Sealing film

Abstract

The utility model provides a sealing film. The sealing film comprises a sealing layer, a waterproof breathable layer and a peelable sealing layer which are arranged layer by layer, a vent hole is formed in the sealing layer, and the waterproof breathable layer is arranged on the sealing layer and seals one end of the vent hole; waterproof breathable holes are formed in the waterproof breathable layer; the peelable sealing layer is arranged on the sealing layer and seals one end of the waterproof air hole; and the waterproof breathable layer is arranged between the sealing layer and the uncovering sealing layer. The sealing film can be used for sealing an opening of the package, and the sealing film can play a role in sealing and leakage prevention before the tearable sealing layer is torn off; when a product in the package needs to be used, only the tearable sealing layer needs to be torn or torn off; after the tearable sealing layer is torn off or torn off, the waterproof air holes can enable smell of products in the package to be diffused out of the package and can prevent the products in the package from leaking outwards, and water or other foreign matter outside the package cannot enter the package.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging, in particular to a sealing film. Background Art

[0002] Some liquid or solid products need to be sealed during transportation, and the smell of the product needs to be dissipated from the inside of the package to the outside of the package when in use. For example, some car perfumes are packaged in blister packaging or plastic bottles, and the openings of blister packaging and plastic bottle packaging usually use aluminum-plastic film as a sealing film. The aluminum-plastic film usually includes an aluminum foil layer and a plastic layer, which is sealed on the opening of the package by high-temperature hot melting. The aluminum-plastic film has a good sealing effect before being unpacked, which can prevent the product in the package from volatilizing and leaking. However, when the product needs to be used, the aluminum-plastic film needs to be torn off from the package. After the aluminum-plastic film is torn off, it can no longer be fixed on the opening of the package. The opening of the package is always in an open state, and the product in the package is easy to leak out of the package, and water or other foreign matter outside the package is also easy to enter the package. Utility Model Content

[0003] The utility model provides a sealing film to solve the technical problem of how to protect the product inside and allow the smell of the product to volatilize after the sealing film is torn off from the package.

[0004] In order to solve the above technical problems, the utility model provides a sealing film, comprising a sealing layer, a waterproof and breathable layer and a removable sealing layer arranged layer by layer; the sealing layer is provided with ventilation holes, the waterproof and breathable layer is arranged on the sealing layer and seals one end of the ventilation holes; the waterproof and breathable layer is provided with waterproof and breathable holes; the removable sealing layer is arranged on the sealing layer and seals one end of the waterproof and breathable holes; the waterproof and breathable layer is arranged between the sealing layer and the removable sealing layer.

[0005] Optionally, a plurality of the waterproof and breathable holes are provided on the waterproof and breathable layer.

[0006] Optionally, the pore size range of the waterproof air-permeable holes is (0.1nm, 1nm).

[0007] Optionally, the sealing layer, the waterproof and breathable layer and the removable sealing layer are all circular in shape.

[0008] Optionally, the removable sealing layer includes an annular sealing area, the removable sealing layer is fixed on the sealing layer through the sealing area, and the waterproof and breathable layer is located on the inner side of the sealing area.

[0009] Optionally, the area of ​​the removable sealing layer is larger than the area of ​​the sealing layer, and the removable sealing layer covers the sealing layer and extends outward along the edge of the sealing layer.

[0010] Optionally, the waterproof and breathable layer is adhered or heat-sealed on the sealing layer through a second adhesive layer.

[0011] Optionally, the removable sealing layer is adhered or heat-sealed on the sealing layer through a third adhesive layer.

[0012] The utility model also provides another sealing film, comprising a waterproof and breathable layer, a sealing layer, and a removable sealing layer which are arranged layer by layer; the sealing layer is provided with ventilation holes, the waterproof and breathable layer is arranged on one side of the sealing layer and seals one end of the ventilation holes; the waterproof and breathable layer is provided with waterproof and breathable holes; the removable sealing layer is arranged on the other side of the sealing layer and seals the other end of the ventilation holes.

[0013] The utility model also provides another sealing film, comprising a sealing layer and a removable sealing layer arranged layer by layer; the sealing layer is provided with waterproof breathable holes; the removable sealing layer is arranged on one side of the sealing layer and seals one end of the waterproof breathable holes.

