[product news] mask, understand it through standard

       At present, a novel coronavirus infection control and prevention of pneumonia has started. As the "first line of defense" of personal health protection, it is very important to wear masks that meet the epidemic prevention standards. From N95, kn95 to medical surgical masks, there may be some knowledge blind spots in the selection of masks for the general public. Here we summarize the knowledge points in the standard field to help you understand the general knowledge of masks.

What are the standards for masks?

At present, the main standards of respirators in China include GB 2626-2006 self-priming filter type particle respirator for respiratory protective equipment, GB 19083-2010 technical requirements for medical protective masks, YY 0469-2004 technical requirements for medical surgical masks, GB / T 32610-2016 technical specifications for daily protective masks, covering the fields of labor protection, medical protection, civil protection, etc.

GB 2626-2006 respiratory protective equipment self-priming filter type particulate matter respirator, published by the former AQSIQ and the National Standardization Management Committee, is a full-text mandatory standard, which was implemented on December 1, 2006. The protection objects specified in the standard include all kinds of particles, including dust, smoke, fog and microorganism. The production and technical specifications of respiratory protective articles are also specified. There are strict requirements for the material, structure, appearance, performance, filtration efficiency (dust resistance rate), respiratory resistance, detection method, product identification, packaging, etc. of the dust mask.

Technical requirements for medical protective masks (GB 19083-2010) was promulgated by the former AQSIQ and the National Standardization Administration and implemented on August 1, 2011. This standard specifies the technical requirements, test methods, marks and instructions for use, packaging, transportation and storage of medical protective masks. It is applicable to the self-priming filter type medical protective masks which can filter the particles in the air and block the droplets, blood, body fluids and secretions under the medical working environment. 4.10 of the standard is recommended and the rest is mandatory.

Yy0469-2004 technical requirements for medical surgical masks, issued by the State Food and drug administration, is a pharmaceutical industry standard and implemented on January 1, 2005. The standard specifies the technical requirements, test methods, marks, instructions for use, packaging, transportation and storage of medical surgical masks. The standard stipulates that the bacterial filtration efficiency of respirator shall not be less than 95%.

GB / T 32610-2016 technical specifications for daily protective masks was issued by the former General Administration of quality supervision, inspection and Quarantine of the people's Republic of China and the National Standardization Management Committee. It is the first national standard for civil protective masks in China, which was implemented on November 1, 2016. The standard involves the requirements of mask raw materials, structure, label, appearance, etc. the main indicators include the functional indicators, such as particle filtration efficiency, expiratory and inspiratory resistance, and tightness. The standard requires that the mask should be able to protect the mouth and nose safely and firmly, and there should be no sharp angle and sharp edge that can be touched. The factors that may cause harm to human body such as formaldehyde, dye and microorganism are specified in detail to ensure the safety of the public when wearing the mask.

What are the common masks?

Now we often mention masks, including kn95, N95, medical surgical masks, etc.

The first is kn95 mask. According to the classification of national standard gb2626-2006 respiratory protective equipment self-priming filter type particle respirator, masks are divided into kn and KP according to the efficiency level of filter elements. KP is suitable for filtration of oily particles and kn is suitable for filtration of non oily particles. When kn95 respirator is tested with sodium chloride particles, its filtration efficiency shall be greater than or equal to 95%, that is to say, the filtration efficiency shall be greater than or equal to 95% for non oil particles above 0.075 μ M.

N95 respirator is one of nine kinds of particle respirators certified by NIOSH (National Institute of occupational safety and health). "N" means not resistant to oil. "95" means that the particle concentration in the mask is more than 95% lower than that outside the mask when exposed to a specified number of special test particles.

Then there is the medical surgical mask. According to the definition of YY 0469-2004 "technical requirements for medical surgical masks", medical surgical masks are "masks worn by clinical medical personnel in the invasive operation environment, which provide protection for the patients who are treated and the medical personnel who perform the invasive operation and prevent the spread of blood, body fluids and splashes". This kind of mask is used in medical environment such as clinic, laboratory and operating room. It is divided into waterproof layer, filter layer and comfortable layer from outside to inside.

Is there a mask for "pin Zi Biao"?

