Acidic content packaging bag

Abstract

The utility model discloses an acid content packing bag, including soft package composite membrane, the soft package composite membrane cooperation forms the bag body together, the soft package composite membrane includes aluminium foil layer, PET film layer, EAA resin membrane layer and PE film layer, the PET film layer with PE film layer sets up respectively in the both sides of aluminium foil layer, EAA resin membrane layer sets up between aluminium foil layer and PE film layer, EAA resin membrane layer one side close tightly PE film layer, EAA resin membrane layer's other side close tightly aluminium foil layer, the bag mouth on the bag body is provided with the outlet runner, the outlet runner is right angle trapezoidal shape. This kind of packing bag has following beneficial effect: adopt PE film layer and contact with acid content, adopt EAA resin membrane layer to connect aluminium foil layer and PE film layer, can avoid aluminium foil layer and PE film layer and appear delamination because of packing acid content.

Description

Technical Field

[0001] This utility model relates to the field of packaging products, and in particular to a packaging bag for acidic contents. Background Technology

[0002] Currently, many items are packaged using flexible film. The structure of the flexible film currently used is shown in patent publication document CN207225990U. In this structure, the flexible film has PE film on both sides and aluminum foil in the middle. The PE film and aluminum foil are bonded together with adhesive. This type of flexible film has a problem when packaging acidic contents, namely, the acidic contents will destroy the adhesive, causing the PE film and aluminum foil to separate, thus affecting the packaging effect. Utility Model Content

[0003] To address the aforementioned problems, this invention proposes a packaging bag for acidic contents. A PE film layer is used to contact the acidic contents, and an EAA resin coating layer is used to connect the aluminum foil layer and the PE film layer. This can prevent the aluminum foil layer and the PE film layer from delaminating due to the packaging of acidic contents.

[0004] The technical solution adopted by this utility model is as follows:

[0005] An acidic contents packaging bag includes a flexible composite film, which are joined together to form a bag body. The flexible composite film includes an aluminum foil layer, a PET film layer, an EAA resin coating layer, and a PE film layer. The PET film layer and the PE film layer are respectively disposed on both sides of the aluminum foil layer. The EAA resin coating layer is disposed between the aluminum foil layer and the PE film layer. One side of the EAA resin coating layer is tightly attached to the PE film layer, and the other side of the EAA resin coating layer is tightly attached to the aluminum foil layer. An outlet channel is provided at the bag opening on the bag body, and the outlet channel is in the shape of a right-angled trapezoid.

[0006] Specifically, in this type of acidic contents packaging bag, the bag opening is closed, while the bottom of the bag is open before the contents are filled. After the contents are filled, the bottom of the bag is sealed, thus completing the sealing of the entire packaging bag. When it is necessary to remove the acidic contents from the packaging bag, simply open the bag opening and pour the contents out along the opening channel. This ensures that the acidic contents can be poured out steadily along the outlet channel.

[0007] In the preparation of the flexible composite film for this type of packaging bag, a PE film layer is used to contact the acidic contents. During packaging, the PE film layer comes into contact with the acidic contents. Since the PE film layer and the AL film layer are bonded together by an EAA resin coating layer, and EAA (ethylene-acrylic acid copolymer) resin is an acidic copolymer with good adhesion strength to aluminum foil, the EAA resin coating layer can firmly bond the aluminum foil layer and the PE film layer together, ensuring that there is no delamination between the PE film and the aluminum foil.

[0008] In summary, this type of packaging bag uses a PE film layer in contact with the acidic contents and an EAA resin coating layer to connect the aluminum foil layer and the PE film layer, which can prevent the aluminum foil layer and the PE film layer from delaminating due to the packaging of acidic contents.

[0009] Optionally, it also includes an easy-tear opening, which is provided at the top of the bag body. There are two easy-tear openings, and the distance between the two easy-tear openings is equal to the width of the narrow end of the outlet channel.

[0010] The purpose of setting easy-tear openings is to make it easy to tear open the seal at the top of the bag. When two easy-tear openings are torn open, the material can be poured out of the bag. Because the easy-tear openings are set at the top of the bag, when the opening is torn open, the torn pieces still remain on the bag.

