Double-layer double-sided adhesive tape matched with cotton packaging film and separable connecting structure

Abstract

The utility model relates to a double-layer double-sided adhesive tape matched with a cotton packaging film and a separable connecting structure. The double-layer double-sided adhesive tape comprises a first release film, a first hot melt adhesive film, a second hot melt adhesive film and a second release film. The packaging film has the advantages that the first blank position and the second blank position are reserved on the first release film, so that when the joint of the first packaging film and the joint of the second packaging film are separated, the attaching part of the first packaging film and the attaching part of the second packaging film are easy to separate; therefore, the situation that the joint position film is snapped and the joint is not separated due to the fact that the attaching part of the first packaging film and the second packaging film cannot be pulled open is avoided, and the packaging efficiency of the cotton packaging film is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of double-sided adhesive tapes, in particular to a double-layer double-sided adhesive tape for matching cotton packaging film and a detachable connection structure. Background Art

[0002] Currently, automated cotton pickers can collect and pack cotton while working. A roll film is installed on the drum of the cotton picker, and the roll film is divided into several packaging sections, each of which includes a non-sticky roll film section and a sticky roll film section.

[0003] A Chinese invention patent (CN110606276A) discloses a cotton packaging roll film, comprising a roll film substrate composed of multiple packaging segments connected end to end, wherein the packaging segments include a sticky area and a non-sticky area connected to the sticky area, and the sticky area of ​​the former packaging segment is connected to the non-sticky area of ​​the latter packaging segment at one end, which is a folded end bent in a "Z" shape. A separable adhesive structure is provided between the two end surfaces of the concave part of the folded end near the middle of the sticky area, and the separable adhesive structure includes a strong adhesive layer, a separable layer, and an adhesive layer. The strong adhesive layer and the adhesive layer are respectively located on the two end surfaces of the concave part of the folded end near the middle of the sticky area, and the separable layer is located between the strong adhesive layer and the adhesive layer; the boundary part of the sticky area of ​​the former packaging segment and the non-sticky area of ​​the latter packaging segment is provided with a tear line for separation during packaging. The detachable adhesive structure includes a strong adhesive layer, a detachable layer, and an adhesive layer. When the roll film is rolled on the reel, the detachable layer covers the adhesive layer to prevent different layers rolled on the reel from adhering to each other; but when the roll film is unwound and the cotton is packaged, the detachable layer will be peeled off from the adhesive layer and completely separated at the end of a packaging section cycle. The adhesive layer is used to adhere to the next layer of adhesive area for sealing at the end of the packaging section cycle; when a packaging section cycle ends, the reel stops rotating, and the packaged cotton will be torn apart by the tension generated by the rotational inertia, which is used to separate the packaging sections during packaging, thereby completing one packaging.

[0004] However, during the packing and pulling process of the cotton packing film, the detachable layer must be peeled off from the adhesive layer first, and then the tear line must be broken so that the adhesive layer can be bonded to the next adhesive area for sealing. If the tear line is broken first, the subsequent detachable layer cannot be peeled off from the adhesive layer, and the adhesive layer cannot be bonded to the next adhesive area for sealing. In this way, the packaged cotton is likely to fall apart.

[0005] At present, there is no effective solution to the problem in the related art that when the joint is separated, the adhesive film and the non-adhesive film are difficult to be pulled apart due to the rolling extrusion or film shrinkage, so the adhesive film and the non-adhesive film cannot be pulled apart, resulting in the film at the joint position being pulled apart and the joint not being separated. Utility Model Content

[0006] The purpose of the utility model is to address the deficiencies in the existing technology and provide a double-layer double-sided adhesive tape and a detachable connection structure for matching cotton packaging film, so as to solve the problems existing in the related technology that when the joint is separated, the adhesive film and the non-adhesive film bonding part are difficult to be pulled apart due to rolling extrusion or film shrinkage, so that the adhesive film and the non-adhesive film bonding part cannot be pulled apart, resulting in the film at the joint position being pulled apart and the joint not being separated.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] In a first aspect, the utility model provides a double-layer double-sided adhesive tape for use with cotton packaging film, comprising:

[0009] a first release film;

[0010] a first hot melt adhesive film, the first hot melt adhesive film being disposed on an upper surface of the first release film and extending along a first end of the first release film toward a second end thereof on the first release film for connection with the first packaging film;

[0011] a second hot melt adhesive film, the second hot melt adhesive film being disposed on a lower surface of the first release film and extending along the second end of the first release film toward the first end thereof on the first release film for connection with the second packaging film;

[0012] A second release film is provided on the first hot melt adhesive film and is used to cover the first release film.

