CN114000109B - Preparation method of inflatable high-barrier aluminized VMCPP film - Google Patents
Preparation method of inflatable high-barrier aluminized VMCPP film Download PDFInfo
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- CN114000109B CN114000109B CN202111294665.4A CN202111294665A CN114000109B CN 114000109 B CN114000109 B CN 114000109B CN 202111294665 A CN202111294665 A CN 202111294665A CN 114000109 B CN114000109 B CN 114000109B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000004743 Polypropylene Substances 0.000 claims abstract description 32
- -1 polypropylene Polymers 0.000 claims abstract description 32
- 229920001155 polypropylene Polymers 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 28
- 229920002725 thermoplastic elastomer Polymers 0.000 claims abstract description 22
- 239000010410 layer Substances 0.000 claims abstract description 20
- 230000004888 barrier function Effects 0.000 claims abstract description 19
- 239000008187 granular material Substances 0.000 claims abstract description 13
- 239000012793 heat-sealing layer Substances 0.000 claims abstract description 7
- 239000011248 coating agent Substances 0.000 claims description 33
- 238000000576 coating method Methods 0.000 claims description 33
- 230000032683 aging Effects 0.000 claims description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 15
- 229910052782 aluminium Inorganic materials 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 14
- 238000007774 anilox coating Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 8
- 238000007738 vacuum evaporation Methods 0.000 claims description 8
- 238000007740 vapor deposition Methods 0.000 claims description 7
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 6
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 6
- 238000001704 evaporation Methods 0.000 claims description 5
- 230000008020 evaporation Effects 0.000 claims description 5
- 238000005269 aluminizing Methods 0.000 claims description 4
- 239000011247 coating layer Substances 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 238000006116 polymerization reaction Methods 0.000 claims description 2
- 238000000151 deposition Methods 0.000 claims 1
- 230000008021 deposition Effects 0.000 claims 1
- 238000004806 packaging method and process Methods 0.000 abstract description 13
- 239000008188 pellet Substances 0.000 abstract description 4
- 238000005266 casting Methods 0.000 abstract description 3
- 229920006027 ternary co-polymer Polymers 0.000 abstract description 2
- 239000005025 cast polypropylene Substances 0.000 description 21
- 238000007789 sealing Methods 0.000 description 10
- 238000003851 corona treatment Methods 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 230000000704 physical effect Effects 0.000 description 4
- 239000012792 core layer Substances 0.000 description 3
- 235000013305 food Nutrition 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 239000002985 plastic film Substances 0.000 description 3
- 229920006255 plastic film Polymers 0.000 description 3
- 239000002987 primer (paints) Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229920006378 biaxially oriented polypropylene Polymers 0.000 description 2
- 239000011127 biaxially oriented polypropylene Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
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- 238000011056 performance test Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
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- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
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- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
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- 238000007747 plating Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
-
- 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
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/14—Copolymers of propene
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
- C23C14/20—Metallic material, boron or silicon on organic substrates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/04—Thermoplastic elastomer
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Laminated Bodies (AREA)
- Wrappers (AREA)
Abstract
The application provides a preparation method of an inflatable high-barrier aluminized VMCPP film, and provides a method of the inflatable high-barrier aluminized VMCPP film, wherein middle sea shell HP510M is selected as a core polypropylene granule of the inflatable high-barrier aluminized VMCPP film, and a thermoplastic elastomer 6202 is added, wherein the mass fraction of the thermoplastic elastomer 6202 is 5%. The heat-sealing layer of the inflatable high-barrier polypropylene aluminized film uses ternary copolymer polypropylene granules FL7642 of Singapore TPC and is added with a thermoplastic elastomer 3980, wherein the mass fraction of the thermoplastic elastomer 3980 is 15%. The corona layer of the inflatable high barrier polypropylene aluminized film uses polypropylene pellets FL7322 of singapore TPC. The preparation method provided by the application can solve the problems that the existing casting polypropylene film is easy to leak air and poor in barrier property when being used for gas packaging.
