A multilayer composite film

Abstract

The utility model discloses a kind of multilayer composite films, including plating silicon oxide PET film layer and multilayer co-extrusion PE film layer, plating silicon oxide PET film layer and multilayer co-extrusion PE film layer between being equipped with nylon film layer, plating silicon oxide PET film layer outside surface is coated with matt ink layer, and plating silicon oxide PET film layer inside surface is coated with ink layer, nylon film layer is compounded in the outside surface of multilayer co-extrusion PE film layer by environmental protection glue layer, multilayer co-extrusion PE film layer inside surface is coated with antibacterial coating.The utility model is compounded by environmental protection glue layer and plating silicon oxide PET film layer, nylon film layer, multilayer co-extrusion PE film layer, plating silicon oxide PET film layer inside and outside surface is coated with ink layer and matt ink layer respectively, multilayer co-extrusion PE film layer inside surface is coated with antibacterial coating, so that multilayer composite film has double-sided printing, high barrier property and good antibacterial property simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of composite membrane technology, specifically to a multilayer composite membrane. Background Technology

[0002] With the rapid development of the packaging industry and the market demand from the food and pharmaceutical industries, packaging films used in food and pharmaceuticals are typically required to possess good barrier, printability, and antibacterial properties. However, most existing multilayer composite films used for food and pharmaceutical packaging only possess barrier properties. Generally, high-barrier multilayer composite films do not have good printability and antibacterial properties. Food and pharmaceutical packaging manufacturers need to perform secondary processing on multilayer composite films to add printing and antibacterial structures, which increases the production cost of packaging films and is detrimental to the healthy development of both the packaging film and food and pharmaceutical industries. Utility Model Content

[0003] The purpose of this invention is to provide a multilayer composite film to solve the problems existing in the background art.

[0004] To achieve the above objectives, this utility model provides a multilayer composite film, comprising a silica-coated PET film layer and a multilayer co-extruded PE film layer, with a nylon film layer disposed between the silica-coated PET film layer and the multilayer co-extruded PE film layer. The silica-coated PET film layer is a PET film with a silica layer deposited on its inner side by a vacuum evaporation process. The outer side of the silica-coated PET film layer is coated with a matte ink layer, and the inner side of the silica-coated PET film layer is coated with an ink layer. The nylon film layer is laminated to the outer side of the multilayer co-extruded PE film layer with an environmentally friendly adhesive layer. The inner side of the multilayer co-extruded PE film layer is coated with an antibacterial coating, which is a mixture of ginger essential oil and agar, a mixture of lemon essential oil and oil agar, or a mixture of ginger essential oil, lemon essential oil, and oil agar.

[0005] Furthermore, the silicon oxide-coated PET film layer is a PET film with a silicon oxide layer coated on its inner surface, wherein the PET film thickness is 12-15 μm, the silicon oxide layer thickness is no more than 0.2 μm, and the vacuum degree of the vacuum evaporation process is 10. -4 Pa.

[0006] Furthermore, the thickness of the nylon film layer is 15-20 μm, and the thickness of the multilayer co-extruded PE film layer is 50-120 μm.

[0007] Furthermore, a PET film layer is provided between the silicon oxide-coated PET film layer and the multilayer co-extruded PE film layer. The PET film layer is bonded between the silicon oxide-coated PET film layer and the nylon film layer by an environmentally friendly adhesive layer. The thickness of the PET film layer is 12-15μm.

[0008] Furthermore, the environmentally friendly adhesive layer is an adhesive that does not contain benzene, toluene, ethylbenzene, or xylene, and the thickness of the environmentally friendly adhesive layer is 2-3 μm.

[0009] Furthermore, the thickness of both the matte ink layer and the ink layer is 2-4 μm.

[0010] Furthermore, the thickness of the antibacterial coating is 3-6 μm.

[0011] Furthermore, the total thickness of the multilayer composite film is 100-160 μm.

