CN107415381A - A kind of high-barrier VMCPP films and its production technology - Google Patents

A kind of high-barrier VMCPP films and its production technology Download PDF

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CN107415381A
CN107415381A CN201710219402.4A CN201710219402A CN107415381A CN 107415381 A CN107415381 A CN 107415381A CN 201710219402 A CN201710219402 A CN 201710219402A CN 107415381 A CN107415381 A CN 107415381A
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films
layer
vmcpp
barrier
polypropylene material
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CN107415381B (en
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鲍祖本
汪学文
吴旭峰
张和平
王健
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Huangshan Novel Co Ltd
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Huangshan Novel Co Ltd
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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
    • B32B27/08—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 of synthetic resin
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • C23C14/32—Vacuum evaporation by explosion; by evaporation and subsequent ionisation of the vapours, e.g. ion-plating
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B32B2250/242—All polymers belonging to those covered by group B32B27/32
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • B32B2255/205—Metallic coating
    • 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
    • B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
    • 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
    • B32B2307/54—Yield strength; Tensile strength
    • 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
    • B32B2307/558—Impact strength, toughness
    • 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
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7244—Oxygen barrier
    • 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
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)

Abstract

The present invention relates to a kind of high-barrier VMCPP films and its production technology.The film includes being combined with each other successively and Thickness ratio is (2.8~3.2):(20.5~21.5):(5.7~6.3) aluminium coated, sandwich layer, hot sealing layer；Aluminium coated is (65~69) including mass ratio:The atactic copolymerized polypropene and cyclenes copolymer of (31~35)；Sandwich layer includes the HOPP containing nucleator；Hot sealing layer is (1~3) including mass ratio:(49~51):Opening agent, ternary polymerized polypropylene material one, the ternary polymerized polypropylene material two of (47~49)；The ternary polymerized polypropylene material one, which melts, refers to 8g/10min, and the ternary polymerized polypropylene material two, which melts, refers to 7g/10min.The present invention has the barrier property for being significantly higher than conventional obstructive film, and the oxygen transmission rate ORT values of its composite package film product formed as base material are lower compared to traditional barrier film.

