Factors affecting the breathability of hot air non-woven fabrics?

As a new type of material widely used in medical, sanitary, home and other fields, the breathability of hot air non-woven fabrics is one of its important properties in various application scenarios. However, the breathability of hot air non-woven fabrics is affected by many factors. This article will explore these factors that affect the breathability of hot air non-woven fabrics in depth to better understand and apply this important material.

The breathability of hot air non-woven fabrics is affected by their raw materials. Generally, the raw materials of hot air non-woven fabrics mainly include synthetic fibers such as polypropylene and polyester. Different raw materials have different fiber structures and characteristics, which will affect the pore structure and density of hot air non-woven fabrics, and thus affect their breathability. Therefore, when preparing hot air non-woven fabrics, it is necessary to select suitable fiber materials according to specific application scenarios and requirements to ensure that the hot air non-woven fabrics have good breathability.

In the preparation process of hot air non-woven fabrics, hot pressing treatment is a key step. Hot pressing treatment can change the fiber structure and arrangement of hot air non-woven fabrics, thereby affecting their pore structure and density, thereby affecting their breathability. Appropriate heat pressing treatment can make the pore structure of hot air nonwoven fabric more uniform and stable, and improve its air permeability; while excessive or insufficient heat pressing treatment may lead to uneven pore structure and affect its air permeability.

The fiber density and arrangement of hot air nonwoven fabric also have an important influence on its air permeability. Lower fiber density and wider fiber arrangement gap will increase the air permeability of hot air nonwoven fabric, making it easier to breathe; while higher fiber density and denser fiber arrangement will reduce its air permeability and make its air permeability worse. When designing and preparing hot air nonwoven fabrics, it is necessary to reasonably control the fiber density and arrangement to achieve appropriate air permeability.

The material treatment and additives of hot air nonwoven fabrics will also affect its air permeability. For example, some additives may change the surface properties of hot air nonwoven fabrics, affect its pore structure and surface tension, and thus affect its air permeability. When selecting and using material treatment and additives, it is necessary to consider their impact on the air permeability of hot air nonwoven fabrics, and make reasonable control and adjustment.

The air permeability of hot air nonwoven fabrics is also affected by the use environment and conditions. For example, in high temperature, high humidity or humid environment, the air permeability of hot air non-woven fabrics may be affected and the air permeability may be reduced. In actual use, it is necessary to select appropriate hot air non-woven fabrics according to the specific situation to ensure that its air permeability can meet the actual needs.

There are many factors that affect the air permeability of hot air non-woven fabrics, including the selection of fiber materials, hot pressing treatment, fiber density and arrangement, material processing and additives, as well as the use environment and conditions. Reasonable control and adjustment of these factors can effectively improve the air permeability of hot air non-woven fabrics, so as to better meet the needs of various application scenarios.