[0012] Furthermore, the ink layer is a water-based ink or a non-water-based ink.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model uses an environmentally friendly adhesive layer to laminate a silicon oxide-coated PET film layer, a PET film layer, a nylon film layer, and a multi-layer co-extruded PE film layer in three stages. The inner and outer sides of the silicon oxide-coated PET film layer are coated with an ink layer and a matte ink layer, respectively, and the inner side of the multi-layer co-extruded PE film layer is coated with an antibacterial coating, so that the multi-layer composite film has double-sided printing, high barrier performance, and good antibacterial performance. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the multilayer composite membrane structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the silicon oxide-coated PET film structure of this utility model.

[0017] In the diagram: 1. PET film layer coated with silicon oxide, 101. PET film 102. 2. Multilayer co-extruded PE film layer, 3. PET film layer, 4. Nylon film layer, 5. Environmentally friendly adhesive layer, 6. Matte ink layer, 7. Ink layer, 8. Antibacterial coating. Detailed Implementation

[0018] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0019] In the description of the embodiments of this utility model, it should be understood that if the embodiments of this utility model involve directional indications, such as up, down, left, right, front, back, inside, outside, etc., the orientation or positional relationship of the indications is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the embodiments of this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In this embodiment of the invention, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part of a structure. They can be mechanical or electrical connections. They can be direct connections or indirect connections through an intermediate medium, and can represent the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0022] Example 1

[0023] like Figure 1 and Figure 2 As shown, this utility model embodiment provides a multilayer composite film, including a silicon oxide-coated PET film layer 1 and a multilayer co-extruded PE film layer 2. A PET film layer 3 and a nylon film layer 4 are disposed between the silicon oxide-coated PET film layer 1 and the multilayer co-extruded PE film layer 2. The silicon oxide-coated PET film layer 1 and the PET film layer 3, the PET film layer 3 and the nylon film layer 4, and the nylon film layer 4 and the multilayer co-extruded PE film layer 2 are all bonded together by an environmentally friendly adhesive layer 5. The environmentally friendly adhesive layer is an adhesive that does not contain benzene, toluene, ethylbenzene, or xylene. The silicon oxide-coated PET film layer 1 is a PET film 102 with a silicon oxide layer 101 deposited on its inner side by a vacuum evaporation process. The outer side of the silicon oxide-coated PET film layer 1 is coated with a matte ink layer 6, and the inner side of the silicon oxide-coated PET film layer 1 is coated with an ink layer 7, which is a water-based ink. The inner side of the multilayer co-extruded PE film layer 2 is coated with an antibacterial coating 8, which is a mixture of ginger essential oil and agar.

[0024] In this embodiment, the silicon oxide-coated PET film layer 1 is a PET film 102 with a silicon oxide layer 101 deposited on its inner surface. The thickness of the PET film 102 is 12 μm, the thickness of the silicon oxide layer 101 is 0.05 μm, and the vacuum degree of the vacuum evaporation process is 10. -4 Pa.

[0025] In this embodiment, the PET film layer 3 has a thickness of 12 μm, the nylon film layer 4 has a thickness of 15 μm, and the multilayer co-extruded PE film layer 2 has a thickness of 96 μm.

[0026] In this embodiment, the thickness of the environmentally friendly adhesive layer 5 is 2μm, the thickness of the matte ink layer 6 and the ink layer 7 is 2μm, and the thickness of the antibacterial coating 8 is 5μm.

[0027] The multilayer composite film preparation process in this embodiment:

[0028] (1) Preparation of double-sided printed silicon oxide PET film: First, a vacuum of 10 -4 Pa's vacuum evaporation process deposits a 0.05 μm thick silicon oxide layer on the inner side of a 12 μm thick PET film, forming a 12.05 μm thick silicon oxide-coated PET film layer. Then, a 2 μm thick water-based ink is first printed on the inner side of the silicon oxide-coated PET film layer, and then a 2 μm thick matte ink is printed on the outer side of the silicon oxide-coated PET film layer, to prepare a 16.05 μm thick double-sided printed silicon oxide-coated PET film layer.

