CN113103786A - Pre-compounded aluminum foil surface gravure printing method - Google Patents
Pre-compounded aluminum foil surface gravure printing method Download PDFInfo
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- CN113103786A CN113103786A CN202110404295.9A CN202110404295A CN113103786A CN 113103786 A CN113103786 A CN 113103786A CN 202110404295 A CN202110404295 A CN 202110404295A CN 113103786 A CN113103786 A CN 113103786A
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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
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
- B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/74—Joining plastics material to non-plastics material
- B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
- B29C66/7422—Aluminium or alloys of aluminium
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- 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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal 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
- B32B15/085—Layered products comprising a layer of metal comprising metal 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 comprising polyolefins
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- 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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
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- 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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
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- 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
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/14—Printing or colouring
- B32B38/145—Printing
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- 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
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/18—Handling of layers or the laminate
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- 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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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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
- B41M1/14—Multicolour printing
Abstract
The invention discloses a pre-compounded aluminum foil surface intaglio printing method, which comprises gluing treatment, compounding treatment, first curing treatment, intaglio printing treatment, second curing treatment, cooling treatment, slitting treatment and final inspection treatment.
Description
Technical Field
The invention relates to the technical field of aluminum foil printing in the printing and packaging industry, in particular to a pre-compounded aluminum foil surface gravure printing method.
Background
Aluminum foil composite films, which are the most commonly used composite roll films, typically contain pure Aluminum (AL) and aluminum plated (VMPET),
currently, aluminum foil composite films are widely used in various packaging film products, including food packaging bags, low-temperature vacuum freezing bags, composite roll films, aluminum foil bags, and the like.
Generally, the manufacturing process of the aluminum foil composite film is manufactured by aluminum foil printing, in the existing aluminum foil printing, an aluminum foil is directly used as a base material, then printing is carried out on the surface of the aluminum foil, and the printed aluminum foil semi-finished product is then compounded with other base materials for production, so that the aluminum foil printing has some defects:
(1) the single-layer metal aluminum foil has lower mechanical processing strength;
(2) if the single-layer aluminum foil is directly printed by adopting the gravure, wrinkling or material breakage is easily caused.
Thus, the prior art is not satisfactory.
Disclosure of Invention
The invention aims to solve the technical problems that in the prior art, only a single layer is low in processing efficiency and easy to wrinkle or break in the process of printing aluminum foil, and the like, and provides a printing method capable of enhancing the printing of the aluminum foil and preventing the surface of the aluminum foil from wrinkling or breaking in the printing process.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a pre-compounded aluminum foil surface gravure printing method, which is implemented on the basis of equipment of a printing machine and comprises the following steps:
step 1) gluing treatment: sizing LLDPE with the thickness of 20 mu m, wherein the glue used for sizing is adhesive, and the type and the mixture ratio of the adhesive are SY-03G: SY-03B: ethyl ester 20:4.8: 28;
step 2) composite treatment: attaching the glued LLDPE and an AL aluminum foil with the thickness of 20 mu m to form a 0.02mm AL aluminum foil/0.02 mm LLDPE semi-finished product composite film;
step 3) first curing treatment: feeding the 0.02mm Al aluminum foil/0.02 mm LLDPE semi-finished product composite film prepared by compounding in the step 2 onto a material rack of a curing chamber for hanging curing;
step 4), gravure printing treatment: and feeding the 0.02mm Al aluminum foil/0.02 mm LLDPE semi-finished composite film subjected to first curing to one end of a feeding shaft of a printing machine, sequentially feeding the semi-finished composite films to each color unit through the traction force of the printing machine, and transferring the ink on the gravure printing machine to the surface of the AL aluminum foil to form the 0.02mm Al aluminum foil/0.02 mm LLDPE composite film under the action of the pressure of a rubber wheel of the printing machine.
