Single-piece type sealing gasket

Abstract

The utility model discloses a single-piece type sealing gasket which comprises an upper layer, a connecting layer and an adhesive sealing composite layer which are sequentially compounded from top to bottom, the adhesive sealing composite layer comprises an electromagnetic induction heating layer and an adhesive sealing layer which are sequentially compounded from top to bottom; the upper layer comprises a surface film, and the lower surface of the upper layer is divided into a non-sticky area and a strong sticky area; the connecting layer comprises an adhesive and a release coating; the release coating is coated on the non-adhesive area of the lower surface of the upper layer, and the connecting layer is used for compounding the strong adhesive area of the lower surface of the upper layer with the adhesive sealing composite layer through an adhesive. The single-piece type sealing gasket is easy to open.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of sealing gasket, especially a single piece sealing gasket. BACKGROUND

[0002] In order to prevent the leakage of the content of the packaging container (such as beverage can, medicine can) and the deterioration caused by the influence of the external environment, a sealing gasket is used to seal the container mouth of the packaging container. By using the sealing gasket to tightly combine with the container mouth, the leakage of the content can be prevented and the content can be sealed and stored.

[0003] The existing sealing gasket generally refers to the sealing gasket including aluminum foil. In order to improve the convenience of tearing the sealing gasket, some sealing gaskets are configured with a pull-tab structure or have a part of unglued area in the sealing gasket. However, in actual use, the pull-tab or the unglued area often has the problem of sticking, which makes it inconvenient for the user to quickly open the sealing gasket by pulling the pull-tab or the unglued area.

[0004] In view of the above problems, it is necessary to study a single piece sealing gasket which is easy to open. SUMMARY

[0005] The utility model aims at providing a single piece sealing gasket which is easy to open.

[0006] In order to achieve the above purpose, the solution of the utility model is as follows:

[0007] A single piece sealing gasket, which comprises an upper layer, a connecting layer and a sealing and gluing layer which are sequentially compounded from top to bottom. The sealing and gluing layer comprises an electromagnetic induction heating layer and a sealing and gluing layer which are sequentially compounded from top to bottom. The upper layer comprises a surface film, and the lower surface of the upper layer is divided into a non-sticking area and a strong sticking area. The connecting layer comprises an adhesive and a release coating. The release coating is coated on the non-sticking area of the lower surface of the upper layer, and the connecting layer compounds the strong sticking area of the lower surface of the upper layer with the sealing and gluing layer through the adhesive.

[0008] The sectional width of the non-sticking area of the lower surface of the upper layer is greater than or equal to one sixth of the sectional width of the single piece sealing gasket, and the sectional width of the non-sticking area of the lower surface of the upper layer is less than or equal to five sixths of the sectional width of the single piece sealing gasket.

[0009] The material of the release coating is light oil or silicon oil, and the thickness of the release coating is 0.5 to 20 µm.

[0010] The coating method of the release coating is full state coating or point state coating.

[0011] The adhesive sealing composite layer further comprises a connecting film disposed above the electromagnetic induction heating layer; the connecting film comprises at least one of PE film, PP film, PA film, EPP film and EPE film, and the thickness of the connecting film is 12 to 200 µm.

[0012] The upper layer further comprises a first connecting film disposed below the surface film; the first connecting film comprises at least one of PE film, PP film, PA film, EMMA film and EMAC film, and the thickness of the first connecting film is 12 to 100 µm; the adhesive sealing composite layer further comprises a second connecting film disposed above the electromagnetic induction heating layer; the second connecting film comprises at least one of PE film, PP film, PA film, EPP film and EPE film, and the thickness of the second connecting film is 12 to 200 µm.

[0013] The adhesive sealing composite layer further comprises a thickening layer disposed above the electromagnetic induction heating layer; the thickening layer is made of at least one of EPE, EPP, PE, PP and paper, and the thickness of the thickening layer is 60 to 3000 µm.

[0014] The adhesive sealing composite layer further comprises a composite film disposed above the electromagnetic induction heating layer; the composite film comprises at least one of PET film, PEN film, PP film, PA film and PE film, and the thickness of the composite film is 12 to 100 µm.

[0015] The surface film comprises at least one of PP, PET film, PE film, PA film and EMAC film, and the thickness of the surface film is 12 to 150 µm.

[0016] The adhesive sealing layer is hot melt adhesive, the hot melt adhesive is made of one of EVA, PIB, EBA, EAA, EMAA, EMAC, polyacrylate and acrylic copolymer, and the thickness of the hot melt adhesive is 4 to 100 µm.

[0017] The adhesive sealing layer comprises an adhesive sealing film and an adhesive agent, the adhesive sealing film comprises at least one of PE film, PP film, PA film, PVDC film, EVOH film and PET film, and the thickness of the adhesive sealing film is 12 to 100 µm; the adhesive agent is disposed between the adhesive sealing film and the electromagnetic induction heating layer.

[0018] The adhesive agent is dry composite adhesive or hot melt lamination adhesive, the hot melt lamination adhesive is made of one of PE, PP, EMAC, EMAA, EAA, EEA and EMMA, and the thickness of the hot melt lamination adhesive is 4 to 60 µm.