[0013] Wherein, the first release film further comprises:

[0014] a first blank area formed on the upper surface of the first release film and located between the second end of the first release film and the end of the first hot-melt adhesive film, for preventing the first release film from adhering to the first packaging film;

[0015] The second blank position is formed on the lower surface of the first release film and is located between the first end of the first release film and the end of the second hot melt adhesive film, so as to facilitate the separation of the first release film from the second packaging film.

[0016] In some embodiments, the thickness of the first release film is 0.03 mm to 0.08 mm, and the width of the first release film is 270 mm to 290 mm.

[0017] In some embodiments, the thickness of the second release film is 0.08 mm to 0.1 mm, and the width of the second release film is 270 mm to 290 mm.

[0018] In some embodiments, the width of the second hot melt adhesive film is greater than the width of the first hot melt adhesive film.

[0019] In some embodiments, the width of the first blank space is greater than the width of the second blank space.

[0020] In some embodiments, the thickness of the first hot melt adhesive film is 0.05 mm to 0.1 mm, and the width of the first hot melt adhesive film is 190 mm to 210 mm.

[0021] In some embodiments, the thickness of the second hot melt adhesive film is 0.03 mm to 0.05 mm, and the width of the second hot melt adhesive film is 250 mm to 270 mm.

[0022] In some embodiments, further comprising:

[0023] The anti-sticking film is provided on the first release film and is located at the first blank position on the first release film, so as to prevent the first release film from adhering to the first packaging film.

[0024] In a second aspect, the present invention further provides a detachable connection structure for a matching cotton packaging film, comprising:

[0025] a first packaging film, wherein the first packaging film is an adhesive film;

[0026] a second packaging film, wherein the second packaging film is a non-adhesive film;

[0027] As described in the first aspect, the double-layer double-sided tape is arranged at the connection between the first packaging film and the second packaging film, and is used to detachably connect the first packaging film and the second packaging film.

[0028] In some embodiments, a folding area is formed at an end portion of the second packaging film, and the folding area is bonded to the double-layer double-sided tape to facilitate separation of the first packaging film from the second packaging film.

[0029] In some embodiments, the connection between the first packaging film and the second packaging film is configured in a conical structure.

[0030] The present invention adopts the above technical solution, and compared with the prior art, has the following technical effects:

[0031] The utility model provides a double-layer double-sided adhesive tape and a detachable connection structure for matching cotton packaging film. By leaving a first blank position and a second blank position on the first release film, when the joint of the first packaging film and the second packaging film is separated, the adhered portion of the first packaging film and the second packaging film can be easily separated, thereby avoiding the situation where the adhered portion of the first packaging film and the second packaging film cannot be pulled apart, resulting in the film at the joint being torn and the joint not being separated, thereby improving the packaging efficiency of the cotton packaging film. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 1 is a schematic diagram of a double-layer double-sided tape according to an embodiment of the present invention (I);

[0033] Figure 2 Schematic diagram (2) of a double-layer double-sided tape according to an embodiment of the present invention;

[0034] Figure 3 It is a schematic diagram of a detachable connection structure according to an embodiment of the present utility model.

[0035] The reference numerals are: 100, double-layer double-sided adhesive tape; 110, first release film; 111, first blank space; 112, second blank space; 120, first hot melt adhesive film; 130, second hot melt adhesive film; 140, second release film; 150, anti-sticking film;

[0036] 200, first packaging film;

[0037] 300. Second packaging film; 310. Folding area. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is described and illustrated below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely used to explain this application and are not intended to limit this application. Based on the embodiments provided in this application, all other embodiments obtained by those of ordinary skill in the art without making any creative efforts are within the scope of protection of this application.

