Single-piece type sealing gasket

Abstract

The invention 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 invention relates to the field of sealing gaskets, in particular to a single-piece sealing gasket. Background Art

[0002] In order to prevent the contents of packaging containers (such as beverage cans and medicine cans) from leaking out and being affected by the external environment and deteriorating, 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 effect of preventing the contents from leaking out and sealing and preserving the contents can be achieved.

[0003] Existing sealing gaskets generally refer to sealing gaskets including aluminum foil. In order to improve the convenience of tearing off the sealing gasket, some sealing gaskets are configured with a pull-valve film structure, or some unbonded areas are reserved in the sealing gasket. However, in actual use, the pull-valve film or the unbonded area often have adhesion problems, making it inconvenient for users to quickly peel off the sealing gasket by pulling the valve film or the unbonded area.

[0004] In view of the existence of the above problems, it is necessary to study a single-piece sealing gasket that is easy to open. Summary of the invention

[0005] The object of the present invention is to provide a single-piece sealing gasket which is easy to open.

[0006] In order to achieve the above object, the solution of the present invention is: A single-piece sealing gasket comprises an upper layer, a connecting layer and a sealing composite layer which are compounded in sequence from top to bottom; the sealing composite layer comprises an electromagnetic induction heating layer and a sealing layer which are compounded in sequence from top to bottom; the upper layer comprises a surface film, and the lower surface of the upper layer is divided into a non-adhesive area and a strong adhesive area; the connecting layer comprises 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 connecting layer compounds the strong adhesive area of ​​the lower surface of the upper layer with the sealing composite layer through an adhesive.

[0007] 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.

[0008] The release coating is made of varnish or silicone oil, and has a thickness of 0.5 to 20 μm.

[0009] The release coating is applied in a full-coat or dot-coat manner.

[0010] The adhesive sealing composite layer also includes a connecting film, which is arranged above the electromagnetic induction heating layer; the connecting film includes 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 connecting film is 12 to 200 μm.

[0011] The upper layer also includes a first connecting film, which is arranged below the surface film; the first connecting film includes 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 connecting film is 12 to 100µm; the adhesive sealing composite layer also includes a second connecting film, which is arranged above the electromagnetic induction heating layer; the second connecting film includes 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 is 12 to 200µm.

[0012] The adhesive sealing composite layer also includes a thickening layer, which is arranged above the electromagnetic induction heating layer; the material of the thickening layer is at least one of EPE, EPP, PE, PP and paper, and the thickness of the thickening layer is 60 to 3000µm.

[0013] The sealing composite layer also includes a composite film, which is arranged above the electromagnetic induction heating layer; the composite film includes at least one of a PET film, a PEN film, a PP film, a PA film and a PE film, and the thickness of the composite film is 12 to 100 μm.

[0014] The surface film comprises at least one of PP, PET, PE, PA and EMAC films, and the thickness of the surface film is 12 to 150 μm.

[0015] 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, and the thickness of the hot melt adhesive is 4 to 100 µm.

[0016] The sealing layer includes a sealing film and an adhesive, wherein the sealing film includes at least one of a PE film, a PP film, a PA film, a PVDC film, an EVOH film and a PET film, and the thickness of the sealing film is 12 to 100 µm; the adhesive is arranged between the sealing film and the electromagnetic induction heating layer.

[0017] The adhesive is a dry composite adhesive or a hot-melt laminating adhesive. The material of the hot-melt laminating adhesive is one of PE, PP, EMAC, EMAA, EAA, EEA and EMMA. The thickness of the hot-melt laminating adhesive is 4 to 60 µm.

[0018] The electromagnetic induction heating layer is made of aluminum foil.

[0019] The electromagnetic induction heating layer adopts a wireless information integrated sheet; the wireless information integrated sheet 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 connected to each other, 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.

[0020] 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.

[0021] There is a gap between the electromagnetic induction heating ring and the information area.

[0022] The interval between the electromagnetic induction heating ring and the information area is 0.1 mm to 3 mm.

