CN110641173B - Digital thermal transfer printing positioning gold stamping method - Google Patents
Digital thermal transfer printing positioning gold stamping method Download PDFInfo
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- CN110641173B CN110641173B CN201910973812.7A CN201910973812A CN110641173B CN 110641173 B CN110641173 B CN 110641173B CN 201910973812 A CN201910973812 A CN 201910973812A CN 110641173 B CN110641173 B CN 110641173B
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- melt adhesive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/22—Metallic printing; Printing with powdered inks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/10—Intaglio printing ; Gravure printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/12—Stencil printing; Silk-screen printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/26—Printing on other surfaces than ordinary paper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/382—Contact thermal transfer or sublimation processes
Abstract
The invention discloses a digital thermal transfer printing positioning gold stamping method, which comprises the steps of firstly coating a layer of printing slurry on the surface of a gold stamping foil, then printing hot melt adhesive slurry on the surface of the gold stamping foil coated with the printing slurry, then printing disperse dye ink on the gold stamping foil with hot melt adhesive patterns on the surface in a nesting manner, finally attaching the gold stamping foil to a polyester fabric to be printed, and carrying out hot pressing to obtain a positioning gold stamping printed fabric. Compared with the prior art, the invention creatively realizes the positioning gold stamping process of digital heat transfer printing, greatly reduces the environmental pollution, shortens the production flow, improves the production automation degree and reduces the dependence degree on skilled workers; the digital ink-jet printing is used for finishing the coloring and printing part, so that the printed fabric positioning and gold stamping process is suitable for the market demands of small batches and multiple varieties, the production cost is reduced, and the production period is shortened.
Description
Technical Field
The invention belongs to the field of textile printing, and particularly relates to a digital thermal transfer printing positioning gold stamping method.
Background
Textile printing is divided into color printing and special printing. The coloring printing refers to dye printing or pigment printing, and is characterized in that a dye or pigment capable of dyeing textile fabric is applied to a local part of the surface of one side of the textile fabric through a physical or chemical method, and then the dye or pigment is deposited through a physical or chemical reaction, has certain bonding fastness with textile fabric fibers, forms a whole process of local dyeing on the textile, often uses four colors of red, yellow, blue and black as basic colors, and is blended to obtain various colors.
The special printing is to apply some special materials to the surface of the fabric by screen printing, roll coating, hand painting, transferring, electrostatic attraction, even 3D printing and other modes, finally form three-dimensional special effects of gold stamping, high solid, cracking, gold flashing, burnt-out, flocking and the like, and greatly increase the added value of the fabric. The most common gold stamping process is used, various gold colors, silver colors and laser interference effects are stamped on the fabric, and the market is particularly popular in recent years.
The digital thermal transfer printing refers to that disperse dye which is easy to sublimate at high temperature is ground together with a diffusant to certain fineness to prepare CMYK multicolor ink which can be sprayed and painted through a piezoelectric type nozzle, the CMYK multicolor ink is sprayed and painted on paper coated with an ink absorption layer to form a printing pattern under the control of a computer according to needs, the pattern paper is attached to a polyester fabric after being dried, the temperature and the pressure are increased, the disperse dye is sublimated and is dyed on the polyester fabric, and the process is called the digital thermal transfer printing of the polyester fabric. The method has the advantages of energy conservation and emission reduction, vivid pattern, simple and convenient production and the like. From the above description, it is known that digital thermal transfer belongs to the field of color printing.
The gold stamping printing in the special printing is generally to print gold stamping glue on a gold stamping film through a gravure printing, attach the gold stamping film printed with the gold stamping glue to a fabric, heat and press the gold stamping film and the fabric, finally tear off the gold stamping film, and attach the gold stamping glue and an aluminum plated layer on the gold stamping film to the fabric simultaneously to emit high gloss such as gold, silver, or laser interference. However, the gold stamping process has the biggest defect that the local part of the pattern cannot be subjected to the positioning gold stamping process according to the requirement of the pattern; for example, when the printing flower is a flower, the golden color is thermoprinted at the flower core of the flower or the golden color is thermoprinted at the outline of the flower, so that the visual comfort degree of the printing fabric is greatly improved, and the product additional value of the printing fabric is improved.
