CN110696504A - TTR (thermal transfer ribbon) biaxially oriented polyester base film for color printing and preparation method thereof - Google Patents

TTR (thermal transfer ribbon) biaxially oriented polyester base film for color printing and preparation method thereof Download PDF

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Publication number
CN110696504A
CN110696504A CN201910954381.XA CN201910954381A CN110696504A CN 110696504 A CN110696504 A CN 110696504A CN 201910954381 A CN201910954381 A CN 201910954381A CN 110696504 A CN110696504 A CN 110696504A
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China
Prior art keywords
ttr
color printing
surface layer
biaxially oriented
film
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CN201910954381.XA
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Chinese (zh)
Inventor
胡爱华
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Anhui Guofeng Plastic Industry Co Ltd
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Anhui Guofeng Plastic Industry Co Ltd
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Priority to CN201910954381.XA priority Critical patent/CN110696504A/en
Publication of CN110696504A publication Critical patent/CN110696504A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J31/00—Ink ribbons; Renovating or testing ink ribbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters

Abstract

The invention discloses a TTR (thermal transfer ribbon) biaxially oriented polyester base film for color printing, which consists of an upper surface layer, a core layer and a lower surface layer, wherein the core layer is a PET (polyethylene terephthalate) polyester slice; the raw materials of the upper surface layer and the lower surface layer consist of 40-80 parts of PET polyester master batch and 20-60 parts of PET polyester chips in parts by weight; the PET polyester master batch is PET polyester chips containing 0.45-0.55 wt% of silicon dioxide. The invention also discloses a preparation method of the TTR biaxially oriented polyester base film for color printing. The invention has clear printing pattern, high color reduction degree and excellent landscape and figure image effect, and fully meets the current color printing requirement.

Description

TTR (thermal transfer ribbon) biaxially oriented polyester base film for color printing and preparation method thereof
Technical Field
The invention relates to the technical field of polyester base films, in particular to a TTR (transparent temperature-dependent) biaxially oriented polyester base film for color printing and a preparation method thereof.
Background
The film used for TTR printing is a special carbon tape that prints bar codes and text information on labels. With the further pursuit of the market for the printing effect, the demand of printing the color pattern on the label is more and more, and the common TTR carbon ribbon can only print simple bar codes and character information on the label, and cannot meet the demand for color. The TTR film for color printing is based on the principle that three primary colors of 'red, yellow and blue' are coated on a special TTR base film, and the effect of color printing of landscape and portrait patterns is achieved through special printing equipment. In order to ensure that the color pattern is real and fine and put high requirements on the surface structure and cleanliness of the TTR base film, the common TTR biaxially-oriented polyester base filmThe surface roughness Ra is 0.09-0.12 μm, the film surface has no obvious defect and foreign matter, the color printing TTR base film requires the surface roughness Ra less than 0.08 μm, and the film surface cleanliness requires the defect and foreign matter less than or equal to 10/m2Ordinary TTR films are difficult to meet requirements.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a TTR (transparent transfer ribbon) biaxially oriented polyester base film for color printing and a preparation method thereof.
The invention provides a TTR (thermal transfer ribbon) biaxially oriented polyester base film for color printing, which consists of an upper surface layer, a core layer and a lower surface layer, wherein the core layer is a PET (polyethylene terephthalate) polyester slice; the raw materials of the upper surface layer and the lower surface layer consist of 40-80 parts of PET polyester master batch and 20-60 parts of PET polyester chips in parts by weight; the PET polyester master batch is PET polyester chips containing 0.45-0.55 wt% of silicon dioxide.
Preferably, the particle size of the silica is 0.8-1.5 μm.
Preferably, the particle size of the silica is 1.2 μm.
Preferably, in the PET polyester chip, the iron is less than or equal to 2mg/kg, the powder is less than or equal to 100mg/kg, and more than 10u of agglutinated particles are less than or equal to 0.8 per mg.
Preferably, in the PET polyester master batch, the iron is less than or equal to 2mg/kg, the powder is less than or equal to 100mg/kg, and more than 10u of agglutinated particles are less than or equal to 0.8 per mg.
Preferably, the thickness of the TTR biaxially oriented polyester base film for color printing is 4.4 to 4.6 μm.
