These Hard Core Indicators Must Be Known. Full Interpretation Of Group Standard Of "Sanitary Respirator"

In March 11th, the national standard of sanitary masks was officially issued by the China Industrial Textiles Association. The promulgation and implementation of the standards will provide technical support for relevant mask manufacturers and provide basis for market supervision so that consumers can choose suitable respirators. The standard is composed of Standardization Technical Committee of China Textile Industry Federation Sum China Industrial Textiles Association The technical committee of standardization is jointly administered. The relevant leaders of the middle society carried out authoritative interpretation of the standard.

I. task sources

Standard for sanitary respirators It is compiled according to the standard formulation plan issued by China Federation of textile industry and China Textile Industry Association (plan number: 202001-CNTAC001 and 2020-09-104). The standard is derived from China Industrial Textiles Association Responsible for drafting, Standardization Technical Committee of China Textile Industry Federation Sum Standardization Technical Committee of China Industrial Textiles Association Collective standards of collective management.

Two, demand basis

The outbreak of a new crown pneumonia outbreak in Wuhan in January has spread throughout the country. This is the major public health emergency that has occurred in China since the founding of new China, with the fastest speed of spread, the widest range of infection and the most difficult prevention and control. In order to protect people's safety and avoid the spread of virus, medical experts suggest that you wear a respirator in public places. Mask has become the key material to prevent and control epidemic situation. Mask becomes a necessary protective equipment for epidemic situation.

Facing the situation of urgent demand and large demand for masks, related enterprises are actively resuming production and converting production. In order to fight overtime, the supply of masks is increasing, and the situation of supply and demand is relieved. What follows is the demand for masks for resuming work, resuming production and resuming learning.

At present, there are 3 types of mask standards in China. Standard of civil respirator Taking GB/T32610's "daily protective mask technology standard" as the representative, it mainly aims at air quality pollution environment. Standard of protective masks in industrial field Taking GB 2626 - 2006 respiratory protective equipment self suction particulate filter respirator as the representative, it is mainly suitable for industrial workplaces. Medical field standard The standards are: GB 19083 - 2010, "medical respirator technical requirements", YY 0469 - 2011 "medical surgical mask", YY/T 0969 - 2013 disposable medical mask, which is mainly applied to the medical field. According to the use scenarios of mask and users, what standard production of sanitary masks should be used by ordinary consumers at present, which has puzzled manufacturers and market regulators.

In order to better meet the urgent needs of public health masks, it is convenient for enterprises to use the masks to produce and transfer masks in the current emergency situations, while ensuring product quality and facilitating market supervision. The China Industrial Textiles Association and the Ministry of science and technology development of the China Federation of textile industry have organized the respirator production enterprises, filter material production enterprises, testing institutions and universities to set up the standard of "sanitary respirators" for the China Textile Federation Standardization Technical Committee. The standard is led by the China Industrial Textiles Association. Under the guidance of experts from the medical, personal protective industries and institutions, the masks manufacturers, filter material manufacturers, testing institutions and colleges and universities jointly drafted. The promulgation of this standard will provide technical support for mask manufacturers and provide basis for market supervision so as to facilitate consumers to choose suitable respirators.

Three, the main content of the standard setting

This standard is applicable to sanitary respirators used for blocking particles such as droplets, pollen and bacteria in daily environment. It includes adult masks and children's masks for children who need them. Therefore, indicators are closely related to the functions and safety settings of masks, including material safety, wearing safety and necessary protective functions. In particular, special attention has been paid to the comfort of wearing masks. Generally speaking, at the same level of technology, the higher the protective performance, the lower the comfort will be. For the protection of children's respiratory system, under the current technical level, the ventilation pressure of children's respirators has set a relatively low index value. The technical specifications of this standard refer to the relevant standards, and the relevant laws, regulations, regulations and relevant standards are in accordance with the existing standards. This standard does not apply to infants under 36 months and below.

Four, main technical indicators and testing methods

1, basic requirements 。 The basic requirements are the safety requirements for the materials used in masks, the materials for masks and the design of masks, which reflects the safety concerns of consumers wearing masks.

(1) the mask should be able to cover the mouth and nose safely and firmly. It should have good facial adhesion and no odor.

This clause is the basic requirement for mask design. Under the premise of beauty, mask designers need to study the facial characteristics of consumers, and ensure that the face mask has good adhesion with the wearer's face, so as to lay a foundation for the protection function.

(2) raw materials for masks should not be recycled. They should not contain harmful substances such as carcinogenesis, allergy, skin irritation, and so on. Limiting the use of residual substances should comply with the relevant requirements and must not be treated by chlorine bleaching. 。

This clause is the requirement for the materials used in the production of respirators, and is the most basic requirement for the safety performance of respirators. However, this standard does not require specific materials, and encourages enterprises to use new materials that meet the relevant requirements for civil masks.