[0039] Obviously, the drawings described below are merely examples or embodiments of the present application. Those skilled in the art can, without inventive effort, apply the present application to other similar scenarios based on these drawings. Furthermore, it is also understood that, although the effort involved in such a development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, changes in design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as an insufficiency of the content disclosed in this application.

[0040] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments unless there is a conflict.

[0041] Example 1

[0042] This embodiment relates to a double-layer double-sided adhesive tape in the present utility model.

[0043] An illustrative embodiment of the present invention is as follows: Figure 1 As shown, a double-layer double-sided adhesive tape 100 for use with cotton packaging film includes a first release film 110, a first hot-melt adhesive film 120, a second hot-melt adhesive film 130, and a second release film 140. The first hot-melt adhesive film 120 is disposed on the upper surface of the first release film 110 and extends from the first end of the first release film 110 to the second end thereof, for connection with the first packaging film 200. The second hot-melt adhesive film 130 is disposed on the lower surface of the first release film 110 and extends from the second end of the first release film 110 to the first end thereof, for connection with the second packaging film 300. The second release film 140 is disposed on the first hot-melt adhesive film 120 and covers the first release film 110.

[0044] It should be noted that the first end and the second end of the first release film 110 are respectively the ends in the width direction; the first end and the second end of the first hot melt adhesive film 120 are respectively the ends in the width direction; the first end and the second end of the second hot melt adhesive film 130 are respectively the ends in the width direction.

[0045] It should be noted that the width of the second hot melt adhesive film 130 is greater than the width of the first hot melt adhesive film 120 .

[0046] like Figure 1As shown, the upper surface of the first release film 110 is connected to the first packaging film 200 through the first hot melt adhesive film 120 , and the lower surface of the first release film 110 is connected to the second packaging film 300 through the second hot melt adhesive film 130 .

[0047] It should be noted that the thickness of the first release film 110 is 0.03 mm to 0.08 mm, and the width of the first release film 110 is 270 mm to 290 mm; preferably, the thickness of the first release film 110 is 0.05 mm, and the width of the first release film 110 is 280 mm.

[0048] In some embodiments, the first release film 110 includes but is not limited to PET release paper.

[0049] Furthermore, the first release film 110 further includes a first blank space 111 and a second blank space 112. The first blank space 111 is formed on the upper surface of the first release film 110 and is located between the second end of the first release film 110 and the end of the first hot-melt adhesive film 120, and is used to prevent the first release film 110 from adhering to the first packaging film 200. The second blank space 112 is formed on the lower surface of the first release film 110 and is located between the first end of the first release film 110 and the end of the second hot-melt adhesive film 130, and is used to facilitate separation of the first release film 110 from the second packaging film 300.

[0050] It should be noted that the width of the first blank space 111 is greater than the width of the second blank space 112 .

[0051] It should be noted that the width of the first blank space 111 is 75 mm to 85 mm; preferably, the width of the first blank space 111 is 80 mm.

[0052] It should be noted that the width of the second blank space 112 is 15 mm to 25 mm; preferably, the width of the second blank space 112 is 20 mm.

[0053] like Figure 1 As shown, the first hot melt adhesive film 120 covers the upper surface of the first release film 110 , and the first end of the first hot melt adhesive film 120 is aligned with the first end of the first release film 110 , and the second end of the first hot melt adhesive film 120 extends toward the second end of the first release film 110 .

[0054] It should be noted that the thickness of the first hot melt adhesive film 120 is 0.05 mm to 0.1 mm, and the width of the first hot melt adhesive film 120 is 190 mm to 210 mm; preferably, the thickness of the first hot melt adhesive film 120 is 0.08 mm, and the width of the first hot melt adhesive film 120 is 200 mm.

[0055] In some embodiments, the first hot melt adhesive film 120 includes but is not limited to an EVA hot melt adhesive film.

[0056] like Figure 1 As shown, the second hot melt adhesive film 130 covers the lower surface of the first release film 110 , and the first end of the second hot melt adhesive film 130 is aligned with the second end of the first release film 110 , and the second end of the second hot melt adhesive film 130 extends toward the first end of the first release film 110 .

