CN113583285A - Superstrong wear-resistant cigarette packaging film and preparation method thereof - Google Patents

Superstrong wear-resistant cigarette packaging film and preparation method thereof Download PDF

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Publication number
CN113583285A
CN113583285A CN202110891372.8A CN202110891372A CN113583285A CN 113583285 A CN113583285 A CN 113583285A CN 202110891372 A CN202110891372 A CN 202110891372A CN 113583285 A CN113583285 A CN 113583285A
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heat
solid content
coating
packaging film
bopp
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黎坛
王俊峰
王恩飞
黎海鸥
符旺妙
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Hainan Shiner Industrial Co Ltd
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Hainan Shiner Industrial Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/052—Forming heat-sealable coatings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D127/04—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C09D127/08—Homopolymers or copolymers of vinylidene chloride
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/65—Additives macromolecular
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/10—Homopolymers or copolymers of propene
    • C08J2323/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2427/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08J2427/08—Homopolymers or copolymers of vinylidene chloride
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2433/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2475/04—Polyurethanes

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
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  • Polymers & Plastics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Inorganic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)

Abstract

The invention provides a super-strong wear-resistant cigarette packaging film and a preparation method thereof, wherein the packaging film comprises a BOPP single-side heat-sealing film; the solvent type polyurethane adhesive layer and the polyvinylidene chloride layer are sequentially arranged on the heat sealing surface of the BOPP single-side heat sealing film; the polyvinylidene chloride layer is prepared from polyvinylidene chloride with the solid content of 30-50%, wax emulsion with the solid content of 25% and silicon dioxide in a mass ratio of 100 (2-10) to (0.1-1); the waterborne polyurethane adhesive layer and the acrylic acid layer are sequentially arranged on the non-heat-sealing surface of the BOPP single-side heat-sealing film; the preparation raw materials of the acrylic acid layer comprise (by mass ratio) 100 (2-10) acrylic acid with solid content of 15-30%, wax emulsion with solid content of 25% and silicon dioxide with solid content of 0.1-1. The packaging film has high wear resistance and heat seal strength; it also has high glossiness.