Description
Technical Field
The application relates to the field of aluminized films, in particular to a preparation method of an inflatable high-barrier aluminized VMCPP film.
Background
With the improvement of the living standard of people, the commodity is gradually developed to be high-grade and diversified, and the product outer package is also advancing to be high-grade and differentiated as an important carrier for transmitting product information and brand image. Along with the continuous improvement of the quality requirements of the packaging materials in the market, the requirements of the appearance brightness and the aluminum layer fastness of the coating film are also continuously improved.
The aluminizer is a composite flexible packaging material formed by plating a layer of extremely thin metal aluminum on the surface of a plastic film by adopting a special process. That is, metallic aluminum is melted and evaporated at a high temperature in a high vacuum state, and vapor deposition of aluminum is deposited on the surface of the plastic film, thereby giving the surface of the plastic film metallic luster. The aluminized cast polypropylene film is one of films with more applications, has light shielding, ultraviolet irradiation prevention and good barrier performance, is a packaging material with low cost, attractive appearance, excellent performance and strong practicability, and is widely applied to daily chemical product packaging, food packaging and packaging of some medicines.
Cast polypropylene films (CPPs) are multilayer coextruded films made from polypropylene particles by melt coextrusion casting to form films. Because of the good physical stability, mechanical strength and heat sealing, the film is widely used for packaging food and medicines at present. The barrier property of the cast polypropylene film (CPP) can be improved after the surface is plated with a layer of aluminum, but when the common cast polypropylene aluminized film is used for packaging products with higher requirements, the heat sealing air tightness, water and oxygen insulation performance of the common cast polypropylene aluminized film can not meet the requirements, and the application of the common cast polypropylene aluminized film in the aspect is limited.
Disclosure of Invention
The embodiment of the application provides a preparation method of an inflatable high-barrier aluminized VMCPP film, so as to improve the technical problems.
The application provides a method for an inflatable high-barrier aluminized VMCPP film, wherein middle sea shell HP510M is selected as a core polypropylene granule of the inflatable high-barrier aluminized VMCPP film, and a thermoplastic elastomer 6202 is added, wherein the mass fraction of the thermoplastic elastomer 6202 is 5%. The heat-sealing layer of the inflatable high-barrier polypropylene aluminized film uses ternary copolymer polypropylene granules FL7642 of Singapore TPC and is added with a thermoplastic elastomer 3980, wherein the mass fraction of the thermoplastic elastomer 3980 is 15%. The corona layer of the inflatable high barrier polypropylene aluminized film uses polypropylene pellets FL7322 of singapore TPC. The 5% thermoplastic elastomer is added through the core layer to improve the tensile strength and the breaking elongation of the film, so that the bag is prevented from being broken due to expansion and stretching when the packaging bag made of the film is inflated and packaged. The heat sealing layer is added with 15% of another brand of thermoplastic elastomer to prevent the air leakage and the air leakage of the sealing of the bag. The corona treatment layer has the properties of slow decay of corona value and high adhesive force after corona treatment through the selected polypropylene FL7322 granules.
In some embodiments, the inflatable high barrier aluminized VMCPP film is aluminized using a vacuum evaporation process, the evaporation boat preheating temperature is 1100 ℃, and the vacuum is 2.8X10 -4 The OD value is 2.4, the wire feeding speed of the aluminum wire in the technical process is 1200mm/min, the vapor deposition speed of the inflatable high-barrier aluminized VMCPP film is 400m/min, and the optical density of the aluminum layer is 2.4.
