Many domestic paper manufacturers do not include themselves in the paper industry, but regard themselves as consumer goods production companies.
The properties of household paper products mainly include softness, strength, appearance, absorbency and price, because this industry is welcomed by consumers, therefore, no one can deny the fact that papermaking technology promotes the improvement of product quality.
In recent years, the development of new technologies has helped manufacturers improve product quality and meet consumer demand.
The remarkable improvement of the production process has made the ATD, which has a history of nearly 50 years, rejuvenate.
In the past ten years, the production capacity of wearing breathable drying equipment has increased. Most of the household paper machines installed in North America use breathable drying technology.
The traditional toilet paper yank drying section is composed of Yank drying cylinder and hot air cover.
The moisture of the paper web diffuses to the surface of the paper web and is removed by the exhaust fan. Adopting the breathable drying technology, the hot air is not removed from the surface of the paper, but through the paper, and then through the cylinder blanket into the breathable drying cylinder.
Some air-permeable dry toilet paper machines adopt the combination of ordinary yank drying section and air-permeable drying section, while some only adopt air-permeable drying equipment.
The reason why the breathable drying technology is adopted more and more is to improve the characteristics of the product, reduce the difference in product quality and reduce the cost.
The products produced by air permeability drying have better absorbency than those produced by General drying under the condition of reducing the quantity. However, it consumes a lot of energy to wear breathable and dry, and because the quantity is reduced, the fiber is saved, and the energy consumption is made up accordingly.
The benefits of high-tech air-permeable drying cylinders for household paper are:
the open area of the cylinder surface reaches 95%;
there is air flow in the transverse direction of the cylinder surface, and the temperature is adjusted evenly;
high evaporation rate of water;
the production speed can reach 2200mpm, the copy width can reach 1000, and the diameter of the cylinder can reach 5400.
TAD technology can endow domestic paper with softness and high pine thickness.
According to the introduction of fleisner, a machinery manufacturing company of EgeIs-bach in Germany, TAD technology was once adopted in the United States for a period of time, but it has been developed in Europe and is expected to be transferred to Asia.
Fleissner has signed cooperation agreements with major paper machine manufacturers to provide a full set of soft toilet paper equipment. Fleissner has provided more than 40,000 TAD drying cylinders to the world.
Toschi, another machinery manufacturer, also sells TAD toilet paper machine, which adopts the technology transferred by Procter & Gamble, a global toilet paper machine manufacturer.
As TAD can produce very soft, loose and thick paper, its investment cost and high energy consumption should be considered, which is reminded by VoithPaper of Heidenheim in Germany.
The company has developed a method to replace TAD, called TissueFlex, which is said to improve the softness and thickness of paper and is more economical. This process is used in the yank type drying cylinder with boot type press.
The first toilet paper machine using industrial TissueFlex was successfully operated in the Americas. The equipment was installed in the mogidaicruzes factory in Sao Paulo, Brazil.
Before the installation of this equipment, two presses are installed on the yank dryer of the paper machine, and the speed is opened to 1600mpm. After adopting this new process, at the same speed, the same effect can be achieved by using only one press on the Yang Ke dryer.
After TissueFlex is driven, the thickness of the paper is increased by 20%, the softness is greatly improved, and the fiber saving is estimated to be over 5%.
In recent years, advanced household paper technology has emerged continuously, resulting in several new household paper machines.
For example, RecardSPA, a European manufacturer of household paper, is installing a new paper machine in Italy's CartieraPartenope factory, which will probably produce 140 tons of household paper per day.
The factory has two production lines for preparing pulp, one for producing virgin pulp and the other for producing waste pulp, which are then mixed for use. The new paper machine is CrescentFormer, with a maximum speed of 1800 m/min and a width of 3250.
The paper machine is equipped with an efficient air cover, a vacuum squeezing roller with a diameter of 1040mm, a blind hole squeezing roller with a diameter of 750mm, and a yang Ke dryer with a diameter of 5.4m. The paper machine is also equipped with four unwinder with a diameter of 2500mm and one slitting machine and rewinder.
As household paper has been produced by recycled fiber, the recent development of technology has prompted the use of a higher proportion of waste paper production.
This makes the waste paper recycling and pulp preparation system bear more burden.
The secondary fiber system of domestic paper factory must be able to work at higher concentration and higher efficiency.
For example, ComerSpa company, which provides a complete set of secondary fiber treatment system for paper mills, has developed a Cyberscreens production line suitable for screening recycled pulp and original pulp under high concentration.
These screening equipment can try to remove plastic, stickies and polyester from secondary fibers.
This Corner sieve can provide higher throughput and screening efficiency through its internal rotor.
This sieve uses a narrow sieve plate with a width of 3% and a circular sieve plate with a diameter of 4%, and can work at a concentration of.
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