Anti-fog composite film and packaging bag
By adding anti-fog composite film structure of anti-fog masterbatch to the packaging film, the problem of water droplets is solved, uniform diffusion of water vapor and anti-static and anti-adhesion are achieved, and the quality and appearance of the packaging items are maintained.
Patent Information
- Application Number
- CN202422025797.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-08-20
AI Technical Summary
The existing packaging films tend to condense water droplets on the inner surface when the temperature difference changes, affecting the quality and appearance of the contents.
Anti-fog composite film structure is adopted, including a printed film layer, a nylon film layer and a PE film layer. Anti-fog masterbatch is added to the PE film layer. The anti-fog masterbatch increases the contact angle between the water droplets and the film surface, and the water vapor spreads evenly without condensing into water droplets.
It prevents water droplets from coagulating on the surface of the film, maintains the quality and appearance of the contents, has anti-static and anti-adhesion functions, and provides stiffness.
Smart Images
Figure CN223116011U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of packaging materials, in particular to an anti-fog composite film and a packaging bag. Background Art
[0002] At present, many items are packaged with packaging films (and packaging bags made of packaging films). The structure of the commonly used packaging film is as shown in the patent publication document CN213006989U. The innermost layer of this structure of packaging film is a layer of PE film (i.e., the heat-sealing layer). This structure of packaging film has a problem when packaging some moisture-containing contents, that is, during transportation and shelf sales, due to temperature difference changes, the moisture in the packaging film (or inside the packaging bag) condenses into water droplets on the inner surface. On the one hand, the condensed water droplets easily cause the contents in the packaging film to deteriorate due to contact with the water droplets. On the other hand, the water droplets will also affect the user's view of the contents inside the packaging film from the outside. Content of the Utility Model
[0003] In view of the above problems, the utility model provides an anti-fog composite film and a packaging bag. The addition of anti-fog masterbatch in this anti-fog composite film increases the contact angle between water droplets and the film surface, so that water vapor cannot condense into water droplets on the film surface but makes the water droplets evenly diffuse on the surface, avoiding the formation of water droplets.
[0004] The technical solution adopted by the utility model is as follows:
[0005] An anti-fog composite film includes a printing film layer, a nylon film layer, and a PE film layer. The PE film layer and the printing film layer are respectively arranged on both sides of the nylon film layer. The PE film layer includes a PE film corona layer, an anti-fog PE film core layer, and an anti-fog PE film heat-sealing layer. The PE film corona layer and the anti-fog PE film heat-sealing layer are respectively arranged on both sides of the anti-fog PE film core layer.
[0006] In this anti-fog composite film, both the anti-fog PE film core layer and the anti-fog PE film heat-sealing layer are formed by adding anti-fog masterbatch during the extrusion of PE material. The addition amount of anti-fog masterbatch in the anti-fog PE film core layer is 1% - 1.5%, and the addition amount in the anti-fog PE film heat-sealing layer is 0.5% - 1%.
[0007] When this anti-fog composite film is used for packaging, the anti-fog PE film heat-sealing layer is located on the innermost side in contact with the packaged object, and the printing film layer is located on the outermost side.
[0008] The anti-fog principle of this anti-fog composite film is as follows: The addition of anti-fog masterbatch increases the contact angle between water droplets and the film surface, so that water vapor cannot condense into water droplets on the film surface but makes the water droplets evenly diffuse on the surface, avoiding the formation of water droplets.
[0009] Meanwhile, due to the presence of the above-mentioned anti-fog masterbatch in this composite film, the heat-sealing layer of the anti-fog PE film also has a certain function of anti-static and anti-adhesion.
[0010] In this composite film, the presence of the nylon film ensures that the whole composite film has better stiffness.
[0011] Optionally, it further includes a first adhesive layer and a second adhesive layer. The first adhesive layer is disposed between the printed film layer and the nylon film layer, and the second adhesive layer is disposed between the corona-treated layer of the PE film and the nylon film layer.
[0012] Specifically, the first adhesive layer and the second adhesive layer are used for bonding and increasing the stiffness of the whole composite film.