[0014] The utility model provides a sealing film which can be used to seal the opening of a package. Before the removable sealing layer is torn off, the sealing film can play the role of sealing and preventing leakage. When the product in the package needs to be used, only the removable sealing layer needs to be torn off. After the removable sealing layer is torn off, the waterproof air permeable holes can allow the smell of the product in the package to be emitted to the outside of the package, and can prevent the product in the package from leaking outward, and water or other foreign matter outside the package cannot enter the package. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a bottom view schematic diagram of a sealing film provided by one embodiment of the utility model.

[0016] Figure 2 It is a top view schematic diagram of a sealing film provided by one embodiment of the utility model.

[0017] Figure 3 It is a structural schematic diagram of a sealing layer provided in one embodiment of the utility model.

[0018] Figure 4 It is a structural schematic diagram of a waterproof and breathable layer provided in one embodiment of the utility model.

[0019] Figure 5 It is a structural schematic diagram of a removable sealing layer provided by one embodiment of the utility model.

[0020] Figure 6 It is a cross-sectional schematic diagram of a sealing film provided by one embodiment of the utility model.

[0021] Figure 7It is a cross-sectional schematic diagram of a sealing film provided by one embodiment of the utility model.

[0022] Figure 8 It is a cross-sectional schematic diagram of a sealing film provided by one embodiment of the utility model.

[0023] [Description of reference numerals is as follows]:

[0024] Sealing layer-1, waterproof and breathable layer-2, removable sealing layer-3, vent hole-4, first adhesive layer-5, second adhesive layer-6, third adhesive layer-7;

[0025] Waterproof breathable holes-21;

[0026] Sealed area-31. DETAILED DESCRIPTION

[0027] In order to make the purpose, advantages and features of the utility model clearer, a sealing film proposed by the utility model is further described in detail below with reference to the accompanying drawings. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model.

[0028] In the description of the present invention, the terms "first", "second", etc. are added for the convenience of description and reference, and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined by the terms "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0029] Embodiment 1

[0030] like Figure 1-Figure 6 As shown, this embodiment provides a sealing film, comprising a sealing layer 1, a waterproof and breathable layer 2 and a removable sealing layer 3 arranged layer by layer; the sealing layer 1 is provided with a vent 4, the waterproof and breathable layer 2 is arranged on the sealing layer 1 and seals one end of the vent 4; the waterproof and breathable layer is provided with a waterproof and breathable hole 21; the removable sealing layer 3 is arranged on the sealing layer 1 and seals one end of the waterproof and breathable hole 21; the waterproof and breathable layer 2 is arranged between the sealing layer 1 and the removable sealing layer 3.

[0031] The sealing layer 1 may be an aluminum-plastic film or a film with a sealing function. The aluminum-plastic film or the film with a sealing function has a sealing function and is convenient to be fixed on the package, and can be used to form the sealing film.

[0032] The waterproof breathable layer 2 can be made of a waterproof breathable film, or can be made by sealing non-woven fabrics and electrostatic cotton and then punching holes to make the waterproof breathable layer 2. The waterproof breathable film can be made of plastics such as PP (polypropylene), PET (polyethylene glycol terephthalate), PE (polyethylene), PTFE (poly tetra fluoroethylene), PES (Polyether Sulfone) or TESLIN, and the waterproof breathable layer 2 can be made by processing and forming the waterproof breathable holes 21 on these plastics.

[0033] The removable sealing layer 3 can be a film with sealing and easy-to-remove functions such as a self-adhesive film, an easy-to-remove aluminum-plastic film or an easy-to-remove plastic film. After the self-adhesive film is removed, the self-adhesive film can be re-pasted on the sealing layer 1 and cover the waterproof and breathable layer 2. The easy-to-remove aluminum-plastic film has a better sealing effect and is easy to remove.

