A kind of light calcium coated fiber filler for papermaking and preparation method and application thereof

A fiber filler and coating technology, applied in the field of papermaking, can solve the problems of high concentration of white water, low retention effect, influence of paper strength, etc., and achieve the effect of reducing the concentration of white water, saving the consumption of water, and improving the tensile strength

Active Publication Date: 2019-03-22
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems existing in the above-mentioned existing papermaking technology "the white water concentration is high after the traditional filler is added, the retention effect is low, and the strength of the paper is greatly affected by the increase in the amount of the filler"

Method used

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  • A kind of light calcium coated fiber filler for papermaking and preparation method and application thereof
  • A kind of light calcium coated fiber filler for papermaking and preparation method and application thereof
  • A kind of light calcium coated fiber filler for papermaking and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051]Example 1 Preparation of Light Calcium Coated Fiber Filler for Papermaking

[0052] Step 1: Make the pulp slurry into coniferous pulp: hardwood pulp = 1:4 pulp, and a mixed pulp with a beating degree of 400SR. Prepare 5kg of pulp slurry solution with a pulp concentration of 0.8%, and add them to the reaction kettle in turn Add 1g of polyamide epoxy resin solution with a concentration of 5%, 16.5g of a polyacrylamide solution with a concentration of 0.3%, and 5g of a cationic starch solution with a concentration of 0.8%, and stir for 20min at a speed of 450r / min to make it mix uniform.

[0053] Step 2: Add 500g of calcium hydroxide solution with a solid content of 20% to the fiber mixing component in step 1, the rotation speed is 500r / min, the pressure is 0.3Mpa, stir for 30min to make it evenly mixed, and drop to normal pressure, The rotating speed is 300r / min.

[0054] Step 3: Infuse gas with a carbon dioxide concentration of 45%, and fully carbonize at about 18°C±2°C...

Embodiment 2

[0055] Example 2 Preparation of Light Calcium Coated Fiber Filler for Papermaking

[0056] Step 1: Make the pulp slurry into coniferous pulp: hardwood pulp = 1:4 pulp, a mixed pulp with a beating degree of 400SR, prepare 3.75kg of pulp slurry solution with a pulp concentration of 0.8%, and add it to the reaction kettle 1 g of polyamide epoxy resin solution with a concentration of 5%, 16.5 g of a polyacrylamide solution with a concentration of 0.3%, and 5 g of a cationic starch solution with a concentration of 0.8% were added successively, and stirred at a speed of 450 r / min for 20 min to make it well mixed.

[0057] Step 2: Add 500g of calcium hydroxide solution with a solid content of 20% to the fiber mixing component in step 1, the rotation speed is 500r / min, the pressure is 0.3Mpa, stir for 30min to make it evenly mixed, and drop to normal pressure, The rotating speed is 300r / min.

[0058] Step 3: Infuse gas with a carbon dioxide concentration of 45%, and fully carbonize ...

Embodiment 3

[0059] Embodiment 3 Dynamic water filtration experiment:

[0060] 3.1 Experimental samples:

[0061] Paste light calcium filler (brand name: SSTL-PCC GZ40) and fiber filler coated with light calcium produced by Dongsheng New Materials (Shandong) Co., Ltd. were selected.

[0062] 3.2 Experimental conditions:

[0063] Pulp ratio: softwood pulp 20% + broadleaf pulp 80% (mixed pulp beating degree 400SR)

[0064] Surabaya paste calcium filler, light calcium calcium coated fiber filler, CPAM retention aid;

[0065] Experimental process: slurry (75%) + filler (25%) + CPAM (200ppm);

[0066] (The above additions are dry / dry)

[0067] The design is based on the online concentration of 0.6% (paper material 3g is absolutely dry), the design speed is 750 rpm, the weighed pulp is stirred for 5 seconds, the filler is stirred for 5 seconds, then the retention aid is added and stirred for 5 seconds, and the drain valve is opened for 10 seconds. Take 100ml of white water under the net, te...

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Abstract

The invention discloses a light calcium-coated fiber filling for papermaking. The light calcium-coated fiber filling contains the following components in parts by weight: 100 parts of calcium hydroxide, 30-40 parts of paper pulp, 200-300 parts of carbon dioxide gas, 0.01-0.1 part of polyamide epoxy resin, 0.04-0.1 part of polyacrylamide and 0.03-0.05 part of cationic starch. The invention simultaneously discloses a preparation method and application of the light calcium-coated fiber filling. According to the light calcium-coated fiber filling for papermaking, the retention effect of the filling can be improved, the white water concentration can be reduced, a white water circulating system can be improved, the fixed quantity, ash content, tensile strength, retention rate and the like of finished paper can be increased, the use amount of fiber can be saved, and the cost can be lowered.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a light calcium coated fiber filler for papermaking, a preparation method thereof and an application in papermaking. Background technique [0002] With the development of papermaking technology, filler has become an essential component in most paper types and one of the basic components of papermaking. The purpose of adding fillers in the papermaking process is mainly to reduce costs, to obtain certain specific properties of paper or to improve its original properties. [0003] Inorganic fillers for papermaking mainly include calcium carbonate, talcum powder, titanium dioxide, calcium carbonate, etc. The addition of fillers can replace fibers, which can not only improve the performance of paper, but also reduce production costs, save pulp, reduce environmental impact, and reduce ecological environmental loads . However, with the increase of the amount of filler, on the one ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/70
CPCD21H17/29D21H17/52D21H17/55D21H17/675D21H17/70D21H17/74
Inventor 施晓旦杨迪杨文博廖秀驰
Owner SHANGHAI DONGSHENG NEW MATERIALS
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