[0023] There is a full space between the electromagnetic induction heating ring and the information area.

[0024] The information and heating layer also includes at least one physical connection bridge, which connects the information area and the electromagnetic induction heating ring.

[0025] The adhesive enables the peeling strength between the strong adhesive area on the lower surface of the upper layer and the adhesive sealing composite layer to be greater than or equal to 17.8N / 15mm.

[0026] After adopting the above scheme, the present invention can ensure that the non-sticky area of ​​the upper layer and the adhesive composite layer are composited with each other but can be easily peeled off by the release coating. The release coating also ensures that the non-sticky area of ​​the upper layer and the adhesive composite layer will not adhere to each other, so that the user can easily peel off the part of the single-piece sealing gasket of the present invention that is on the upper side of the non-sticky area of ​​the upper layer with his hands without the help of external objects, so that the user can easily peel off the single-piece sealing gasket of the present invention by applying force on the part of the single-piece sealing gasket of the present invention that is on the upper side of the non-sticky area of ​​the upper layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of a single-piece sealing gasket according to Embodiment 1 of the present invention.

[0028] Figure 2 It is a schematic diagram of a single-piece sealing gasket according to the second embodiment of the present invention.

[0029] Figure 3 It is a schematic diagram of a single-piece sealing gasket according to the third embodiment of the present invention.

[0030] Figure 4 The side view of the single-piece sealing gasket of the present invention is Figure 1 .

[0031] Figure 5 The side view of the single-piece sealing gasket of the present invention is Figure 2 .

[0032] Figure 6 It is a cross-sectional schematic diagram of the first embodiment of the wireless information integrated chip of the present invention.

[0033] Figure 7 This is a plan view of the information and heating layer of the first embodiment of the wireless information integrated sheet of the present invention.

[0034] Figure 8 This is a plan view of the information area of ​​the first embodiment of the wireless information integrated sheet of the present invention.

[0035] Fig. 9 It is a cross-sectional schematic diagram of a second embodiment of the wireless information integrated chip of the present invention.

[0036] Fig.10 This is a plan view of the information and heating layer of the third embodiment of the wireless information integrated sheet of the present invention.

[0037] Fig.11 This is a schematic plan view of the information area of ​​the third embodiment of the wireless information integrated chip of the present invention.

[0038] Description of labels: Upper layer 100, surface film 110, first connecting film 120, Tie layer 200, adhesive 210, release coating 220, Sealing composite layer 300, electromagnetic induction heating layer 310, sealing layer 320, sealing film 321, adhesive 322, connecting film 330, composite film 340, second connecting film 350, thickening layer 360, Adhesive a, 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, spacer ITV. DETAILED DESCRIPTION

[0039] In order to further explain the technical solution of the present invention, the present invention is described in detail below through specific embodiments.

[0040] Embodiment 1: Cooperate Figure 1 As shown, in the first embodiment of the present invention, the single-piece sealing gasket of the present invention comprises an upper layer 100, a connecting layer 200 and a sealing composite layer 300 which are compounded in sequence from top to bottom.

[0041] In the first embodiment of the present invention, the upper layer 100 is disposed on the uppermost layer of the single-piece sealing gasket of the present invention, and the lower surface of the upper layer 100 is divided into a non-adhesive area and a strong adhesive area. Figure 1 As shown, the upper layer 100 includes a surface film 110, which is used as the uppermost layer (i.e., the surface layer) of the single-piece sealing gasket of the present invention. The upper surface and / or the lower surface of the surface film 110 can be a printing surface, which can be used to print different patterns. The 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 150µm. Within this range, the surface film 110 has a greater tensile strength, a smooth surface, and better glossiness; in addition, when the bottom of the single-piece sealing gasket of the present invention feels heat conduction, the surface film 110 can be prevented from being bonded to other external elements (such as bottle caps, etc.).

