CN108656677B - Smooth laser double-sided heat-sealable cigarette packaging film and preparation method thereof - Google Patents
Smooth laser double-sided heat-sealable cigarette packaging film and preparation method thereof Download PDFInfo
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- CN108656677B CN108656677B CN201810274720.5A CN201810274720A CN108656677B CN 108656677 B CN108656677 B CN 108656677B CN 201810274720 A CN201810274720 A CN 201810274720A CN 108656677 B CN108656677 B CN 108656677B
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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
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/49—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using two or more extruders to feed one die or nozzle
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- 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
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
- B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
- B29C55/14—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial successively
-
- 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
-
- 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
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Wrappers (AREA)
Abstract
The invention discloses a smooth laser double-sided heat-sealable cigarette packaging film and a preparation method thereof. The invention is applied as the cigarette packaging film, which not only increases the laser effect of the cigarette packet external package, but also ensures that the cigarette packaging film has a certain anti-counterfeiting function. 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 high-molecular packaging materials, and particularly relates to a smooth laser double-sided heat-sealable cigarette packaging film 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 role of sealing and moisture prevention. Compared with other products in the packaging industry, the laser packaging material not only has novel and bright appearance effect, improves the appearance grade of the packaged product, but also has high-technology anti-counterfeiting function, so that the application of the laser packaging film is necessary to be increasingly wide in order to improve the product competitiveness. However, the existing laser packaging film has many problems, for example, the laser printed pattern is not clear and is easy to fall off, after laser printing, the heat sealing performance is reduced or a heat sealing coating needs to be added, 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 smooth laser double-sided heat-sealable cigarette packaging film and a preparation method thereof.
Disclosure of Invention
The invention aims to provide a smooth laser double-sided heat-sealable cigarette packaging film and a preparation method thereof.
The first purpose of the invention is realized by adopting a double-sided heat-sealable smooth laser BOPP base material film as the smooth laser double-sided heat-sealable cigarette packaging film and carrying out laser imprinting on the inner layer.
The second object of the present invention is achieved by comprising the steps of:
A. two-sided heat-sealable plain laser BOPP substrate film: the polypropylene is prepared by adopting a multi-layer co-extrusion polypropylene biaxial stretching preparation process and polypropylene raw materials, 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: firstly, carrying out surface treatment on the inner layer of the double-sided heat-sealable smooth-surface laser BOPP substrate film obtained in the step A, wherein the treatment intensity of the inner layer is 40-45 dyn; and then, stamping a laser pattern on the inner layer of the base material film by adopting a laser mould pressing process.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention creatively provides a smooth laser double-sided heat-sealable cigarette packaging film, which performs laser stamping on an inner layer and keeps the heat-sealing performance of the inner layer.
2. 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.
3. According to the invention, through a scientific material formula and a preparation process, the laser layer of the packaging film has good adhesion, and the phenomena of falling-off of laser patterns and the like are avoided.
4. The packaging film is designed by adopting a special material formula, so that the obtained packaging film has laser and heat-sealing performances; the structure form is as follows: the multilayer structure of the heat sealing layer, the core layer and the laser heat sealing layer can be widely applied.
5. According to the invention, through the screening optimization of the formula of the double-sided heat-sealable smooth-surface laser BOPP substrate film with the three-layer structure, the stability of the performance of the substrate film in the post-processing process is well solved, and the stability of the performance of the substrate in the processing process comprising the processes of substrate processing, laser imprinting, cigarette machine use and the like is realized, so that the stable production of products is realized.
6. The invention needs laser imprinting, has high requirements on the selection of the raw material of the inner layer (B layer) of the base material and the surface adhesive force, 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 44dyn, and the adhesive force of the laser pattern 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 smooth laser double-sided heat-sealable cigarette packaging film is obtained by performing laser imprinting on an inner layer by adopting a double-sided heat-sealable smooth laser BOPP base material film.
The laser embossing method is characterized in that before laser embossing, surface treatment is carried out on the inner layer of the double-sided heat-sealable smooth laser BOPP substrate film, wherein the surface treatment is one or more of corona treatment, flame treatment and chemical polarity treatment. Preferably corona treatment.
