CN104562847A - Method for improving paper strength - Google Patents
Method for improving paper strength Download PDFInfo
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- CN104562847A CN104562847A CN201410787988.0A CN201410787988A CN104562847A CN 104562847 A CN104562847 A CN 104562847A CN 201410787988 A CN201410787988 A CN 201410787988A CN 104562847 A CN104562847 A CN 104562847A
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- paper
- strength
- pulp
- dry
- burst index
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Abstract
The invention discloses a method for improving paper strength. The method comprises the following steps: by taking 1g of hardwood kraft pulp with beating degree of 40 40 DEG SR as a fiber base material, adding 4mL of isoprene as a reaction monomer, 0.45g of copper bromide as a catalyst, and 50mL of N, N-dimethylformamide as a solvent, synthesizing at the temperature of 40 DEG C for 24 hours to obtain a modified pulp fiber, adding the modified fiber of which the content is 0 to 4% of the absolute dry amount of paper to original pulp and then making paper, and detecting the dry and wet tensile strength, the burst index and the ISO whiteness of the paper. According to the method provided by the invention, a small amount of modified fiber is added to the original pulp, the strength property of the made paper is obviously improved, and the addition amount does not affect the whiteness of the paper.
Description
Technical field
The present invention relates to pulping and paper-making field, especially a kind of method improving paper strength.
Background technology
Paper-making industry is one of important industry of China, and China in recent years Paper Industry Development is rapid, and paper making raw material belongs to situation of standing like the legs of a tripod.According to the measuring and calculating of Chinese papermaking association, current wood pulp usage quantity proportion accounts for 23% of raw material total amount, and non-wood pulp proportion accounts for 15%, and paper waste proportion accounts for 62%.Paper waste proportion constantly increases in recent years.This is due to China's timber resource shortage, the reason of especially macrofiber wood pulp shortage, thus has to utilize in a large number careless class and wastepaper as raw material and filler.In recent years, comparatively wood pulp is poor to use the intensity of the paper waste raw material that increasingly increases and careless class slurry; In addition, the increase of filler usage quantity also causes paper strength to decline.But the demand of people to top grade, light basis weight, slimming paper product significantly increases, the raising of paper strength seems important all the more.
Prior art cannot meet the demand of people to top grade, light basis weight, slimming paper product.
Summary of the invention
The present invention, in order to the problem of insufficient strength solving existing top grade, light basis weight, slimming paper product exist, provides a kind of method improving paper strength.Add a small amount of modified fibre in body paper slurry, the strength property of the paper of manufacturing paper with pulp improves successful, and addition can't impact the whiteness of paper.
The technical scheme that the present invention solves the problems of the technologies described above is as follows:
Improve a method for paper strength, operation steps is as follows:
1. get the broad-leaved wood sulphate pulp of 1g beating degree 40 ° of SR as fiber base material, add 4mL isoprene as reaction monomers, the cupric bromide of 0.45g is as catalyzer, 50mL N, dinethylformamide is solvent, synthesize after 24 hours at 40 DEG C, obtain modified pulp fibers, be kept in refrigerator for subsequent use.
2. getting the modified fibre content that step 1 obtains is 0 ~ 4% of paper oven-dry weight, adds in body paper slurry, then copy paper.
3. dry, the wet tensile (strength) of the paper that obtains of detecting step 2. and burst index and ISO whiteness.Detected result: dry tensile strength is 43 ~ 52N.m.g
-1, wet tensile (strength) is 1.6 ~ 2.3N.m.g
-1, burst index 3.5 ~ 3.9Kpa.m
2.g
-1, ISO whiteness 64%.
In above-mentioned steps 2, modified fibre addition is 2% of paper oven-dry weight, and the dry tensile strength of the paper of manufacturing paper with pulp is 52N.m.g
-1, wet tensile (strength) is 2.3N.m.g
-1, burst index 3.9Kpa.m
2.g
-1, ISO whiteness 64%.
Compared with prior art beneficial effect of the present invention:
Add a small amount of modified fibre in body paper slurry, the strength property of the paper of manufacturing paper with pulp improves successful, and addition can't impact the whiteness of paper.
Embodiment
Below in conjunction with embodiment, the inventive method is described in further detail.
Embodiment 1
A kind of method improving paper strength:
1. get the broad-leaved wood sulphate pulp of 1g beating degree 40 ° of SR as fiber base material, add 4mL isoprene as reaction monomers, the cupric bromide of 0.45g is as catalyzer, 50mL N, dinethylformamide is solvent, synthesize after 24 hours at 40 DEG C, obtain modified pulp fibers, be kept in refrigerator for subsequent use.
