Betulin used as filler for paper and cardboard

FIELD: textiles; paper.

SUBSTANCE: betulin is meant for being used as filler for paper or cardboard manufacturing. Betulin water suspension is obtained, and then it is added to cellulose pulp during paper or cardboard manufacturing. Water is removed from paper web. Paper or cardboard manufacturing is continued using a conventional method.

EFFECT: improving retention ability of filler, formation light, strength and lightness of paper, providing high volume and low porosity for increasing water impermeability, and preventing brightness reversion of cellulose pulp.

12 cl, 2 tbl, 3 ex, 4 dwg

 

The technical field

The present invention relates to the use of betulin as filler for paper and cardboard, the method of production of paper and cardboard, which the company used as a filler, and in addition to paper and cardboard, including betulin as filler.

The level of technology

As a filler for paper and paperboard used mainly inorganic fillers such as kaolin, talc, silica, silicates, titanium dioxide and carbonates of calcium, and, in addition, to some extent, fillers, including organic polymeric pigments, which may also be hollow. As examples of such pigments can be mentioned polymeric pigments based on urea-formaldehyde resins.

Preferably, the filler is reduced as less light scattering of paper and its tensile strength. Excellent light scattering coefficient among the most commonly used inorganic fillers has expensive titanium dioxide.

In the European Union is now considering the question of what in the future will be illegal to dispose suitable for composting waste to landfill. Therefore, the only economically viable alternative for the removal of such waste would be incinerated. However, reorgani the mini pigments will not burn, and will give the remains of the ash as waste, while the organic compounds can be recycled by burning without residue waste. In addition, staged in the EU target for the share of energy biological processes in the total energy production should be achieved by 2010, and, thus, the combustible organic pigments in this regard are also in demand.

In the timber and woodworking industry annually produces huge amounts of waste birch bark, and these wastes are processed mainly by burning. Betulin is found in birch bark, and its content in the outer birch bark is 20-40%. Betulin can be extracted from birch, for example, from the outer bark of the birch family Betula verrucosa (Birch), the most common in Scandinavia, by extraction with organic solvents, using known methods.

Betulin has a structure Pyh triterpene alcohol and is also known under the trivial name Betulinol and systematic name loop-20(29)ene-3,28-diol. The structure of betulin is expressed by the following formula I:

Betulin is a white crystalline powder with a low density, with strongly hydrophobic properties, and he barely races is work in the water.

The use of betulin in the paper industry to some extent already been studied, especially its effect on yellowing paper, yellowing of the pulp and its smell. In the Patent Finland FI102402 discusses the use of betulin as a coating pigment in paper and cardboard separately or in combination with other pigments. Was prepared covering the pasta from betulin by suspension together with auxiliary substances in the water the same way as they do in the case of talc, and stabilization of the suspension with stabilizer. Cover the paste made from the thus obtained suspension, using known in the art excipients, or with or without the use of other coating pigments, such as kaolin, calcium carbonate or talc. With this covering paste containing betulin, could be obtained coated paper base having improved dispersion of light due to the fact that in the structure of betulin are among the other hydroxyl group required for holders of optical brighteners.

Based on the above discussion it is evident that there is a need for paper and cardboard made of combustible materials, with properties corresponding to the properties of paper and paperboard produced with traditional EmOC what literami, and the way to obtain the specified paper and cardboard.

Disclosure of inventions

The invention relates to the use of betulin as filler for paper and cardboard.

The invention also relates to a method for producing paper and cardboard, including the use of betulin as filler.

In addition, the invention relates to paper and paperboard, containing betulin as filler.

Distinctive signs of the use of betulin in the production of paper and cardboard, method of producing paper and cardboard and paper and paperboard, containing betulin as filler according to the invention is presented in the claims.

The invention

It was unexpectedly discovered that the problems and disadvantages of the known technical solutions can be solved or at least largely eliminated by the use of betulin as a filler for paper and cardboard. In the manufacture of paper or paperboard suspended in water betulin added to the pulp mass, preferably after adding retaining additives, that is in suspension, preferably containing betulin not more than 60 mass%, particularly preferably from 5 to 35% by weight. The result can be obtained from paper and cardboard, which can be burned and which have properties corresponding to the properties of paper and paperboard is, get with traditional fillers.

