Spunlace Nonwoven Fabric, also known as spunlace nonwoven fabric, is widely used in many fields such as medical care, beauty and skin care, and household cleaning due to its softness, water absorption, breathability, and environmental protection. Understanding and controlling its fiber distribution and density is crucial to ensuring product quality and optimizing production processes.
1. Visual inspection and microscopic analysis
Visual inspection is the basic method for preliminary evaluation of the uniformity of fiber distribution. By observing the flatness, color consistency, and whether there are obvious fiber clumps or sparse areas on the surface of the fabric with the naked eye, the uniformity of fiber distribution can be preliminarily judged. However, this method is limited by human subjective judgment and is difficult to quantify accurately.
Microscopic analysis provides a more sophisticated means of observation. Using an optical microscope or an electron microscope, the fiber structure can be magnified to observe details such as the arrangement of fibers, the density of intersections, and the diameter of a single fiber. By taking photos and recording and comparing and analyzing microscopic images of different areas, the uniformity and density of fiber distribution can be more accurately evaluated.
2. Image processing technology
With the development of computer technology, image processing technology is increasingly used in textile testing. By inputting the fiber images taken by the microscope into the computer and analyzing them with special image processing software, the fiber coverage, average fiber diameter, fiber spacing and other parameters can be automatically calculated, thereby realizing the accurate quantification of fiber distribution and density. This method has the advantages of high efficiency, objectivity and repeatability, and is one of the important means of modern textile testing.
3. Physical performance test
In addition to directly observing the fiber structure, the fiber distribution and density can also be indirectly reflected through physical performance tests. For example, the air permeability of spunlace nonwoven fabrics is measured using an air permeability tester. The quality of the air permeability is often related to the size, number and distribution of the pores between the fibers, thereby indirectly reflecting the density and distribution of the fibers. In addition, mechanical performance tests such as tensile strength and tear strength can also be performed. These properties are closely related to the bonding strength between fibers and the uniformity of fiber distribution.
4. Professional testing instruments
In order to more accurately detect the fiber distribution and density of Spunlace Nonwoven Fabric, a variety of professional testing instruments have also appeared on the market. For example, a laser scanner uses a laser beam to scan the cloth surface, and calculates the height and spacing of the fibers by measuring the time difference or angle change of the reflected light, thereby obtaining detailed information on the fiber distribution. In addition, there are some fiber density measuring instruments based on optical principles, which can directly measure the number or quality of fibers per unit area, providing a convenient means for quantifying fiber density.