CN101377063A - Reinforcing fiber for making paper and preparing method thereof as well as paper product containing the same - Google Patents
Reinforcing fiber for making paper and preparing method thereof as well as paper product containing the same Download PDFInfo
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Abstract
The present invention relates to a reinforced fiber used in papermaking, a preparation method thereof and a paper product containing the fiber. The present invention first provides the reinforced fiber used in papermaking, which is produced by the spinning of the following materials: 80wt percent to 99.95wt percent of polyvinyl alcohol and 0.05wt percent to 20wt percent of modifier; and wherein, the modifier contains one or more of polyamide type, cellulose type, polyamine type and quaternary ammonium salt type high-molecular polymers. The present invention also provides the preparation method of the reinforced fiber and the paper product containing the reinforced fibers. By adding the modifier into spinning stock solution, the obtained reinforced fiber can have more reactive active functional groups, and thereby, the hydrophilicity and wettability of the surface of the reinforced fiber can be enhanced. The reinforced fibers, which are uniformly mixed with paper pulp for papermaking, can notably improve all the intensity indexes of the produced paper product.
Description
Technical field
The invention provides a kind of fortifying fibre for making paper that can obviously improve paper products intensity, the paper products that this fiber preparation method also are provided and contained this fiber.The invention belongs to the pulp and paper technology field.
Background technology
Producing some high strength paper kind, during especially as the manila paper of bank-note paper, value warrant paper and so on, because the restriction of existing plant fiber material self intensity, strength of paper is difficult to have raising by a relatively large margin again.Along with the development of textile industry and to the deepening continuously of chemical fibre research, developed increasing chemical fibre new varieties, and, chemical fibre in paper industry, also be widely used in the manufacturing paper with pulp special paper of various uses.Some high-performance chemical fibers newly developed provide wide application space for the research and development of speciality paper especially, for example, have the aromatic polyamide fibre (aramid fiber) of high strength and high-modulus and heteroaromatic fibrid (pbo fiber) and can be used for producing speciality paper with characteristics such as high temperature resistant, fire-retardant, insulation; The polyether sulphone fiber can be used for producing heat-resisting, fire-retardant and radiation-resistant speciality paper.Above-mentioned these speciality papers generally all are to use in special industrial environment, and therefore, though the fiber of interpolation also can improve its intensity, what in fact these technical schemes were paid attention to is to make paper products have properties such as high temperature resistant, heat-resisting; For bank-note paper, vellum paper, check paper and wrapping paper, and writing paper, gelatine printing paper, the art paper of more use in printing at ordinary times, writing, its environment for use is better, adopt above-mentioned technical scheme to improve its intensity, obviously be inappropriate, not only can cause the wasting of resources, and the price of these fibers is higher, considers also improper from the angle of cost.
The intensity of many chemical fibres is several times, tens times even hundreds of times of string, add make paper products in the pulp after, can improve the intensity of paper products.Add fiber at present and paper products are carried out be mostly undressed fiber is directly added in the paper pulp of papermaking in the technical scheme of modification, pursue the raising of finished paper performance with this.But the surface of chemical fibre is smoother all generally, and relatively poor to the wettability of water, surface-activity is also lower, is difficult to form desired binding between the fiber.These chemical fibres are mixed with other fibrous raw material when copying paper, in forming process, often exist fiber and be difficult to even dispersion, shortcomings such as bond strength is low between the page fiber, this has limited application and the performance performance of chemical fibre in paper making greatly.
If the paper that chemical fibre is mixed copy paper to obtain with string has higher intensity, can handle or in the process of manufacturing paper with pulp, carry out particular processing chemical fibre, increasing the adhesion between the fiber, thereby improve into the intensity of paper.
Summary of the invention
For solving the problems of the technologies described above, the object of the present invention is to provide a kind of fortifying fibre for making paper, it is by the PVA spinning solution being carried out a kind of modified fibre that modification and spinning obtain, it is added in the pulp, the intensity of the paper products that can significantly improve manufactures paper with pulp obtains.
