CN108673967B - Mill finish laser composite packaging film for cigarettes and preparation method thereof - Google Patents
Mill finish laser composite packaging film for cigarettes and preparation method thereof Download PDFInfo
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- CN108673967B CN108673967B CN201810274771.8A CN201810274771A CN108673967B CN 108673967 B CN108673967 B CN 108673967B CN 201810274771 A CN201810274771 A CN 201810274771A CN 108673967 B CN108673967 B CN 108673967B
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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
- 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
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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
- 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
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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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer 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
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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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
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/10—Intaglio printing ; Gravure printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/26—Printing on other surfaces than ordinary paper
- B41M1/30—Printing on other surfaces than ordinary paper on organic plastics, horn or similar materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/584—Scratch resistance
Abstract
The invention discloses a composite packaging film for a smooth surface laser cigarette and a preparation method thereof. The invention can be used independently, can also be used after being compounded with an aluminized packaging film and the like, and can keep double-sided heat sealing by being compounded with the aluminized surface of the aluminized packaging film, thereby not only realizing the laser printing function, but also avoiding the scratching of the aluminized layer. The invention further expands the function of the composite packaging film for cigarettes.
Description
Technical Field
The invention belongs to the technical field of novel polymer packaging materials, and particularly relates to a composite packaging film for a glossy laser cigarette and a preparation method thereof.
Background
The conventional cigarette packaging film is a transparent biaxially oriented polypropylene film. According to the current packaging mode, a layer of transparent packaging film is added outside the paper cigarette label to play a certain sealing role. Compared with other products in the packaging industry, the laser packaging material not only has novel and bright appearance effect, but also has high-technology anti-counterfeiting function, so that the application of the laser packaging film is required to be increasingly wide in order to improve the product competitiveness. However, the existing laser composite packaging film has many problems, for example, due to the problems of insufficient compatibility and adhesion between the laser printing films, laser imprinted patterns are not clear and are easy to fall off, after laser imprinting or printing, the heat sealing performance is reduced, and the like, so that high-quality cigarette packaging film products suitable for cigarettes are difficult to obtain.
Therefore, in order to solve the above problems, there is a need to develop a composite packaging film for smooth surface laser cigarettes and a preparation method thereof.
Disclosure of Invention
The invention aims to provide a composite packaging film for smooth surface laser cigarettes, and the invention aims to provide a preparation method of the composite packaging film for smooth surface laser cigarettes.
The first purpose of the invention is realized by adopting a one-side heat-sealable smooth laser BOPP base material film as the smooth laser cigarette composite packaging film, firstly carrying out laser stamping on the inner layer, and then printing on the laser surface.
The second object of the present invention is achieved by comprising the steps of:
A. preparing a smooth substrate film: the polypropylene film is prepared by adopting a multi-layer co-extrusion polypropylene biaxial stretching preparation process and a polypropylene film, wherein the longitudinal stretching temperature is 70-130 ℃, the transverse stretching temperature is 100-175 ℃, the temperature of an extruder is 200-250 ℃, and the stretching ratio is 4-10;
B. laser embossing process: stamping a laser pattern on the layer B of the base material film by adopting a laser mould pressing process;
C. printing ink: after laser stamping is finished, surface polarity treatment is firstly carried out, then ink printing is further carried out on a laser surface, and printing is finished by adopting environment-friendly water-based ink and an intaglio inner printing process.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention creatively provides a composite packaging film for a glossy laser cigarette, which is used for laser embossing, printing and compounding, and well solves the problems of compatibility and adhesive force between the conventional laser surface and the printing surface.
2. The composite packaging film for the glossy laser cigarette comprises a glossy laser biaxially oriented polypropylene film base material, and can realize laser imprinting on the inner surface and further print on the laser surface. The invention can be used independently, can also be used after being compounded with an aluminized packaging film and the like, and can keep double-sided heat sealing by being compounded with the aluminized surface of the aluminized packaging film, thereby not only realizing the laser printing function, but also avoiding the scratching of the aluminized layer. The invention further expands the function of the composite packaging film for cigarettes.
