An easy-tear aluminum-plastic composite film and an easy-tear packaging bag

Abstract

The utility model provides an easy tear aluminium plastic composite film and easy tear packing bag, easy tear aluminium plastic composite film includes composite film body, through setting up easy tear strip in the middle heat -seal layer of composite film body and the side surface of aluminium foil barrier layer far apart one side, in the process of making bag, can expose at least one end of easy tear strip, when using, can tear open an opening from the back seal of packing bag through pulling exposed easy tear strip one end to open the packing, both ensure the high barrier property of aluminium plastic composite film, also can not influence the appearance of aluminium plastic composite film, realizes easy tear's effect simultaneously.

Description

Technical Field

[0001] This utility model belongs to the field of composite film technology, specifically relating to an easy-tear aluminum-plastic composite film and an easy-tear packaging bag. Background Technology

[0002] As people's living standards continue to improve, the application of flexible packaging composite film products is becoming increasingly widespread. To facilitate consumer use, many easy-tear structures have been designed, including laser-tear and paper-die-cut easy-tear types available on the market. However, both of these methods have their limitations. Laser-tear packaging may damage the composite film, reducing its barrier properties, while paper-die-cut easy-tear packaging may damage the paper surface, thus affecting the appearance of the packaging bag.

[0003] Therefore, it is still very important to develop an easy-tear aluminum-plastic composite film that does not affect the barrier properties of the composite film and the appearance of the packaging bag, while achieving an easy-tear effect, in order to address the above-mentioned technical problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide an easy-tear aluminum-plastic composite film and an easy-tear packaging bag. The easy-tear aluminum-plastic composite film has an easy-tear strip on its inner surface. During the bag-making process, at least one end of the easy-tear strip is exposed. By pulling the exposed easy-tear strip, an opening can be torn from the back seal of the packaging bag to open the packaging. This ensures the high barrier properties of the aluminum-plastic composite film without affecting the appearance of the packaging bag, while also achieving an easy-tear effect.

[0005] To achieve the objective of this utility model, the following technical solution is adopted: In a first aspect, this utility model provides an easy-tear aluminum-plastic composite film, which includes a composite film body and an easy-tear strip; The composite membrane body includes two opposing first edges and two opposing second edges; The composite film body includes a PET outer layer, an LDPE intermediate layer, an aluminum foil barrier layer, and a heat-sealing layer stacked from the outside to the inside. The easy-tear strip is disposed on the surface of the heat-sealing layer of the composite film body away from the aluminum foil barrier layer, and at least one end of the easy-tear strip extends beyond the second edge of the composite film body.

[0006] Preferably, the tear strip is elongated, and the long side of the tear strip is parallel to the first edge of the aluminum-plastic composite film body.

[0007] Preferably, the width of the tear strip is 5 to 10 mm, such as 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm.

[0008] Preferably, the length of the tear strip extending from the second edge of the composite film body is 5 to 10 mm, such as 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm.

[0009] Preferably, the tear strip is a PET film.

[0010] Preferably, the thickness of the PET film is 10~15 μm, such as 10 μm, 11 μm, 12 μm, 13 μm, 14 μm or 15 μm.

[0011] Preferably, the tear strip is attached to the surface of the heat-sealing layer away from the aluminum foil barrier layer via an adhesive layer.

[0012] Preferably, the adhesive layer is made of polyurethane adhesive.

[0013] Preferably, the thickness of the PET outer layer is 10~15 μm, such as 10 μm, 11 μm, 12 μm, 13 μm, 14 μm or 15 μm.

[0014] Preferably, the thickness of the LDPE interlayer is 15~20 μm, such as 15 μm, 16 μm, 17 μm, 18 μm, 19 μm or 20 μm.

[0015] Preferably, the thickness of the aluminum foil barrier layer is 7~9 μm, such as 7 μm, 7.5 μm, 8 μm, 8.5 μm or 9 μm.