[0019] The electromagnetic induction heating layer adopts aluminum foil.

[0020] The electromagnetic induction heating layer adopts a wireless information integrated sheet; the wireless information integrated sheet comprises a base film, an information and heating layer, and a first adhesive layer; the information and heating layer comprises an information area and an electromagnetic induction heating ring; the information area is provided with an antenna and a chip in mutual conduction, and the electromagnetic induction heating ring surrounds the information area; and the first adhesive layer is located between the base film and the information and heating layer.

[0021] The wireless information integrated sheet further comprises a protective layer and a second adhesive layer; the protective layer is located on the side of the information and heating layer away from the base film; and the second adhesive layer is located between the information and heating layer and the protective layer.

[0022] The electromagnetic induction heating ring and the information area have a spacing therebetween.

[0023] The spacing between the electromagnetic induction heating ring and the information area is 0.1 mm to 3 mm.

[0024] The electromagnetic induction heating ring and the information area are filled with the spacing therebetween.

[0025] The information and heating layer further comprises at least one physical connection bridge; the physical connection bridge connects the information area and the electromagnetic induction heating ring.

[0026] The adhesive makes the peeling strength between the lower surface of the strong bonding area of the upper layer and the adhesive sealing composite layer greater than or equal to 17.8 N / 15 mm.

[0027] After the above scheme is adopted, the release coating can ensure that the non-bonding area of the upper layer and the adhesive sealing composite layer are in a state of being compounded with each other but can be easily separated, and the release coating also ensures that the non-bonding area of the upper layer and the adhesive sealing composite layer are not bonded, so that the user can directly and easily peel off the part of the single-piece sealing gasket of the utility model on the upper side of the non-bonding area of the upper layer without the aid of external objects, and the user can easily peel off the single-piece sealing gasket of the utility model by applying force to the part of the single-piece sealing gasket of the utility model on the upper side of the non-bonding area of the upper layer. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a schematic view of the single-piece sealing gasket of the first embodiment of the utility model.

[0029] Figure 2 It is a schematic view of the single-piece sealing gasket of the second embodiment of the utility model.

[0030] Figure 3 It is a schematic view of the single-piece sealing gasket of the third embodiment of the utility model.

[0031] Figure 4 It is a side view of the single-piece sealing gasket of the utility model Figure 1 .

[0032] Figure 5 The side view of the single-piece sealing gasket of the utility model Figure 2 .

[0033] Figure 6 The cross-sectional view of the first embodiment of the wireless information integrated sheet of the utility model.

[0034] Figure 7 The plan view of the information and heating layer of the first embodiment of the wireless information integrated sheet of the utility model.

[0035] Figure 8 The plan view of the information area of the first embodiment of the wireless information integrated sheet of the utility model.

[0036] Figure 9 The cross-sectional view of the second embodiment of the wireless information integrated sheet of the utility model.

[0037] Figure 10 The plan view of the information and heating layer of the third embodiment of the wireless information integrated sheet of the utility model.

[0038] Figure 11 The plan view of the information area of the third embodiment of the wireless information integrated sheet of the utility model.

[0039] Label explanation:

[0040] Upper layer 100, surface film 110, first connecting film 120,

[0041] Connecting layer 200, adhesive 210, release coating 220,

[0042] Adhesive composite layer 300, electromagnetic induction heating layer 310, adhesive layer 320, adhesive film 321, adhesive 322, connecting film 330, composite film 340, second connecting film 350, thickening layer 360,

[0043] Adhesive a,

[0044] Base film 1w, first adhesive layer 2w, information and heating layer 3w, information area 31w, chip 311w, antenna 312w, electromagnetic induction heating ring 32w, physical connection bridge 33W, second adhesive layer 4w, protective layer 5w, interval ITV. DETAILED DESCRIPTION

[0045] In order to further explain the technical scheme of the utility model, the utility model will be described in detail below through specific embodiments.

[0046] Example one:

[0047] Match Figure 1As shown, in the embodiment one of the utility model, the utility model discloses single piece type sealing gasket includes upper layer 100, connecting layer 200 and adhesive sealing composite layer 300 in turn from top to bottom.

[0048] In the embodiment one of the utility model, upper layer 100 is arranged in the uppermost layer of the single piece type sealing gasket of the utility model, and the lower surface of upper layer 100 is divided into non-adhesive area and strong adhesive area. Figure 1 As shown, upper layer 100 includes surface film 110, and surface film 110 is used as the uppermost layer (i.e. surface layer) of the single piece type sealing gasket of the utility model. The upper surface and / or lower surface of surface film 110 can be a printing surface, which can be used to print different patterns. Surface film 110 can include at least one of PP, PET film, PE film, PA film and EMAC film, and the thickness of the surface film 110 is preferably 12 to 150 µm. Within this range, the surface film 110 has greater tensile strength, the surface is flat and has better brightness. In addition, when the single piece type sealing gasket of the utility model is subjected to heat conduction from below, the surface film 110 can be prevented from being bonded together with other external elements (such as bottle caps, etc.).

