N95 Face Mask Ear Tape Knitting Machine

Machine model: Dt2020EA

Machine name: N95 Mask rope crochet knitting machine

Machine size: 3.85m * 1m * 1.85m

Material: Polyester + Spandex / Nylon + spandex

Size: 5mm

Color: white

Pattern: flat/round

This flat elastic band is suitable for all kinds of facial mask hanger, mask elastic band, KN95 mask, FFP2 elastic earring, fluffy hat elastic belt, doctor cap elastic belt, medical mask elastic band, tubular elastic earring, gloves elastic band, facial mask elastic rope, mask bungee jumping, surgical mask earring.

Information about textile industry

Liu Ji, associate researcher of Beijing Institute of labor protection science: Children's masks give consideration to both comfort and protection effect

Compared with the adult mask, the market of children mask is smaller, and the size and specification of children of different ages are quite different. In order to produce children's masks that meet the national standards, the key is to solve the problem of filtration and mask materials. The object of the study of particulate matter filtration efficiency and bacterial filtration efficiency is the filter materials used in masks, which is the international general evaluation index of respiratory filter materials.

From the point of view of test methods, the evaluation of particulate matter filtration efficiency and bacterial filtration efficiency in the code is based on current national standards and industry standards. This test requirement is basically consistent with GB 2626-2006, and the high humidity treatment is added compared with GB 19083-2010. The test of bacterial filtration efficiency of respirator is consistent with the current industry standard YY 0469-2011. The consistency of the test method ensures the scientificity of the standard test method for the filter efficiency of the mask filter material and the consistency with the current compulsory national standards and the industry standard system, which is convenient for the use of the mask manufacturer, as well as for the implementation of the market supervision agency and the product testing agency.

The protective effect is a technical index to evaluate the protective ability of respirator to particles during wearing. The protective effect was first introduced by the recommended national standard GB / T 32610-2016 technical specification for daily protective masks. In the code, the method is used to test the protection ability of the respirator in the actual wearing process, and three improvements are made. The first is to introduce five kinds of movements, i.e. static, shaking head, nodding, speaking and static, to simulate the possible behavior of children wearing masks, and to investigate the influence of the above actions on the protective ability of masks. The above activities are basically consistent with the compulsory national standards GB 2626-2006 and GB 19083-2010, ensuring the comprehensiveness of the investigation. The second is to modify the respiratory frequency to 20 times / min, and the corresponding respiratory flow is 20L / min, which is higher than the short-term respiratory volume of children aged 6-9, slightly higher than the short-term respiratory volume of children aged 9-12 under the condition of moderate intensity exercise, so as to ensure that the respiratory process of the simulated head model can roughly reflect the respiratory characteristics of the mask users. Third, according to the national standard GB / T 26160-2010 "dimensions of the head and face of minors", the size specifications and types of the test head mold are carried out to ensure the representativeness of the test head mold. The improvement of these three aspects makes the standard more comprehensive and scientific in the test of the protective effect of child protective masks. According to the standard, the protective effect of the child protective mask shall be ≥ 90%, which is consistent with the leakage rate requirements of kn95 respirator in the national standard GB 2626-2006, ensuring the effective protective ability of the respirator.

The comfort requirement (respiratory resistance) is the main index to investigate the effect of respirator on the user's respiratory process. The test method is to wear the respirator on the simulation head mold, and test the resistance increase of the test system caused by the respirator under the specified flow conditions.

According to the specification, the flow rate of respiratory resistance test is (45 ± 2) l / min, which can reflect the breathing process of children. At the same time, the test is carried out with a headform conforming to the size of minors to ensure the actual wearing effect of the mask. The standard preparation group stipulated that the resistance of children's masks should be tested at 45L / min, and the inspiratory resistance should not be greater than 45pa, so as to ensure the safety of children of lower age.

3 Huang Lina, researcher of Guangzhou Customs Technical Center: analyze behavior characteristics and strengthen children's awareness of risk prevention

Compared with adults, children have their own behavior characteristics. The formulation of the code mainly considers children's behavior characteristics. It is the nature of children to be lively and active. Children may pull and lick the mask when wearing the mask. Therefore, the specification stipulates that the materials in contact with the mask and the face shall not be printed or dyed. The requirements for chemical residue and pH value of the mask materials are significantly higher than the adult standards, especially the requirements for the limit of ethylene oxide ≤ 2ug / g, and the movable fluorescent whitening substances cannot be detected 。

In order to ensure that children are not contaminated by mask dyes, the code takes color fastness as the assessment index, and the index value is set according to GB 18401-2010 basic safety technical specifications for textile products.

Based on the consideration of children's behavior characteristics, the code has added a number of physical performance indicators compared with the adult mask standard. For example, the respirator valve on the mask should not fall off during use, and the mask belt should not be tied. There is no obvious pressure and tenderness during wearing, which has little impact on head movement. At the same time, it is stipulated that the nose clip should be made of plastic material, with a length of ≥ 5.5cm, and it should have certain folding resistance. The code fully considers the influence of children's behavior characteristics on the safety of wearing masks.

Children lack the ability to analyze and judge things. When the danger comes, they may be hurt due to the lack of self-protection ability and risk aversion awareness. For example, potential risks such as skin allergy that may occur in the process of wearing respirator, respiratory discomfort caused by chasing movement, suffocation risk caused by moisture and water, incorrect wearing of respirator, etc. are fully considered in the code, which also gives relevant warning contents and requires the manufacturer to make clear the identification.

According to the development characteristics of children in different age groups, the standard divides children's masks into three models: large, medium and small, which can meet the needs of children in different age groups. Under the premise of safety and protection, parents can choose the most suitable masks for children.

The publication of the code provides a reference for other countries to formulate the standards of children's masks. Children's life style in different countries

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