Decorative paper suitable for jet printing

FIELD: printing industry.

SUBSTANCE: decorative paper contains a paper base and an ink-absorbent layer. At the same time the ink-absorbent layer is dyed so that the decorative paper after soaking with impregnating resins and pressing as laminate has the same dye, as well as dyeing of laminate from decorative paper, which does not include the ink-absorbent layer. The latter contains a dyeing pigment and/or colorant in the amount rated for a weight of a dry absorbent ink and makes from 45 to 75%.

EFFECT: reduced quantity of a filler and a pigment in the paper base without deterioration of coverage of the proposed decorative paper.

8 cl, 3 tbl, 9 ex

 

The invention relates to a decorative paper, which can be impregnated with thermosetting resin and which is suitable for printing by a method of inkjet printing, and decorative paper as the laminate has the same appearance as in its raw form.

Decorative paper is required to obtain decorative laminates, which are used as building materials in the manufacture of furniture and for interior decoration. Under the decorative laminates are due mainly to the so-called high pressure laminates (HPL) and low pressure laminates (LPL). To obtain laminates high pressure decorative paper without printing or printing impregnated with resin and pressed in the laminating press together with one or more styling layers of Kraft paper which have been impregnated with phenolic resin (Central paper at a temperature of from about 110 to 170°C and a pressure of from about 5.5 to 11 MPa. Then formed the so-laminate (HPL) is glued to the base, such as wood-fiber Board, high density or particle Board, or glued to it. The low pressure laminates get that resin-impregnated decorative paper, with or without printing, pripressovyvajut at a temperature of 160-200°C and a pressure of from 1.25 to 3.5 MPa directly to the base.

Obl is gorgiana the surface of the material may be of an optical nature (appropriate staining) and/or physical nature (drawing on the sheet surface coating, having the appropriate functionality and structure). Decorative paper can be processed with or without embossed pattern.

The printing pattern is usually a method of gravure printing. In particular, when creating a common market of printed drawings the advantage of this method of printing is the ability to print on a large amount of paper with a high speed machine. If the figure should be applied on a white decorative paper, this leads to high consumption of paint and more complex figures often lack the sharpness of the image due to missing pixels in the image.

Therefore, the conventional decorative pictures that get way gravure printing, usually printed on a suitable color decorative paper-based. So, for example, an imitation of oak printed on brown or light brown paper. This way has two advantages. First, the printed image looks more natural due to the greater uniformity and balance of colour, secondly, it reduces the consumption of printing inks.

In accordance with the request of recent years caused the drawings become more and more complicated and customized form. However, this increase diversity of drawings accompanied by a decrease in production quantity. The result of the addition is that way gravure printing for small series should be assessed as uneconomic and, as for the print quality in the case of complex drawings, as unsatisfactory. However, in the field of design is important just getting small amounts.

Of printing methods, which meet the requirements of flexibility and quality, is becoming increasingly important method of inkjet printing (Ink-Jet).

To make decorative base paper suitable for inkjet printing, it is covered by one or more functional layers for ink absorption and fixation of the dyes. This is suitable for inkjet printing decorative paper described, for example, in DE 19916546 A1.

Usually the inkjet paper is white. Inks for inkjet printing must sometimes be applied in large quantities, to where it's needed for picture, close the whiteness of the base paper.

Object of the invention is to provide a decorative paper that has the same advantages as painted decorative paper gravure-printing, but it can economically favorably be produced in smaller quantities.

The next task of the invention is to provide a decorative paper, which is used in testing for a quick visual assessment of the later gravure printing.

Sadacharan decorative paper, which contains the base paper (decorative base paper) and ink absorbing layer, and the ink absorbing layer is colored so that the decorative paper after impregnation conventional impregnating resins and pressing a laminate has the same colour as laminate of decorative paper that does not contain ink absorbing layer.

Suitable for use according to the invention by a paper-based paper, which is not subject to the sizing in the mass, nor the gluing surface. It consists mainly of cellulose, pigments and fillers and conventional additives. Conventional additives can be agents, giving blagorodnost, agents, retention and retainers. Decorative base paper differs from ordinary paper is much higher content of filler or pigment and a lack of normal for paper sizing in the mass or surface sizing.