The present invention also aims to provide the preparation method of above-mentioned fortifying fibre for making paper.
The present invention also aims to provide the paper products that contain above-mentioned fortifying fibre, performances such as the intensity of these paper products are greatly improved than the paper products that do not add fiber and add common PVA fiber, also have good printability simultaneously.
The present invention also aims to provide the preparation method of above-mentioned paper products.
For achieving the above object, the present invention at first provides a kind of fortifying fibre for making paper, and it is that the raw material that comprises following composition is carried out spinning and the fiber that obtains: PVA:80wt.%-99.95wt.%, modifier: 0.05wt.%-20wt.%; Wherein, that described modifier comprises is polyamide-based, in cellulose family, polyamine class and quaternary ammonium salt high molecular polymer etc. one or more, for example cationic polyacrylamide, anionic polyacrylamide, amphiprotic polyacrylamide, daiamid epoxy chloropropane, cationic starch, anionic starch, quaternary ammonium salt FX-706 and sodium carboxymethylcellulose (CMC) etc.General can only use a kind of modifier or two kinds of modifier, and when two kinds of composite uses of modifier, its consumption proportion is generally 1:5-1:1, and ionic strong modifier addition is more than ionic weak modifier.
In concrete technical scheme of the present invention, the PVA that is adopted when making fortifying fibre for making paper is raw material commonly used when synthesizing the PVA fiber in the synthetic fiber field; Preferably, the degree of polymerization of the PVA that is adopted is 1500-3000, and alcoholysis degree is 90mol%-99.9mol%.
Fortifying fibre for making paper provided by the invention is mainly used in and adds the intensity that improves into paper in the pulp to, the intensity of fiber itself is also influential to the intensity that becomes paper, but the present invention is intended to increase the active function groups in the PVA fiber, improve its wettability, improve the adhesion of PVA fiber and other fibers, improve into the intensity of paper thus, therefore, fortifying fibre for making paper of the present invention can be called the PVA modified fibre, also can be described as the PVA fortifying fibre.
Above-mentioned fortifying fibre for making paper provided by the present invention is a kind of reactable PVA fortifying fibre, it is the PVA spinning solution of routine to be carried out modification and spinning obtains by modifier, modification by above-mentioned form, can make have in the molecular structure of fortifying fibre for making paper can with the string in the pulp, the active function groups that paper making additive etc. react, the reaction back forms the bigger bondings such as covalent bond of bond energy, the wettability and the surface-activity of PVA fiber have been improved, strengthened the adhesion between the fiber of different nature, the intensity of the paper products that contain this fortifying fibre for making paper is improved greatly, simultaneously owing to the wettability of fiber to water also is improved, increased the hydrophily of fiber surface, can make fiber in paper, reach preferably evenly dispersion effect.For reaching modified effect preferably, can control the consumption of the modifier that adopted, the consumption of modifier can be 0.08wt.%-10wt.%, is preferably 0.2wt.%-8wt.%.
But for making fortifying fibre for making paper provided by the invention have reactive functional as much as possible, promote its with plant fiber material and various paper making additive between combine, can in spinning solution, add different modifier, therefore, modifier of the present invention can be a kind of compound, also can be the composite of two or more compound.When adopting two or more compounds composite, should follow " same sex " principle, that is, if the high polymer that is adopted is a cationic, the high polymer of composite with it so use also must be cation superpolymer or both sexes class high polymer; If the high polymer that is adopted is an anionic property, the high polymer of composite with it so use also must be anion superpolymer or both sexes class high polymer.That is to say that working as the modifier that is adopted comprises two or three in polyamide-based, cellulose family, polyamine class and quaternary ammonium salt high molecular polymer etc. when above, described modifier should be all the polymer of cationic or the polymer of anionic property.For example: adopt cationic polyacrylamide and quaternary ammonium salt FX-706, the quality proportioning of the two is 1:5-2:3, perhaps adopts amphiprotic polyacrylamide and CMC, and the quality proportioning of the two is 2:5-1:1.