3. According to the invention, the heat-sealing initial temperature is reduced to 80 ℃ on the basis of ensuring the existing functions by adjusting and optimizing the material formulas of the outer layer and the inner layer, the temperature is reduced by about 40 ℃ compared with the prior art, the heat-sealing initial temperature is reduced, the energy consumption is effectively reduced in use, and the method is environment-friendly.
4. According to the invention, through a scientific material formula and a preparation process, the laser printing layer and the aluminum plating layer of the compounded packaging film have good adhesive force and have no phenomena of white spots, dealumination and the like.
5. The invention adopts special material formula design, so that the obtained composite packaging film has the properties of laser property, aluminizing property, printing property and heat sealing property; the structure form is as follows: the multilayer structure of the heat sealing layer, the aluminum coating layer, the composite layer, the printing laser layer and the heat sealing layer can be widely applied.
6. According to the invention, through the screening optimization of the substrate formula of the three-layer structure single-side heat-sealable smooth-surface laser BOPP substrate film, the stability of the performance of the substrate film in the post-processing process is well solved, and the stability of the substrate performance in the processing process comprising the processes of substrate processing, laser imprinting, gravure printing, vacuum aluminum plating, compounding and the like is realized, so that the stable production of products is realized.
7. The invention needs to further print on the laser surface, has high requirements on the selection of the raw material of the inner layer (B layer) of the base material and the adhesive force of the surface, and solves the problems through the base material formula design and the surface treatment method. After the surface polarity treatment is carried out on the laser surface (layer B), the surface wettability can reach 44 dyne, and the adhesive force of laser and printing is ensured.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention is further illustrated by the following examples, which are not intended to be limiting in any way, and any modifications or alterations based on the teachings of the present invention are intended to fall within the scope of the present invention.
The composite packaging film for the glossy laser cigarette is obtained by adopting a glossy laser BOPP base material film with a heat-sealable single surface, carrying out laser stamping on an inner layer, and then printing on a laser surface.
The single-side heat-sealable smooth laser BOPP base material film comprises an inner layer, an outer layer and a core layer arranged between the inner layer and the outer layer, wherein the core layer comprises homopolymer polypropylene, hydrocarbon resin and master batch; the outer layer is a heat-sealing layer and comprises a main material and an additive, wherein the main material is a copolymer, and the additive is one or more of polyethylene, polybutylene, polydimethylsiloxane, silicone oil, silicon dioxide, polymethyl methacrylate, polymethylsiloxane and natural quartz; the inner layer is a laser layer, the laser layer comprises a main material and an additive, the main material is a copolymer, and the additive is one or more of silicon dioxide, polymethyl methacrylate, polymethyl siloxane, silica gel and natural quartz.
The copolymer in the inner layer and the outer layer is a binary copolymer and/or a terpolymer, the binary copolymer is a binary copolymer A (50-95%), wherein 50-95% refers to any one of a binary copolymer B (50-95%) and a binary copolymer C (50-95%), and the terpolymer is any one of a terpolymer A (50-95%), a terpolymer B (50-95%) and a terpolymer C (50-95%); the melt mass flow rate MFR =5.0-5.42g/10min for bipolymer A, the melt mass flow rate MFR =5.40-5.80g/10min for bipolymer B, and the melt mass flow rate MFR =5.83-6.1g/10min for bipolymer C; the melt mass flow rate MFR =5.5-5.90g/10min for the terpolymer A, the melt mass flow rate MFR =5.91-6.5g/10min for the terpolymer B, and the melt mass flow rate MFR =6.51-7.20g/10min for the terpolymer C.
Both copolymers and terpolymers herein meeting the above MFR values can be used to practice the invention.
The core layer comprises a master batch which is an antistatic agent and/or a stiffening agent; the antistatic agent is one or more of fatty acid ester, ethoxyamine, diethanolamide, ethoxylated alcohol, glyceryl monostearate and glyceryl distearate.
The laser imprinting is to transfer a holographic image with rainbow dynamic and three-dimensional effects to an inner layer of a smooth laser BOPP substrate film by adopting a 3D true color holographic technology and a multiple and dynamic imaging technology through mould pressing.