Chinese patent 201410464495.3 discloses a positioning gold stamping method for textile fabric, which is to print disperse dye gravure printing ink and water-based hot melt adhesive on the surface of a gold stamping film at one time through a gravure by using a multicolor gravure printing machine, attach the printed gold stamping film and polyester fabric, place the gold stamping film and the polyester fabric in a thermal sublimation transfer printing machine, sublimate the disperse dye at 200 ℃, simultaneously apply a gold stamping process, and combine the two processes together at one time. However, this process has several disadvantages, one is that the dye of the color printing part must be printed by using gravure printing, because of the high cost of gravure plate making, high pollution, and the production cost of this process is extremely high; in addition, the process is not suitable for the market demands of small-batch and multi-variety, the market increasingly requires quick response to printed products along with the gradual maturity of network sales, and the small-batch, multi-variety and low cost enable digital printing to be accepted by the market more and more, so that the positioning gold stamping of the digital printing heat transfer printing also has great market demands.
Therefore, how to realize the local positioning gold stamping of patterns on the digital heat transfer printing fabric on the polyester fabric involves improving the visual comfort of the printed fabric and improving the sale price of the printed fabric, and especially has important significance in realizing product differentiation and improving market competitiveness when market competition is increasingly fierce at present.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a digital thermal transfer printing and positioning gold stamping method for a polyester fabric aiming at the defects of the prior art, so that the pattern part of the digital thermal transfer printing and coloring printing of the polyester fabric can be subjected to positioning gold stamping printing, and the product added value of the printed fabric is increased.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a digital thermal transfer printing positioning gold stamping method comprises the following steps:
(1) selecting a pattern, carrying out color separation by using color separation software, and dividing the whole pattern into two parts, wherein one part is a gold stamping printing part, and the other part is a coloring printing part; the gold stamping printing part is separately subjected to color separation to form a spot color, and the spot color is made into a gravure plate or a silk plate for gold stamping;
(2) coating a layer of printing paste on the surface of the hot-melt adhesive foil, drying, printing the hot-melt adhesive paste on the surface of the hot-melt adhesive foil coated with the printing paste by a gravure printing plate or a silk-screen printing plate for hot stamping in the step (1), and drying to obtain the peelable hot-melt adhesive foil with the hot-melt adhesive patterns on the surface;
(3) installing the peelable gold foil with the hot melt adhesive pattern on the surface in the step (2) on an ink-jet printer, printing the disperse dye ink of the coloring and printing part on the peelable gold foil with the hot melt adhesive pattern on the surface in the step (2) in a precise registration manner by using the ink-jet printer according to the pattern requirement under the control of a computer, and drying to obtain the digital heat transfer gold foil containing the hot melt adhesive;
(4) attaching the digital thermal transfer gold stamping foil containing the hot melt adhesive in the step (3) to the polyester fabric to be printed, putting the polyester fabric into a blanket-belt type thermal transfer machine, adjusting the transfer temperature and the speed, starting the thermal transfer machine, heating and sublimating the disperse dye on the gold stamping foil under the action of the temperature, and transferring and dyeing the disperse dye on the polyester fabric; meanwhile, the hot melt adhesive is heated and melted, and is adhered to the surface of the fabric, but because the pressure of the transfer printing machine is insufficient, the adhesion fastness of the hot melt adhesive and the polyester fabric is not enough, then the fabric and the gold stamping foil which are adhered together enter the gold stamping machine for pressing and stamping, under the action of pressure and temperature, the hot melt adhesive permeates into the polyester fabric, the polyester fabric is cooled, the transfer carrier of the gold stamping foil is removed, the hot melt adhesive on the transfer carrier and the hot stamping bright layer on the surface of the gold stamping foil are completely stripped off to the polyester fabric, and finally the printed fabric with positioned gold stamping is obtained;
or (3) the digital heat transfer printing transfer gold foil containing the hot melt adhesive is attached to the polyester fabric, the polyester fabric is placed into a flat plate pressing machine, heating and pressurizing are carried out, under the action of temperature and pressure, the disperse dyes on the transfer carrier are heated and sublimated and transferred to and dyed on the polyester fabric, the hot melt adhesive is heated and melted, the hot melt adhesive is adhered to the surface of the fabric, the transfer carrier is removed, most of the disperse dyes on the transfer carrier are transferred and dyed on the polyester fabric, and the hot melt adhesive is completely peeled off and transferred to the fabric, so that the printed fabric with positioning gold stamping is obtained.
In the step (1), the same pattern of the gravure plate or silk plate for gold stamping and the same pattern of the ink-jet printing pattern of the coloring printing are completely consistent in pattern and size, and accurate overprinting can be realized.