Preferably, the printing method of the present invention further comprises:
step 5) second curing treatment: feeding the 0.02mm Al aluminum foil/0.02 mm LLDPE composite film prepared after printing in the step 4 onto a material rack of a curing chamber for hanging, sequentially carrying out curing on the 0.02mm Al aluminum foil/0.02 mm LLDPE composite film by an oven with the temperature of 45-68 ℃ in the curing chamber, and finally winding the composite film on a paper tube to finish printing curing of the composite film;
step 6) cooling treatment: and (5) cooling the cured composite film in the step (5) by a cooling roller of a printing machine.
Preferably, the printing method of the present invention further comprises:
step 7), slitting treatment: cutting the composite film cooled in the step 6 into a composite packaging film with a required specification through a cutting machine table of a three-summer machine, wherein the required cutting specification of the composite packaging film is 45mm thick x 500m long;
step 8) final inspection treatment: and sampling and detecting the cut composite packaging film to detect various performances of the composite packaging film.
Preferably, the LLDPE is sized by a glue spreader of a printing machine in the step 1, the sizing mesh of the glue spreader is 110 x 75, and the sizing amount of the glue spreader is 3-3.2 g/square meter.
Preferably, the compounding in the step 2 is carried out by a compounding machine with a model number of fuji FL-2, the compounding mode is dry compounding, the compounding speed of the compounding machine is 80M/min, and the material of the semi-finished composite film after the compounding treatment is 660 x 0.02mmAL aluminum foil/660 x 0.02 mmLLDPE.
Preferably, the 0.02mm Al aluminum foil/0.02 mm LLDPE semi-finished composite film in the step 3 is hung on a curing chamber for 30 hours, the curing temperature is 45 ℃, and the adhesive used before compounding in the step 2 is subjected to crosslinking reaction at 45 ℃ through curing and is cured so as to enhance the compounding fastness of the semi-finished composite film.
Preferably, when the cured 0.02mm AL/0.02mm lldpe semi-finished composite film in the step 4 is placed at one end of a discharging shaft of a printing machine, a printing rubber roller device of the printing machine performs one-pass gravure printing by using water bottom coating, the printing rubber roller device performs two-pass gravure printing by using red ink and yellow ink, the printing rubber roller device performs three-pass gravure printing by using thinner ink, and the printing rubber roller device performs four-pass gravure printing by using the ink so as to transfer the ink to the surface of the AL aluminum foil.
Preferably, the model of the machine of the printing machine in the step 4 is Fuji FCD-14, the printing mode adopted by the printing machine is gravure printing, the printing speed of the printing machine is 70M/min, the traction force required by the printing machine to send the semi-finished composite film to each color unit is 150 and 160N, and the pressure of the rubber wheel of the printing machine is 0.35 MPa.
Preferably, in the step 5, the temperature of the composite film in the curing process is 45 ℃, the curing time is 12-13 hours, the composite film is subjected to solvent volatilization and ink drying at the temperature of 45 ℃, and the tension required for rolling the composite film on a paper tube is 80-90N.
Preferably, after the composite film is cured in the step 6, the composite film needs to be cooled at normal temperature, the normal temperature is 20-25 ℃, the cooling time is 24 hours, and the composite film releases internal stress generated in gluing and inking reactions through normal temperature cooling so as to slow down the precipitation of the LLDPE slipping agent on the inner layer, thereby reducing the friction coefficient of the composite film, enabling various properties of the composite film to tend to be stable, and being beneficial to the output of dimensional stability when the composite film is cut.
Compared with the prior art, the scheme of the invention at least comprises the following beneficial effects:
(1) the printing method of the invention includes rubberizing treatment, composite treatment, first curing treatment, gravure printing treatment, the invention is through rubberizing LLDPE of the thickness of 20 microns, only glue LLDPE after rubberizing and Al foil thickness come into contact with form 0.02mmAL aluminium foil/0.02 mmLLDPE half-finished product complex film, secondly send half-finished product complex film into curing chamber to hang and cure, then transfer the printing ink on the gravure press to AL aluminium foil under the rubber wheel pressure of the printing machine, glue LLDPE before printing of aluminium foil, then compound LLDPE after rubberizing and AL aluminium foil and come into contact with, then carry on curing and gravure printing process, LLDPE and AL aluminium foil compounds and increases the intensity of AL aluminium foil membrane in the course of machining, in this way, operating AL aluminium foil gravure to adopt direct printing will not appear wrinkling or material break either, better facilitate the going on of the printing process of the aluminium foil, The printing method is simple, and can be widely applied to large-scale production.
