Papermaking preparation method

Abstract

The invention discloses a papermaking preparation method which comprises the following steps: under the reaction temperature of 20-65 DEG C, dissolving sodium hydroxide and potassium persulfate in water, uniformly mixing, and reacting for 1-6 hours to obtain a pale yellow solution; adding modified starch with the concentration of 2-8% into the pale yellow solution, uniformly mixing, heating at 80-120 DEG C for 0.5-1h, and pasting to obtain a starch paste solution; adding the starch paste solution into pulp with the concentration of 2-7%, and uniformly mixing; adding the mixed pulp into polyanionic cellulose, and then extruding and concentrating by pulp extruding equipment, so as to enable the concentration of the pulp to be improved to 18-40%; and adding water into the concentrated mixed pulp to dilute, dispersing the pulp, and manufacturing paper. The papermaking preparation method disclosed by the invention remarkably enhances the drying strength and the tearing-resistance strength of the paper, remarkably improves the ring crush strength of the paper and the pulp drainage property, and improves the retention rate of superfine components.

Description

Technical field: [0001] The invention belongs to the technical field of papermaking technology and relates to a papermaking preparation method. Background technique: [0002] The National Industrial Policy issued by the National Development and Reform Commission in October 2007 has clearly defined the paper industry as a key industry with sustainable development characteristics. The paper industry is also one of the few industries whose output growth rate exceeds the GDP growth rate in the past 10 years, showing a good development prospect. [0003] Starch, the storage form of carbohydrates in green plants, is an important renewable and biodegradable natural resource with very important practical applications in the paper industry and other industries. Native starch produced from cereal and tuber crops is widely used in many industries. With the development of the paper industry, starch products are increasingly required to have specific functions, such as better film-form...

AI Technical Summary

Problems solved by technology

Cationic starch is currently the most widely used modified starch added to the wet end of the papermaking industry. It has the characteristics of high retention rate and good reinforcement effect, but it also has shortcomings. For example, when the conductivity of papermaking white water and the concentration of anionic garbage When it is high, the use effect becomes poor, and it needs to be heated and gelatinized before adding and kept warm within a certain temperature range, otherwise it is prone to aging and stratification and failure