Thermal transfer paper for printing with sublimation ink

FIELD: technological processes.

SUBSTANCE: this paper for printing consists of base and coating applied on it, which contains binding agent and filler. At that components are contained with preset proportion. As binding agent coating contains substance selected from the group that includes starch, carboxymethylcellulose, polyvinyl alcohol, gelatine and their mixtures. As filler coating contains substance selected from the group that includes calcium sulfoaluminate, fine-grained starch, talc, silica gels and their mixture. Mass of coating on paper base amounts to 10-25 g/m2. Possibility occurs to use thermal transfer paper in production of different items with firmly printed colour images, both with application of jet printing method and typography printing methods.

EFFECT: provision of high rate of ink drying and images printed with them on paper in the complete range of ink densities.

4 cl, 3 tbl, 3 ex

 

The invention relates to the pulp and paper industry and can be used in the manufacture of thermal transfer of the securities.

Known two-layer material for thermal transfer printing of images, including a flexible first layer, for example cellulose non-woven fabric (paper), and a second layer deposited on the first layer and the associated, for example, using glue or heat.

The second layer is a fabric derived from natural or synthetic polymer, for example, using blowing from the melt of the polyamide with a melting point of from 90 to 250 degrees C.

The second layer is treated with a composition containing water and a substance, for example, polyvinyl alcohol or polyoxyethylene, which increases the viscosity of the ink for inkjet printing on the surface of the second layer to obtain a solid printed image on it.

The transfer of the printed image on the cloth is done by moving the molten second layer weight not less than 10 g/m2using heat and pressure. (EN, application 99122675/12, publ. 10.10.2001,).

The disadvantage of this material is related to the fact that the image is transmitted to the host tissue together with a polymer film with a fused it with dyes.

In the image on fabric with low contrast, rasplivchitae boundaries CEE is impressive. In addition, colorful image on the final textile product quickly destroyed along with bearing the image of the polymer film by mechanical action on the product, for example when washing.

Closest to the proposed paper to the technical essence and purpose is thermal transfer paper for inkjet printing, consisting of a paper base and a deposited barrier coating containing a binder is sodium carboxymethyl cellulose, polyvinyl alcohol, gelatin or mixtures thereof, and the filler is kaolin or talc in the following ratio of components (in weight):

binder - 100, filler 17,6.

On this coating by means of inkjet printing special sublimation ink is applied to the image, dried under certain conditions for some time and then under the influence of heat and pressure at the contact paper bearing a printed image, with the cloth is put on this fabric (U.S. Pat. U.S. No. 6902779, IPC VM 5/40, publ. 07.06.2005,).

The disadvantages mentioned paper are slow drying of the ink deposited on the barrier coating, resulting in high densities of fill to Otmar ink on the reverse side of the paper when winding it into a roll, mixing some of the colors on the boundary of these colors in process printing, that is, proniknovenie is one color ( 1-2 mm) in a region with a different color, causing a decrease in contrast of the print, and not enough high ceskootchy when thermal transfer printed images.

In addition, the quality of printing on paper and, accordingly, the images on the fabric depends on the type of dye sublimation ink.

The technical result achieved by using the proposed invention is a high-speed processes of absorption and drying of ink, high-contrast lines section of colors due to the exclusion of mixing colors on the dividing lines, the exception otmerivanija colors in rolls and when transferring images to fabric, a higher degree of ceskootchy when thermal transfer on fabric, use all known types of sublimation ink when printing on high-speed plotters.

This technical result is achieved in that thermal transfer paper comprising base paper and a coating containing a binder and a filler, and a binder taken from the group of substances comprising carboxymethylcellulose, polyvinyl alcohol, gelatin and mixtures thereof, and the filler taken from the group of substances comprising talc, kaolin, according to the invention contains a binder and filler in the coating composition when following their ratio (parts by weight):

binder - 100, filler 30-500.

Binder m which may include one of the following substances or the mixture of these substances in any combination of: carboxymethylcellulose and polyvinyl alcohol; carboxymethylcellulose and gelatin; gelatin and starch.

