A mask is an important tool used to protect the respiratory tract, and the breathability of a mask is a key factor. A mask with good breathability can provide a comfortable wearing experience, while a mask with poor breathability may cause discomfort and even breathing difficulties. Non woven fabric materials are widely used in mask manufacturing.
what is the breathability of non-woven fabric materials?
Non woven fabric is a type of non-woven fabric made by spinning fibers through wet or dry methods. Compared with traditional textiles, non-woven fabrics do not require weaving or weaving, and can directly form a network structure of fibers. Due to its unique structure, non-woven fabrics have many advantages, such as softness, lightness, and breathability. Breathability is one of the important properties of non-woven fabrics and also one of the factors that need to be considered during the wearing process.
The breathability properties of non-woven fabrics can be measured by the gas permeation method, which can determine the breathability performance of non-woven fabrics. Gas permeation method refers to evaluating the breathability of non-woven fabrics by measuring their ability to penetrate gas. By contacting the non-woven fabric sample with air at a certain pressure, the speed and pressure difference of air passing through the sample can be measured, and the breathability of the non-woven fabric can be calculated based on these parameters. The unit of air permeability is usually cubic meters per square meter per second.
Air permeability
Under normal circumstances, the human body needs to breathe about 6-10 liters of air per minute, so a good mask should have a certain degree of breathability to ensure normal breathing. According to relevant standards, the breathability of medical masks should be above 2.5 cubic meters per square meter per second, while the breathability of regular masks should be above 1.5 cubic meters per square meter per second. This breathability ensures that the mask does not cause too much resistance to breathing when worn.
From the perspective of non-woven materials, air permeability is related to the density, diameter, and gap size of its fibers. Generally speaking, the smaller the fiber diameter of non-woven materials, the larger the gap between fibers, and the better the air permeability. In addition, the preparation process of non-woven fabric materials can also affect the breathability. For example, non-woven fabrics prepared by hot air method often have good breathability, while non-woven fabrics prepared by hot air method have poor breathability.
Filtering performance
In addition to breathability, the filtering performance of a mask is also an important indicator. The filtration performance is usually evaluated by the filtration efficiency of the mask, that is, the ability of the mask to filter particulate matter in the air. The filtration efficiency of traditional non-woven materials is relatively low, so a multi-layer structure is usually used in mask manufacturing, with one layer of filter fabric to improve filtration efficiency. Meanwhile, filtering fabrics may also have a certain impact on the breathability of masks.
In summary, the breathability of non-woven materials depends on the diameter, density, and gap size of their fibers. A mask with good breathability can provide a good breathing experience when worn, while a mask with poor breathability may cause discomfort. When manufacturing a mask, it is necessary to comprehensively consider breathability and filtration performance, and coordinate the balance between the two. Only masks can provide a comfortable wearing experience and ensure smooth breathing while ensuring moderate filtration performance.
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Post time: Apr-29-2024