The printing is to print the required pattern on the laser surface by adopting environment-friendly water-based ink.
The composite packaging film for the glossy laser cigarette adopts a glossy laser BOPP base material film with a single surface capable of being thermally sealed, firstly carries out laser imprinting on an inner layer, then carries out printing on a laser surface, and finally carries out composite processing between the printing layer and an aluminum plating layer of an aluminum plating packaging film by using an adhesive.
The adhesive is one or more of solvent-free polyurethane adhesive and acrylate water-soluble adhesive.
The preparation method of the composite packaging film for the smooth laser cigarette comprises the following steps:
A. preparing a smooth substrate film: the polypropylene film is prepared by adopting a multi-layer co-extrusion polypropylene biaxial stretching preparation process and a polypropylene film, wherein the longitudinal stretching temperature is 70-130 ℃, the transverse stretching temperature is 100-175 ℃, the temperature of an extruder is 200-250 ℃, and the stretching ratio is 4-10;
B. laser embossing process: stamping a laser pattern on the layer B of the base material film by adopting a laser mould pressing process; the main process of the laser mould pressing comprises the following steps: electroforming, plate making, unreeling, preheating, mould pressing, cooling and reeling;
C. printing ink: after laser stamping is finished, surface polarity treatment is firstly carried out, then ink printing is further carried out on a laser surface, and printing is finished by adopting environment-friendly water-based ink and an intaglio inner printing process. The main process of gravure inner printing comprises the following steps: pattern design-plate making-printing-rolling. The surface polarity treatment method is any one of a corona treatment method, a chemical treatment method, a mechanical roughening method and a coating method, and the corona treatment method is preferred.
The preparation method also comprises the step D of compounding: and C, compounding the printing layer printed by the ink in the step C and the aluminized layer of the aluminized packaging film by using an adhesive by adopting a dry compounding process or a solvent-free compounding process, wherein if the dry compounding process is adopted, the bonding temperature is 50-90 ℃, and the double-sided heat-sealable multilayer composite film with the smooth surface laser can be obtained.
The embodiment of the laser printing packaging film (the single-side heat-sealable smooth laser BOPP substrate film) provided by the invention is as follows:
note: copolymers, terpolymers, polybutene having a total comonomer content A > B > C.
Examples of the aluminum-plated packaging film of the present invention are as follows:
note: copolymers, terpolymers, polybutene having a total comonomer content A > B > C.
Example 20
The preparation method of the composite packaging film for the smooth laser cigarettes in the embodiment 1 comprises the following steps:
A. preparing a smooth substrate film: the polypropylene film is prepared by adopting a multi-layer co-extrusion polypropylene biaxial stretching preparation process and a polypropylene film, wherein the longitudinal stretching temperature is 70 ℃, the transverse stretching temperature is 100 ℃, the temperature of an extruder is 200 ℃, and the stretching ratio is 4;
B. laser embossing process: stamping a laser pattern on the layer B (namely the inner layer) of the base material film by adopting a laser mould pressing process; the laser mould pressing process comprises the following steps: electroforming, plate making, unreeling, preheating, mould pressing, cooling and reeling;
C. printing ink: after laser stamping is finished, surface polarity treatment is firstly carried out, then ink printing is further carried out on a laser surface, and printing is finished by adopting environment-friendly water-based ink and an intaglio inner printing process. The main process of gravure inner printing comprises the following steps: pattern design-plate making-printing-rolling. The surface polarity treatment method is any one of a corona treatment method, a chemical treatment method, a mechanical roughening method and a coating method, and the corona treatment method is preferred.
The water vapor transmission rate of the composite packaging film for the smooth laser cigarette prepared by the embodiment is less than or equal to 0.48 g/m2Day, oxygen transmission rate not greater than 32 cc/m2Day, therefore the composite packaging film of the invention has extremely high barrier property and good heat sealing property, simultaneously overcomes the defects of the existing aluminized and printed cigarette films, and effectively enhances the functionality of the cigarette packaging film.
