1. The density of the build-up layer depends on the type of fiber, the beating conditions and the forming conditions. It determines the air permeability and bulk of the paper support.
2. The degree of fiber entanglement determines the strength of the mobile phone paper holder in the thickness direction and the horizontal direction.
3. The obvious difference in structure between the surface part and the middle part of the laminated layer and the difference between the filter surface and the non-filter surface are due to the low retention rate of fine fibers, fillers, additives and other solid particles on the filter surface, while the original long fibers After the filter layer is formed on the filter surface, the retention rate in the thickness direction gradually increases.
4. The directionality of fiber arrangement determines the anisotropy of mobile phone paper holder products.