[0013] Optionally, it further includes an ink printing layer. The ink printing layer is disposed between the first adhesive layer and the printed film layer. The thickness of the first adhesive layer is 3um, the thickness of the second adhesive layer is 3um, and the thickness of the ink printing layer is 2um.
[0014] Specifically, after corresponding graphic and text information is printed on the ink printing film layer, the ink printing layer is formed.
[0015] Optionally, both the first adhesive layer and the second adhesive layer are two-component polyurethane adhesive layers.
[0016] Optionally, the printed film layer is a PET printed film layer, and the thickness of the printed film layer is 12um.
[0017] Optionally, the nylon film layer is a double-sided corona-treated nylon film layer, and the thickness of the nylon film layer is 15um.
[0018] Optionally, the thickness of the corona-treated layer of the PE film is 15um, the thickness of the core layer of the anti-fog PE film is 20um, and the thickness of the heat-sealing layer of the anti-fog PE film is 15um.
[0019] A packaging bag includes the anti-fog composite film as described above.
[0020] Specifically, this packaging bag is prepared by using the above anti-fog composite film. When using the above anti-fog composite film to make a packaging bag, two pieces of the anti-fog composite film as shown above can be used for preparation, and the heat-sealing layers of the anti-fog PE films of the two pieces of anti-fog composite film are used for bonding to each other.
[0021] The beneficial effect of the present invention is that by adding the anti-fog masterbatch, the contact angle between the water droplets and the film surface is increased, so that the water vapor cannot condense into water droplets on the surface of the film but makes the water droplets uniformly diffuse on the surface, avoiding the formation of water droplets. Description of the Drawings
[0022] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments described in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.
[0023] Figure 1 It is a schematic diagram of the structure of the anti-fog composite film.
[0024] In the figure, each reference numeral is as follows: 1, printing film layer; 2, ink printing layer; 3, first adhesive layer; 4, nylon film layer; 5, second adhesive layer; 601, PE film corona layer; 602, anti-fog PE film core layer; 603, anti-fog PE film heat-sealing layer. Specific embodiments
[0025] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will give a detailed description of the specific embodiments of the present utility model in conjunction with the accompanying drawings.
[0026] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.
[0027] In the description of the present application, it should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. For the sake of description, the dimensions of each part shown in the accompanying drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.
[0028] Embodiment 1
[0029] As shown in the attached Figure 1As shown in the figure, an anti-fog composite film includes a printing film layer 1, a nylon film layer 4, and a PE film layer. The PE film layer and the printing film layer 1 are respectively disposed on both sides of the nylon film layer 4. The PE film layer includes a PE film corona layer 601, an anti-fog PE film core layer 602, and an anti-fog PE film heat-sealing layer 603. The PE film corona layer 601 and the anti-fog PE film heat-sealing layer 603 are respectively disposed on both sides of the anti-fog PE film core layer 602.
[0030] In this anti-fog composite film, both the anti-fog PE film core layer 602 and the anti-fog PE film heat-sealing layer 603 are formed by adding anti-fog masterbatch during the extrusion of PE material. Among them, the addition amount of the anti-fog masterbatch in the anti-fog PE film core layer 602 is 1% - 1.5%, while the addition amount in the anti-fog PE film heat-sealing layer 603 is 0.5% - 1%.
[0031] When this anti-fog composite film is used for packaging, the anti-fog PE film heat-sealing layer 603 is located on the innermost side in contact with the object to be packaged, while the printing film layer 1 is located on the outermost side.
[0032] The anti-fog principle of this anti-fog composite film is as follows. The addition of the anti-fog masterbatch increases the contact angle between the water droplets and the film surface, so that the water vapor cannot condense into water droplets on the film surface but makes the water droplets evenly diffuse on the surface, avoiding the formation of water droplets.
[0033] At the same time, due to the presence of the above anti-fog masterbatch in this composite film, the anti-fog PE film heat-sealing layer 603 also has a certain function of anti-static and anti-adhesion.
[0034] In this composite film, the presence of the nylon film ensures that the entire composite film has good stiffness.
