Analysis of the advantages of breathability of PVC artificial leather

The hygienic performance of PVC artificial leather, simply put, refers to the breathability and water vapor permeability of PVC artificial leather. Because the real man-made contains small fiber bundles in the form of a mesh, it has considerable strength and breathability. Today, Mingjia Xiaobian will introduce to you.
1. Air permeability: Air permeability refers to the amount of air that permeates a unit area of artificial leather under a certain pressure and for a certain period of time. The air permeability of various PVC artificial leathers varies greatly. The textile and looseness of the fiber structure of the PVC artificial leather itself and the performance and thickness of the coating layer are decisive for its air permeability. Generally speaking, coated PVC artificial leather is less breathable than uncoated PVC artificial leather, and the thicker the coating, the less breathable; suede leather is more breathable than full-grain leather (leather that retains the surface of PVC artificial leather) .

2. Water vapor permeability: The water vapor permeability of PVC artificial leather, also known as moisture absorption and moisture removal, means that PVC artificial leather can enable water vapor from the air on the side with higher humidity to enter the air on the side with lower temperature through PVC artificial leather. performance. The water vapor permeability of PVC artificial leather depends on its air permeability, and it is also affected by the moisture absorption capacity of PVC artificial leather itself. Because PVC artificial leather has good water vapor permeability, the sweat vapor when people wear PVC artificial leather products can be smoothly discharged into the air, making people feel that wearing PVC artificial leather products is much more comfortable than artificial leather.

Fastness is an important indicator of the inherent quality of artificial leather. In order to fully reflect the fastness performance of artificial leather, the fastness of artificial leather is divided into the following categories:
1. Tensile strength: refers to the maximum breaking load force that a unit cross-section of PVC artificial leather can withstand. This indicator is one of the important indicators of the fastness of surface PVC artificial leather. In other words, the size of the tensile strength reflects the strength of the PVC artificial leather to break.
2. Tear strength: refers to the maximum load force that the PVC artificial leather can withstand to continue tearing per unit thickness. It mainly shows the size of the external tensile force that the pinhole can bear after the PVC artificial leather is stitched. Therefore, if the tear strength of PVC artificial leather is too low, it is easy to tear from pinholes or other openings.
3. Cracking strength: refers to the load force on the unit area of the PVC artificial leather when it is lifted up and the inside (surface) is cracked. This strength index mainly reflects the processability of PVC artificial leather, and is not very important in actual wearing.
4. Bending strength: refers to the number of times the PVC artificial leather is bent when the surface is damaged by repeated bending. The level of this indicator has a great impact on the wearing life of some PVC artificial leather products. For example, the bending resistance of cattle soft upper leather is dozens of times higher than that of cattle modified upper leather. The bending strength of the former is much higher than that of the latter, and it is not easy to be broken during its use.