[0057] It should be noted that the thickness of the second hot melt adhesive film 130 is 0.03 mm to 0.05 mm, and the width of the second hot melt adhesive film 130 is 250 mm to 270 mm; preferably, the thickness of the second hot melt adhesive film 130 is 0.04 mm, and the width of the second hot melt adhesive film 130 is 260 mm.

[0058] In some embodiments, the second hot melt adhesive film 130 includes but is not limited to an EVA hot melt adhesive film.

[0059] like Figure 1 As shown, the second release film 140 is bonded to the side of the first hot melt adhesive film 120 facing away from the first release film 110. After the second hot melt adhesive film 130 is bonded to the second packaging film 300, the second release film 140 is separated from the first hot melt adhesive film 120, and the first packaging film 200 is bonded to the first hot melt adhesive film 120.

[0060] It should be noted that the thickness of the second release film 140 is 0.08 mm to 0.1 mm, and the width of the second release film 140 is 270 mm to 290 mm; preferably, the thickness of the second release film 140 is 0.09 mm, and the width of the second release film 140 is 280 mm.

[0061] In some embodiments, the second release film 140 includes but is not limited to glassine release paper.

[0062] The method of using this embodiment is as follows:

[0063] In actual use, the second hot melt adhesive film 130 is pasted on the end of the second packaging film 300.

[0064] The advantage of this embodiment is that, by leaving the first blank position and the second blank position on the first release film, when the joint of the first packaging film and the second packaging film is separated, the bonded parts of the first packaging film and the second packaging film are easily separated, thereby avoiding the situation where the bonded parts of the first packaging film and the second packaging film cannot be pulled apart, resulting in the film at the joint being broken and the joint not being separated, thereby improving the packaging efficiency of the cotton packaging film.

[0065] Example 2

[0066] This embodiment is a variation of the first embodiment. The main difference between this embodiment and the first embodiment is that the double-layer double-sided tape 100 further includes a release film 150 .

[0067] like Figure 2 As shown, a double-layer double-sided tape 100 for use with cotton packaging film also includes a release film 150. The release film 150 is disposed on the first release film 110 and located in the first blank area 111 on the first release film 110 to prevent the first release film 110 from adhering to the first packaging film 200.

[0068] Specifically, the anti-sticking film 150 is attached to the first blank area 111 on the first release film 110. Since the first packaging film 200 is an adhesive film, the anti-sticking film 150 can prevent the first packaging film 200 and the first blank area 111 on the first release film 110 from adhering to each other, thereby improving the separation effect of the first packaging film 200 and the second packaging film 300.

[0069] It should be noted that the thickness of the release film 150 is 0.05 mm to 0.1 mm, and the width of the release film 150 is 75 mm to 85 mm; preferably, the thickness of the release film 150 is 0.08 mm, and the width of the release film 150 is 80 mm.

[0070] In some embodiments, the release film 150 includes but is not limited to a silicone oil film.

[0071] The usage and advantages of this embodiment are the same as those of embodiment 1 and will not be repeated here.

[0072] Example 3

[0073] This embodiment relates to a detachable connection structure in the present utility model.

[0074] like Figure 3 As shown, a detachable connection structure for cotton packaging film includes a first packaging film 200, a second packaging film 300, and the double-layer double-sided adhesive tape 100 described in Examples 1 and 2. The first packaging film 200 is an adhesive film; the second packaging film 300 is a non-adhesive film; and the double-layer double-sided adhesive tape 100 is disposed at the junction of the first packaging film 200 and the second packaging film 300 to detachably connect the first packaging film 200 and the second packaging film 300.

[0075] Specifically, the first packaging film 200 and the second packaging film 300 have the same structure, and any end of the first packaging film 200 is connected to any end of the second packaging film 300 through a double-layer double-sided tape 100 .

[0076] It should be noted that the length of the first packaging film 200 and the second packaging film 300 is 20m to 21m, and the width of the first packaging film 200 and the second packaging film 300 is 2600mm to 2800mm; preferably, the length of the first packaging film 200 and the second packaging film 300 is 20m, and the width of the first packaging film 200 and the second packaging film 300 is 2700mm.