In the step (1), black and white film photoresist methods are adopted in the early stage of gravure printing, silk printing or rotary screen printing, and most of the methods adopt computer-controlled laser printing methods due to the development of computer technology in recent years, so that energy is saved, emission is reduced, plate-making errors are reduced, and overprinting precision of subsequent digital inkjet printing is improved.
In the step (2), the gold stamping foil is also called as an alumite, is a hot stamping material prepared by coating and vacuum evaporation plating a layer of metal foil on a polyester film, has a plurality of gold and silver colors, and gradually develops various color metal light colors and laser interference patterns and designs and colors; the invention relates to a hot stamping foil, which is a general name of a plating metal layer or a coating layer of a roll mark and is a general name of a bright layer for convenience of explanation, wherein the bright layer can be gold, silver, various colors and printing colors of electroplated metal aluminum, and also can be various pearly colors, transparent colors, black, various colors and printing colors of the roll mark.
In the step (2), the hot melt adhesive has various types, all of which have thermoplasticity and are insoluble in water, and can be changed into fluid with adhesiveness at high temperature, and organic polymers which recover solid after cooling can be used as the hot melt adhesive; the hot melt adhesive is divided into two types, one type is a high molecular substance which can be dissolved in an organic solvent to form a pasty fluid and comprises a polyurethane hot melt adhesive, a polyester hot melt adhesive, a polyamide hot melt adhesive and the like, and the hot melt adhesive can be directly dissolved in the organic solvent to form a hot melt adhesive slurry and then printed on a hot foil coated with a printing slurry; one is a high molecular substance which is insoluble in any organic solvent but can be ground into fine powder at low temperature, and comprises PA hot melt powder, PES hot melt powder, EVA hot melt powder and the like, and the high molecular substance is mixed with an organic solvent or water, thickened into slurry containing the hot melt powder by using the organic solvent or an aqueous thickening agent and then printed on the gold foil coated with the printing slurry; although the water-based hot melt adhesive has differences from the solvent method and the hot melt powder method in various aspects such as gold stamping fastness, gold stamping hand feeling, cost and the like, in recent years, the environmental protection requirement is more and more strict, the usage amount of the water-based hot melt adhesive is more and more large, and the main varieties of the water-based hot melt adhesive at present comprise water-based polyurethane emulsion, water-based acrylate emulsion, water-based EVA adhesive emulsion and the like; of course, the hot melt powder is blended into the solvent type hot melt adhesive slurry and the water type hot melt adhesive slurry, and the method is also a very good method for improving the gold stamping fastness.
In the step (2), the printing paste is a viscous paste obtained by dissolving a water-soluble high molecular substance in water; the water-soluble high molecular substance is various, and any substance that can be used as a thickener in a printing process can be used in the present invention, and includes natural substances such as gum arabic, sodium alginate, and the like; starch hydrolysates, such as yellow dextrin, white dextrin, printing glues, and the like; starch etherates or cellulose etherates, such as sodium carboxymethyl starch, hydroxypropyl starch, and sodium carboxymethyl cellulose, hydroxypropyl methyl cellulose, and the like; synthetic substances such as acrylic thickeners, polyacrylamides, and the like; etherified seed gums, such as etherified guar gum and the like.
In the step (2) and the step (3), firstly, a gravure or silk screen or a rotary screen is used for printing hot melt adhesive for gold stamping, then, coloring printing dye is printed on an inkjet printing machine in a precise registration mode, or, the coloring printing dye is printed on the inkjet printing machine, and then, the gravure or silk screen or rotary screen is used for overprinting the hot melt adhesive for gold stamping;
in the step (3), when the inkjet printing sleeve is used for printing the coloring dye, commercially available thermal sublimation disperse dye inkjet ink can be purchased, and the thermal sublimation disperse dye inkjet ink is prepared by grinding easily sublimable disperse dye to a certain fineness and then adding a proper amount of dispersing agent, humectant and deionized water;
in the step (4), the gold stamping machine consists of a heatable metal roller, a pressurizing rubber roller, a transmission device and a pressurizing device; the diameter of the metal roller and the pressure roller is 150 mm-600 mm, the pressure roller is a rubber roller with a metal inner core and a rubber outer coating, and the thickness of the rubber is generally 10 mm-40 mm.
