Double-layer thermal shrinkage film for packaging multi-connected bottles and cans

Abstract

The utility model discloses a double-layer thermal shrinkage film for packaging multi-connected bottles and cans, which comprises an inner thermal shrinkage film, a plurality of bottles and cans form a bottle and can group, two ends of the inner thermal shrinkage film are provided with first holes for the bottle and can group to enter, the inner thermal shrinkage film after being heated and shrunk wraps the bottle and can group, and the first holes are positioned on two sides of the bottle and can group; the two ends of the outer thermal shrinkage film are provided with second holes allowing the bottle and can set to enter, the outer thermal shrinkage film shrunk after being heated wraps the bottle and can set and the inner thermal shrinkage film together, and the second holes are located in the two sides of the bottle and can set; wherein the first hole is covered by the outer thermal shrinkage film, the opening direction of the first hole is perpendicular to the opening direction of the second hole, and the second hole is located at the two ends of the bottle and can set in the length direction. The inner thermal shrinkage film and the outer thermal shrinkage film are wrapped in a vertically staggered mode, inherent holes of the thermal shrinkage films are completely covered, dirt and dust are effectively prevented, the packaging sealing performance and the overall strength are improved, and grabbing and carrying are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of heat shrink film, specifically to a double-layer heat shrink film for multi-unit bottle and can packaging. Background Technology

[0002] POF, or heat shrink film, is a multilayer co-extruded polyolefin heat shrink film. It is made by extruding linear low-density polyethylene as the middle layer and copolymer polypropylene as the inner and outer layers using three extruders, followed by die forming and bubble inflation. Heat shrink film is a thermoplastic film that tightly wraps around a product after shrinking when heated.

[0003] Canned beverages such as canned cola often use heat-shrink film for multi-can packaging. The heat-shrink process tightly wraps the film around the can, allowing multiple cans of beverage to be packaged together for easy transportation, storage, and sale. When not heated and shrunk, the heat-shrink film is tubular, with openings at both axial ends to facilitate fitting onto the sides of the can. After heat shrinkage, while the opening area decreases due to shrinkage, it generally still exists, typically located on the sides of the can assembly.

[0004] In most cases, existing heat-shrink film packaging already covers the top and bottom of the can assembly, and the shrinkage force temporarily makes the can assembly a single unit, facilitating the handling of the entire assembly. However, in scenarios where high cleanliness of the can surface is required, or under poor storage conditions, the drawbacks of the openings become apparent. Impurities and even insects can enter through the inherent openings in the heat-shrink film, contaminating the outer wall of the can. This is unacceptable in scenarios with high cleanliness requirements. It may also force sales personnel to clean the cans during sales, increasing their workload. Utility Model Content

[0005] The problem to be solved by this utility model is to provide a double-layer heat-shrinkable film for multi-unit bottle and can packaging.

[0006] To solve the above problems, this utility model provides a double-layer heat-shrinkable film for multi-unit bottle and can packaging. To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problems is as follows:

[0007] A double-layer heat-shrinkable film for multi-bottle packaging includes: an inner heat-shrinkable film, comprising a group of bottles and cans, the inner heat-shrinkable film having first openings at both ends for the bottle and can group to enter, the inner heat-shrinkable film wrapping the bottle and can group after heat shrinking, and the first openings being located on both sides of the bottle and can group; and an outer heat-shrinkable film, having second openings at both ends for the bottle and can group to enter, the outer heat-shrinkable film wrapping both the bottle and can group and the inner heat-shrinkable film together after heat shrinking, and the second openings being located on both sides of the bottle and can group; wherein, the first opening is covered by the outer heat-shrinkable film, the opening direction of the first opening is perpendicular to the opening direction of the second opening, and the second opening is located at both ends along the length of the bottle and can group.