Detailed description of the invention

According to the invention betulin can be used as a filler for paper and cardboard, in particular as a filler uncoated paper and paperboard, preferably in itself, and together with the known inorganic and/or organic fillers. From betulin receive aqueous suspension and then the suspension is added to the pulp mass after adding retaining additives in the process of getting the paper or cardboard. Preferably, not more than 60 mass% betulin was dispersible in water with one or more auxiliary substances, particularly preferably from 5 to 35% by weight. As auxiliary substances can be used one or more traditional agents used for dispersing hydrophobic compounds. These excipients are preferably selected from the group consisting of dispersing agents, surface-active agents and stabilizers that stabilize the dispersion and prevent the formation of agglomerates.

Dispersing agent may be used in amounts of from 0 to 1% by weight, preferably from 0.01 to 0.4% by weight, and the amount of surface-active agent is from 0 to 6% by weight, preferably from 2,to 5% by weight, and the amount of stabilizer is from 0 to 1% by weight, preferably from 0.1 to 0.3% by weight. Suitable dispersing agents include dispersing agents suitable for hydrophilic fillers such as salts of polymers of acrylic acid; examples of suitable surface active agents include polyethylene glycols, and suitable stabilizers include polyvinyl alcohols. The percentages by weight are relative to the mass of the suspension.

If necessary, adjust the pH of the suspension through the base to the value of at least an 8.5, preferably from 8.5 to 10. Examples of suitable bases include inorganic bases, such as NaOH, KOH and the like.

Preferably, betulin was used in the form of fine powder with an average particle size of not more than 30 μm, preferably to a particle size comprised between 0.3 and 10 μm, particularly preferably from 0.5 to 2.5 μm. The image obtained with a scanning electron microscope, the crushed particles betulin shown on the attached figure 1.

Betulin can be obtained from birch by highlighting, for example, by extraction from birch bark, debarking waste from pulp mills or industrial sawmills, or it may be synthetically derived betulin. Preferably use bet is lean with purity, at least 85% by weight, preferably at least 95 mass%.

The method according to the invention to obtain a paper or paperboard includes a stage on which receive water suspension containing preferably not more than 60% by weight, in particular from 5 to 35% by weight of finely ground betulin, which, if necessary, adjust to the desired particle size of, for example, using grinding and then specified the suspension is added to the pulp mass, used for the production of paper or cardboard, in particular the finely ground pulp weight, preferably before adding the retention additives. Then remove the water from the paper web, followed by drying and calandrinia paper or cardboard, if necessary, that is, the production of paper or paperboard continue to well-known specialists in this area in the traditional way.

The pulp used in the production of paper or cardboard, includes chemical pulp or wood pulp, or a mixture, while it is preferable that the pulp for fine paper included pulp from coniferous wood and pulp from hardwood. Different types of pulp can be freely mixed, depending on the produced product.

Paper or cardboard according to the invention comprises betulin as Napo the preserver, the number of betulin in paper or cardboard is from 0.1 to 60%, preferably from 5 to 35% by mass.

Betulin can be used as filler for high-grade securities in the securities containing chemical pulp and mechanical pulp for uncoated and coated premium paper, coated paper, containing wood pulp, and, in addition, for the surface layers of cardboard, for example, in folding boxboard and facing the cardboard. Preferably, betulin was used for high-grade securities, containing at the present time, the traditionally high levels of inorganic llers.

The present invention has significant advantages compared with the prior art. Fixation betulin is significantly higher than conventional inorganic fillers. Thanks to this high uderzhivaemoi betulin improving the quality of recycled water, the result is a cleaner circulating water and requires a smaller amount of the fixing agent and retention additives. Improved lumen by reducing retention additives. In addition, the examples show that paper containing as a filler betulin, significantly improved combination of indicators tensile strength and light scattering, and the index p is echnosti on the gap can be increased in comparison with the use of precipitated calcium carbonate by about 40% without reducing the light scattering coefficient. This is illustrated in figure 2. Tensile delamination of paper and cardboard, characterized grip force Scott, also slightly increased.

In comparison with the known filler, precipitated calcium carbonate (COC), providing a high volume, betulin unexpectedly also provides high volume, but low porosity. Due to this low porosity receive a paper with improved water-resistant surface coating, and, accordingly, at the stage of coating the paper requires significantly less covering pastes for high-quality coatings. In addition, as shown by the results of example 3, betulin prevents yellowing pulp.