Description

A kind of high-barrier VMCPP films and its production technology
Technical field
The invention belongs to thin film fabrication techniques field, is specifically related to a kind of high-barrier VMCPP films and its production technology.
Background technology
Existing composite package film is mainly the barrier layer be used as base material by VMPET or aluminium foil and form composite package film, But in the case where packing larger frictional force effect, microcosmic drawing crack deformation occurs in composite package film, and barrier can passes through Microcosmic deformation and produce significant impact, as VMPET, aluminium foil hallrcuts can all make the moisture-inhibiting of composite package film, oxygen flow ginseng It is high several litres.
VMCPP films are a kind of composite packaging membrane materials with barrier and heat sealable dual-use function, but are actually made Used time, because the influence of formula design and processes control, the VMCPP films of production are poor to the stability of oxygen obstruction.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention provides a kind of high-barrier VMCPP films and its production technology.
In order to realize the purpose of the present invention, present invention employs following technical scheme：
A kind of high-barrier VMCPP films, the film includes aluminium coated, sandwich layer, the hot sealing layer being combined with each other successively, described Aluminium coated, sandwich layer, the Thickness ratio of hot sealing layer are (2.8~3.2):(20.5~21.5):(5.7~6.3)；The aluminium coated includes Atactic copolymerized polypropene and cyclenes copolymer, the mass ratio of the atactic copolymerized polypropene and cyclenes copolymer is (65~69): (31~35)；The sandwich layer includes the HOPP containing nucleator；The hot sealing layer includes opening agent, ternary polymerization poly- third Alkene material one, ternary polymerized polypropylene material two, the opening agent, ternary polymerized polypropylene material one, ternary polymerized polypropylene material two Mass ratio is (1~3):(49~51):(47~49)；The ternary polymerized polypropylene material one, which melts, refers to 8g/10min, the ternary COPP material two, which melts, refers to 7g/10min.
Optimal technical scheme, the aluminium coated, sandwich layer, the Thickness ratio of hot sealing layer are 3:21:6.
Further technical scheme, the sandwich layer are made up of first layer and the second layer, and the first layer and aluminium coated are compound, institute State that the second layer is compound with hot sealing layer, the Thickness ratio of the first layer and the second layer is 18.5:2.5.
Optimal technical scheme, atactic copolymerized polypropene and the cyclenes copolymer mass ratio of the sandwich layer are 67:33.
Optimal technical scheme, opening agent, ternary polymerized polypropylene material one, the ternary polymerized polypropylene material two of the hot sealing layer Mass ratio be 2:50:48.
Optimal technical scheme, the atactic copolymerized polypropene are the production that the trade mark of Borouge chemical company production is RD265CF Product；The cyclenes copolymer is the product that the trade mark of Polyplastics company production is 8007F-500；The HOPP be for The product that the trade mark of Borouge chemical company production is HD915CF；The opening agent is that the trade mark of precious Leadd B.V's production is ABPP10S product；The ternary polymerized polypropylene material one be Yanshan Petrochemical company production the trade mark be C5908 product, institute State ternary polymerized polypropylene material two be Hu Shi chemical companies production the trade mark be SFC750M product.
Optimal technical scheme, the OD values of aluminizing of the film are 2.7.
A kind of production technology of high-barrier VMCPP films, includes the process of aluminizing of CPP films, CPP in the process of aluminizing The unwinding tension of film is 180~200N, and winding tension is 150~170N, and the rewind slitting tension force of obtained VMCPP films is 170~190N.
The beneficial effects of the present invention are：
(1) VMCPP films of the present invention have high obstructing performance, the oxygen flow of its composite package film product formed as base material Rate ORT values are lower compared to traditional barrier film.Cyclenes copolymer make it that VMCPP Film stiffness is high, in the wrong in the aluminium coated It is high to take intensity height, Young's modulus；Furthermore such that aluminium coated has good adhesive force to aluminium, it can improve and keep the table of film Face tension value so that aluminium atom steam is evenly distributed densification in film surface in process of aluminizing, so as to further improve film High obstructing performance.The HOPP of the sandwich layer can aid in improving the yield strength of film, and wherein nucleator can carry The crystallinity of high HOPP causes the tensile resistance of film to strengthen, effectively prevent film because of tensile deformation and caused by The reduction of thin-film barrier performance.
The selection of each type of feed in aluminium coated, sandwich layer, hot sealing layer in VMCPP films of the present invention, raw material proportioning and each Difference in thickness between layer, it is the pith for ensureing VMCPP film high obstructing performances.VMCPP films of the present invention can To be compounded to form the composite package film product with high obstructing performance with PET film or BOPP film.
(2) optimal technical scheme provided by the invention can cause the barrier property of VMCPP films to reach optimum state, and Cost minimization.
(3) the advantages of sandwich layer is divided into two layers is：Flexible thickness structure design can be carried out, decomposes the thickness of sandwich layer Degree, can do aluminium coated thinner, reduce the thickness difference of aluminium coated and sandwich layer, beneficial to the high barrier for improving VMCPP films Energy.