2. getting the modified fibre content that step 1 obtains is 0% of paper oven-dry weight, adds in body paper slurry, then copy paper;
3. dry, the wet tensile (strength) of the paper that obtains of detecting step 2 and burst index and ISO whiteness.
Modified fibre dosage is 0% of paper oven-dry weight, does not namely add modified fibre, and the dry tensile strength after the magma copy paper detected is 43N.m.g
-1, wet tensile (strength) is 1.6N.m.g
-1, burst index 3.5Kpa.m
2.g
-1, ISO whiteness 64%.
Embodiment 2
A kind of method improving paper strength:
1. identical with example 1 step 1.
2. getting the modified fibre content that step 1 obtains is 2% of paper oven-dry weight, adds in body paper slurry, then copy paper.
3. identical with example 1 step 3
Detect that the dry tensile strength of paper is 52N.m.g
-1, wet tensile (strength) is 2.3N.m.g
-1, burst index 3.9Kpa.m
2.g
-1, ISO whiteness 64%.Compared with starching the paper of manufacturing paper with pulp with body paper, strength property improves successful, the whiteness of paper is caused to not impacting.
Embodiment 3
A kind of method improving paper strength:
1. identical with example 1 step 1.
2. getting the modified fibre content that step 1 obtains is 4% of paper oven-dry weight, adds in body paper slurry, then copy paper.
3. identical with example 1 step 3
Detect that the dry tensile strength of paper is 46N.m.g
-1, wet tensile (strength) is 2.0N.m.g
-1, burst index 3.7Kpa.m
2.g
-1, ISO whiteness 64%.Compared with starching the paper of manufacturing paper with pulp with body paper, strength property improves successful, the whiteness of paper is caused to not impacting.
It should be noted that, what more than enumerate is only several specific embodiments of the present invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be had.All distortion that those of ordinary skill in the art can directly derive from content disclosed by the invention or associate, all should think protection scope of the present invention.All distortion that disclosed content directly derives or associates, all should think protection scope of the present invention.
Claims (2)
1. improve a method for paper strength, it is characterized in that, operation steps is as follows:
(1) broad-leaved wood sulphate pulp of 1g beating degree 40 ° of SR is got as fiber base material, add 4mL isoprene as reaction monomers, the cupric bromide of 0.45g is as catalyzer, 50mL N, dinethylformamide is solvent, synthesize after 24 hours at 40 DEG C, obtain modified pulp fibers, be kept in refrigerator for subsequent use;
(2) getting the modified fibre content that step (1) obtains is 0 ~ 4% of paper oven-dry weight, adds in body paper slurry, then copy paper;
(3) dry, the wet tensile (strength) of the paper that obtains of detecting step (2) and burst index and ISO whiteness, detected result: dry tensile strength is 43 ~ 52N.m.g
-1, wet tensile (strength) is 1.6 ~ 2.3N.m.g
-1, burst index 3.5 ~ 3.9Kpa.m
2.g
-1, ISO whiteness 64%.
2. a kind of method improving paper strength according to claim 1, is characterized in that, in described step (2), modified fibre addition is 2% of paper oven-dry weight, and the dry tensile strength of the paper of manufacturing paper with pulp is 52N.m.g
-1, wet tensile (strength) is 2.3N.m.g
-1, burst index 3.9Kpa.m
2.g
-1, ISO whiteness 64%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410787988.0A CN104562847A (en) | 2014-12-17 | 2014-12-17 | Method for improving paper strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410787988.0A CN104562847A (en) | 2014-12-17 | 2014-12-17 | Method for improving paper strength |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104562847A true CN104562847A (en) | 2015-04-29 |
Family
ID=53079864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410787988.0A Pending CN104562847A (en) | 2014-12-17 | 2014-12-17 | Method for improving paper strength |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104562847A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101529021A (en) * | 2006-10-25 | 2009-09-09 | 西巴控股有限公司 | A process for improving paper strength |
| CN103360550A (en) * | 2013-08-08 | 2013-10-23 | 中国科学技术大学 | Cellulose-graft-polyisoprene copolymer and preparation method thereof |
-
2014
- 2014-12-17 CN CN201410787988.0A patent/CN104562847A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101529021A (en) * | 2006-10-25 | 2009-09-09 | 西巴控股有限公司 | A process for improving paper strength |
| CN103360550A (en) * | 2013-08-08 | 2013-10-23 | 中国科学技术大学 | Cellulose-graft-polyisoprene copolymer and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 苗聪: "纸浆纤维的原子转移自由基聚合改性及应用的研究", <<中国优秀硕士学位论文全文数据库>> * |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150429 |