[0077] Furthermore, a folding area 310 is formed at the end of the second packaging film 300 , and the folding area 310 is bonded to the double-layer double-sided tape 100 to facilitate separation of the first packaging film 200 and the second packaging film 300 .

[0078] It should be noted that any one end of the second packaging film 300 is folded to form a folding area 310 , and the length of the folding area 310 is 290 mm to 310 mm; preferably, the length of the folding area 310 is 300 mm.

[0079] Furthermore, the connection between the first packaging film 200 and the second packaging film 300 is arranged in a trapezoidal structure.

[0080] It should be noted that the tapered areas on the first packaging film 200 and the second packaging film 300 both include a first area and a second area, wherein the first area is arranged in a rectangular structure and the second area is arranged in a trapezoidal structure.

[0081] It should be noted that the length of the first area is 2200 mm to 2300 mm, and the width of the first area is 1480 mm to 1520 mm; preferably, the length of the first area is 2250 mm, and the width of the first area is 1500 mm.

[0082] It should be noted that the width of the second area is 1980 mm to 2020 mm; preferably, the width of the second area is 2000 mm.

[0083] The usage and advantages of this embodiment are the same as those of embodiment 1 and will not be repeated here.

[0084] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A double-layer double-sided tape for matching cotton packaging film, characterized in that: include: a first release film; a first hot melt adhesive film, the first hot melt adhesive film being disposed on an upper surface of the first release film and extending along a first end of the first release film toward a second end thereof on the first release film for connection with the first packaging film; a second hot melt adhesive film, the second hot melt adhesive film being disposed on a lower surface of the first release film and extending along the second end of the first release film toward the first end thereof on the first release film for connection with the second packaging film; a second release film, the second release film being disposed on the first hot melt adhesive film and being used to cover the first release film; Wherein, the first release film further comprises: a first blank area formed on the upper surface of the first release film and located between the second end of the first release film and the end of the first hot-melt adhesive film, for preventing the first release film from adhering to the first packaging film; The second blank position is formed on the lower surface of the first release film and is located between the first end of the first release film and the end of the second hot melt adhesive film, so as to facilitate the separation of the first release film from the second packaging film.

2. The double-layer double-sided tape according to claim 1, characterized in that: The thickness of the first release film is 0.03 mm to 0.08 mm, and the width of the first release film is 270 mm to 290 mm; and / or The thickness of the second release film is 0.08 mm to 0.1 mm, and the width of the second release film is 270 mm to 290 mm.

3. The double-layer double-sided adhesive tape according to claim 1, wherein: The width of the second hot melt adhesive film is greater than the width of the first hot melt adhesive film.

4. The double-layer double-sided tape according to claim 1, characterized in that: The width of the first blank space is greater than the width of the second blank space.

5. The double-layer double-sided adhesive tape according to claim 1, characterized in that: The thickness of the first hot melt adhesive film is 0.05 mm to 0.1 mm, and the width of the first hot melt adhesive film is 190 mm to 210 mm.

6. The double-layer double-sided adhesive tape according to claim 1, characterized in that: The thickness of the second hot melt adhesive film is 0.03 mm to 0.05 mm, and the width of the second hot melt adhesive film is 250 mm to 270 mm.

7. The double-layer double-sided adhesive tape according to claim 1, characterized in that: Also includes: The anti-sticking film is provided on the first release film and is located at the first blank position on the first release film, so as to prevent the first release film from adhering to the first packaging film.

8. A detachable connection structure for a matching cotton packaging film, characterized in that: include: a first packaging film, wherein the first packaging film is an adhesive film; a second packaging film, wherein the second packaging film is a non-adhesive film; The double-layer double-sided tape according to any one of claims 1 to 7, wherein the double-layer double-sided tape is provided at the connection between the first packaging film and the second packaging film, and is used to detachably connect the first packaging film and the second packaging film.

9. The detachable connection structure according to claim 8, characterized in that: A folding area is formed at the end of the second packaging film, and the folding area is bonded to the double-layer double-sided tape to facilitate separation of the first packaging film from the second packaging film.

10. The detachable connection structure according to claim 8, wherein: The connection between the first packaging film and the second packaging film is arranged in a cone-shaped structure.

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