[0034] The sealing film can be used to seal packaging such as plastic bottles or plastic boxes, and the packaging can be used to hold products that can emit odors such as perfumes or mothballs. The waterproof and breathable layer 2 and the removable sealing layer 3 are arranged on the same side of the sealing layer 1. The cross-sectional shape of the vent 4 can be circular or elliptical. The number of the vents 4 can be one or more, and the waterproof and breathable layer 2 needs to seal the vents 4. The removable sealing layer 3 can be sealed and connected to the sealing layer 1, and can be torn off from the sealing layer 1. The removable sealing layer 3 has a sealing function before being removed, and the removable sealing layer 3 does not damage the sealing layer 1 and the waterproof and breathable layer 2 when being torn off from the sealing layer 1. After the removable sealing layer 3 is torn off from the sealing layer 1, the odor of the product can be emitted from the waterproof and breathable holes 21 to the outside of the package, and the waterproof and breathable layer 2 and the waterproof and breathable holes 21 can prevent water or other foreign matter outside the package from easily entering the package, and also prevent the product in the package from flowing out of the package.

[0035] A sealing film provided in this embodiment can be used to seal the opening of a package. Before the removable sealing layer 3 is torn off, the sealing film can play a sealing and leak-proof function; when the product in the package needs to be used, only the removable sealing layer 3 needs to be torn off; after the removable sealing layer 3 is torn off, the waterproof air permeable holes 21 can allow the smell of the product in the package to be emitted to the outside of the package, and the waterproof air permeable layer 2 and the waterproof air permeable holes 21 can prevent the product in the package from leaking out, and water or other foreign matter outside the package cannot enter the package.

[0036] Optional, such as Figure 4 As shown, the waterproof breathable layer 2 is provided with a plurality of waterproof breathable holes 21, which can improve the ventilation effect. In specific use, the number and density of the waterproof breathable holes 21 can be set according to the needs of customers.

[0037] Optional, such as Figure 4 As shown, the aperture range of the waterproof vent hole 21 is (0.1nm, 1nm). Since the diameter of a water molecule is about 0.4nm, and the surface tension of water, the aperture of the waterproof vent hole 21 below 1nm will play a water-proof role. In order to allow the odor of the product to be emitted out of the package as quickly as possible, the aperture of the waterproof vent hole 21 is preferably greater than 0.1nm. In specific use, the aperture of the waterproof vent hole 21 can be 0.45nm.

[0038] Optional, such as Figure 1-Figure 5 As shown, the shapes of the sealing layer 1, the waterproof and breathable layer 2 and the removable sealing layer 3 are all circular, which facilitates the processing and manufacturing of the sealing layer 1, the waterproof and breathable layer 2 and the removable sealing layer 3. In other embodiments, the shapes of the sealing layer 1, the waterproof and breathable layer 2 and the removable sealing layer 3 can be rectangular or other shapes.

[0039] Optional, such as Figure 1 and Figure 5 As shown, the removable sealing layer 3 includes an annular sealing area 31, the removable sealing layer 3 is fixed on the sealing layer 1 through the sealing area 31, and the waterproof and breathable layer 2 is located on the inner side of the sealing area 31. The sealing area 31 refers to the area where the sealing layer 1 and the removable sealing layer 3 are connected to each other, and the area on the removable sealing layer 3 other than the sealing area 31 may be adhered to or not adhered to the sealing layer 1 and the waterproof and breathable layer 2, but it is ensured that the waterproof and breathable layer 2 is not damaged when the removable sealing layer 3 is removed.

[0040] Optional, such as Figure 1 and Figure 6 As shown, the area of ​​the removable sealing layer 3 is larger than that of the sealing layer 1, and the removable sealing layer 3 covers the sealing layer 1 and extends outward along the edge of the sealing layer 1. The portion of the removable sealing layer 3 extending outward from the edge of the sealing layer 1 can be called a tearing handle, which facilitates tearing the removable sealing layer 3.

[0041] Optional, such as Figure 6 As shown, the sealing layer 1 is adhered or heat-sealed on the opening of the package through the first adhesive layer 5, so that it is convenient to fix the sealing layer 1 on the opening of the package. The shape of the first adhesive layer 5 can be annular.

[0042] Optional, such as Figure 6As shown, the waterproof breathable layer 2 is adhered or heat-sealed on the sealing layer 1 through the second adhesive layer 6. The second adhesive layer 6 can be formed by glue or heat-sealing material, and the waterproof breathable layer 2 can be conveniently fixed on the sealing layer 1 through the second adhesive layer 6. The shape of the second adhesive layer 6 can be annular. The waterproof breathable layer 2 can also be fixed on the sealing layer 1 by hot pressing.