Description

Superstrong wear-resistant cigarette packaging film and preparation method thereof
Technical Field
The invention belongs to the technical field of cigarette packaging films, and particularly relates to a super-strong wear-resistant cigarette packaging film and a preparation method thereof.
Background
The traditional BOPP cigarette packaging film is mainly a three-layer co-extrusion process, the main material of the smooth surface of the BOPP cigarette packaging film is the co-polypropylene, and the co-polypropylene is an amorphous material, so that the BOPP cigarette packaging film is not resistant to friction and is easy to scratch.
The traditional BOPP cigarette packaging film can generate the phenomena of scratching and fogging in cigarette packaging, logistics and sales links due to friction with cigarette packet machinery, mutual friction among cigarettes and friction with other objects, so that the grade of the cigarettes is reduced, and the purchase desire of consumers is influenced.
Disclosure of Invention
In view of the above, the invention aims to provide a superstrong wear-resistant cigarette packaging film and a preparation method thereof, wherein the film has high heat-seal strength and good wear resistance.
The invention provides a super wear-resistant cigarette packaging film which comprises a BOPP single-side heat-sealing film;
the solvent type polyurethane adhesive layer and the polyvinylidene chloride layer are sequentially arranged on the heat sealing surface of the BOPP single-side heat sealing film; the polyvinylidene chloride layer is prepared from polyvinylidene chloride with the solid content of 30-50%, wax emulsion with the solid content of 25% and silicon dioxide in a mass ratio of 100 (2-10) to (0.1-1);
the waterborne polyurethane adhesive layer and the acrylic acid layer are sequentially arranged on the non-heat-sealing surface of the BOPP single-side heat-sealing film; the preparation raw materials of the acrylic acid layer comprise (by mass ratio) 100 (2-10) acrylic acid with solid content of 15-30%, wax emulsion with solid content of 25% and silicon dioxide with solid content of 0.1-1.
In the present invention, the solvent-based polyurethane adhesive layer and the polyvinylidene chloride layer serve as the slip surface of the packaging film, i.e., the surface of the film that is in direct contact with the equipment used in the manufacturing process during the packaging process. The aqueous polyurethane adhesive layer and the acrylic acid layer are used as cigarette packet surfaces of the packaging film, namely the surfaces of the film and cigarettes which are in direct contact in the packaging process. The heat seal strength of the smooth surface to the cigarette packet surface reaches more than 2.5N/15 mm.
In the invention, the solvent type polyurethane adhesive layer is prepared by coating solvent type polyurethane, the solid content is 45-75%, and the carrier is ethyl acetate;
the water-based polyurethane adhesive is prepared by coating polyurethane with the solid content of 20-40%.
According to the invention, the heat-sealing surface is coated with the solvent type polyurethane adhesive layer and then coated with the polyvinylidene chloride emulsion, and the crystallinity of the polyvinylidene chloride emulsion is improved after drying, so that the wear resistance is improved.
In the present invention, the wax emulsion with a solid content of 25% comprises palm wax and water.
In the invention, the silicon dioxide is natural silicon dioxide with the particle size of 3-5 microns.
In the invention, the thickness of the solvent type polyurethane adhesive layer is 0.1-1 micron, and the thickness of the polyvinylidene chloride layer is 0.5-3 micron;
the thickness of the waterborne polyurethane adhesive layer is 0.1-1 micron, and the thickness of the acrylic acid layer is 0.5-2 micron.
In the invention, the thickness of the BOPP single-side heat-sealing film is 18-30 microns, the shrinkage rate is 2-10%, the surface tension of a heat-sealing surface is not less than 35 dynes, and the surface tension of a non-heat-sealing surface is not less than 36 dynes. The heat sealing strength of the heat sealing surface of the BOPP single-sided heat sealing film to the heat sealing surface is more than or equal to 2N/15mm (1 second, 120 ℃, and the pressure is 0.18 mPa).
The invention provides a preparation method of a superstrong wear-resistant cigarette packaging film, which comprises the following steps:
coating a primary coating solvent type polyurethane adhesive and a surface coating polyvinylidene chloride emulsion on the heat-sealing surface of the BOPP single-sided heat-sealing film in sequence, and drying;
and then sequentially coating a primary coating waterborne polyurethane adhesive and a surface coating acrylic coating on the non-heat-sealing surface of the BOPP single-side heat-sealing film, and drying to obtain the super-strong wear-resistant cigarette packaging film.
In the invention, the drying temperature is 70-120 ℃;
the coating speed is 80-200 m/min.
The invention provides a super wear-resistant cigarette packaging film which comprises a BOPP single-side heat-sealing film; the solvent type polyurethane adhesive layer and the polyvinylidene chloride layer are sequentially arranged on the heat sealing surface of the BOPP single-side heat sealing film; the polyvinylidene chloride layer is prepared from polyvinylidene chloride with the solid content of 30-50%, wax emulsion with the solid content of 25% and silicon dioxide in a mass ratio of 100 (2-10) to (0.1-1); the waterborne polyurethane adhesive layer and the acrylic acid layer are sequentially arranged on the non-heat-sealing surface of the BOPP single-side heat-sealing film; the preparation raw materials of the acrylic acid layer comprise (by mass ratio) 100 (2-10) acrylic acid with solid content of 15-30%, wax emulsion with solid content of 25% and silicon dioxide with solid content of 0.1-1. According to the invention, the solvent type polyurethane adhesive layer and the polyvinylidene chloride layer are used as the smooth surface of the packaging film, and the water-based polyurethane adhesive layer and the acrylic acid layer are used as the cigarette wrapping surface, so that the packaging film has high wear resistance and heat sealing strength under the combined action; it also has high glossiness. The experimental results show that: the wear resistance of the super-strong wear-resistant cigarette packaging film is HO grade, the heat sealing strength is 2.85-3.23N/15 mm, and the haze is 1.9% -2.3%.
