Multifunctional macromolecule paper making promoter and preparation method thereof

A papermaking aid and polymer technology, which is applied in the field of multifunctional polymer papermaking aid and its preparation, can solve the problems of low transverse ring compression index, poor quality of corrugated base paper, etc., so as to improve dry-wet tensile strength, improve Ring pressure strength, the effect of improving water filtration performance

Inactive Publication Date: 2008-07-23
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method that can be applied in actual production to improve the dry and wet tensile strength and ring compressive strength of corrugated base paper and the disadvantages of poor quality in the production of corrugated base paper from recycled pulp, especially the low transverse ring pressure index. Preparation method of papermaking auxiliary agent with drainage and retention performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Add 5 kilograms of AM-ST emulsion with a solid content of 30% in the reaction kettle, and at a reaction temperature of 5°C, add 12 kilograms of available chlorine as 4.3% sodium hypochlorite aqueous solution and 7.4 kilograms of 40% sodium hydroxide aqueous solution while stirring , reacted at 5° C. for 7 hours to obtain light yellow multifunctional polymer papermaking auxiliary emulsion (abbreviated as AMST-CA05).

[0016] Add AMST-CA05 to recycled corrugated pulp at 0.5% (both are solid calculations), and the measured paper enhancement effect and drainage and retention effects are shown in Table 1 and Table 2:

[0017] Table 1 Paper enhancement effect of AMST-CA05

[0018] Quantitative

(g / m 2 )

dry tensile index

(Nm / g)

wet tensile index

(Nm / g)

ring pressure index

(Nm / g)

No paper additives added

Add paper additives

127

130

10.52

14.41

0.32

0.88

5.73

8.32

...

Embodiment 2

[0022] Add 5 kg of AM-ST emulsion with a solid content of 30% in the reaction kettle, and add 10.5 kg of available chlorine as 4.3% sodium hypochlorite aqueous solution and 6.3 kg of 40% sodium hydroxide aqueous solution while stirring at a reaction temperature of 25°C , reacted at 25°C for 2.5 hours to obtain a light yellow emulsion (abbreviated as AMST-BA25).

[0023] AMST-BA25 was added to the recycled corrugated pulp at 0.5% (both solid calculations), and the measured paper enhancement effect and drainage and retention effects are shown in Table 3 and Table 4:

[0024] Table 3 Paper enhancement effect of AMST-BA25

[0025] Quantitative

(g / m 2 )

dry tensile index

(Nm / g)

wet tensile index

(Nm / g)

ring pressure index

(Nm / g)

No paper additives added

Add paper additives

128

130

10.83

13.96

0.35

0.81

5.98

8.91

[0026] Drainage aid and retention effect of table 4AMST-...

Embodiment 3

[0029] Add 5 kg of AM-ST emulsion with a solid content of 30% in the reaction kettle, and at a reaction temperature of 40°C, add 14 kg of available chlorine as 4.3% sodium hypochlorite aqueous solution and 15 kg of 40% sodium hydroxide aqueous solution under stirring , reacted at 40° C. for 50 minutes to obtain a yellow emulsion (AMST-DC40 for short).

[0030] AMST-DC40 is added to recycled corrugated pulp in an amount of 0.5% (both solid calculations), and the measured paper enhancement effect and drainage and retention effects are shown in Table 5 and Table 6:

[0031] Table 5 Paper enhancement effect of AMST-DC40

[0032] Quantitative

(g / m 2 )

dry tensile index

(Nm / g)

wet tensile index

(Nm / g)

ring pressure index

(Nm / g)

No paper additives added

Add paper additives

127

132

10.28

12.23

0.35

0.56

5.82

7.06

[0033] Drainage aid and retention effect of table 6AMST-DC...

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PUM

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Abstract

The invention relates to a paper making addition agent, in particular to a multifunction and macromolecule paper making addition agent and the preparation method, which is prepared by Hofmann reaction with the molar ratio of acrylamide styrene copolymer acrylamide link: sodium hypochlorite: sodium hydroxide=1: (0.5-1): (1-9). A quantitative sodium hypochlorite and sodium hydroxide solution are added while stirred in the reaction temperature of 0 DEG C to 45 DEG C; white or light yellow emulsion is obtained after 0.5 h to 8 h reaction, and just preserved at ambient temperature. The paper making addition agent is used for paper making; when the addition agent is added to a sizing agent, in particular to a regeneration corrugated paper pulp, the dry-wet tensile strength and ring crush strength of paper are significantly increased, meanwhile the aqueous of sizing agent is effectively improved, and the retention of micro-component is increased; the paper making addition agent can be used as the paper dry strength agent, paper wet strength agent, ring crush strength agent and retention-drainage agent for paper making, in particular to corrugated paper production.

Description

technical field [0001] The invention relates to the technical field of papermaking additives, in particular to provide a multi-functional high-efficiency compound with drainage and retention properties, and improved paper dry-wet tensile strength and ring compressive strength through the Hofmann reaction of acrylamide-styrene copolymer emulsion. Molecular papermaking auxiliary agent and its preparation method. Background technique [0002] In October 2007, the national industrial policy issued by the National Development and Reform Commission has clearly defined the paper industry as a key industry with sustainable development characteristics. The paper industry is also one of the few industries whose output growth rate exceeds the GDP growth rate in the past 10 years. It shows a good development prospect. However, in recent years, with the increase of waste paper utilization, the increase of papermaking speed and the reduction of fresh water per ton of paper and other chan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/36D21H17/65D21H17/64D21H21/10D21H21/18D21H21/20
Inventor 陈少平吴宗华
Owner FUJIAN NORMAL UNIV
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