[0011] Optionally, it also includes a hanging hole, which is located at the top of the bag body, and the hanging hole and the easy-tear opening are located at both ends of the top of the bag body.

[0012] The purpose of the hanging hole is to make it easy to hang one end of the bag with a hook and then pour the acidic contents along the outlet channel.

[0013] Optionally, it may also include an outer resin coating layer, which is disposed between the PET film layer and the aluminum foil layer.

[0014] The outer resin coating layer serves to bond the aluminum foil layer and the PET layer.

[0015] Optionally, a polyurethane undercoating layer is also included, which is disposed between the outer resin coating layer and the PET film layer.

[0016] Optionally, it may also include an ink pattern layer disposed on the PET film layer and located between the PET film layer and the polyurethane base layer.

[0017] Specifically, the ink pattern layer consists of graphic information printed on the PET film layer. The ink pattern layer is located between the PET film layer and the polyurethane base layer, thus preventing it from being exposed and protecting it.

[0018] Optionally, the thickness of the PE film layer is 40 μm.

[0019] Optionally, the thickness of the EAA resin coating layer is 18 μm; the thickness of the aluminum foil is 7 μm; and the thickness of the PET film layer is 12 μm.

[0020] The beneficial effects of this utility model are: by using a PE film layer to contact the acidic contents and using an EAA resin coating layer to connect the aluminum foil layer and the PE film layer, the delamination of the aluminum foil layer and the PE film layer due to the packaging of acidic contents can be avoided. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a simplified structural diagram of a packaging bag for acidic contents;

[0023] Figure 2 This is a simplified structural diagram of a flexible composite film.

[0024] The labels in the figures are as follows: 101, PET film layer; 102, ink pattern layer; 103, polyurethane base coating layer; 104, outer resin coating layer; 105, aluminum foil layer; 106, EAA resin coating layer; 107, PE film layer; 1, flexible composite film; 11, heat-sealing area; 12, outlet flow channel; 13, easy-tear opening; 14, hanging hole. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0028] As attached Figure 1 and appendix Figure 2 As shown, an acidic contents packaging bag includes a flexible composite film 1, which is assembled to form a bag body. The flexible composite film 1 includes an aluminum foil layer 105, a PET film layer 101, an EAA resin coating layer 106, and a PE film layer 107. The PET film layer 101 and the PE film layer 107 are respectively disposed on both sides of the aluminum foil layer 105. The EAA resin coating layer 106 is disposed between the aluminum foil layer 105 and the PE film layer 107. One side of the EAA resin coating layer 106 is tightly attached to the PE film layer 107, and the other side of the EAA resin coating layer 106 is tightly attached to the aluminum foil layer 105. An outlet channel 12 is provided at the bag opening on the bag body. The outlet channel 12 is in the shape of a right-angled trapezoid.

[0029] Specifically, in this type of acidic contents packaging bag, the bag opening is closed, while the bottom of the bag is open before the contents are filled. After the contents are filled, the bottom of the bag is sealed, thus completing the sealing of the entire packaging bag. When it is necessary to remove the acidic contents from the packaging bag, simply open the bag opening and pour the contents out along the opening channel. This ensures that the acidic contents can be stably poured out along the outlet channel 12.

[0030] In the preparation of the flexible composite film 1 for this type of packaging bag, a PE film layer 107 is used to contact the acidic contents. During packaging, the PE film layer 107 comes into contact with the acidic contents. Since the PE film layer 107 and the AL film layer are bonded together by an EAA resin coating layer 106, and EAA (ethylene-acrylic acid copolymer) resin is an acidic copolymer with good adhesion strength to aluminum foil, the EAA resin coating layer 106 can firmly bond the aluminum foil layer 105 and the PE film layer 107 together, ensuring that there is no delamination between the PE film and the aluminum foil.

[0031] In summary, this type of packaging bag uses a PE film layer 107 to contact the acidic contents, and uses an EAA resin coating layer 106 to connect the aluminum foil layer 105 and the PE film layer 107, which can prevent the aluminum foil layer 105 and the PE film layer 107 from delaminating due to the packaging of acidic contents.