The invention also provides a preparation method of the TTR biaxially oriented polyester base film for color printing, which comprises the following steps:
s1, drying the core layer by using PET (polyethylene terephthalate) chips, heating for melting, and filtering to obtain a core layer melt;
s2, uniformly mixing the raw materials of the upper surface layer and the lower surface layer according to the parts by weight, heating for melting, vacuumizing, and filtering to respectively obtain an upper surface layer melt and a lower surface layer melt; converging and extruding the core layer melt, the upper surface layer melt and the lower surface layer melt in a three-layer die head to prepare a mixed melt; the mixed melt is subjected to cold roll and electrostatic attachment to obtain a cast sheet;
and S3, longitudinally stretching the cast sheet to obtain a thick sheet, transversely stretching, performing heat setting to obtain a film, and performing traction rolling to remove floating dust and impurities on the surface of the film in a traction rolling link to obtain the TTR biaxially oriented polyester base film for color printing.
Preferably, in S3, the preheating temperature for longitudinal stretching is 45-98 ℃, the stretching temperature is 101-103 ℃, and the stretching ratio is 4.3-4.5 times.
Preferably, in S3, the preheating temperature for transverse stretching is 90 to 98 ℃, the stretching temperature is 99 to 105 ℃, and the stretching ratio is 3.8 to 4.1 times.
Preferably, in S3, the heat-setting temperature is 232-238 ℃.
Preferably, in S1, S2, the filtration pore size is 5-10 μm.
Preferably, in S3, platinum is added as a catalyst during heat setting.
Preferably, in S1, the drying temperature is 140-160 ℃, and the drying time is 8-10 h.
Preferably, in S2, the extrusion temperature is 275-285 ℃.
Preferably, in S3, in the pulling and rolling step, after removing floating dust and impurities on the surface of the film, cooling to room temperature, flattening, performing thickness measurement and rolling, then performing aging treatment for 8 hours at 22-28 ℃ in an environment with humidity of 50-60%, and slitting to obtain the TTR biaxially oriented polyester base film for color printing.
The invention optimizes and improves the film formula and the production process, the PET polyester master batch is PET polyester slices containing a proper amount of silicon dioxide, and the particle size of the silicon dioxide is smaller; the PET polyester chip and the PET polyester master batch have the characteristics of cleanness and less impurities, so that the cleanliness of the polyester base film can be improved, and the surface structure of the polyester base film can be improved; in the production process, the aperture of melt filtration is 5-10 μm, impurities in the melt are filtered, and dust removal equipment is used in a traction winding link to remove floating dust and impurities on the surface of the film, so that the cleanliness of the polyester base film is further improved; and the prepared TTR biaxially oriented polyester film for color printing has the advantages of excellent physical and mechanical properties, low surface roughness, clean film surface and good ink adhesion by matching with proper processes such as extrusion, stretching, heat setting and the like, and the prepared color TTR printing carbon ribbon has clear and vivid printed patterns and fully meets the current color printing requirements.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
A TTR biaxial stretching polyester basal membrane for color printing is composed of an upper surface layer, a core layer and a lower surface layer, wherein the core layer is a PET polyester slice; the raw materials of the upper surface layer and the lower surface layer consist of 40 parts of PET polyester master batch and 60 parts of PET polyester chips in parts by weight; the PET polyester master batch is PET polyester chips containing 0.45 wt% of silicon dioxide; the particle size of the silicon dioxide is 0.8-1.5 μm, and the central value is 1.2 μm; in the PET polyester chip, the iron is less than or equal to 2mg/kg, the powder is less than or equal to 100mg/kg, and more than 10u of agglutinated particles are less than or equal to 0.8 per mg; in the PET polyester master batch, the iron content is less than or equal to 2mg/kg, the powder content is less than or equal to 100mg/kg, and more than 10u of agglutinated particles are less than or equal to 0.8 per mg.