To obtain a decorative base paper can be applied cellulose from coniferous wood pulp from hardwood or a mixture of both pulp grades. Preferably the use of 100% pulp from hardwood. But can also be used a mixture of cellulose from wood of coniferous and deciduous species in the mass ratio of from 5:95 to 50:50, in particular from 10:90 to 30:70. The paper base may be made on the securities is making machines Furdrine or samojedny paper machines. This pulp mixture with a consistency of 2-5 wt.% you can grind to the consistency of grind from 10 to 45°SR. In a mixing VAT, you can add fillers and/or pigments, coloring pigments and/or dyes, as well as wet strength agents, such as polyamide/polyamine-epichlorhydrine resin, cationic polyacrylates, modified melamineformaldehyde resin or carinsurance starches, in the ordinary to obtain a decorative paper quantities and mixed with the pulp mixture.

The fillers and/or pigments may be added to the amount (weight) of up to 55 wt.%, in particular from 10 to 45 wt.%, based on the weight of cellulose. Suitable pigments and fillers are, for example, titanium dioxide, talc, zinc sulfide, kaolin, aluminum oxide, calcium carbonate, aluminum oxide, aluminosilicates and magnesium silicates or mixtures thereof.

Obtained in the mixing VAT dense mass can be diluted to a consistency of about 1%. If you want to add further auxiliaries, such as agent retention, non, dyes, and other, above-mentioned excipients or mixtures thereof. This diluted the weight carried through the drain on the grid paper machine wire section. Formed non-woven fabric, and after removal of water receive a base paper which is then dried. The density obtained boom the guy can range from 15 to 300 g/m 2.

Depending on the application and quality requirements used according to the invention the decorative base paper may have the following properties:

- polished, i.e. smoothness on Beck above 80 sec,

- nilasena, <80 sec,

- polished by a Yankee cylinder or calender,

- pre-impregnated or not impregnated with synthetic resin,

- very breathable (Gurley value below 20 sec/hml) (hml=100 ml) or dense (Gurley value higher than 20 sec/hml), or even in the case of prepregs is very tight with the Gurley values above 200 sec/hml.

To paint the decorative paper according to the invention can be applied inorganic pigments such as the oxides, hydroxides and hydrates of metal oxides, sulfides, sulfates, chromates and molybdates metals or mixtures thereof, and organic pigments and/or dyes as carbonyl dyes (e.g., quinone, chinagreen), cyanine dyes, azo dyes, azomethine and Metin, phthalocyanine or dioxazine. Particularly preferred mixtures of inorganic pigments and organic pigments or dyes. Can be used, for example, the following commercially available pigments and dyes, as iron oxide (EO) Yellow (Bayferrox 415), iron oxide (EO) Red (Bayferrox 110 M), soot Carbofin LC 2900, pigment Blue PB 15, painting egment Violet PV 23 and the Yellow dye PY 97 and mixtures thereof. The above-mentioned pigments and dyes in the sense of the invention suitable for use in decorative paper-based, and in the ink absorbing layer.

The term pigment(s) or dye(s) should be understood only pigment or mixture of pigments, respectively, only the dye or mixture of dyes.

Which pigment(s) or dye(s) used depends on the desired color decorative paper. The amount of coloring pigment(s) and/or dye(s) in decorative paper-based may, depending on the type of material to be from 0.0001 to 5 wt.%, in particular from 0.001 to 4 wt.%. Indicate the amount calculated on the weight of cellulose.

For absorbing ink layer can be applied all the known absorbing layers. It is mainly hydrophilic coatings that contain water-soluble or dispersible polymers in water.

Absorbent ink layer may additionally contain fillers, pigments, fixing of dyes and other substances commonly used in such layers excipients.

In one preferred form of the invention, the ink absorbing layer contains a pigment and a binder in a quantitative ratio from 20:80 to 80:20 (by weight). The amount of pigment in absorbing cher the sludge layer is preferably from 5 to 80 wt.%, but in particular from 10 to 60 wt.%, calculated on the dry weight of the layer.

