CN110143074B - Environment-friendly heat transfer printing film and preparation method thereof - Google Patents
Environment-friendly heat transfer printing film and preparation method thereof Download PDFInfo
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- CN110143074B CN110143074B CN201910447044.1A CN201910447044A CN110143074B CN 110143074 B CN110143074 B CN 110143074B CN 201910447044 A CN201910447044 A CN 201910447044A CN 110143074 B CN110143074 B CN 110143074B
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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
- 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
- B41M5/38207—Contact thermal transfer or sublimation processes characterised by aspects not provided for in groups B41M5/385 - B41M5/395
- B41M5/38214—Structural details, e.g. multilayer systems
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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
- B41M5/385—Contact thermal transfer or sublimation processes characterised by the transferable dyes or pigments
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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
- B41M5/392—Additives, other than colour forming substances, dyes or pigments, e.g. sensitisers, transfer promoting agents
- B41M5/395—Macromolecular additives, e.g. binders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
- B41M7/009—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using thermal means, e.g. infrared radiation, heat
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
Abstract
The invention relates to an environment-friendly heat transfer printing film and a preparation method thereof, belonging to the technical field of heat transfer printing. The environment-friendly heat transfer printing film sequentially comprises a printing carrier, a protective layer, an image-text layer, a background layer and a hot melt adhesive layer from bottom to top, wherein the protective layer is formed by printing a polyurethane resin solution with the solid content of 24% on the surface of the printing carrier, the image-text layer is formed by printing ink on the protective layer, the background layer is formed by printing background slurry on the image-text layer, and the hot melt adhesive layer is formed by coating hot melt adhesive on the background layer. The environment-friendly heat transfer printing film prepared by the invention meets the technical requirements of Q/FJQY 002-2018, the overprinting error is less than or equal to 0.4mm, the same batch homochromatic aberration delta E is less than or equal to 5, the wear resistance is more than or equal to 90 percent, the water washing resistance is less than or equal to 15 percent, and the basic safety technical requirement meets the B-class requirement in GB 18401.
Description
Technical Field
The invention belongs to the technical field of thermal transfer printing, and particularly relates to an environment-friendly thermal transfer printing film and a preparation method thereof.
Background
If printing is required on products such as textile fabrics or leather, the traditional printing process is to make a plate first, screen printing is required to make a silk screen plate, gravure printing is required to make a gravure plate, offset printing is required to make a PS plate, and the defects of low efficiency, high cost and large pollution exist. And the thermal transfer printing can overcome the defects.
The heat transfer printing film is a special functional printing film which is formed by printing pictures on the surface of a carrier film in advance, separating the pictures from the carrier film under the combined action of heating and pressure and firmly adhering the pictures to the surface of a printing stock. With the continuous development of science and technology, the heat transfer printing industry in China has reached a higher level, and the application of the heat transfer printing film is more and more diversified and personalized, at present, the heat transfer printing film is widely applied to trademarks, marks and decorations of clothes, T-shirts, advertising shirts, sportswear, wash labels, gloves, shoes and hats, and luggage textiles.
The thermal transfer printing film is developed to the present, although the process is continuously improved and the product quality is higher and higher, most of the thermal transfer printing films still have the following defects: firstly, the transferred image-text is not bright in color, and the reflected light has no fine and exquisite decorative sense; secondly, the bonding and the combination with part of textiles are not firm, and the labels are easy to be removed; thirdly, the mechanical strength, toughness and elasticity of the hot stamping layer are still unsatisfactory; fourthly, the color is easy to fade by dry friction; fifthly, delamination and decoloration are easy to occur after washing; sixth, the product quality does not meet the increasingly strict environmental protection and safety technical requirements.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the environment-friendly heat transfer printing film and the preparation method thereof.
The invention adopts the following technical scheme:
the invention provides an environment-friendly heat transfer printing film which sequentially comprises a printing carrier, a protective layer, an image-text layer, a background layer and a hot melt adhesive layer from bottom to top, wherein the protective layer is formed by printing a polyurethane resin solution on the surface of the printing carrier, the image-text layer is formed by printing ink on the protective layer, the background layer is formed by printing background slurry on the image-text layer, and the hot melt adhesive layer is formed by coating a hot melt adhesive solution on the background layer.
