Introduction to papermaking process of paper machine

The paper machine is a complete set of equipment linked to the division of the pulp into the paper web, including the headbox, the wire section, the press section, the drying section, the calender, the paper reel, and the transmission section, Lubrication, heat recovery and other auxiliary systems. The wire that forms the wet paper web is the core of the paper machine, so the paper machine can be divided into fourdrinier paper machine, clamped paper machine and cylinder paper machine according to the structure of the wire.

The headbox is the equipment that sends the slurry of appropriate concentration to the network evenly and stably through the slurry distributor, rectifier, weir pool, weir plate nozzle and other components, also known as the headbox; the slurry is sprayed from the headbox to the copper After the web, a wet paper sheet is formed on the wire and dewatered; after that is pressing, that is, a mechanical method is used to squeeze out the moisture of the wet paper from the wire to increase the dryness of the paper and improve the surface properties of the paper. , Eliminate net marks and increase smoothness, tightness and strength; then enter the drying section to further dehydrate the wet paper after pressing, so that the paper shrinks, the fiber is tightly bonded and the strength is increased.

After the paper sheet from the drying section is calendered by the calender, the smoothness, gloss and tightness of the paper sheet can be improved, the thickness of the whole paper sheet can be consistent, and the air permeability can be reduced. Rolling into a paper roll completes the main process of papermaking. In order to meet different needs in the future, there are super calenders, rewinders, paper cutters, etc. behind the paper reel in the papermaking workshop.

The paper industry consumes a lot of raw materials, water, electricity and chemicals, and produces a lot of waste water and waste residue. Therefore, the future of paper machine will develop towards the use of a wide range of papermaking raw materials, reducing material and energy consumption in the papermaking process, and reducing environmental pollution.