Pigment may contain any of the materials commonly used for recording information by inkjet printing, but in particular aluminum oxide, aluminum hydroxide, boehmite and silica (for example, obtained by deposition or pyrogenic silicic acid).

The binder may be water-soluble and/or dispersible in water, a polymer, such as polyvinyl alcohol, polyvinylpyrrolidone, polyvinyl acetate, starch, gelatin, carboxymethyl cellulose, copolymers of ethylene with vinyl acetate, styrene-acrylic ester or mixtures thereof.

In the particular form of the invention, the ink absorbing layer is painted the same pigment(s) and/or dye(s), which also painted the paper base.

The amount (concentration) of the coloring pigment(s) and/or dye(s) in the ink absorbing layer, calculated on the weight of the dry absorbent ink layer is preferably from about 45 to 75%, in particular from 45 to 65%, from the amount of coloring pigment(s) and/or dye(s) in paper-based based on the weight of cellulose (absolutely dry).

The weight applied ink absorbing layer can be from 2 to 25 g/m2in particular from 3 to 20 g/m2but preferably from 4 to 15 g/m2. Absorbent ink layer can be naneseniami the methods of application, such as the coating rolls, applying through the slit nozzle, the method of etching or a method of coating through the gap, the coating applied by spray, air-brush method or the method of coating rolls, dosed with a knife.

Suitable resins for impregnation are usually used in this technical field impregnating resin, in particular melamineformaldehyde resin, urea resin, phenol resin, polyacrylate, copolymers of acrylic ester with styrene and polyvinyl alcohol. The amount of resin is from 50 to 300%, preferably from 95 to 150%, based on the density of the decorative base paper.

It was found that with the method according to the invention it is possible not only to avoid the color difference between pressing the raw decorative paper (no ink absorbing layer) and forming a decorative paper with a coating, but also to reduce the number of filler and pigment in paper-based. Hiding power (opacity) of them made decorative paper, provided with absorbent ink layer, pressed the same as the corresponding raw decorative paper base.

The invention is explained more in the following examples.

Examples

Example 1

G is touili suspension of cellulose, crushing the pulp mixture with a consistency of 5%, consisting of 80 wt.% pulp from eucalyptus and 20 wt.% sulphate pulp from pine, to the extent of the grinding, 33°SR with a mixture of pigment/dye (mixture of color 1). Then added 1.8 wt.% epichlorhydrine resin as a wet strength agent. Aluminium sulphate was determined the pH of this suspension of cellulose 6.5-7. Then to the pulp suspension was added a mixture consisting of 40 wt.% titanium dioxide and 5 wt.% talc, 0.11 wt.% holding auxiliary agent and 0.03 wt.% the non, and got coloured decorative base paper with a density of about 80 g/m2and ash content of about 32 wt.% (reference 1). Weight data calculated on the weight of cellulose. The next step was preparing the ink mass for absorbing ink layer with the following composition:

Water80 wt.%
Boehmite10 wt.%
Polyvinyl alcohol : 5 wt.%
The polyvinyl acetate4 wt.%
The Quaternary salt of polyamine1 wt.%

For coloring paint in what erom the batch used the same blend of colors, as in paper-based. This was prepared approximately 5%suspension of pigment/dye in the different dosages were added in the coloring composition. Color formulations with different color intensity was applied each time on a decorative base paper with a weight of the applied layer 6 g/m2(application with a doctor blade/blade 0,2) and dried.

Coloured decorative base paper uncoated (standard 1) was soaked melamineformaldehyde resin. Paper weight after impregnation was 160 g/m2. Then impregnated paper extruded with the base as the laminate (reference sheet 1). Also infiltrated and extruded to laminate the decorative paper of different colors with the floor. Pressing for all kinds of decorative paper was carried out at a temperature of 140°C and a pressure of 9 MPa.

Color space differently colored layered sheets (laminates) was measured with a colorimeter and compared to the color space of the reference sheet 1. As is usual in the manufacture of decorative paper, then use the calculations and empirically selected recipe paints and experience with the staining was repeated. The process was completed after the deviation of the color coordinates between the reference sheet and the laminate of the decorative paper with a coating, as measured by the color contrast of ∆E was less than 0,50. Thus was established optimized mesh pigment/dye for coloring the coloring composition (a mixture of colors 1 opt. I).