Due to the low density of betulin it is a light matter, while traditional inorganic pigments are heavy substances, which leads to higher transport costs than in the case of light substances. With this easy betulin can be obtained from the lighter kinds of paper for printing and Newspapers, resulting in a decrease postage and shipping costs and the costs of recycling of waste paper and, accordingly, can be applied less harm to the environment due to waste.

Unlike betulin inorganic pigments do not belong to renewable resources. Betulin is a Ki is an organic compound with a high heat of combustion, and, in addition, it does not ash. In addition, the company has antiviral, antifungal and antimicrobial activity, and therefore the amount of antimicrobial agents used in the manufacture of paper and cardboard can be reduced, which clearly reduces the load on the environment caused by these substances.

The invention is further illustrated by the following examples, but without limiting the scope of the invention.

Examples

Example 1

The dispersion of betulin with getting the suspension.

Betulin was ground to obtain fine powder with an average particle size of about 1 μm. Figure 1 presents an image of the crushed betulin, obtained with a scanning electron microscope. Then, 0.15 parts by weight dispersing agent (Fennodispo A41), 3.5 parts by weight of surface-active agent (Lutesol T07) and 0.02 parts by mass of 10% NaOH solution was added to water and mixed, followed by adding 100 parts by weight of crushed betulin and 0.15 parts by weight of stabilizer (Celvol 103) to the thus obtained mixture. Then the mixture was dispersively for 40 minutes using a dispersing installation Diaf.

Example 2

Obtaining and testing sheets of paper containing betulin.

To obtain sheets of paper used 70% by weight pulp SR 21 from birch wood and 30% is about the mass of pulp SR 27 from coniferous wood. To the pulp mixture was added 0.3 mg/g retention additives Percol 47 relative to the weight of dry pulp, and from 5 to 30% by weight dispersion of betulin, obtained in example 1. From the thus obtained pulp produced normal laboratory sheets of paper with a surface weight of 60 g/m2, squeezed in the usual way, was dried and subjected to tests.

Sheets of paper were subjected to extraction with acetone followed by determination of the number of betulin by gas chromatography using an internal standard. Hold betulin was quite high, with filler content was 10% and 20%. The control sheet 1 did not contain filler, and other contact sheets of paper used precipitated calcium carbonate (COC) in the form of scalenohedral. Hold the JCC was lower, and, in the best case, the filler content was 8% and 3%. When comparing sheets of paper containing 10% betulin and 8% of JCC found that betulin gives better results in strength, in particular significantly higher value of tensile strength. In addition, betulin was better porosity compared to the control agents. The results are shown below in table 1 and 2 and the accompanying figure 2 presents the tensile strength as a function of the light scattering coefficient.

Table 1
SampleMass, g/m2Thickness, micronsBulk volume, cm3/kgTensile strength, kNm/kgTensile delamination/ clutch Scott,
J/m2
Porosity, ml/min
Control 159,5761,2749,0450470
Betulin 10%64,81071,6471,5300950
Betulin 20%72,5135to 1.8628,81301350
COC 3%57,277of 1.34of 57.5415790
JCC 8%59,1821,3952,02851030

Table 2
SampleMass, g/m2Opacity, %The light scattering coefficient, m2/kg
Control 159,563,824,8
Betulin 10%64,877,137,6
Betulin 20%72,386,253,5
COC 3%57,268,331,0
JCC 8%59,173,3of 37.9

Example 3

The manufacture and testing of sheets of paper containing betulin.

Laboratory sheets of paper with a surface weight of 60 g/m2prepared and the chemical pulp, containing, respectively, 10% and 20% by weight of betulin and for comparison, 3% and 8% by weight of filler COC (Alcabar LO), while the composition of the pulp contained 70% by weight pulp from birch and 30% by weight tall.

Figure 3 and 4 shows the results of ISO test and white test on the coefficient of absorption. The sheets of paper containing betulin, I came to a markedly slower than the sheets containing the filler COC, and, in addition, the sheets containing betulin, whitened faster in the light than other sheets. From the point of view of the optical properties of the sheets containing betulin, consistent with the sheets containing the filler COC.

1. The use of betulin as filler for paper or paperboard, in which the company added to the pulp mass in the process of getting the paper or cardboard.