       On November 9, 2018, the T / zzb 0739-2018 civil oil smoke mask mainly developed by Jiande Chaomei Daily Chemical Co., Ltd. was released by Zhejiang brand building Federation. 

The main technical indicators of the standard are set according to the product performance characteristics, referring to GB / T 32610-2016 technical specifications for daily protective respirators, combined with gb2626-2006 self suction filter type particle respirator, gb19083-2010 medical protective respirator, NIOSH respirator in the United States and en149 respirator in the European Union, are mainly used in the respiratory protection field under the link with high oil particle concentration (such as kitchen and barbecue environment). According to the standard, the filtration efficiency of oil particles is more than 90%. On the basis of meeting the class a standard of civil masks and the standard indexes of European and American oil resistant masks, higher requirements are put forward for leakage, respiratory resistance, microbial index and pH value, and the requirements for delayed hypersensitivity are added.

In the market, there are many Kn90 \ kn95 non oil particle respirators. KP type respirators often have great resistance. Their beauty and comfort are industrial respirators, which are difficult to meet the daily needs of the public.

The standard formulation of civil oil smoke mask has played a positive role in the public health. For the majority of kitchen workers, the formulation of this standard is helpful to select suitable protective equipment for their working environment.

Scientific selection of masks

Experts said that in addition to providing effective protection, the wearing of masks must also take into account the comfort of the wearer, and can not bring adverse effects such as biological hazards. Generally speaking, the higher the protective performance of the mask, the greater the impact on the comfort performance. When people wear masks to inhale, they have some resistance to air flow. When inspiratory resistance is too large, some people will feel dizzy, chest tightness and other discomfort.

Different people have different industries and physiques, so they have different requirements for the sealing, protection, comfort, adaptability and other indicators of masks. Some special groups, such as children, the elderly, people with respiratory system diseases and cardiovascular diseases, should carefully select the type of mask, and avoid the occurrence of anoxia and dizziness and other accidents for a long time under the premise of ensuring safety protection.

Finally, it is suggested that no matter what type of mask you use, you should properly handle it after use, so as not to become a new source of infection. At ordinary times, we should prepare more masks, replace them in time, and build the first line of defense for health protection. I wish you all good health!

Point praise enterprise

Jiande Chaomei Daily Chemical Co., Ltd. was founded in 1996. It is a high-tech start-up company specializing in the R & D and manufacturing of respiratory protective equipment. It is also an advanced professional dust-proof Chinese PPE professional production mask enterprise with first-class scale in China. It is one of the earliest enterprises in this field in China. The company has a building area of 42000 square meters. At present, the annual production capacity of the company has reached more than 400 million. In 2003, according to the instructions of the national development and Reform Commission, Chaomei company exclusively supplied anti SARS masks for Beijing Xiaotangshan Hospital, Ditan Hospital, Beijing infectious diseases hospital, General Logistics Department of the Chinese people's Liberation Army, China Japan Friendship Hospital and national emergency materials reserve center.

Novel coronavirus pneumonia is being fought against the new coronavirus pneumonia. The company has sent 3 employees to the emergency to recall the surrounding employees, providing the most powerful material guarantee for the first-line fighters and winning the headlines of CCTV news network.

       To praise such a conscientious enterprise of "pinzibiao" and to cheer on the soldiers who are fighting in the front line, the people of the whole country have firm confidence, work together in the same boat, mobilize the whole people, and prevent and control the group. We will surely win this battle of prevention and control of epidemic.

Tips

        Recently, Zhejiang Provincial Institute of standardization quickly selected more than 20 international, foreign, national, industrial and local standards based on the needs of epidemic prevention and control standards, such as medical protective masks, medical protective clothing, medical protective equipment, etc., providing professional technical support for the selection, import and even guidance of enterprises in the production of masks and other related protective products, and actively helping to improve epidemic prevention To control the quality of products and solve the shortage of medical materials.

The website for reference of relevant standard texts is as follows (copy the address below to open the browser, or click "read the original text" at the end of the text):

http://www.zjsis.com/DataCenter/Standard/StdSearch.aspx?Token?Token=$Token$&First=First。