Now, the quality of the test liner, which uses waste paper as the main raw material, is getting better and better, and the grammage can also be greatly reduced. What is the reason? The papermaking experts explained that this was mainly due to the improvement of paper machine equipment and the improvement of the level of papermaking technology.
Nowadays, the paper machines that produce linerboard paper generally use a long wire machine and are equipped with hydraulic headboxes. This type of headbox can control the dilution of the slurry. It has a wide nip press and a SymBelt type in the press section. The shoe press is equipped with an Optisonft soft calender after the drying section. The use of these devices not only improves the mechanical properties of the paperboard, such as burst strength and ring pressure, but also improves the surface quality of the paperboard.
Even in the past, the web former used in the production of tissue paper was also used for the production of packaging paperboard. In addition to the improvement of the paper removing machine, there has been a great improvement in pulp preparation in recent years. The Voith Sulzer company has provided the name MET (Most Efficion Technology's high-tech, specialized for the production of packaging paper, pulp (pulp board or waste paper) is first dewatered in the TwinPulper pulper, waste is excluded from the slag discharger and drum screener. The slurry is further purified by a Protector system, a Fibersorter aperture filter, and a weight purifier, which remove the sticky material, and then subjected to multi-stage screening to separate the long fibers and the short fibers and then send them into the head box to deepen the slurry. Purification improves the running performance and processing performance of the paper machine, and keeps the product quality stable.
Also worth mentioning is Valment's CaddeBelh technology for cardboard drying. Although only two paper mills are currently in use, it is a very promising technology. Using CondeBelt drying technology, some new varieties of cardboard can be made, which have good performance in box processing. The linerboard produced from waste paper has the same edge compressive strength (ECT) and kraft linerboard (manufactured with the raw fiber pulp), and the printing performance is greatly improved. The main performance is that the printed image is clear and the ink consumption is relatively high. low.
After the corrugated cardboard was made of CondeBelt dry cardboard, the ECT strength was increased by 30%, and the compressive strength of the carton was increased by nearly 40%, which can meet the market's low quantitative and high strength requirements.
In terms of technology, the production of white liner board has been greatly improved, reflected in two aspects: First, the use of carbon dioxide nanoparticle technology to form a complex retention / water filtration system, and second, the implementation of a high retention rate of AKD Alkaline sizing, which raises the carbonate level. This improvement has led to the production of alkaline cardboard for the production of cardboard. This alkaline papermaking is mainly used for the surface layer, and sometimes also for the surface layer and the bottom layer. Nanoparticle technology not only improves the quality of cardboard, but also contributes to environmental protection and cost reduction.
Nowadays, the paper machines that produce linerboard paper generally use a long wire machine and are equipped with hydraulic headboxes. This type of headbox can control the dilution of the slurry. It has a wide nip press and a SymBelt type in the press section. The shoe press is equipped with an Optisonft soft calender after the drying section. The use of these devices not only improves the mechanical properties of the paperboard, such as burst strength and ring pressure, but also improves the surface quality of the paperboard.
Even in the past, the web former used in the production of tissue paper was also used for the production of packaging paperboard. In addition to the improvement of the paper removing machine, there has been a great improvement in pulp preparation in recent years. The Voith Sulzer company has provided the name MET (Most Efficion Technology's high-tech, specialized for the production of packaging paper, pulp (pulp board or waste paper) is first dewatered in the TwinPulper pulper, waste is excluded from the slag discharger and drum screener. The slurry is further purified by a Protector system, a Fibersorter aperture filter, and a weight purifier, which remove the sticky material, and then subjected to multi-stage screening to separate the long fibers and the short fibers and then send them into the head box to deepen the slurry. Purification improves the running performance and processing performance of the paper machine, and keeps the product quality stable.
Also worth mentioning is Valment's CaddeBelh technology for cardboard drying. Although only two paper mills are currently in use, it is a very promising technology. Using CondeBelt drying technology, some new varieties of cardboard can be made, which have good performance in box processing. The linerboard produced from waste paper has the same edge compressive strength (ECT) and kraft linerboard (manufactured with the raw fiber pulp), and the printing performance is greatly improved. The main performance is that the printed image is clear and the ink consumption is relatively high. low.
After the corrugated cardboard was made of CondeBelt dry cardboard, the ECT strength was increased by 30%, and the compressive strength of the carton was increased by nearly 40%, which can meet the market's low quantitative and high strength requirements.
In terms of technology, the production of white liner board has been greatly improved, reflected in two aspects: First, the use of carbon dioxide nanoparticle technology to form a complex retention / water filtration system, and second, the implementation of a high retention rate of AKD Alkaline sizing, which raises the carbonate level. This improvement has led to the production of alkaline cardboard for the production of cardboard. This alkaline papermaking is mainly used for the surface layer, and sometimes also for the surface layer and the bottom layer. Nanoparticle technology not only improves the quality of cardboard, but also contributes to environmental protection and cost reduction.