The two ends of the central shaft of the pressure roller are connected with a pressure device through bearings, the pressure device is a sliding block connected with an oil cylinder or an air cylinder, and the sliding block can slide up and down in the sliding groove track under the action of oil pressure or air pressure, so that the pressure roller is close to the metal roller to pressurize or is far away from the metal roller to remove pressure. Two ends of the central shaft of the metal roller are connected to the frame of the thermal transfer printer through bearings, and one end of the central shaft of the metal roller is connected with a transmission device.
Wherein, the metal roller adopts one of the following three structures to realize heating:
(1) the metal roller is internally provided with an electric heating pipe which is electrically heated;
(2) the metal roller is internally provided with a heat conduction oil pipeline, the heating pipeline is communicated with an external heat storage oil device, and hot oil is circularly introduced for heating;
(3) and a steam pipeline is arranged in the metal roller, is communicated with an external steam pipe, and is circularly introduced for heating.
The temperature of the metal roller can be adjusted from room temperature to 250 ℃ by the heating device.
Has the advantages that:
compared with the prior art, the invention creatively realizes the positioning gold stamping process of digital heat transfer printing, greatly reduces the environmental pollution, shortens the production flow, improves the production automation degree and reduces the dependence degree on skilled workers; the digital ink-jet printing is used for finishing the coloring and printing part, so that the printed fabric positioning and gold stamping process is suitable for the market demands of small batches and multiple varieties, the production cost is reduced, and the production period is shortened.
Detailed Description
The invention will be better understood from the following examples.
Example 1:
(1) selecting flower type, carrying out color separation by using PHOTOSHOP color separation software, dividing the whole flower type into two parts, wherein the flower core part is a gold stamping printing part, and the rest part is a coloring printing part; the gold stamping printing part is separately subjected to color separation to form a spot color, and the spot color is made into a gravure plate for gold stamping;
(2) coating a layer of mixed printing slurry containing 3% of polyacrylamide and 4% of sodium carboxymethylcellulose on the surface of the gold stamping foil, drying, printing 20% of PU hot melt adhesive slurry on the surface of the gold stamping foil coated with the printing slurry through the gravure plate for gold stamping in the step (1) by gravure printing, and drying to obtain the strippable gold stamping foil with the hot melt adhesive pattern on the surface;
(3) installing the peelable gold foil with the hot melt adhesive flower type on the surface in the step (2) on an ink-jet printer, controlling the disperse dye ink of the flower type of the coloring and printing part by a computer, accurately nesting the disperse dye ink on the peelable gold foil with the hot melt adhesive flower type on the surface in the step (2) according to the flower type requirement by using the ink-jet printer, and drying to obtain a digital heat transfer gold foil containing the hot melt adhesive;
(4) attaching the digital thermal transfer gold stamping foil containing the hot melt adhesive in the step (3) to the polyester fabric to be printed, putting the polyester fabric into a blanket-belt type thermal transfer machine, adjusting the transfer temperature to be 190 ℃ and the vehicle speed, ensuring that the thermal transfer time is 18 seconds, starting the thermal transfer machine, heating and sublimating the disperse dye on the gold stamping foil under the action of the temperature, and transferring and dyeing the disperse dye on the polyester fabric; meanwhile, the hot melt adhesive is heated and melted, and is adhered to the surface of the fabric, but because the pressure of the transfer printing machine is insufficient, the adhesion fastness of the hot melt adhesive and the polyester fabric is insufficient, then the fabric and the gold stamping foil which are adhered together enter a gold stamping machine for pressing, the hot melt adhesive permeates into the polyester fabric under the action of the pressure of 15 kilograms per square centimeter and the temperature of 150 ℃, the polyester fabric is cooled, the PET carrier of the gold stamping foil is removed, the hot melt adhesive on the transfer carrier and the hot stamping bright layer on the surface of the gold stamping foil are completely stripped off to the fabric, and finally the printed fabric with positioned gold stamping is obtained;
according to the national standards for textiles and decorative fabrics (GB19817-2005) and the national standard for the basic safety technical specification of the national textile products (GB18401-2003) as well as GB/T3922-2013, the color fastness to perspiration in the color fastness test of textiles, GB/T3921-2008, the color fastness to soaping in the color fastness test of textiles, GB/T8427 and 1998, the color fastness to artificial light in the textiles, and the like, the various fastness indexes of the colored printing part patterns after printing are shown in the table 1, wherein the light fastness is 8 grades, the grade 1 is the worst, and the grade 8 is the best. The rest are 5 grades, the grade 1 is the worst, the grade 5 is the best, and the following table is the same.
