Does antiviral yarn achieve its antiviral effect through physical barrier or chemical reaction?

The antiviral mechanism of antiviral yarn may vary in different products. Generally, these two mechanisms—physical barrier and chemical reaction—are not mutually exclusive, but can complement and cooperate to enhance their antiviral effect.
In terms of physical barrier, the design of antiviral yarn emphasizes preventing the spread of viruses through the arrangement density, weaving structure or surface coating of its fibers. When the density of the yarn is high, it is more difficult for virus particles to penetrate the fiber surface. This physical barrier can effectively reduce the contact between airborne virus particles and people. For example, some antiviral yarns may limit the chance of virus particles spreading in the air through a tighter weave. In addition, the use of special fiber structures, such as ultrafine fibers, can also increase the surface area and improve the ability to capture viruses. Physical barrier mainly relies on the physical properties of the fiber itself, rather than the action of chemicals, and can reduce the spread of viruses to a certain extent.
In terms of chemical reaction mechanism, antiviral yarns usually contain special antiviral ingredients, such as nanosilver, nanocopper, nanozinc or other metal ions, or are treated with chemical processes to make the fiber surface have antiviral activity. These antiviral ingredients can react chemically with the virus's shell, protein or genetic material, thereby destroying the structure or function of the virus. For example, nanosilver and nanocopper have natural antibacterial and antiviral properties. They can react with the cell wall of the virus by releasing silver or copper ions, causing the virus's outer membrane to rupture and inhibit its activity. Through this chemical mechanism, antiviral yarns can kill viruses and even prevent them from entering host cells to replicate.
In many advanced antiviral yarns, physical barriers are often used in combination with chemical reaction mechanisms. For example, the surface of the yarn may be chemically treated to enhance its antiviral properties while maintaining the structural density and function of the fiber. This multiple protection mechanism can provide more comprehensive virus protection, especially in high-risk environments such as medical facilities, public transportation, and places with high density of people.
For the durability of antiviral yarns, chemical reaction mechanisms are usually more durable than physical barrier mechanisms. Because chemical components usually react with viruses for a long time, while physical barriers may reduce their effectiveness over time, washing or wear. For example, the physical barrier effect of antiviral yarns may weaken after multiple washings, but if its chemical antiviral components are properly designed, they can maintain certain antiviral properties even after washing. Therefore, many high-quality antiviral yarn products will adopt composite functions in design, that is, combining physical barriers and chemical reactions to ensure long-term stability of the antiviral effect.
The application of antiviral yarn is not limited to personal protective equipment, such as masks, gloves, clothing, etc., but can also be extended to daily necessities such as bed sheets, curtains, home decoration, medical equipment, etc. Through these products, antiviral yarn can play a role at multiple levels to reduce the risk of virus transmission. The actual application effect of these yarns also depends on the durability of their antiviral function and the actual virus concentration in the use environment.