[0032] As attached Figure 1 and appendix Figure 2 As shown, it also includes an easy-tear opening 13, which is provided at the top of the bag body. There are two easy-tear openings 13, and the distance between the two easy-tear openings 13 is equal to the width of the narrow end of the outlet channel 12.

[0033] The purpose of setting the easy-tear opening 13 is to make it easy to tear open the seal at the top of the bag. When the two easy-tear openings 13 are torn open, the material can be poured out of the bag. Since the easy-tear opening 13 is set at the top of the bag, when the opening is torn open on the bag, the torn pieces still remain on the bag.

[0034] As attached Figure 1 and appendix Figure 2 As shown, it also includes a hanging hole 14, which is located at the top of the bag body, and the hanging hole 14 and the easy-tear opening 13 are located at the two ends of the top of the bag, respectively.

[0035] The purpose of providing the hanging hole 14 is to facilitate hanging one end of the bag with a hook and then pouring the acidic contents along the outlet channel 12.

[0036] As attached Figure 1 and appendix Figure 2 As shown, it also includes an outer resin coating layer 104, which is disposed between the PET film layer 101 and the aluminum foil layer 105.

[0037] The outer resin coating layer 104 serves to bond the aluminum foil layer 105 to the PET layer.

[0038] As attached Figure 1 and appendix Figure 2 As shown, it also includes a polyurethane base coating 103, which is disposed between the outer resin coating layer 104 and the PET film layer 101.

[0039] As attached Figure 1 and appendix Figure 2 As shown, it also includes an ink pattern layer 102, which is disposed on the PET film layer 101 and is located between the PET film layer 101 and the polyurethane base layer 103.

[0040] Specifically, the ink pattern layer 102 is the graphic information printed on the PET film layer 101. The ink pattern layer 102 is located between the PET film layer 101 and the polyurethane base layer 103, which can prevent the ink pattern layer 102 from being exposed, thereby protecting the ink pattern layer 102.

[0041] As attached Figure 1 and appendix Figure 2 As shown, the thickness of the PE film 107 is 40 μm.

[0042] As attached Figure 1 and appendix Figure 2 As shown, the thickness of the EAA resin coating layer 106 is 18 μm; the thickness of the aluminum foil is 7 μm; and the thickness of the PET film layer 101 is 12 μm.

[0043] The above-described embodiments only illustrate some aspects of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A packaging bag for acidic contents, comprising a flexible composite film, wherein the flexible composite film is assembled together to form a bag body, characterized in that, The flexible composite film includes an aluminum foil layer, a PET film layer, an EAA resin coating layer, and a PE film layer. The PET film layer and the PE film layer are respectively disposed on both sides of the aluminum foil layer. The EAA resin coating layer is disposed between the aluminum foil layer and the PE film layer. One side of the EAA resin coating layer is attached to the PE film layer, and the other side of the EAA resin coating layer is attached to the aluminum foil layer. An outlet channel is provided at the bag opening on the bag body, and the outlet channel is in the shape of a right-angled trapezoid.

2. The acidic contents packaging bag according to claim 1, characterized in that, It also includes an easy-tear opening, which is located at the top of the bag body. There are two easy-tear openings, and the distance between the two easy-tear openings is equal to the width of the narrow end of the outlet channel.

3. The acidic contents packaging bag according to claim 2, characterized in that, It also includes a hanging hole, which is located at the top of the bag body, and the hanging hole and the easy-tear opening are located at the two ends of the top of the bag, respectively.

4. The acidic contents packaging bag according to claim 1, characterized in that, It also includes an outer resin coating layer, which is disposed between the PET film layer and the aluminum foil layer.

5. The acidic contents packaging bag according to claim 4, characterized in that, It also includes a polyurethane base coating layer, which is disposed between the outer resin coating layer and the PET film layer.

6. The acidic contents packaging bag according to claim 5, characterized in that, It also includes an ink pattern layer disposed on the PET film layer and located between the PET film layer and the polyurethane base layer.

7. The acidic contents packaging bag according to claim 1, characterized in that, The thickness of the PE film is 40 μm.

8. The acidic contents packaging bag according to claim 7, characterized in that, The thickness of the EAA resin coating layer is 18 μm; the thickness of the aluminum foil is 7 μm; and the thickness of the PET film layer is 12 μm.

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