Sealing film with oxygen uptake effect and package

Abstract

The utility model provides a sealing film with an oxygen uptake effect and a package, and belongs to the technical field of food packages. The sealing film comprises a film body and a functional coating arranged on the surface of the film body, the functional coating is a noble metal coating; the functional coating at least has an area with the thickness being greater than or equal to 2 microns; at least the areas in the functional coating contain palladium and / or platinum. The noble metal in the functional coating can catalyze the hydrogen-oxygen reaction, so that the oxygen content can be reduced. The noble metal capable of catalyzing the hydrogen-oxygen reaction is embodied in the form of the coating, so that the risk of migration and falling of the noble metal in the shelf process can be reduced or avoided. The sealing film has an oxygen uptake effect and can be further used for various packages, such as food packages of milk powder and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of food packaging, and more specifically, to a sealing film and packaging with an oxygen absorption effect. Background Art

[0002] Due to process limitations, traditional milk powder filling cannot completely remove the oxygen in the can, and the oxygen content can basically only be reduced to about 2% - 3%. The presence of oxygen is unfavorable for oxygen-sensitive formula components, and it is easy to cause oxidation of oxygen-sensitive components, resulting in deterioration of product quality.

[0003] In view of this, the present utility model is specifically proposed. Summary of the Utility Model

[0004] The purpose of the present utility model is to provide a sealing film and packaging with an oxygen absorption effect, which can solve or improve the above technical problems.

[0005] The present utility model can be implemented as follows:

[0006] In a first aspect, the present utility model provides a sealing film, which includes a film body and a functional coating provided on the surface of the film body; the functional coating is a noble metal coating; the functional coating has at least a region with a thickness ≥ 2μm; at least the above region in the functional coating contains palladium and / or platinum.

[0007] In a second aspect, the present utility model provides a sealing film with an oxygen absorption effect, which includes a film body and a functional coating provided on the surface of the film body; the functional coating is a noble metal coating; the functional coating has at least a region with a thickness ≥ 2μm; at least the region in the functional coating contains palladium and / or platinum; under the condition that both hydrogen and oxygen are present in the packaging, through the catalytic action of the noble metal, hydrogen and oxygen react to consume the oxygen in the packaging.

[0008] In an optional embodiment, the thickness of the functional coating in any of the above embodiments is 2μm - 10μm.

[0009] In an optional embodiment, the thickness of the functional coating is 5μm - 7μm.

[0010] In an optional embodiment, the particle size of the noble metal in the noble metal coating in any of the above embodiments is 10nm - 20nm.

[0011] In an optional embodiment, in ppm, the concentration value of the noble metal in the above region is c, in μm, the thickness value of the above region is h, and c and h satisfy: E = c × h, E ≥ 150, h ≥ 2, c ≥ 50.

[0012] In an alternative embodiment, the thickness value of the functional coating is h in μm; the concentration value of the noble metal in the functional coating is c in ppm, and c and h satisfy: E = c × h, where E ≥ 150, h ≥ 2, and c ≥ 50.

[0013] In an alternative embodiment, the seal film in any of the above embodiments further includes a first heat-sealing layer disposed on the surface of the film body, and the functional coating is disposed on the surface of the first heat-sealing layer away from the film body.

[0014] In an alternative embodiment, the seal film in any of the above embodiments further includes a second heat-sealing layer disposed on the surface of the functional coating away from the first heat-sealing layer.

[0015] In an alternative embodiment, the total thickness of the first heat-sealing layer, the functional coating, and the second heat-sealing layer does not exceed 20 μm.

[0016] In an alternative embodiment, the seal film in any of the above embodiments further includes an additional layer disposed on the surface of the film body opposite to the first heat-sealing layer.

[0017] In a second aspect, the present invention provides a package, which includes a package body. The sealed end of the package body has the seal film of any of the foregoing embodiments, or the package body is composed of the seal film of any of the foregoing embodiments.

[0018] In an alternative embodiment, the package body contains residual oxygen and a mixed gas including hydrogen and an inert gas.

[0019] In an alternative embodiment, the package body further contains oxygen-sensitive contents.