(3) masks should not have sharp sharp edges and sharp edges. They should not cause harm to wearers. Children should not expose metal with respirators. 。

This clause is designed to protect the wearer from the perspective of safety and accessories. When selecting accessories, enterprises need to pay attention to the requirements of this clause.

(4) masks should be easy to wear and remove. There is no obvious pressure or tenderness in the process of wearing, and it has little effect on head activities. Children should use ear mask masks with children's masks, no removable small parts should be used, and the mask should not have free ends. 。 The mask with a nose clip should be made of plastic material.

This clause is considered from the perspective of safety and comfort, and the requirements for mask design and accessories, especially children's lively and active, mask accessories and design can not cause potential hazards to children. Manufacturers need special attention.

(5) appearance: the appearance of the mask should be neat and in good shape, and there should be no breakage or stains on the surface. Mask and skin contact materials should not be dyed. 。

Because the respirator is directly protected on the mouth and nose, for safety reasons, it is required that the respirator should not be dyed directly with the skin, but this requirement does not apply to the outer layer of the mask, whether the outer layer of the mask is dyed and whether there are various designs are designed by the enterprise itself, and the standard does not require. However, if it is dyed, the color fastness to dry friction should be tested.

2, nose clip length. At present, there are different forms of mask design. In order to enhance the bonding with the face, most enterprises use nasal clips, but some enterprises use the nose clamp to achieve the bonding with the face. This standard encourages enterprises to personalize their designs, and to provide consumers with more fashionable masks while meeting barriers. For the nose mask, the minimum length of the nose clip for adult mask and child mask is specified.

3. The mask is connected with the mask body to break the strength. 。 The connection strength between the mask and the mask is one of the factors that ensure the wearing of the mask. This standard stipulates that the connection strength between the single mask and the mask is not less than 5N.

4, bacterial filtration efficiency. Bacteria are a single celled organism that invades the local tissue and systemic inflammatory reaction that may cause the human body. As a sanitary mask used in everyday environment, bacteria are the basic protective function of bacterial filtration. The index of bacterial filtration efficiency of this standard refers to the relevant indicators of YY0469-2011 medical surgical mask, which stipulates that the efficiency of bacterial filtration is not less than 95%, so as to meet the requirements of bacterial protection after wearing masks for ordinary consumers.

5, particulate matter filtration efficiency. Particulate matter is suspended in the atmosphere of different sizes, including dust, droplets, aerosols and so on. Mask filter material can play the role of filtering these considerations. Particulate matter filtration efficiency is an international evaluation index for respiratory filtration materials. Combined with the application scope of this standard and the technical level of melt blown filter material, the particulate matter filtration efficiency of this standard is not less than 90%.

6. Ventilation resistance: This is a comfort index for wearing masks. The reference value is referred to YY0469-2011, and the ventilation resistance of adult respirator is set to be less than 49Pa. According to the current domestic respirator filter technology level, taking into account the physiological condition of children, the ventilation resistance of children's mask materials is set to be less than 30Pa.

7, ethylene oxide residue 。 This item is a safety index. Ethylene oxide is an organic compound. It is a toxic carcinogen and is widely used for sterilization. Most mask manufacturers use ethylene oxide to kill microorganisms. After the mask was sterilized by ethylene oxide for a certain time, ethylene oxide basically evaporated, leaving only traces of residue. The state has control requirements for its residues. This standard is based on the technical requirements of GB19083-2010 medical masks. It is stipulated that the ethylene oxide residue of the sanitary respirator treated by ethylene oxide is set to be less than 10 g/g, so that the wearer is safe.

8, color fastness (dry friction), formaldehyde content, pH value, decomposable carcinogenic aromatic amine dye. 。 The above indicators are the basic requirements of textile materials. The index is set according to the relevant regulations of the basic safety technical specification of national textile products according to GB18401. The formaldehyde content of adult masks is the same as that of children's masks.

9. Microbial indicators. Microorganisms are closely related to human life, which are invisible or invisible to the naked eye. Setting microbes is the basic requirement of hygienic products. Referring to GB15979-2002 hygienic standard for disposable sanitary products, the standard set the index value for the common microorganism.

10, flame retardancy. Children's ability to deal with emergencies is poor. Taking into account the sudden fire may cause harm to children, the flame-retardant properties of children's respirators are specified. Indicators refer to YY0469-2011 medical surgical mask, and the time when the mask is removed from the flame is not more than 5S.

11, test methods. The testing method in this standard refers to the relevant contents of current national standards and industry standards. It has strong operability and high market acceptance. It can meet the test requirements of this standard. Relevant enterprises and testing institutions can be used quickly.

Five, implementation recommendations

This standard is a newly established standard, which can be used as the technical support and market supervision basis for enterprise production. It is recommended that the production enterprise do the following work:

1. according to the applicable population of the mask products of the unit, the applicable standards shall be reasonably selected.

2. read the standards in detail and understand the standards.

3. select qualified masks to use raw materials, and suggest to ask suppliers for inspection reports of materials.

4., clear identification, clear instructions and traceability.