The double-sided 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 any one of a binary copolymer X, a binary copolymer Y and a binary copolymer Z, and the terpolymer is any one of a ternary copolymer X, a ternary copolymer Y and a ternary copolymer Z; the melt mass flow rate MFR =4.90-5.42g/10min for bipolymer X, the melt mass flow rate MFR =5.40-5.80g/10min for bipolymer Y, and the melt mass flow rate MFR =5.83-6.1g/10min for bipolymer Z; the melt mass flow rate MFR =5.5-5.90g/10min for the terpolymer X, the melt mass flow rate MFR =5.91-6.5g/10min for the terpolymer Y, and the melt mass flow rate MFR =6.51-7.20g/10min for the terpolymer Z.
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 obtained by transferring a holographic image with rainbow dynamic and three-dimensional effects to the inner layer of the double-sided heat-sealable smooth laser BOPP substrate film through mould pressing by adopting a 3D true color holographic technology and a multiple and dynamic imaging technology.
The film thickness of the smooth laser double-sided heat-sealable cigarette packaging film is 18-23 microns, the thickness of the outer layer is 0.4-2.0 microns, and the thickness of the inner layer is 0.8-2.0 microns.
The preparation method of the smooth laser double-sided heat-sealable cigarette packaging film comprises the following steps:
A. two-sided heat-sealable plain laser BOPP substrate film: the polypropylene is prepared by adopting a multi-layer co-extrusion polypropylene biaxial stretching preparation process and polypropylene raw materials, 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: firstly, carrying out surface treatment on the inner layer of the double-sided heat-sealable smooth-surface laser BOPP substrate film obtained in the step A, wherein the treatment intensity of the inner layer is 40-45 dyn; and then, stamping a laser pattern on the inner layer 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, unreeling, preheating, molding, cooling and reeling.
The embodiment of the double-sided heat-sealable smooth laser BOPP substrate film disclosed by the invention is as follows:
note: -copolymers, terpolymers, polybutene having a total comonomer content X > Y > Z.
Example 10
Laser stamping is carried out on the laser packaging base material film obtained in the embodiment 1 to obtain a smooth laser double-sided heat-sealable cigarette packaging film, and the preparation method comprises the following steps:
A. preparing a laser packaging base material film: the polypropylene composite material is prepared by adopting a multi-layer co-extrusion polypropylene biaxial stretching preparation process, wherein the longitudinal stretching temperature is 60 ℃, the transverse stretching temperature is 100 ℃, the temperature of an extruder is 200 ℃, and the stretching ratio is 4;
B. laser stamping: the processing is carried out by a laser mould pressing process, and the mould pressing temperature is 170 ℃.
The packaging film for the smooth-surface laser double-sided heat-sealable cigarette prepared by the embodiment has the water vapor transmission rate =7 g/m2Day, oxygen transmission rate =1700 cc/m2Day; the initial heat sealing temperature (inside to outside) is 82 ℃, so that the composite packaging film has good heat sealing performance, and better solves the problem of heat sealing performance after laser stamping.
Example 11
Laser embossing processing is carried out on the laser packaging base material film obtained in the embodiment 2 to obtain a smooth laser double-sided heat-sealable cigarette packaging film, and the preparation method comprises the following steps:
A. preparing a laser packaging base material film: the polypropylene composite material is prepared by adopting a multi-layer co-extrusion polypropylene biaxial stretching preparation 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;
B. laser embossing process: firstly, carrying out surface treatment on the inner layer of the double-sided heat-sealable smooth-surface laser BOPP substrate film obtained in the step A, wherein the inner layer treatment strength is 40 dyn; then, stamping a laser pattern on the inner layer 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; the molding temperature was 175 ℃.
The packaging film for the smooth-surface laser double-sided heat-sealable cigarette prepared by the embodiment has the water vapor transmission rate =6 g/m2Day, the initial heat seal temperature (inside to outside) is 84 ℃, so the packaging film of the invention has good heat seal performance, and effectively solves the problem of reduced heat seal performance after laser stamping.
Example 12
The laser packaging base material film obtained in the embodiment 5 is subjected to laser embossing processing to obtain a laser double-sided heat-sealable cigarette packaging film, and the preparation method comprises the following steps:
A. preparing a laser packaging base material film: the polypropylene composite material is prepared by adopting a multi-layer co-extrusion polypropylene biaxial stretching preparation 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;
B. laser embossing process: firstly, carrying out surface treatment on the inner layer of the double-sided heat-sealable smooth-surface laser BOPP substrate film obtained in the step A, wherein the treatment strength of the inner layer is 45 dyn; then, stamping a laser pattern on the inner layer 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, unreeling, preheating, molding, cooling and reeling. Laser stamping: the molding temperature was 180 ℃.