[0029] (2) Composite of multilayer film: First, use environmentally friendly adhesive to composite the above-mentioned double-sided printed silicon oxide coated PET film layer with another PET film with a thickness of 12μm to form a 30.05μm double-sided printed silicon oxide coated PET / PET composite film. Then, use environmentally friendly adhesive to composite the double-sided printed silicon oxide coated PET-PET composite film with a thickness of 15μm nylon film to form a 47.05μm double-sided printed silicon oxide coated PET / PET / nylon composite film. Then, use environmentally friendly adhesive to composite the double-sided printed silicon oxide coated PET / PET / nylon composite film with a thickness of 96μm multilayer co-extruded PE to form a 145.05μm double-sided printed silicon oxide coated PET / PET / nylon / multilayer co-extruded PE composite film.

[0030] (3) Formation of multilayer composite film: A 5μm thick ginger essential oil-agar mixture is coated on the inner side of the double-sided printed silicon oxide-coated PET / PET / nylon / multilayer co-extruded PE composite film to form the multilayer composite film of this embodiment.

[0031] Example 2

[0032] like Figure 1 and Figure 2As shown, this utility model embodiment provides a multilayer composite film, including a silicon oxide-coated PET film layer 1 and a multilayer co-extruded PE film layer 2. A PET film layer 3 and a nylon film layer 4 are disposed between the silicon oxide-coated PET film layer 1 and the multilayer co-extruded PE film layer 2. The silicon oxide-coated PET film layer 1 and the PET film layer 3, the PET film layer 3 and the nylon film layer 4, and the nylon film layer 4 and the multilayer co-extruded PE film layer 2 are all bonded together by an environmentally friendly adhesive layer 5. The environmentally friendly adhesive layer is an adhesive that does not contain benzene, toluene, ethylbenzene, or xylene. The silicon oxide-coated PET film layer 1 is a PET film 102 with a silicon oxide layer 101 deposited on its inner side by a vacuum evaporation process. The outer side of the silicon oxide-coated PET film layer 1 is coated with a matte ink layer 6, and the inner side of the silicon oxide-coated PET film layer 1 is coated with an ink layer 7, which is a non-aqueous ink. The inner side of the multilayer co-extruded PE film layer 2 is coated with an antibacterial coating 8, which is a mixture of citric acid extract and oil agar.

[0033] In this embodiment, the PET film 102 of the silicon oxide PET film layer 1 has a thickness of 15 μm, the silicon oxide layer 101 has a thickness of 0.10 μm, and the vacuum degree of the vacuum evaporation process is 10. -4 Pa.

[0034] In this embodiment, the PET film layer 3 has a thickness of 15 μm, the nylon film layer 4 has a thickness of 20 μm, and the multilayer co-extruded PE film layer 2 has a thickness of 85 μm.

[0035] In this embodiment, the thickness of the environmentally friendly adhesive layer 5 is 2μm, the thickness of the matte ink layer 6 and the ink layer 7 is 2μm, and the thickness of the antibacterial coating 8 is 6μm.

[0036] The multilayer composite film preparation process in this embodiment:

[0037] (1) Preparation of double-sided printed silicon oxide PET film: First, a vacuum of 10 -4 Pa's vacuum evaporation process deposits a 0.10 μm thick silicon oxide layer on the inner side of a 15 μm thick PET film, forming a 15.10 μm thick silicon oxide-coated PET film layer. Then, a 2 μm thick water-based ink is first printed on the inner side of the silicon oxide-coated PET film layer, and then a 2 μm thick matte ink is printed on the outer side of the silicon oxide-coated PET film layer, to prepare a 19.10 μm thick double-sided printed silicon oxide-coated PET film layer.

