Paper base to make materials for formation of decorative coating

FIELD: textile, paper.

SUBSTANCE: paper base is designed to form a decorative material of a coating. It represents a non-processed paper containing a white pigment and/or fillers and is coated with a covering solution, containing at least one water-soluble modified starch with special distribution of molecules according to molecular weight. Also a decorative paper or decorative material is proposed to form coatings with application of the above-specified paper-base.

EFFECT: improved quality of a finished product due to increased inner strength of fixation with high non-transparency and other mechanical properties, improved stability of paper size stability and increased average size of its pores.

7 cl, 2 tbl, 6 ex

 

The invention relates to paper-based, suitable for impregnation with thermosetting synthetic resins, and to decorative materials obtained from it, to form a coating.

Decorative materials (so-called decorative paper or decorative film) for forming coatings preferably used for coating surfaces in the manufacture of furniture and interior, in particular for laminating flooring for floors. It should be clear that under the decorative paper/decorative film refers to printed or potichomania paper impregnated with synthetic resin or impregnated with synthetic resin and subjected to surface treatment. Decorative paper/decorative film is attached to the carrier panel with glue or adhesive.

Depending on the nature of the process of impregnation of decorative paper/decorative film can be divided into paper with a fully saturated core and the so-called pre-impregnated paper, and in this case, the paper is only partially impregnated directly in the manufacture of the paper machine or in a separate process outside of the paper machine. It should be clear that under the pre-impregnated paper refers to paper that is partially impregnated with the resin, where the Dol the resin is from 10 wt.% up to 35 wt.% from the weight of the raw paper.

To attach the decorative film to the wooden materials, such as chipboard plate (DSP) or a wood-fiber plate medium density (dpsp)typically use adhesives urea-based or polyvinyl acetate (PVA) adhesives. Laminates high pressure laminates are formed by pressing several impregnated laid foot layers of paper. The design of these high pressure laminates usually consists of the upper transparent layer through which provide the maximum possible surface resistance; decorative paper impregnated with resin; and one or more layers of Kraft paper coated with phenolic resin. For example, solid fibreboard (MDF) and chipboard (particle Board)and plywood plates are usually used as a substrate.

In the case of lamination plates produced by the method with short cycle laminating low pressure), decorative paper, impregnated with synthetic resin, pripressovyvajut directly to the substrate, such as wood-shaving plate (DSP), using low pressure.

Decorative paper used together with the above-mentioned materials for forming coatings used in unpainted (white) or colored (color), printed or neotitanium status is Janie.

For impregnation of decorative raw paper are commonly used resins based on urea, melamine or phenolic resins and resins containing formaldehyde. However, all in large quantities using resin, free from substances harmful to human health, in particular synthetic resin that is free of formaldehyde, based on copolymers of styrene and of ester of acrylic acid.

When considering the use of technical parameters raw decorative paper used as the source material, it should be borne in mind that it should meet certain requirements. These requirements include high opacity for the best frozen substrate; uniformity in the formation and uniform surface density sheet for homogeneous absorption resin; high light resistance, high purity and homogeneity of color for a good reproducibility of the picture, subject to the application of the method of printing; high strength in wet condition to ensure a smooth process of impregnation; the corresponding absorptive capacity to achieve the necessary degree of saturation of the resin; strength in the dry state, are important during the operation of the rewinding of the paper machine and during printing on the printing machine. In addition, re is an important internal bonding strength, because it is a measure of the ease with which you can process raw decorative paper. Thus, the decorative paper/decorative film attached with glue, should not razlohmachivayutsya during processing, for example, by sawing or drilling.

For producing a decorative surface raw decorative paper printing. Prerequisites for obtaining a satisfactory printed image with a small error and high intensity colors are high opacity; smooth and homogeneous surface topography and well-coordinated absorption of ink by the paper surface.

For this reason, raw decorative paper usually iron on so-called soft calenders, partly also using the so-called Janus calenders. Such processing may cause wrinkling of the paper surface and subsequently to its seal, which has a negative impact on the absorption of resin.