[0035] As shown in the appendix Figure 1 As shown in the figure, it further includes a first adhesive layer 3 and a second adhesive layer 5. The first adhesive layer 3 is disposed between the printing film layer 1 and the nylon film layer 4, and the second adhesive layer 5 is disposed between the PE film corona layer 601 and the nylon film layer 4.
[0036] Specifically, the first adhesive layer 3 and the second adhesive layer 5 are used for bonding and increasing the stiffness of the entire composite film.
[0037] As shown in the appendix Figure 1 As shown in the figure, it further includes an ink printing layer 2. The ink printing layer 2 is disposed between the first adhesive layer 3 and the printing film layer 1. The thickness of the first adhesive layer 3 is 3um, the thickness of the second adhesive layer 5 is 3um, and the thickness of the ink printing layer 2 is 2um.
[0038] Specifically, after corresponding graphic and text information is printed on the ink printing film layer, the ink printing layer is formed.
[0039] As shown in the appendix Figure 1As shown, both the first adhesive layer 3 and the second adhesive layer 5 are located in the two-component polyurethane adhesive layer.
[0040] As shown in the appendix Figure 1 As shown, the printed film layer 1 is a PET printed film layer 1, and the thickness of the printed film layer 1 is 12 μm.
[0041] As shown in the appendix Figure 1 As shown, the nylon film layer 4 is a double-sided corona-treated nylon film layer 4, and the thickness of the nylon film layer 4 is 15 μm.
[0042] As shown in the appendix Figure 1 As shown, the thickness of the PE film corona layer 601 is 15 μm, the thickness of the anti-fog PE film core layer 602 is 20 μm, and the thickness of the anti-fog PE film heat-sealing layer 603 is 15 μm.
[0043] Example 2
[0044] A packaging bag is prepared by using the anti-fog composite film as shown in Example 1. The anti-fog PE film heat-sealing layers of two anti-fog composite films as shown in Example 1 are bonded together to form a bag.
[0045] The packaging bag disclosed in this example can be a three-sealed bag or other forms of packaging bags.
[0046] The above-described embodiments only represent some embodiments of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments or perform equivalent substitutions for some of the technical features. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. An anti-fog composite film, comprising a printed film layer, a nylon film layer, and a PE film layer. The PE film layer and the printed film layer are respectively disposed on both sides of the nylon film layer, and it is characterized in that, The PE film layer includes a PE film corona layer, an anti-fog PE film core layer, and an anti-fog PE film heat-sealing layer. The PE film corona layer and the anti-fog PE film heat-sealing layer are respectively disposed on both sides of the anti-fog PE film core layer.
2. The anti-fog composite film according to claim 1, characterized in that, It further includes a first adhesive layer and a second adhesive layer. The first adhesive layer is disposed between the printed film layer and the nylon film layer, and the second adhesive layer is disposed between the PE film corona layer and the nylon film layer.
3. The anti-fog composite film according to claim 2, characterized in that, It further includes an ink printing layer. The ink printing layer is disposed between the first adhesive layer and the printed film layer. The thickness of the first adhesive layer is 3 um, the thickness of the second adhesive layer is 3 um, and the thickness of the ink printing layer is 2 um.
4. The anti-fog composite film according to claim 2, characterized in that, Both the first adhesive layer and the second adhesive layer are located in a two-component polyurethane adhesive layer.
5. The anti-fog composite film according to claim 1, wherein The printed film layer is a PET printed film layer, and the thickness of the printed film layer is 12 um.
6. The anti-fog composite film according to claim 1, wherein The nylon film layer is a double-sided corona-treated nylon film layer, and the thickness of the nylon film layer is 15 um.
7. The anti-fog composite film according to claim 1, wherein, The thickness of the PE film corona layer is 15 um, the thickness of the anti-fog PE film core layer is 20 um, and the thickness of the anti-fog PE film heat-sealing layer is 15 um.
8. A packaging bag, characterized in that, It includes the anti-fog composite film according to any one of claims 1 to 7.
Citation Information
Patent Citations
Packaging composite film
CN213006989U