[0049] In the embodiment one of the utility model, connecting layer 200 is arranged between upper layer 100 and adhesive sealing composite layer 300. Figure 1As shown, the connecting layer 200 includes the adhesive 210 and the release coating 220, the release coating 220 is coated on the non-adhesive area of the lower surface of the upper layer 100, and the connecting layer 200 composites the strong adhesive area of the surface of the upper layer 100 and the sealing composite layer 300 through the adhesive 210. Among them, the non-adhesive area of the upper layer 100 and the sealing composite layer 300 can be ensured to be in a state of being easily separated from each other by the release coating 220, and the release coating 220 also ensures that the non-adhesive area of the upper layer 100 and the sealing composite layer 300 are not bonded, so that the user can easily peel off the part of the single-piece sealing gasket of the utility model on the upper side of the non-adhesive area of the upper layer 100 without the help of external objects, so that the user can easily peel off the single-piece sealing gasket of the utility model by applying force to the part of the single-piece sealing gasket of the utility model on the upper side of the non-adhesive area of the upper layer 100. In some embodiments, the single-piece sealing gasket of the utility model can make the peeling strength between the strong adhesive area of the lower surface of the upper layer 100 and the sealing composite layer 300 greater than or equal to 17.8N / 15mm through the adhesive 210, so as to firmly composite the upper layer 100 and the sealing composite layer 300; the adhesive 210 can be a bonding glue that can make the peeling strength between the lower surface of the upper layer 100 and the sealing composite layer 300 greater than or equal to 17.8N / 15mm; the adhesive 210 can be a dry composite glue; the adhesive 210 can also be a hot melt lamination glue, and the material of the hot melt lamination glue can be one of PE, PP, EMAC, EMAA, EAA, EEA and EMMA. The thickness of the hot melt lamination glue is preferably 4 to 60µm.

[0050] Further, the material of the release coating 220 can be, for example, a varnish or a silicone oil, and the thickness of the release coating 220 is preferably 0.5 to 20 µm. Since the lower surface of the upper layer 100 is coated with a varnish or a silicone oil (i.e., the release coating 220), the user can easily use a finger to push apart the portion of the single-piece type sealant gasket of the present application that is on the upper side of the non-sticking area of the upper layer 100, thereby ensuring that the user can easily peel off the single-piece type sealant gasket of the present application by directly pinching the portion of the single-piece type sealant gasket of the present application that is on the upper side of the non-sticking area of the upper layer 100 without the aid of an external object. In addition, the coating method of the release coating 220 can be, for example, full coating or dot coating. Taking the dot coating method as an example, after the electromagnetic induction sealing, the small amount of air between the dot matrix of the single-piece type sealant gasket of the present application that is coated with a varnish or a silicone oil will be heated and expanded by the electromagnetic induction sealing, which will cause the portion of the single-piece type sealant gasket of the present application that is on the upper side of the non-sticking area of the upper layer 100 to be pushed upward, thereby ensuring that the portion of the single-piece type sealant gasket of the present application that is on the upper side of the non-sticking area of the upper layer 100 is separated from the sealing and sticking composite layer 300, so that the user can more easily use a finger to push apart the portion of the single-piece type sealant gasket of the present application that is on the upper side of the non-sticking area of the upper layer 100, thereby ensuring that the user can easily peel off the single-piece type sealant gasket of the present application by directly pinching the portion of the single-piece type sealant gasket of the present application that is on the upper side of the non-sticking area of the upper layer 100 without the aid of an external object.

[0051] In the first embodiment of the present application, the sealing and sticking composite layer 300 is arranged at the lowermost layer of the single-piece type sealant gasket of the present application. In combination with Figure 1As shown, the adhesive sealing composite layer 300 comprises, from top to bottom, an electromagnetic induction heating layer 310 and an adhesive sealing layer 320. The electromagnetic induction heating layer 310 can be an aluminum foil or a wireless information integrated sheet. The aluminum foil is a structure that already exists in the known sealing gasket. The thickness of the aluminum foil is preferably 10 to 40 µm, so as to be able to strengthen the barrier function to moisture and oxygen, thereby preventing the leakage of the contents and enabling the contents to be sealed and stored. The present application can also use the following wireless information integrated sheet to replace the aluminum foil. The wireless information integrated sheet can effectively reduce the amount of aluminum foil used and reduce energy consumption. In addition, by means of the wireless information integrated sheet, the present application can increase the function of wireless information transmission, reduce the waste of aluminum foil material, reduce energy consumption, avoid the waste of manpower, avoid the interference of metal and liquid, improve production efficiency, have good communication performance, and greatly improve the communication distance. The thickness of the wireless information integrated sheet is preferably 27 µm to 2.5 mm.

