze the medical protective suit to check whether the blood penetrates from the medical protective suit. 3. Surface moisture resistance Surface moisture resistance reflects the ability of water droplets to roll down the surface of the protective suit, and is evaluated by the water contact grade on the outer surface of the protective suit. The sample is sprayed with a certain amount of experimental water, and the appearance of the sample after the test is compared with the evaluation standard and the identification film to determine its water level. 4. Resistance to water penetration Aiming at the medical protective suit detection, the water pressure test is carried out on the medical protective suit at a certain boosting speed to check whether there is water seepage in the medical protective suit. 5. Moisture permeability Moisture permeability reflects the permeability of protective suit to water vapor. Simply speaking, it is to evaluate the ability of the protective suit to dredge the sweat vapor emitted by the human body. The greater the moisture permeability of the protective suit, the greater the problem of suffocation and difficult discharge of sweat can be greatly alleviated, which is more conducive to the comfort of consumers. Analysis of results ► Protective performance (particulate filtration efficiency, liquid barrier) Protective performance is the core function of medical protective suit, which mainly includes the filtering efficiency of protective suit to particulate matter in the air and the barrier to blood, body fluids and other secretions. The test results show that: The 27 types of disposable medical protective suit can effectively filter particles in the air, and the filtering efficiency is above 90%; the liquid barrier performance varies among individuals, but they all meet the standard requirements and have excellent performance. Among the 18 kinds of isolation clothing, only 4 kinds had filtration efficiency ≥ 70%,Medical Full Body Coverall, which met the standard requirements of disposable medical protective suit; 3 kinds of samples did not meet the standard requirements of water permeability and synthetic blood penetration resistance, and only the results of surface moisture resistance test had no significant difference with disposable medical protective suit. However, the average filtration efficiency of five ordinary textile coats is only 17%, which basically does not have protective performance. Two medical disposable protective suit with excellent protective performance. Two types of isolation clothing with excellent protective performance ► Durability (breaking strength, elongation at break) Durable products can avoid being torn, punctured and damaged by external forces, resulting in the spread of bacteria and viruses into the protective suit and weakening the protective effect. The test results show that: (1) that elongation at break of the common textile coat is between 38.5% and 192%, the elongation at break of the fabrics of the protective suit and the isolation clothing is between 36.5% and 210%, and the elongation at break among the three fabrics has no significant difference; (2) The breaking strength of ordinary textile outerwear is between 250 N and 448 N, while the maximum breaking strength of protective suit and isolation clothing is only 249 N, which can not meet the strength requirements of textile outerwear temporarily; Therefore, consumers should pay attention not to be too strong when wearing and taking off, and avoid contact with sharp objects, resulting in damage to protective suit. The following table shows 2 protective suit with excellent durability: 2 samples with excellent durability performance In this comparative test, the breaking strength of two disposable medical protective suit does not meet the standard requirements, and the fabric is easy to break during use or wearing and taking off, which increases the risk of virus infection: 2. The breaking strength does not meet the standard requirements ► Comfort performance (moisture permeability, air permeability) In order to enhance the protective effect, protective suit fabrics are usually laminated or coated, Medical Disposable Coverall ,Antivirus Disposable Mask with CE Certificate, which are thick and have poor air permeability and moisture permeability, which greatly increases the user's stuffy feeling when wearing, and long-term wear is not conducive to perspiration and heat discharge, affecting comfort performance. The national standard stipulates that the moisture permeability of medical disposable protective suit should be ≥ 2 500 G/ (m2 · d), but there is no requirement for air permeability. The better the moisture and air permeability, the more comfortable the protective suit. After testing, two medical disposable protective suit samples are below the standard requirements (see table below). By comparison, the moisture permeability of five kinds of ordinary textile leisure coats are all above the 10000 G/ (m2 · d), and only one kind of isolation coat sample reaches this value in this comparative test, but the four protective properties of this sample, including filtration efficiency, anti-synthetic blood penetration, surface moisture resistance and water permeability resistance, can not meet the standard requirements of medical disposable protective suit. Information of 2 samples whose moisture permeability does not meet the standard requirements The test results show that: Because of the good sealing and protection of medical disposable protective suit, there is still a certain gap between its moisture permeability, air permeability and isolation clothes and textile coats. See the following table for specific data: 3 samples with excellent comfort ► Safety performance (antistatic property) Safety is a consideration of the safety of the medical staff themselves, as well as the patient and the surrounding environment. Antistatic test is to detect the harm of static electricity caused by friction of protective suit, so as to prevent electrostatic adsorption of harmful dust and bacteria to patients and surrounding personnel. The test results show that: The measured antistatic property (charge) of four disposable medical protective suit samples is 0.8 μC/piece, which does not meet the standard requirements (standard requirements ≤ 0.6 μC/piece), and there are safety risks. Information of 4 samples whose antistatic properties do not meet the standard requirements In addition, the detection value of antistatic property (charge) of two samples is only 0. 