[0016] Preferably, the thickness of the heat-sealing layer (114) is 30~50 μm, for example 30 μm, 35 μm, 40 μm, 45 μm or 50 μm.

[0017] Secondly, this utility model provides an easy-tear packaging bag, which includes the easy-tear aluminum-plastic composite film as described in the first aspect. Compared with the prior art, the present invention has the following beneficial effects: The easy-tear aluminum-plastic composite film provided by this utility model includes a composite film body. An easy-tear strip is provided on the surface of the heat-sealing layer away from the aluminum foil barrier layer in the composite film body. During the bag making process, at least one end of the easy-tear strip can be exposed at the edge of the composite film body. When in use, by pulling the exposed easy-tear strip, an opening can be torn from the back seal of the packaging bag to open the packaging. This ensures the high barrier properties of the aluminum-plastic composite film without affecting the appearance of the packaging bag, while achieving the easy-tear effect. Attached Figure Description

[0018] Figure 1 A schematic diagram of the planar structure of the easy-tear aluminum-plastic composite film provided for the first specific embodiment of this utility model; Figure 2 A cross-sectional structural diagram of the easy-tear aluminum-plastic composite film provided for the first specific embodiment of this utility model; Figure 3 A schematic diagram of the planar structure of the easy-tear aluminum-plastic composite film provided for the second specific embodiment of this utility model; Figure 4 A schematic diagram of the planar structure of the easy-tear aluminum-plastic composite film provided for the third specific embodiment of this utility model; Figure 5 A schematic diagram of the back structure of the easy-tear packaging bag provided by this utility model; Among them, 1-composite film body, 101-first edge, 102-second edge, 111-PET outer layer, 112-LDPE intermediate layer, 113-aluminum foil barrier layer, 114-heat seal layer, 2-easy tear strip, 3-adhesive layer, 4-horizontal seal, 5-longitudinal seal. Detailed Implementation

[0019] The technical solution of this utility model will be further described below through specific embodiments. Those skilled in the art should understand that the embodiments described are merely illustrative of this utility model and should not be considered as specific limitations thereof.

[0020] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific implementation should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having” and any variations thereof are intended to cover non-exclusive inclusion.

[0022] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0023] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0024] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0025] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", "height direction", "first direction", "second direction", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0026] The first specific embodiment of this utility model provides an easy-tear aluminum-plastic composite film, such as... Figure 1 and Figure 2 As shown, the easy-tear aluminum-plastic composite film includes a composite film body 1 and an easy-tear strip 2. The composite film body 1 includes two opposing first edges 101 and two opposing second edges 102. The composite film body 1 includes a PET outer layer (111), an LDPE intermediate layer (112), an aluminum foil barrier layer (113), and a heat-sealing layer (114) stacked from the outside to the inside. The easy-tear strip 2 is disposed on the surface of the heat-sealing layer 114 in the composite film body 1 away from the aluminum foil barrier layer 113, and one end of the easy-tear strip 2 extends out of the second edge 102 of the composite film body 1, and the other end of the easy-tear strip 2 is aligned with the other second edge 102 of the composite film body 1.

[0027] During the heat-sealing process of the easy-tear aluminum-plastic composite film provided in the first specific embodiment of this utility model, since one end of the easy-tear strip 2 extends beyond the second edge 102 of the composite film body 1, the part of the easy-tear strip 2 that does not extend beyond the second edge 102 of the composite film body 1 will be heat-sealed inside the bag by the heat-sealing layer 114, while the part of the easy-tear strip 2 that extends beyond the second edge 102 of the aluminum-plastic composite film body 1 will be exposed outside the bag. When consumers use the finished packaging bag, they can open the packaging by pulling open the exposed part of the easy-tear strip 2 and tearing an opening at the back seal of the packaging bag. This not only ensures the barrier properties of the aluminum-plastic composite film, but also does not affect the appearance of the aluminum-plastic composite film and the packaging bag, and achieves the effect of easy tearing.