(2) The semi-finished composite film is hung and cured on a curing chamber, and the adhesive used before curing the Al aluminum foil and LLDPE composite can fully generate crosslinking reaction at the curing temperature of 45 ℃ and cure the semi-finished composite film, so that the compounding fastness of the semi-finished composite film is enhanced.
(3) The semi-finished composite film is subjected to ink gravure printing to form a composite film, the composite film needs to be cured for the second time, and the composite film can be subjected to solvent volatilization and ink drying at the curing temperature of 45 ℃.
(4) The composite film needs to be cooled at normal temperature after being cured, the composite film releases internal stress generated in gluing and inking reactions through normal temperature cooling, and then the precipitation of an LLDPE slipping agent on the inner layer is slowed down, so that the friction coefficient of the composite film is reduced, various performances of the composite film tend to be stable, and the output of the dimensional stability of the composite film during slitting is facilitated.
Drawings
FIG. 1 is a schematic view of the procedure of gravure printing on the surface of the pre-compounded aluminum foil.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a pre-compounded aluminum foil surface gravure printing method which is realized on the basis of equipment such as a printing machine, a curing chamber of an oven and the like.
As shown in fig. 1, the present invention provides a pre-compounded aluminum foil surface gravure printing method, which comprises the following steps:
step 1) gluing treatment: sizing LLDPE with the thickness of 20 mu m, wherein the glue used for sizing is adhesive, and the type and the mixture ratio of the adhesive are SY-03G: SY-03B: ethyl ester 20:4.8: 28;
step 2) composite treatment: attaching the glued LLDPE and an AL aluminum foil with the thickness of 20 mu m to form a 0.02mm AL aluminum foil/0.02 mm LLDPE semi-finished product composite film;
step 3) first curing treatment: feeding the 0.02mm Al aluminum foil/0.02 mm LLDPE semi-finished product composite film prepared by compounding in the step 2 onto a material rack of a curing chamber for hanging curing;
step 4), gravure printing treatment: feeding the 0.02mm Al aluminum foil/0.02 mm LLDPE semi-finished composite film subjected to first curing into one end of a feeding shaft of a printing machine, sequentially feeding the semi-finished composite films into each color unit through the traction force of the printing machine, and transferring ink on the gravure printing machine to the surface of the AL aluminum foil to form the 0.02mm Al aluminum foil/0.02 mm LLDPE composite film under the action of the rubber wheel pressure of the printing machine;
step 5) second curing treatment: feeding the 0.02mm Al aluminum foil/0.02 mm LLDPE composite film prepared after printing in the step 4 onto a material rack of a curing chamber for hanging, sequentially carrying out curing on the 0.02mm Al aluminum foil/0.02 mm LLDPE composite film by an oven with the temperature of 45-68 ℃ in the curing chamber, and finally winding the composite film on a paper tube to finish printing curing of the composite film;
step 6) cooling treatment: cooling the cured composite film in the step 5 by a cooling roller of a printing machine;
step 7), slitting treatment: cutting the composite film cooled in the step 6 into a composite packaging film with a required specification through a cutting machine table of a three-summer machine, wherein the required cutting specification of the composite packaging film is 45mm thick x 500m long;
step 8) final inspection treatment: and sampling and detecting the cut composite packaging film to detect various performances of the composite packaging film.
Specifically, the sizing of the invention is to glue LLDPE by a glue spreader on a printing machine, the LLDPE is a linear low-density polyethylene film which has higher softening temperature and melting temperature, high strength, good toughness, high rigidity, heat resistance, good cold resistance, good environmental stress crack resistance, good impact strength, acid resistance, alkali resistance, low-temperature toughness, high modulus, bending resistance, good impact strength at low temperature and the like, therefore, the linear low-density polyethylene film is selected for sizing, the subsequent compositing of the LLDPE and an AL aluminum foil is facilitated, the mesh number selected for gluing by the glue spreader of the invention is 110 x 75, the mesh number is more than 110, the mesh number is more than 75, the paste amount is reduced, the paste layer is thinner and more uniform, thus the fineness of gluing by the glue spreader can be improved, the gluing amount of the glue spreader is 3-3.2 g/square meter.