The above-mentioned properties are strongly affected by the impregnation of the raw decorative paper, i.e. the type of impregnating substances (sealing resin).

The use of resins based on urea, melamine resins or phenolic resins commonly used for impregnation of the raw decorative, the second paper results in brittle products with a small strength of raster and unsuitable for printing.

The opacity required for decorative paper, which clearly defines the content of titanium dioxide, partially lost as a result of impregnation of synthetic resin. Although the loss of opacity can be compensated by increasing the content of titanium dioxide, losing the strength of the paper. This problem can be solved according to European patent EP 0964956 A1 by pre-impregnation of the raw paper to be impregnated with a mixture of water-insoluble polymer, in particular a copolymer of vinyl acetate and ethylene, and water-soluble alcohol, in particular polyvinyl alcohol. However, the paper pre-soaked in a way that requires further processing to improve its internal bonding strength and intensity of treatment.

The aim of the invention is the creation of a base paper for decorative materials to form a coating, which does not have the above disadvantages and has good propityvaetsya and good mechanical properties, in particular high internal bonding strength. At the same time, high opacity paper should be stored.

To reach this aim by using a base paper containing the her raw paper, containing from 5 wt.% up to 55 wt.% white pigment and/or filler, where the paper is covered with a coating solution containing at least one water-soluble modified starch with a molecular weight distribution expressed by the index polydispersity Mw/Mn, comprising from 10 to 25. Modified starches with index polydispersity constituting from 15 to 23, are preferred.

In a specific embodiment of the invention the raw paper cover with water covering solution containing at least one water-soluble modified starch with a molecular mass of molecules of starch, preferably in the following ranges of average molecular mass (Mw):

- a maximum of 6 wt.% molecules with a molecular mass of from 0 g/mol to 1000 g/mol, in particular from 1 wt.% up to 5 wt.%;

from 5 wt.% up to 20 wt.% molecules with a molecular weight of from 1000 g/mol to 5000 g/mol, in particular from 7 wt.% up to 18 wt.%;

from 20 wt.% up to 40 wt.% molecules with a molecular weight of from 5000 g/mol to 25,000 g/mol, in particular from 20 wt.% up to 30 wt.%;

from 20 wt.% up to 45 wt.% molecules with a molecular weight of 25,000 g/mol to 200,000 g/mol, in particular from 30 wt.% up to 45 wt.%;

from 6 wt.% to 22 wt.% molecules with a molecular weight of 200,000 g/mol to 1,000,000 g/mol, in particular from 10 wt.% to 22 wt.%;

from 0.5 wt.% to 5.0 wt.% molecules with molecules of the nuclear biological chemical (NBC weight of more than 1,000,000 g/mol, in particular from 1 wt.% up to 5 wt.%.

Usually the ratio of mass-average molecular weight to srednetsenovoj molecular weight, Mw/Mn is taken for the index polydispersity. This index provides information about the width of the distribution curve of molecular weight.

The distribution of molecular weight of modified starches was determined by the manufacturer of starch in the usual way by means of gel chromatography (GPC). Analyses using GPC was performed using a chromatograph with columns Shodex KS. As lentago substances used 0.05 M NaOH with a flow rate of 1 ml/min Calibration was made using standard pullulan with known molecular masses.

Modified starch used according to the invention, can be applied separately or in the form of a mixture of various starches with similar distribution of molecular masses in the previously described ranges. However, it can also be used in a mixture with additional water-soluble polymers, for example polyvinyl alcohol. It is established that in this case is particularly beneficial use of polyvinyl alcohols with a degree of saponification of 88 mol.% up to 98 mol.%.

Water-soluble modified starch used according to the invention, preferably is starch, which does not form a film with an average molecular mA the Soi preferably from 100000 g/mol to 250000 g/mol. Film-forming starches commonly used for sizing the paper surface is not suitable for use according to the invention.

Modified starch used according to the invention, preferably used in opaque solution in an amount of from 20 wt.% to 100 wt.%; however, the use in an amount of from 50 wt.% to 100 wt.% and, in particular, from 70 wt.% to 100 wt.%, it is preferable. Quantitative values refer to dry weight of the coating, respectively.