[0052] The adhesive sealing layer 320 is mainly used to seal the container mouth. In the first embodiment of the present application, the adhesive sealing layer 320 can be a hot melt adhesive. The material of the hot melt adhesive can be one of EVA, PIB, EBA, EAA, EMAC, polyacrylate, acrylic copolymer and EMAA, so that it is easy to be peeled off or cleaned from the bottle mouth. The thickness of the hot melt adhesive is preferably 4 to 100 µm. The hot melt adhesive can achieve a continuous sealing effect even if the contents of the packaging container contain water, and can also achieve a continuous sealing effect even if the contents of the packaging container contain chili, garlic, fermented bean curd, honey and spicy additives.

[0053] Embodiment two:

[0054] Cooperation Figure 2 As shown, the difference between the second embodiment of the present application and the first embodiment is the difference in the adhesive sealing composite layer 300.

[0055] Specifically, in the second embodiment of the present application, the adhesive sealing composite layer 300 comprises, from top to bottom, an electromagnetic induction heating layer 310 and an adhesive sealing layer 320. The adhesive sealing layer 320 of the adhesive sealing composite layer 300 comprises an adhesive sealing film 321 and an adhesive 322, and the adhesive 322 is arranged between the adhesive sealing film 321 and the electromagnetic induction heating layer 310. The material of the adhesive sealing film 321 can be at least one selected from the group consisting of PE, PP, PA, PVDC, EVOH and PET, so that it is easy to be peeled off or cleaned from the bottle mouth after electromagnetic induction sealing. The thickness of the adhesive sealing film 321 is preferably 12 to 100 µm. The adhesive 322 can be, for example, a composite adhesive, but is not limited thereto.

[0056] In the embodiment two of the utility model, the adhesive sealing composite layer 300 still includes the joint film 330 and the composite film 340. The joint film 330 is arranged above the electromagnetic induction heating layer 310, in other words, the joint film 330 can be directly compounded above the electromagnetic induction heating layer 310, and the joint film 330 can also be indirectly compounded above the electromagnetic induction heating layer 310 (namely, other structures are arranged between the joint film 330 and the electromagnetic induction heating layer 310). Cooperation Figure 2 As shown, the joint film 330 is arranged at the uppermost layer of the adhesive sealing composite layer 300, which is used to be compounded with the surface film 110 of the upper layer 100, that is, the joint film 330 is compounded with the surface film 110 of the upper layer 100 through the adhesive 210. The joint film 330 can include at least one of PE film, PP film, PA film, EPP film and EPE film, and the thickness of the joint film 330 is preferably 12 to 200 µm, so as to improve the peeling strength after compounding between the joint film 330 and the upper layer 100. The composite film 340 is also arranged above the electromagnetic induction heating layer 310, specifically, the composite film 340 is arranged between the joint film 330 and the electromagnetic induction heating layer 310, and the composite film 340 is used to improve the tensile strength of the single-piece sealing gasket of the utility model, and the composite film 340 can include at least one of PET film, PA film and PP film, and the thickness of the composite film 340 is preferably 12 to 100 µm.

[0057] In the embodiment two of the utility model, the adhesive a can be used for compounding between the joint film 330 and the composite film 340 and between the electromagnetic induction heating layer 310 and the composite film 340. In some embodiments, the adhesive a can be a composite glue capable of making the peeling strength between the two compounded layers (for example, the joint film 330 and the electromagnetic induction heating layer 310 or the electromagnetic induction heating layer 310 and the composite film 340) greater than or equal to 4 N / 15 mm, but is not limited to this.

[0058] In the embodiment two of the utility model, the manufacturing method of the single-piece sealing gasket of the utility model can be:

[0059] Firstly, the adhesive is coated on the lower surface of the composite film roll stock, so that the lower surface of the composite film roll stock is dry compounded with the upper surface of the electromagnetic induction heating layer roll stock, and then the roll stock is put into the curing chamber for more than 24 hours to make the first composite part roll stock;

[0060] Secondly, the light oil or silicon oil is coated on the non-adhesive area of the lower surface of the surface film roll stock in a full or point coating manner to make the functional layer roll stock;

[0061] Then, the adhesive is coated on the composite film surface of the first composite part roll stock, so that the composite film surface of the first composite part roll stock is dry compounded with the lower surface of the joint film roll stock, and then the roll stock is put into the curing chamber for more than 24 hours to make the second composite part roll stock;

[0062] Next, an adhesive is coated on the electromagnetic induction heating layer of the second composite roll, the electromagnetic induction heating layer of the second composite roll is dry-composited with the sealing film roll, and the second composite roll is placed in a curing chamber for more than 24 hours to obtain a lower composite roll. Alternatively, a hot melt adhesive is coated on the composite film of the second composite roll to obtain a lower composite roll;

[0063] Next, an adhesive is coated on the linking film of the lower composite roll, the linking film of the lower composite roll is dry-composited with the lower surface of the functional layer roll, and the lower composite roll is placed in a curing chamber for more than 24 hours to obtain a single-piece sealing gasket roll;

[0064] Finally, the single-piece sealing gasket is cut to an appropriate size according to the needs of a user.

[0065] Embodiment Three

[0066] In combination Figure 3 As shown in the drawings, the difference between the third embodiment and the first embodiment of the utility model is the difference between the upper layer 100 and the sealing composite layer 300.