[0020] The beneficial effects of the present invention include:

[0021] The noble metal in the functional coating of the seal film provided by the present invention can catalyze the hydrogen-oxygen reaction, which is beneficial to reducing the oxygen content. By embodying the noble metal capable of catalyzing the hydrogen-oxygen reaction in the form of a coating, the risk of migration and shedding of the noble metal during the shelf life can be reduced or avoided. The above seal film has an oxygen absorption effect and can be further used for various packages, such as food packages like milk powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 The first structural schematic diagram of the sealing film provided by the present utility model;

[0024] Figure 2 The second structural schematic diagram of the sealing film provided by the present utility model.

[0025] Icon: 10 - sealing film; 11 - additional layer; 12 - film body; 13 - first heat-sealing layer; 14 - functional coating; 15 - second heat-sealing layer. Detailed implementation manners

[0026] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the protection scope of the present utility model.

[0028] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0029] In the description of the present utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed when in use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, if terms such as "first", "second", "third", etc. are used only for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.

[0030] In addition, if terms such as "horizontal" and "vertical" are used, it does not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0031] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, if terms such as "arranged", "installed", "connected", and "coupled" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0032] Embodiment

[0033] The present utility model provides a film 10, which does not refer to the film form in an absolute sense. Specifically, it can be a layered form such as a coating, or a film form, etc.

[0034] Please refer to Figure 1 , the film 10 includes a film body 12 and a functional coating 14, and the functional coating 14 is arranged on the surface of the film body 12.

[0035] Among them, the film body 12 can be used as a support layer to provide strength and barrier function for the film 10. In some embodiments, the film body 12 can include aluminum foil, plastic film, etc. Among them, aluminum foil has characteristics such as high strength and complete barrier.

[0036] In some embodiments, the thickness of the film body 12 is 20 μm to 200 μm, such as 20 μm, 50 μm, 80 μm, 100 μm, 120 μm, 150 μm, 180 μm, or 200 μm, etc.

[0037] As an example, when aluminum foil is used as the film body 12, its thickness can be exemplarily 60 μm to 90 μm; when a plastic film or the like is used as the film body 12, its thickness can be exemplarily greater than or equal to 150 μm. In some embodiments, the functional coating 14 can be directly arranged on the surface of the film body 12, or indirectly arranged on the surface of the film body 12. "Indirect arrangement" can be understood as that there are other structures between the film body 12 and the functional coating 14.

[0038] In the technical solution of the present utility model, the functional coating 14 is a noble metal coating, and the functional coating 14 contains noble metals capable of catalyzing the hydrogen-oxygen reaction. As an example, the above noble metals can include, but are not limited to, at least one of Pd and Pt. Considering cost, Pd is preferably included. Correspondingly, the noble metal coating contains palladium and / or platinum.

[0039] At least a region with a thickness ≥ 2 μm exists in the above functional coating 14, and at least the above region in the functional coating 14 contains palladium and / or platinum.

[0040] In some embodiments, there is at least a region in the functional coating 14 that satisfies E = c × h, E ≥ 150, h ≥ 2, and c ≥ 50; where, in μm, the thickness value of the region is h; in ppm, the concentration value of the noble metal in the region is c.

[0041] In some embodiments, the noble metal in the functional coating 14 is in a uniformly distributed form. Correspondingly, in μm, the thickness value of the functional coating 14 is h; in ppm, the concentration value of the noble metal in the functional coating 14 is c, and c and h satisfy: E = c × h, E ≥ 150, h ≥ 2, and c ≥ 50.

[0042] In other embodiments, the noble metal in the functional coating 14 is in a non-uniformly distributed form. For example, it is not uniformly distributed in the thickness direction and / or on the horizontal plane. In this case, as long as there is a region in the entire functional coating 14 that can satisfy E = c × h, E ≥ 150, h ≥ 2, and c ≥ 50 (in μm, the thickness value of the region is h; in ppm, the concentration value of the noble metal in the region is c). It should be noted that the number of regions in the functional coating 14 that meet the above conditions can be only 1, or 2 or more.