Example 21
Selecting a solvent-free polyurethane adhesive as an adhesive to carry out composite processing on the laser printing packaging film obtained in the embodiment 2 and the aluminized packaging film obtained in the embodiment 11 to obtain a composite packaging film, wherein the preparation method comprises the following steps:
A. preparing a smooth substrate film: the polypropylene film is prepared by adopting a multi-layer co-extrusion polypropylene biaxial stretching preparation process and a polypropylene film, wherein the longitudinal stretching temperature is 130 ℃, the transverse stretching temperature is 175 ℃, the temperature of an extruder is 250 ℃, and the stretching ratio is 10;
B. laser embossing process: stamping a laser pattern on the layer B of the base material film by adopting a laser mould pressing process; the laser mould pressing process comprises the following steps: electroforming, plate making, unreeling, preheating, mould pressing, cooling and reeling;
C. printing ink: after laser imprinting is finished, performing surface polarity treatment, further performing ink printing on a laser surface, and finishing printing by adopting environment-friendly water-based ink through an intaglio inner printing process; the main process of gravure inner printing comprises the following steps: pattern design, plate making, printing and rolling; the surface polarity treatment method is a corona treatment method;
D. preparing an aluminum-plated packaging film: the polypropylene film is prepared by adopting a multi-layer co-extrusion polypropylene biaxial stretching preparation process and a polypropylene film vacuum aluminizing processing process, wherein the longitudinal stretching temperature is 130 ℃, the transverse stretching temperature is 175 ℃, the temperature of an extruder is 250 ℃, and the stretching ratio is 10; vacuum degree of 1.3X 10-3Pa, the temperature of the evaporation boat is 1400 ℃, and the purity of the aluminum wire is 99.9 percent;
E. the composite process comprises the following steps: and D, compounding the printing layer printed by the ink in the step C and the aluminized layer of the aluminized packaging film by using an adhesive by adopting a dry compounding process, wherein the bonding temperature is 50 ℃, and thus the double-sided heat-sealable multilayer composite film with the smooth surface laser can be obtained.
The laser printing packaging film prepared in this example had a water vapor transmission rate =6 g/m2Day, oxygen transmission rate =1700 cc/m2Day; the water vapor transmission rate of the aluminum-plated packaging film is =0.50 g/m2Day, oxygen transmission =60 cc/m2Day; the water vapor transmission rate of the laser printing aluminized cigarette composite packaging film obtained by final composite processing is less than or equal to 0.4 g/m2Day, oxygen transmission rate not more than 31 cc/m2Day, therefore the composite packaging film of the invention has extremely high barrier property and good heat sealing property, simultaneously overcomes the defects of the prior aluminized and printed cigarette films, and effectively enhances the function of the cigarette packaging filmAnd (4) sex.
Example 22
Selecting an acrylate hydrosolvent type adhesive as an adhesive to carry out composite processing on the laser printing packaging film obtained in the embodiment 3 and the aluminized packaging film obtained in the embodiment 18 to obtain the aluminized printing composite packaging film for cigarettes, wherein the preparation method comprises the following steps:
A. preparing a smooth substrate film: the polypropylene film is prepared by adopting a multi-layer co-extrusion polypropylene biaxial stretching preparation process and a polypropylene film, wherein the longitudinal stretching temperature is 85 ℃, the transverse stretching temperature is 125 ℃, the temperature of an extruder is 210 ℃, and the stretching ratio is 5;
B. laser embossing process: stamping a laser pattern on the layer B of the base material film by adopting a laser mould pressing process; the main process of the laser mould pressing comprises the following steps: electroforming, plate making, unreeling, preheating, mould pressing, cooling and reeling;
C. printing ink: after laser imprinting is finished, performing surface polarity treatment, further performing ink printing on a laser surface, and finishing printing by adopting environment-friendly water-based ink through an intaglio inner printing process; the main process of gravure inner printing comprises the following steps: pattern design, plate making, printing and rolling; the surface polarity treatment method is a corona treatment method;
D. preparing an aluminum-plated packaging film: the polypropylene film is prepared by adopting a multi-layer co-extrusion polypropylene biaxial stretching preparation process and a polypropylene film vacuum aluminizing processing process, wherein the longitudinal stretching temperature is 100 ℃, the transverse stretching temperature is 150 ℃, the temperature of an extruder is 220 ℃, and the stretching ratio is 6; degree of vacuum of 5X 10-3Pa, the temperature of the evaporation boat is 1300 ℃, and the purity of the aluminum wire is 99.9 percent;
E. the composite process comprises the following steps: and compounding the printing layer of the laser printing packaging film and the aluminized layer of the aluminized packaging film by adopting a dry compounding process, wherein the bonding temperature is 90 ℃, and thus obtaining the laser packaging film.