[0042] In the first embodiment of the present invention, the bonding layer 200 is disposed between the upper layer 100 and the adhesive composite layer 300. Figure 1 As shown, the connecting layer 200 includes an adhesive 210 and a release coating 220, and 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 is used to compound the strong adhesive area on the surface of the upper layer 100 with the adhesive sealing composite layer 300 through the adhesive 210. Among them, the release coating 220 can ensure that the non-adhesive area of ​​the upper layer 100 and the adhesive sealing composite layer 300 are in a state of being compounded with each other but can be easily pulled apart, and the release coating 220 also ensures that the non-adhesive area of ​​the upper layer 100 and the adhesive sealing composite layer 300 will not be adhered, so that the user can easily open the part of the single-piece sealing gasket of the present invention on the upper side of the non-adhesive area of ​​the upper layer 100 by hand without the help of external objects, so that the user can easily open the single-piece sealing gasket of the present invention by applying force on the part of the single-piece sealing gasket of the present invention on the upper side of the non-adhesive area of ​​the upper layer 100. In some embodiments, the single-piece sealing gasket of the present invention can make the peel strength between the strong adhesive area on 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 stabilize the composite upper layer 100 and the sealing composite layer 300; the adhesive 210 can be a bonding glue that can make the peel 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 adhesive; the adhesive 210 can also be a hot melt laminating adhesive, and the material of the hot melt laminating adhesive can be one of PE, PP, EMAC, EMAA, EAA, EEA and EMMA, and the thickness of the hot melt laminating adhesive is preferably 4 to 60µm.

[0043] It should be further explained that when the thickness of the upper layer 100 and the adhesive composite layer 300 becomes thinner and thinner, after electromagnetic induction sealing, the pull-valve film of the conventional sealing gasket tends to be bonded to the film below it, which makes it difficult for the user to open the pull-valve film. The material of the release coating 220 of the present invention can be, for example, varnish or silicone oil, and the thickness of the release coating 220 is preferably 0.5 to 20µm. Since the lower surface of the upper layer 100 is coated with varnish or silicone oil (i.e., the release coating 220), the user can easily use his fingers to open the part of the single-piece sealing gasket of the present invention that is on the upper side of the non-adhesive area of ​​the upper layer 100, thereby ensuring that the user can directly pinch the part of the single-piece sealing gasket of the present invention that is on the upper side of the non-adhesive area of ​​the upper layer 100 by hand without the help of external objects and easily uncover the single-piece sealing gasket of the present invention. 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 electromagnetic induction sealing, the trace amount of air between the dot matrix of the single-piece sealing gasket of the present invention where the varnish or silicone oil is dotted will be heated and expanded by the electromagnetic induction sealing, which will cause the portion of the single-piece sealing gasket of the present invention on the upper side of the non-adhesive area of ​​the upper layer 100 to be pushed upward, thereby ensuring that the portion of the single-piece sealing gasket of the present invention on the upper side of the non-adhesive area of ​​the upper layer 100 is separated from the adhesive composite layer 300, so that the user can more easily use his fingers to open the portion of the single-piece sealing gasket of the present invention on the upper side of the non-adhesive area of ​​the upper layer 100, thereby ensuring that the user can directly pinch the portion of the single-piece sealing gasket of the present invention on the upper side of the non-adhesive area of ​​the upper layer 100 with his hands without the help of external objects and easily uncover the single-piece sealing gasket of the present invention.

[0044] In the first embodiment of the present invention, the adhesive sealing composite layer 300 is arranged at the bottom layer of the single-piece sealing gasket of the present invention. Figure 1As shown, the sealing composite layer 300 includes an electromagnetic induction heating layer 310 and a sealing layer 320 which are sequentially composited from top to bottom. The electromagnetic induction heating layer 310 can be an aluminum foil or a wireless information integrated sheet. Aluminum foil is an existing structure in the conventional sealing gasket. The thickness of the aluminum foil is preferably 10 to 40 μm, so that the barrier function of moisture and oxygen can be enhanced, and the effect of preventing the leakage of the contents and sealing and preserving the contents can be produced. The present invention 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 and reduce energy consumption; in addition, through the wireless information integrated sheet, the present invention can increase the function of wireless information transmission, reduce the waste of aluminum foil materials, 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, greatly improve the automation, digitization and intelligent development of factories, warehouses, logistics, stores, and unmanned cashier management. The thickness of the wireless information integrated sheet is preferably 27 μm to 2.5 mm.

