Technical standard for mask filter meltblown PP non-woven fabric

Medical masks are generally composed of non-woven fabrics, meltblown fabrics, nose bridge strips, ear straps, etc. The main structure is a three-layer non-woven fabric, also known as SMS structure. The differences and functions between them are as follows:

The inner S layer is ordinary non-woven fabric, which is mainly hygroscopic;

The outer S layer is a non-woven fabric with waterproof treatment, which is mainly used to isolate the liquid sprayed by the patient and play an anti-dropping effect;

The M layer uses an electret-treated meltblown non-woven fabric, which can filter suspended bacterial particles and is the most important core layer.

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