The preparation method of the TTR biaxially oriented polyester base film for color printing comprises the following steps:
s1, carrying out fluidized bed drying on the core layer by using PET (polyethylene terephthalate) chips at 140 ℃ for 6 hours, adding the PET chips into a main extruder, heating and melting the PET chips, and filtering the PET chips by using a 5-micron disc type filter to obtain a core layer melt, wherein the water content of the core layer melt is less than or equal to 30 ppm;
s2, uniformly mixing the raw materials of the upper surface layer and the lower surface layer according to the parts by weight, adding the raw materials into an auxiliary extruder, heating and melting, vacuumizing, filtering by a 10-micron disc filter, and then respectively obtaining an upper surface layer melt and a lower surface layer melt by a die head connector; converging the core layer melt, the upper surface layer melt and the lower surface layer melt in a three-layer die head, and extruding at 275 ℃ to prepare a mixed melt; the mixed melt is subjected to cold roll and electrostatic attachment to obtain a cast sheet;
s3, gradually heating the cast sheet from 45 ℃ to 98 ℃ through a plurality of rollers (each roller is set to be at different temperature), preheating, then gradually heating from 101 ℃ to 103 ℃, longitudinally stretching by 4.4 times in the process to obtain a thick sheet, and cooling to room temperature; heating from 90 ℃ to 98 ℃ gradually in a transverse stretcher, heating from 99 ℃ to 105 ℃ gradually by multistage windboxes (the temperature of each stage of windboxes is different), transversely stretching by 3.9 times in the process, then carrying out heat setting at 234 ℃ to obtain a film, simultaneously adding platinum catalyst in the front part of a wind changing box in a heat setting area, catalytically decomposing oligomer in the film into water and carbon dioxide, removing floating dust and impurities on the surface of the film by a dust removing device at a traction part, naturally cooling to room temperature, flattening in a traction system, feeding a traction thickness gauge for detection and feedback to a die head, automatically adjusting the extrusion thickness, carrying out thickness measurement and rolling, carrying out aging treatment for 8 hours in an environment with the temperature of 22-28 ℃ and the humidity of 50-60%, and cutting to obtain the TTR biaxially oriented polyester base film for color printing, wherein the thickness is 4.4 mu m.
Example 2
A TTR biaxial stretching polyester basal membrane for color printing is composed of an upper surface layer, a core layer and a lower surface layer, wherein the core layer is a PET polyester slice; the raw materials of the upper surface layer and the lower surface layer consist of 60 parts of PET master batch and 40 parts of PET chips in parts by weight; the PET polyester master batch is PET polyester chips containing 0.55 wt% of silicon dioxide; the particle size of the silicon dioxide is 0.8-1.5 μm, and the central value is 1.2 μm; in the PET polyester chip, the iron is less than or equal to 2mg/kg, the powder is less than or equal to 100mg/kg, and more than 10u of agglutinated particles are less than or equal to 0.8 per mg; in the PET polyester master batch, the iron content is less than or equal to 2mg/kg, the powder content is less than or equal to 100mg/kg, and more than 10u of agglutinated particles are less than or equal to 0.8 per mg.
The preparation method of the TTR biaxially oriented polyester base film for color printing comprises the following steps:
s1, carrying out fluidized bed drying on the core layer by using PET (polyethylene terephthalate) chips at 150 ℃ for 9h, adding the PET chips into a main extruder, heating and melting the PET chips, and filtering the PET chips by using a 10-micron disc filter to obtain a core layer melt, wherein the water content of the core layer melt is less than or equal to 20 ppm;
s2, uniformly mixing the raw materials of the upper surface layer and the lower surface layer according to the parts by weight, adding the raw materials into an auxiliary extruder, heating and melting, vacuumizing, filtering by a 10-micron disc filter, and then respectively obtaining an upper surface layer melt and a lower surface layer melt by a die head connector; converging the core layer melt, the upper surface layer melt and the lower surface layer melt in a three-layer die head, and extruding at 280 ℃ to prepare a mixed melt; the mixed melt is subjected to cold roll and electrostatic attachment to obtain a cast sheet;
s3, gradually heating the cast sheet from 45 ℃ to 98 ℃ through a plurality of rollers (each roller is set to be at different temperature), preheating, then gradually heating from 101 ℃ to 103 ℃, longitudinally stretching by 4.3 times in the process to obtain a thick sheet, and cooling to room temperature; heating from 90 ℃ to 98 ℃ gradually in a transverse stretcher, heating from 99 ℃ to 105 ℃ gradually by multistage windboxes (the temperature of each stage of windboxes is different), transversely stretching by 3.9 times in the process, then carrying out heat setting at 236 ℃ to obtain a film, simultaneously adding platinum catalyst at the front part of a wind changing box in a heat setting area, catalytically decomposing oligomer in the film into water and carbon dioxide, removing floating dust and impurities on the surface of the film by a dust removing device at a traction part, naturally cooling to room temperature, flattening in a traction system, feeding a traction thickness gauge for detection and feedback to a die head, automatically adjusting the extrusion thickness, carrying out thickness measurement and rolling, carrying out aging treatment for 8 hours in an environment with the temperature of 22-28 ℃ and the humidity of 50-60%, and cutting to obtain the TTR biaxially oriented polyester base film for color printing, wherein the thickness is 4.5 mu m.