[0045] The adhesive layer 320 is mainly used to seal the container mouth. In the first embodiment of the present invention, the adhesive layer 320 can be a hot melt adhesive, and the material of the hot melt adhesive can be one of EVA, PIB, EBA, EAA, EMAC, polyacrylate, acrylic copolymer and EMAA, whichever is easy to open from the bottle mouth or easy to open cleanly from the bottle mouth. The thickness of the hot melt adhesive is preferably 4 to 100µm. The hot melt adhesive can achieve a continuous sealing effect even when the contents of the packaging container contain water, and can also achieve a continuous sealing effect even when the contents of the packaging container contain chili, garlic, fermented bean curd, honey, and spicy additives.

[0046] Embodiment 2: Cooperate Figure 2 As shown, the difference between the second embodiment of the present invention and the first embodiment lies in the difference in the adhesive sealing composite layer 300 .

[0047] Specifically, in the second embodiment of the present invention, the sealing composite layer 300 includes an electromagnetic induction heating layer 310 and a sealing layer 320 which are sequentially laminated from top to bottom; wherein, the sealing layer 320 of the sealing composite layer 300 includes a sealing film 321 and an adhesive 322, and the adhesive 322 is arranged between the sealing film 321 and the electromagnetic induction heating layer 310; the material of the sealing film 321 can be at least one selected from the group consisting of PE, PP, PA, PVDC, EVOH and PET, which can be easily opened from the bottle mouth after electromagnetic induction sealing or easily opened cleanly from the bottle mouth, and the thickness of the sealing film 321 is preferably 12 to 100µm; and the adhesive 322 can be, for example, composite glue, etc., but is not limited thereto.

[0048] In the second embodiment of the present invention, the adhesive composite layer 300 further includes a bonding film 330 and a composite film 340. The bonding film 330 is disposed above the electromagnetic induction heating layer 310. In other words, the bonding film 330 can be directly composited above the electromagnetic induction heating layer 310, or the bonding film 330 can be indirectly composited above the electromagnetic induction heating layer 310 (i.e., other structures are configured between the bonding film 330 and the electromagnetic induction heating layer 310). Figure 2 As shown, the connecting film 330 is arranged on the uppermost layer of the adhesive composite layer 300, and is used to be composited with the surface film 110 of the upper layer 100, that is, the connecting film 330 is composited with the surface film 110 of the upper layer 100 through the adhesive 210. The connecting film 330 may 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 connecting film 330 is preferably 12 to 200 μm, thereby improving the peel strength after the composite between the connecting 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 connecting film 330 and the electromagnetic induction heating layer 310. The composite film 340 is used to improve the tensile strength of the single-piece sealing gasket of the present invention. The composite film 340 may include at least one of a PET film, a PA film and a PP film, and the thickness of the composite film 340 is preferably 12 to 100 μm.

[0049] In the second embodiment of the present invention, the bonding film 330 and the composite film 340 and the electromagnetic induction heating layer 310 and the composite film 340 can be bonded using adhesive a. In some embodiments, adhesive a can be a composite adhesive that can make the peel strength between the two bonded layers (for example, the bonding 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 4N / 15mm, but is not limited thereto.