Fortifying fibre for making paper provided by the present invention is through dry spinning or wet spinning and the modified fibre that obtains.
The present invention also provides the preparation method of above-mentioned fortifying fibre for making paper, and it comprises raw material is dropped into the process of making the modification spinning solution in the water and this modification spinning solution being carried out spinning.
According to concrete technical scheme of the present invention, the preparation method of above-mentioned fortifying fibre for making paper can adopt the modification spinning solution is carried out wet spinning, for example, this spinning process can be that the modification spinning solution is pressed in the coagulating bath by spinning head, and drawn, heat treatment and oil and make above-mentioned fortifying fibre for making paper.The preparation method of above-mentioned fortifying fibre for making paper also can adopt described modification spinning solution is carried out dry spinning.No matter be wet spinning or dry spinning, concrete method of operating all can be finished according to common process.
The present invention also provides a kind of paper products that contain fortifying fibre for making paper, wherein, contains above-mentioned fortifying fibre for making paper in this paper products page, and with respect to oven dry stock, the mass content of fortifying fibre for making paper in page is 1-30%.According to the difference of above-mentioned paper products purposes, can control the fortifying fibre for making paper content (addition) in the page, when addition was big, the cost of paper products when addition is excessive, became the intensity of paper to reduce on the contrary than higher; Generally speaking, higher addition only is used to the paper of manufacturing paper with pulp specific (special) requirements, needing special surface to handle.Take all factors into consideration the fiber addition to the enhancing effect of paper products and the influence of cost, generally speaking, with respect to oven dry stock, the mass content of fortifying fibre for making paper in page may be controlled to 3-15%.
The size of fortifying fibre for making paper (for example fineness, length etc.) for its with paper pulp in combining of other fibrous raw materials have bigger influence, and then also can influence the intensity of the paper products that contain fortifying fibre for making paper, the fibre fineness of the general fortifying fibre for making paper that is adopted can be 0.8dtex-4.0dtex, preferred 1.5dtex-2.5dtex.The length of fortifying fibre for making paper may be controlled to 2mm-15mm, preferred 3mm-6mm.In addition, under the constant situation of other conditions, reach the purpose that at utmost improves paper strength, the length of the paper grade (stock) string that is adopted can not be too short, and fiber is wire-dividing broom purification as much as possible.Work as pulp fiber, i.e. when the intensity of string self combination was higher, the intensity increase rate of one-tenth paper can be bigger behind the interpolation modified fibre, promptly more helps the performance that modified fibre strengthens effect.
The paper products that contain fortifying fibre for making paper provided by the invention can be paper to the paper products that performances such as intensity have higher requirements for for example bank-note paper, vellum paper, check paper or wrapping paper etc., also can be paperboard, cardboard or its paper products.
The present invention also provides the preparation method of above-mentioned paper products, and it is in paper making process fortifying fibre for making paper to be joined in the pulp, and then obtains needed paper products by the papermaking process of routine.
In technical scheme provided by the invention, by in spinning solution, adding modifier, but can make the fortifying fibre for making paper that obtains after the spinning have more reactive functional, improved the hydrophily and the wettability of fiber surface; Above-mentioned fortifying fibre for making paper is used for paper making with pulp (comprising plant fiber material, paper making additive etc.) mixing according to a certain ratio, fortifying fibre for making paper and other fibers and paper making additive reaction form good binding, can significantly improve every intensity index of prepared paper products, simultaneously, because the hydrophily and the infiltrating raising on fortifying fibre for making paper surface, the dispersiveness of this fiber in page is also better.