The group of binders used in the coating further comprises starch.

The group of fillers used in the coating further comprises sulfoaluminate calcium, silica, fine starch and mixtures of these substances.

The coating weight on the paper-based is 10-25 g/m2.

Thermal transfer paper is prepared as follows.

In the mixer-reactor prepare a specified amount of an aqueous solution of a binder, a certain concentration. Then in the solution with vigorous stirring served a specified number of filler. After cessation of the filler mixture is stirred for 10-15 min and filtered.

The resulting composition applied to the base paper weighing from 60 to 110 g /m2in coater by any known method. Coating weight can be from 10 to 25 g/m2.

Example 1.

On the basis of the applied coating, containing (wt. h)

- binder - carboxymethylcellulose - 15;

- polyvinyl alcohol - 70;

-gelatin - 15;

- filler - kaolin - 20, talc - 10.

Example 2.

On the basis of the applied coating containing (parts by weight)

- binder - carboxymethylcellulose - 100;

- filler - kaolin - 250.

Example 3.

On the basis of the applied coating containing (parts by weight)

- binder is a starch - 50;

<> carboxymethylcellulose - 25;

- polyvinyl alcohol - 15;

- gelatin - 10;

- filler - kaolin - 300, sulfoaluminate calcium - 50, talc - 25, silicagel - 50, fine (deklassirovanniy) starch - 75.

Test samples thermal transfer paper obtained by the proposed method is as follows.

Printing samples sublimation inks of different type (Manoukian, Expressio, CIBA) is performed on the plotter brand Mimaki JV22-160, JV4-160 at densities of fill from 100 to 400%. At the same time, that is absolutely in the same conditions, sealed samples of the paper prototype Coldenhove Jetcol company Coldenhove (Netherlands).

To further assess the quality of thermal transfer paper produced according to the invention, as well as to determine the possibility of its application for the sealing of images on high-speed plotters new generations used designed for this special method.

In this method, poster pen width of 12-15 mm was carried out on the subjects of securities (including the paper prototype) with the same speed and pressure strips ink of different colors and types. The amount of ink in the pen in all cases was the same and enough in the band were zones of all possible densities fill ink.

In our tests the density of the fill line gradually changed the t maximum (similar to 800% fill) at the beginning of the line to the minimum (10-15% fill) at its end.

Specific density value of the fill zones poster lines approximately determined when comparing the duration of drying of the ink to the disappearance of otmerivanija paint with lines, sealed on the plotter, such as the disappearance of otmerivanija in zones poster lines with similar densities fill. The comparison of the speed of drying of the ink with a high density of fill on the securities according to the invention and prototype all other things being equal of tapecheck and images on the fabric after thermal transfer shows the advantage of one or the other of the paper when printing on high-speed plotter.

In addition to speed (duration) of the ink is dry, when testing all papers when printing recorded and compared the following characteristics:

- uniformity of staining images directly in printing on the plotter or banner pen (possible appearance of ripples, bars, minimization of paints, impregnation of the paper);

- maintaining the uniformity and density of staining in the absorption process - drying ink;

- the contrast of the boundary lines of the same color or dividing lines of two colors (at high densities fill possible "mahavastu" lines of the same color or dividing lines of two colors, the flow of ink of the same color in ink of a different color when printing on the plotter);

- Paul the PTA drying of ink in the valid time interval between the sealant and the wound sealed web of paper in a roll.

When thermal transfer qualitatively sealed on the plotter image on the cloth was fixed with the following characteristics:

the degree of dye transfer from paper to fabric;

- brightness and density of the ink images on the fabric;

- occurrence of image defects on the fabric, not available on sealed paper.

Table 1 shows the parameters of coated paper examples.

Table 2 shows the characteristics of the sealing images on paper by examples and prototype. The performance of the seal on the paper prototype accepted for standard and marked with "*". For papers according to the invention, the characters ">" or "=" to indicate that the indicator exceeds the corresponding figure for the paper prototype or equal to.