Furthermore, the quality requirement of the printing carrier needs to meet the technical requirement of Q/FJQY 004-2019, and the solid content of the polyurethane resin solution is 24%.
Further, the background slurry comprises the following components in parts by mass: 5-9 parts of deionized water, 4-8 parts of propylene glycol, 0.5-1.5 parts of water-based wax with 20% of solid content, 0.05-0.08 part of preservative, 0.4-0.7 part of dispersant, 0.05-0.08 part of flatting agent, 0.2-0.5 part of defoaming agent, 51-61 parts of polyurethane emulsion with 50% of solid content, 4-8 parts of white powder, 20-26 parts of titanium dioxide, 0.5-1.5 parts of thickening agent and 0.5-1.5 parts of curing agent.
Further, the deionized water is above 15 megohms.
Furthermore, the hot melt adhesive comprises the following components in parts by weight: 2-4 parts of polyester resin, 2-4 parts of ethyl acetate, 42-48 parts of elastic polyurethane resin powder and 45-57 parts of mixed solvent, wherein the mixed solvent comprises the following components in parts by mass: 35-41 parts of cyclohexanone and 10-16 parts of ethyl acetate.
The invention also provides a manufacturing method of the environment-friendly heat transfer printing film, which comprises the following steps:
the method comprises the following steps: screen printing polyurethane resin solution on the surface layer of the printing carrier to form a protective layer, and printing and coating the protective layer with the dry weight of 0.8-1.2g/m2；
Step two: firstly, preparing a PS printing plate, then printing ink on a protective layer to form an image-text layer, and drying;
step three: preparing background slurry, preparing a screen printing plate, and screen printing the background slurry on the image-text layer to form a background layer;
step four: preparing hot melt glue solution, preparing a screen printing plate, screen printing and coating the hot melt glue solution on the background layer to form a hot melt glue layer, and drying to obtain the environment-friendly thermal transfer printing film.
Furthermore, the silk screen in the first step is a 200-mesh terylene silk screen, and the temperature of a drying oven of a silk screen printing machine is 65-75 ℃ during silk screen printing;
the drying in the second step is specifically as follows: drying in a constant temperature and humidity chamber with humidity less than or equal to 30% at 45-55 deg.C for 8-12 h.
Furthermore, the silk screen in the third step is a 120-mesh terylene silk screen, and the temperature of a drying oven of a silk screen printing machine is 65-75 ℃ during silk screen printing, the printing times are 2 times, and the thickness is 0.04-0.07 mm;
the silk screen in the fourth step is a 100-mesh terylene silk screen, and the temperature of a drying oven of a silk screen printer is 65-75 ℃ during silk screen printing, the printing times are 2 times, and the thickness is 0.10-0.14 mm; the drying in the fourth step is specifically as follows: drying at 65-75 deg.C in constant temperature and humidity chamber with humidity less than or equal to 30% for 35-45 min.
Further, the preparation of the background slurry in the third step is specifically: according to the mass ratio, firstly, 5-9 parts of deionized water, 4-8 parts of propylene glycol, 0.5-1.5 parts of water-based wax with 20% of solid content, 0.05-0.08 part of preservative, 0.4-0.7 part of dispersing agent, 0.05-0.08 part of flatting agent and 0.2-0.5 part of defoaming agent are sequentially added into 51-61 parts of polyurethane emulsion with 50% of solid content, stirred for 3-7min at the rotating speed of 900-1100r/min, then added with 4-8 parts of white powder and 20-26 parts of titanium dioxide, stirred for 3-7min at the rotating speed of 900-1100r/min, then added with 0.5-1.5 parts of thickening agent and stirred for 12-18min at the rotating speed of 1200-1400r/min, mixed uniformly, and added with 0.5-1.5 parts of curing agent before use, and stirred uniformly to obtain the polyurethane emulsion.