[0050] In the second embodiment of the present invention, the manufacturing method of the single-piece sealing gasket of the present invention may be: First, an adhesive is applied to the lower surface of the composite film roll, so that the lower surface of the composite film roll and the upper surface of the electromagnetic induction heating layer roll are dry-laminated, and then placed in a maturing chamber for more than 24 hours to make a first composite roll; Secondly, the non-sticky area on the lower surface of the surface film roll is coated with varnish or silicone oil in a full coating or dot coating manner to make a functional layer roll; Then, an adhesive is applied to the composite film surface of the first composite part roll material, so that the composite film surface of the first composite part roll material and the lower surface of the connecting film roll material are dry-compounded, and the roll material is placed in a maturation chamber for more than 24 hours to produce a second composite part roll material; Next, apply adhesive on the electromagnetic induction heating surface of the second composite part roll, dry-compound the electromagnetic induction heating surface of the second composite part roll with the adhesive film roll, and put it into the aging chamber for more than 24 hours to make the lower composite part roll. Alternatively, apply hot melt adhesive on the composite film surface of the second composite part roll to make the lower composite part roll; Next, an adhesive is applied to the connecting film surface of the lower composite part coil, so that the connecting film surface of the lower composite part coil and the lower surface of the functional layer coil are dry-compounded, and then placed in a curing chamber for more than 24 hours to produce a single-piece sealing gasket coil; Finally, the single-piece sealing gasket is cut into a suitable size according to the needs of the user.

[0051] Embodiment three: Cooperate Figure 3 As shown, the difference between the third embodiment of the present invention and the first embodiment lies in the difference between the upper layer 100 and the adhesive composite layer 300 .

[0052] Specifically, in the third embodiment of the present invention, the upper layer 100 includes a surface film 110 and a first connecting film 120; the first connecting film 120 is arranged below the surface film 110, in other words, the first connecting film 120 can be directly compounded below the surface film 110, and the first connecting film 120 can also be indirectly compounded below the surface film 110 (that is, other structures are arranged between the surface film 110 and the first connecting film 120). The adhesive composite layer 300 includes a second connecting film 350, a thickening layer 360, an electromagnetic induction heating layer 310 and an adhesive layer 320 compounded in sequence from top to bottom.

[0053] In the third embodiment of the present invention, Figure 3 As shown, the first connecting film 120 is disposed at the bottom layer of the upper layer 100, and the first connecting film 120 is used to be combined with the adhesive composite layer 300; specifically, the first connecting film 120 is combined with the adhesive composite layer 300 through the adhesive 210. The first connecting film 120 may 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 connecting film 120 is preferably 12 to 100 μm; thereby, the peel strength between the first connecting film 120 and the adhesive composite layer 300 after combination can be improved.

[0054] In the third embodiment of the present invention, Figure 3 As 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, or the second connecting film 350 can be indirectly compounded above the electromagnetic induction heating layer 310 (that is, other structures are configured between the second connecting film 350 and the electromagnetic induction heating layer 310). Figure 3As shown, the second connecting film 350 is arranged on the topmost layer of the adhesive composite layer 300, and is used to be composited with the upper layer 100; specifically, the second connecting film 350 is composited with the first connecting film 120 of the upper layer 100 through the adhesive 210; the second connecting film 350 may include at least one of PE film, PP film, PA film, EPP film and EPE film, and the thickness of the second connecting film 350 is preferably 12 to 200µm; thereby, the peel strength between the second connecting film 350 and the first connecting film 120 of the upper layer 100 after composite can be improved.

[0055] In the third embodiment of the present invention, 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 invention. 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 invention can be increased.

[0056] In the third embodiment of the present invention, adhesive a can be used to compound between the second connecting film 350 and the thickening layer 360, and between the thickening layer 360 and the electromagnetic induction heating layer 310. Adhesive a can be a composite glue that can make the peel strength between the two composite 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 4N / 15mm, but is not limited to this. In addition, adhesive a can be used to compound between the surface film 110 and the first connecting film 120, and adhesive a can be a composite glue that can make the peel strength between the two composite layers (for example, the surface film 110 and the first connecting film 120) greater than or equal to 4N / 15mm, but is not limited to this.