Specifically, the compounding is carried out through a compounding machine, the model of the compounding machine is Fuji FL-2, dry compounding is adopted in a compounding mode, the speed of the compounding machine in the compounding process is 80M/min, and the material of the semi-finished composite membrane after the compounding treatment is AL aluminum foil with the width of 660mm and the thickness of 0.02 mm/LLDPE with the width of 660mm and the thickness of 0.02 mm.
In the step 3, 0.02mmAL aluminum foil/0.02 mmLLDPE semi-finished composite film is hung on a curing chamber, the printer sends the semi-finished composite film into the curing chamber through the tension of an oven, the tension of a drying channel sent into the oven needs 150N, the hanging time is 30 hours, the curing temperature of the semi-finished composite film in the curing chamber is 45 ℃, and the adhesive used in the step 2 before compounding is subjected to crosslinking reaction at the curing temperature of 45 ℃ through curing, so that the semi-finished composite film is cured, and the compounding fastness of the semi-finished composite film is enhanced.
Specifically, in the step 4 of the invention, when the cured 0.02mm AL/0.02mm LLDPE semi-finished composite film is placed at one end of a discharging shaft of a printing machine, first one-pass gravure printing is carried out by using a water bottom coating through a printing rubber roll device of the printing machine, then two-pass gravure printing is carried out by using red ink and yellow ink through the printing rubber roll device, then three-pass gravure printing is carried out by using thinner ink through the printing rubber roll device, and finally four-pass gravure printing is carried out by using the light ink through the printing rubber roll device, so that the ink is transferred to the surface of the AL aluminum foil.
Specifically, the model of the machine of the printing machine selected for the intaglio printing in the step 4 is Fuji FCD-14, the printing mode adopted by the printing machine is the intaglio printing, the speed of the printing machine in the printing process is 70M/min, the traction force required by the printing machine for sending the semi-finished composite film into each color unit is 150-160N, and the pressure of the rubber wheel of the printing machine is 0.35 MPa.
The parameters involved in feeding the semi-finished composite film to the ink units of the various colours in sequence in relation to the printing machine of the invention are shown in table one.
Watch 1
Specifically, the temperature required by the composite film in the step 5 in the curing process is 45 ℃, the time required by the curing is 12-13 hours, the composite film is cured at the temperature of 45 ℃, the solvent can be volatilized, and the ink can be dried, wherein the time required by the drying of the ink is 2-6 min, the dried composite film is rolled onto a paper tube through a printing machine, and the tension required by the printing machine to roll the composite film onto the paper tube is 80-90N.
After the composite film is cured for the second time, the composite film needs to be cooled at normal temperature, the temperature range of the normal temperature is 20-25 ℃, the cooling time is 24 hours, the composite film releases the internal stress generated in the gluing and inking reaction through the normal temperature cooling, so that the precipitation of the slipping agent in the LLDPE (linear low density polyethylene) at the inner layer is slowed down, the friction coefficient of the composite film is reduced, all properties of the composite film tend to be stable, and the output of the dimensional stability of the composite film during slitting is facilitated.