The fiber that the present invention adopts is the PVA fiber of using always, compare with manufacturing other fibers that speciality paper adopted, be more suitable in adding paper making pulp to, improve the performances such as intensity of plain paper, and, the cost of the paper products that obtain of manufacturing paper with pulp is relatively low, and broken is easy to recycling, does not pollute the environment.Above-mentioned fortifying fibre for making paper is not only applicable to manufacturing paper with pulp of general paper kind such as for example writing paper, gelatine printing paper, art paper etc., more is applicable to the manufacturing paper with pulp of manila paper of for example bank-note paper, value warrant paper and so on.Difference according to production paper kind, compare with existing paper products, the fracture length that fortifying fibre for making paper provided by the present invention can make into paper improves 8%-50%, and folding strength improves 20%-300%, tearability improves 40%-150%, and bursting strength improves 10%-70%; Compare with adding the common PVA fiber paper that obtains of manufacturing paper with pulp, its various performances also can be greatly improved.And behind the interpolation fortifying fibre for making paper, paper has good printability, phenomenons such as hair, dry linting can not occur falling.
The specific embodiment
Below further introduce enforcement of the present invention and effect thereof by specific embodiment, purpose is to help the reader to understand essence of the present invention and spirit better, can not constitute the qualification to the scope of the present invention.
Embodiment 1:
(1), the PVA (average degree of polymerization 2200, alcoholysis degree 99mol%) of the cationic polyacrylamide (molecular weight is 400,000-800,000) of 1.25wt.%, the strong electropositivity polymeric quaternary ammonium salts of the low molecular weight Fx-706 of 3.75wt.% (new East Asia chemicals Co., Ltd produces) and 95wt.% is added to the water successively makes 15% PVA modification spinning solution in the raw material gross mass.
(2) with the spinning head of PVA modification spinning solution of obtaining in above-mentioned (1) circular spinneret orifice by having 10000 70 μ m diameters, being pressed into sodium sulphate (30% solid content) does in the coagulating bath (90 ℃) of coagulating agent, the fiber of making is reeled with first roller, Tension Control between the metallic plate of spinning head and first roller is between 0.040-0.055N/dtex, and then, make fortifying fibre for making paper through 3 times of wet stretchings, stretching heat treatment (200 ℃ of draft temperatures), last wet goods operation; This fortifying fibre for making paper has the fineness of 2.0dtex, the intensity of 8.5cN/dtex.
(3) fortifying fibre for making paper of making in above-mentioned (2) is cut length,, added in the pulp, manufacture paper with pulp according to conventional papermaking process quantitatively to be 90g/m with 8% mass percent with respect to oven dry stock to 4mm
2Paper.
(4) paper that is added with this kind fortifying fibre for making paper and the same batch of paper that does not add fiber are carried out the intensity index contrast, the strength of paper that is added with this kind fortifying fibre for making paper obviously improves, and is as shown in table 1.
Embodiment 2:
(1) in the raw material gross mass, amphiprotic polyacrylamide with 0.8% (molecular weight is 600,000-800,000), 1.0% CMC (carboxymethyl cellulose, substitution value DS:0.6-0.9) and 98.2% PVA (average degree of polymerization 2200, alcoholysis degree 99mol%) are added to the water successively and make 15% PVA modification spinning solution.
(2) the PVA modification spinning solution that obtains in above-mentioned (1) is carried out spinning and through 4 times of wet stretchings, stretching heat treatment (220 ℃ of draft temperatures), last wet goods operation, makes fortifying fibre for making paper according to the described same procedure of step (2) among the embodiment 1.This fortifying fibre for making paper has the fineness of 1.95dtex, the intensity of 8.3cN/dtex.
(3) fortifying fibre for making paper that makes in above-mentioned (2) is manufactured paper with pulp into paper according to the described same procedure of step (3) among the embodiment 1.
(4) paper that is added with this kind fortifying fibre for making paper and the same batch of paper that does not add fiber are carried out the intensity index contrast, the strength of paper that is added with this kind fortifying fibre for making paper obviously improves, and is as shown in table 1.
