CN114872406A - High-barrier film and package structure with the same and capable of being steamed and recycled - Google Patents

High-barrier film and package structure with the same and capable of being steamed and recycled Download PDF

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Publication number
CN114872406A
CN114872406A CN202210420610.1A CN202210420610A CN114872406A CN 114872406 A CN114872406 A CN 114872406A CN 202210420610 A CN202210420610 A CN 202210420610A CN 114872406 A CN114872406 A CN 114872406A
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CN
China
Prior art keywords
film
layer
rcpp
thickness
barrier film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210420610.1A
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Chinese (zh)
Inventor
席云福
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangzhou Bolaien Packaging Materials Co ltd
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Guangzhou Bolaien Packaging Materials Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Guangzhou Bolaien Packaging Materials Co ltd filed Critical Guangzhou Bolaien Packaging Materials Co ltd
Priority to CN202210420610.1A priority Critical patent/CN114872406A/en
Publication of CN114872406A publication Critical patent/CN114872406A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • 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
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)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
    • 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
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • 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
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • 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
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7246—Water vapor 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
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses a high-barrier film and a package structure with the same and capable of being cooked and recycled, and belongs to the technical field of food packaging, wherein the high-barrier film comprises a printing layer, an ink layer and a high-barrier layer which are sequentially compounded from outside to inside, the printing layer is a BOPP film, and the high-barrier layer is as follows: 1) the structure is RCPP/EVOH/RCPP multilayer co-extruded film; or 2) an aluminized or aluminized BOPP film, an adhesive layer and an RCPP film which are arranged from the ink layer to the inside in sequence. The high-barrier film provided by the invention can simultaneously realize three properties of recyclability, high-temperature cooking resistance and high barrier property of a packaging structure.