Example 1:
the invention provides a pre-compounded aluminum foil surface gravure printing method, which specifically comprises the following steps:
step 1) gluing treatment: sizing LLDPE with the thickness of 20 microns by a glue spreader on a printing machine, wherein the glue used for sizing is an adhesive, and the type and the proportion of the adhesive are SY-03G: SY-03B: ethyl ester 20:4.8: 28;
step 2) composite treatment: attaching the glued LLDPE and an AL aluminum foil with the thickness of 20 mu m to form a 0.02mm AL aluminum foil/0.02 mm LLDPE semi-finished product composite film;
step 3) first curing treatment: feeding the 0.02mm Al aluminum foil/0.02 mm LLDPE semi-finished composite film prepared by compounding in the step 2 to a material rest of a curing chamber for hanging curing, wherein the hanging time of the semi-finished composite film on the material rest of the curing chamber is 30 hours, and the curing temperature in the curing chamber is 45 ℃;
step 4), gravure printing treatment: feeding the 0.02mm Al aluminum foil/0.02 mm LLDPE semi-finished composite film subjected to first curing into one end of a feeding shaft of a printing machine, sequentially feeding the semi-finished composite film into each color unit through the traction force of the printing machine, and transferring ink on a gravure printing machine to the surface of the AL aluminum foil by the semi-finished composite film under the action of 0.35Mpa pressure of a rubber wheel of the printing machine so as to form the 0.02mm Al aluminum foil/0.02 mm LLDPE composite film;
step 5) second curing treatment: feeding the 0.02mm Al aluminum foil/0.02 mm LLDPE composite film prepared after printing in the step 4 onto a material rack of a curing chamber for hanging, sequentially carrying out curing on the 0.02mm Al aluminum foil/0.02 mm LLDPE composite film by an oven with the temperature of 68 ℃ in the curing chamber, and finally winding the composite film on a paper tube to finish the printing curing of the composite film;
step 6) cooling treatment: cooling the cured composite film in the step 5 by a cooling roller of a printing machine, wherein the cooling temperature is normal temperature, and the time required by cooling is 24 hours;
step 7), slitting treatment: cutting the composite film cooled in the step 6 into a composite packaging film with a required specification by a cutting machine table of a three-summer machine, wherein the required cutting specification is 45mm thick x 500M long, the speed required by the cutting machine table for cutting the composite packaging film is 100M/min, and specific parameters related to cutting are shown in a table two;
step 8) final inspection treatment: and sampling and detecting the cut composite packaging film, and detecting various properties of the composite packaging film, including detecting the size specification, physical and mechanical properties and solvent residue of the composite packaging film, wherein detected index parameters are shown in the third table.
Watch two
Watch III
The present invention has been described in detail, and it should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Claims (10)
1. A pre-compounded aluminum foil surface intaglio printing method comprises a printing method for printing an AL aluminum foil, and is characterized in that: the printing method is implemented on the basis of equipment of a printing machine, and comprises the following steps:
step 1) gluing treatment: sizing LLDPE with the thickness of 20 mu m, wherein the glue used for sizing is adhesive, and the type and the mixture ratio of the adhesive are SY-03G: SY-03B: ethyl ester 20:4.8: 28;
step 2) composite treatment: attaching the glued LLDPE and an AL aluminum foil with the thickness of 20 mu m to form a 0.02mm AL aluminum foil/0.02 mm LLDPE semi-finished product composite film;
step 3) first curing treatment: feeding the 0.02mm Al aluminum foil/0.02 mm LLDPE semi-finished product composite film prepared by compounding in the step 2 onto a material rack of a curing chamber for hanging curing;
step 4), gravure printing treatment: and feeding the 0.02mm Al aluminum foil/0.02 mm LLDPE semi-finished composite film subjected to first curing to one end of a feeding shaft of a printing machine, sequentially feeding the semi-finished composite films to each color unit through the traction force of the printing machine, and transferring the ink on the gravure printing machine to the surface of the AL aluminum foil to form the 0.02mm Al aluminum foil/0.02 mm LLDPE composite film under the action of the pressure of a rubber wheel of the printing machine.
2. The method for gravure printing of the surface of the aluminum foil after pre-compounding according to claim 1, wherein: the printing method further includes:
step 5) second curing treatment: feeding the 0.02mm Al aluminum foil/0.02 mm LLDPE composite film prepared after printing in the step 4 onto a material rack of a curing chamber for hanging, sequentially carrying out curing on the 0.02mm Al aluminum foil/0.02 mm LLDPE composite film by an oven with the temperature of 45-68 ℃ in the curing chamber, and finally winding the composite film on a paper tube to finish printing curing of the composite film;
step 6) cooling treatment: and (5) cooling the cured composite film in the step (5) by a cooling roller of a printing machine.