In an additional embodiment of the invention covering solution may contain additional components in an amount of from 1 wt.% up to 30 wt.%, in particular from 2 wt.% up to 20 wt.%. Quantitative values refer to the weight of the binder in the absolutely dry state (ACC). The term "binder" should be understood modified starch according to the invention or a mixture of several modified starches, if necessary, also in a mixture with other water-soluble polymers.

As additional features, you can use inorganic pigments, for example titanium dioxide, talc, calcium carbonate and/or kaolin; organic pigments; dyes; viscosity regulators; defoamers and other additives suitable for use in the paper industry.

The total solids content in opaque solution, use the reception for the manufacture of base paper according to the invention, calculated on dry basis, is from 5 wt.% up to 30 wt.%, preferably from 15 wt.% up to 25 wt.%, in particular, however, from 20 wt.% up to 25 wt.%.

During the preparation of opaque solution first, cook the starch, which is dissolved in water or in cold water, i.e. at room temperature, up to a maximum of 60C, and/or in boiling water at a temperature of from about 120C to 145C. During this process serves approximately 35% to 45% solution with a pH value of from 5 to 6. This solution was diluted with water to the desired solids content.

In an additional step, you can enter additional components and/or additives in the form of an aqueous solution or dispersion.

Raw decorative paper is paper, not glued neither inside nor outside. The paper consists essentially of the fibrous mass, pigments and fillers, and conventional additives. Conventional additives can be substances that increase the strength in wet condition; retaining agents and fixing agents. Raw decorative paper differs from paper normal type is much higher equity content of the filler or pigment and the absence of any internal sizing or surface sizing, conventional paper.

The raw paper to be impregnated according to the invention may contain the larger share of the pigment or filler. The proportion of filler in the raw paper can be up to 55 wt.%, in particular from 8 wt.% up to 45 wt.% from the surface density of the paper. Suitable pigments and fillers are, for example, titanium dioxide, talc, zinc sulfide, kaolin, aluminum oxide, calcium carbonate, aluminum oxide, aluminum silicate and magnesium silicate or mixtures thereof.

The pulp of soft wood (fiber weight of long fibers and/or fibrous masses of solid wood (fibrous mass of short fibers) can be used as a fibrous mass for the manufacture of raw paper. You can also use cotton fiber and its mixtures with the above-mentioned types of the fibrous mass. The use of a mixture of pulp of soft wood and/or fibrous masses of solid wood in a ratio of from 10:90 to 90:10, in particular from 20:80 to 80:20, particularly preferably. However, it is established that the use of 100% fibrous mass of the solid wood is also beneficial. Quantitative values refer to the weight of the fibrous mass in the absolutely dry state (ACC).

The mixture of the fibrous mass may also contain a proportion of cation-modified cellulose fibers, comprising at least 5 wt.% by weight of the mixture of the fibrous mass. Found that if the proportion of cation-modified the cellulite, tighten the importance of fiber is from 10 wt.% up to 50 wt.%, in particular from 10 wt.% up to 20 wt.%, in the mixture of the fibrous mass, it is especially favorable. Cationic modified cellulose fibers can be produced by the interaction of the fiber with epichlorhydrine resin and a tertiary amine or by interaction with the Quaternary ammonium chlorides, for example, chlorodibromomethane ammonium or glycidylmethacrylate ammonium. Cation-modified fibrous mass and the methods of their production are known, for example, from the publication of DAS PAPIER, issue 12 (1980), pp. 575-579.