Table 3 compares the degree of dye transfer from paper to fabric, as well as the quality of the images on the fabric when used for thermal transfer papers according to the invention and prototype. The meaning of icons similar to the one used in table 2.

In table 2 and 3 shows data when printing lines poster pen. In the initial part of the line density fill approximately 800%.

Based on the values of the duration of drying can be assumed that the ink on the paper prototype with high density fill (up to 400%) will not have time to dry before ischeznovenie is of Otmar valid for the period of time between the printing of images on a high-speed plotter to collapse the paper into a roll.

On the basis of these tables, we can conclude that the paper produced stated in the offer, all indicators are not inferior or superior to the paper prototype. A significantly higher rate of absorption process-drying ink while maintaining high performance sealed on paper and transferred to the fabric of the images allows the use of high-density fill, achieved, for example, when seal on the high-speed plotters new generations.

Thus, the paper according to the invention can be used when printing images with any degree of fill on the plotters different models with the subsequent receipt of final products (e.g., tissue products transferred to them by images of high quality. Seal image on thermal transfer paper for further transfer to the fabric as possible using the methods of inkjet printing and typographic printing methods.

Table 1.
Characteristics of the coated paper examples
no examples123
Weight of base paper, g/ m26090110
Coating weight, g/m2101825

Table 2.
The sealing characteristics of images on paper by examples
No.Print modeUniformityDurationClarity
examplecoloringdryingborders
diceink uplines
disappearance
of Otmar (withoutcolors
forced(contrast
heated),on the fill
min800%)
1a)=2=
2a)=1 =
b)>2>
in)3
3a)>0,5=
b)>1,5>
in)>2>
The placeholdera)*6*
b)*10*
Jetcolin)*12*
2000
Jetcola)*4=
5000b)*8>
in)*10>
a) 360 dpi × 360 dpi 2 pass
b) 360 dpi × 540 dpi 3 pass
in) 360 dpi × 740 dpi 4 pass

Table is CA 3.
The degree of dye transfer from the paper to the fabric and the quality indexes transferred on the fabric images with the use of paper for examples and prototype.
no examplesThe degree of migration of the dye in %The brightness of colors in the image (visually)The image defects
1 (a)===
2 (a)===
2 b)>>>
3 (a)===
3 b)>>>
3)>>>
The prototype Jetcol 2000
a)***
b)***
in)***
The prototype Jetcol 5000
a)===
the) ==>
in)==>
Refer to modes (a), b), C) shown in table 2.

1. Thermal transfer paper for sublimation printing ink consisting of a substrate and a coating containing a binder and a filler, and a binder taken from the group of substances comprising carboxymethylcellulose, polyvinyl alcohol, gelatin and mixtures thereof, and the filler taken from the group of substances comprising talc, kaolin, characterized in that the binder and filler in the coating contains at following their ratio, parts by weight:

binder100
filler30-500

2. thermal transfer paper according to claim 1, characterized in that the group of binders further comprises starch.

3. thermal transfer paper according to claim 1, characterized in that the group of fillers further comprises sulfoaluminate calcium, silica, fine starch and mixtures of these substances.

4. thermal transfer paper according to claim 1, characterized in that the coating weight is from 10 to 25 g/m2.



 

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FIELD: textiles, paper.

SUBSTANCE: paper or cardboard of improved rigidity and bulk are meant for reproducing equipment and the method refers to production of the said paper and cardboard. The paper or cardboard has the core layer and starch-based layers applied by gluing-up on its both sides forming the uniform canvas of the double-T structure. The layers cover the upper and the lower surface of the central layer with minimal penetration to the central layer. The starch contains the filler spreading to the central layer. The starch has high content of solid products. The mass of the coating layers is 2-10 g/m2. Method for producing paper or cardboard includes the following stages: a) creation of composition containing cellulose fibers and the filler, b) formation of fibrous canvas, c) drying of the fibrous canvas, d) processing by gluing-up both sides of the dried canvas with the starch with filler and e) drying of the fibrous canvas with formation of the three-layer making the uniform canvas material with the double-T structure.