Description

High-barrier film and retortable and recyclable packaging structure with same
Technical Field
The invention belongs to the technical field of food packaging, and particularly relates to a high-barrier film and a retortable and recyclable packaging structure with the high-barrier film.
Background
The retort pouch is a composite plastic film pouch that can be heat treated, having the advantages of both can containers and boiling water resistant plastic bags. The multi-purpose three-layer material of bag of cooking is compounded and made up, the typical bag structure of cooking is: the outer layer is a polyester film for reinforcement; the middle layer is aluminum foil for light prevention, moisture prevention and air leakage prevention; the inner layer is a polyolefin film (e.g., polypropylene film) for heat sealing and food contact. When the packaging structure of the cooking bag in the prior art is applied to the packaging of food, the packaging structure has the defect of environmental pollution due to non-recycling.
Disclosure of Invention
The invention aims to solve the technical problems and provide a recyclable high-barrier film, so as to provide an alternative scheme for the existing retort pouch packaging.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a high resistant separates film, includes printing layer, printing ink layer, the high resistant separation layer that forms by outer to interior complex in proper order, the printing layer is the BOPP membrane, the high resistant separation layer is: 1) the structure is RCPP/EVOH/RCPP multilayer co-extruded film; or 2) an aluminized or aluminized BOPP film, an adhesive layer and an RCPP film which are arranged from the ink layer to the inside in sequence.
Further, the thickness of the printing layer is 15-60 μm.
Further, the thickness of the printing layer is 18-50 μm.
Further, in the step 1), the thickness of the multilayer co-extruded film is 40-150 μm.
Further, the thickness of the multilayer co-extruded film is 50-100 μm.
Further, in the 2), the thickness of the BOPP film plated with aluminum or aluminum oxide is 15 to 60 μm.
Further, the thickness of the aluminized or alumina-plated BOPP film is 15-30 μm.
Further, in the 2), the RCPP film has a thickness of 40 to 150 μm.
Further, the RCPP film has a thickness of 40-100 um.
Further, the adhesive layer is made of polyurethane adhesive.
A retortable recyclable packaging structure comprising the high barrier film.
Compared with the prior art, the film provided by the invention has the properties of high barrier and high temperature resistance, and the whole film mainly adopts a single polyolefin structure, has the characteristics of recoverability and recyclability, and is more environment-friendly than other existing materials.
Drawings
FIG. 1 is a schematic structural diagram of a high-barrier film according to the present invention;
FIG. 2 is a schematic structural view of the high barrier layer 1);
FIG. 3 is a schematic structural view of the high barrier layer 2);
wherein, 1, printing layer; 2, an ink layer; 3, high barrier layer; 3-1a RCPP film; 3-2a EVOH film; 3-1b, plating aluminum or aluminum oxide BOPP film; 3-2b, an adhesive layer; 3-3b RCPP film.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "outer", "inner", "thickness", "skin", "inner layer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Example 1
The embodiment provides a high barrier film, including printing layer 1, printing ink layer 2, high barrier layer 3 that form by adopting conventional food package composite technology to compound in proper order from outside to inside, printing layer 1 is the BOPP membrane, high barrier layer 3 is the multilayer coextrusion film that the structure is RCPP/EVOH/RCPP, as shown in fig. 1, 2.
Wherein, the printing layer 1 is positioned on the outermost layer, has the thickness of 15-60 μm, preferably 18-50 μm and mainly plays a role of printing. The high barrier layer 3 is a functional layer which is an innermost layer, is in direct contact with food, and mainly provides a barrier function against oxygen and water vapor. The RCPP film 3-1a, namely a cooking-grade cast polypropylene film, has the performances of light weight, high transparency, strong mechanical adaptability, good moisture resistance and heat resistance, is mainly characterized by high temperature resistance, capability of being cooked at the high temperature of 121 ℃, high safety performance, and in addition, the high-temperature-resistant, alkali-resistant and grease-resistant performance and high impact strength. The EVOH (ethylene-vinyl alcohol copolymer) film 3-2a is a crystalline polymer having a chain structure, integrates good processability of the ethylene polymer and extremely high gas barrier property of the vinyl alcohol polymer, and is an excellent barrier material having a gas barrier property 100 times higher than PA, 10000 times higher than PE and PP, and several tens times higher than PVDC, and further, EVOH is excellent in transparency, gloss, mechanical strength, stretchability, wear resistance, cold resistance, and surface strength. Both RCPP and EVOH are used in the food industry for aseptic packaging, hot filling and retort pouches, packaging of dairy products, meat, fruit juice cans, etc., and are food grade packaging materials that are safe to use. The RCPP and EVOH are co-extruded in a multi-layer way by a conventional process to prepare the multi-layer co-extruded film with the structure of RCPP/EVOH/RCPP, so that the barrier property can be further enhanced, and an excellent oxygen and water vapor barrier effect can be provided.
Example 2
The only difference from example 1 is: the high barrier layer 3 is an aluminized or aluminized BOPP film, an adhesive layer and an RCPP film which are sequentially arranged from the ink layer to the inside, as shown in figure 3.
The method comprises the following steps of taking an aluminized or aluminized BOPP film 3-1b, an adhesive layer 3-2b and an RCPP film 3-3b which are sequentially arranged from the ink layer 2 to the inside as a high barrier layer 3, wherein the thickness of the aluminized or aluminized BOPP film 3-1b is 15-60 mu m, preferably 15-30 mu m; the RCPP films 3-3b have a thickness of 40-150 μm, preferably 40-100 um. The BOPP film 3-1b is a biaxial stretching polypropylene film. The BOPP film 3-1b is produced by first making a melt of high molecular polypropylene into a sheet or thick film through a long and narrow head, then stretching it in two perpendicular directions (longitudinal, transverse) simultaneously or stepwise at a certain temperature and a set speed in a special stretching machine, and subjecting it to appropriate cooling or heat treatment or special processing (e.g., corona, coating, etc.). The BOPP film 3-1b is a very important flexible packaging material, is colorless, odorless, tasteless and nontoxic, and has high tensile strength, impact strength, rigidity, toughness and good transparency. The barrier property can be improved by plating aluminum or aluminum oxide film on the surface of the BOPP film 3-1b, and the heat sealing property can be improved by compounding with the RCPP film 3-3 b.
The water vapor permeability of the films of the examples of the invention (38 ℃/903R.H.) was determined<1g/m 2 D, oxygen permeability (23 ℃/03R.H.)<1cm 3 /m 2 D, resistance to cooking at 121 ℃.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the present invention shall be covered thereby. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a high resistant separates film, its characterized in that includes by outer printing layer, printing ink layer, the high resistant interlayer that forms to interior complex in proper order, the printing layer is the BOPP membrane, the high resistant interlayer is: 1) the structure is RCPP/EVOH/RCPP multilayer co-extruded film; or 2) an aluminized or aluminized BOPP film, an adhesive layer and an RCPP film which are arranged from the ink layer to the inside in sequence.
2. The high barrier film according to claim 1, wherein the thickness of the printed layer is 15 to 60 μm.
3. The high barrier film according to claim 2, wherein the thickness of the printed layer is 18 to 50 μm.
4. The high barrier film according to claim 1, wherein the thickness of the multilayer co-extruded film in 1) is 40-150 μm.
5. The high barrier film of claim 4, wherein the thickness of the multilayer coextruded film is 50-100 μm.
6. The high barrier film according to claim 1, wherein the thickness of the BOPP film plated with aluminum or aluminum oxide in 2) is 15-60 μm.
7. The high barrier film according to claim 6, wherein the thickness of the aluminized or alumina-plated BOPP film is 15-30 μm.
8. The high barrier film according to claim 1, wherein in 2), the RCPP film has a thickness of 40 to 150 μm.
9. The high barrier film of claim 8, wherein the RCPP film has a thickness of 40-100 um.
10. A retortable recyclable packaging structure comprising a high barrier film as claimed in any one of claims 1 to 9.
CN202210420610.1A 2022-04-20 2022-04-20 High-barrier film and package structure with the same and capable of being steamed and recycled Pending CN114872406A (en)

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CN202210420610.1A CN114872406A (en) 2022-04-20 2022-04-20 High-barrier film and package structure with the same and capable of being steamed and recycled

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CN202210420610.1A CN114872406A (en) 2022-04-20 2022-04-20 High-barrier film and package structure with the same and capable of being steamed and recycled

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CN114872406A true CN114872406A (en) 2022-08-09

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024110323A1 (en) * 2022-11-21 2024-05-30 Huhtamaki Flexible Packaging Germany Gmbh & Co. Kg Retort-sterilisable layered material made predominantly of polypropylene

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024110323A1 (en) * 2022-11-21 2024-05-30 Huhtamaki Flexible Packaging Germany Gmbh & Co. Kg Retort-sterilisable layered material made predominantly of polypropylene

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