The raw paper can be produced on clinocerinae paper machine "Furdrine or at PM the Yankees. To this end, the mixture of the fibrous mass may be ground when the initial concentration of 2 wt.% up to 5 wt.% to achieve the degree of grinding of from 10SR to 45SR (Shopper Rigler). In a mixing pool you can add fillers, such as titanium dioxide and talc, and substances that increase the strength in wet condition, and thoroughly stirred with a mixture of fibrous mass. It is established that in the case of the manufacture of raw paper according to the invention the use of substances that increase the strength in the wet state, in the amount of 0.8 wt.% up to 2.0 wt.%, in particular from 1.0 wt.% up to 1.8 wt.%, by weight of the fibrous mass in the absolute is cosy dry condition (ACC), particularly beneficial. Fibrous mass of high density, thus obtained, can be diluted to a concentration of source material, which constitutes approximately 1%, and, if necessary, it can enter, carefully mixing, additional excipients, such as retention agents, defoamers, aluminum sulfate and other above-mentioned excipients. This fibrous mass of low density putting on wire section through a headbox of the paper machine. Form a fibrous cloth and, after dehydration, get the raw paper, which is then dried. The surface density of the produced paper can range from 15 g/m2to 200 g/m2. However, particularly suitable raw paper weighing 40 g/m2to 100 g/m2.

Application coverts solution to be used according to the invention, can be produced on a paper machine or outside by spraying, dipping, use the shafts or doctor blade coating. Particularly preferably used presses for applying glue or presses for applying the film. Covering solution can be applied to the raw paper in an amount of from 1 g/m2up to 15 g/m2(ACC). Since the surface density of the paper p is edocfile should not be changed in the coating, part of the pulp in the manufacture of paper replace the opaque substance according to the invention.

Drying the paper with the coating carried out in the usual way by using the infrared drying or roller drying in the temperature range from 120C to 180C to achieve a residual moisture content of 2% to 8%.

After drying the paper with the coating according to the invention is subjected to printing and impregnation, and then laminated to various substrates, such as wood particle boards (chipboard or hardboard (wood fiberboard)using conventional methods.

In the impregnation of the paper base thermosetting resins according to the invention any reduction of opacity is not happening. The paper has a high internal bonding strength. As with other mechanical properties, such as the breaking load of the wet and breaking strength in dry condition, it should be noted that we have relatively good or even better results than the results achieved using existing technologies.

Using opaque substance applied on paper, reduce the swelling of the fiber in contact with liquids and, thus, reduce the paper size is changed in the transverse direction (x direction), in predolin the m direction (direction y) and thickness direction (z direction). In particular, this reduces the change of size in the z-direction, decreasing in the volume of paper to be filling the resin, which is favourable during the impregnation of paper impregnating resin. Paper with more stable dimensions, thus, serves as a very suitable base for subsequent application of the impregnating resin, resulting in a lower demand for the resin to get busy in the impregnation of the core layer. It is established that the decrease in the number of resin is directly proportional to the number of fibers in the paper.

In addition, it was found that, despite the creation of the coatings according to the invention does not reduce the size of the pores in the paper canvas. On the contrary, with the increase in the number of opaque materials applied to the paper web, and while maintaining the same surface density of the paper web increases unexpectedly, the average pore size.

An additional advantage is that the base paper can be produced when the machine is running at high speeds - up to 1200 m/min Speed of impregnation of synthetic resins can also be increased so as to maintain the optimum time of penetration. The term "penetration time" shall mean the time required for standard impregnating resin penetrated open bratney side of the paper to the front side of the paper without application of pressure.

The following examples provide further illustration of the invention. Values, expressed in wt.%, refer to the weight of the fibrous mass, unless otherwise noted. Under the equity content understand mass shared content and/or the weight of the equity content.

Examples

Example 1

Preparing a suspension of a fibrous mass by milling a mixture of a fibrous mass consisting of 80 wt.% eucalyptus fibrous mass and 20 wt.% pine sulphate fibrous mass at a concentration of source material 5% to achieve the degree of grinding of 33SR (Shopper Rigler). Then added 1.8 wt.% epichlorohydrine resin as substances that increase the strength in the wet state. the pH of this suspension of the fibrous mass is brought up to a value of 6.5, using aluminum sulfate. Then in the suspension of the fibrous mass was added a mixture consisting of 30 wt.% titanium dioxide and 5 wt.% talc, 0.11 wt.% retaining substances and 0.03 wt.% antifoam, then produced raw decorative paper weighing approximately 73 g/m2and ash content of approximately 23 wt.%. These values refer to the weight of the fibrous mass in the absolutely dry state (ACC).