Further, the preparation of the hot melt adhesive solution in the fourth step specifically comprises: adding 2-4 parts of polyester resin into 2-4 parts of ethyl acetate according to the mass ratio, soaking for 55-65min, then stirring for 55-65min until the polyester resin is completely dissolved to obtain a dissolved solution, sequentially adding the dissolved solution and 42-48 parts of elastic polyurethane resin rubber powder into a mixed solvent, stirring at the rotating speed of 900-1100r/min for 55-65min, and uniformly mixing to obtain the mixed solvent, wherein the mixed solvent is prepared by mixing 35-41 parts of cyclohexanone and 10-16 parts of ethyl acetate.
Compared with the prior art, the invention has the following beneficial effects:
firstly, the method comprises the following steps: the environment-friendly heat transfer printing film prepared by the invention meets the technical requirements of Q/FJQY 002-containing 2018, the overprinting error is less than or equal to 0.4mm, the same batch homochromatic aberration delta E is less than or equal to 5, the wear resistance is greater than or equal to 90 percent, the water washing resistance is less than or equal to 15 percent, and the basic safety technical requirement meets the B-class requirement in GB 18401;
secondly, the method comprises the following steps: the environment-friendly heat transfer printing film prepared by the invention is non-toxic, tasteless and pollution-free, is an environment-friendly new material for printing cultural products of cultural and artistic industry, and passes the screening test of 197 high concern Substances (SVHC) by the REACH regulation of European Union No. 1907/2006;
thirdly, the method comprises the following steps: the environment-friendly heat transfer printing film prepared by the invention has simple and convenient production process and short production period, and can realize large-scale production;
fourthly: the protective layer of the environment-friendly transfer printing film prepared by the invention not only ensures that clear pictures and texts can be printed, but also ensures that the picture and text layer has better wear resistance, and ensures that the picture and text layer does not delaminate and fade when washed;
fifth, the method comprises the following steps: the background layer can better support the patterns or the colors of the characters on the image-text layer, and the display effect of the image-text layer is enhanced;
sixth: the hot melt adhesive layer has higher adhesive force to printing stocks made of different materials such as textile, leather and the like, so that the hot stamped pictures and texts have higher mechanical strength, toughness and elasticity, and the excellent water washing resistance of the pictures and texts is ensured;
seventh: the offset printing and silk-screen printing methods and specific technological parameters are adopted to complete all the procedures, so that the coating uniformity is ensured, and quantitative coating is realized.
Drawings
FIG. 1 is a schematic structural diagram of an environmentally friendly thermal transfer printing film according to the present invention;
wherein: 1. printing a carrier; 2. a protective layer; 3. an image-text layer; 4. a background layer; 5. a hot melt adhesive layer.
Detailed Description
The present invention is described in further detail below by way of specific embodiments, but those skilled in the art will appreciate that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention.
The main raw materials and reagents used in the present invention are as follows:
TABLE 1 Main raw materials and reagents
Example 1
As shown in fig. 1, the invention provides an environment-friendly thermal transfer printing film, which sequentially comprises a printing carrier 1 (the quality requirement needs to meet the technical requirement of Q/FJQY 004-.
The background slurry comprises the following components in parts by weight: 7 parts of deionized water with the weight of more than 15 megaohms, 6 parts of propylene glycol, 1 part of water-based wax with the solid content of 20 percent, 0.07 part of preservative, 0.5 part of dispersant, 0.07 part of flatting agent, 0.3 part of defoamer, 56 parts of polyurethane emulsion with the solid content of 50 percent, 6 parts of whiting, 23 parts of titanium pigment, 1 part of thickener and 1 part of curing agent.
The hot melt adhesive comprises the following components in parts by weight: 2 parts of polyester resin, 2 parts of ethyl acetate, 45 parts of elastic polyurethane resin powder and 51 parts of mixed solvent; the mixed solvent comprises the following components in parts by weight: 38 parts of cyclohexanone and 13 parts of ethyl acetate.
