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Pulp, pulp manufacturing method, body paper and papermaking method

A technology of pulp and pulp, which is applied in the field of pulp, base paper and papermaking, and can solve the problems of low filler retention rate, inability to fully exert the short fiber adsorption force, and inability to exert the strength of long fiber paper, etc.

Inactive Publication Date: 2012-12-12
GOLD EAST PAPER JIANGSU
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  • Summary
  • Abstract
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Problems solved by technology

[0003] In the existing papermaking process, the different pulps after beating are usually mixed, then the filler is directly added, and then other additives are added, and the different pulps after beating are not separated, so that the fiber raw materials with different lengths are mixed Together with fillers, it can neither give full play to the advantages of long fibers that can improve the strength of paper, nor can it fully exert the effect of better adsorption of short fibers. The strength of paper produced by this kind of pulp and the retention of fillers low rate

Method used

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  • Pulp, pulp manufacturing method, body paper and papermaking method

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preparation example Construction

[0029] The technical solution also provides a pulp preparation method comprising the above steps (1) to (7). Of course, those skilled in the art can understand that the above step (7) is not a necessary step.

[0030] The technical solution also provides a kind of pulp prepared by the pulp preparation method above, the pulp includes fillers, short fibers with a length less than or equal to 180 microns and long fibers with a length greater than 180 microns, and the fillers with a mass content of more than 60% are adsorbed on Short fiber surface.

no. 1 example

[0032] The first embodiment: 100g dry weight of hardwood chemical pulp through beating is diluted to 0.5% mass concentration, filtered through an 80 mesh screen, the filtrate is collected in a bucket, and the supernatant is poured out after the filtrate is precipitated, and concentrated Finally, get short fiber slurry with a mass concentration of 5%, add filler light calcium carbonate, the absolute dry weight is 10g, stir evenly, then add 2g of retention aid, the retention aid is 0.2% cationic polyacrylamide , stir well, and mix for 45 minutes. Mix the short-fiber slurry with the long-fiber slurry sieved out of the sieve, and then add 25g of a reinforcing agent, which is cationic starch with a mass concentration of 4%, mix evenly, and then add 8g of cationic polyacrylamide with a concentration of 0.2%, Stir evenly and make slices. For comparison, a blank sample was carried out at the same time, that is, according to the existing papermaking method, 10 g of light calcium carbo...

no. 2 example

[0034] The second embodiment: the mass ratio of softwood chemical pulp: hardwood chemical pulp=30:70 mixed slurry dry weight 80g through beating is diluted to 0.5% mass concentration, filtered by 80 mesh screens, and the filtrate Collect it in a bucket, pour off the supernatant after the filtrate is precipitated, and after concentrating, obtain a short fiber slurry with a mass concentration of 4.5%, add 10g of filler light calcium carbonate dry weight, stir evenly, and then add retention aid 1.6g, the retention aid is a cationic polyacrylamide with a mass concentration of 0.2%, stir evenly, and mix for 30 minutes. Mix the treated short-fiber pulp with the sieved long-fiber pulp, then add 20 g of reinforcing agent, which is cationic starch with a mass concentration of 4%, stir evenly, and then add cationic polypropylene with a mass concentration of 0.2% Amide 6.4g, stir evenly, make tablets. For contrast, carry out a blank sample simultaneously, promptly according to existing ...

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Abstract

A pulp manufacturing method includes the steps of: filtering pulp with a screen of 80-200 meshes, and collecting short fiber size filtrate and filtered long fiber size, wherein the length of the short fiber in the short fiber size filtrate is smaller than or equal to 180 microns, and the length of the long fiber in the filtered long fiber size is larger than 180 microns; concentrating the short fiber size to enable the concentration of the short fiber size be 1%-10%; filling filler and retention aid in the concentrated short fiber size filtrate to form short fiber size; and mixing the short fiber size with the filtrated long fiber size to obtain the pulp, wherein 60% quality content of filler is absorbed on the surface of the short fiber. By means of the manufacturing method, retention rate of paper filler is improved, and simultaneously various strength indexes of paper are improved. The invention further provides the pulp, a papermaking method and body paper.

Description

technical field [0001] The invention relates to a papermaking process, in particular to a pulp, a preparation method of the pulp, base paper based on the pulp preparation method and a papermaking method. Background technique [0002] In the papermaking process, in order to improve the optical performance indicators such as smoothness and opacity of the paper, fillers, such as light calcium carbonate, heavy calcium carbonate or talcum powder, etc. are usually added to the pulp. Therefore, fillers are important in pulp. The second largest raw material except slurry. [0003] In the existing papermaking process, the different pulps after beating are usually mixed, then the filler is directly added, and then other additives are added, and the different pulps after beating are not separated, so that the fiber raw materials with different lengths are mixed Together with fillers, it can neither give full play to the advantages of long fibers that can improve the strength of paper,...

Claims

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Application Information

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IPC IPC(8): D21H21/10D21H17/67
Inventor 郝妮王仁荣张明陈剑
Owner GOLD EAST PAPER JIANGSU
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