[0057] In the third embodiment of the present invention, the manufacturing method of the single-piece sealing gasket of the present invention may be: First, an adhesive is applied to the lower surface of the surface film roll, and the composite surface of the surface film roll is dry-laminated with the upper surface of the first connecting film roll, and then placed in a maturing chamber for more than 24 hours to produce an upper composite roll; Secondly, the non-adhesive area of ​​the first connecting film surface of the upper composite part roll is coated with varnish or silicone oil in a full coating or dot coating manner to make a functional layer roll; Then, an adhesive is applied to the upper surface of the electromagnetic induction heating layer coil, so that the electromagnetic induction heating layer coil and the lower surface of the thickening layer coil are dry-compounded, and the coil is placed in a aging chamber for more than 24 hours to produce a first composite coil; Next, an adhesive is applied to the thickened surface of the first composite part roll material, so that the thickened surface of the first composite part roll material and the lower surface of the second connecting film roll material are dry-laminated, and the roll material is placed in a aging chamber for more than 24 hours to produce a second composite part roll material; Next, apply adhesive on the electromagnetic induction heating surface of the second composite coil, dry-compound the electromagnetic induction heating surface of the second composite coil with the composite surface of the adhesive film coil, and place it in a aging chamber for more than 24 hours to make the lower composite coil. Alternatively, apply hot melt adhesive on the electromagnetic induction heating surface of the second composite coil to make the lower composite coil; Next, an adhesive is applied to the second connecting film surface of the lower composite part coil, so that the second connecting film surface of the lower composite part coil and the first connecting film surface of the functional layer coil are dry-compounded, and then placed in a maturing chamber for more than 24 hours to produce a single-piece sealing gasket coil; Finally, the single-piece sealing gasket is cut into a suitable size according to the needs of the user.

[0058] To facilitate understanding of the wireless information integrated chip of the present invention, the implementation of the wireless information integrated chip is introduced below.

[0059] The first implementation method of wireless information integrated chip: cooperation Figures 6 to 8 As shown, in the first embodiment of the wireless information integrated sheet, the wireless information integrated sheet includes 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.

[0060] 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 may 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 longitudinal tensile strength of the base film 1w is relatively large. 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.

[0061] In the first embodiment of the wireless information integrated sheet, the first adhesive layer 2w is a layer used to bond the base film 1w and the information and heating layer 3w. The first adhesive layer 2w only needs to be able to bond the base film 1w and the information and heating layer 3w, and its material can be, for example, composite glue. The thickness of the first adhesive layer 2w can be 0.5 to 7µm, and the first adhesive layer 2w can make the peel strength between the two bonded layers of material greater than 4N / 15mm.

[0062] In the first embodiment of the wireless information integrated sheet, 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 and writing transmission, so as to facilitate subsequent product traceability. Among them, the information area 31w has an antenna 312w and a chip 311w that are mutually conductive. The electromagnetic induction heating ring 32w can pass through the electromagnetic field generated by the electromagnetic induction sealing machine, and use electromagnetic induction to heat it, so that the adhesive layer 320 of the present invention is heated and melted and adhered to the container mouth of the packaging container, and then it can be used as an electromagnetic induction sealing gasket to seal the container mouth. The wireless information integrated sheet of the present invention can heat up most of the electromagnetic induction heating ring 32w, and only conduct very little heat in at least one physical connection bridge 33w between the antenna 312w and the electromagnetic induction heating ring 32w. Among them, the length of the physical connection bridge 33w can be 0.1 to 3mm, the width of the physical connection bridge 33w can be 0.01 to 5mm, and the material of the physical connection bridge 33w can be the same as that of the antenna 312w. In this way, the heat during electromagnetic induction sealing can be blocked from being transferred to the central area of ​​the sealing gasket, and energy waste can be saved. In addition, when applied to a sealing gasket containing a battery, the thickness of the information and heating layer 3w can be 6µm to 2.5mm; and when applied to a sealing gasket without a battery, the thickness of the information and heating layer 3w can be 6 to 300µm.