(4) in the process of aluminizing of the production technology of VMCPP films of the present invention, unwinding tension should compared with winding tension more greatly, The control of unwinding tension can avoid film from plating ceases to be busy occur so that and film is aluminized uniformly, the barrier property of effective enhanced film, The control of winding tension can avoid film from being stretched deformation；The control of rewind slitting tension force be also avoid it is thin in rewind slitting Stretcher strain occurs for film, because destruction of the stretching to thin-film barrier performance is it will be apparent that so the present invention passes through to producing work The control of skill condition can effectively strengthen the barrier property of VMCPP films and avoid VMCPP thin-film barrier performances from being destroyed.
Brief description of the drawings
Fig. 1 is that light is done to VMCPP films of the present invention through the figure obtained by test；
Fig. 2 is that light is done to conventional obstructive film through the figure obtained by test.
Fig. 3 is the production technological process of cast polypropylene film.
Fig. 4 is the aluminum plating process flow chart of cast polypropylene film.
Embodiment
More specific detail is made to technical solution of the present invention with reference to embodiment：
The selection of raw material in following examples：
Aluminium coated：The atactic copolymerized polypropene that the trade mark of Borouge chemical company production is RD265CF；Polyplastics company gives birth to The trade mark of production is 8007F-500 cyclenes copolymer；
Sandwich layer：Borouge chemical company production the trade mark be HD915CF HOPP be；
Hot sealing layer：The ternary polymerized polypropylene material one that the trade mark of Yanshan Petrochemical company production is C5908, the ternary polymerization The processability of polypropylene material one is good；The ternary polymerized polypropylene material two that the trade mark of Hu Shi chemical companies production is SFC750M, described three The heat sealability of first COPP material two is good；The opening agent that the trade mark of precious Leadd B.V's production is ABPP10S.The ternary polymerization Polypropylene material one, which melts, refers to 8g/10min, and the ternary polymerized polypropylene material two, which melts, refers to 7g/10min.
The production craft step of VMCPP films：
(1) aluminium coated raw particles, core layer raw material particle and hot sealing layer raw particles are separately added into the barrel of extruder In, it is 230 DEG C to control aluminium coated raw particles melt temperature, and the first layer raw particles melt temperature of sandwich layer is 240~235 DEG C, second layer raw particles melt temperature be 235 DEG C, hot sealing layer raw particles melt temperature be 230 DEG C, after coextrusion mold Curtain coating cooling and shaping obtains polypropylene film；Then the aluminium coated of the polypropylene film is subjected to sided corona treatment, cut afterwards Winding, concrete technology flow process are as shown in Figure 3；
(2) above-mentioned polypropylene film is obtained into VMCPP films by the aluminize processing of process of ion plating treatment technology, Concrete technology flow process is as shown in Figure 4.
Press the production that the parameter in following examples carries out VMCPP films respectively using above-mentioned technique：
Embodiment 1
The mass ratio of atactic copolymerized polypropene and cyclenes copolymer is 65 in aluminium coated:35；The agent of hot sealing layer split shed, ternary COPP material one, the mass ratio of ternary polymerized polypropylene material two are 1:51:49；Control aluminium coated, sandwich layer, the layer of hot sealing layer Thickness rate is 2.8:21.5:6.3；
The first layer of the sandwich layer and the Thickness ratio of the second layer are 18.5:2.5；
The OD values of aluminizing of the VMCPP films are 2.7, and the unwinding tension of CPP films is 180N in process of aluminizing, winding Power is 150N, and the rewind slitting tension force of obtained VMCPP films is 170N.
Embodiment 2
The mass ratio of atactic copolymerized polypropene and cyclenes copolymer is 69 in aluminium coated:31；The agent of hot sealing layer split shed, ternary COPP material one, the mass ratio of ternary polymerized polypropylene material two are 3:49:47；Control aluminium coated, sandwich layer, the layer of hot sealing layer Thickness rate is 3.2:20.5:5.7；
The first layer of the sandwich layer and the Thickness ratio of the second layer are 18.5:2.5；
The OD values of aluminizing of the VMCPP films are 2.7, and the unwinding tension of CPP films is 185N in process of aluminizing, winding Power is 160N, and the rewind slitting tension force of obtained VMCPP films is 180N.
Embodiment 3
The mass ratio of atactic copolymerized polypropene and cyclenes copolymer is 67 in aluminium coated:33；The agent of hot sealing layer split shed, ternary COPP material one, the mass ratio of ternary polymerized polypropylene material two are 2:50:48；Control aluminium coated, sandwich layer, the layer of hot sealing layer Thickness rate is 3:21:6；
The first layer of the sandwich layer and the Thickness ratio of the second layer are 18.5:2.5；
The OD values of aluminizing of the VMCPP films are 2.7, and the unwinding tension of CPP films is 200N in process of aluminizing, winding Power is 170N, and the rewind slitting tension force of obtained VMCPP films is 190N.
Table 1 below is the barrier property of the barrier property of VMCPP film substrates and conventional obstructive film substrate obtained by the present invention Test and comparison result：
Table 2 below is composite package film (19BOPP/30VMCPP) product that VMCPP film substrates obtained by the present invention are formed The barrier property test and comparison result for the composite package film product that barrier property is formed with conventional obstructive film substrate：
From the test result of upper table：VMCPP films of the present invention have more preferable barrier property.The present invention in addition VMCPP films are by fluorescent tube or flashlight progress light through test, and obtained light is through test photo as shown in figure 1, originally The aluminium lamination of invention VMCPP film light blockings is evenly distributed, almost without the bright spot of needle-like, and the conventional obstructive film shown in Fig. 2 Light it is more through test photo pinprick dress bright spot.