[0043] Optional, such as Figure 6 As shown, the removable sealing layer 3 is adhered or heat-sealed on the sealing layer 1 through the third adhesive layer 7. The third adhesive layer 7 can be formed by glue or heat-sealing material, and the removable sealing layer 3 can be conveniently fixed on the sealing layer 1 through the third adhesive layer 7. The shape of the third adhesive layer 7 can be annular. The removable sealing layer 3 can also be fixed on the sealing layer 1 by hot pressing.

[0044] Embodiment 2

[0045] like Figure 7 As shown, based on the same technical concept as the above-mentioned sealing film, this embodiment also provides another sealing film, including a waterproof and breathable layer 2, a sealing layer 1 and a removable sealing layer 3 arranged layer by layer; the sealing layer 1 is provided with a vent 4, the waterproof and breathable layer 2 is arranged on one side of the sealing layer 1 and seals one end of the vent 4; the waterproof and breathable layer 2 is provided with a waterproof and breathable hole 21; the removable sealing layer 3 is arranged on the other side of the sealing layer 1 and seals the other end of the vent 4.

[0046] The difference between the second embodiment and the first embodiment is the position of the waterproof and breathable layer 2. In the first embodiment, the waterproof and breathable layer 2 is arranged between the sealing layer 1 and the removable sealing layer 3. In the second embodiment, the waterproof and breathable layer 2 is arranged on one side of the sealing layer 1, and the removable sealing layer 3 is arranged on the other side of the sealing layer 1.

[0047] A sealing film provided in this embodiment can be used to seal the opening of a package. Before the removable sealing layer 3 is torn off, the sealing film can play a sealing and leak-proof function; when the product in the package needs to be used, only the removable sealing layer 3 needs to be torn off; after the removable sealing layer 3 is torn off, the waterproof air permeable holes 21 can allow the smell of the product in the package to be emitted to the outside of the package, and the waterproof air permeable layer 2 and the waterproof air permeable holes 21 can prevent the product in the package from leaking out, and water or other foreign matter outside the package cannot enter the package.

[0048] Embodiment 3

[0049] like Figure 8As shown, based on the same technical concept as the above-mentioned sealing film, this embodiment also provides another sealing film, including a sealing layer 1 and a removable sealing layer 3; the sealing layer 1 is provided with a waterproof air permeable hole 21; the removable sealing layer 3 is arranged on one side of the sealing layer 1 and seals one end of the waterproof air permeable hole 21.

[0050] The difference between the third embodiment and the first embodiment is that the waterproof and breathable layer 2 is omitted in the third embodiment.

[0051] The sealing layer 1 may be perforated with micro-perforation technology to form waterproof and breathable holes 21 , so that the sealing layer 1 has a waterproof and breathable function, thereby eliminating the need for the waterproof and breathable layer 2 .

[0052] A sealing film provided in this embodiment can be used to seal the opening of a package. Before the removable sealing layer 3 is torn off, the sealing film can play a sealing and leak-proof function; when the product in the package needs to be used, only the removable sealing layer 3 needs to be torn off; after the removable sealing layer 3 is torn off, the waterproof air permeable holes 21 can allow the smell of the product in the package to be emitted to the outside of the package, and the sealing layer 1 and the waterproof air permeable holes 21 can prevent the product in the package from leaking out, and water or other foreign matter outside the package cannot enter the package.

[0053] Embodiment 4

[0054] refer to Figure 1-Figure 6 As shown, based on the same technical concept as the above-mentioned sealing film, this embodiment also provides a method for manufacturing a sealing film corresponding to the first embodiment, comprising the following steps:

[0055] Step 1: First, compound the second adhesive layer 6 (the second adhesive layer 6 at this time has a release paper with an anti-sticking protective function) on the sealing layer 1 according to the requirements of the user manufacturer; it is also possible to omit the second adhesive layer 6 and directly compound the waterproof and breathable layer 2 on the sealing layer 1 by hot pressing.

[0056] Step 2: according to the requirements of the manufacturer, air holes 4 are punched in the sealing layer 1 and the second adhesive layer 6 by die-cutting.

[0057] Step 3: peel off the release paper on the second adhesive layer 6 and laminate the waterproof and breathable layer 2.