The method for manufacturing the environment-friendly thermal transfer printing film comprises the following steps:
the method comprises the following steps: printing a polyurethane resin solution with the solid content of 24% on the surface layer of the printing carrier 1 by a screen printer to form a protective layer 2, wherein the terylene screen is 200 meshes, the oven temperature of the screen printer is 70 ℃, and the printing and coating dry weight is 1.0g/m2；
Step two: firstly, preparing a PS printing plate, then printing CMYK printing ink on the protective layer 2 by using an offset color press to form an image-text layer 3, and drying for 10 hours in a constant temperature and humidity chamber with the humidity of less than or equal to 30% at 50 ℃;
step three: preparation of white background slurry: according to the mass ratio, sequentially adding deionized water, propylene glycol, water-based wax with 20% of solid content, preservative, dispersant, flatting agent and defoaming agent into polyurethane emulsion with 50% of solid content, stirring at the rotating speed of 1000r/min for 5min, adding whiting powder and titanium dioxide, stirring at the rotating speed of 1000r/min for 5min, adding thickener, stirring at the rotating speed of 1300r/min for 15min, uniformly mixing, adding curing agent before use, and uniformly stirring to obtain white background slurry;
manufacturing a screen printing plate, printing white background slurry on the image-text layer 3 by using a screen printing machine to form a background layer 4, wherein the image-text layer for offset printing is very thin, the covering power of ink is poor, patterns or characters must be set off by using white or other light-colored background colors with strong covering power, the screen printing machine has the screen mesh of 120 meshes, the temperature of an oven of the screen printing machine is 68 ℃, the printing times are 2 times, and the thickness is 0.050 mm;
step four: preparing hot melt adhesive liquid: adding polyester resin into ethyl acetate according to the mass ratio, soaking for 60min, then stirring for 60min until the polyester resin is completely dissolved to obtain a dissolved solution, sequentially adding the dissolved solution and the elastic polyurethane resin rubber powder into a mixed solvent formed by mixing cyclohexanone and ethyl acetate, and stirring for 60min at the rotating speed of 1000r/min to uniformly mix to obtain a hot melt adhesive solution;
the method comprises the steps of manufacturing a screen printing plate, coating hot melt glue solution on a background layer 4 by a screen printer to form a hot melt glue layer 5 (the hot melt glue layer plays a role of firmly bonding a pattern on a printing stock through heating and pressurizing, peeling off a PET (polyethylene terephthalate) film of a printing carrier 1 after cooling after hot stamping is completed), clearly displaying the pattern on the surface of the printing stock, enabling a polyester screen to be 100 meshes, enabling the temperature of an oven of the screen printer to be 70 ℃, enabling the printing frequency to be 2 times, enabling the thickness to be 0.120mm, and then sending the polyester screen to a constant temperature and humidity chamber to dry for 40min at 70 ℃.
Example 2
As shown in fig. 1, the invention provides an environment-friendly thermal transfer printing film, which sequentially comprises a printing carrier 1 (the quality requirement needs to meet the technical requirement of Q/FJQY 004-.
The background slurry comprises the following components in parts by weight: 5 parts of deionized water with the weight of more than 15 megaohms, 4 parts of propylene glycol, 0.5 part of water-based wax with the solid content of 20 percent, 0.06 part of preservative, 0.6 part of dispersant, 0.06 part of flatting agent, 0.4 part of defoaming agent, 51 parts of polyurethane emulsion with the solid content of 50 percent, 4 parts of whiting, 20 parts of titanium dioxide, 0.5 part of thickening agent and 0.5 part of curing agent.
The hot melt adhesive comprises the following components in parts by weight: 4 parts of polyester resin, 4 parts of ethyl acetate, 42 parts of elastic polyurethane resin powder and 50 parts of mixed solvent; the mixed solvent comprises the following components in parts by weight: 35 parts of cyclohexanone and 15 parts of ethyl acetate.
