CN113386436A - Multilayer film structure for packaging - Google Patents

Multilayer film structure for packaging Download PDF

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Publication number
CN113386436A
CN113386436A CN202010729929.3A CN202010729929A CN113386436A CN 113386436 A CN113386436 A CN 113386436A CN 202010729929 A CN202010729929 A CN 202010729929A CN 113386436 A CN113386436 A CN 113386436A
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CN
China
Prior art keywords
layer
packaging
adhesive
multilayer film
film structure
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
CN202010729929.3A
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Chinese (zh)
Inventor
庄荣衔
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.)
Daquan Caiyi Industry Co ltd
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Daquan Caiyi Industry Co ltd
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Filing date
Publication date
Application filed by Daquan Caiyi Industry Co ltd filed Critical Daquan Caiyi Industry Co ltd
Publication of CN113386436A publication Critical patent/CN113386436A/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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • B32B27/32—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
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • 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

Abstract

The application provides a multilayer film structure for packing, contains substrate layer, intermediate level and outer coating, bonds through first adhesion material between substrate layer and the intermediate level, bonds through the second adhesion material and bonds between intermediate level and the outer coating, wherein first adhesion material and second adhesion material in at least one of them contains first glue film and second glue film, first glue film is water-soluble PU and layered structure's combined material, the second glue film is solvent type PU. The multilayer film structure of the present application has the effect of improving barrier properties (including moisture and gas) and can be applied as a food or other packaging material requiring barrier function.