[0028] It should be noted that, in this utility model, the composite film body 1 includes the surface from the outside to the inside, which refers to the surface from the side away from the contents to the side close to the contents after it is made into a packaging bag. If the following uses the same or similar expressions, they all have the same meaning and will not be repeated one by one.

[0029] In some preferred embodiments, the easy-tear strip 2 is elongated, and the long side of the easy-tear strip 2 is parallel to the first edge 101 of the composite film body 1.

[0030] In some preferred embodiments, the width h of the easy-tear strip 2 is 5~10 mm; within this width range, it is easier for consumers to grasp the easy-tear strip 2 and pull it, thereby making it easier to tear open the packaging.

[0031] In some preferred embodiments, the length d of the tear strip 2 extending from the second edge 102 of the composite film body 1 is 5 to 10 mm. Within this length range, it is easier for consumers to grasp the tear strip 2 and pull it, thereby making it easier to tear open the packaging.

[0032] In some preferred embodiments, the tear strip 2 is a polyethylene terephthalate (PET) film, and the PET film is an existing material.

[0033] In some preferred embodiments, the thickness of the PET film is 10~15 μm.

[0034] In some preferred embodiments, the tear strip 2 is attached to the surface of the heat-sealing layer 114 away from the aluminum foil barrier layer 113 by an adhesive layer 3.

[0035] In some preferred embodiments, the adhesive layer 3 is made of polyurethane adhesive, for example, a two-component polyurethane adhesive, and the two-component polyurethane adhesive is an existing material.

[0036] In this invention, there is no special limitation on the thickness of the adhesive layer 3, as long as the easy-tear strip 2 can be firmly bonded to the composite film body 1.

[0037] In some preferred embodiments, the thickness of the PET outer layer 111 is 10~15 μm.

[0038] In this invention, in order to further improve the tearability of the easy-tear aluminum-plastic composite film, polyethylene terephthalate (PET) film treated with easy tearing can be used as the outer layer of PET, and the easy-tear treated PET film is an existing material.

[0039] In some preferred embodiments, the thickness of the LDPE interlayer 112 is 15~20 μm.

[0040] In this invention, the LDPE interlayer is made of low-density polyethylene (LDPE), and the LDPE is an existing material.

[0041] In some preferred embodiments, the thickness of the aluminum foil barrier layer 113 is 7~9 μm.

[0042] In some preferred embodiments, the thickness of the heat-sealing layer 114 is 30~50 μm.

[0043] In this invention, the heat-sealing layer 114 is a co-extruded film of low-density polyethylene and polyolefin elastomer, and the co-extruded film is also an existing material.

[0044] The second specific embodiment of this utility model also provides an easy-tear aluminum-plastic composite film, such as... Figure 3 As shown, the only difference between this embodiment and the first specific embodiment is that both ends of the tear strip 2 extend beyond the second edge 102 of the aluminum-plastic composite film body 1.

[0045] The third specific embodiment of this utility model also provides an easy-tear aluminum-plastic composite film, such as... Figure 4 As shown, the only difference between this embodiment and the first specific embodiment is that one end of the easy-tear strip 2 extends beyond the second edge 102 of the aluminum-plastic composite film body 1, while the other end does not reach the other second edge 102 of the aluminum-plastic composite film body 1.

[0046] Similarly, during the heat-sealing process of the easy-tear aluminum-plastic composite film provided in the second and third embodiments of this utility model, the resulting packaging bag also has an exposed easy-tear strip 2. When using the packaged bag, by pulling open the exposed easy-tear strip 2, an opening can be torn at the back seal of the packaging bag to open the packaging. This ensures the barrier properties of the aluminum-plastic composite film without affecting its appearance, and also achieves the easy-tear effect.