[0063] In the first embodiment of the wireless information integrated chip, Figure 7 As shown, the electromagnetic induction heating ring 32w surrounds the information area 31w in a planar perspective, and there is a gap ITV between the electromagnetic induction heating ring 32w and the information area 31w, that is, there is no physical connection element (such as the physical connection bridge 33w described later) between the electromagnetic induction heating ring 32w and the information area 31w. Thereby, there is a gap ITV between the electromagnetic induction heating ring 32w and the information area 31w, and the gap ITV can block the heat from being conducted to the information area 31w. The gap ITV (the distance between the outermost edge of the information area 31w and the innermost edge of the electromagnetic induction heating ring 32w) can be 0.1 to 3mm. The material of the electromagnetic induction heating ring 32w can be metal, such as aluminum, copper, gold, silver, or tin, but not limited thereto. From the perspective of the effect of generating heat when subjected to a changing electromagnetic field and the cost, the electromagnetic induction heating ring 32w is preferably aluminum foil, and its thickness is preferably 6 to 40µm.

[0064] In the first embodiment of the wireless information integrated chip, Figure 8As shown, the information area 31w includes a chip 311w and an antenna 312w, and the chip 311w and the antenna 312w can realize the wireless information transmission function based on the RFID frequency band that the user wants to use. As for the chip 311w, it can have a unique identification code, which 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 special restrictions. As for the antenna 312w, it mainly generates a signal that can be transmitted wirelessly, and its material can be metal, such as copper, silver, gold, tin or aluminum, etc., without special restrictions.

[0065] In the first embodiment of the wireless information integrated sheet, the method for making the wireless information integrated sheet coil can be as follows: first, apply a composite glue (first adhesive layer 2w) on the composite surface of the base film coil, and compound it with the composite surface of the metal foil coil to make a wireless information integrated sheet blank coil. Secondly, the metal foil of the wireless information integrated sheet blank coil is etched, the antenna 312w and the chip 311w are electrically connected (Bonding), and then the chip 311w and the chip connection part are encapsulated with chip encapsulation protective glue by a dispensing machine to protect the chip 311w and the chip connection part, and a wireless information integrated sheet coil (i.e., the above-mentioned electromagnetic induction heating sheet coil) is made. At this time, the metal foil forms the information and heating layer 3w, and the wireless information integrated sheet blank coil becomes a wireless information integrated sheet coil. In addition, if you want to add a battery to the information and heating layer 3w, you can use a welding machine or conductive glue to process the battery cell and the chip 311w into an electrical connection.

[0066] The second implementation method of wireless information integrated chip: Fig. 9 As shown, the difference between the second embodiment of the wireless information integrated sheet and the first embodiment of the wireless information integrated sheet is that in the second embodiment of the wireless information integrated sheet, in addition to the above-mentioned base film 1w, the first adhesive layer 2w and the information and heating layer 3w, the wireless information integrated sheet also includes a protective layer 5w and a second adhesive layer 4w. Among them, 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 is a layer used to connect the information and heating layer 3w and the protective layer 5w.

[0067] In the second embodiment of the wireless information integrated sheet, the second adhesive layer 4w can be used as long as it can bond the information to the heating layer 3w and the protective layer 5w. Its material can be, for example, dry composite adhesive, and is not particularly limited. The thickness of the second adhesive layer 4w can be 0.5 to 7µm, and it is preferably such that the peel strength between the two layers of material bonded is greater than 4N / 15mm. The second adhesive layer 4w can extend to fill the gap between the electromagnetic induction heating ring 32w and the information area 31w to enhance the overall structural strength of the wireless information integrated sheet.

[0068] In the second embodiment of the wireless information integrated chip, 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 added) from being damaged by external forces and affecting its wireless information transmission capability. The protective layer 5w may include at least one of PET film, PP film, PE film, PA film, PVDC film, EVOH film, PEN film, and PI film. The thickness of the protective layer 5w may be 12 to 100µm. In addition, the upper surface or the lower surface of the protective layer 5w may be used as a printing surface.