Claims (8)

  1. A kind of 1. high-barrier VMCPP films, it is characterised in that：The film includes the aluminium coated, sandwich layer, heat being combined with each other successively Sealing, the aluminium coated, sandwich layer, the Thickness ratio of hot sealing layer are (2.8~3.2):(20.5~21.5):(5.7~6.3)；It is described Aluminium coated includes atactic copolymerized polypropene and cyclenes copolymer, and the mass ratio of the atactic copolymerized polypropene and cyclenes copolymer is (65~69):(31~35)；The sandwich layer includes the HOPP containing nucleator；The hot sealing layer includes opening agent, three First COPP material one, ternary polymerized polypropylene material two, the opening agent, ternary polymerized polypropylene material one, ternary polymerization gather The mass ratio of propylene material two is (1~3):(49~51):(47~49)；The ternary polymerized polypropylene material one, which melts, refers to 8g/ 10min, the ternary polymerized polypropylene material two, which melts, refers to 7g/10min.
  2. 2. high-barrier VMCPP films as claimed in claim 1, it is characterised in that：The aluminium coated, sandwich layer, the layer of hot sealing layer Thickness rate is 3:21:6.
  3. 3. high-barrier VMCPP films as claimed in claim 1, it is characterised in that：The sandwich layer is by first layer and second layer structure Into the first layer and aluminium coated are compound, and the second layer and hot sealing layer are compound, and the Thickness ratio of the first layer and the second layer is 18.5:2.5。
  4. 4. high-barrier VMCPP films as claimed in claim 1, it is characterised in that：The atactic copolymerized polypropene of the sandwich layer with Cyclenes copolymer mass ratio is 67:33.
  5. 5. high-barrier VMCPP films as claimed in claim 1, it is characterised in that：The opening agent of the hot sealing layer, ternary polymerization Polypropylene material one, the mass ratio of ternary polymerized polypropylene material two are 2:50:48.
  6. 6. high-barrier VMCPP films as claimed in claim 1, it is characterised in that：The atactic copolymerized polypropene is Borouge The product that the trade mark of work company production is RD265CF；The cyclenes copolymer is that the trade mark of Polyplastics company production is 8007F-500 product；The HOPP is the product that the trade mark of Borouge chemical company production is HD915CF；It is described to open Mouth agent is the product that the trade mark of precious Leadd B.V's production is ABPP10S；The ternary polymerized polypropylene material one is that Yanshan Petrochemical is public The product that the trade mark of department's production is C5908, the ternary polymerized polypropylene material two are that the trade mark of Hu Shi chemical companies production is SFC750M product.
  7. 7. high-barrier VMCPP films as claimed in claim 1, it is characterised in that：The OD values of aluminizing of the film are 2.7.
  8. 8. a kind of production technology of high-barrier VMCPP films as described in claim any one of 1-7, includes the plating of CPP films Aluminium process, it is characterised in that：The unwinding tension of CPP films is 180~200N in the process of aluminizing, winding tension is 150~ 170N, the rewind slitting tension force of obtained VMCPP films is 170~190N.
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109016760A (en) * 2018-07-26 2018-12-18 黄山永新股份有限公司 A kind of high Hot Tack strength high barrier aluminum-plating film and its production method
CN112094455A (en) * 2020-09-16 2020-12-18 中国科学院宁波材料技术与工程研究所 Polypropylene aluminum-plated film substrate film and preparation method thereof
CN112537110A (en) * 2020-11-30 2021-03-23 永新股份（黄山）包装有限公司 Recyclable high-barrier VMCPP film and production method thereof
CN113619239A (en) * 2021-08-10 2021-11-09 佛山市南海利达印刷包装有限公司 Composite film and packaging bag and production method thereof
CN113815280A (en) * 2021-08-05 2021-12-21 黄山永新股份有限公司 Easily-recycled high-barrier low-temperature heat-seal packaging composite film and production method thereof

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