[0067] Specifically, in the third embodiment of the utility model, the upper layer 100 includes a surface film 110 and a first linking film 120; the first linking film 120 is arranged below the surface film 110, in other words, the first linking film 120 can be directly composited below the surface film 110, and the first linking film 120 can also be indirectly composited below the surface film 110 (i.e. other structures are arranged between the surface film 110 and the first linking film 120). The sealing composite layer 300 includes a second linking film 350, a thickening layer 360, an electromagnetic induction heating layer 310 and a sealing layer 320 composited in sequence from top to bottom.

[0068] In the third embodiment of the utility model, in combination Figure 3 As shown in the drawings, the first linking film 120 is arranged at the lowermost layer of the upper layer 100, and the first linking film 120 is used to composite with the sealing composite layer 300; specifically, the first linking film 120 is composited with the sealing composite layer 300 through the adhesive 210. The first linking film 120 can include at least one of a PE film, a PP film, a PA film, an EMMA film and an EMAC film, and the thickness of the first linking film 120 is preferably 12 to 100 µm; thereby, the peeling strength after composition between the first linking film 120 and the sealing composite layer 300 can be improved.

[0069] In the third embodiment of the utility model, in combination Figure 3As shown, the second connecting film 350 is disposed above the electromagnetic induction heating layer 310, in other words, the second connecting film 350 can be directly compounded above the electromagnetic induction heating layer 310, and the second connecting film 350 can also be indirectly compounded above the electromagnetic induction heating layer 310 (i.e. other structures are arranged between the second connecting film 350 and the electromagnetic induction heating layer 310). In cooperation Figure 3 As shown, the second connecting film 350 is disposed on the uppermost layer of the adhesive sealing composite layer 300, which is used for compounding with the upper layer 100; specifically, the second connecting film 350 is compounded with the first connecting film 120 of the upper layer 100 through the adhesive 210; the second connecting film 350 can include at least one of a PE film, a PP film, a PA film, an EPP film and an EPE film, and the thickness of the second connecting film 350 is preferably 12 to 200 µm; thereby, the peeling strength after compounding between the second connecting film 350 and the first connecting film 120 of the upper layer 100 can be improved.

[0070] In the third embodiment of the present application, the second connecting film 350 and the thickening layer 360 can be compounded by using an adhesive a. The adhesive a can be a compounding glue capable of making the peeling strength between the two layers (for example, the second connecting film 350 and the thickening layer 360) greater than or equal to 4 N / 15 mm, but is not limited thereto. In addition, the surface film 110 and the first connecting film 120 can be compounded by using the adhesive a, and the adhesive a can be a compounding glue capable of making the peeling strength between the two layers (for example, the surface film 110 and the first connecting film 120) greater than or equal to 4 N / 15 mm, but is not limited thereto. Figure 3 As shown, the thickening layer 360 is disposed above the electromagnetic induction heating layer 310, and the thickening layer 360 is used to increase the thickness of the single-piece sealing gasket of the present application. The material of the thickening layer 360 can be at least one of EPE, EPP, PE, PP and paper, and the thickness of the thickening layer 360 is preferably 60 to 3000 µm; thereby, the thickness of the single-piece sealing gasket of the present application can be increased.

[0071] In the third embodiment of the present application, the second connecting film 350 and the thickening layer 360 can be compounded by using an adhesive a. The adhesive a can be a compounding glue capable of making the peeling strength between the two layers (for example, the second connecting film 350 and the thickening layer 360 or the thickening layer 360 and the electromagnetic induction heating layer 310) greater than or equal to 4 N / 15 mm, but is not limited thereto. In addition, the surface film 110 and the first connecting film 120 can be compounded by using the adhesive a, and the adhesive a can be a compounding glue capable of making the peeling strength between the two layers (for example, the surface film 110 and the first connecting film 120) greater than or equal to 4 N / 15 mm, but is not limited thereto.

[0072] In the third embodiment of the present application, the manufacturing method of the single-piece sealing gasket of the present application can be:

[0073] First, an adhesive is applied to the lower surface of the surface film roll stock, and the composite surface of the surface film roll stock is dry compounded with the upper surface of the first connecting film roll stock, and then the roll stock is aged in an aging chamber for more than 24 hours to obtain an upper composite part roll stock;

[0074] Secondly, the non-stick area of the first connecting film surface of the upper composite section roll material is coated with light oil or silicon oil in a full or point coating manner to form a functional layer roll material;

[0075] Then, the upper surface of the electromagnetic induction heating layer roll material is coated with an adhesive, the electromagnetic induction heating layer roll material is dry-composited with the lower surface of the thickening layer roll material, and the composite is placed in a curing chamber for more than 24 hours to form a first composite section roll material;

[0076] Next, the thickening layer surface of the first composite section roll material is coated with an adhesive, the thickening layer surface of the first composite section roll material is dry-composited with the lower surface of the second connecting film roll material, and the composite is placed in a curing chamber for more than 24 hours to form a second composite section roll material;

