Cold-resistant and impact-resistant retort pouch

Abstract

The utility model discloses a cold-resistant shock-resistant retort pouch which comprises a composite film, the composite film is matched together to form a pouch body, and the composite film comprises a PET (polyethylene terephthalate) film layer, a first asynchronous stretching double-sided corona nylon film layer, a second asynchronous stretching double-sided corona nylon film layer, a polyethylene lamination layer and a polyethylene film layer, the polyethylene film layer is arranged between the PET film layer and the polyethylene film layer, the first asynchronous stretching double-sided corona nylon film layer is arranged between the PET film layer and the polyethylene film layer, and the second asynchronous stretching double-sided corona nylon film layer is arranged between the polyethylene film layer and the polyethylene film layer. The composite film is formed by compounding the PET film layer, the first asynchronous stretching double-sided corona nylon film layer, the second asynchronous stretching double-sided corona nylon film layer, the polyethylene spraying film layer and the polyethylene film layer, and after the composite film is prepared into the retort pouch, the whole retort pouch still has good sealing performance and good impact resistance at low temperature.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of packaging material especially relates to a cold -resisting and impact -resisting steaming bag. BACKGROUND

[0002] The steaming bag is a kind of common packaging material, and the structure of the film during preparation of the commonly used steaming bag is shown in the patent publication CN117183515A, the film shown in the structure is three-layer polypropylene composite material, and the polypropylene film material has relatively poor cold resistance and impact resistance, so the steaming bag prepared by the composite film of the structure has poor use performance in some low-temperature environment, and the steaming bag is more likely to be broken when impacted. SUMMARY

[0003] The utility model provides a kind of cold -resisting and impact -resisting steaming bag for the above problems, composite film adopts PET film layer, first asynchronous stretch double-sided corona nylon film layer, second asynchronous stretch double-sided corona nylon film layer, polyethylene film layer and polyethylene film layer composite, after composite film is prepared into steaming bag, entire steaming bag still has good sealing performance under low temperature, and good impact resistance.

[0004] The technical scheme adopted by the utility model is as follows:

[0005] A kind of cold -resisting and impact -resisting steaming bag, including composite film, the composite film is cooperated together to form bag body, the composite film includes PET film layer, first asynchronous stretch double-sided corona nylon film layer, second asynchronous stretch double-sided corona nylon film layer, polyethylene film layer and polyethylene film layer, the polyethylene film layer is set between PET film layer and polyethylene film layer, the first asynchronous stretch double-sided corona nylon film layer is set between PET film layer and polyethylene film layer, the second asynchronous stretch double-sided corona nylon film layer is set between polyethylene film layer and polyethylene film layer.

[0006] In the composite film for preparing the steaming bag, PET film layer, first asynchronous stretch double-sided corona nylon film layer, second asynchronous stretch double-sided corona nylon film layer, polyethylene film layer and polyethylene film layer are compounded, polyethylene film layer is used as the heat bonding surface of whole composite film, and two composite films are bonded together to form bag body by heat bonding surface.

[0007] The composite film contains a polyethylene film layer and a polyethylene film layer, and the polyethylene material can still maintain good performance at low temperature relative to polypropylene, which can ensure that the entire retort bag still has good sealing performance at low temperature. Meanwhile, the composite film contains a first asynchronous stretched double-sided corona nylon film layer and a second asynchronous stretched double-sided corona nylon film layer, and the asynchronous stretched double-sided corona nylon film layer has better tensile strength, so the entire film has better tensile strength, and the entire composite film has better impact resistance.

[0008] In summary, the composite film uses a PET film layer, a first asynchronous stretched double-sided corona nylon film layer, a second asynchronous stretched double-sided corona nylon film layer, a polyethylene film layer, and a polyethylene film layer, and after the composite film is prepared into a retort bag, the entire retort bag still has good sealing performance at low temperature and good impact resistance.

[0009] Optionally, it also includes a first adhesive layer and a second adhesive layer, the first adhesive layer is arranged between the PET film layer and the first asynchronous stretched double-sided corona nylon film layer, and the second adhesive layer is arranged between the second asynchronous stretched double-sided corona nylon film layer and the polyethylene film layer.

[0010] The first adhesive layer and the second adhesive layer have a bonding effect. The thickness of the first adhesive layer and the second adhesive layer is 3um.