TABLE 1
| Sun drying | Water washing (60 ℃ C.) | Ironing (150 degree centigrade) | Water stain | Sweat stain | Dry friction | Wet friction |
| 4-5 | 4 | 3 | 4-5 | 4-5 | 4-5 | 4 |
The method uses a Martindale method for testing the wear resistance of the fabric as an alternative method for the gold fastness; the wear resistance fastness of the gold stamping part is measured to be 3-4 grade according to GB/T1196.1-2007 determination of the wear resistance of fabrics by Martindale method.
Example 2:
(1) selecting a leaf pattern, carrying out color separation by using Jinchang color separation software, and dividing the whole pattern into two parts, wherein vein stems in the leaves are gilt printing parts, and the rest parts are coloring printing parts; the gold stamping printing part is separately color-separated into a spot color, and the spot color is made into a rotary screen printing plate for gold stamping;
(2) coating a layer of printing paste containing 5% of etherified guar gum on the surface of a black section film, drying, adding 25% of water-based acrylic hot melt adhesive paste into 10% of EVA hot melt powder with the fineness of 0-80 microns through screen printing to obtain hot melt adhesive paste, printing the hot melt adhesive paste on the surface of the black section film coated with the printing paste through the rotary screen printing plate for gold stamping in the step (1), and drying to obtain the strippable black section film with the hot melt adhesive pattern on the surface;
(3) installing the strippable black cut film with the hot melt adhesive flower on the surface in the step (2) on an ink-jet printer, controlling the disperse dye ink with the leaf flower type on the coloring and printing part by a computer, accurately nesting the disperse dye ink on the strippable black cut film with the hot melt adhesive flower on the surface in the step (2) according to the flower type requirement by using the ink-jet printer, and drying to obtain a digital heat transfer black cut film containing the hot melt adhesive;
(4) attaching the digital thermal transfer black cut film containing the hot melt adhesive in the step (3) to a polyester fabric to be printed, putting the polyester fabric into a blanket-belt type thermal transfer machine, adjusting the transfer temperature to be 180 ℃ and the vehicle speed, ensuring the transfer time to be 25 seconds, starting the thermal transfer machine, heating and sublimating the disperse dye on the gold stamping foil under the action of temperature, and transferring and dyeing the disperse dye on the polyester fabric; meanwhile, the hot melt adhesive is heated and melted, and is adhered to the surface of the fabric, but because the pressure of the transfer printing machine is insufficient, the adhesion fastness of the hot melt adhesive and the polyester fabric is not enough, then the fabric and the gold stamping foil which are adhered together enter a gold stamping machine for pressing, under the action of the pressure of 20 kilograms per square centimeter and the temperature of 150 ℃, the hot melt adhesive permeates into the polyester fabric, the PET carrier of the black cut film is cooled, the hot melt adhesive on the transfer carrier carries the hot stamping bright layer on the surface of the cut film to be completely stripped off to the fabric, and finally the printed fabric with positioned gold stamping is obtained;
according to the national standards for textiles and decorative fabrics (GB19817-2005) and the national standard for the basic safety technical specification of the national textile products (GB18401-2003) as well as GB/T3922-2013, the color fastness to perspiration in the color fastness test of textiles, GB/T3921-2008, the color fastness to soaping in the color fastness test of textiles, GB/T8427 and 1998, the color fastness to artificial light in the textiles, and the like, through tests, the various fastness indexes of the colored printed partial patterns after printing are shown in the table 2.
TABLE 2
| Sun drying | Water washing (60 ℃ C.) | Ironing (150 degree centigrade) | Water stain | Sweat stain | Dry friction | Wet friction |
| 6 | 4-5 | 3-4 | 4-5 | 4-5 | 4-5 | 4-5 |
The method uses a Martindale method for testing the wear resistance of the fabric as an alternative method for the gold fastness; the wear resistance fastness of the gold stamping part is measured to be 4 grade according to GB/T1196.1-2007 determination of the wear resistance of fabrics by Martindale method.