Description

Multilayer film structure for packaging
Technical Field
The present application relates to a multi-layer film structure for packaging, which can be applied to a multi-layer film structure of a high temperature sterilization bag, but is not limited to the use of the packaging material structure.
Background
Product packaging requires certain specific specification characteristics to be achieved, depending on the contents. For example, in the case of packaging bags for food (uncooked food, cooked food, microwave food, etc.), most of them need to have the requirements of moisture resistance, air barrier, high temperature resistance, surface printing, heat sealing, etc.
Most of the conventional food packaging bags are made of a composite material formed by bonding pet (polyethylene terephthalate), opp (oriented polypropylene) or Nylon (Nylon) as a base material with an aluminum foil layer, a cpp (cast polypropylene) layer, and another layer or multiple layers of L-LDPE (linear-low density polyethylene) layers. However, in the prior art, it is still difficult to satisfy the requirement of high gas barrier property in the application of high temperature resistant packaging bag.
Disclosure of Invention
In view of the foregoing, the present application provides for the use of multilayer film structures for packaging that can improve barrier properties.
In order to achieve the above and other objects, the present application provides a multilayer film structure for packaging, including a substrate layer, an intermediate layer and an outer coating layer, wherein the substrate layer and the intermediate layer are bonded by a first adhesive material, and the intermediate layer and the outer coating layer are bonded by a second adhesive material, characterized in that: at least one of the first adhesive material and the second adhesive material comprises a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is a composite material of water-soluble PU (Polyurethane Dispersion) and a laminated structure, and the second adhesive layer is solvent-based PU.
In one embodiment of the present application, the layered structure may have an aspect ratio of 50 to 500.
In an embodiment of the present application, the weight percentage of the layered structure to the first adhesive layer may be in a range of 0.1% to 20%.
In an embodiment of the present application, the material of the outer coating layer may be cpp (cast polypropylene), pet (polyethylene terephthalate), or L-LDPE (line-low density polyethylene).
In an embodiment of the present disclosure, the material of the substrate layer may be pet (polyethylene terephthalate), pp (polypropylene), pe (polyethylene), cellophane (cellophane), Nylon (Oriented Nylon), or opp (Oriented polypropylene).
In an embodiment of the present application, the material of the intermediate layer is Nylon (Oriented Nylon), pet (polyethylene terephthalate), opp (Oriented polypropylene), or cellophane (cellophane).
In an embodiment of the present application, the material of the layered structure is Clay (Clay).
In an embodiment of the present application, the first adhesive material and the second adhesive material may both include the first adhesive layer and the second adhesive layer.
In an embodiment of the present application, the second adhesive material may only include the second adhesive layer.
In an embodiment of the present application, the first adhesive material may only include the second adhesive layer.
Accordingly, the multilayer film structure disclosed in the embodiments of the present application has an effect of improving barrier property, so that the contents are effectively isolated from moisture and oxygen outside, and thus, the multilayer film structure can be applied as an outer packaging material for various types of foods (dry foods, microwave foods, frozen foods), cosmetics, care products, medical products, daily necessities, or electronic products.
Other features and embodiments of the present application will be described in detail below with reference to the drawings.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of a first embodiment of a multilayer film structure for packaging of the present application;
FIG. 2 is a schematic structural view showing the uniform distribution of the layered structure in the first adhesive layer;
fig. 3 is a schematic view of a second embodiment of a multilayer film structure for packaging of the present application.
Description of the symbols
10 substrate layer 20 intermediate layer
30 outer cover 40 first adhesive material
50 second adhesive 200 Water-soluble PU
100 layered structure A first adhesive layer
B second adhesive layer
Detailed Description
In order to make the objects, features, and effects of the present application easier to understand, embodiments and drawings for describing the present application in detail are provided below.
As used herein, the terms "a" or "an" are used to describe a structure, region or area, etc. This is for convenience of description only and provides a general sense of the scope of the application. Accordingly, unless clearly indicated to the contrary, such description should be read to include one or at least one and the singular also includes the plural.
As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a term does not include a limitation, but includes a limitation, such that a structure, region, or area does not expressly appear to be limited to only one of the elements.
As used herein, the terms "first" or "second," and the like, are used in the singular to distinguish or refer to the same or similar elements or structures, and do not necessarily imply a spatial order to the structures, regions, or areas. It should be understood that in some cases or configurations, ordinal terms may be used interchangeably without affecting the implementation of the application.
Please refer to fig. 1, which is a diagram illustrating a structure of a multi-layer film for packaging according to a first embodiment of the present application.
The multilayer film structure 1 of the present embodiment mainly includes a substrate layer 10, an intermediate layer 20 and an outer coating layer 30, the substrate layer 10 and the intermediate layer 20 are bonded by a first bonding material 40, and the intermediate layer 20 and the outer coating layer 30 are bonded by a second bonding material 50. At least one of the first adhesive material 40 and the second adhesive material 50 includes a first adhesive layer a and a second adhesive layer B, the first adhesive layer a is a composite material of a water-soluble PU (Polyurethane Dispersion) and a layered structure, and the second adhesive layer B is a solvent-based PU. In the embodiment of fig. 1, the first adhesive material 40 includes the first adhesive layer a and the second adhesive layer B as an example.
In this embodiment, the material of the outer cover 30 may be, for example, cpp (case polypropylene), pet (polyethylene terephthalate), L-LDPE (line-low density polyethylene), or other film materials, but is not limited thereto. The substrate layer 10 may be, for example, PET, PP (polypropylene), pe (polyethylene), cellophane (cellophane), Nylon (Oriented Nylon), or opp (Oriented polypropylene), but is not limited thereto, and the substrate layer 10 may have a printed layer, an electroplated layer, or paper. The material of the middle layer 20 may be Nylon (ordered Nylon), pet (polyethylene terephthalate), opp (ordered polypropylene) or other extended materials, but is not limited thereto.
As shown in fig. 2, it is a schematic structural diagram of the uniform distribution of the layered structure in the first adhesive layer.
In the first adhesive layer a of this embodiment, the water-soluble PU200 may be a mixture of polyurethane resin (urethane resin) and water.
In the first adhesive layer a of this embodiment, the layered structure 100 may be a plurality of modified or unmodified layered structures, and the material of the layered structure may be, but is not limited to, Clay (Clay), and the layered structures have one or more aspect ratios, and may be first mixed in de-ionized water (de-ionized water), and then the water-soluble PU200 is added and stirred and mixed, and then the mixture is linearly coated on the intermediate layer 20. In addition, the first adhesive layer a can be selectively and linearly coated on the substrate layer, the intermediate layer, or the overcoat layer to form at least one of the first adhesive material 40 and the second adhesive material 50.
The layer structure 100 preferably has an aspect ratio of 50-500, and the weight percentage of the layer structure 100 to the first adhesive layer a may be in a range of 0.1 to 20%, and the layer structure 100 may be dispersed in the water-soluble PU200 in a nano-scale size, and may be in a stacked and staggered configuration, such that the gas transmission path is lengthened or complicated, and a gas blocking effect is further generated.
Therefore, when the multilayer film structure of the embodiment is applied to a product packaging bag, external gas or liquid is difficult to penetrate into the packaging bag, so that the oxidation of contents caused by the entrance of moisture can be avoided, a certain storage life can be further met, and the requirement of transparency of the packaging bag can be also met, so that the multilayer film structure is suitable for a high-temperature sterilization bag for packaging products such as dry food, microwave food, frozen food, medical products, daily necessities, electronic parts and the like.
In the first embodiment (please refer to fig. 1), the first adhesive material 40 includes the first adhesive layer a and the second adhesive layer B, and the second adhesive material 50 may include only the second adhesive layer B, which can improve the gas barrier property of the package. However, the present application is not limited thereto, and the first adhesive material 40 may also be implemented in a modified manner, in which the first adhesive material includes only the second adhesive layer B, and the second adhesive material 50 includes the first adhesive layer a and the second adhesive layer B.
The following experimental examples are provided for understanding the present application, and are not intended to limit the present application.
Example 1
Firstly, the layered clay PGN (Nanocor company in America) with the length-diameter ratio of 300-500 is mixed in deionized water, then water-soluble PU is added, and the mixture is stirred and mixed to form a first adhesive layer, and the first adhesive layer is coated on a 12-micron PET film serving as a substrate layer and dried for later use.
A 60 micron CPP film was used as the outer cover and a 15 micron nylon 6 as the middle layer.
And coating the solvent type PU of the second adhesive material on the CPP film by a wire rod, and attaching the CPP/PA 6 composite film with the nylon 6 film. And then, coating the solvent type PU serving as a second adhesive layer on the surface of the nylon 6 of the composite film, and attaching the PET film with the first adhesive layer to form the CPP// PA6// PET laminated film.
The oxygen permeability of the laminated film was 12c.c/m2-day-atm。
Example 2
Firstly, mixing layered clay NSP (Taiwan multi-chain science and technology company, China) with the length-diameter ratio of 50-100 into deionized water, then adding water-soluble PU, stirring and mixing to form a first adhesive layer, coating the first adhesive layer on a 12-micrometer PET film serving as a substrate layer, and drying for later use.
A 60 micron CPP film was used as the outer cover and a 15 micron nylon 6 as the middle layer.
And coating the solvent type PU of the second adhesive material on the CPP film by a wire rod, and attaching the CPP/PA 6 composite film with the nylon 6 film. And then, coating the solvent type PU serving as a second adhesive layer on the surface of the nylon 6 of the composite film, and attaching the PET film with the first adhesive layer to form the CPP// PA6// PET laminated film.
The oxygen permeability of the laminated film was found to be 18c.c/m2-day-atm。
Comparative example
The solvent type PU is coated on a 60 micron CPP film by a wire rod, a 15 micron nylon 6 film is bonded to form a CPP// PA6 composite film, then the solvent type PU is coated on the nylon 6 surface of the composite film, and a 12 micron PET film is bonded to form a CPP// PA6// PET lamination film.
The oxygen permeability of the laminated film was 68c.c/m2-day-atm。
Thus, the barrier effect of the foregoing examples 1 and 2 is significantly better than that of the comparative example.
Please refer to fig. 3, which is a diagram illustrating a structure of a multi-layer film for packaging according to a second embodiment of the present application. In this embodiment, the first adhesive material 40 and the second adhesive material 50 both include the first adhesive layer a and the second adhesive layer B, which can also have the effect of improving the barrier property.
Accordingly, in the embodiment of the present application, the first adhesive material 40 and the second adhesive material 50 may be a structure including the first adhesive layer a and the second adhesive layer B, and the first adhesive layer a is a composite material of the water-soluble PU200 and the layered structure 100, and the first adhesive layer a provides an effect of improving water vapor barrier property, and the second adhesive layer B provides an adhesive function, and also meets the requirement of transparency of the packaging bag.
In summary, the multilayer film structures of the first and second embodiments of the present disclosure can have the effect of improving the moisture barrier effect, so that the contents can be effectively isolated from the external moisture and oxygen, and can be used as the outer packaging material for various types of food (dry food, microwave food, frozen food), cosmetics, health products, medical products, daily products, or electronic products.
The above-described embodiments and/or implementations are only for illustrating the preferred embodiments and/or implementations of the technology of the present application, and are not intended to limit the implementations of the technology of the present application in any way, and those skilled in the art can make modifications or changes to other equivalent embodiments without departing from the scope of the technology disclosed in the present application, but should be construed as technology or implementations substantially the same as the present application.