[0043] The above-mentioned sealing film 10 is used to consume oxygen in the package containing the sealing film 10 in cooperation with hydrogen to achieve an oxygen absorption effect. Specifically, under the condition that both hydrogen and oxygen are present in the package, the sealing film 10 causes the hydrogen and oxygen to undergo a hydrogen-oxygen reaction through the catalytic action of the noble metal to consume the oxygen in the package.

[0044] The above-mentioned functional coating 14 contains a noble metal that can catalyze the hydrogen-oxygen reaction, which can catalyze the reaction between hydrogen and oxygen and is beneficial to reducing the oxygen content. By defining the cooperation relationship between h and c, the functional coating 14 can solidify the water generated during the hydrogen-oxygen reaction process. On this basis, it can also ensure that the generated water can open the gas migration channels in the functional coating 14, accelerating the diffusion of hydrogen and oxygen in the container into the functional coating 14, further accelerating the consumption and removal of oxygen. The functional coating 14 that meets the above formula can achieve the basic removal of oxygen and water. In addition, by embodying the noble metal that can catalyze the hydrogen-oxygen reaction in the form of a coating, the risk of migration and shedding of the noble metal during the shelf life can also be reduced or avoided.

[0045] In some embodiments, the noble metal is in the form of particles; in other embodiments, the noble metal is in a non-particle form.

[0046] In some embodiments, the size of the noble metal is in the nanometer to micrometer range. In some relatively typical embodiments, the noble metal is in the form of particles, and its particle size is 10 nm to 20 nm, such as 10 nm, 12 nm, 15 nm, 18 nm, or 20 nm, etc.

[0047] In some embodiments, the concentration level of the noble metal in the functional coating 14 is in the ppm range, which can save costs while playing a role and reduce or avoid potential food safety risks. Exemplarily, the concentration of the noble metal in the functional coating 14 can be 200 ppm to 500 ppm, such as 200 ppm, 250 ppm, 300 ppm, 350 ppm, 400 ppm, 450 ppm or 500 ppm, etc.

[0048] In some embodiments, the thickness of the functional coating 14 is 2 μm to 10 μm, such as 2 μm, 4 μm, 6 μm, 8 μm or 10 μm, etc. In some preferred embodiments, the thickness of the functional coating 14 is 5 μm to 7 μm, such as 5 μm, 5.5 μm, 6 μm, 6.5 μm or 7 μm, etc.

[0049] The number of layers of the above-mentioned functional coating 14 can be 1 layer or multiple layers, and the total thickness of each layer of the functional coating 14 ≥ 2 μm. When the number of layers of the functional coating 14 is multiple layers, it can be multiple layers of palladium coating, or multiple layers of platinum coating, or can be alternately arranged by palladium coating and platinum coating. In addition, in the same layer of the functional coating 14, it can contain only palladium, only platinum, or both palladium and platinum at the same time.

[0050] In some embodiments, in addition to having the function of absorbing oxygen, the above-mentioned functional coating 14 can also provide a certain heat-sealing effect. Under this condition, the functional coating 14 also contains components with heat-sealing effects.

[0051] The above-mentioned sealing film 10 further includes a first heat-sealing layer 13, the first heat-sealing layer 13 is arranged on the surface of the film body 12, and the functional coating 14 is arranged on the surface of the first heat-sealing layer 13 away from the film body 12.

[0052] The first heat-sealing layer 13 is mainly used to provide a heat-sealing effect. The thickness of the first heat-sealing layer 13 can be ≤ 15 μm, such as 15 μm, 12 μm, 10 μm, 8 μm, 5 μm or 2 μm, etc.

[0053] In some alternative embodiments, as Figure 2 shown, the above-mentioned sealing film 10 may further include a second heat-sealing layer 15, and the second heat-sealing layer 15 is arranged on the surface of the functional coating 14 away from the first heat-sealing layer 13. That is, the second heat-sealing layer 15 is an optional layer, and is specifically set or not set according to actual needs. The second heat-sealing layer 15 can isolate the packaging content from the functional coating 14 while providing a heat-sealing function, and can be applicable to the situation where the content in the packaging has strong permeability.