[0011] Optionally, it also includes a primer layer, which is arranged between the second adhesive layer and the second asynchronous stretched double-sided corona nylon film layer.

[0012] Optionally, it also includes an ink printing layer, which is arranged between the first adhesive layer and the PET film layer.

[0013] Specifically, the ink printing layer is a coating layer formed by ink printing on the PET film layer and curing, and the thickness of the ink printing layer is 2um, and the thickness of the PET film layer is 12um.

[0014] Optionally, the thickness of the first asynchronous stretched double-sided corona nylon film layer is 15um, and the thickness of the second asynchronous stretched double-sided corona nylon film layer is 20um.

[0015] Optionally, the thickness of the polyethylene film layer is 20um.

[0016] Optionally, the thickness of the polyethylene film layer is 80um.

[0017] The utility model discloses beneficial effect is: composite film adopts PET film layer, first asynchronous stretching double -sided corona nylon film layer, second asynchronous stretching double -sided corona nylon film layer, polyethylene film layer and polyethylene film layer compound, and after the composite film preparation becomes the steaming bag, whole steaming bag still has good sealing performance under low temperature, and good impact resistance. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments described in the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings.

[0019] Figure 1 It is the structural schematic diagram of composite film;

[0020] The various reference signs in the drawings are: 1, PET film layer; 2, ink printing layer; 3, first adhesive layer; 4, first asynchronous stretching double -sided corona nylon film layer; 5, polyethylene film layer; 6, primer layer; 7, second asynchronous stretching double -sided corona nylon film layer; 8, second adhesive layer; 9, polyethylene film layer. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned purpose, features and advantages of the utility model more apparent and easy to understand, the specific implementation of the utility model will be described in detail below with the drawings.

[0022] In the following description, a lot of specific details are set forth in order to fully understand the utility model, but the utility model can also be implemented in other ways different from the description herein, and those skilled in the art can make similar generalization without departing from the connotation of the utility model, therefore the utility model is not limited by the specific implementation disclosed below.

[0023] In the description of the present application, it should be noted that the terms used herein are only for describing the specific implementation, and are not intended to limit the example embodiments according to the present application. In order to facilitate the description, the size of each part shown in the drawings is not drawn according to the actual proportion relationship. The technology, method and equipment known to those skilled in the related art can not be discussed in detail, but under appropriate circumstances, the technology, method and equipment should be regarded as part of the authorized specification. In all examples shown and discussed here, any specific value should be interpreted as only exemplary, and not as a limitation. Therefore, other examples of example embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings.

[0024] A cold-resistant and impact-resistant retort pouch comprising a composite film as shown in the accompanying drawings, the composite film is combined together to form a pouch body, the composite film comprises a PET film layer 1, a first asynchronous stretched double-sided corona nylon film layer 4, a second asynchronous stretched double-sided corona nylon film layer 7, a polyethylene lamination film layer 5 and a polyethylene film layer 9, the polyethylene lamination film layer 5 is arranged between the PET film layer 1 and the polyethylene film layer 9, the first asynchronous stretched double-sided corona nylon film layer 4 is arranged between the PET film layer 1 and the polyethylene lamination film layer 5, and the second asynchronous stretched double-sided corona nylon film layer 7 is arranged between the polyethylene lamination film layer 5 and the polyethylene film layer 9. Figure 1

[0025] In the preparation of the composite film of the retort pouch, the PET film layer 1, the first asynchronous stretched double-sided corona nylon film layer 4, the second asynchronous stretched double-sided corona nylon film layer 7, the polyethylene lamination film layer 5 and the polyethylene film layer 9 are combined, and the polyethylene film layer 9 is used as a heat bonding surface of the whole composite film, and two composite films are bonded together through the heat bonding surface to form a pouch body.

[0026] The composite film contains the polyethylene lamination film layer 5 and the polyethylene film layer 9, and the polyethylene material can still maintain good performance at low temperature, which can ensure that the whole retort pouch still has good sealing performance at low temperature. Meanwhile, the composite film contains the first asynchronous stretched double-sided corona nylon film layer 4 and the second asynchronous stretched double-sided corona nylon film layer 7, and the asynchronous stretched double-sided corona nylon film layer has better tensile strength, so that the whole film has better tensile strength, and the whole composite film has better impact resistance.

