为克服传统油加热系统的缺点,采用激光作为纸幅的加热源,利用纸幅对激光穿透的阻隔效应和激光对纸页组分选择性加热的特性,使得激光对纸幅的加热只停留在纸幅的表面,从而当纸幅通过随后的压区时,压光辊对纸页挤压产生的纸张厚度方向上的塑性变形将只限于纸张表面温度高于塑化点的区域,而其他区域将只产生弹性变形。当纸幅离开压区后,弹性变形将得以恢复,使得压光处理后纸张的松厚度可保持在较高的水平,因而可较好地实现温度梯度压光理念。如图1所示,新型纸张压光装置包括激光发生器、 In order to overcome the shortcomings of the traditional oil heating system, the laser is used as the heat source of the paper web, the barrier effect of the paper web to the laser light penetration and the property of the laser to selectively heat the paper sheet components are utilized, so that the laser heats the paper web only At the surface of the web, the plastic deformation in the thickness direction of the sheet caused by the calender roll pressing against the sheet will be limited to the area where the surface temperature of the sheet is higher than the plasticizing point, when the web passes through the subsequent nip, while the other The area will only have elastic deformation. When the web leaves the nip, the elastic deformation will be restored so that the bulk of the paper after calendering can be kept at a high level, so that the temperature gradient calendering concept can be better realized. As shown in Fig. 1, the new paper calendering device includes a laser generator,