Water permeability and light transmission of fabric
May 15, 2019
Water permeability
Definition: Performance of liquid water penetrating from one side of the fabric to the other
Mechanism: The essence of fabric permeation is the liquid phase transfer of water, that is, the process of water passing from a high pressure side to a low pressure side when there is a water pressure difference on both sides of the fabric.
Relationship with clothing comfort
The fabric should prevent the water from reaching the outside, such as rainwater, that is, the fabric should have a certain waterproofness; when the sweat on the surface of the human body is wet, the sweat should be discharged through the fabric as soon as possible; the ideal fabric can prevent external water from entering and To ensure that the body's moisture can be discharged in a timely manner, that is, it has a waterproof and moisture permeable effect.
The passage of liquid water through the fabric:
1. The pores in the fabric are the main way of water permeability.
2. Fiber surface infiltration and capillary transfer are the most important way to conduct water.
3. Water conduction in the fiber is the secondary water guiding route
Ways to form a waterproof and moisture permeable fabric:
1. By adjusting the pore size of the fabric. Forming micropores;
2. Change the surface properties of the fiber and increase the contact angle of the fabric surface
Transmittance
The meaning of fabric translucency
The performance of light through the fabric involves the transmitted light intensity directly through the fabric aperture and the transmitted light intensity through the fiber.