Example 3:
(1) selecting a circular pattern, and performing color separation by using chameleon color separation software, wherein the whole pattern is divided into two parts, the edge of the circle is a gold stamping printing part, and the circle is a coloring printing part; the gold stamping printing part is separately subjected to color separation to form a spot color, and the spot color is made into a silk screen printing plate for gold stamping;
(2) coating a layer of printing slurry containing 4% of sodium alginate and 3% of yellow dextrin on the surface of the transparent cut-face film, and drying to obtain the transparent cut-face film with the printing slurry on the surface;
(3) installing the transparent cut-surface film with the printing paste layer on the surface in the step (2) on an ink-jet printer, controlling the disperse dye ink of the circular patterns of the coloring and printing part by a computer, printing the disperse dye ink on the transparent cut-surface film with the printing paste layer on the surface in the step (2) by using the ink-jet printer according to the pattern requirement, and drying to obtain the transparent cut-surface film with the printing patterns;
(4) pasting the transparent cut-off film with the printed pattern obtained in the step (3) on a silk screen platform, adding 10% of hot melt adhesive slurry consisting of glitter powder with the fineness of 0.1 mm into methyl propyl ketone solution containing 40% of polyester hot melt adhesive, using the silk screen printing plate in the step (1), accurately overprinting the hot melt adhesive slurry on the transparent cut-off film, and drying to obtain the digital heat transfer printing transparent cut-off film containing hot melt adhesive;
(5) and (3) attaching the digital heat transfer transparent cut film containing the hot melt adhesive in the step (4) to the polyester fabric, putting the polyester fabric into a flat plate pressing machine, heating to 185 ℃, pressurizing to 18 kg/square centimeter, heating to sublimate the disperse dye on the transfer carrier and transferring and dyeing the disperse dye onto the polyester fabric under the action of temperature and pressure, heating to melt the hot melt adhesive, adhering the hot melt adhesive to the surface of the fabric, removing the transfer carrier, transferring and dyeing most of the disperse dye on the transfer carrier onto the polyester fabric, and completely stripping and transferring the hot melt adhesive onto the fabric to obtain the printed fabric with positioning gold stamping.
According to the national standards for textiles and decorative fabrics (GB19817-2005) and the national standard for the basic safety technical specification of the national textile products (GB18401-2003) as well as GB/T3922-2013, the color fastness to perspiration in the color fastness test of textiles, GB/T3921-2008, the color fastness to soaping in the color fastness test of textiles, GB/T8427 and 1998, the color fastness to artificial light in the textiles, and the like, through tests, the various fastness indexes of the colored printed partial patterns after printing are shown in the table 3.
TABLE 3
| Sun drying | Water washing (60 ℃ C.) | Ironing (150 degree centigrade) | Water stain | Sweat stain | Dry friction | Wet friction |
| 5 | 4 | 3 | 4 | 4-5 | 4 | 3-4 |
The method uses a Martindale method for testing the wear resistance of the fabric as an alternative method for the gold fastness; the wear resistance fastness of the gold stamping part is measured to be 3 grade according to GB/T1196.1-2007 determination of the wear resistance of fabrics by Martindale method.
The invention provides a thought and a method of a digital heat transfer printing positioning gold stamping method, and a method and a way for realizing the technical scheme are many, the above description is only a preferred embodiment of the invention, it should be noted that, for a person skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the invention, and the improvements and decorations should also be regarded as the protection scope of the invention. All the components not specified in the present embodiment can be realized by the prior art.