This raw paper was coated on the press for gluing, using water covering solution containing t is rejeski modified maize starch (starch I, see table 1), (CAS 9004-53-9). This starch is available for purchase in the form of freely pouring a white powder, which in addition to the characteristic distribution of molecular weight was different in that its moisture content was 11.5%; pH - 6.5; viscosity Brookfield (100 rpm) 185 MPas (batches heat treatment, 25% solution, 40C).

Opaque solution was applied using four different fractional number. The solids content in the opaque solution was to about 20 wt.%. To this end, first prepared 45% starch mixture and diluted with water to a concentration of 20 wt.%, pouring a solution of starch in water, and the potatoes were boiled for 2 min at 125C using water vapor. The solution is then diluted with water to a concentration of 20 wt.%.

Paper coated and then dried at a temperature of about 120C to achieve a residual moisture content of 2.5%. The surface density of the coating after drying was 2.1 g/m2(example 1A), 4.9 g/m2(example 1B), 9,8 g/m2(example 1C) and 14.5 g/m2(example 1D).

Example 2

On the raw paper from example 1 was coated on the press for gluing, using water covering solution containing thermally modified maize starch (starch II, see table 2), (CAS 9004-53-9). This starch is available for purchase in the form of freely supluses the Xia of white powder, which in addition to the characteristic distribution of molecular weight was different in that its moisture content was 10.5%, the pH - 6,25, the viscosity Brookfield (100 rpm, Sp 2) 170 MPas (batches heat treatment, 15% solution, 40C).

Preparation of starch produced in the same way as in example 1. The solids content in the opaque solution was made up to 25 wt.%.

Paper coated and then dried at a temperature of about 120C to achieve a residual moisture content of 2.5%. The surface density of the coating after drying was 4.8 g/m2.

Example 3

On raw paper made in the same way as in example 1, but from 100% eucalyptus fiber mass was coated on the press for gluing, using water covering solution containing starch I, as in example 1. The solids content in the coverts of the solution amounted to approximately 20%.

Paper coated and then dried at a temperature of about 120C to achieve a residual moisture content of 2.5%. The surface density of the coating after drying was 5 g/m2.

Comparative example V1

On the raw paper from example 1 was coated on the press for gluing, using water covering solution containing starch III(C-Film 07380)(see table 1). The solids content in the coverts is aStore amounted to about 20 wt.%.

Paper coated and then dried at a temperature of about 120C to achieve a residual moisture content of 2.5%. The surface density of the coating after drying was to 5.1 g/m2.

Comparative example V2

On the raw paper from example 1 was coated on the press for gluing, using water covering solution containing a film-forming starch (C-Film05731). The solids content in the opaque solution was to about 20 wt.%. Preparation of starch produced in the same way as in example 1.

Paper coated and then dried at a temperature of about 120C to achieve a residual moisture content of 2.5%. The surface density of the coating after drying was to 5.1 g/m2.

Comparative example V3

On the raw paper from example 1 was coated on the press for gluing, using water covering solution containing polyvinyl alcohol (Mowiol4-98) and a copolymer of vinyl acetate and ethylene (Vinamul3265 company Celanese) in the ratio 10:90. The solids content in the opaque solution was to about 10 wt.%.

Paper coated and then dried at a temperature of about 120C to achieve a residual moisture content of 2.5%. The surface density of the coating after drying was 5 g/m 2.

In the following table 2 shows the test results of the paper treated according to the invention, in comparison with the results of the test paper produced using existing technology. Has identified the following typical properties.

The internal bonding strength

The internal bonding strength was measured using a device for determining the internal fasteners, in accordance with the method TAPPI T 569 (TAPPI - Technical Association of paper industry of the USA).

The tests were carried out using the device EMCO IBT to determine the internal bond, where the structural strength of the paper was measured in the z-direction.

These measurement values are indicated in j/m2.

Smoothness

The definition of smoothness conducted in accordance with the method of DIN 53 107 (TAPPI sm 48) (DIN - German industrial standard). During the test measured the time during which a certain amount of air passed through the paper sample and polished glass panel.