Then decorative base paper again covered optimally colored ink absorbing layer with two different weights of the applied layer (3 g/m2and 9 g/m2) (decorative paper 1A and 1B), and the concentration of the ink mixture in the ink absorbing layer was 592% of the concentration of the ink mixture in a decorative paper-based. Decorative paper coated impregnated as described above and extruded in the laminates. Then measured the color space of the leaves and defined color contrast ∆E (table 2).

Example 2

Preparing a suspension of pulp, crushing the pulp mixture with a consistency of 5%, consisting of 80 wt.% pulp from eucalyptus and 20 wt.% sulphate pulp from pine, to the extent of the grinding, 33°SR with the addition of a mixture of pigments (mix colors 2). Then added 1.8 wt.% epichlorhydrine resin as a wet strength agent. Aluminium sulphate was determined the pH of this suspension of cellulose 6.5-7. Then to the pulp suspension was added a mixture consisting of 40 wt.% titanium dioxide and 5 wt.% talc, 0.11 wt.% holding auxiliary agent and 0.03 wt.% the non, and got coloured decorative base paper with a density of about 80 g/m2and ash content of about 32 wt.% (reference 2). Weight data calculated on the weight of cellulose.

In accordance with painted is th decorative paper-the Foundation has established necessary to paint the ink absorbing layer of the mixture of pigment/dye (mixture of color 2, opt. I). The method steps for determining the required quantity of the mixture of pigment/dye in the ink absorbing layer was as in example 1.

Then decorative base paper again covered optimally colored ink absorbing layer with the weight of the applied layer 6 g/m2(decorative paper 2), and the concentration of the ink mixture in the ink absorbing layer was 49,3% of the concentration of the ink mixture in a decorative paper-based.

Decorative base paper uncoated (standard 2) was impregnated as described above and extruded in the laminate (reference sheet 2). Similarly handled decorative paper 2 coated. Then measured the color space of the leaves and defined color contrast ∆E (table 2).

Example 3

A suspension of pulp from 100 wt.% pulp from eucalyptus with a consistency of 5% was ground to the consistency of grind 33°SR with the addition of a mixture of pigments (mixture of 3 colors). Then added 1.8 wt.% epichlorhydrine resin as a wet strength agent. Aluminium sulphate was determined the pH of this suspension of cellulose 6.5-7. Then to the pulp suspension was added a mixture consisting of 40 wt.% titanium dioxide and 5 wt.% talc, 0.11 wt.% holding auxiliary agent and 0.03 wt.% the non, and got coloured decorative base paper with the density of the awn about 80 g/m 2and ash content of about 32 wt.% (reference 3). Weight data calculated on the weight of cellulose.

In accordance with colored decorative paper-the Foundation has established necessary to paint the ink absorbing layer of the mixture of pigment/dye (mixture of 3 colors, opt. I). The method steps for determining the required quantity of the mixture of pigment/dye in the ink absorbing layer was as in example 1.

Then decorative base paper again covered optimally colored ink absorbing layer with the weight of the applied layer 6 g/m2(decorative paper 3), and the concentration of the ink mixture in the ink absorbing layer comprised 50.7% of the concentration of the ink mixture in a decorative paper-based.

Decorative base paper uncoated impregnated as described above and extruded in the laminate (reference sheet 3) in the same conditions as in example 1. Similarly impregnated and extruded decorative paper 3. Then measured the color space of the leaves and defined color contrast ∆E (table 2).

Example 4

A suspension of pulp from 100 wt.% pulp from eucalyptus with a consistency of 5% was ground to the consistency of grind 33°SR with the addition of a mixture of pigments (mixture of 4 colors). Then added 1.8 wt.% epichlorhydrine resin as a wet strength agent. Sulfate brand the Oia has established the pH of this suspension of cellulose 6.5-7. Then to the pulp suspension was added a mixture consisting of 40 wt.% titanium dioxide and 5 wt.% talc, 0.11 wt.% holding auxiliary agent and 0.03 wt.% the non, and got coloured decorative base paper with a density of about 80 g/m2and ash content of about 32 wt.% (reference 2). Weight data calculated on the weight of cellulose.