Claims (7)
1. A digital thermal transfer printing positioning gold stamping method is characterized by comprising the following steps:
(1) selecting a pattern, carrying out color separation by using color separation software, and dividing the whole pattern into two parts, wherein one part is a gold stamping printing part, and the other part is a coloring printing part; the gold stamping printing part is separately subjected to color separation to form a spot color, and the spot color is made into a gravure plate or a silk plate for gold stamping;
(2) coating a layer of printing paste on the surface of the hot-melt adhesive foil, drying, printing the hot-melt adhesive paste on the surface of the hot-melt adhesive foil coated with the printing paste by a gravure printing plate or a silk-screen printing plate for hot stamping in the step (1), and drying to obtain the peelable hot-melt adhesive foil with the hot-melt adhesive patterns on the surface;
(3) installing the peelable gold foil with the hot melt adhesive pattern on the surface in the step (2) on an ink-jet printer, printing the disperse dye ink of the coloring and printing part on the peelable gold foil with the hot melt adhesive pattern on the surface in the step (2) in a precise registration manner by using the ink-jet printer according to the pattern requirement under the control of a computer, and drying to obtain the digital heat transfer gold foil containing the hot melt adhesive;
(4) attaching the digital thermal transfer gold stamping foil containing the hot melt adhesive in the step (3) to the polyester fabric to be printed, putting the polyester fabric into a blanket-belt type thermal transfer machine, adjusting the transfer temperature and the speed, starting the thermal transfer machine, heating and sublimating the disperse dye on the gold stamping foil under the action of the temperature, and transferring and dyeing the disperse dye on the polyester fabric; meanwhile, the hot melt adhesive is heated and melted, and is adhered to the surface of the polyester fabric, but because the pressure of the transfer machine is insufficient, the adhesion fastness of the hot melt adhesive and the polyester fabric is not enough, then the adhered fabric and the gold stamping foil enter a gold stamping machine for pressing and stamping, under the action of pressure and temperature, the hot melt adhesive permeates into the polyester fabric, the polyester fabric is cooled, a PET carrier of the gold stamping foil is uncovered, the hot melt adhesive on the PET carrier and the hot stamping bright layer on the surface of the gold stamping foil are completely stripped off from the polyester fabric, and finally the printed fabric with the gold stamping positioned is obtained;
or (3) attaching the digital heat transfer gold foil containing the hot melt adhesive to the polyester fabric, putting the polyester fabric into a flat plate pressing machine, heating and pressurizing, heating and sublimating the disperse dye on the PET carrier under the action of temperature and pressure, transferring and dyeing the disperse dye on the polyester fabric, heating and melting the hot melt adhesive, adhering the hot melt adhesive to the surface of the polyester fabric, removing the PET carrier, transferring and dyeing most of the disperse dye on the PET carrier to the polyester fabric, and completely stripping and transferring the hot melt adhesive to the polyester fabric to obtain the printed fabric with positioning and gold stamping.
2. The digital thermal transfer printing and positioning gold stamping method according to claim 1, wherein in the step (1), the same pattern of the gravure plate or silk plate for gold stamping is completely consistent with the pattern and size of the colored and printed ink-jet printing, and the pattern and size can be precisely overprinted.
3. The digital thermal transfer printing, positioning and gold stamping method according to claim 1, wherein in the step (2), the printing paste is a viscous paste obtained by dissolving a water-soluble high molecular substance in water; the water-soluble high molecular substance is one or a mixture of more than two of dragon gum, Arabic gum, sodium alginate, yellow dextrin, white dextrin, printing and dyeing glue, polyacrylamide, sodium carboxymethyl starch, hydroxypropyl starch, sodium carboxymethyl cellulose, hydroxypropyl methyl cellulose, an acrylic acid thickener and etherified guar gum.
4. The digital thermal transfer printing, positioning and gold stamping method according to claim 1, wherein in the step (2), the hot melt adhesive slurry is polyurethane hot melt adhesive, polyester hot melt adhesive, polyamide hot melt adhesive, or hot melt powder slurry made of PA hot melt powder, PES hot melt powder, EVA hot melt powder.
5. The digital thermal transfer printing, positioning and gold stamping method according to claim 1, wherein in the step (3), the disperse dye ink of the coloring and printing part is disperse dye easy to sublimate, and is prepared by grinding the disperse dye ink to a certain fineness and then adding a proper amount of dispersing agent, humectant and deionized water.
6. The digital thermal transfer printing, positioning and gold stamping method according to claim 1, wherein in the step (4), the gold stamping machine consists of a heatable metal roller, a pressurizing rubber roller, a transmission device and a pressurizing device; the diameters of the metal roller and the pressurizing rubber roller are 150 mm-600 mm, the pressurizing rubber roller is a rubber roller with an inner core made of metal and an outer coating made of rubber, and the thickness of the rubber is 10 mm-40 mm.
7. The digital thermal transfer printing, positioning and gold stamping method according to claim 6, wherein in the step (4), an electric heating pipe, a heat conduction oil pipeline or a steam pipeline is arranged in the metal roller; the temperature of the metal roller can be adjusted from room temperature to 250 ℃.
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| CN113103767B (en) * | 2021-04-14 | 2022-08-16 | 苏州市锦展数码科技有限公司 | Method for performing mixed printing and thermal transfer printing by adopting multiple jet printing materials |
| CN115008935B (en) * | 2022-06-09 | 2023-09-05 | 广东高义包装科技股份有限公司 | Process capable of improving hot stamping precision |
| CN115071299B (en) * | 2022-08-09 | 2023-12-05 | 吴江翔丰丝绸整理有限公司 | Renewable thermal transfer process |
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