[0077] Then, the electromagnetic induction heating layer surface of the second composite section roll material is coated with an adhesive, the electromagnetic induction heating layer surface of the second composite section roll material is dry-composited with the composite surface of the sealing film roll material, and the composite is placed in a curing chamber for more than 24 hours to form a lower composite section roll material. Alternatively, the electromagnetic induction heating layer surface of the second composite section roll material is coated with a hot melt adhesive to form a lower composite section roll material;

[0078] Then, the second connecting film surface of the lower composite section roll material is coated with an adhesive, the second connecting film surface of the lower composite section roll material is dry-composited with the first connecting film surface of the functional layer roll material, and the composite is placed in a curing chamber for more than 24 hours to form a single-piece sealing gasket roll material;

[0079] Finally, the single-piece sealing gasket is cut to the appropriate size according to the user's needs.

[0080] In order to facilitate the understanding of the wireless information integrated sheet of the present application, the following describes the embodiments of the wireless information integrated sheet.

[0081] The first embodiment of the wireless information integrated sheet is as follows: Figures 6 to 8 As shown in the first embodiment of the wireless information integrated sheet, the wireless information integrated sheet comprises a base film 1w, a first adhesive layer 2w, and an information and heating layer 3w. The first adhesive layer 2w is located between the base film 1w and the information and heating layer 3w, so as to bond the base film 1w and the information and heating layer 3w.

[0082] In the first embodiment of the wireless information integrated sheet, the base film 1w is used to make the initial layer of the wireless information integrated sheet. In a specific example, the base film 1w can include at least one of a PI film, a PEN film, a PET film, a PC film, a PP film, and a PE film, and the thickness of the base film 1w is preferably 20 to 150 µm. Within this range, the base film 1w has a relatively large tensile strength in the longitudinal direction. The lower surface of the base film 1w is bonded to the first adhesive layer 2w, and the upper surface of the base film 1w can be used as a printing surface to print different patterns.

[0083] In a first embodiment of the wireless information integration sheet, the first adhesive layer 2w is used to bond the base film 1w and the information to the heating layer 3w. The first adhesive layer 2w only needs to be able to bond the base film 1w and the information to the heating layer 3w, and its material can be, for example, a composite adhesive. The thickness of the first adhesive layer 2w can be 0.5 to 7 µm, and the first adhesive layer 2w can provide a peel strength greater than 4 N / 15 mm between the bonded two layers.

[0084] In a first embodiment of the wireless information integrated chip, the information and heating layer 3w includes an information area 31w and an electromagnetic induction heating ring 32w. The information area 31w has the function of wireless information reading, writing, and transmission for subsequent product traceability. The information area 31w has an antenna 312w and a chip 311w that are interconnected. The electromagnetic induction heating ring 32w can generate heat through the electromagnetic field generated by the electromagnetic induction sealing machine, causing the adhesive sealing layer 320 of this invention to melt and adhere to the container opening, thus acting as an electromagnetic induction sealing gasket to seal the container opening. In this wireless information integrated chip, most of the heat is generated in the electromagnetic induction heating ring 32w, with very little heat conducted only by at least one physical connecting bridge 33w between the antenna 312w and the electromagnetic induction heating ring 32w. The length of the physical connecting bridge 33w can be 0.1 to 3 mm, the width of the physical connecting bridge 33w can be 0.01 to 5 mm, and the material of the physical connecting bridge 33w can be the same as that of the antenna 312w. This not only prevents the heat from being transferred to the center of the sealing gasket during electromagnetic induction sealing, but also saves energy. Furthermore, when applied to sealing gaskets containing batteries, the thickness of the information and heating layer 3w can be from 6µm to 2.5mm; while when applied to sealing gaskets without batteries, the thickness of the information and heating layer 3w can be from 6 to 300µm.

[0085] In the first embodiment of the wireless information integration chip, in conjunction with Figure 7 As shown, the electromagnetic induction heating ring 32w surrounds the information area 31w in a planar view. The space between the electromagnetic induction heating ring 32w and the information area 31w is filled with an ITV, meaning there are no physical connecting elements (such as the physical connecting bridge 33w described later) between the electromagnetic induction heating ring 32w and the information area 31w. This ITV, which blocks heat conduction to the information area 31w, can be 0.1 to 3 mm. The electromagnetic induction heating ring 32w can be made of metal, such as aluminum, copper, gold, silver, or tin, but is not limited to these. From the viewpoint of the effect of generating heat under varying electromagnetic fields and cost, the electromagnetic induction heating ring 32w is preferably made of aluminum foil, and its thickness is preferably 6 to 40 µm.

[0086] In the first embodiment of the wireless information integration chip, in conjunction with Figure 8 As shown, the information area 31w includes a chip 311w and an antenna 312w. The chip 311w and antenna 312w can achieve wireless information transmission based on the RFID frequency band desired by the user. Regarding the chip 311w, it can have a unique identification code and can be selected according to the purpose. For example, the chip 311w can be a radio frequency identification near field communication (RFID_NFC) chip, a radio frequency identification high frequency (RFID_HF) chip, a radio frequency identification ultra-high frequency (RFID_UHF) chip, or a radio frequency identification microwave (RFID_MW) chip, etc., without particular limitation. Regarding the antenna 312w, its main function is to generate wirelessly transmitted signals. Its material can be metal, such as copper, silver, gold, tin, or aluminum, without particular limitation.