In accordance with colored decorative paper-the Foundation has established necessary to paint the ink absorbing layer of the mixture of pigment/dye (mixture of 4 colors, opt. I). The method steps for determining the required amount of the mixture in the ink absorbing layer was as in example 1.

Then decorative base paper again covered optimally colored ink absorbing layer with the weight of the applied layer 18 g/m2(decorative paper 4), and the concentration of the ink mixture in the ink absorbing layer was 62.6 per cent concentration ink mixture in a decorative paper-based.

Reference paper 4 was impregnated as in example 1 and extruded in the reference sheet 4. Similarly impregnated and extruded decorative paper 4 is coated. Then measured the color space of the leaves and defined color contrast ∆E (table 2).

Example 5

Preparing a suspension of pulp, crushing the pulp mixture with a consistency of 5%, consisting of 8 wt.% pulp from eucalyptus and 20 wt.% sulphate pulp from pine, to the extent grinding 33°SR with the addition of a mixture of pigments (mixed colors 1). Then added 1.8 wt.% epichlorhydrine resin as a wet strength agent. Aluminium sulphate was determined the pH of this suspension of cellulose 6.5-7. Then to the pulp suspension was added a mixture consisting of 36 wt.% titanium dioxide and 5 wt.% talc, 0.11 wt.% holding auxiliary agent and 0.03 wt.% the non, and got coloured decorative base paper with a density of about 80 g/m2and ash content of about 30 wt.% (reference 5). Weight data calculated on the weight of cellulose.

Then decorative base paper was coated ink absorbing layer, dyed according to example 1 (a mixture of colors 1, opt. I). The weight of the applied layer was 6 g/m2(decorative paper 5).

Reference paper 5 was impregnated as in example 1 and extruded in the reference sheet 5. Also infiltrated and extruded decorative paper 5 from the floor. Then measured the color space of the leaves and defined color contrast ∆E (table 2).

Example 6

A suspension of pulp from 100 wt.% pulp from eucalyptus with a consistency of 5% was ground to the consistency of grind 33°SR with the addition of a mixture of pigments (mixture of 3 colors). Then added 1.8 wt.% epichlorhydrine resin as a wet strength agent. Aluminium sulphate is set and the pH of this suspension of cellulose 6.5-7. Then to the pulp suspension was added a mixture consisting of 36 wt.% titanium dioxide and 5 wt.% talc, 0.11 wt.% holding auxiliary agent and 0.03 wt.% the non, and got coloured decorative base paper with a density of about 80 g/m2and ash content of about 30 wt.% (standard 6). Weight data calculated on the weight of cellulose.

Then decorative base paper was coated ink absorbing layer, dyed according to example 3 (a mix of 3 colors, opt. I). The weight of the applied layer was 6 g/m2(decorative paper 6).

Reference paper 6 was impregnated as in example 1 and extruded in the reference sheet 6. Also infiltrated and extruded decorative paper 6 from the floor. Then measured the color space of the leaves and defined color contrast ∆E (table 2).

Comparative example V1

Decorative base paper from example 1 (reference 1) was coated as described in example 1 ink absorbing layer with the number of the applied layer of 3 g/m2but without dyes and/or pigments (decorative paper V1). Decorative paper coated impregnated, as in the other examples, and extruded in the laminate. Then measured the color space of the sheet and compared to the color space of the reference sheet 1. Defined color contrast ∆E (table 2).

Comparative example V2

ecorative base paper from example 1 (reference 1) was covered with absorbent ink layer, which contained a mixture of pigments/dyes, which were used in decorative paper 1B, but the concentration of 37.7% (mixture of the colors 1, opt. II) the number of the corresponding mixture in the paper-based (table 1). The weight applied ink absorbing layer was 9 g/m2. Further processing of decorative paper impregnation and pressing) was performed, as in the other examples. Then measured the color space of the sheet and compared to the color space of the reference sheet 1. Set the color contrast of ∆E are shown in table 2.