2. The use according to claim 1, characterized in that the betulin is used in combination with organic and/or inorganic fillers.

3. The method of producing paper or paperboard, wherein the prepared aqueous suspension of betulin and then adding the specified suspension of pulp mass in the process of production of paper or cardboard and remove the water from the paper web, and then receive paper or paperboard continue in the traditional way.

4. The method according to claim 3, characterized in that betulin suspended in water together with one or more of vspomogatelnymi substances, selected from the group consisting of dispersing agents, surface-active agents and stabilizers.

5. The method according to claim 3 or 4, characterized in that the aqueous suspension containing betulin add to the pulp mass in the process of getting the paper or cardboard after adding retaining additives.

6. The method according to claim 3, characterized in that the aqueous suspension contains not more than 60 mass% betulin.

7. The method according to claim 6, characterized in that the aqueous suspension contains from 5 to 35% by weight of finely ground betulin.

8. The method according to claim 3, characterized in that the aqueous suspension contains betulin with an average particle size of not more than 30 μm.

9. The method of claim 8, wherein the aqueous suspension contains betulin with an average particle size of from 0.3 to 10 microns.

10. The method of claim 8, wherein the aqueous suspension contains betulin with an average particle size of from 0.2 to 2.5 μm.

11. Paper or cardboard, characterized in that they contain from 0.1 to 60% by weight, preferably from 5 to 35% by weight of betulin as filler.

12. Paper or cardboard according to claim 11, characterized in that the contain betulin as a filler in combination with inorganic and/or organic fillers.



 

Same patents:

FIELD: textiles; paper.

SUBSTANCE: method (versions) concerns manufacture of paper and can be used in the paper and pulp industry. Method includes (i) providing a water suspension, which contains cellulose fibres; (ii) adding to the suspension after all the stages of strong shearing action of the first polymer, which is a cationic polymer; a second polymer and a third polymer, which is an organic or inorganic anionic polymer; and (iii) dehydration of the obtained suspension for forming paper.

EFFECT: improvement in the drainage and retention for all types of paper stock, increasing the speed of the papermaking machine, using low doses of polymers, improving the method of paper manufacturing and increasing the economic efficiency of the process.

16 cl, 7 tbl, 7 ex

Paper filler // 2345189

FIELD: textile, paper.

SUBSTANCE: filler is designed for paper making and can be used in pulp-and-paper industry. Filler contains calcium salt and cellulose derivative with lattice ionic fractional substitutionality up to approximately 0.65, where filler is essentially free from either cellulose fibre or fibrils or lignocellulose. Filler contains calcium salt and cellulose derivative with lattice ionic fractional substitutionality up to approximately 0.65, where cellulose derivative can contain cationic groups. Besides the invention refers to production process of filler involving mixing the agent substance containing calcium salt and cellulose derivative with lattice ionic fractional substitutionality up to approximately 0.65, essentially without cellulose fibre or fibrils or lignocellulose. Other production process of filler consists in mixing the agent substance containing calcium salt and cellulose derivative with lattice ionic fractional substitutionality up to approximately 0.65, where cellulose derivative contains cationic groups. The invention refers to method for making paper including preparation of aqueous suspension containing cellulose fibre, suspension addition with filler containing calcium salt and cellulose derivative with lattice ionic fractional substitutionality up to approximately 0.65, where filler is essentially free from either cellulose fibre or fibrils or lignocellulose; dehydration of suspension thus making web or paper sheet. The invention also refers to method for making paper including preparation of aqueous suspension containing cellulose fibre; suspension addition with filler containing calcium salt and cellulose derivative with lattice ionic fractional substitutionality up to approximately 0.65, where cellulose derivative contains cationic groups; dehydration of suspension thus making web or paper sheet.

EFFECT: higher sizing efficiency with good drainage, retention and serviceability of papermaking machine.

24 cl, 3 tbl, 4 ex

FIELD: textiles, paper.