The laser double-sided heat-sealable cigarette packaging film prepared in the embodiment has the water vapor transmission rate =7 g/m2Day, the initial heat sealing temperature (inside to outside) is 85 ℃, so the composite packaging film of the invention has good heat sealing performance, and effectively solves the problem of reduced heat sealing performance after laser imprinting.
Claims (5)
1. A smooth laser double-sided heat-sealable cigarette packaging film is characterized in that the smooth laser double-sided heat-sealable cigarette packaging film is obtained by laser imprinting an inner layer by adopting a double-sided heat-sealable smooth laser BOPP (biaxially-oriented polypropylene) base material film; the double-sided heat-sealable smooth-surface 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 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 X, a binary copolymer Y or a binary copolymer Z, and the terpolymer is a terpolymer X, a terpolymer Y or a terpolymer Z; melt mass flow rate MFR =4.90-5.42g/10min for bipolymer X, melt mass flow rate MFR =5.40-5.80g/10min for bipolymer Y, melt mass flow rate MFR =5.83-6.1g/10min for bipolymer Z; the melt mass flow rate MFR =5.5-5.90g/10min for terpolymer X, 5.91-6.5g/10min for terpolymer Y, 6.51-7.20g/10min for terpolymer Z; the master batch contained in the core layer 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.
2. The smooth laser double-sided heat-sealable cigarette packaging film of claim 1, wherein the laser embossing is preceded by a surface treatment of the inner layer of the double-sided heat-sealable smooth laser BOPP substrate film, the surface treatment being one or more of corona treatment, flame treatment, and chemical polarity treatment.
3. The smooth laser double-sided heat-sealable cigarette packaging film of claim 1, wherein the laser embossing is obtained by transferring a holographic image with rainbow dynamic and three-dimensional stereoscopic effects to the inner layer of the double-sided heat-sealable smooth laser BOPP substrate film by mold pressing by using a 3D true color holographic technique, a multiplex and dynamic imaging technique.
4. The smooth laser double-sided heat-sealable cigarette packaging film of claim 1, wherein the film thickness of the smooth laser double-sided heat-sealable cigarette packaging film is 18-23 microns, the thickness of the outer layer is 0.4-2.0 microns, and the thickness of the inner layer is 0.8-2.0 microns.
5. The preparation method of the smooth laser double-sided heat-sealable cigarette packaging film according to claim 1, characterized by comprising the following steps:
A. two-sided heat-sealable plain laser BOPP substrate film: the polypropylene is prepared by adopting a multi-layer co-extrusion polypropylene biaxial stretching preparation process and polypropylene raw materials, 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: firstly, carrying out surface treatment on the inner layer of the double-sided heat-sealable smooth-surface laser BOPP substrate film obtained in the step A, wherein the treatment intensity of the inner layer is 40-45 dyn; and then, stamping a laser pattern on the inner layer of the base material film by adopting a laser mould pressing process.
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| CN201810274720.5A CN108656677B (en) | 2018-03-30 | 2018-03-30 | Smooth laser double-sided heat-sealable cigarette packaging film and preparation method thereof |
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| CN108656677B true CN108656677B (en) | 2020-06-05 |
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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 |
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| CN107804039A (en) * | 2017-10-30 | 2018-03-16 | 云南昆岭薄膜工业有限公司 | One kind, which is aluminized, prints cigarette composite package film and preparation method thereof |
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2018
- 2018-03-30 CN CN201810274720.5A patent/CN108656677B/en active Active
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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 |
| CN1746022A (en) * | 2005-04-22 | 2006-03-15 | 普宁市威孚包装材料有限公司 | Radiant vacuum aluminium-jetting transferring base membrane |
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| DE102007059189A1 (en) * | 2007-12-06 | 2009-06-10 | Wipak Walsrode Gmbh & Co. Kg | Resealable packaging |
| CN103753921A (en) * | 2014-01-17 | 2014-04-30 | 云南昆岭薄膜工业有限公司 | Cigarette logo permeable printing packaging film for replacing cigarette paper carton and preparation method of packaging film |
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