Composition method for composite talcum powder

Abstract

The invention discloses a composite method for a composite talcum powder filler, the method comprises the following steps of: dispersing talcum powder into dispersing suspension with 1 to 50 percent mass concentration, after mixing evenly with macromolecular water solution with 1 to 30 percent mass concentration, mixing the talcum powder with acidic electrolyte solution, and stirring evenly; or adding fatty acid and mixing evenly, then mixing with the acidic electrolyte solution, and stirring evenly; after standing the stirred evenly liquid and removing an upper layer of clear liquid, a lower layer of white substance is the composite talcum powder filler. The composite method for the composite talcum powder filler can improve hydrophilicity of the talcum powder and fiber, increase amount of the talcum powder as well as strength of paper, the composite method for the composite talcum powder filler also has the advantages of improving filler levels, increasing paper brightness, reducing wastewater treatment load and further saving the using amount of the fiber.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a method for compounding compound talcum powder filler used in papermaking and filling process. Background technique [0002] Talc powder is a commonly used white filler and pigment for papermaking. At present, talc powder has a very large consumption in the entire paper industry filler market. Other main fillers include calcium carbonate and kaolin, which are the main minerals added in the papermaking process. . The main purpose of filling is to increase the opacity and whiteness, improve the printing performance of the paper, and reduce the production cost. It is an important step in the papermaking process. [0003] Now paper mills add talcum powder fillers directly into the slurry. Since fillers are minerals and lack binding force with fibers, retention aids need to be added to minimize the loss of fillers. Generally, the single-pass retention rate of talcum po...

AI Technical Summary

Problems solved by technology

Generally, the single-pass retention rate of talcum powder filler in the fourdrinier paper machine is about 15%, and the retention rate of white water after multiple reuses is only about 40%. A large amount of filler will flow away with water, which not only wastes raw materials, but also increases the water treatment load.

At the same time, there is no binding force between the talcum powder filler and the fiber, so it cannot be added too much, otherwise it will easily cause powder and hair loss after the paper is made, which will weaken the strength of the paper and reduce the quality of the paper.