[0087] In the first embodiment of the wireless information integrated chip, the method for manufacturing the wireless information integrated chip roll is as follows: First, a composite adhesive (first adhesive layer 2w) is applied to the composite surface of the base film roll, and then it is laminated with the composite surface of the metal foil roll to produce a wireless information integrated chip blank roll. Second, the metal foil of the wireless information integrated chip blank roll is etched to electrically connect the antenna 312w and the chip 311w. Then, chip encapsulation protective adhesive is used to encapsulate the chip 311w and the chip connection part for protection using a dispensing machine to produce a wireless information integrated chip roll (i.e., the electromagnetic induction heating sheet roll mentioned above). At this time, the metal foil forms the information and heating layer 3w, and the wireless information integrated chip blank roll becomes the wireless information integrated chip roll. In addition, if a battery is to be added to the information and heating layer 3w, a welding machine or conductive adhesive can be used to process the battery cell and the chip 311w into an electrical connection.

[0088] The second implementation method of the wireless information integration chip: in conjunction with Figure 9 As shown, the difference between the second embodiment of the wireless information integration sheet and the first embodiment is that, in the second embodiment, in addition to the base film 1w, the first adhesive layer 2w, and the information and heating layer 3w described above, the wireless information integration sheet also includes a protective layer 5w and a second adhesive layer 4w. The protective layer 5w is located on the side of the information and heating layer 3w away from the base film 1w. The second adhesive layer 4w is located between the information and heating layer 3w and the protective layer 5w, and it is used to bond the information and heating layer 3w and the protective layer 5w.

[0089] In the second embodiment of the wireless information integrated sheet, the second adhesive layer 4w can be any material that can bond the information to the heating layer 3w and the protective layer 5w, such as dry composite glue, and is not particularly limited. The thickness of the second adhesive layer 4w can be 0.5 to 7 µm, preferably such that the peel strength between the two bonded layers is greater than 4 N / 15 mm. The second adhesive layer 4w can extend to fill the space between the electromagnetic induction heating ring 32w and the information area 31w to improve the overall structural strength of the wireless information integrated sheet.

[0090] In the second embodiment of the wireless information integrated sheet, the protective layer 5w is used to protect the information area 31w (i.e. the chip 311w, the antenna 312w, and the battery that can be additionally added) from damage by external forces that would affect its ability to transmit wireless information. The protective layer 5w can include at least one of a PET film, a PP film, a PE film, a PA film, a PVDC film, an EVOH film, a PEN film, and a PI film, and the thickness of the protective layer 5w can be 12 to 100 µm. In addition, either the upper surface or the lower surface of the protective layer 5w can be used as a printing surface.

[0091] Third embodiment of the wireless information integrated sheet: cooperation Figure 10 and Figure 11 As shown in the figure, the third embodiment of the wireless information integrated sheet differs from the first embodiment of the wireless information integrated sheet in that in the third embodiment of the wireless information integrated sheet, at least one physical connection bridge 33w is provided between the information area 31w and the electromagnetic induction heating ring 32w. The physical connection bridge 33w connects the information area 31w and the electromagnetic induction heating ring 32w, and the physical connection bridge 33w, the antenna 312w of the information area 31w, and the electromagnetic induction heating ring 32w can be integrally provided. The length of the physical connection bridge 33w can be 0.1 to 3 mm, and the width of the physical connection bridge 33w can be 0.01 to 5 mm. At this time, although the electromagnetic induction heating ring 32w and the information area 31w are in electrical communication through the physical connection bridge 33w, the distance for wireless communication is not significantly reduced.

[0092] The utility model still needs to explain, the non-stick area's section width W2 of lower surface of upper layer 100 can be greater than or equal to one sixth times of the section width W1 of single piece type sealing gasket of the utility model, and the non-stick area's section width W2 of lower surface of upper layer 100 can be less than or equal to five sixths times of the section width W1 of single piece type sealing gasket of the utility model, and then the merchant can adjust the coating range of release coating 220 according to actual demand, thereby further increasing the design flexibility of merchant. In addition, when the section width W1 of single piece type sealing gasket of the utility model is relatively large, the non-stick area's section width W2 at the lower surface of upper layer 100 can be small, and when the section width W1 of single piece type sealing gasket of the utility model is relatively small, the non-stick area's section width W2 at the lower surface of upper layer 100 can be large. Wherein, the section width W1 of single piece type sealing gasket of the utility model is one sixth times of the section width W2 of non-stick area of lower surface of upper layer 100. Figure 4 For explaining the embodiment of the non-stick area's section width W2 of lower surface of upper layer 100 is equal to one sixth times of the section width W1 of single piece type sealing gasket; the section width W1 of single piece type sealing gasket of the utility model is one sixth times of the section width W2 of non-stick area of lower surface of upper layer 100. Figure 5 For explaining the embodiment of the non-stick area's section width W2 of lower surface of upper layer 100 is equal to five sixths times of the section width W1 of single piece type sealing gasket.