SUBSTANCE: method refers to pulp-and-paper industry, specifically to method for making bag paper, as well as to bag paper with improved service properties. Method for making bag paper involves pulp beating stage at fibre concentration 28-40% and thereafter at fibre concentration 3-6%. It is followed by two-staged addition of reinforcing and at once flocculating agent to pulp. Then paper web is casted and dried. Further beating stage at fibre concentration 3-6% requires power consumption within 20-60 kWt/h per paper ton. The second stage of addition is followed with the third stage of addition implying flocculating agent preceding headbox. Herewith at the first stage, reinforcing and at once flocculating agent is cationic starch of fractional substitutionality 0.040-0.150 in amount 0.1-1.2% of absolutely dry fibre weight, or polyacrylamide in amount 0.1-0.5% of absolutely dry fibre weight. Specified agent is added to pulp, 5-120 minutes prior to paper web casting. At the second stage reinforcing and at once flocculating agent is added in amount 0.005-0.400% of absolutely dry fibre weight. Specified agent is added to pulp, 20-120 seconds prior to paper web casting. At the third stage flocculating agent is anionic montmorillonite microparticle dispersion. Specified agent is added to pulp in amount 0.05-0.50 % of absolutely dry fibre weight. Bag paper is made under the offered method.

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4 cl, 1 tbl, 3 ex

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23 cl, 3 tbl, 25 ex

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25 cl, 11 tbl, 10 ex

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11 cl, 3 tbl, 2 ex

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3 cl, 3 tbl, 12 ex

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1 tbl, 1 ex

FIELD: textiles, paper.

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1 tbl, 2 ex

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28 cl, 1 dwg, 5 tbl, 4 ex

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29 cl, 25 dwg, 14 tbl, 8 ex

FIELD: textile, paper.

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EFFECT: prepared modified paper has increased gas-proof and heat-protective properties, and resistance to thermal-oxidative degradation.

1 tbl, 6 ex

FIELD: textile, paper.

SUBSTANCE: invention relates to papermaking technology, precisely to production of modified paper with higher gas-proof and heat-protective properties, and can be applied in constructions, aircraft and automobile constructions, shipbuilding. The method includes treatment of paper with the mixture of 5-7% aqueous solution of polyvinyl alcohol with 5-7% aqueous solution of chitosan at their ratio 1:1 within 10-15 minutes, thereafter treatment with 15-20% aqueous solution of methyl phosphate borate and drying.

EFFECT: prepared modified paper has increased gas-proof and heat-protective properties, and resistance to thermal-oxidative degradation.

1 tbl, 6 ex

FIELD: textile, paper.

SUBSTANCE: invention relates to papermaking technology, precisely to production of modified paper with higher gas-proof and heat-protective properties, and can be applied in constructions, aircraft and automobile constructions, shipbuilding. The method includes treatment of paper with the mixture of 5-7% aqueous solution of polyvinyl alcohol with 5-7% aqueous solution of chitosan at their ratio 1:1 within 10-15 minutes, thereafter treatment with 15-20% aqueous solution of methyl phosphate borate and drying.

EFFECT: prepared modified paper has increased gas-proof and heat-protective properties, and resistance to thermal-oxidative degradation.

1 tbl, 6 ex

FIELD: textile, paper.

SUBSTANCE: invention relates to production technology of synthetic paper, precisely to production of modified paper with higher gas-proof and heat-protective properties, and can be applied in constructions, aircraft and automobile constructions, shipbuilding. The compound contains 5-7% aqueous solution of polyvinyl alcohol, 15-20% aqueous solution of methyl phosphate borate and 5-7% aqueous solution of chitosan at the following ratio, pts. wt. polyvinyl alcohol - 5-7; chitosan - 5-7; methyl phosphate borate - 15-20; water - 275-266.

EFFECT: increase of gas-proof and heat-protective properties, and resistance to thermal-oxidative degradation of modified paper.

2 tbl, 6 ex

FIELD: textile, paper.

SUBSTANCE: invention relates to production technology of synthetic paper, precisely to production of modified paper with higher gas-proof and heat-protective properties, and can be applied in constructions, aircraft and automobile constructions, shipbuilding. The compound contains 5-7% aqueous solution of polyvinyl alcohol, 15-20% aqueous solution of methyl phosphate borate and 5-7% aqueous solution of chitosan at the following ratio, pts. wt. polyvinyl alcohol - 5-7; chitosan - 5-7; methyl phosphate borate - 15-20; water - 275-266.

EFFECT: increase of gas-proof and heat-protective properties, and resistance to thermal-oxidative degradation of modified paper.

2 tbl, 6 ex

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