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Detection index of mask non-woven fabric

Release time: 2021-02-07

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Detection index of mask non-woven fabric


First of all, we should know that the scientific name of non-woven fabric is non-woven fabric, so the standard of non-woven fabric is mostly named after non-woven fabric. The non-woven fabrics used in the production of masks are mostly polypropylene spunbonded non-woven fabrics and polyester non-woven fabrics. Here we recommend to refer to the textile standard FZ/T 64033-2014 "Spunbond Hot Rolled Nonwoven Fabric".

 

According to the regulations in FZ/T 64033-2014, the internal quality inspection items of mask non-woven fabrics mainly include width deviation, mass deviation per unit area, coefficient of variation of mass per unit area, breaking strength, and elongation at break. The appearance quality inspection items mainly include color difference, defective edge trimming rate, joints, frit, foreign matter, defective rate of auxiliary net, soft folds, etc.

 

KM1095 Face Mask


Of course, since there is no clear standard, Zhongshan Saifute summarizes previous experience in mask testing and non-woven testing, and proposes several important testing indicators, namely filtration efficiency, respiratory resistance, hygiene indicators, and toxicology tests.


1. Filtration efficiency

As we all know, filtration efficiency is a key indicator of mask quality assessment. This is also one of the important quality standards of non-woven fabrics, so referring to relevant standards, we recommend that the bacteria filtration efficiency of mask non-woven fabrics should not be less than 95%, and the particle filtration efficiency for non-oily particles should not be less than 30%.


2. Respiratory resistance

Respiratory resistance is the size of the influence that hinders breathing when people wear a mask. Therefore, the breathing resistance of the mask non-woven fabric determines the breathing comfort when wearing the mask. The index we recommend here is that the inhalation resistance should be ≤350Pa and the expiration resistance should be ≤250Pa.


TP301 Face Mask


3. Health indicators

Health indicators are naturally another important key indicator of non-woven masks. Here we recommend testing items mainly including initial contaminating bacteria, total bacterial colonies, coliform bacteria, pathogenic pyogenic bacteria, total fungal colonies, Escherichia coli, Staphylococcus aureus, Candida albicans, residual ethylene oxide, etc.


4. Toxicology test

The skin irritation test mainly considers the protective test test for people allergic to some materials. Refer to the regulations in GB 15979. The skin irritation test of the mask non-woven fabric is mainly to cut a sample of a suitable area, soak it with normal saline, and paste it on the skin, and then cover it with a patch sticker for testing.

Among the above indicators, the filtration efficiency of mask non-woven fabrics is undoubtedly the top priority in the detection of these indicators.

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