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30 cl, 2 dwg, 3 tbl, 3 ex

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EFFECT: resistance to fluffing and whiteness of the coating with considerable lowering of consumption of the binding substance when making the composition.

1 tbl

FIELD: textiles; paper.

SUBSTANCE: composition is designed for refining fibrous material, can be used in the production of enamelled cardboard and paper and relates to the cellulose-paper industry. The composition contains a modified pigment and a water soluble binding substance. The pigment is calcium sulfoaluminate, modified starch or polyvinyl alcohol with mass ratio content of 0.5-1.5. The water soluble binding substance is starch.

EFFECT: resistance to fluffing and whiteness of the coating with considerable lowering of consumption of the binding substance when making the composition.

1 tbl

FIELD: textiles; paper.

SUBSTANCE: composition is designed for refining fibrous material, can be used in the production of enamelled cardboard and paper and relates to the cellulose-paper industry. The composition contains a modified pigment and a water soluble binding substance. The pigment is calcium sulfoaluminate, modified starch or polyvinyl alcohol with mass ratio content of 0.5-1.5. The water soluble binding substance is starch.

EFFECT: resistance to fluffing and whiteness of the coating with considerable lowering of consumption of the binding substance when making the composition.

1 tbl

FIELD: textiles; paper.

SUBSTANCE: composition is designed for refining fibrous material, can be used in the production of enamelled cardboard and paper and relates to the cellulose-paper industry. The composition contains a modified pigment and a water soluble binding substance. The pigment is calcium sulfoaluminate, modified starch or polyvinyl alcohol with mass ratio content of 0.5-1.5. The water soluble binding substance is starch.

EFFECT: resistance to fluffing and whiteness of the coating with considerable lowering of consumption of the binding substance when making the composition.

1 tbl

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SUBSTANCE: method relates to obtaining white pigment for making paper and cardboard and is designed for use in paper and cardboard production. The method involves reaction of the suspension calcium hydroxide with a solution of aluminium sulphate in the presence of a modifying agent. The modifying agent used is a salt of carboxymethylcellulose in quantity of 1.0-2.0 mass of white pigment. The modifying agent is put into the dispersion of calcium hydroxide before its reaction with aluminium sulphate solution.

EFFECT: lower viscosity of the pigment dispersion and improved flow characteristics.

FIELD: textiles; paper.

SUBSTANCE: method relates to obtaining white pigment for making paper and cardboard and is designed for use in paper and cardboard production. The method involves reaction of the suspension calcium hydroxide with a solution of aluminium sulphate in the presence of a modifying agent. The modifying agent used is a salt of carboxymethylcellulose in quantity of 1.0-2.0 mass of white pigment. The modifying agent is put into the dispersion of calcium hydroxide before its reaction with aluminium sulphate solution.

EFFECT: lower viscosity of the pigment dispersion and improved flow characteristics.

FIELD: soft wares, paper.

SUBSTANCE: invention concerns polymerous sheet perceiving thermally embossed image, on which with help of pigments or inks heat transmission it is capable to record an image with high contrast and definition. Image-receiving sheet for thermal image transfer contains lamellar basis with perceiving embossing image resinous layer. Current layer is coated by aquatic compound, which includes at least one water-dispersible resin on the basis of aliphatic (polyether)-polyurethane and at least one water-dispersible resin on the basis of aliphatic (polyester)-polyurethane or resin water dispersion on the basis of aliphatic (polyether)-polyurethane, silicon dioxide dispersion and wax anionic aqueous emulsion, and also aquatic coupling agent. Proposed invention provides receiving of perceiving layer with aquatic compounds usage, with image formation of high contrast range and storage stability.

EFFECT: receiving of perceiving layer with aquatic compounds usage, with image formation of high contrast range and storage stability.

20 cl, 1 dwg, 2 tbl, 2 ex

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