In some embodiments, before the vapor deposition of the aluminum layer on the inflatable high barrier aluminum-plated VMCPP film using the vacuum evaporation process, further comprising:
the inflatable high-barrier aluminized VMCPP film is coated with a high-barrier coating layer by roller in a coating machine, wherein the high-barrier coating layer is polyvinyl alcohol (PVA), the coating material is 7503 which is commercially available, the mesh number of a coating anilox roller is 200 meshes, and then the coating material is dried and wound. The drying can fully avoid the problem of larger internal stress of the base coat caused by severe temperature change, improve the adhesive strength between the base coat and the base material of the cast polypropylene film, and avoid the problem of film breakage of the unreeled film. And simultaneously, the coating on the anilox roller is transferred to the surface corona layer of the film, so that the coating of the bottom coating on the surface of the cast polypropylene film is realized.
In some embodiments, prior to roll coating the inflatable high barrier aluminized VMCPP film with the high barrier coating, further comprising: and (3) rolling the inflatable high-barrier polypropylene aluminized film, and then performing aging treatment for more than 48 hours at normal temperature. And (5) casting a polypropylene film heat sealing layer.
In some embodiments, the resulting cast polypropylene film is subjected to an aging treatment for 48 hours at ambient temperature to facilitate stabilization of the physical properties of the film.
In some embodiments, after roll coating the inflatable high barrier aluminized VMCPP film with the high barrier coating, further comprising: and (3) rolling the inflatable high-barrier polypropylene aluminized film, and then performing aging treatment for more than 48 hours at normal temperature. The aging treatment is beneficial to improving the shape and dimensional stability of the film.
In some embodiments, after the vapor deposition of the aluminum layer on the inflatable high barrier aluminum-plated VMCPP film using a vacuum evaporation process, further comprising: and (3) aging the inflatable high-barrier aluminized VMCPP film for 48 hours at normal temperature.
In some embodiments, after the vapor deposition of the aluminum layer on the inflatable high barrier aluminum-plated VMCPP film using a vacuum evaporation process, further comprising: and cutting the inflatable high-barrier aluminized VMCPP film.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a comparative chart of the physical properties of two cast polypropylene films mentioned in this application;
FIG. 2 is a chart showing the physical properties of an inflatable high barrier aluminized film according to the present invention;
FIG. 3 is a graph showing the results of the sealing performance test of the air-packing bag proposed in the present application.
Detailed Description
In order to enable those skilled in the art to better understand the present application, the following description will make clear and complete descriptions of the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, based on the embodiments herein, which are within the scope of the protection of the present application, will be within the skill of the art without undue effort.
In this application, the terms "mounted," "connected," "secured," and the like are to be construed broadly unless otherwise specifically indicated or defined. For example, the connection can be fixed connection, detachable connection or integral connection; can be mechanically or electrically connected; the connection may be direct, indirect, or internal, or may be surface contact only, or may be surface contact via an intermediate medium. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for understanding as a specific or particular structure. The description of the terms "some embodiments," "other embodiments," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this application, the schematic representations of the above terms are not necessarily for the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described herein, as well as features of various embodiments or examples, may be combined and combined by those skilled in the art without conflict.
The application provides a preparation method of an inflatable high-barrier aluminized VMCPP film, which can solve the problems that the existing cast polypropylene film is easy to leak air and poor in barrier property when being used for air-packing.
As one embodiment, the core layer may be selected from the group consisting of the middle sea shell homopolypropylene pellets HP510M and the thermoplastic elastomer 6202, wherein the mass fraction of the thermoplastic elastomer 6202 is about 5% when producing the cast polypropylene film. And simultaneously, uniformly stirring the polypropylene granules and the thermoplastic elastomer by using a stirrer, and sucking the mixture into an extruder by using a sucking machine for heating, melting and extruding. The core layer is added with 5% of thermoplastic elastomer to improve the tensile strength and elongation at break of the film, so as to avoid the bag from being broken due to expansion and stretching when the packaging bag made of the film is inflated and packaged.
In some embodiments, the surface heat-sealing layer can be made of ternary polymerization polypropylene granules FL7642 of Singapore TPC, and 15% of another brand thermoplastic elastomer 3980 is added, and after the polypropylene granules and the thermoplastic elastomer are stirred uniformly by a stirrer, the polypropylene granules and the thermoplastic elastomer are washed by an aspirator to an extruder to be heated, melted and extruded. The heat sealing layer is added with 15% of another brand of thermoplastic elastomer to prevent the air leakage and the air leakage of the sealing of the bag.