[0038] (2) Composite of multilayer film: First, use environmentally friendly adhesive to composite the above-mentioned double-sided printed silicon oxide coated PET film layer with another PET film with a thickness of 15μm to form a 36.10μm double-sided printed silicon oxide coated PET / PET composite film. Then, use environmentally friendly adhesive to composite the double-sided printed silicon oxide coated PET-PET composite film with a thickness of 20μm nylon film to form a 58.10μm double-sided printed silicon oxide coated PET-PET-nylon composite film. Then, use environmentally friendly adhesive to composite the double-sided printed silicon oxide coated PET / PET / nylon composite film with a thickness of 85μm multilayer co-extruded PE to form a 145.10μm double-sided printed silicon oxide coated PET / PET / nylon / multilayer co-extruded PE composite film.

[0039] (3) Formation of multilayer composite film: A 6μm thick lemon essence-oil agar mixture is coated on the inner side of the above double-sided printed silicon oxide PET / PET / nylon / multilayer co-extruded PE composite film to form the multilayer composite film of this embodiment.

[0040] Example 3

[0041] like Figure 1 and Figure 2 As shown, this utility model embodiment provides a multilayer composite film, including a silicon oxide-coated PET film layer 1 and a multilayer co-extruded PE film layer 2. A PET film layer 3 and a nylon film layer 4 are disposed between the silicon oxide-coated PET film layer 1 and the multilayer co-extruded PE film layer 2. The silicon oxide-coated PET film layer 1 and the PET film layer 3, the PET film layer 3 and the nylon film layer 4, and the nylon film layer 4 and the multilayer co-extruded PE film layer 2 are all bonded together by an environmentally friendly adhesive layer 5. The environmentally friendly adhesive layer is an adhesive that does not contain benzene, toluene, ethylbenzene, or xylene. The silicon oxide-coated PET film layer 1 is a PET film 102 with a silicon oxide layer 101 deposited on its inner side by a vacuum evaporation process. The outer side of the silicon oxide-coated PET film layer 1 is coated with a matte ink layer 6, and the inner side of the silicon oxide-coated PET film layer 1 is coated with an ink layer 7, which is a water-based ink. The inner side of the multilayer co-extruded PE film layer 2 is coated with an antibacterial coating 8, which is a mixture of ginger essential oil, lemon essence, and oil agar.

[0042] In this embodiment, the PET film 102 of the silicon oxide PET film layer 1 has a thickness of 14 μm, the silicon oxide layer 101 has a thickness of 0.18 μm, and the vacuum degree of the vacuum evaporation process is 10. -4 Pa.

[0043] In this embodiment, the PET film layer 3 has a thickness of 14 μm, the nylon film layer 4 has a thickness of 18 μm, and the multilayer co-extruded PE film layer 2 has a thickness of 90 μm.

[0044] In this embodiment, the thickness of the environmentally friendly adhesive layer 5 is 2μm, the thickness of the matte ink layer 6 and the ink layer 7 is 2μm, and the thickness of the antibacterial coating 8 is 5μm.

[0045] The multilayer composite film preparation process in this embodiment:

[0046] (1) Preparation of double-sided printed silicon oxide PET film: First, a vacuum of 10 -4 Pa's vacuum evaporation process deposits a 0.18 μm thick silicon oxide layer on the inner side of a 14 μm thick PET film, forming a 14.18 μm thick silicon oxide-coated PET film layer. Then, a 2 μm thick ink layer is first printed on the inner side of the silicon oxide-coated PET film layer, and then a 2 μm thick matte ink layer is printed on the outer side of the silicon oxide-coated PET film layer, to prepare a double-sided printed silicon oxide-coated PET film layer with a thickness of 18.18 μm.

[0047] (2) Composite of multilayer films: First, use environmentally friendly adhesive to composite the above-mentioned double-sided printed silicon oxide coated PET film layer with another PET film with a thickness of 14μm to form a 34.18μm double-sided printed silicon oxide coated PET / PET composite film. Then, use environmentally friendly adhesive to composite the double-sided printed silicon oxide coated PET-PET composite film with a thickness of 18μm nylon film to form a 54.18μm double-sided printed silicon oxide coated PET-PET-nylon composite film. Then, use environmentally friendly adhesive to composite the double-sided printed silicon oxide coated PET / PET / nylon composite film with a thickness of 90μm multilayer co-extruded PE to form a 146.18μm double-sided printed silicon oxide coated PET / PET / nylon / multilayer co-extruded PE composite film.

