Heat-shrinkable composite packaging film

Abstract

The utility model provides a thermal shrinkage composite packaging film, which comprises a first support frame, a second support frame, a first fixing rod and a second fixing rod, a first step plate is arranged at the rear end of the first support frame, a horizontal support rod is fixed in the middle of the rear end of the first step plate, and a threaded rod is fixed at the rear end of the horizontal support rod. A second step plate is fixed to the middle of the front end of the second supporting frame, an inner screw tube is fixed to the middle of the front end of the second step plate, and the outer portions of the inner screw tube and the horizontal supporting rod are movably sleeved with a composite packaging film body which is formed by combining a PET heat shrinkage film layer, a bonding layer and a heat shrinkage polyester film label layer. The first fixing rod and the second fixing rod are fixed to the lower right side of the front end of the second supporting frame, the problem that an original device is limited in use due to the fact that air holes are formed in the original device is solved through the design, the combined type heat shrinkage packaging film and the auxiliary structure are designed, and sealed packaging or perforated air-permeable packaging can be selected according to different packaged objects.

Description

Technical Field

[0001] The utility model relates to a heat-shrinkable composite packaging film, belonging to the technical field of packaging films. Background Art

[0002] Heat shrink film is used for the sale and transportation of various products, primarily to stabilize, cover, and protect them. Shrink film must possess high puncture resistance, good shrinkage, and a certain degree of shrinkage stress. During the shrinkage process, the film must be free of holes. Because shrink film is often used outdoors, it requires the addition of UV stabilizers. Multi-layer composite packaging films are rapidly gaining popularity in China due to their exquisite printing effects, excellent physical and chemical properties, and low price. They are widely used in the food, pharmaceutical, chemical, and machinery industries.

[0003] Publication number: CN219791101U, mentions a polyethylene ultra-thin heat-shrinkable packaging film, in which a plurality of air holes are provided on the surface of the packaging film body. The plurality of air holes provided on the packaging film body can allow external air to enter the packaging film to prevent the items in the packaging film from being damaged. However, once the air holes are provided in the device, its sealing performance is affected, and then during packaging, it will be affected by other external factors such as moisture and dust, which also reduces the protective performance. At the same time, the heat-shrinkable film provides cushioning and protection by tightly wrapping the product, and the presence of holes weakens this function. Now there is an urgent need for a heat-shrinkable composite packaging film to solve the above-mentioned problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a heat-shrinkable composite packaging film to solve the problems raised in the above-mentioned background technology. The utility model designs a composite heat-shrinkable packaging film and auxiliary structure, which can select sealed packaging or perforated breathable packaging according to different packaging objects.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a heat-shrinkable composite packaging film, including a first support frame, a second support frame, a first fixing rod and a second fixing rod, a first step plate is installed at the rear end of the first support frame, a horizontal support rod is fixed in the middle of the rear end of the first step plate, a threaded rod is fixed at the rear end of the horizontal support rod, a second step plate is fixed in the middle of the front end of the second support frame, an inner spiral tube is fixed in the middle of the front end of the second step plate, a composite packaging film body is movably covered on the outer side of the inner spiral tube and the horizontal support rod, and the composite packaging film body is composed of a PET heat-shrinkable film layer, an adhesive layer and a heat-shrinkable polyester film label layer, the first fixing rod and the second fixing rod are fixed to the lower right side of the front end of the second support frame, a plurality of perforating needles are fixed on the right end of the first fixing rod from front to back, and a cutting blade is horizontally fixed on the right end of the second fixing rod.

[0006] Furthermore, the threaded rod is screwed into the inner spiral tube.

[0007] Furthermore, the heat-shrinkable polyester film label layer is fixed to the upper end of the PET heat-shrinkable film layer through an adhesive layer.

[0008] Furthermore, arc-shaped rounded corners are provided at the upper and lower ends of the first fixing rod.

[0009] Furthermore, the first fixing rod is located directly above the second fixing rod.

[0010] Furthermore, the first support frame is located directly in front of the second support frame.

[0011] The beneficial effects of the utility model: the utility model is a heat-shrinkable composite packaging film, because the utility model adds a first support frame, a horizontal support rod, a threaded rod, an inner screw tube, a second support frame, a first step plate, a second step plate, a first fixing rod, a perforating needle, an arc-shaped fillet, a second fixing rod and a cutting blade. Our design improvements and actual use have shown that the device has a reasonable structure and good practicality. A composite heat-shrinkable packaging film and auxiliary structure are designed, which can select sealed packaging or perforated breathable packaging according to different packaging objects, thereby increasing the scope of application of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0013] Figure 1 This is a three-dimensional schematic diagram of the overall structure of a heat-shrinkable composite packaging film of the present invention;

[0014] Figure 2 This is a schematic diagram of the position of the inner spiral tube of a heat-shrinkable composite packaging film of the utility model;

[0015] Figure 3 This is a schematic diagram of the composite packaging film main body composite structure of a heat-shrinkable composite packaging film of the utility model;