In some embodiments, the surface corona treatment layer is selected from polypropylene granules FL7322 of Singapore TPC when producing cast polypropylene film, and the polypropylene granules are washed to an extruder by an aspirator to be heated, melted and extruded. The polypropylene FL7322 pellet selected for the corona treatment layer has the properties of slow attenuation of corona value and high adhesive force after corona treatment.
As in the prior art, the plastic melt is formed by cooling in a main chill roll. As one embodiment, the thickness can be measured on-line after the film is formed, and the thickness is controlled to 25um. The film was then corona treated on-line with a corona power of 16Kw. The film is drawn and wound up after corona treatment. Aging treatment is carried out for more than 48 hours, and the temperature is normal temperature. As one embodiment, the film is aged for 55 hours at 30 ℃. Referring to fig. 1, the aging-treated film sample is compared with a common cast polypropylene film for detection, and the physical properties of the improved cast polypropylene film are greatly improved compared with those of the common cast polypropylene film.
And (3) coating a bottom coating on the surface of the cast polypropylene film. The roll coating speed was 60m/min, i.e. the film movement speed was 60m/min. The coating is polyvinyl alcohol (PVA), the coating is a double-component, and the component A is as follows: the mixing proportion of the component B is 2:1, the coating is commercially available existing coating 7503, and the mesh number of the coated anilox roller is 200 mesh. In the implementation process, the primer coating can be placed into a container, the coating is adhered to the surface of the anilox roller in the process of coating the anilox roller, a film passes through between the anilox roller and the compression roller, and the coating on the anilox roller is transferred to the surface corona layer of the film, so that the coating of the primer coating on the surface of the cast polypropylene film is realized.
As one embodiment, the film is dried immediately after the primer coating is applied by roll coating, the drying is accomplished by four ovens each having a length of 6m, the drying oven temperatures are 70 ℃, 80 ℃, 70 ℃ and the drying blower frequency is 35Hz. The drying can fully avoid the problem of larger internal stress of the base coat caused by severe temperature change, improve the adhesive strength between the base coat and the base material of the cast polypropylene film, and avoid the problem of film breakage of the unreeled film.
And (3) rolling the film processed in the step (S10), wherein the rolling tension is 12N. The winding tension must be moderate to avoid the damage to the coating caused by the stretching of the film due to the overlarge tension.
In some embodiments, the winding is followed by an aging treatment for 48 hours at ambient temperature. The aging treatment is beneficial to improving the shape and dimensional stability of the film.
And (3) carrying out surface tension detection on the coated surface of the polypropylene film subjected to ageing treatment after coating according to GB/T14216-2008, wherein the surface tension value is 50 dyne value, and the adhesive force of the aluminum layer subjected to vacuum aluminizing in the next process is not affected.
And (3) adopting a vacuum evaporation process to evaporate the aluminum film on the treated polypropylene film. As one embodiment, the preheating temperature of the evaporation boat is 1100 ℃, and the vacuum degree is 2.8X10 -4 The OD is 2.4 in MPa. The wire feeding speed of the aluminum wire is 1200mm/min. The vapor deposition speed of the biaxially oriented polypropylene film is 400m/min. As an implementation mode, the biaxially oriented polypropylene film can be rolled later, and ageing treatment is carried out after the rolling. The winding tension is 150N; the aging treatment time is 48h, and the aging treatment temperature is normal temperature. And (3) slitting the film processed in the step (S14), wherein the slitting rolling tension is required to be moderate, so that the tensile damage to the protective coating is avoided. The preparation method of the inflatable high-barrier aluminized VMCPP film can be obtained through the steps. After slitting, the product is sampled and detected, and the sampling result is shown in fig. 3.