[0027] In summary, the composite film is prepared by combining the PET film layer 1, the first asynchronous stretched double-sided corona nylon film layer 4, the second asynchronous stretched double-sided corona nylon film layer 7, the polyethylene lamination film layer 5 and the polyethylene film layer 9, and after the composite film is prepared into a retort pouch, the whole retort pouch still has good sealing performance and good impact resistance at low temperature.

[0028] The polyethylene lamination film layer 5 is made of SP1071C polyethylene lamination film of Prima Company, and the polyethylene contains metallocene.

[0029] As shown in the accompanying drawings, it further comprises a first adhesive layer 3 and a second adhesive layer 8, the first adhesive layer 3 is arranged between the PET film layer 1 and the first asynchronous stretched double-sided corona nylon film layer 4, and the second adhesive layer 8 is arranged between the second asynchronous stretched double-sided corona nylon film layer 7 and the polyethylene film layer 9. Figure 1

[0030] ​​Specifically, the adhesive used in the first adhesive layer 3 and the second adhesive layer 8 is Henkel LA2770 adhesive, which still has good bonding strength at low temperatures.

[0031] The function of the first adhesive layer 3 and the second adhesive layer 8 is to provide adhesion. Specifically, the thickness of both the first adhesive layer 3 and the second adhesive layer 8 is 3µm.

[0032] As attached Figure 1 As shown, it also includes a primer layer 6, which is disposed between the second adhesive layer 8 and the second asynchronous stretched double-sided corona nylon film layer 7.

[0033] As attached Figure 1 As shown, it also includes an ink printing layer 2, which is disposed between the first adhesive layer 3 and the PET film layer 1.

[0034] Specifically, ink printing layer 2 is a coating formed by ink printing on PET film layer 1 and curing. The thickness of ink printing layer 2 is 2um, and the thickness of PET film layer 1 is 12um.

[0035] As attached Figure 1 As shown, the thickness of the first asynchronous stretched double-sided corona-electrode nylon film layer 4 is 15 μm, and the thickness of the second asynchronous stretched double-sided corona-electrode nylon film layer 7 is 20 μm.

[0036] As attached Figure 1 As shown, the thickness of the polyethylene coating layer 5 is 20 μm.

[0037] As attached Figure 1 As shown, the thickness of the polyethylene film layer 9 is 80 μm.

[0038] 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 cold-resistant and impact-resistant retort pouch comprising a composite film which are fitted together to form a pouch body, characterized by, The composite film comprises a PET film layer, a first asynchronous stretched double-sided corona nylon film layer, a second asynchronous stretched double-sided corona nylon film layer, a polyethylene lamination film layer and a polyethylene film layer, the polyethylene lamination film layer is arranged between the PET film layer and the polyethylene film layer, the first asynchronous stretched double-sided corona nylon film layer is arranged between the PET film layer and the polyethylene lamination film layer, and the second asynchronous stretched double-sided corona nylon film layer is arranged between the polyethylene lamination film layer and the polyethylene film layer.

2. The cold-resistant and impact-resistant retort pouch according to claim 1, characterized by, The composite film further comprises a first adhesive layer and a second adhesive layer, the first adhesive layer is arranged between the PET film layer and the first asynchronous stretched double-sided corona nylon film layer, and the second adhesive layer is arranged between the second asynchronous stretched double-sided corona nylon film layer and the polyethylene film layer.

3. The cold-resistant and impact-resistant retort pouch according to claim 2, characterized by The composite film further comprises a primer layer, the primer layer is arranged between the second adhesive layer and the second asynchronous stretched double-sided corona nylon film layer.

4. The cold-resistant and impact-resistant retort pouch according to claim 2, characterized by The composite film further comprises an ink printing layer, the ink printing layer is arranged between the first adhesive layer and the PET film layer.

5. The cold-resistant and impact-resistant retort pouch according to claim 1, characterized by, The thickness of the first asynchronous stretched double-sided corona nylon film layer is 15 um, and the thickness of the second asynchronous stretched double-sided corona nylon film layer is 20 um.

6. The cold-resistant and impact-resistant retort bag according to claim 5, wherein, The thickness of the polyethylene lamination film layer is 20 um.

7. The cold-resistant and impact-resistant retort bag according to claim 5, wherein The thickness of the polyethylene film layer is 80 um.

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