Detailed Description
For further illustration of the present invention, the following describes in detail a super wear-resistant cigarette packaging film and a preparation method thereof provided by the present invention with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
And (3) coating the 25-micron BOPP single-side heat-sealing film, wherein the bottom coating thickness of the cigarette pack surface coating is 0.1 micron, and the top coating thickness is 0.7 micron. The top coating material is prepared by adding 4 kg of 25% wax emulsion into 100 kg of 20% acrylic acid, adding 0.4 kg of 10% diluted silica, and stirring. The primer coating formula is characterized in that 10 kg of 33 percent waterborne polyurethane is diluted to 5 percent by adding 56 kg of soft water.
The thickness of the bottom coating of the smooth surface coating is 0.3 micron, and the thickness of the top coating is 1.2 micron. Coating and batching on the surface: 100 kg of 50% wax emulsion, 8 kg of 25% wax emulsion, 1 kg of diluted 10% silica, and the mixture was stirred thoroughly. The base coat formula comprises: 10 kg of 55% polyurethane are diluted to 12% with 35.8 kg of ethyl acetate.
The production speed of the coating machine is 200 m/min; the drying temperature of the primary coating is 100-70 ℃, the drying temperature of the top coating is 110-70 ℃, and the aging condition after coating is as follows: at 40 ℃ for 48 hours.
TABLE 1 Performance test results of the ultra-strong wear-resistant cigarette packaging film prepared in example 1
Test method Test results
Wear resistance GB/T31727-2015 HO
Heat seal strength ASTM D 1003 2.95N/15mm
Haze degree ASTM F88 2.1％
Example 2
Coating the 28-micron BOPP single-side heat-sealing film, wherein the bottom coating thickness of the cigarette packet surface coating is 0.15 micron, and the top coating thickness is 0.8 micron. The top coating material is prepared by adding 10 kg of 25% wax emulsion into 200 kg of 20% acrylic acid, adding 0.9 kg of 10% diluted silica, and stirring. In the base coat formula, 20 kg of 33% waterborne polyurethane is diluted to 8.3% by adding 60 kg of soft water.
The thickness of the slip top coat primer is 0.4 microns: the topcoat thickness was 1.3 microns. The top coating material is prepared by adding 20 kg of 25% wax emulsion into 200 kg of 50% PVDC emulsion, adding 2.2 kg of diluted 10% silicon dioxide, and stirring completely. For the primer formulation, 20 kg of 55% polyurethane was diluted to 12.9% with 65 kg of ethyl acetate.
The production speed of the coating machine is 180 m/min; the drying temperature of the primary coating is 90-70 ℃, the drying temperature of the top coating is 100-70 ℃, and the aging condition after coating is as follows: 45 ℃ for 45 hours.
TABLE 2 Performance test results of the ultra-strong wear-resistant cigarette packaging film prepared in example 2
Test method Test results
Wear resistance GB/T31727-2015 HO
Heat seal strength ASTM D 1003 3.23N/15mm
Haze degree ASTM F88 2.3％
Example 3
Coating the BOPP single-side heat-sealing film with the thickness of 22 microns, wherein the bottom coating thickness of the cigarette pack surface coating is 0.1 micron, and the top coating thickness is 0.9 micron. The top coating material is prepared by adding 5 kg of 25% wax emulsion into 100 kg of 25% acrylic acid, adding 0.5 kg of 10% diluted silica, and stirring. The primer coating formula is characterized in that 10 kg of 33 percent waterborne polyurethane is diluted to 5 percent by adding 56 kg of soft water.
The thickness of the slip top coat primer is 0.4 microns: the topcoat thickness was 1.3 microns. The top coating material is prepared by adding 10 kg of wax emulsion with the content of 25% into 100 kg of PVDC emulsion with the content of 50%, then adding 0.9 kg of silicon dioxide diluted to the content of 10%, and fully stirring. For the base coat formulation, 15 kg of 55% polyurethane was diluted to 12.7% with 50 kg of ethyl acetate.
The production speed of the coating machine is 190 m/min; the drying temperature of the primary coating is 95-70 ℃, the drying temperature of the top coating is 105-70 ℃, and the aging condition after coating is as follows: 38 ℃ for 50 hours.
TABLE 3 Performance test results of the ultra-strong wear-resistant cigarette packaging film prepared in example 3
Test method Test results
Wear resistance GB/T31727-2015 HO
Heat seal strength ASTM D 1003 2.85N/15mm
Haze degree ASTM F88 1.9％
Comparative example 1
On the basis of the embodiment 1, a BOPP optical film is adopted to replace a BOPP single-side heat-sealing film to prepare a coating film.
The heat seal strength of the coating film is only 1.02N/15mm, and the packaging requirement cannot be met.
Comparative example 2
Based on example 1, when the solvent type polyurethane was completely replaced with the aqueous polyurethane, the haze of the obtained coating film was 4.8%, and the packaging requirement was not satisfied.
According to the embodiment, the super-strong wear-resistant cigarette packaging film comprises a BOPP single-side heat-sealing film; the solvent type polyurethane adhesive layer and the polyvinylidene chloride layer are sequentially arranged on the heat sealing surface of the BOPP single-side heat sealing film; the polyvinylidene chloride layer is prepared from polyvinylidene chloride with the solid content of 30-50%, wax emulsion with the solid content of 25% and silicon dioxide in a mass ratio of 100 (2-10) to (0.1-1); the waterborne polyurethane adhesive layer and the acrylic acid layer are sequentially arranged on the non-heat-sealing surface of the BOPP single-side heat-sealing film; the preparation raw materials of the acrylic acid layer comprise (by mass ratio) 100 (2-10) acrylic acid with solid content of 15-30%, wax emulsion with solid content of 25% and silicon dioxide with solid content of 0.1-1. According to the invention, the solvent type polyurethane adhesive layer and the polyvinylidene chloride layer are used as the smooth surface of the packaging film, and the water-based polyurethane adhesive layer and the acrylic acid layer are used as the cigarette wrapping surface, so that the packaging film has high wear resistance and heat sealing strength under the combined action; it also has high glossiness. The experimental results show that: the wear resistance of the super-strong wear-resistant cigarette packaging film is HO grade, the heat sealing strength is 2.85-3.23N/15 mm, and the haze is 1.9% -2.3%.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (8)