[0016] In the figure: 1-first support frame, 2-horizontal support rod, 3-threaded rod, 4-inner screw tube, 5-second support frame, 6-first step plate, 7-second step plate, 8-first fixing rod, 9-punch needle, 10-arc fillet, 11-second fixing rod, 12-cutting blade, 13-composite packaging film body, 14-PET heat shrinkable film layer, 15-adhesive layer, 16-heat shrinkable polyester film label layer. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0018] See also Figure 1-Figure 3 The utility model provides a technical solution: a heat-shrinkable composite packaging film, including a first support frame 1, a second support frame 5, a first fixing rod 8 and a second fixing rod 11. A first step plate 6 is installed at the rear end of the first support frame 1, a horizontal support rod 2 is fixed in the middle of the rear end of the first step plate 6, a threaded rod 3 is fixed at the rear end of the horizontal support rod 2, a second step plate 7 is fixed in the middle of the front end of the second support frame 5, an inner spiral tube 4 is fixed in the middle of the front end of the second step plate 7, and a composite packaging film body 13 is movably covered on the outside of the inner spiral tube 4 and the horizontal support rod 2. The composite packaging film body 13 is composed of a PET heat-shrinkable film layer 14, an adhesive layer 15 and a heat-shrinkable polyester film label layer 16. The first fixing rod 8 and the second fixing rod 11 are fixed to the lower right side of the front end of the second support frame 5. A plurality of perforating needles 9 are fixed on the right end of the first fixing rod 8 from front to back, and a cutting blade 12 is horizontally fixed on the right end of the second fixing rod 11. This design solves the problem that the original device has limited use of air holes.

[0019] As a first embodiment of the present invention, threaded rod 3 is screwed into inner screw tube 4. By screwing the added threaded rod 3 into inner screw tube 4, inner screw tube 4 and horizontal support rod 2 are connected and fixed, thereby also securing first support frame 1 and second support frame 5 together. Heat-shrinkable polyester film label layer 16 is secured to the upper end of PET heat-shrinkable film layer 14 via adhesive layer 15. The added adhesive layer 15 facilitates the composite connection between heat-shrinkable polyester film label layer 16 and PET heat-shrinkable film layer 14. Both heat-shrinkable polyester film label layer 16 and PET heat-shrinkable film layer 14 can shrink upon heating, and the composite arrangement effectively enhances their tear resistance and flexibility.

[0020] The first fixing rod 8 is provided with arc-shaped fillets 10 at both the upper and lower ends. The added arc-shaped fillets 10 facilitate the composite packaging film body 13 to be attached to the lower end of the first fixing rod 8 and pulled out for use. The first fixing rod 8 is directly above the second fixing rod 11. The addition of the first fixing rod 8 and the second fixing rod 11 facilitates the installation of multiple perforating needles 9 and cutting blades 12. The first support frame 1 is directly in front of the second support frame 5.

[0021] As a second embodiment of the present utility model: in actual use, the composite packaging film body 13 is pulled out from between the first fixing rod 8 and the second fixing rod 11 for packaging and use. When it needs to be sealed and packaged, the pulled out composite packaging film body 13 is directly buckled down on the cutting blade 12 and cut. When it is necessary to perform breathable packaging on external objects, the composite packaging film body 13 passing through the first fixing rod 8 and the second fixing rod 11 is swung upward so that multiple perforation needles 9 penetrate the composite packaging film body 13, and then the composite packaging film body 13 is pulled out from the multiple perforation needles 9, and finally cut by the cutting blade 12, and the external objects can be breathably packaged.

[0022] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0023] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A heat-shrinkable composite packaging film, comprising a first support frame (1), a second support frame (5), a first fixing rod (8) and a second fixing rod (11), characterized in that: A first step plate (6) is installed at the rear end of the first support frame (1), a horizontal support rod (2) is fixed in the middle of the rear end of the first step plate (6), a threaded rod (3) is fixed in the rear end of the horizontal support rod (2), a second step plate (7) is fixed in the middle of the front end of the second support frame (5), and an inner screw tube (4) is fixed in the middle of the front end of the second step plate (7); The inner spiral tube (4) and the horizontal support rod (2) are movably covered with a composite packaging film body (13), and the composite packaging film body (13) is composed of a PET heat-shrinkable film layer (14), an adhesive layer (15) and a heat-shrinkable polyester film label layer (16). The first fixing rod (8) and the second fixing rod (11) are fixed to the lower right side of the front end of the second support frame (5). The right end of the first fixing rod (8) is fixed with a plurality of perforating needles (9) from front to back, and the right end of the second fixing rod (11) is horizontally fixed with a cutting blade (12).

2. The heat-shrinkable composite packaging film according to claim 1, characterized in that: The threaded rod (3) is screwed into the inner spiral tube (4).

3. The heat-shrinkable composite packaging film according to claim 1, characterized in that: The heat-shrinkable polyester film label layer (16) is fixed to the upper end of the PET heat-shrinkable film layer (14) via an adhesive layer (15).

4. The heat-shrinkable composite packaging film according to claim 1, characterized in that: The upper and lower ends of the first fixing rod (8) are both provided with arc-shaped rounded corners (10).

5. The heat-shrinkable composite packaging film according to claim 1, characterized in that: The first fixing rod (8) is located directly above the second fixing rod (11).

6. The heat-shrinkable composite packaging film according to claim 1, characterized in that: The first support frame (1) is located directly in front of the second support frame (5).

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