[0069] The third implementation method of wireless information integrated chip: Fig.10 and Fig.11 As shown, the difference between the third embodiment of the wireless information integrated sheet and the first embodiment of the wireless information integrated sheet is 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, the physical connection bridge 33w, the antenna 312W of the information area 31w and the electromagnetic induction heating ring 32w can be integrally arranged, the length of the physical connection bridge 33w can be 0.1 to 3mm, and the width of the physical connection bridge 33w can be 0.01 to 5mm. At this time, although the electromagnetic induction heating ring 32w is electrically connected to the information area 31w through the physical connection bridge 33w, the distance of wireless communication will not be reduced too much.

[0070] The present invention also needs to explain that the cross-sectional width W2 of the non-sticky area on the lower surface of the upper layer 100 can be greater than or equal to one-sixth of the cross-sectional width W1 of the single-piece sealing gasket of the present invention, and the cross-sectional width W2 of the non-sticky area on the lower surface of the upper layer 100 can be less than or equal to five-sixths of the cross-sectional width W1 of the single-piece sealing gasket of the present invention, thereby allowing manufacturers to adjust the coating range of the release coating 220 according to actual needs, thereby further increasing the manufacturer's design flexibility. In addition, when the cross-sectional width W1 of the single-piece sealing gasket of the present invention is relatively large, the cross-sectional width W2 of the non-sticky area at the lower surface of the upper layer 100 can be smaller; and when the cross-sectional width W1 of the single-piece sealing gasket of the present invention is relatively small, the cross-sectional width W2 of the non-sticky area at the lower surface of the upper layer 100 can be larger. Among them, the cross-sectional width W1 of the present invention Figure 4 The embodiment used to illustrate that the cross-sectional width W2 of the non-adhesive area on the lower surface of the upper layer 100 is equal to one sixth of the cross-sectional width W1 of the single-piece sealing gasket; Figure 5 This is used to illustrate an implementation aspect in which the cross-sectional width W2 of the non-adhesive area on the lower surface of the upper layer 100 is equal to five sixths of the cross-sectional width W1 of the single-piece sealing gasket.

[0071] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A single-piece sealing gasket, characterized in that: It includes an upper layer, a connecting layer and a bonding composite layer which are compounded in sequence from top to bottom; The sealing composite layer comprises an electromagnetic induction heating layer and a sealing layer which are laminated in sequence 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 connecting layer includes adhesive and release coating; the release coating is coated on the non-adhesive area on the lower surface of the upper layer, and the connecting layer composites the strong adhesive area on the lower surface of the upper layer with the adhesive composite layer through the adhesive.

2. The single-piece sealing gasket according to 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 according to claim 1, characterized in that: The release coating is made of varnish or silicone oil.

4. The single-piece sealing gasket according to claim 1, characterized in that: The release coating is applied in a full-coat or dot-coat manner.

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

6. The single-piece sealing gasket according to claim 1, characterized in that: The sealing composite layer further comprises a composite film, and the composite film is arranged above the electromagnetic induction heating layer; The composite film comprises at least one of a PET film, a PEN film, a PP film, a PA film and a PE film.

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

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

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

11. The single-piece sealing gasket according to 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 according to any one of claims 1 to 6, characterized in that: The electromagnetic induction heating layer adopts a wireless information integrated chip; The wireless information integrated sheet 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 connected to each other, 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 according to 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 according to 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 according to claim 14, characterized in that: The interval between the electromagnetic induction heating ring and the information area is 0.1 mm to 3 mm.

16. The single-piece sealing gasket according to claim 14, characterized in that: There is a full space between the electromagnetic induction heating ring and the information area.

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

18. The single-piece sealing gasket according to claim 1, characterized in that: The adhesive enables the peeling strength between the strong adhesive area on the lower surface of the upper layer and the adhesive sealing composite layer to be greater than or equal to 17.8N / 15mm.

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