[0093] The above embodiment and drawing are not limited to the product shape and style of the utility model, and any ordinary skilled person in the art can make appropriate changes or modifications, which should be considered as not departing from the patent scope of the utility model.

Claims

1. A single-piece sealing gasket, characterized in that: It includes an upper layer, a connecting layer, and an adhesive composite layer, which are sequentially combined from top to bottom; The sealing composite layer includes an electromagnetic induction heating layer and a sealing layer that are sequentially laminated from top to bottom; The upper layer includes a surface film, and the lower surface of the upper layer is divided into a non-adhesive area and a strong adhesive area; The bonding layer includes an adhesive and a release coating; the release coating is applied to the non-adhesive area of ​​the lower surface of the upper layer, and the bonding layer combines the strongly adhesive area of ​​the lower surface of the upper layer with the adhesive-sealing composite layer through the adhesive.

2. The single-piece sealing gasket as described in claim 1, characterized in that: The cross-sectional width of the non-adhesive area on the lower surface of the upper layer is greater than or equal to one-sixth of the cross-sectional width of the single-piece sealing gasket, and the cross-sectional width of the non-adhesive area on the lower surface of the upper layer is less than or equal to five-sixths of the cross-sectional width of the single-piece sealing gasket.

3. The single-piece sealing gasket as described in claim 1, characterized in that: The release coating is made of varnish or silicone oil.

4. The single-piece sealing gasket as described in claim 1, characterized in that: The release coating is applied either in a full-area coating or a dot-area coating.

5. The single-piece sealing gasket as described in claim 1, characterized in that: The adhesive composite layer also includes a connecting film, which is disposed above the electromagnetic induction heating layer; The connecting membrane includes at least one of PE membrane, PP membrane, PA membrane, EPP membrane and EPE membrane.

6. The single-piece sealing gasket as described in claim 1, characterized in that: The adhesive composite layer also includes a composite film, which is disposed above the electromagnetic induction heating layer. The composite film includes at least one of PET film, PEN film, PP film, PA film and PE film.

7. The single-piece sealing gasket as described in any one of claims 1 to 6, characterized in that: The surface film includes at least one of PP film, PET film, PE film, PA film and EMAC film.

8. The single-piece sealing gasket as described in any one of claims 1 to 6, characterized in that: The sealing layer is a hot melt adhesive; the material of the hot melt adhesive is one of EVA, PIB, EBA, EAA, EMAA, EMAC, polyacrylate, and acrylic copolymer.

9. The single-piece sealing gasket as described in any one of claims 1 to 6, characterized in that: The sealing layer includes a sealing film and an adhesive; the sealing film includes at least one of PE film, PP film, PA film, PVDC film, EVOH film and PET film; the adhesive is disposed between the sealing film and the electromagnetic induction heating layer.

10. The single-piece sealing gasket as described in any one of claims 1 to 6, characterized in that: The adhesive is a dry composite adhesive or a hot melt laminate, and the hot melt laminate is made of one of the following materials: PE, PP, EMAC, EMAA, EAA, EEA, and EMMA.

11. The single-piece sealing gasket as described in any one of claims 1 to 6, characterized in that: The electromagnetic induction heating layer is made of aluminum foil.

12. The single-piece sealing gasket as described in any one of claims 1 to 6, characterized in that: The electromagnetic induction heating layer uses a wireless information integrated chip; The wireless information integrated chip includes a base film, an information and heating layer, and a first adhesive layer; the information and heating layer includes an information area and an electromagnetic induction heating ring; the information area has an antenna and a chip that are interconnected, the electromagnetic induction heating ring surrounds the information area, and the first adhesive layer is located between the base film and the information and heating layer.

13. The single-piece sealing gasket as described in claim 12, characterized in that: The wireless information integrated sheet also includes a protective layer and a second adhesive layer. The protective layer is located on the side of the information and heating layer away from the base film, and the second adhesive layer is located between the information and heating layer and the protective layer.

14. The single-piece sealing gasket as described in claim 12, characterized in that: There is a gap between the electromagnetic induction heating ring and the information area.

15. The single-piece sealing gasket as described in claim 14, characterized in that: The distance between the electromagnetic induction heating ring and the information area is 0.1 mm to 3 mm.

16. The single-piece sealing gasket as described in claim 14, characterized in that: The electromagnetic induction heating ring and the information area are filled with gaps.

17. The single-piece sealing gasket as described in claim 14, characterized in that: The information and heating layer also includes at least one physical connection bridge that connects the information area to the electromagnetic induction heating ring.

18. The single-piece sealing gasket as described in claim 1, characterized in that: The adhesive provides a peel strength greater than or equal to 17.8 N / 15 mm between the strong adhesion zone on the lower surface of the upper layer and the adhesive-sealed composite layer.

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