[0008] As a further improvement of this utility model, when not heated and shrunken, both the inner heat-shrinkable film and the outer heat-shrinkable film are tubular with both ends open, and the axial length of the inner heat-shrinkable film is less than the axial length of the outer heat-shrinkable film, while the area enclosed by the cross-section of the inner heat-shrinkable film is greater than the area enclosed by the cross-section of the outer heat-shrinkable film.

[0009] As a further improvement of this utility model, when not subjected to heat shrinkage, the surface areas of the inner heat shrink film and the outer heat shrink film are equal.

[0010] As a further improvement of this utility model, several bottles and cans are arranged in a rectangular array on the same horizontal plane to form a bottle and can group. The height of the first opening after the inner heat shrink film is heated and shrunk is less than the axial length of the bottle and can, and the height of the second opening after the outer heat shrink film is heated and shrunk is less than the axial length of the bottle and can.

[0011] As a further improvement of this utility model, the thickness of the outer heat shrink film is greater than the thickness of the inner heat shrink film.

[0012] As a further improvement of this utility model, the inner heat shrink film is printed with patterns and / or text, and the outer heat shrink film is a transparent film.

[0013] As a further improvement of this utility model, the thickness of the inner heat shrink film and the outer heat shrink film is one of 12μm, 15μm, 20μm, 25μm, 30μm, and 37μm.

[0014] The beneficial technical effects of using the double-layer heat-shrink film for multi-bottle and can packaging according to this application are:

[0015] The double-layer heat-shrink film structure effectively prevents impurities, insects, and other contaminants from entering the packaging through the opening of the inner heat-shrink film, thus avoiding contamination of the bottle's outer wall. This is especially suitable for scenarios requiring high cleanliness. Essentially, it's like two layers of heat-shrink film completely wrapping the bottle assembly.

[0016] The first and second openings are perpendicular to each other. This perpendicularity ensures that the openings of the inner and outer heat shrink films are staggered, thus achieving 100% full coverage.

[0017] Conventional packaging uses only one layer of film, while double-layer film effectively increases the overall thickness of the film, making the packaged bottles and jars more robust and able to withstand handling without loosening.

[0018] Heat shrink film must have openings. This is to facilitate the fitting of bottles and cans, and also because of the existing processing methods for heat shrink film in drums and rolls. Therefore, both inner and outer heat shrink film are feasible and processable, without drastically increasing the processing difficulty of heat shrink film.

[0019] In addition, the second opening is located at both ends along the length of the bottle and can assembly, which is also to make it easier for the hands to grip the second opening for handling. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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.

[0021] Figure 1 This is a schematic diagram of the first stage of one embodiment of this utility model;

[0022] Figure 2 This is a schematic diagram of the second stage of one embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of a bottle and can assembly according to one embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of an internal heat-shrinkable film according to one embodiment of the present invention.

[0025] Figure 5 This is a schematic diagram of the external heat-shrinkable film according to one embodiment of the present invention;

[0026] Figure 6 This is a perspective view of one embodiment of the present invention.

[0027] 1-Bottle and can assembly; 101-Bottle and can; 2-Inner heat shrink film; 201-First opening; 202-First concave-convex bonding part; 3-Outer heat shrink film; 301-Second opening; 302-Second concave-convex bonding part; 4-Preliminary packaging form; 5-Final packaging form. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to specific embodiments:

[0029] To achieve the purpose of this utility model, a double-layer heat-shrinkable film for multi-unit bottle and can packaging includes: an inner heat-shrinkable film 2, in which several bottles and cans 101 constitute a bottle and can assembly 1. The inner heat-shrinkable film 2 has first openings 201 at both ends for the bottle and can assembly 1 to enter. After being heated and shrunk, the inner heat-shrinkable film 2 wraps the bottle and can assembly 1, and the first openings 201 are located on both sides of the bottle and can assembly 1. An outer heat-shrinkable film 3 has second openings 301 at both ends for the bottle and can assembly 1 to enter. After being heated and shrunk, the outer heat-shrinkable film 3 wraps both the bottle and can assembly 1 and the inner heat-shrinkable film 2, and the second openings 301 are located on both sides of the bottle and can assembly 1. The first openings 201 are covered by the outer heat-shrinkable film 3, and the opening direction of the first openings 201 is perpendicular to the opening direction of the second openings 301. The second openings 301 are located at both ends along the length of the bottle and can assembly 1.

