纸浆和造纸工业

主要是四种成分用作纸浆的原料

1. 废纸被回收以制作纸浆
2. 锯末升起以制作纸浆
3. 棉或其他天然纤维用于制作纸浆
4. 树日志基于“增大化现实”技术e the most commonly used to make pulp

机械和化学方法都可用于将木原木转化为纸浆。

In the mechanical process, Chopped wood logs are tumbled inside huge drums to remove the bark. This debarked wood is then grinded between huge revolving slabs to make pulp. The pulp is then filtered to remove any foreign particles.

在化学过程中，Debarked Wood被切成小木屑。将这些木屑送入大型消化器，以压力在水，钠，氢氧化钠和硫酸钠溶液中烹饪。在该溶液中烹饪的一些压力烹饪后，木材芯片溶于纸浆中。

然后在一个名为“跳动”的过程中，纸浆被送入并挤压。可以在该阶段添加二氧化钛等各种填料。这些添加剂确定了成品纸的颜色，不透明度和其他此类品质。在这个阶段，纸张的吸收能力也在称为施胶的过程中，涉及添加细粘土，树脂或淀粉。

This pulp is then pumped into large automated papermaking machines. In this machine, the pulp is placed on a moving belt of fine mesh screening. Pulp on the belt is squeezed through a series of rollers while the suction device is used to remove excess water from the pulp.

Next in the press section of the machine, the pulp is pressed between rollers and wood felt. The paper then passes through a series of heated cylinders to remove the remaining water.

最后，本文缠绕成大卷轴以进行进一步加工。纸张是光滑的，并通过称为日历的滚筒压实，纸张上的特定所需的涂抹饰面，无论是暗淡的还是柔软，光泽或哑光饰面。进一步以化学或颜料涂层形式的形式加入到纸张的表面上，可以在称为超级日历分层的过程中添加光泽，然后将纸张切成所需尺寸。