In one embodiment, to verify that the films prepared by the above method can be used for packaging foods by air inflation, the sealing performance of the packaging bags prepared by the films is also tested.
And (3) preparing the treated film into a packaging bag by using a bag making machine, filling a certain amount of nitrogen during bag making, sealing the four sides at the temperature of 120 ℃, and performing heat sealing on the four sides to prepare 50 inflatable packaging bags. And the sealing performance test is carried out on all 50 inflatable packaging bags by using a sealing instrument. Test results referring to fig. 3, the test results show that 50 packages all have excellent heat seal air tightness, pressure resistance and high barrier property. Therefore, the preparation method can solve the problems of easy air leakage, air leakage and poor barrier property of the traditional cast polypropylene thin aluminized film when the film is used for air-packing.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present application, and are intended to be included within the scope of the present application.
Claims (6)
1. The preparation method of the inflatable high-barrier aluminized VMCPP film is characterized by comprising the following steps of: the core polypropylene granules of the inflatable high-barrier aluminized VMCPP film are made of middle sea shell HP510M, and a thermoplastic elastomer 6202 is added, wherein the mass fraction of the thermoplastic elastomer 6202 is 5%; the heat sealing layer of the inflatable high-barrier polypropylene aluminized film is prepared by selecting a ternary polymerization polypropylene particle FL7642 of Singapore TPC and adding a thermoplastic elastomer 3980, wherein the mass fraction of the thermoplastic elastomer 3980 is 15%; the corona layer of the inflatable high-barrier polypropylene aluminized film uses polypropylene granules FL7322 of Singapore TPC, the preheating temperature of an evaporation boat is 1100 ℃, and the vacuum degree is 2.8X10 -4 The OD value is 2.4, the wire feeding speed of the aluminum wire in the technical process is 1200mm/min, the vapor deposition speed of the inflatable high-barrier aluminized VMCPP film is 400m/min, and the optical density of the aluminum layer is 2.4.
2. The method for preparing the inflatable high-barrier aluminized VMCPP film according to claim 1, which is characterized in that:
before the inflatable high-barrier aluminized VMCPP film is subjected to aluminizing layer deposition by adopting a vacuum evaporation process, the method further comprises the following steps:
the inflatable high-barrier aluminized VMCPP film is coated with a high-barrier coating layer by roller in a coating machine, wherein the high-barrier coating layer is polyvinyl alcohol (PVA), the coating material is 7503 which is commercially available, the mesh number of a coating anilox roller is 200 meshes, and then the coating material is dried and rolled.
3. The method for preparing the inflatable high-barrier aluminized VMCPP film according to claim 1,
the method is characterized in that:
before the inflatable high-barrier aluminized VMCPP film is coated with the high-barrier coating by roller, the method further comprises:
and (3) rolling the inflatable high-barrier polypropylene aluminized film, and then performing aging treatment for more than 48 hours at normal temperature.
4. The method for preparing the inflatable high-barrier aluminized VMCPP film according to claim 1, which is characterized in that:
after roll-coating the inflatable high barrier aluminized VMCPP film with a high barrier coating, the method further comprises:
and (3) rolling the inflatable high-barrier polypropylene aluminized film, and then performing aging treatment for more than 48 hours at normal temperature.
5. The method for preparing the inflatable high-barrier aluminized VMCPP film according to claim 1, which is characterized in that:
after the inflatable high-barrier aluminized VMCPP film is subjected to aluminizing layer evaporation by adopting a vacuum evaporation process, the method further comprises the following steps:
and (3) aging the inflatable high-barrier aluminized VMCPP film for 48 hours at normal temperature.
6. The method for preparing the inflatable high-barrier aluminized VMCPP film according to claim 5, which is characterized in that:
after the inflatable high-barrier aluminized VMCPP film is subjected to aluminizing layer evaporation by adopting a vacuum evaporation process, the method further comprises the following steps:
and cutting the inflatable high-barrier aluminized VMCPP film.
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