[0054] The thickness of the second heat-sealing layer 15 can be ≤ 15 μm, such as 15 μm, 12 μm, 10 μm, 8 μm, 5 μm or 2 μm, etc.

[0055] The heat-sealing materials of the first heat-sealing layer 13 and the second heat-sealing layer 15 can be set with reference to the prior art, as long as the materials that can achieve heat-sealing are acceptable. It should be noted that when the packaging is food packaging, the heat-sealing material also needs to meet the requirements of the food field.

[0056] Furthermore, the sealing film 10 may further include an additional layer 11, and the additional layer 11 is disposed on the surface of the film body 12 on the side opposite to the first heat-sealing layer 13.

[0057] By way of example, the additional layer 11 may exemplarily but non-limitingly include a varnish coating, which can protect the surface of the film body 12. In addition, it does not exclude that additional layers 11 with other functions can be provided according to needs.

[0058] The thickness of the additional layer 11 can be 2 μm to 8 μm, such as 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm or 8 μm, etc.

[0059] In some specific embodiments, in the direction from top to bottom, the sealing film 10 may include an additional layer 11, a film body 12, a first heat-sealing layer 13, a functional coating 14, and a second heat-sealing layer 15. In some other embodiments, in addition to the additional layer 11 and the second heat-sealing layer 15 can be selectively set and replaced, it does not exclude that other additional coatings can be newly added between the layers.

[0060] In some embodiments, the total thickness of the first heat-sealing layer 13, the functional coating 14, and the second heat-sealing layer 15 does not exceed 20 μm, such as 20 μm, 18 μm, 15 μm, 12 μm, 10 μm, 8 μm or 5 μm, etc.

[0061] The above-mentioned sealing film 10 is not only beneficial to deoxidation and water absorption, but also has good adhesion strength between the sealing film 10 and the packaging body. In addition, the above-mentioned sealing film 10 can be a disposable film, which is no longer used after being torn, so as to avoid excessive contact between the content and the sealing film 10.

[0062] In some exemplary ways, the sealing film can be set exemplarily but non-limitingly as follows:

[0063] Method 1: As Figure 1 shown, in the direction from top to bottom, the sealing film 10 includes an additional layer 11, a film body 12, a first heat-sealing layer 13, and a functional coating 14 that are sequentially stacked.

[0064] Among them, the additional layer 11 is a varnish coating, and the film body 12 is an aluminum foil. The total thickness of the above-mentioned sealing film 10 is 105.5 μm, the thickness of the additional layer 11 is 5 μm, the thickness of the film body 12 is 90 μm, and the thickness of the first heat-sealing layer 13 is 8 μm.

[0065] The above-mentioned functional coating 14 contains uniformly distributed Pd particles. The concentration of Pd particles in the functional coating 14 is 360 ppm, and the particle size of the pd particles is 10 nm to 20 nm; the thickness of the functional coating 14 is 2.5 μm. Correspondingly, E = c × h = 360 × 2.5 = 900.

[0066] Method 2: The difference between the sealing film 10 of this method and that of Method 1 is that: the concentration of Pd particles in the functional coating 14 is 200 ppm, and the particle size of the pd particles is 10 nm to 20 nm; the thickness of the functional coating 14 is 5 μm. Correspondingly, E = c × h = 200 × 5 = 1000.

[0067] Method 3: The difference between the sealing film 10 of this method and that of Method 1 is that: the concentration of Pd particles in the functional coating 14 is 500 ppm, and the particle size of the pd particles is 10 nm to 20 nm; the thickness of the functional coating 14 is 7 μm. Correspondingly, E = c × h = 500 × 7 = 3500.

[0068] Method 4: The difference between the sealing film 10 of this method and that of Method 1 is that: the concentration of Pd particles in the functional coating 14 is 600 ppm, and the particle size of the pd particles is 10 nm to 20 nm; the thickness of the functional coating 14 is 10 μm. Correspondingly, E = c × h = 600 × 10 = 6000.

