Single-piece sealing gasket

Abstract

Disclosed in the present invention is a single-piece sealing gasket, comprising an upper layer, a bonding layer and an adhesive sealing composite layer laminated in sequence. The adhesive sealing composite layer comprises an electromagnetic induction heating layer and an adhesive sealing layer laminated in sequence. The lower surface of the upper layer is divided into a non-adhesive region and a strong-adhesive region. The bonding layer comprises an adhesive and a release coating, wherein the release coating is applied to the non-adhesive region of the upper layer, and the bonding layer bonds the strong-adhesive region of the upper layer to the adhesive sealing composite layer via the adhesive. The single-piece sealing gasket of the present invention is easy to open.

Description

Single-piece sealing gasket Technical Field

[0001] This invention relates to the field of sealing gaskets, and in particular to a single-piece sealing gasket. Background Technology

[0002] To prevent the contents of packaging containers (such as beverage cans and medicine cans) from leaking out and deteriorating due to external environmental influences, sealing gaskets are used to seal the opening of the packaging containers. By using sealing gaskets to tightly seal the opening of the containers, the effects of preventing leakage of the contents and sealing and preserving the contents can be achieved.

[0003] Existing sealing gaskets generally refer to sealing gaskets that include aluminum foil. In order to improve the ease of tearing open the sealing gasket, some sealing gaskets are equipped with a flap structure or retain a part of the unbonded area in the sealing gasket. However, in actual use, the flap or the unbonded area often stick together, making it inconvenient for users to quickly peel off the sealing gasket by pulling the flap or the unbonded area.

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

[0005] The purpose of this invention is to provide a single-piece sealing gasket that is easy to open.

[0006] To achieve the above objectives, the solution of the present invention is:

[0007] A single-piece sealing gasket includes an upper layer, a connecting layer, and an adhesive composite layer sequentially laminated from top to bottom; the adhesive composite layer includes an electromagnetic induction heating layer and an adhesive layer 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 strongly adhesive area; the connecting 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 connecting layer laminates the strongly adhesive area of ​​the lower surface of the upper layer with the adhesive composite layer through the adhesive.

[0008] 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.

[0009] The release coating is made of varnish or silicone oil, and the thickness of the release coating is 0.5 to 20 µm.

[0010] The release coating is applied either in a full-area coating or a dot-area coating.

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

[0012] The upper layer further includes a first connecting film disposed below the surface film; the first connecting film includes 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 composite layer further includes a second connecting film disposed above the electromagnetic induction heating layer; the second connecting film includes 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 composite layer further includes 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 3000µm.

[0014] The adhesive composite layer further includes a composite film 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, and the thickness of the composite film is 12 to 100 µm.

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

[0016] The sealing layer is a hot melt adhesive, which is made of one of the following materials: 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 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, and the thickness of the sealing film is 12 to 100 µm. The adhesive is disposed between the sealing film and the electromagnetic induction heating layer.

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

[0019] The electromagnetic induction heating layer is made of aluminum foil.

[0020] The electromagnetic induction heating layer adopts 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 mutually connected, 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 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.

[0022] There is a gap between the electromagnetic induction heating ring and the information area.

[0023] The distance 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 gaps.

[0025] The information and heating layer also includes at least one physical connection bridge that connects the information area to the electromagnetic induction heating ring.

[0026] 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.

[0027] By adopting the above solution, the present invention can ensure that the non-adhesive area of ​​the upper layer and the adhesive composite layer are in a state of being combined but can be easily peeled apart by means of the release coating. The release coating also ensures that the non-adhesive area of ​​the upper layer and the adhesive composite layer will not stick together, so that the user can easily peel off the part of the single-piece sealing gasket above the non-adhesive area of ​​the upper layer by hand without the aid of external objects. The user can easily peel off the single-piece sealing gasket of the present invention by applying force to the part of the single-piece sealing gasket above the non-adhesive area of ​​the upper layer. Attached Figure Description

[0028] Figure 1 is a schematic diagram of a single-piece sealing gasket according to Embodiment 1 of the present invention.

[0029] Figure 2 is a schematic diagram of the single-piece sealing gasket of Embodiment 2 of the present invention.

[0030] Figure 3 is a schematic diagram of the single-piece sealing gasket of Embodiment 3 of the present invention.

[0031] Figure 4 is a side view of the single-piece sealing gasket of the present invention.