Comparative Examples 1:
(1) in the raw material gross mass, the PVA with 15% (average degree of polymerization 2200, alcoholysis degree 99mol%) spinning solution is according to the described same procedure spinning of embodiment 1 step 2 and make the PVA fiber; This PVA fiber has the fineness of 2.0dtex, the intensity of 8.0cN/dtex.
(2) the PVA fiber that makes in above-mentioned (1) is manufactured paper with pulp into paper according to the described same procedure of step (3) among the embodiment 1.
(3) paper that is added with this kind PVA fiber and the same batch of paper that is added with fortifying fibre for making paper are carried out the intensity index contrast, as shown in table 1.
Comparative Examples 2:
Do not add fortifying fibre for making paper in pulp, other all manufactures paper with pulp into paper according to the described same procedure of the step among the embodiment 1 (3), and the paper strength index is as shown in table 1.
Table 1:
Fiber dispersion degree experimental example:
With the quantitative 80g/m of needle slurry preparation
2Handsheet be example, observe the degree of scatter of fortifying fibre for making paper.
To get 1.25g fortifying fibre for making paper and 625g mass concentration be 4% softwood pulp and add the 1500g running water, pouring standard into together with fortifying fibre for making paper and slurry discongests and takes out after discongesting 5min in the device (300r/min), behind running water dilution finite concentration,
Manufacture paper with pulp and be dried on Blattbildner-sheet Former (PTI company produces, the RK-3A type) handshcet former and quantitatively be 80g/m
2Handsheet, the gained handsheet is met the degree of scatter that light is observed fortifying fibre for making paper with magnifying glass, can see that fortifying fibre for making paper can evenly disperse in paper.
Claims (15)
1, a kind of fortifying fibre for making paper, it is that the raw material that comprises following composition is carried out spinning and the fiber that obtains: polyvinyl alcohol: 80wt.%-99.95wt.%, modifier: 0.05wt.%-20wt.%;
Wherein, described modifier comprises one or more in polyamide-based, cellulose family, polyamine class and the quaternary ammonium salt high molecular polymer.
2, fortifying fibre for making paper as claimed in claim 1, wherein, the consumption of described modifier is 0.08wt.%-10wt.%.
3, fortifying fibre for making paper as claimed in claim 1, wherein, the degree of polymerization of described polyvinyl alcohol is 1500-3000, alcoholysis degree is 90mol%-99.9mol%.
4, fortifying fibre for making paper as claimed in claim 1, that described modifier comprises is polyamide-based, in cellulose family, polyamine class and the quaternary ammonium salt high molecular polymer more than two or three, and described modifier is all the polymer of cationic or the polymer of anionic property.
5, fortifying fibre for making paper as claimed in claim 1, wherein, this fiber is through dry spinning or wet spinning and the modified fibre that obtains.
6, the preparation method of each described fortifying fibre for making paper of claim 1-5, it comprises raw material is dropped into the process of making the modification spinning solution in the water and this modification spinning solution being carried out spinning.
7, preparation method as claimed in claim 6 wherein, carries out wet spinning or dry spinning with described modification spinning solution.
8, a kind of paper products that contain fortifying fibre for making paper wherein, contain each described fortifying fibre for making paper of claim 1-5 in this paper products page, with respect to oven dry stock, the mass content of described fortifying fibre for making paper in page is 1-30%.
9, paper products as claimed in claim 8, wherein, with respect to oven dry stock, the mass content of described fortifying fibre for making paper in page is 3-15%.
10, paper products as claimed in claim 8 or 9, wherein, the fibre fineness of described fortifying fibre for making paper is 0.8dtex-4.0dtex.
11, paper products as claimed in claim 10, wherein, the fibre fineness of described fortifying fibre for making paper is 1.5dtex-2.5dtex.
12, paper products as claimed in claim 8 or 9, wherein, the length of described fortifying fibre for making paper is 2mm-15mm.
