Research on the Porosity and Pore Size of Spun-Bonded Fabrics Based on Matlab7.0 Image Processing Technology

Abstract:

The image with high resolution was obtained through scanning the spun-bonded fabric, and processed with the help of Matlab7.0 software to calculate the pore structure of the spun-bonded fabric. On the basis of the relationship between number of pixels and area, the porosity and average pore size of spun-bonded fabric were analyzed; pore size and porosity were calculated by using the equation method and the air bubble test method as well. By comparing the data of the two methods, the correlation between them was gotten. Finally, it was shown that using the image processing technology to research the pore structure of spun-bonded fabric was a feasible way. There are various factors affecting the performance of textile filtering materials, and the porosity and pore size of the fabrics play an important role in filtration. As is known to all, fabric porosity and pore size are indicators to measure the size of fabric pore volume, one is the ratio of pore volume with the total fabric volume, and the other one refers to the average diameter of the holes in the textile filter material. They directly affect the permeability, the hydraulic conductivity of the fabric and the ability to prevent the particles getting through. Generally speaking, the bigger the porosity and pore size, the greater the permeability coefficient and the better the permeability of the filter material. Porosity and pore size directly affect the product's function and application. Therefore, the pore structure has a great impact on textile filter performance [1]. Nowadays, the formula method was generally used to calculate the porosity, and the bubble method was always used in testing pore size.