1 Ordinary calendering: usually consists of two metal rolls and two soft rolls to form two hard rolling points. After rolling, the fabric can reach the general gloss requirement. It can also be combined with a plurality of soft and hard rolls.
2 laminated calendering: At the same rolling point, multiple layers of fabric are subjected to rolling. The layers of the fabric have mutual entanglement effect, which makes the fabric have clear texture, soft handfeel and soft gloss, and is often used for calendering of poplin fabrics. The equipment usually consists of 5 to 7 rolls. Two of them are hard rolls that can be heated and the rolling temperature is from room temperature to 50 °C. The method of forming the lamination is to first pass the fabric through the rolling point between the rolls in a conventional order, and after the fabric is out of the last rolling point, it is passed back through the guide frame and then passed through the respective rolling points, so that it is repeated 3 to 6 times, and the rolling point is There are 3 to 6 layers of fabric.
3 Friction calendering: The equipment consists of a soft roll and two hard rolls. The soft roller is in the middle. The upper hard roll is a highly polished friction roll that forms a point of friction with the soft roll. The lower and soft rolls below form a hard rolling point. The fabric is first passed through the hard rolling point and then through the rubbing point. Both the friction roller and the soft roller are active rollers, but the surface speed of the friction roller is larger than the surface speed of the soft roller, so that the surface of the fabric is rubbed to produce a clear luster, the yarn is flattened, and the gap between the warp and weft yarns is also significantly reduced. The ratio of the surface speed of the friction roller to the speed of the fabric is up to 4:1, and the usual speed ratio is 1.3 to 2.5:1. The temperature of the rubbing rolls is usually from 100 to 120 °C, and the water content of the fabric is from 10 to 15%.
4 electro-optic: the electric heating of the rolls is called electro-optic light. The surface of the metal roll of such a device is engraved with a dense oblique line of 50 to 200 pieces/cm, which is called an electro-optic roller. The electro-optical roller and the soft roller form a rolling point, and are rolled at a temperature of 160 to 180 °C to form a fine parallel oblique line on the surface of the fabric, reflecting a pleasing gloss. The density and angle of the fine slashes are matched with the structure of the fabric, the twist of the yarn, and the twisting direction to achieve excellent results.
5 Partial calendering: The rolling point is composed of steel enamel and soft roller engraved with a stencil pattern, and the fabric is partially flattened or rolled out under the hot rolling condition to give a glossy pattern.