Air permeability (garli)

The purpose of the test was to determine the porosity of the structure of the paper. During these tests measured the time required for the passage of a certain amount of air through the surface of the paper at a constant pressure. The measurements were made using a densitometer model 121D of the company L&W. the Unit and the intent is gerli/100 ml

The breaking load in the dry state

Measurement was made according to the method DIN EN ISO 1924-2, using a tensile machine model 40 company FDP (EN - European standard; ISO - international organization for standardization).

The breaking load in a wet state

Measurement was made according to the method DIN ISO 3781, using a tensile machine model 40 company FDP.

Penetration

By determining the penetration was determined by the behavior of the base paper during impregnation. Penetration understand the time during which the paper is impregnated with resin in the direction perpendicular to the plane of the paper. The tests were made, using as a test liquid melamine resin MW550, 50%, without a curing agent and a crosslinking agent.

As shown in table 2, the paper base according to the invention has a higher internal bonding strength, a higher breaking load in a wet state and tenacity in the dry state. The time of penetration also significantly improved in the case of base paper according to the invention in comparison with the prototype. The opacity of paper saved.

Table 1
Modified starches
Distribution Mw, g/molStarch IStarch IIStarch III
0-10004,421,8312,20
1000-500016,367,6334,41
5000-2500028,6822,5947,50
25000-20000035,5442,74of 5.89
200000-100000012,520,710,00
1000000-50000002,484,500,00
>50000000,020,000,00
Index polydispersity22,319,045,2

49,7
Table II Test results
Test1A1B1C1D2V1V2V3
Strength internal bond (bond Scott, j/m2)217282554908278232298198
Smoothness Bekk2926272932253713
Vazduhoplovni-
water resistance (garli)/100 cm3)
26,6039,3084,80158,00104,122,3089,6040,00
The gap is the first load in the dry state, in the longitudinal direction,
N/15 mm
47,90to 66.3055,2061,1054,739,1051,1043,70
The breaking load in a wet state, in the longitudinal direction,
N/15 mm
10,1916,2016,2716,2016,468,499,1410,08
Penetration from the back side,0,51,03,04,51,55,58,06,0
Absorption resin, %7671603869726670
Cobb (water, 60s, DIN EN 20535) on the reverse side, g/m251,445,843,4---45,2

1. Base paper for decorative materials for the formation of coatings suitable for impregnation with thermosetting resin containing the raw paper, containing 5 wt.% up to 55 wt.% white pigment and/or fillers, characterized in that it contains at least one water-soluble modified starch in which the starch molecules with an average molecular weight are as follows:
a maximum of 6 wt.% molecules with a molecular mass of from 0 to 1000 g/mol;
from 5 to 20 wt.% molecules with a molecular weight of from 1000 to 5000 g/mol;
from 20 to 40 wt.% molecules with a molecular weight of from 5000 to 25000 g/mol;
from 20 to 45 wt.% molecules with a molecular weight of from 25,000 to 200,000 g/mol;
from 6 to 22 wt.% molecules with a molecular weight of 200000 to 1000000 g/mol;
from 0.5 to 5 wt.% molecules with a molecular weight of more than 1,000,000 g/mol.

2. The paper base according to claim 1, characterized in that the covering solution additionally contains a water-soluble polymer.

3. The paper base according to claim 1, characterized in that the amount of modified starch in opaque solution is from 20 to 100 wt.% from the mass in the absolutely dry state.

4. Base paper for P3, characterized in that the covering solution contains additional components in an amount of from 1 to 30 wt.% from the mass in the absolutely dry state.

5. The paper base according to claim 1, characterized in that the covering solution contains solid matter in an amount of from 20 to 25 wt.%.

6. The paper base according to claim 1, characterized in that the covering solution applied with a surface density in the absolutely dry state from 1 to 15 g/m2on the raw paper.

7. Decorative paper or decorative material to form a coating derived from a base paper according to claim 1.



 

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16 cl, 2 dwg, 6 tbl

FIELD: chemistry.

