The Method Of Suede Raising - Sanding And Brushing Process.
The sanding process is generally carried out in the dyeing factory. It belongs to the pre-treatment stage in the production process of suede fabrics. It is also very important to add a certain amount of fluffing agent in the reservation. The flat surface of the cloth can reduce the generation of sanding strips). Sanding is to put the side of the suede that can be raised, through the sanding machine, and wrap it with emery. With the high-speed rotation of the rotating rod, the sandpaper rubs against the fabric and fluffs it!
This machine belongs to dry grinding machine, mainly used for sanding of woven suede and air layer suede! There are several sanding rollers on the sanding machine, and the number of meshes of the sandpaper bound to each sanding roller is different. By adjusting the tension and the speed of the sanding roller, the length of the wool feeling can be controlled!
Diamond abrasives used in suede suede sanding machines. The quality, softness and hardness of the sand skin, and the size of the mesh have a great influence on the sanding effect! There are several meshes of sanding leather. The larger the mesh number, the finer the sanding effect. Therefore, different velvet needs can be controlled by changing the sandpaper on the sanding machine.
Sanding is to control the velvet feel through the tension, the gravity of the sanding roller, and the speed of rotation. This determines that sanding can only be used to grind thicker, less elastic, and relatively flat suede, such as four-way elastic suede. Once the fleece is tensioned, the width of the door will shrink very much, and it is easy to produce sanding strips, which requires another method of raising piles - napping! Napping is through the rapid rotation of the rotating roller covered with steel needles on the napping machine, which is equivalent to the needles being stuck in the fabric and then picked up, so as to achieve the effect of napping!
Generally, warp-knitted suede, elastic suede, softer and thinner suede are raised by napping machines. Sometimes a cylinder of cloth needs to be brushed several times, 8 times or 10 times, in order to obtain a finer velvet feel. Brushing can greatly increase the density of suede. For example, if weft suede is only sanded, there will be a serious problem of bottom leakage (the fluff is relatively small, you can look at the crosspiece at the bottom of the fabric), which can be improved by brushing first and then sanding.