Comparative example V3

Decorative base paper from example 3 (reference 3) was covered with absorbent ink layer which contains a mixture of pigments/dyes, which were used in decorative paper 3, but concentrations 80,7% (mixture of 3 colors, opt. II) the number of the corresponding mixture in the paper-based (table 1). The weight applied ink absorbing layer was 6 g/m2. Further processing of decorative paper impregnation and pressing) was performed, as in the other examples. Then measured the color space of the sheet and compared to the color space of the reference sheet 3. Set the color contrast of ∆E are shown in table 2.

Table 1 summarizes the results for painted decorative paper according to the invention, and for comparative p is Umerov.

Test

Determining the color characteristics of the obtained laminates were made with a colorimeter, model SF 600 firms Datacolor. Was defined color contrast ∆E between the reference sheet and a laminate coated with decorative paper. The color contrast was calculated according to DIN 6174. The calculation is based on the system color space CIE L*a*b*. Measured values of the parameters L*a*b* of the sample and standard, and the color contrast is determined from the following equation:

The less color contrast ∆E, the smaller the difference between the decorative paper, suitable for gravure printing, and suitable for inkjet printing decorative paper, suitable for small series.

To evaluate the opacity was measured color space of the laminates of examples 5 and 6, compared to the color space of the reference sheets 1 and 3 and calculated the difference between opacity ∆ (opacity). At the same colouring the difference between the compared laminates is ∆ (opacity) < 1%.

The measurements were carried out in the following measuring conditions.

Test: CIELab D65 10°, DIN 5033.

Light source: pulsed xenon light, UV filter: 100 physical filtering D65 (close to daylight), the spectral range from 360 nm to 700 nm.

The measurement results are summarized in tables 2 and 3.

Table 2
The results of the test color
ExamplesColor contrast ∆E
Example 1A0,20
Example 1B0,43
Example 20,29
Example 30,37
Example 40,42
Example 50,35
Example 60,38
Comparative example V11,51
Comparative example V20,85
Comparative example V3>2

Table 3
Assessment opacity
Comparison∆ (opacity)
Decorative paper 5 Benchmark 1<1%
Decorative paper 6Standard 3<1%

As can be seen from table 2, all decorative paper obtained according to the invention, has a low color contrast. Savings of titanium dioxide does not cause deterioration of opacity (table 3).

1. Decorative paper materials for decorative coatings, which contains the base paper and the ink absorbing layer, wherein the ink absorbing layer is colored so that the decorative paper after impregnation with the impregnating resin and pressing as the laminate has the same color as the color of the laminate of the decorative paper, no ink absorbing layer, and the ink absorbing layer contains a coloring pigment(s) and/or dye(s) in the amount calculated on the weight of the dry absorbent ink layer comprising from 45 to 75% of the amount of coloring pigment(s) and/or dye(s) in decorative paper-based, is calculated from the mass of absolutely dry pulp.

2. Decorative paper according to claim 1, characterized in that the base paper and the ink absorbing layer is colored identical to the pigment(s) and/or dye(s).

3. Decorative paper according to claim 1, wherein the ink absorbing layer contains the at least one inorganic pigment from the group of metal oxides and/or at least one organic pigment.

4. Decorative paper according to claim 2, characterized in that the ink absorbing layer contains at least one inorganic pigment from the group of metal oxides and/or at least one organic pigment.

5. Decorative paper according to claim 1, wherein the ink absorbing layer contains a pigment and a binder in a quantitative ratio from 20:80 to 80:20.

6. Decorative paper according to claim 3, characterized in that the ink absorbing layer contains a pigment and a binder in a quantitative ratio from 20:80 to 80:20.

7. Decorative paper according to claim 5, characterized in that the pigment may be aluminum oxide, aluminum hydroxide, boehmite and/or silicic acid.

8. Decorative paper according to claim 6, characterized in that the pigment may be aluminum oxide, aluminum hydroxide, boehmite and/or silicic acid.



 

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EFFECT: development of clean and economically effective process of paper base production for vulcanising and parchmentising as well as decrease of environmental pollution.

26 cl, 4 tbl, 3 ex

The invention relates to a method for impregnating decorative paper, intended for the manufacture of highly wear-resistant laminated flooring materials, in which the decorative paper is first moistened and thereby impregnate amenomori, and thus regulate the content of the resin

The invention relates to the production of film materials based on paper and can be used in the manufacture of high-quality low-toxic coated materials, for example, in the manufacture of furniture and standard construction

FIELD: paper-and-pulp industry.