SUBSTANCE: substrate has a paper base containing cellulose fibre from deciduous wood with particle size smaller than 200 mcm after grinding in amount of not more than 45 wt % and average fibre length between 0.4 and 0.8 mm and filler in amount of 5-40 wt %, particularly 10-25 wt % in terms of the weight of cellulose.The substrate at least contains one polymer layer lying at least on one side of the paper base. There is a layer with a binding agent between the polymer layer and the paper base. The binding agent is a hydrophilic film-forming polymer made from hydroxypropylated starch and/or thermally modified starch. This layer may contain a pigment in form of calcium carbonate, kaolin, talc, titanium dioxide and/or barium sulphate.

EFFECT: reduced limpness and obtaining pure-bred production wastes.

27 cl, 3 tbl

FIELD: process engineering.

SUBSTANCE: invention relates to production of flooring boards with decorative surface and high wear resistance coats. Proposed method comprises the following jobs: a) making board (1) with decorative surface consisting of wood material; b) applying thermoset base layer (2); c) applying wear-resistant particles (3) of aluminium oxide and/or emery on damp base layer; d) applying cover layer (8) on wear-resistant particles (3) and still damp base layer; e) curing of both said layers (2, 8). Aforesaid layers are acrylate coats based on polyurethane or aliphatic polyester.

EFFECT: higher wear resistance.

17 cl, 1 dwg

FIELD: woodworking industry.

SUBSTANCE: material comprises fibrous base from craft paper with applied impression of desirable printing dye with impregnation by resin or mixture of resins coloured into a desired colour. Impregnation with resin or mixture of resins is carried out prior to application of impression or after application of impression. Fibre base is soaked with application of one or more layer of resin. Resin or mixture of resins is selected from group, which contains phenol, amine, acryl and/or other similar resins. Coating material is produced by method, where resin or mixture of resins is used, and craft paper is used as fibre base. Resin or mixture of resins are coloured using desired dye. Impression is applied onto craft paper, using desirable printing dye, and impregnated, using specified resin or mixture of resins.

EFFECT: improved strength of coating material and high colour resistance to light and temperature.

18 cl, 4 tbl, 2 ex

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: paper industry.

SUBSTANCE: base paper for decorative coating materials contains 10 to about 65% of pigment, which includes silicon- and aluminum-modified titanium dioxide in combination with another, white pigment. Titanium dioxide-based pigment is characterized by oil capacity at least 25% and solubility in sulfuric acid at least 15% TiO2. Invention also provides decorative paper or decorative film containing above base paper.

EFFECT: increased opacity of base paper at lower consumption of titanium dioxide.

7 cl, 1 tbl, 8 ex

FIELD: papermaking.

SUBSTANCE: pre-impregnate is manufactured by impregnation of crude paper with thermosetting formaldehyde-free resin until content thereof 10 to 70%. Residual moisture content in pre-impregnate is 2-3%. Resin contains: at least one radical-polymerization polymer with less than 5% of α,β-ethylenically unsaturated mono- or dicarboxylic acid; at least one radical-polymerization polymer containing more than 5% of α,β-ethylenically unsaturated mono- or dicarboxylic acid; and at least one alkanolamine with at least two hydroxyl groups; or resin contains at least one radical-polymerization polymer with 5-100%, particularly 5-50%, or more particularly 10-40% of α,β-ethylenically unsaturated mono- or dicarboxylic acid and at least one above alkanolamine.

EFFECT: improved quality of surface, printing properties, delamination resistance, and varnishing capacity.

16 cl, 3 dwg, 2 tbl, 2 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

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

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: textile industry, paper industry.

SUBSTANCE: method (version) relates to production of paper base meant for vulcanising and parchmentising and can be used in paper-pulp industry. The method includes the following stages. Energy radiation of cellulose fiber in dry condition. Grinding and refining of irradiate fiber in aqueous media till homogeneous fiber solution is prepared. Formation of web from prepared fibrous suspension, which is dewatered and dried to prepare paper base. According to another version, after paper web forming paper base is exposed to radiation to decrease polymerisation degree of fiber.

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

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