Fiber and filler mixed enzymatic defibrination method

A technology of mixing enzymes and fibers, which is applied in the field of paper production, can solve the problems of paper quality decline, less cleaning, and continuous investment costs outweigh the gains, and achieve the effects of improving cohesion, improving paper quality, and improving tensile index

Active Publication Date: 2013-10-23
HAINAN JINHAI PULP & PAPER
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  • Abstract
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Problems solved by technology

In addition, the low-consistency refining method currently used by most factories in the industry cuts more fibers and less brooming.
[0004] Against the background above, many paper mills are making continuous efforts, especially in increasing the ash content of base paper, but after increasing the ash content, they often sacrifice paper strength, resulting in a decline in paper quality and lower product competitiveness, or by increasing the proportion of long fibers and Add dry strength agent to make up, but this method requires continuous investment cost may not be worth the candle

Method used

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  • Fiber and filler mixed enzymatic defibrination method

Examples

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Effect test

Embodiment 1

[0029] The fiber and filler mixed enzymatic refining technology of the present invention is used for refining bleached kraft pulp. The original freeness of the pulp is about 560ml, and the concentration of the loose pulp is 4.5%. After the loose pulp is completed, the pulp is directly transported to the pulp storage tank ( ), the refining enzyme (I) is transferred from the pulper to the pulp storage tank ( ) at the inlet of the transfer pump, the amount added is 200ppm, and the volume of the storage tank is 2000m 3 , under the output of 300 tons / day, in order to keep the refining enzyme (I) acting on the fiber (before entering the refiner) for 4 hours, it is necessary to maintain the slurry storage tank ( ) liquid level is about 50%; the filler (II) adopts GCC, and the particle size content of less than 2 μm is required to be between 60% and 65%. The amount of filler (II) added is 15%. Sent to the squeezer, the squeezer is a single-screw squeezer, its maximum output is 35...

Embodiment 2

[0033] Using the same slurry as in Example 1, its original freeness was about 560ml. Under the same conditions as in Example 1, the bulk concentration, the amount of refining enzyme and filler, and the squeezing concentration are all the same, and the power of the first high-consistency refining is changed to 750kw, so that the freeness of the pulp after high-consistency grinding is reduced to 460± 20ml, then diluted to 5% concentration and refined with a low consistency refiner, the final freeness is controlled within the range of 420±20ml.

[0034] After using this invention, compared with the two-stage low concentration and conventional addition of GCC used before, under the same 20% paper ash content, the tensile strength of the paper of this invention is 27% higher than the latter, and the cohesion is 42% higher than the latter. Under this effect, the factory can reduce the amount of long-fiber pulp or increase the ash content of paper, and the economic benefits are o...

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Abstract

The invention relates to a fiber and filler mixed enzymatic defibrination method which comprises the steps of high concentration and low concentration series beating, paste and filler premixed beating, and paste and beating enzyme premixed beating. Firstly, pre-treating fibers by beating enzyme, so as to enable the fibers to be soft and convenient to beat; secondly, adding fillers when concentrating the paste into a higher concentration through a press master; and conducting beating through a high consistency refiner. According to the method provided by the invention, fiber intensity is improved through three modes, tensile strength, bursting strength, folding endurance and cohesion of paper can be efficiently improved; identical paper strength can be maintained under the condition of improving 2 percent to 3 percent of paper ash, furthermore, beating energy consumption can be greatly decreased under the action of beating enzyme. Through the application of the method in a paper mill, macrofiber usage can be decreased, paper ash part can be improved, cost of a ton of paper can be greatly decreased, and product competitiveness can be improved.

Description

[0001] technical field [0002] The invention belongs to the technical field of papermaking production, and in particular relates to a fiber and filler mixed enzymatic refining method. Background technique [0003] In today's increasingly fierce market competition, continuously reducing production costs is the only way for an enterprise to achieve sustainable development. The pulp cost accounts for about 60%~70% of the total production cost of paper sheets or even higher, and is the main source of palm production costs. Compared with pulp, the unit price of fillers added to base paper is relatively low, only about half of the unit price of pulp. 10%, if the proportion of filler in base paper is increased while maintaining the paper strength recognized by the market, it will reduce the production cost of paper sheets and improve product competitiveness. In addition, the low-consistency refining method currently used by most factories in the industry cuts more fibers and less...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21D1/20
Inventor 翁浥程梁昌良
Owner HAINAN JINHAI PULP & PAPER
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