- The fabric passing through the rollers of the calender is subjected to a very uniform pressure all along its width; if the rollers rotate at a different speed, a vigorous friction effect is generated. Steel rollers may be equipped in such a way to be heated from the inside by means of steam, circulating fluids or electrical power.The wavy engraving on the rollers give the effect as shown.
-
- The fabric passing through the rollers of the calender is subjected to a very uniform pressure all along its width;if the rollers rotate at a different speed, a vigorous friction effect is generated. Steel rollers may be equipped in such a way to be heated from the inside by means of steam, circulating fluids or electrical power.The rollers coated with paper/wool, containing 45-50% of wool, feature good elasticity and excellent resistance to wear and are suitable for a wide variety of applications; they can also be used in embossing calendering units.Rollers made of paper/cotton, are used almost in friction calenders and for treating hard fibres. Cotton rollers, featuring higher elasticity than the paperones, are mainly used for cotton and blends finishing and for a final full hand effect.