[0030] Figure 1 and Figure 2 This is a diagram for easier understanding. Figure 1 and Figure 2 The diagram uses arrows and equal signs. Arrows represent the assembly direction, and equal signs represent the final assembly diagram.

[0031] Figure 4 , Figure 5 It is the shape after being heated and shrinking. Figure 4 This is the semi-finished product stage, i.e., preliminary packaging form 4. For example... Figure 5 This refers to the final application state of the product, i.e., the final packaging form 5.

[0032] Because the inner heat shrink film 2 and the outer heat shrink film 3 are mostly made of transparent material, Figure 6 You can see the first entrance 201 and the second entrance 301 in the middle.

[0033] The beneficial effects of adopting the above technical solution are: through the double-layer wrapping structure of the inner heat-shrink film 2 and the outer heat-shrink film 3, the first opening 201 is completely covered by the outer heat-shrink film 3, effectively blocking external impurities from entering from the opening and ensuring the cleanliness and hygiene of the outer wall of the bottle and can assembly 1.

[0034] like Figure 1 , Figure 2 As shown, in some other embodiments of this utility model, when the inner heat shrink film 2 and the outer heat shrink film 3 are both tubular with both ends through, and the axial length of the inner heat shrink film 2 is smaller than the axial length of the outer heat shrink film 3, and the area enclosed by the cross-section of the inner heat shrink film 2 is larger than the area enclosed by the cross-section of the outer heat shrink film 3.

[0035] When the inner heat-shrink film 2 and the outer heat-shrink film 3 are first pulled out of the roll, they can be in a double-layered, flat shape, which, when stretched, forms a tubular shape that is approximately cylindrical.

[0036] After heat shrinking, the inner heat shrink film 2 is as follows: Figure 4 As shown, the inner heat-shrink film 2 forms a first concave-convex fitting portion 202 that conforms to the bottle assembly 1, and the outer heat-shrink film is as follows: Figure 5 As shown, the outer heat shrink film 3 forms a second concave-convex fitting portion 302 that matches the bottle assembly 1.

[0037] The beneficial effects of adopting the above technical solution are: the inner heat shrink film 2 has a shorter axial length and a larger cross-section, while the outer heat shrink film 3 has a longer axial length and a smaller cross-section, so that the inner and outer films can perfectly fit the shape of the bottle and can assembly 1 during the heat shrinking process, forming a tight and flat packaging effect.

[0038] In some other embodiments of this utility model, when not subjected to heat shrinkage, the surface areas of the inner heat shrink film 2 and the outer heat shrink film 3 are equal.

[0039] The beneficial effects of adopting the above technical solution are: the inner heat shrink film 2 and the outer heat shrink film 3 maintain equal surface areas when not shrunk, ensuring that they shrink synchronously and uniformly during heat shrinking. Furthermore, the material consumption of the inner heat shrink film 2 and the outer heat shrink film 3 is basically the same.

[0040] like Figure 3 As shown, in some other embodiments of this utility model, a plurality of bottles and cans 101 are arranged in a rectangular array on the same horizontal plane to form a bottle and can group 1, such as... Figure 6 As shown, the height of the first opening 201 after the inner heat shrink film 2 shrinks due to heat is less than the axial length of the bottle 101, and the height of the second opening 301 after the outer heat shrink film 3 shrinks due to heat is less than the axial length of the bottle 101.

[0041] The beneficial effects of adopting the above technical solution are: multiple bottles and cans 101 form a bottle and can group 1 in a rectangular array. After heat shrinking, the height of the first opening 201 and the second opening 301 are both less than the axial length of the bottle and can 101, which significantly enhances the sealing performance of the packaging and ensures that the appearance of the multi-can packaging is neat and beautiful.