[0048] (3) Formation of multilayer composite film: A 5μm thick mixture of ginger essential oil-lemon essential oil-oil agar is coated on the inner side of the double-sided printed silicon oxide PET / PET / nylon / multilayer co-extruded PE composite film to form the multilayer composite film of this embodiment.

[0049] Table 1 below shows the performance test results of the multilayer composite films in Examples 1-3.

[0050] Table 1 Performance test results of the multilayer composite films in Examples 1-3

[0051]

[0052] As can be seen from the table above, the water vapor permeability and oxygen permeability of the multilayer composite membranes in Examples 1-3 are all less than 0.5, and are positively correlated with the thickness of the silicon oxide layer. This indicates that the multilayer composite membranes prepared by this invention all have excellent barrier properties. According to the formula relating antibacterial rate (A) to antibacterial performance value (R)... The antibacterial performance values ​​in the table above can be used to calculate the corresponding antibacterial rates. The antibacterial rates against Staphylococcus aureus in Examples 1-3 are 95.0%, 93.3%, and 98.7%, respectively, and the antibacterial rates against Escherichia coli in Examples 1-3 are 68.3%, 57.1%, and 72.9%, respectively. This indicates that the multilayer composite membrane prepared by this invention has good antibacterial performance against Staphylococcus aureus and certain antibacterial performance against Escherichia coli.

[0053] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multilayer composite film, characterized in that, The film includes a silica-coated PET film layer (1) and a multilayer co-extruded PE film layer (2). A nylon film layer (4) is provided between the silica-coated PET film layer (1) and the multilayer co-extruded PE film layer (2). The silica-coated PET film layer (1) is a PET film (102) with a silica layer (101) deposited on its inner side by a vacuum evaporation process. The silica-coated PET film layer (1) has a matte ink layer (6) coated on its outer side and an ink layer (7) coated on its inner side. The nylon film layer (4) is bonded to the outer side of the multilayer co-extruded PE film layer (2) by an environmentally friendly adhesive layer (5). The multilayer co-extruded PE film layer (2) has an antibacterial coating (8) coated on its inner side. The antibacterial coating (8) is a mixture of ginger essential oil and agar, a mixture of lemon essential oil and agar, or a mixture of ginger essential oil, lemon essential oil, and agar.

2. The multilayer composite film according to claim 1, characterized in that, The PET film (102) of the silicon oxide plated PET film layer (1) has a thickness of 12-15 μm, the silicon oxide layer has a thickness of not more than 0.2 μm, and the vacuum degree of the vacuum evaporation process is 10 - 4 Pa.

3. The multilayer composite film according to claim 1, characterized in that, The thickness of the nylon film layer (4) is 15-20 μm, and the thickness of the multilayer co-extruded PE film layer (2) is 50-120 μm.

4. The multilayer composite film according to claim 1, characterized in that, A PET film layer (3) is provided between the silicon oxide PET film layer (1) and the multilayer co-extruded PE film layer (2). The PET film layer (3) is bonded between the silicon oxide PET film layer (1) and the nylon film layer (4) by an environmentally friendly adhesive layer (5). The thickness of the PET film layer (3) is 12-15 μm.

5. A multilayer composite film according to claim 1, characterized in that, The environmentally friendly adhesive layer (5) is an adhesive that does not contain benzene, toluene, ethylbenzene and xylene, and the thickness of the environmentally friendly adhesive layer (5) is 2-3 μm.

6. The multilayer composite film according to claim 1, characterized in that, The thickness of both the matte ink layer (6) and the ink layer (7) is 2-4 μm.

7. A multilayer composite film according to claim 1, characterized in that, The thickness of the antibacterial coating (8) is 3-6 μm.

8. A multilayer composite film according to claim 1, characterized in that, The total thickness of the multilayer composite film is 100-160 μm.

9. A multilayer composite film according to claim 1, characterized in that, The ink layer (7) is water-based ink or non-water-based ink.

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