13, paper products as claimed in claim 12, wherein, the length of described fortifying fibre for making paper is 3mm-6mm.
14, paper products as claimed in claim 8, these paper products are bank-note paper, vellum paper, check paper or wrapping paper.
15, the preparation method of each described paper products of claim 8-14 is characterized in that, in paper making process described fortifying fibre for making paper is added in the pulp.
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Cited By (6)
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| CN101503280B (en) * | 2009-03-06 | 2011-05-18 | 陕西科技大学 | Inorfil softening intensifier and preparation thereof |
| CN104452426A (en) * | 2014-11-20 | 2015-03-25 | 浙江恒达纸业有限公司 | Preparation method of reinforced fiber for special paper |
| CN107869087A (en) * | 2017-11-03 | 2018-04-03 | 广东松炀再生资源股份有限公司 | A kind of method that reclaimed waste paper prepares highly intensified corrugated paper |
| CN109295522A (en) * | 2018-10-09 | 2019-02-01 | 济南圣泉集团股份有限公司 | Polyvinyl spinning solution and preparation method thereof, soluble vinylon fiber therefrom and the water soluble paper comprising it |
| CN114763682A (en) * | 2021-05-25 | 2022-07-19 | 上海嘉泰纸制品有限公司 | High-strength paper product packaging material and application thereof |
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| GB2309039B (en) * | 1996-01-12 | 1999-07-07 | Portals Ltd | Security paper |
| JP3950410B2 (en) * | 2002-12-10 | 2007-08-01 | 名古屋油化株式会社 | Fiber, fiber assembly, fiber assembly molding |
| CN100339519C (en) * | 2005-12-13 | 2007-09-26 | 中国石化集团四川维尼纶厂 | Method of preparing high performance polyvinyl alcohel fiber |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101503280B (en) * | 2009-03-06 | 2011-05-18 | 陕西科技大学 | Inorfil softening intensifier and preparation thereof |
| CN104452426A (en) * | 2014-11-20 | 2015-03-25 | 浙江恒达纸业有限公司 | Preparation method of reinforced fiber for special paper |
| CN107869087A (en) * | 2017-11-03 | 2018-04-03 | 广东松炀再生资源股份有限公司 | A kind of method that reclaimed waste paper prepares highly intensified corrugated paper |
| CN109295522A (en) * | 2018-10-09 | 2019-02-01 | 济南圣泉集团股份有限公司 | Polyvinyl spinning solution and preparation method thereof, soluble vinylon fiber therefrom and the water soluble paper comprising it |
| CN109295522B (en) * | 2018-10-09 | 2021-07-09 | 济南圣泉集团股份有限公司 | Vinylon spinning solution, preparation method thereof, water-soluble vinylon fiber obtained from vinylon spinning solution and water-soluble paper containing vinylon fiber |
| CN114763682A (en) * | 2021-05-25 | 2022-07-19 | 上海嘉泰纸制品有限公司 | High-strength paper product packaging material and application thereof |
| CN114763682B (en) * | 2021-05-25 | 2023-11-14 | 上海嘉泰纸制品有限公司 | High-strength paper product packaging material and application thereof |
| CN114960290A (en) * | 2022-06-01 | 2022-08-30 | 上海凯悟新材料科技有限公司 | Cover paper special for certificate and preparation method and application thereof |
| CN114960290B (en) * | 2022-06-01 | 2023-08-22 | 上海凯悟新材料科技有限公司 | Cover paper special for license, and preparation method and application thereof |
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Address after: No.2166, Shengxing West Road, Baoding City, Hebei Province 071071 Patentee after: BAODING BANKNOTE PAPER Co.,Ltd. Patentee after: China Banknote Printing and Minting Group Co.,Ltd. Address before: No.2166, Shengxing West Road, Baoding City, Hebei Province 071071 Patentee before: BAODING BANKNOTE PAPER Co.,Ltd. Patentee before: CHINA BANKNOTE PRINTING AND MINTING Corp. |