The laser printing packaging film prepared in this example had a water vapor transmission rate =7 g/m2Day, oxygen transmission rate =1700 cc/m2Day; the water vapor transmission rate of the aluminum-plated packaging film is =0.55 g/m2Day, oxygen transmission =50 cc/m2Day; to the utmostThe water vapor transmission rate of the laser printing aluminized cigarette composite packaging film obtained by final composite processing is less than or equal to 0.42 g/m2Day, oxygen transmission rate not more than 30 cc/m2Day, therefore the composite packaging film of the invention has extremely high barrier property and good heat sealing property, simultaneously overcomes the defects of the existing aluminized and printed cigarette films, and effectively enhances the functionality of the cigarette packaging film.
Example 23
Selecting a solvent-free polyurethane adhesive as an adhesive to carry out composite processing on the laser printing packaging film obtained in the embodiment 6 and the aluminized packaging film obtained in the embodiment 16 to obtain the composite packaging film for the laser printing aluminized cigarette, wherein the preparation method comprises the following steps:
A. preparing a smooth substrate film: the polypropylene film is prepared by adopting a multi-layer co-extrusion polypropylene biaxial stretching preparation process and a polypropylene film, wherein the longitudinal stretching temperature is 95 ℃, the transverse stretching temperature is 135 ℃, the temperature of an extruder is 235 ℃, and the stretching ratio is 6;
B. laser embossing process: stamping a laser pattern on the layer B of the base material film by adopting a laser mould pressing process; the main process of the laser mould pressing comprises the following steps: electroforming, plate making, unreeling, preheating, mould pressing, cooling and reeling;
C. printing ink: after laser imprinting is finished, performing surface polarity treatment, further performing ink printing on a laser surface, and finishing printing by adopting environment-friendly water-based ink through an intaglio inner printing process; the main process of gravure inner printing comprises the following steps: pattern design, plate making, printing and rolling; the surface polarity treatment method is a chemical treatment method.
D. Preparing an aluminum-plated packaging film: the polypropylene film is prepared by adopting a multi-layer co-extrusion polypropylene biaxial stretching preparation process and a polypropylene film vacuum aluminizing processing process, wherein the longitudinal stretching temperature is 80 ℃, the transverse stretching temperature is 120 ℃, the temperature of an extruder is 210 ℃, and the stretching ratio is 8; degree of vacuum 10X 10-3Pa, the temperature of the evaporation boat is 1250 ℃, and the purity of the aluminum wire is 99.9 percent;
E. the composite process comprises the following steps: and C, compounding the printing layer printed by the ink in the step C and the aluminum-plated layer of the aluminum-plated packaging film by using an adhesive by adopting a solvent-free compounding process to obtain the double-sided heat-sealable multilayer composite film with the laser surface.
The laser printing packaging film prepared in this example had a water vapor transmission rate =6 g/m2Day, oxygen transmission rate =1700 cc/m2. day; the water vapor transmission rate of the aluminum-plated packaging film is =0.6 g/m2Day, oxygen transmission rate =60 cc/m2. day; the water vapor transmission rate of the laser printing aluminized cigarette composite packaging film obtained by final composite processing is less than or equal to 0.45 g/m2Day, the oxygen transmission rate is less than or equal to 31 cc/m2.day, therefore, the composite packaging film of the invention has extremely high barrier property and good heat sealing property, simultaneously overcomes the defects of the existing aluminized and printed cigarette films, and effectively enhances the functionality of the cigarette packaging film.