The method for manufacturing the environment-friendly thermal transfer printing film comprises the following steps:
the method comprises the following steps: printing a polyurethane resin solution with the solid content of 24% on the surface layer of the printing carrier 1 by a screen printer to form a protective layer 2, wherein the terylene screen is 200 meshes, the oven temperature of the screen printer is 65 ℃, and the printing and coating dry weight is 0.8g/m2；
Step two: firstly, preparing a PS printing plate, then printing CMYK printing ink on the protective layer 2 by using an offset color press to form an image-text layer 3, and drying for 12 hours in a constant temperature and humidity chamber with the humidity of less than or equal to 30 percent at the temperature of 45 ℃;
step three: preparation of white background slurry: according to the mass ratio, sequentially adding deionized water, propylene glycol, water-based wax with 20% of solid content, preservative, dispersant, flatting agent and defoaming agent into polyurethane emulsion with 50% of solid content, stirring at the rotating speed of 900r/min for 7min, adding whiting powder and titanium dioxide, stirring at the rotating speed of 900r/min for 7min, adding thickener, stirring at the rotating speed of 1200r/min for 18min, mixing uniformly, adding curing agent before use, and stirring uniformly to obtain background slurry;
manufacturing a screen printing plate, printing white background slurry on the image-text layer 3 by using a screen printing machine to form a background layer 4, wherein the image-text layer for offset printing is very thin, the covering power of ink is poor, patterns or characters must be backed by white or other light-colored background colors with strong covering power, the screen printing machine has the screen mesh of 120 meshes, the temperature of an oven of the screen printing machine is 65 ℃, the printing times are 2 times, and the thickness is 0.050 mm;
step four: preparing hot melt adhesive liquid: adding polyester resin into ethyl acetate according to the mass ratio, soaking for 55min, then stirring for 65min until the polyester resin is completely dissolved to obtain a dissolved solution, sequentially adding the dissolved solution and the elastic polyurethane resin rubber powder into a mixed solvent formed by mixing cyclohexanone and ethyl acetate, and stirring for 65min at the rotating speed of 900r/min to uniformly mix to obtain a hot melt adhesive solution;
the method comprises the steps of manufacturing a screen printing plate, coating hot melt glue solution on a background layer 4 by a screen printer to form a hot melt glue layer 5 (the hot melt glue layer plays a role of firmly bonding a pattern on a printing stock through heating and pressurizing, peeling off a PET (polyethylene terephthalate) film of a printing carrier 1 after cooling after hot stamping is completed), clearly displaying the pattern on the surface of the printing stock, enabling a polyester screen to be 100 meshes, enabling the temperature of an oven of the screen printer to be 65 ℃, enabling the printing frequency to be 2 times, enabling the thickness to be 0.120mm, and then sending the polyester screen to a constant temperature and humidity chamber to dry for 45min at 65 ℃.
Example 3
As shown in fig. 1, the invention provides an environment-friendly thermal transfer printing film, which sequentially comprises a printing carrier 1 (the quality requirement needs to meet the technical requirement of Q/FJQY 004-.
The background slurry comprises the following components in parts by weight: 9 parts of deionized water with the weight of more than 15 megaohms, 8 parts of propylene glycol, 1.5 parts of water-based wax with the solid content of 20 percent, 0.07 part of preservative, 0.5 part of dispersant, 0.07 part of flatting agent, 0.3 part of defoamer, 61 parts of polyurethane emulsion with the solid content of 50 percent, 8 parts of whiting, 26 parts of titanium dioxide, 1.5 parts of thickener and 1.5 parts of curing agent.
The hot melt adhesive comprises the following components in parts by weight: 3 parts of polyester resin, 3 parts of ethyl acetate, 45 parts of elastic polyurethane resin powder and 51 parts of mixed solvent; the mixed solvent comprises the following components in parts by weight: 41 parts of cyclohexanone and 10 parts of ethyl acetate.
