Calender machines are essential finishing units used to enhance fabric aesthetics, hand feel, and surface properties. By passing textile material through a series of heated, rotating rollers under controlled pressure, they achieve effects like smoothing, glazing, embossing, or compacting. The configuration of rollers determines the specific finish.
3-Rolls Calenders
This is the most basic configuration, typically consisting of a stacked arrangement. One roller is usually a resilient bowl (e.g., paper or cotton), while the others are chilled iron. It is commonly used for simple ironing, flattening the fabric, and improving luster on woven goods.
4-Rolls Calenders
Often arranged in an inverted "L" or vertical stack, 4-roll calenders provide additional pressure and nip points. This configuration is effective for creating a higher gloss (friction effect) or for initiating more pronounced compacting of the fabric structure.
5-Rolls Calenders
Featuring multiple alternating soft and hard rollers, 5-roll calenders offer extended fabric contact time. They are ideal for achieving a superior, uniform flatness, enhancing opacity, and producing a soft "chintz" effect on various woven and knitted fabrics.
7-Rolls Calenders
The most sophisticated type, often configured with multiple nips in an "L" shape. 7-roll calenders are used for high-density finishing, such as producing extremely smooth, parchment-like surfaces or for heavy compacting of technical textiles. The multiple nips ensure maximum uniformity and a high-quality finish.