Example 3
A TTR biaxial stretching polyester basal membrane for color printing is composed of an upper surface layer, a core layer and a lower surface layer, wherein the core layer is a PET polyester slice; the raw materials of the upper surface layer and the lower surface layer consist of 80 parts of PET master batch and 20 parts of PET chips in parts by weight; the PET polyester master batch is PET polyester chips containing 0.5 wt% of silicon dioxide; the particle size of the silicon dioxide is 0.8-1.5 μm, and the central value is 1.2 μm; in the PET polyester chip, the iron is less than or equal to 2mg/kg, the powder is less than or equal to 100mg/kg, and more than 10u of agglutinated particles are less than or equal to 0.8 per mg; in the PET polyester master batch, the iron content is less than or equal to 2mg/kg, the powder content is less than or equal to 100mg/kg, and more than 10u of agglutinated particles are less than or equal to 0.8 per mg.
The preparation method of the TTR biaxially oriented polyester base film for color printing comprises the following steps:
s1, carrying out fluidized bed drying on the core layer by using PET (polyethylene terephthalate) chips at 140 ℃ for 6 hours, adding the PET chips into a main extruder, heating and melting the PET chips, and filtering the PET chips by using a 10-micron disc type filter to obtain a core layer melt, wherein the water content of the core layer melt is less than or equal to 10 ppm;
s2, uniformly mixing the raw materials of the upper surface layer and the lower surface layer according to the parts by weight, adding the raw materials into an auxiliary extruder, heating and melting, vacuumizing, filtering by a 10-micron disc filter, and then respectively obtaining an upper surface layer melt and a lower surface layer melt by a die head connector; merging the core layer melt, the upper surface layer melt and the lower surface layer melt in a three-layer die head, and extruding at 283 ℃ to prepare a mixed melt; the mixed melt is subjected to cold roll and electrostatic attachment to obtain a cast sheet;
s3, gradually heating the cast sheet from 45 ℃ to 98 ℃ through a plurality of rollers (each roller is set to be at different temperature), preheating, then gradually heating from 101 ℃ to 103 ℃, longitudinally stretching by 4.4 times in the process to obtain a thick sheet, and cooling to room temperature; heating from 90 ℃ to 98 ℃ gradually in a transverse stretcher, heating from 99 ℃ to 105 ℃ gradually by multistage windboxes (the temperature of each stage of windboxes is different), transversely stretching by 4.0 times in the process, then carrying out heat setting at 236 ℃ to obtain a film, simultaneously adding platinum catalyst at the front part of a wind changing box in a heat setting area, catalytically decomposing oligomer in the film into water and carbon dioxide, removing floating dust and impurities on the surface of the film by a dust removing device at a traction part, naturally cooling to room temperature, flattening in a traction system, feeding a traction thickness gauge for detection and feedback to a die head, automatically adjusting the extrusion thickness, carrying out thickness measurement and rolling, carrying out aging treatment for 8 hours in an environment with the temperature of 22-28 ℃ and the humidity of 50-60%, and cutting to obtain the TTR biaxially oriented polyester base film for color printing, wherein the thickness is 4.4 mu m.
Experimental example 1
Comparing the TTR biaxially oriented polyester base film for color printing prepared in examples 1 to 3 with an existing common polyester base film for TTR printing (common TTR base film), respectively detecting the surface roughness and the number of surface defects, and making a TTR thermal transfer ribbon for detection, wherein the surface roughness is detected according to the specification of GB/T13542.2-2009, and the specific detection results are shown in the following table:
sample (I) Roughness of surface layer (μm) Number of defects (number/m)2) Printing effect
Example 1 0.068 7.2 Clear portrait
Example 2 0.073 8.3 Clear portrait
Example 3 0.078 8.9 Image clarity
Common TTR base film 0.010 17.8 Cannot print a portrait
As can be seen from the above table, the surface roughness and the film surface cleaning performance of the embodiments 1 to 3 of the present invention are both significantly better than those of the conventional common TTR base film, and especially, the embodiment 1 can fully satisfy the customer requirements with higher requirements.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (10)

1. A TTR biaxial stretching polyester basal lamina used for color printing is composed of an upper surface layer, a core layer and a lower surface layer, and is characterized in that the core layer is a PET polyester slice; the raw materials of the upper surface layer and the lower surface layer consist of 40-80 parts of PET polyester master batch and 20-60 parts of PET polyester chips in parts by weight; the PET polyester master batch is PET polyester chips containing 0.45-0.55 wt% of silicon dioxide.
