Full oxidized starch surface sizing technique

Abstract

The invention relates to a surface sizing process with full oxidized starch. The starch is selected as raw material. The process steps comprise the production of oxidized starch glue, the preparation of the oxidized starch glue used for sizing, and the sizing of papers in a sizing machine. The invention adopts the full oxidized starch as the sizing agent of the paper surface to solve the problem of dry linting, and to achieve the purposes that the consumption of the paper fiber is decreased, the glue making process is simplified, the labor intensity is lightened, and the printing performance and the printing intensity of the paper surface are enhanced.

Description

【Technical field】 [0001] The invention belongs to the field of papermaking industry, and relates to a surface sizing process of fully oxidized starch coated with sizing liquid on the surface of double-adhesive printing paper for improving the printing performance and printing strength of the paper surface. 【Background technique】 [0002] There are many types of surface sizing agents used in the paper industry, which can be classified according to the source of chemicals: natural polymer surface sizing agents and synthetic polymer surface sizing agents. The more commonly used surface sizing agents are: [0003] Natural polymer surface sizing agent: cationic starch, anionic phosphate starch, hydrogen alkyl starch, dialdehyde starch, acetate starch, enzyme-converted starch, acid-thinned starch, animal glue, modified cellulose, alginate etc.; synthetic polymer surface sizing agents include: polyvinyl alcohol (PVA), polyacrylamide (PAM), polyurethane, etc. [0004] At present, i...

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Problems solved by technology

[0004] At present, in the production of double-adhesive printing paper, most of the surface sizing processes used are the preparation of natural polymer surface sizing agents and synthetic polymer surface sizing agents according to a certain process ratio. For example, according to the weight ratio: cationic Starch: polyvinyl alcohol (PVA): surface enhancer (TSI) = 78: 16: 10, the weight percentage concentration of glue solution is 3-4%, and sizing temperature is 50-80 ℃, the preparation of this sizing agent The blending process is complicated and the workload is heavy. First, cationic starch glue and polyvinyl alcohol glue should be prepared in their respective glue barrels, and then filtered through an 80-mesh filter. Mix and prepare the surface sizing agent in the bucket, then pump it to the storage tank for storage, and finally pump it to the paper sizing machine to sizing the paper according to the needs of the paper type

There are many human-influenced factors in the glue-making agent prepared by this glue-making process, the glue concentration is unstable, the worker's operation intensity is high, when the paper is glued, the amount of glue applied is unstable, and the paper is processed in the printing factory. During printing, hair loss and powder loss often occur, and the surface printing strength of the paper is poor

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