The method for manufacturing the environment-friendly thermal transfer printing film comprises the following steps:
the method comprises the following steps: printing a polyurethane resin solution with the solid content of 24% on the surface layer of the printing carrier 1 by a screen printer to form a protective layer 2, wherein the terylene screen is 200 meshes, the oven temperature of the screen printer is 75 ℃, and the printing and coating dry weight is 1.2g/m2；
Step two: firstly, preparing a PS printing plate, then printing CMYK printing ink on the protective layer 2 by using an offset color press to form an image-text layer 3, and drying for 8 hours in a constant temperature and humidity chamber with the humidity of less than or equal to 30% at the temperature of 55 ℃;
step three: preparation of white background slurry: according to the mass ratio, sequentially adding deionized water, propylene glycol, water-based wax with 20% of solid content, preservative, dispersant, flatting agent and defoaming agent into polyurethane emulsion with 50% of solid content, stirring at the rotating speed of 1100r/min for 3min, adding whiting powder and titanium dioxide, stirring at the rotating speed of 1100r/min for 3min, adding thickener, stirring at the rotating speed of 1400r/min for 12min, uniformly mixing, adding curing agent before use, and uniformly stirring to obtain background slurry;
manufacturing a screen printing plate, printing white background slurry on the image-text layer 3 by using a screen printing machine to form a background layer 4, wherein the image-text layer for offset printing is very thin, the covering power of ink is poor, patterns or characters must be backed by white or other light-colored background colors with strong covering power, the screen printing machine has the advantages of 120 meshes of terylene screen, the temperature of an oven of the screen printing machine is 70 ℃, the printing times are 2 times, and the thickness is 0.050 mm;
step four: preparing hot melt adhesive liquid: adding polyester resin into ethyl acetate according to the mass ratio, soaking for 65min, then stirring for 55min until the polyester resin is completely dissolved to obtain a dissolved solution, sequentially adding the dissolved solution and the elastic polyurethane resin rubber powder into a solvent consisting of cyclohexanone and ethyl acetate, and stirring at the rotating speed of 1100r/min for 55min to uniformly mix to obtain a hot melt adhesive solution;
the method comprises the steps of manufacturing a screen printing plate, coating hot melt glue solution on a background layer 4 by a screen printer to form a hot melt glue layer 5 (the hot melt glue layer plays a role of firmly bonding a pattern on a printing stock through heating and pressurizing, peeling off a PET (polyethylene terephthalate) film of a printing carrier 1 after cooling after hot stamping is completed), clearly displaying the pattern on the surface of the printing stock, enabling a polyester screen to be 100 meshes, enabling the temperature of an oven of the screen printer to be 75 ℃, enabling the printing frequency to be 2 times, enabling the thickness to be 0.120mm, and then sending the polyester screen to a constant temperature and humidity chamber to dry for 35min at 75 ℃.
When the environment-friendly thermal transfer printing film is used, the thermal transfer printing equipment heats and presses the film, the part with the pictures and texts can be adhered to the surface of a printing stock, and the PET film on the printing carrier 1 is peeled off after cooling, so that the clear and bright-colored pictures and texts are displayed on the printing stock.
The environmental-friendly thermal transfer printing film prepared in example 1 was subjected to the following tests.
The test method comprises the following steps:
1. hot stamping layer performance, hot stamping layer performance should accord with the regulation of table 2:
TABLE 2 Hot stamping layer Properties
2. Category of basic safety technical requirements for hot stamping layer
The basic safety technical requirement of the hot stamping layer requires that the fine products in the category meet the requirement of the B category in GB 18401.
3. Inspection method
(1) And (3) testing conditions: the laboratory temperature is 23 ℃ plus or minus 5 ℃ and the relative humidity is (60 plus or minus 10)%.
And (3) pretreating the sample, and standing for more than or equal to 8 hours in the environment without ultraviolet light irradiation under the conditions.
The viewing bar conforms to the CY/T3 specification.
(2) Appearance of the product
The samples were visually examined under the light source defined by CY/T3. The smudges were measured with a 20-fold degree magnifier with an accuracy of 0.01 mm.
(3) Deviation of specification and dimension of finished product
The length (to the precision of 0.1mm) of the cut or die-cut product sample having a predetermined dimension is measured, and the difference from the predetermined dimension is used as the deviation of the specification and dimension of the product.
(4) Overprint errors
The sample was placed under a light source defined by CY/T3, and 3 points of the overprint errors between any two colors of the main part or the sub part were measured with a 20-magnification magnifying glass having a precision of 0.01mm, and the maximum value was taken as the overprint error of the main part or the sub part of the sample.
(5) Hot stamping layer performance
Definition of
Sample preparation
Hot stamping of a substrate: adopts 95 percent of cotton 40S, 5 percent of spandex 30D and 170 gram weight of spandex 200g/m2The white cotton stretcher cloth.
Hot stamping conditions are as follows: the pressure of the ironing board is more than or equal to 0.2mPa, the temperature of the ironing board is as follows: hot stamping at 120-180 deg.c for: 10s to 20 s.