Claims (10)

1. A multi-layer film structure for packaging comprises a substrate layer, a middle layer and an outer coating layer, wherein the substrate layer is combined with the middle layer through a first adhesion material, and the middle layer is combined with the outer coating layer through a second adhesion material, and the multi-layer film structure is characterized in that:
at least one of the first adhesive material and the second adhesive material comprises a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is a composite material of water-soluble PU and a layered structure, and the second adhesive layer is solvent-based PU.
2. The multilayer film structure for packaging according to claim 1, wherein the layered structure has an aspect ratio of 50-500.
3. The multilayer film structure for packaging according to claim 2, wherein the weight percentage of the layered structure to the first glue layer is in the range of 0.1% to 20%.
4. The multilayer film structure for packaging as claimed in claim 3, wherein the material of the outer coating layer is CPP, PET or L-LDPE.
5. The multilayer film structure for packaging of claim 4, wherein the material of the substrate layer is PET, PP, PE, cellophane, nylon or OPP.
6. The multilayer film structure for packaging of claim 3, wherein the material of the intermediate layer is nylon, PET or OPP.
7. A multilayer film structure for packaging according to claim 3, wherein the material of said layered structure is clay.
8. The multilayer film structure for packaging of claim 3, wherein the first adhesive material and the second adhesive material both comprise the first glue layer and the second glue layer.
9. The multilayer film structure for packaging of claim 3, wherein the second adhesive comprises only the second glue layer.
10. The multilayer film structure for packaging of claim 3, wherein the first adhesive comprises only the second glue layer.
CN202010729929.3A 2020-03-11 2020-07-27 Multilayer film structure for packaging Pending CN113386436A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW109108091A TWI727698B (en) 2020-03-11 2020-03-11 Multilayer film structure for packaging
TW109108091 2020-03-11

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Publication Number Publication Date
CN113386436A true CN113386436A (en) 2021-09-14

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TW (1) TWI727698B (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9801140D0 (en) * 1998-04-01 1998-04-01 Tetra Laval Holdings & Finance Laminated packaging material and packaging containers made therefrom

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TWI727698B (en) 2021-05-11

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