SUBSTANCE: invention provides decorative paper and a method for impregnating decorative paper using alumina and/or silicon carbide particles and fibrous math incorporated into resin.

EFFECT: improved quality of paper.

21 cl

FIELD: construction.

SUBSTANCE: ground contains cation water-fast additive, alkaline glueing agent and anion activator in specified amount. Anion activator it contains is a component selected from group, including polyacrylate, sulfonate, carboxymethylcellulose and galactomannan hemicellulose. Ground paper has pH from approximately 7.0 to approximately 10, and strength of internal link from approximately 25 to approximately 350 millifeet per pound per square inch. This ground paper is produced by contact of a certain amount of cellulose fibres with water-fast additive, alkaline gluing agent and anion activator, serially and/or simultaneously.

EFFECT: improved physical properties of ground paper and expanded assortment of paper tapes to cover joints.

22 cl, 1 dwg, 1 ex

Wear-proof coating // 2407840

FIELD: chemistry.

SUBSTANCE: coating is a matrix material into which a mixture of high-strength particles having an irregular shape and spherical solid particles essentially without cutting edges are added. The high-strength particles have Mohs hardness of at least 6, and the solid particles have Mohs hardness of at least 3, where the average diametre of the solid particles is equal to or less than the average diametre of the high-strength particles. The matrix material is a synthetic resin based on melamine, acrylate, epoxide, polyurethane, polyamide, polyester, polyimide, caoutchouc, rubber or mixtures thereof. Said wear-proof coating can be used to make wear-resistant surfaces on wooden materials, decorative paper or wood-fibre boards having a decorative print, in making parquet floors, laminated floors, furniture surfaces and working surfaces, as well as for making wear-resistant surfaces of layers on substrates made from metal, glass, ceramic, plastic, concrete or other materials.

EFFECT: high wear resistance of the wear-proof coating without increasing wearing of the press plate or belt press.

16 cl, 2 dwg, 6 tbl

FIELD: textiles, paper.

SUBSTANCE: wear proof particles are treated with adhesion promoter based on silane or sylon and then deposited on paper, impregnated with resin, thereby obtaining coating. Fibre is electrically charged and put onto the coating. Drying is then carried out. The device for implementing the given method has a equipment for depositing wear proof particles on paper, equipment for charging fibre and putting the charged fibre onto the paper. The latter consists of a roller with depressions, made with provision for rotating, and a brush mounted near the roller for cleaning the depressions. The device also has apparatus for electrically charging the roller and/or the brush and the roller, which is made with provision for rotation and passing paper sheets under the roller with depressions. Paper, made using this technique, has a wear proof coating and electrically charged fibres on the wear proof coating. The charged fibres used can be made from polyester and/or cotton, and/or cotton linter.

EFFECT: obtaining wear proof paper with improved properties.

14 cl, 3 dwg

FIELD: technological processes; chemistry.

SUBSTANCE: invention can be used to manufacture attrition-resistant paper in production of laminated panels for floor covering. The paper is impregated by resin and contains attrition-resistant particles, consisting of silicium carbide, aluminium and/or corundum oxide. The particles are covered by silaned adhesion activating agent and are built into the resin matrix. The method of paper manufacturing includes impregnating the paper with resin, spreading attrition-resistant particles along, coated by adhesion activatin agent, along the paper, and then curing the resing by pressurising the paper with other impregnated paper, or with fibers and resin along with heating. The device used to spread the particles along the paper includes rotating shaft with recesses and the brush, located near the shaft, and installed so that to sweep the particles out of the recesses, as well as device to move the paperalong under the shaft. Laminated panel consists of ornamental paper, coated by attrition-resistant layer, applied to base plate, made from wood.

EFFECT: increase of paper attrition resistance and simplificaiton of manufacturing method.

11 cl, 3 dwg

The invention relates to a method for impregnating decorative paper, intended for the manufacture of highly wear-resistant laminated flooring materials, in which the decorative paper is first moistened and thereby impregnate amenomori, and thus regulate the content of the resin
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