1 μC/piece, and the antistatic property is better. Information of 2 samples with good antistatic property Comprehensive comparison The results of this comparative test show that the main items of medical disposable protective suit that do not meet the standard are breaking strength, antistatic property and moisture permeability, but their protective performance meets the standard requirements; The main items that do not meet the standard are filtration efficiency, indicating that isolation clothing does not have good protective performance, consumers should buy medical protective suit for epidemic prevention needs, and carefully choose isolation clothing products. Through the analysis of the above test items, considering the comprehensive score of the four aspects of protective effect, durability, comfort and safety performance, there are 2 protective suit with excellent performance (total score ≥ 4.5) and 4 with excellent performance (total score ≥ 4.25). (For detailed information, please refer to the attached Form of Comprehensive Evaluation of Disposable Medical protective suit) The protective effect of isolation clothing is relatively general, which can be used as a general protective suit. The isolation clothing is evaluated according to the standard of medical disposable protective suit. The information of the top 5 samples is shown in the following table: Explain 1. Overall evaluation weight: 40% for protection performance, 30% for durability performance, 20% for comfort performance and 10% for safety performance; 2. Calculation formula = protective effect 40% + durability 30% + comfort 20% + safety 10%; 3. Single item evaluation: 5 points excellent; 5 points > excellent ≥ 4 points; 4 points > good ≥ 3 points; 3 points > general ≥ 2 points; 4. The higher the score, the better the test result, and the samples with the same score are ranked in no particular order. Consumer tips Choose the appropriate protective clothing as needed The protective clothing that consumers often buy is divided into medical disposable protective suit and isolation clothing. According to the comparative test results, there is a big gap between the test results of various indicators of isolation clothing and the medical protective suit, and the protective effect of disposable medical protective suit is more guaranteed. During the epidemic period of new coronavirus, if you go to densely populated places, consumers had better choose disposable medical protective suit products to protect more effectively. Points for Attention in Purchasing protective suit. The connection parts of medical disposable protective suit are generally processed by needle sewing, bonding or heat sealing. Sewn products will be sealed at the needle eye, usually in the form of layering, consumers can first observe whether the purchased products have layering. The picture shows the common appearance of protective suit and isolation clothing. However, layering is not the only criterion for judging a product as a medical disposable protective suit, and consumers also need to identify and purchase it through the following points: ① Observe whether there are medical or medically applicable scenes and medical uses described on the product packaging; ② Check whether the standard implemented by the product is GB 19082-2009 Technical Requirements for Medical Disposable protective suit; ③ Whether the outer package of the product bears the words of medical device registration. As a Class II medical device, the medical disposable protective suit shall be put on record in the (food) drug supervision and administration department to see whether it has the production license number, product registration certificate number, product technical requirement number, etc; ④ On the basis of the above, check whether the product has the name and address of the manufacturer, the date of production, and whether the product certificate and instructions are attached. In addition, enterprises can be asked to show the test report of the batch of products and check the validity period. Choose the right size The medical disposable protective suit is divided into a one-piece structure and a split-body structure. Sizes are divided into 160/165/170/175/180/185, etc. Consumers should choose the appropriate clothing size according to their own figure. Wear and use steps ① Make preparations before wearing the protective suit; ② Open the protective suit, check whether it is damaged, and open the zipper; ③ Grasp the opening of the waist zipper of the protective suit while holding the one-piece cap and sleeve of the protective suit with both hands to avoid contact with the ground; ④ Put on the lower garment first, then the upper garment, pull the zipper to the chest,Full Body Disposable Coverall, buckle the one-piece cap on the head, and seal the zipper buckle after all the zippers are closed. Retain shopping vouchers and take the initiative to safeguard rights in time Consumers need to keep invoices and other related consumption vouchers. In case of disputes, they can safeguard their legitimate rights and interests through shopping vouchers. Return to Sohu to see more Responsible Editor:. zjyuan-group.com