Papermaking method capable of inhibiting decay of plant fibers

A plant fiber and fiber decay technology, applied in the field of papermaking, to achieve the effects of stable quality, good environmental friendliness and simple production process

CN104179069AActive Publication Date: 2014-12-03WUHAN IND TECH RES INST OF GEO RESOURES ENVIRONMENT CO LTD
4 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2014-12-03

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a papermaking method capable of inhibiting decay of plant fibers. The method comprises the steps of pulping a wood pulp board, and grinding into thick liquid to obtain pulp A; preparing fiber decay inhibitor suspension liquid in a preparation tank; mixing the pulp A and the prepared suspension liquid at high speed in a mixing tank to obtain evenly mixed pulp B; washing the pulp B to obtain pulp C; screening the pulp C, purifying, and obtaining pulp D before the pulp C enters a former copy tank; enabling the pulp D to enter a pressure screen after the pulp D passes through a white water bucket and a slushing pump; removing a fiber bundle and impurities in the pressure screen to obtain pulp E, and feeding a cationic polyacrylamide (CPAM) retention aid into the pulp E to obtain pulp F; enabling the pulp F to enter a flow box for distributing the pulp, and carrying out dehydration at a net part to form a wet paper web; carrying out squeezing, primary drying, surface sizing and post-drying; forming a mother roll at a roll paper part, and carrying out rewinding cutting to obtain a product with the needed specification. The method has the advantages that a production technology is simple, the inhibition of the fiber decay can be foundationally realized, the inhibiting effect is lasting, added auxiliary agents are good in environmental friendliness, and the like.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a papermaking method for suppressing plant fiber decay, and belongs to the technical field of papermaking. Background technique

[0002] With the rapid development of my country's national economy, the paper industry has also developed rapidly. At present, my country's paper and cardboard production has leapt to the first place in the world. However, at the same time of rapid development, my country's paper industry is also facing many problems, mainly reflected in the shortage of raw materials, high energy consumption and severe environmental pressure. Compared with native plant fiber, regenerated plant fiber has a wide range of sources, and its pulping process is simple, energy consumption is low, and the amount of chemical additives is less, which can significantly reduce production costs and reduce the pressure of wastewater treatment, so its application range continues to expand , the current proportion in papermaking fib...

Examples

Embodiment 1

[0034] Embodiment 1: the present invention provides a kind of papermaking method that suppresses plant fiber decay, as figure 1 shown. Papermaking method of the present invention is specifically operated as follows:

[0035] Step (1), first pulping and refining the wood pulp board to obtain slurry A; the concentration of the slurry A is 3.5%. The wood pulp board adopts bleached chemical wood pulp, wherein it is coniferous wood 50, Hardwood 50.

[0036] Step ⑵, prepare the fiber decay inhibitor suspension in the preparation tank; the fiber decay inhibitor component is Al(OH) 3 and Mg(OH) 2 , by mass percentage, the Al(OH) 3 40, Mg(OH) 2 60, added to water to prepare a suspension with a concentration of 6%.

[0037] Step ⑶, mix and stir the slurry A obtained in step ⑴ after refining treatment and the fiber decay inhibitor suspension prepared in step ⑵ in the mixing tank, and the two materials are: slurry A98, decay inhibitor 2. Mix and stir the above two materials in the ...

Embodiment 2

[0046] Embodiment 2: the present invention provides a kind of papermaking method that suppresses plant fiber decay, and its operation step is with embodiment 1: different is:

[0047]Step (1) medium wood pulp: adopt bleached chemical wood pulp, wherein coniferous wood: hardwood=60:40. The concentration of slurry A obtained after the pulp board is refined is 3.8%.

[0048] Fiber Decay Inhibitor: Al(OH) 3 :Mg(OH) 2 , the ratio of the two is 60:40, and it is added into water to form a suspension with a concentration of 8%.

[0049] The ratio of stock A and fiber decay inhibitor is 96:4.

[0050] The mixing and stirring speed is 2800r / min, and the stirring time is 40min.

[0051] The slurry C concentration after washing is 0.95%.

[0052] The added amount of CPAM is 0.25% of the absolute dry pulp mass.

[0053] The slurry F concentration was 0.6%.

[0054] In the sizing process, the sizing agent used is surface sizing starch, and the dosage is 2.6g / m 2 .

[0055] The stre...

Embodiment 3

[0058] Embodiment 3: the present invention provides a kind of papermaking method that suppresses plant fiber decay, and its operating steps are the same as embodiment 1: difference is: step (1) middle wood pulp: adopt bleached chemical wood pulp, coniferous wood: hardwood=37:63 . The concentration of the slurry A obtained after the pulp board is refined is 3.0%.

[0059] Fiber Decay Inhibitor: Only Al(OH) is used 3 , without Mg(OH) 2 , added to water to form a suspension with a concentration of 10%.

[0060] The ratio of pulp A and fiber decay inhibitor is 95:5.

[0061] The mixing and stirring speed is 3000r / min, and the stirring time is 45min.

[0062] The slurry C concentration after washing was 1.0%.

[0063] The added amount of CPAM is 0.4% of the absolute dry pulp mass.

[0064] The slurry F concentration was 0.8%.

[0065] In the sizing process, the sizing agent used is surface sizing starch, and the dosage is 3g / m 2 .