Example 24
Selecting a solvent-free polyurethane adhesive and an acrylate water-soluble adhesive as adhesives to carry out composite processing on the laser printing packaging film obtained in the embodiment 9 and the aluminized packaging film obtained in the embodiment 13 to obtain the composite packaging film for the laser printing aluminized cigarette, wherein the preparation method comprises the following steps:
A. preparing a laser printing packaging film: the preparation method comprises the steps of preparing the polypropylene film by adopting a multi-layer co-extrusion polypropylene biaxial stretching preparation process, laser imprinting the polypropylene film, then carrying out gravure printing, and carrying out inner printing, wherein the longitudinal stretching temperature is 110 ℃, the transverse stretching temperature is 160 ℃, the temperature of an extruder is 240 ℃, and the stretching ratio is 7;
B. preparing an aluminum-plated packaging film: the polypropylene film is prepared by adopting a multi-layer co-extrusion polypropylene biaxial stretching preparation process and a polypropylene film vacuum aluminizing processing process, wherein the longitudinal stretching temperature is 110 ℃, the transverse stretching temperature is 160 ℃, the temperature of an extruder is 240 ℃, and the stretching ratio is 7; degree of vacuum of 3X 10-3Pa, the temperature of the evaporation boat is 1350 ℃, and the purity of the aluminum wire is 99.9 percent;
C. the composite process comprises the following steps: and compounding the printing layer of the laser printing packaging film and the aluminized layer of the aluminized packaging film by adopting a dry compounding process, wherein the bonding temperature is 85 ℃, and thus obtaining the laser packaging film.
The water vapor transmission rate of the laser printing packaging film prepared by the embodiment=6 g/m2Day, oxygen transmission rate =1600 cc/m2Day; the water vapor transmission rate of the aluminum-plated packaging film is =0.6 g/m2Day, oxygen transmission =60 cc/m2Day; the water vapor transmission rate of the composite packaging film for the aluminized printed cigarette obtained by final composite processing is less than or equal to 0.51 g/m2Day, oxygen transmission rate not more than 35 cc/m2Day, therefore the composite packaging film of the invention has extremely high barrier property and good heat sealing property, simultaneously overcomes the defects of the existing aluminized and printed cigarette films, and effectively enhances the functionality of the cigarette packaging film.
Claims (7)
1. A composite packaging film for a smooth surface laser cigarette is characterized in that the composite packaging film for the smooth surface laser cigarette is a single-surface heat-sealable smooth surface laser BOPP base material film, laser stamping is performed on an inner layer, and then printing is performed on a laser surface to obtain the composite packaging film; the single-side heat-sealable smooth laser BOPP base material film comprises an inner layer, an outer layer and a core layer arranged between the inner layer and the outer layer; the core layer comprises homopolymer polypropylene, hydrocarbon resin and master batch, the master batch contained in the core layer is an antistatic agent and/or a stiffening agent, and the antistatic agent is one or more of fatty acid ester, ethoxyamine, diethanolamide, ethoxylated alcohol, glyceryl monostearate and glyceryl distearate; the outer layer is a heat-sealing layer and comprises a main material and an additive, wherein the main material is a copolymer, and the additive is one or more of polyethylene, polybutylene, polydimethylsiloxane, silicone oil, silicon dioxide, polymethyl methacrylate, polymethylsiloxane and natural quartz; the inner layer is a laser layer, the laser layer comprises a main material and an additive, the main material is a copolymer, and the additive is one or more of silicon dioxide, polymethyl methacrylate, polymethyl siloxane, silica gel and natural quartz; the copolymer in the inner layer and the outer layer is a binary copolymer and/or a terpolymer, the binary copolymer is any one of a binary copolymer A, a binary copolymer B and a binary copolymer C with the purity of 50-95%, and the terpolymer is any one of a ternary copolymer A, a ternary copolymer B and a ternary copolymer C with the purity of 50-95%; the melt mass flow rate MFR =5.0-5.42g/10min for bipolymer A, 5.40-5.80g/10min for bipolymer B, 5.83-6.1g/10min for bipolymer C; the melt mass flow rate MFR =5.5-5.90g/10min for terpolymer A, 5.91-6.5g/10min for terpolymer B, and 6.51-7.20g/10min for terpolymer C.