Sample size: 250mm by 250 mm.
The samples were visually examined under the light source defined by CY/T3.
② same batch same color difference (Delta E)
Sample preparation: the same samples were prepared for clarity as above.
The instrument comprises the following steps: the method is carried out according to the use method specified in GB/T18722 by using a spectrophotometer conforming to GB/T19437.
And (3) a checking step: one of the samples is selected as a reference sample, values L, a and b of CIELAB uniform color space of the sample are measured by a spectrophotometer, and then color differences of the other samples and the reference sample at the same color and the same position are measured respectively.
And (4) testing results: and comparing the color difference of each sample in the same batch, and taking the maximum value as the color difference of the sample in the same batch.
(iii) wear resistance
Sample preparation: the same samples were prepared for clarity as above.
The abrasion resistance was tested according to the regulations of GB/T7705-2008, 6.8.
Water washing resistance
Sample preparation: the same samples were prepared for clarity as above.
The test method comprises the following steps: the method is carried out according to the method specified in GB/T8629. The sample size was not less than 200mm × 200 mm.
The washing program was numbered 5M and the drying program was program a.
The samples were visually examined under the light source defined by CY/T3.
Fading rate: the color density is measured according to the specification of GB/T7705-2008 6.5.3 before water washing, and the color fading rate is calculated after water washing.
The rate of color fading (color density before washing-color density after washing)/color density before washing × 100%
Class of basic safety technical requirement of thermoprinting layer
Sample preparation: the same samples were prepared for clarity as above.
The test method comprises the following steps: according to the GB 18401.
Second, test data
The test results are shown in table 3 below:
TABLE 3 Performance test results of the environmentally friendly thermal transfer printing film obtained in example 1 of the present invention
Third, environmental protection safety performance
1. The safety technical requirements meet the requirements of class B safety technical categories in GB 18401-: water stain fastness, decomposable aromatic amine dye, peculiar smell, formaldehyde content, pH value, friction color fastness and perspiration stain color fastness, and specific detection results are shown in the following table 4.
TABLE 4 test results
2. 197 high concern Substances (SVHC) were subjected to screening tests according to the European Union's REACH regulation, with the test conclusion that: depending on the particular range and screening test, the SVHC test results in the submitted samples were 0.1% (w/w) or less, passing the test.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of protection is not limited thereto. The equivalents and modifications of the present invention which may occur to those skilled in the art are within the scope of the present invention as defined by the appended claims.
Claims (7)
1. The manufacturing method of the environment-friendly heat transfer printing film is characterized by comprising the following steps:
the method comprises the following steps: screen printing a polyurethane resin solution on the surface layer of the printing carrier (1) to form a protective layer (2), wherein the dry weight of the printing coating is 0.8-1.2g/m2；
Step two: firstly, preparing a PS printing plate, then printing ink on the protective layer (2) to form an image-text layer (3), and drying;
step three: preparing background slurry, preparing a screen printing plate, and screen-printing the background slurry on the image-text layer (3) to form a background layer (4); the background slurry comprises the following components in parts by weight: 5-9 parts of deionized water, 4-8 parts of propylene glycol, 0.5-1.5 parts of water-based wax with 20% of solid content, 0.05-0.08 part of preservative, 0.4-0.7 part of dispersant, 0.05-0.08 part of flatting agent, 0.2-0.5 part of defoaming agent, 51-61 parts of polyurethane emulsion with 50% of solid content, 4-8 parts of white powder, 20-26 parts of titanium dioxide, 0.5-1.5 parts of thickening agent and 0.5-1.5 parts of curing agent;
step four: preparing hot melt glue solution, preparing a screen printing plate, screen printing and coating the hot melt glue solution on the background layer (4) to form a hot melt glue layer (5), and drying to obtain the environment-friendly thermal transfer printing film; the hot melt adhesive comprises the following components in parts by weight: 2-4 parts of polyester resin, 2-4 parts of ethyl acetate, 42-48 parts of elastic polyurethane resin powder and 45-57 parts of mixed solvent, wherein the mixed solvent comprises the following components in parts by mass: 35-41 parts of cyclohexanone and 10-16 parts of ethyl acetate.