[0069] Method 5: The difference between the sealing film 10 of this method and that of Method 1 is that: the concentration of Pd particles in the functional coating 14 is 50 ppm, and the particle size of the pd particles is 10 nm to 20 nm; the thickness of the functional coating 14 is 3 μm. Correspondingly, E = c × h = 50 × 3 = 150.

[0070] Method 6: The difference between the sealing film 10 of this method and that of Method 1 is that: the concentration of Pd particles in the functional coating 14 is 75 ppm, and the particle size of the pd particles is 10 nm to 20 nm; the thickness of the functional coating 14 is 2 μm. Correspondingly, E = c × h = 75 × 2 = 150.

[0071] Method 7: As Figure 2 shown, the difference between the sealing film 10 of this method and that of Method 1 is that: a second heat-sealing layer 15 is further provided on the lower surface of the functional coating 14, and the thickness of the second heat-sealing layer 15 is 4 μm.

[0072] Method 8: The difference between the sealing film 10 of this method and that of Method 1 is that: it does not contain the additional layer 11.

[0073] Correspondingly, the present utility model further provides a package, which includes a package body.

[0074] In some embodiments, the sealing end of the package body has the above-mentioned sealing film 10.

[0075] In other embodiments, the package body is composed of the above-mentioned sealing film 10.

[0076] There is residual oxygen and a mixed gas including hydrogen and an inert gas (the inert gas can exemplarily but non - limitatively include nitrogen, etc.) in the above - mentioned package body. Specifically, after the package is sealed, it can ensure that the above - mentioned mixed gas is inside. Among them, hydrogen, as a reactive gas, is used to consume the residual oxygen in the package. The possible oxygen in the package body reacts with the hydrogen in the package body under the noble metal catalysis of the functional coating 14 to realize the hydrogen - oxygen reaction between hydrogen and oxygen, thereby achieving the effect of consuming the oxygen in the package body.

[0077] In some embodiments, after encapsulation, the hydrogen content in the package is at least 2 times the residual oxygen content in the package, so that all the residual oxygen reacts.

[0078] In some embodiments, after encapsulation, the residual oxygen content in the package does not exceed 3% (such as 2% - 3%). Correspondingly, after encapsulation, the hydrogen content in the package can be below 10%, but it needs to meet the minimum value for theoretically reacting all the residual oxygen. As an example, after encapsulation, the hydrogen content in the package can be 2% - 10%.

[0079] In some embodiments, the material of the above - mentioned package body includes a metal - containing material, for example, a material including iron and / or aluminum. In addition, it can also be set to other materials according to product needs, such as PET material, etc. In some special ways, the package body can also be a metal - containing paper - based packaging material.

[0080] In some embodiments, the package body further includes oxygen - sensitive contents. The contents can exemplarily but non - limitatively include dairy products, such as milk powder and / or protein powder, etc.

[0081] In some relatively typical embodiments, the package is a milk powder can and / or a protein powder can.

[0082] For example, the milk powder can includes an iron - based can body, and the sealing end of the iron - based can body has the sealing film 10 provided by the present utility model. The headspace area of the can body is filled with nitrogen containing hydrogen. The hydrogen content is 2 times the residual oxygen content in the can body.

[0083] It should be noted that due to process limitations, traditional milk powder filling cannot completely remove the oxygen in the can, and it can only be maintained at about 2% - 3%, which is not good for oxygen - sensitive formula components. Some milk powder deoxygenation methods use deoxygenation packets (such as iron powder), but there is a risk of foreign objects.

[0084] By providing the sealing film 10 containing the functional coating 14 of the present utility model at the sealing end of the milk powder can, on the one hand, under the catalytic action of the noble metal in the functional coating 14, cooperating with the hydrogen in the milk powder can, the hydrogen and oxygen can react to generate water, thereby consuming the oxygen in the can body, and realizing the oxygen-free state of the can body during transportation or on the shelf (for example, the oxygen-free state can be achieved within 15 days after packaging); on the other hand, the functional coating 14 can absorb the generated water and prevent the milk powder from caking. In addition, the functional coating 14 can also form an oxygen channel to accelerate the oxygen consumption.

