Nowadays, the production of dry press forming ceramic tile is continuous assembly line production, the powder becomes raw bad through the press forming, raw bad after drying kiln drying, and then after glazing, multiple printing and other processes before entering the kiln firing, because the raw billet in the kiln firing before going through multiple processes, in the production line conveyor belt needs to go through a long distance, if the raw billet strength is not good it is easy to appear The strength of the bad body is very important, so it can be said to a certain extent on the product viability and quality of production has a decisive role, especially the porcelain tile bad material formula in the barren raw materials more raw bad strength problems, then by choosing a suitable bad body enhancer to improve the strength of the bad body is particularly important, and sodium lignosulfonate is a more ideal choice.
In the absence of reinforcing agent, the bonding between ceramic blank particles mainly relies on van der Waals force, after adding the billet reinforcing agent, the bonding mechanism between ceramic blank particles depends on the molecular structure of the reinforcing agent, and sodium lignosulfonate, as an organic polymer compound with sufficient chain length, can bridge between ceramic blank particles, produce cross-linking and form an irregular mesh structure, and form a cohesion that The ceramic particles are tightly wrapped. Before fracture of the blank, part of the load applied to the blank is borne by the long chain of the reinforcing agent molecules, and because the molecular chain has many single bonds that can be rotated internally, this single bond that rotates internally makes the polymer chain has strong flexibility and elasticity, thus increasing the strength of the blank.
Due to the high carbon content of sodium lignosulfonate, the excessive amount used will have some effect on the firing black center of the bad body. The amount of sodium lignosulfonate added in the production of ceramic tile is 0.1~0.3%, which has a significant effect on the strengthening of the billet and can reduce the cracking and breaking of the product in the production process.