2. The method for manufacturing the environment-friendly heat transfer printing film according to claim 1, wherein the quality requirement of the printing carrier (1) is required to meet the technical requirement of Q/FJQY 004-2019, and the solid content of the polyurethane resin solution is 24%.
3. The method for manufacturing an environment-friendly thermal transfer printing film according to claim 1, wherein the deionized water is more than 15 megohms.
4. The method for manufacturing the environment-friendly heat transfer printing film according to claim 1, wherein the silk screen in the first step is a 200-mesh polyester silk screen, and the oven temperature of a silk screen printer is 65-75 ℃ during silk screen printing;
the drying in the second step is specifically as follows: drying in a constant temperature and humidity chamber with humidity less than or equal to 30% at 45-55 deg.C for 8-12 h.
5. The method for manufacturing the environment-friendly heat transfer printing film according to claim 1, wherein the silk screen in the third step is a 120-mesh polyester silk screen, and the silk screen printer oven temperature is 65-75 ℃ during silk screen printing, the printing times are 2 times, and the thickness is 0.04-0.07 mm;
the silk screen in the fourth step is a 100-mesh terylene silk screen, and the temperature of a drying oven of a silk screen printer is 65-75 ℃ during silk screen printing, the printing times are 2 times, and the thickness is 0.10-0.14 mm; the drying in the fourth step is specifically as follows: drying at 65-75 deg.C in constant temperature and humidity chamber with humidity less than or equal to 30% for 35-45 min.
6. The method for manufacturing the environment-friendly heat transfer printing film according to claim 1, wherein the preparing of the background slurry in the third step is specifically as follows: according to the mass ratio, firstly, 5 to 9 parts of deionized water, 4 to 8 parts of propylene glycol, 0.5 to 1.5 parts of aqueous wax with 20 percent of solid content, 0.05 to 0.08 part of preservative, 0.4 to 0.7 part of dispersant, 0.05 to 0.08 part of flatting agent and 0.2 to 0.5 part of defoaming agent are sequentially added into 51 to 61 parts of polyurethane emulsion with 50 percent of solid content, stirring at the rotating speed of 900 plus power of 1100r/min for 3-7min, adding 4-8 parts of whiting and 20-26 parts of titanium dioxide, stirring at the rotation speed of 900 plus materials at 1100r/min for 3-7min, then adding 0.5-1.5 parts of thickening agent, stirring at the rotation speed of 1200 plus materials at 1400r/min for 12-18min, mixing uniformly, adding 0.5-1.5 parts of curing agent before use, and stirring uniformly to obtain the product.
7. The method for manufacturing the environment-friendly heat transfer printing film according to claim 1, wherein the step four of preparing the hot melt adhesive solution specifically comprises the following steps: adding 2-4 parts of polyester resin into 2-4 parts of ethyl acetate according to the mass ratio, soaking for 55-65min, then stirring for 55-65min until the polyester resin is completely dissolved to obtain a dissolved solution, sequentially adding the dissolved solution and 42-48 parts of elastic polyurethane resin rubber powder into a mixed solvent, stirring at the rotating speed of 900-1100r/min for 55-65min, and uniformly mixing to obtain the mixed solvent, wherein the mixed solvent is prepared by mixing 35-41 parts of cyclohexanone and 10-16 parts of ethyl acetate.
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| CN113263847A (en) * | 2021-05-17 | 2021-08-17 | 安徽金彩防伪技术有限公司 | Heat transfer gold stamping stained paper and heat transfer anti-counterfeiting printing process |
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| JP2007176011A (en) * | 2005-12-28 | 2007-07-12 | Dainippon Printing Co Ltd | Protective layer heat transfer sheet |
| US8101257B2 (en) * | 2008-12-22 | 2012-01-24 | Sipix Chemical Inc. | Abrasion-resistant transfer printing structure |
| CN202053708U (en) * | 2010-11-12 | 2011-11-30 | 蓝天电脑股份有限公司 | Plate-free transfer film |
| CN102079956B (en) * | 2010-12-18 | 2012-06-27 | 广东生益科技股份有限公司 | White covering film and manufacturing method thereof |
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