[0085] It should be noted that the above "oxygen-free state" means that the oxygen content in the milk powder can is not higher than 1% (volume percentage), preferably not higher than 0.5%, more preferably not higher than 0.1%, and further preferably 0%.

[0086] Test Example

[0087] The TBA value (thiobarbituric acid value) is used to characterize the oxidation problem of the product (milk powder) affected by the headspace oxygen. The oxidation product aldehyde of unsaturated fatty acid can react with thiobarbituric acid (TBA) to form a colored compound.

[0088] Taking the milk powder can including an iron can body, the sealing end of the iron can body having the sealing film 10 provided by the first mode of the present utility model, and the headspace of the can body being filled with nitrogen containing hydrogen, and the hydrogen content being 2 times the residual oxygen content in the can body as an example as the test sample, a comparative sample is set. The comparative sample is placing Pd in the form of palladium balls in the milk powder can, the diameter of the palladium balls is 2 mm, and the palladium loading is 1000 ppm.

[0089] The headspace oxygen concentration of the comparative sample is 2.6%. After being placed for 3 months, the TBA value of the comparative sample is 0.12; under the same conditions, the TBA value of the test sample is 0.033, which is significantly lower than that of the comparative sample.

[0090] In summary, the functional coating 14 contained in the sealing film 10 provided by the present utility model has a noble metal capable of catalyzing the hydrogen-oxygen reaction, which can catalyze the reaction of hydrogen and oxygen, and is beneficial to reducing the oxygen content; the functional coating 14 can also solidify the generated water, and the generated water can open the gas migration channel in the functional coating 14 to further accelerate the removal of oxygen; by embodying the noble metal capable of catalyzing the hydrogen-oxygen reaction in the form of a coating, the risk of migration and shedding of the noble metal during the shelf process can also be reduced or avoided. The above sealing film 10 has the effects of oxygen absorption and water absorption, and can be further used for various types of packaging, such as food packaging like milk powder.

Claims

1. A film, characterized in that, The film encapsulation includes a film body and a functional coating provided on the surface of the film body; The functional coating is a noble metal coating; There is at least a region with a thickness ≥ 2 μm in the functional coating; At least in the above region of the functional coating, it contains palladium and / or platinum.

2. A sealing film with an oxygen absorption effect, characterized in that, The film encapsulation includes a film body and a functional coating provided on the surface of the film body; the functional coating is a noble metal coating; There is at least a region with a thickness ≥ 2 μm in the functional coating; At least in the above region of the functional coating, it contains palladium and / or platinum; under the condition that both hydrogen and oxygen are contained in the package, through the catalytic action of the noble metal, the hydrogen and oxygen undergo a hydrogen-oxygen reaction to consume the oxygen in the package.

3. The film-sealing membrane according to claim 1 or 2, characterized in that The thickness of the functional coating is 2 μm to 10 μm.

4. The encapsulation film according to claim 1 or 2, characterized in that, The particle size of the noble metal in the noble metal coating is 10 nm to 20 nm.

5. The film encapsulation according to claim 1 or 2, characterized in that, In ppm, the concentration value of the noble metal in the region is c, and in μm, the thickness value of the region is h. c and h satisfy: E = c × h, E ≥ 150, h ≥ 2, c ≥ 50.

6. The film-sealing according to claim 1 or 2, characterized in that The film encapsulation further includes a first heat-sealing layer. The first heat-sealing layer is provided on the surface of the film body, and the functional coating is provided on the surface of the first heat-sealing layer away from the film body.

7. The film-sealing according to claim 6, characterized in that, The film encapsulation further includes a second heat-sealing layer. The second heat-sealing layer is provided on the surface of the functional coating away from the first heat-sealing layer.

8. The film-sealing membrane according to claim 7, characterized in that, The total thickness of the first heat-sealing layer, the functional coating, and the second heat-sealing layer does not exceed 20 μm.

9. A package, characterized in that, The package includes a package body. The sealing end of the package body has the film encapsulation according to any one of claims 1 to 8, or the package body is composed of the film encapsulation according to any one of claims 1 to 8.

10. The package according to claim 9, characterized in that, There is residual oxygen and a mixed gas including hydrogen and an inert gas in the package body.

Images