Pulping is to separate the fibers from the raw materials of trees, make fiber pulp, and then bleach; papermaking is to dilute the fiber pulp, shape, press, dry, and then make paper. Both processes discharge large amounts of wastewater. The wastewater produced by pulping is seriously polluted. The pollutant concentration in the wastewater discharged during pulp washing is very high, the BOD is as high as 10-36g/L, and it contains a lot of plant fibers, inorganic salts and pigments. The wastewater discharged from the bleaching process also contains a large amount of acid and alkali substances. The wastewater discharged from the paper machine contains a large amount of fibers and fillers and sizing materials added during the production process.

The softness of toilet paper is often increased by wrinkling the paper sheet. There are many raw materials for the manufacture of toilet paper, commonly used are cotton pulp, wood pulp, straw pulp, waste paper pulp and so on.

The main function of pulping equipment in the production line of the paper machine is very important. Shredded, continuously finer fibers, can be very good for the next production line of the paper machine.

Paper is one of the four great inventions in ancient China. As early as 105 AD, Cai Lun summed up the use of hemp since the Western Han Dynasty.

When the cutting resistance of the tissue paper cutter increases and the cutting sound changes obviously, it means that the blade has been blunt, and the blade grinding should be replaced in time.

Many domestic paper mills often encounter the phenomenon of drying cylinder sticking in the production process. This phenomenon may cause the paper surface to be not smooth enough, the wrinkles to be uneven in thickness, and in severe cases, it will cause holes or opaque spots, and sometimes have to