3. The method for gravure printing of the surface of the aluminum foil after pre-compounding according to claim 2, wherein: the printing method further includes:
step 7), slitting treatment: cutting the composite film cooled in the step 6 into a composite packaging film with a required specification through a cutting machine table of a three-summer machine, wherein the required cutting specification of the composite packaging film is 45mm thick x 500m long;
step 8) final inspection treatment: and sampling and detecting the cut composite packaging film to detect various performances of the composite packaging film.
4. The method for gravure printing of the surface of the aluminum foil after pre-compounding according to claim 1, wherein: and (2) rubberizing the LLDPE by a glue spreader of a printing machine in the step 1, wherein the rubberizing mesh of the glue spreader is 110 x 75, and the rubberizing amount of the glue spreader is 3-3.2g per square meter.
5. The method for gravure printing of the surface of the aluminum foil after pre-compounding according to claim 1, wherein: and (2) compounding through a compounding machine with a model of Fuji FL-2, wherein the compounding mode is dry compounding, the compounding speed of the compounding machine is 80M/min, and the material of the semi-finished product composite film after the compounding treatment is 660 x 0.02mmAL aluminum foil/660 x 0.02 mmLLDPE.
6. The method for gravure printing of the surface of the aluminum foil after pre-compounding according to claim 1, wherein: and 3, hanging the 0.02mmAL aluminum foil/0.02 mmLLDPE semi-finished composite film on a curing chamber for 30 hours at the curing temperature of 45 ℃, and curing to ensure that the adhesive used before compounding in the step 2 is subjected to crosslinking reaction at 45 ℃ and cured to enhance the compounding fastness of the semi-finished composite film.
7. The method for gravure printing of the surface of the aluminum foil after pre-compounding according to claim 1, wherein: and 4, when the cured 0.02mmAL/0.02mmLLDPE semi-finished composite film in the step 4 is placed at one end of a feeding shaft of a printing machine, firstly carrying out one-pass intaglio printing by using water bottom coating by a printing rubber roller device of the printing machine, secondly carrying out two-pass intaglio printing by using red ink and yellow ink by the printing rubber roller device, thirdly carrying out three-pass intaglio printing by using thinner ink by the printing rubber roller device, and finally carrying out four-pass intaglio printing by using the light ink by the printing rubber roller device so as to transfer the ink to the surface of the AL aluminum foil.
8. The method for gravure printing of the surface of the aluminum foil after pre-compounding according to claim 1, wherein: the model of the machine of the printing machine in the step 4 is Fuji FCD-14, the printing mode adopted by the printing machine is gravure printing, the printing speed of the printing machine is 70M/min, the traction force required by the printing machine to send the semi-finished composite film to each color unit is 150 and 160N, and the pressure of the rubber wheel of the printing machine is 0.35 Mpa.
9. The method for gravure printing of the surface of the aluminum foil after pre-compounding according to claim 2, wherein: in the step 5, the temperature required by the composite film in the curing process is 45 ℃, the curing time is 12-13 hours, the composite film is subjected to solvent volatilization and ink drying at the temperature of 45 ℃, and the tension required by winding the composite film on a paper tube is 80-90N.
10. The method for gravure printing of the surface of the aluminum foil after pre-compounding according to claim 2, wherein: and 6, after the composite film is cured, cooling at normal temperature of 20-25 ℃ for 24 hours, wherein the composite film releases internal stress generated in gluing and inking reactions through normal-temperature cooling so as to slow down the precipitation of the LLDPE slipping agent on the inner layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110404295.9A CN113103786B (en) | 2021-04-15 | 2021-04-15 | Gravure printing method for surface of pre-compounded aluminum foil |
Applications Claiming Priority (1)
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Cited By (1)
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| CN114055906A (en) * | 2021-11-30 | 2022-02-18 | 汕头市利农印刷有限公司 | Flexible package manufacturing method for relief printing |
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| CN113103786B (en) | 2023-05-16 |
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