[0058] Step 4: If the removable sealing layer 3 is a removable adhesive, the removable sealing layer 3 can be laminated at the same time as the waterproof breathable layer 2, or the removable sealing layer 3 can be affixed after the sealing layer 1 and the waterproof breathable layer 2 are laminated and heat-sealed at the bottle mouth. If the removable sealing layer 3 is a heat-sealing film such as an aluminum-plastic composite film, the removable sealing layer 3 can be laminated on the sealing layer 1 by heat sealing (i.e., hot pressing) after the sealing layer 1 and the waterproof breathable layer 2 are laminated, or the removable sealing layer 3 can be heat-sealed on the sealing layer 1 together with the waterproof breathable layer 2 after the sealing layer 1 and the waterproof breathable layer 2 are laminated and heat-sealed at the bottle mouth.

[0059] The sealing film manufactured by the method for manufacturing a sealing film provided in the present embodiment can be used to seal the opening of a package. Before the removable sealing layer 3 is torn off, the sealing film can play the role of sealing and leak prevention. When the product in the package needs to be used, only the removable sealing layer 3 needs to be torn off. After the removable sealing layer 3 is torn off, the waterproof air permeable holes 21 can allow the smell of the product in the package to be emitted to the outside of the package, and can prevent the product in the package from leaking out, and water or other foreign matter outside the package cannot enter the package.

[0060] In summary, the sealing film provided by the utility model can be used to seal the opening of the package. Before the removable sealing layer 3 is torn off, the sealing film can play the role of sealing and leak prevention; when the product in the package needs to be used, it is only necessary to tear off or remove the removable sealing layer 3; after the removable sealing layer 3 is torn off or removed, the waterproof air permeable hole 21 can allow the smell of the product in the package to dissipate outside the package, and can prevent the product in the package from leaking out, and water or other foreign matter outside the package cannot enter the package.

[0061] The above description is only a description of the preferred embodiment of the utility model, and is not any limitation to the scope of the utility model. Any changes and modifications made by ordinary technicians in this field based on the above disclosure are within the protection scope of the utility model.

Claims

1. A sealing film, characterized in that: It comprises a sealing layer, a waterproof and breathable layer and a removable sealing layer which are arranged layer by layer; the sealing layer is provided with ventilation holes, the waterproof and breathable layer is arranged on the sealing layer and seals one end of the ventilation holes; the waterproof and breathable layer is provided with waterproof and breathable holes; the removable sealing layer is arranged on the sealing layer and seals one end of the waterproof and breathable holes; the waterproof and breathable layer is arranged between the sealing layer and the removable sealing layer.

2. A sealing film according to claim 1, characterized in that: The waterproof and breathable layer is provided with a plurality of waterproof and breathable holes.

3. A sealing film according to claim 1, characterized in that: The pore diameter range of the waterproof air-permeable pores is (0.1 nm, 1 nm).

4. A sealing film according to claim 1, characterized in that: The sealing layer, the waterproof and breathable layer and the removable sealing layer are all circular in shape.

5. A sealing film as claimed in claim 4, characterized in that: The removable sealing layer comprises an annular sealing area, the removable sealing layer is fixed on the sealing layer through the sealing area, and the waterproof and breathable layer is located on the inner side of the sealing area.

6. A sealing film as claimed in claim 5, characterized in that: The area of ​​the removable sealing layer is larger than that of the sealing layer. The removable sealing layer covers the sealing layer and extends outward along the edge of the sealing layer.

7. A sealing film according to claim 1, characterized in that: The waterproof and breathable layer is adhered or heat-sealed on the sealing layer through a second adhesive layer.

8. A sealing film according to claim 1, characterized in that: The removable sealing layer is adhered or heat-sealed on the sealing layer through a third adhesive layer.

9. A sealing film, characterized in that: It comprises a waterproof and breathable layer, a sealing layer and a removable sealing layer which are arranged layer by layer; the sealing layer is provided with a vent hole, the waterproof and breathable layer is arranged on one side of the sealing layer and seals one end of the vent hole; the waterproof and breathable layer is provided with a waterproof and breathable hole; the removable sealing layer is arranged on the other side of the sealing layer and seals the other end of the vent hole.

10. A sealing film, characterized in that: The invention comprises sealing layers and removable sealing layers which are arranged layer by layer; the sealing layers are provided with waterproof and breathable holes; the removable sealing layer is arranged on one side of the sealing layer and seals one end of the waterproof and breathable holes.

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