1. A super wear-resistant cigarette packaging film comprises a BOPP single-side heat-sealing film;
the solvent type polyurethane adhesive layer and the polyvinylidene chloride layer are sequentially arranged on the heat sealing surface of the BOPP single-side heat sealing film; the polyvinylidene chloride layer is prepared from polyvinylidene chloride with the solid content of 30-50%, wax emulsion with the solid content of 25% and silicon dioxide in a mass ratio of 100 (2-10) to (0.1-1);
the waterborne polyurethane adhesive layer and the acrylic acid layer are sequentially arranged on the non-heat-sealing surface of the BOPP single-side heat-sealing film; the preparation raw materials of the acrylic acid layer comprise (by mass ratio) 100 (2-10) acrylic acid with solid content of 15-30%, wax emulsion with solid content of 25% and silicon dioxide with solid content of 0.1-1.
2. The ultra-strong wear-resistant cigarette packaging film as claimed in claim 1, wherein the solvent type polyurethane adhesive layer is prepared by coating solvent type polyurethane, the solid content is 45-75%, and the carrier is ethyl acetate;
the water-based polyurethane adhesive is prepared by coating polyurethane with the solid content of 20-40%.
3. The ultra-strong wear-resistant cigarette packaging film according to claim 1, wherein the wax emulsion with the solid content of 25% comprises palm wax and water.
4. The ultra-strong wear-resistant cigarette packaging film as claimed in claim 1, wherein the silica is natural silica with a particle size of 3-5 microns.
5. The ultra-strong wear-resistant cigarette packaging film as claimed in claim 1, wherein the thickness of the solvent type polyurethane adhesive layer is 0.1-1 micron, and the thickness of the polyvinylidene chloride layer is 0.5-3 micron;
the thickness of the waterborne polyurethane adhesive layer is 0.1-1 micron, and the thickness of the acrylic acid layer is 0.5-2 micron.
6. The ultra-strong wear-resistant cigarette packaging film as claimed in claim 1, wherein the BOPP single-sided heat-sealing film has a thickness of 18-30 microns, a shrinkage rate of 2-10%, a surface tension of a heat-sealing surface of not less than 35 dynes, and a surface tension of a non-heat-sealing surface of not less than 36 dynes.
7. A preparation method of the superstrong wear-resistant cigarette packaging film as defined in any one of claims 1 to 6, comprising the following steps:
coating a primary coating solvent type polyurethane adhesive and a surface coating polyvinylidene chloride emulsion on the heat-sealing surface of the BOPP single-sided heat-sealing film in sequence, and drying;
and then sequentially coating a primary coating waterborne polyurethane adhesive and a surface coating acrylic coating on the non-heat-sealing surface of the BOPP single-side heat-sealing film, and drying to obtain the super-strong wear-resistant cigarette packaging film.
8. The preparation method according to claim 7, wherein the drying temperature is 70-120 ℃;
the coating speed is 80-200 m/min.
CN202110891372.8A 2021-08-04 2021-08-04 Superstrong wear-resistant cigarette packaging film and preparation method thereof Pending CN113583285A (en)

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Application publication date: 20211102