1. Sanding refers to rubbing the cloth surface with an abrasive roller or metal roller. Different fabrics use different sand leather mesh numbers for combination. to achieve the desired sanding effect. The general principle is to use high mesh sand leather for high count yarns. Low-count yarns use low-mesh sand leather. The sand roller has forward and reverse rotation functions. Generally use an odd number of sand rollers.
[Factors affecting the sanding effect]
Sanding roller speed, machine speed, cloth body moisture content, covering angle, tension, etc.
2. To capture wool, a steel wire bent needle at a certain angle is inserted into the yarn. Hook out the fibers. Formation of hairiness. It means the same thing as hair pulling. Different fabrics use different steel needles. There are round heads and pointed heads. Use a pointed tip for cotton. Use round heads for furry species.
[Influencing factors] Vehicle speed, card clothing roller speed. The number of card cloth rollers, moisture content, tension, card cloth density, steel needle bending angle, yarn twist, additives used in pre-treatment, etc.
3. Brushing uses a bristle roller like a brush to sweep across the cloth surface.
Use different bristle rollers for different fabrics and treatments. There are bristle brushes, steel wire brushes, carbon wire brushes, and ceramic fiber brushes. For simple treatments use a bristle brush. Such as brushing cloth before singeing. Wire brushes are generally used for fabrics that require intense nap, such as knitted velvet. Carbon silk brushes are used for high-grade cotton fabrics. The surface treatment requires fineness. Processing requirements require more sophisticated use of ceramic fibers.
[Influencing factors] Number of brush rollers, rotation speed, stiffness of brush filaments, fineness of brush filaments, density of brush filaments, etc.
The difference between the three
Scratching and pulling are the same process. The equipment used is a brushing machine. A steel needle roller is used to pull out the microfibers from the fabric yarn. Creates a fuzz effect on the surface. Specific products include flannel, silver hydroxyl cloth and the like. The napping process is also called "raising".
The equipment used in the sanding process is a sanding machine. Use sand leather, carbon, ceramic and other rollers to grind out the microfibers in the fabric yarns. Creates a fuzz effect on the surface. Compared to hair-pulling products. The brushed coat is short and dense. The hair feels very delicate. Specific products include brushed yarn card, brushed poplin, peach skin and so on. There are also some sanding products that don’t look very hairy. But the feel has been greatly improved.
The bristles are mainly a special process for corduroy. Because the fuzz of corduroy cuts the weft yarn of the surface tissue. Use brushing to break up the yarn and form a cohesive velvet strip. The equipment used is a brushing machine. Generally equipped with 8 to 10 hard brushes and 6 to 8 soft track brushes. Thick corduroy also needs to be brushed afterwards. In addition to hard and soft brushes, the rear brushing machine is also equipped with a wax plate. Wax the pile at the same time as you brush it. The corduroy strips are shiny. Therefore, the bristle brushing machine is also called a waxing machine.