[0047] The third embodiment of this utility model provides an easy-tear packaging bag, which includes the easy-tear aluminum-plastic composite film provided in the first, second, or third embodiment of this utility model, such as... Figure 5 As shown, the easy-tear packaging bag includes two horizontal seals 4, one vertical seal 5, and an exposed easy-tear strip 2 arranged opposite to each other. The two horizontal seals 4 are formed by heat sealing the two first edges 101 of the composite film body in the easy-tear aluminum-plastic composite film, and the one vertical seal 5 is formed by heat sealing the two second edges 102 of the composite film body in the easy-tear aluminum-plastic composite film. When using the easy-tear packaging bag, the easy-tear effect can be achieved by pulling open the exposed easy-tear strip 2.

[0048] Furthermore, this utility model does not impose special limitations on the preparation process of the provided easy-tear aluminum-plastic composite film and easy-tear packaging bag. For example, they can be prepared according to the following method: First, the PET outer layer 111, the LDPE intermediate layer 112, the aluminum foil barrier layer 113 and the heat-sealing layer 114 are sequentially laminated to obtain the composite film body 1; Then, the easy-tear strip 2 is attached to the surface of the heat-sealing layer 114 away from the aluminum foil barrier layer 113 by the adhesive layer 3, and an easy-tear aluminum-plastic composite film is obtained. Finally, the obtained easy-tear aluminum-plastic composite film is heat-sealed. During the heat-sealing process, a portion of the easy-tear strip 2 is heat-sealed inside the packaging bag, while the other portion is exposed outside the bag, thus obtaining the easy-tear packaging bag.

[0049] The applicant declares that this utility model illustrates an easy-tear aluminum-plastic composite film and an easy-tear packaging bag through the above embodiments. However, the protection scope of this utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model fall within the protection and disclosure scope of this utility model.

Claims

1. An easy-tear aluminum-plastic composite film, characterized in that, The easy-tear aluminum-plastic composite film includes a composite film body (1) and an easy-tear strip (2). The composite membrane body (1) includes two opposing first edges (101) and two opposing second edges (102). The composite film body (1) includes a PET outer layer (111), an LDPE intermediate layer (112), an aluminum foil barrier layer (113), and a heat-sealing layer (114) stacked from the outside to the inside. The easy-tear strip (2) is disposed on the side surface of the heat-sealing layer (114) of the composite film body (1) away from the aluminum foil barrier layer (113), and at least one end of the easy-tear strip (2) extends out of the second edge (102) of the aluminum-plastic composite film body (1).

2. The easy-tear aluminum-plastic composite film according to claim 1, characterized in that, The easy-tear strip (2) is long and the long side of the easy-tear strip (2) is parallel to the first edge (101) of the composite film body (1).

3. The easy-tear aluminum-plastic composite film according to claim 2, characterized in that, The width of the tear strip (2) is 5~10mm.

4. The easy-tear aluminum-plastic composite film according to claim 1, characterized in that, The length of the tear strip (2) extending from the second edge (102) of the composite membrane body (1) is 5~10 mm.

5. The easy-tear aluminum-plastic composite film according to any one of claims 1 to 4, characterized in that, The tear strip (2) is a PET film.

6. The easy-tear aluminum-plastic composite film according to claim 5, characterized in that, The thickness of the PET film is 10~15 μm.

7. The easy-tear aluminum-plastic composite film according to claim 1, characterized in that, The tear strip (2) is attached to the side surface of the heat-sealing layer (114) away from the aluminum foil barrier layer (113) by an adhesive layer (3).

8. The easy-tear aluminum-plastic composite film according to claim 7, characterized in that, The adhesive layer (3) is made of polyurethane adhesive.

9. The easy-tear aluminum-plastic composite film according to claim 1, characterized in that, The thickness of the PET outer layer (111) is 10~15 μm; And / or, the thickness of the LDPE intermediate layer (112) is 15~20 μm; And / or, the thickness of the aluminum foil barrier layer (113) is 7~9 μm; And / or, the thickness of the heat-sealing layer (114) is 30~50 μm.

10. An easy-tear packaging bag, characterized in that, The easy-tear packaging bag includes the easy-tear aluminum-plastic composite film as described in any one of claims 1 to 9.

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