2. The composite packaging film for smooth laser cigarettes of claim 1, wherein the laser embossing is to transfer a holographic image with rainbow dynamic and three-dimensional effects to the inner layer of the smooth laser BOPP substrate film by using 3D true color holographic technology, multiple and dynamic imaging technology through die pressing.
3. The composite packaging film for smooth laser cigarettes as claimed in claim 1, wherein the printing is to print the required pattern on the laser surface by using environment-friendly water-based ink.
4. The composite packaging film for the smooth laser cigarette as claimed in claim 1, wherein the composite packaging film for the smooth laser cigarette is obtained by performing laser imprinting on an inner layer, performing printing on a laser surface, and performing composite processing between a printing layer and an aluminum plating layer of an aluminum plating packaging film by using an adhesive, wherein the single-sided heat-sealable smooth laser BOPP base material film is adopted.
5. The composite packaging film for smooth laser cigarettes of claim 4, wherein the adhesive is one or two of a solvent-free polyurethane adhesive and an acrylate hydrosol type adhesive.
6. The preparation method of the composite packaging film for the smooth laser cigarettes in claim 1 is characterized by comprising the following steps:
A. preparing a smooth substrate film: the polypropylene film is prepared by adopting a multi-layer co-extrusion polypropylene biaxial stretching preparation process and a polypropylene film, wherein the longitudinal stretching temperature is 70-130 ℃, the transverse stretching temperature is 100-175 ℃, the temperature of an extruder is 200-250 ℃, and the stretching ratio is 4-10;
B. laser embossing process: stamping a laser pattern on the inner layer of the base material film by adopting a laser mould pressing process;
C. printing ink: after laser stamping is finished, surface polarity treatment is firstly carried out, then ink printing is further carried out on a laser surface, and printing is finished by adopting environment-friendly water-based ink and an intaglio inner printing process.
7. The preparation method according to claim 6, characterized in that the preparation method further comprises a step D of compounding: and C, compounding the printing layer printed by the ink in the step C and the aluminized layer of the aluminized packaging film by using an adhesive by adopting a dry compounding process or a solvent-free compounding process, wherein if the dry compounding process is adopted, the bonding temperature is 50-90 ℃.
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| CN201810274771.8A CN108673967B (en) | 2018-03-30 | 2018-03-30 | Mill finish laser composite packaging film for cigarettes and preparation method thereof |
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| CN109532173B (en) * | 2018-12-17 | 2019-08-13 | 广东德冠包装材料有限公司 | A kind of moldable bidirectional stretching polypropylene film and its preparation method and application |
| CN110509599B (en) * | 2019-08-09 | 2021-04-02 | 南京金陵金箔集团股份有限公司 | Production process of moisture-keeping bag for packaging |
| CN111703159B (en) * | 2020-06-09 | 2022-07-08 | 安徽国风新材料股份有限公司 | High-aluminum-fastness BOPP (biaxially-oriented polypropylene) base film for low-temperature laser mould pressing and preparation method thereof |
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| CN1362328A (en) * | 2002-01-11 | 2002-08-07 | 中包云梦塑料薄膜厂 | Biaxial stretching polypropylene base film for laser coining transfer and its production process |
| CN2630151Y (en) * | 2002-11-01 | 2004-08-04 | 海南赛诺实业有限公司 | Laser holographic antifake shrinkage membrane |
| CN100454180C (en) * | 2005-06-25 | 2009-01-21 | 广东东南薄膜科技股份有限公司 | Manufacturing method of located laser spray coating material |
| DE102007059189A1 (en) * | 2007-12-06 | 2009-06-10 | Wipak Walsrode Gmbh & Co. Kg | Resealable packaging |
| CN101725077B (en) * | 2009-12-14 | 2011-12-28 | 李飚 | Method for manufacturing holographic aluminized paper material |
| CN206426699U (en) * | 2017-01-03 | 2017-08-22 | 温州宏达激光图像有限公司 | Wash aluminium transfer laser film |
| CN107804039B (en) * | 2017-10-30 | 2020-03-20 | 云南昆岭薄膜工业有限公司 | Aluminum-plated printed composite packaging film for cigarettes and preparation method thereof |
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