# TYPE: Cultural Paper Making Line TIME: 2017-08-07
Paper making is to convert the pulp into even sheets. There are many ways to make paper, such as wet, dry, foam method.
Currently, wet papermaking is the main method, namely Pulp→beating→sizing→adding→filling→concentration→molding→pressing→drying and than→calendering→polishing→finishing→paper or paperboard.
By adding water resistant adhesive to the pulp or coating it on the surface of the paper, the paper obtains the ability to resist liquid diffusion and penetration.
The purpose of sizing is to change the surface energy of fibers to control the penetration of water into the paper.
Paper sizing is usually for the following purposes:
(1) requirements for final use. Such as liquid packaging, offset printing, wet food packaging, frozen poultry and agricultural products, shipment, stickiness, retention of water-based ink, etc..
(2) paper machine operation. Such as sizing, press glue retention, coating retention, calender, surface sizing, retention and so on.
(3) resist accidental wetting. Such as office paper, cereal or cosmetics packing boxes, grocery bags and so on.
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