2. TTR biaxially oriented polyester based film for color printing according to claim 1, wherein the particle size of silica is 0.8-1.5 μm; preferably, in the PET polyester chip, the iron is less than or equal to 2mg/kg, the powder is less than or equal to 100mg/kg, and more than 10u of agglutinated particles are less than or equal to 0.8 per mg; preferably, in the PET polyester master batch, the iron is less than or equal to 2mg/kg, the powder is less than or equal to 100mg/kg, and more than 10u of agglutinated particles are less than or equal to 0.8 per mg; preferably, the thickness of the TTR biaxially oriented polyester base film for color printing is 4.4 to 4.6 μm.
3. A method for preparing TTR biaxially oriented polyester film for color printing according to claim 1 or 2, comprising the steps of:
s1, drying the core layer by using PET (polyethylene terephthalate) chips, heating for melting, and filtering to obtain a core layer melt;
s2, uniformly mixing the raw materials of the upper surface layer and the lower surface layer according to the parts by weight, heating for melting, vacuumizing, and filtering to respectively obtain an upper surface layer melt and a lower surface layer melt; converging and extruding the core layer melt, the upper surface layer melt and the lower surface layer melt in a three-layer die head to prepare a mixed melt; the mixed melt is subjected to cold roll and electrostatic attachment to obtain a cast sheet;
and S3, longitudinally stretching the cast sheet to obtain a thick sheet, transversely stretching, performing heat setting to obtain a film, and performing traction rolling to remove floating dust and impurities on the surface of the film in a traction rolling link to obtain the TTR biaxially oriented polyester base film for color printing.
4. The method of claim 3, wherein the preheating temperature for longitudinal stretching is 45-98 ℃, the stretching temperature is 101-103 ℃, and the stretching ratio is 4.3-4.5 times in S3.
5. The method of claim 3 or 4 for preparing TTR biaxially oriented polyester film for color printing, wherein in S3, the preheating temperature for transverse stretching is 90-98 ℃, the stretching temperature is 99-105 ℃, and the stretching ratio is 3.8-4.1.
6. The method for preparing TTR biaxially oriented polyester film for color printing as claimed in any of claims 3-5, wherein the heat setting temperature is 232-238 ℃ in S3.
7. A method of preparing TTR biaxially oriented polyester based film according to any of claims 3 to 6 wherein in S1, S2 the filtration pore size is 5 to 10 μm.
8. The method of any one of claims 3-7 for making TTR biaxially oriented polyester film for color printing, wherein in S3, platinum is added as a catalyst during heat setting.
9. The method for preparing TTR biaxially oriented polyester film for color printing as claimed in any one of claims 3 to 8, wherein the drying temperature is 140 ℃ and 160 ℃ and the drying time is 8 to 10 hours in S1.
10. The method for preparing TTR biaxially oriented polyester base film for color printing as claimed in any one of claims 3 to 9, wherein the extrusion temperature is 275-285 ℃ in S2; preferably, in S3, in the pulling and rolling step, after removing floating dust and impurities on the surface of the film, cooling to room temperature, flattening, performing thickness measurement and rolling, then performing aging treatment for 8 hours at 22-28 ℃ in an environment with humidity of 50-60%, and slitting to obtain the TTR biaxially oriented polyester base film for color printing.
CN201910954381.XA 2019-10-09 2019-10-09 TTR (thermal transfer ribbon) biaxially oriented polyester base film for color printing and preparation method thereof Pending CN110696504A (en)

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* Cited by examiner, † Cited by third party
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KR20060014085A (en) * 2004-08-10 2006-02-15 김대웅 An ink composition for a thermal transfer ribbon(ttr) and the ttr manufactured from it
CN102390194A (en) * 2011-08-21 2012-03-28 安徽国风塑业股份有限公司 Ultrathin TTR (Thermal Transfer Ribbon) polyester film and preparation method thereof
CN103223758A (en) * 2013-04-17 2013-07-31 安徽国风塑业股份有限公司 BOPET film for building engineering and its making method
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Application publication date: 20200117