[0042] In some other embodiments of this utility model, the thickness of the outer heat-shrink film 3 is greater than the thickness of the inner heat-shrink film 2.

[0043] The beneficial effects of adopting the above technical solution are: the outer heat shrink film 3 adopts a thicker design than the inner heat shrink film 2, giving the outer layer better mechanical strength and wear resistance.

[0044] In some other embodiments of this utility model, the inner heat shrink film 2 is printed with a pattern, or with text, or with both patterns and text, while the outer heat shrink film 3 is a transparent film.

[0045] The beneficial effects of adopting the above technical solution are: product information can be printed on the surface of the inner heat shrink film 2, and the outer heat shrink film 3 is made of transparent material, which can not only clearly display the product content, but also provide protection for the internal printing.

[0046] In some other embodiments of this utility model, the thickness of the inner heat shrink film and the outer heat shrink film is one of 12μm, 15μm, 20μm, 25μm, 30μm, and 37μm.

[0047] The beneficial effects of adopting the above technical solution are: the inner heat shrink film 2 and the outer heat shrink film 3 provide a variety of preferred thickness specifications, and different thicknesses can be flexibly matched according to actual packaging needs.

[0048] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A double-layer heat-shrinkable film for multi-unit bottle and can packaging, characterized in that, include: An inner heat-shrink film is used to wrap the bottle and can group, which consists of several bottles and cans. The inner heat-shrink film has a first opening at both ends for the bottle and can group to enter. The inner heat-shrink film, after being heated and shrunk, wraps the bottle and can group, and the first opening is located on both sides of the bottle and can group. The outer heat shrink film has second openings at both ends for the bottle and can assembly to enter. After being heated and shrunk, the outer heat shrink film wraps the bottle and can assembly and the inner heat shrink film together, and the second openings are located on both sides of the bottle and can assembly. The first opening is covered by an external heat-shrink film, and the opening direction of the first opening is perpendicular to the opening direction of the second opening. The second opening is located at both ends of the length of the bottle assembly.

2. The double-layer heat-shrinkable film for multi-unit bottle and can packaging according to claim 1, characterized in that: When not heated and shrunk, both the inner and outer heat-shrinkable films are tubular with open ends, and the axial length of the inner heat-shrinkable film is shorter than that of the outer heat-shrinkable film. The area enclosed by the cross-section of the inner heat-shrinkable film is larger than that enclosed by the cross-section of the outer heat-shrinkable film.

3. The double-layer heat-shrinkable film for multi-unit bottle and can packaging according to claim 1, characterized in that: When not heated and shrunk, the inner heat-shrinkable film and the outer heat-shrinkable film have the same surface area.

4. The double-layer heat-shrinkable film for multi-unit bottle and can packaging according to claim 1, characterized in that: Several bottles and jars are arranged in a rectangular array on the same horizontal plane to form a bottle and jar group. The height of the first opening after the inner heat shrink film shrinks due to heat is less than the axial length of the bottle or jar, and the height of the second opening after the outer heat shrink film shrinks due to heat is less than the axial length of the bottle or jar.

5. The double-layer heat-shrinkable film for multi-unit bottle and can packaging according to claim 1, characterized in that: The thickness of the outer heat shrink film is greater than the thickness of the inner heat shrink film.

6. The double-layer heat-shrinkable film for multi-unit bottle and can packaging according to claim 1, characterized in that: The inner heat-shrink film has patterns and / or text printed on its surface, and the outer heat-shrink film is a transparent film.

7. The double-layer heat-shrinkable film for multi-unit bottle and can packaging according to claim 1, characterized in that: The thickness of the inner heat shrink film and the outer heat shrink film is one of 12μm, 15μm, 20μm, 25μm, 30μm, and 37μm.

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