[0032] Figure 5 is a second side view of the single-piece sealing gasket of the present invention.

[0033] Figure 6 is a cross-sectional schematic diagram of the first embodiment of the wireless information integration chip of the present invention.

[0034] Figure 7 is a planar schematic diagram of the information and heating layer of the first embodiment of the wireless information integration chip of the present invention.

[0035] Figure 8 is a plan view of the information area of ​​the first embodiment of the wireless information integration chip of the present invention.

[0036] Figure 9 is a cross-sectional schematic diagram of a second embodiment of the wireless information integration chip of the present invention.

[0037] Figure 10 is a plan view of the information and heating layer of the third embodiment of the wireless information integration chip of the present invention.

[0038] Figure 11 is a plan view of the information area of ​​the third embodiment of the wireless information integration chip of the present invention.

[0039] Label Explanation:

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

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

[0042] The components include: an adhesive composite layer 300, an electromagnetic induction heating layer 310, an adhesive layer 320, an adhesive film 321, an adhesive 322, a bonding film 330, a composite film 340, a second bonding film 350, and a 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, spacer ITV. Embodiments of the present invention

[0045] To further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0046] Example 1:

[0047] As shown in Figure 1, in Embodiment 1 of the present invention, the single-piece sealing gasket of the present invention includes an upper layer 100, a connecting layer 200 and an adhesive composite layer 300 sequentially laminated from top to bottom.

[0048] In Embodiment 1 of the present invention, the upper layer 100 is disposed on the top 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. As shown in FIG1, the upper layer 100 includes a surface film 110, which serves as the top 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 may include at least one of PP film, 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 high tensile strength, a smooth surface and good gloss; in addition, when the bottom of the single-piece sealing gasket of the present invention is subjected to heat conduction, the surface film 110 can be prevented from sticking to other external components (such as bottle caps).

[0049] In a first embodiment of the present invention, a connecting layer 200 is disposed between the upper layer 100 and the adhesive composite layer 300. As shown in FIG1, the connecting layer 200 includes an adhesive 210 and a release coating 220. The release coating 220 is applied to the non-adhesive area on the lower surface of the upper layer 100, and the connecting layer 200 uses the adhesive 210 to bond the strongly adhesive area on the surface of the upper layer 100 to the adhesive composite layer 300. The release coating 220 ensures that the non-adhesive area of ​​the upper layer 100 and the adhesive composite layer 300 are in a state where they are bonded together but can be easily separated. The release coating 220 also ensures that the non-adhesive area of ​​the upper layer 100 and the adhesive composite layer 300 do not stick together. This allows the user to easily peel off the part of the single-piece sealing gasket above the non-adhesive area of ​​the upper layer 100 by hand without the aid of external objects. The user can easily peel off the single-piece sealing gasket of the present invention by applying force to the part of the single-piece sealing gasket above the non-adhesive area of ​​the upper layer 100. In some embodiments, the single-piece sealing gasket of the present invention can achieve a peel strength greater than or equal to 17.8 N / 15 mm between the strong adhesive area of ​​the lower surface of the upper layer 100 and the adhesive-sealing composite layer 300 through the adhesive 210, thereby firmly bonding the upper layer 100 and the adhesive-sealing composite layer 300. The adhesive 210 can be a bonding adhesive that can achieve a peel strength greater than or equal to 17.8 N / 15 mm between the lower surface of the upper layer 100 and the adhesive-sealing composite layer 300. The adhesive 210 can be a dry bonding adhesive. The adhesive 210 can also be a hot melt bonding adhesive, and the material of the hot melt bonding adhesive can be one of PE, PP, EMAC, EMAA, EAA, EEA and EMMA. The thickness of the hot melt bonding adhesive is preferably 4 to 60 µm.

[0050] It should be further explained that as the thickness of the upper layer 100 and the adhesive composite layer 300 becomes thinner, after electromagnetic induction sealing, the pull flap of a conventional sealing gasket often adheres to the film below it, making it difficult for the user to open the pull flap. The release coating 220 of the present invention can be made of, for example, varnish or silicone oil, and the thickness of the release coating 220 is preferably 0.5 to 20 µm. Because the lower surface of the upper layer 100 is coated with varnish or silicone oil (i.e., release coating 220), the user can easily pry open the single-piece sealing gasket of the present invention by pinching the portion above the non-adhesive area of ​​the upper layer 100 with their fingers. This ensures that the user can easily peel off the single-piece sealing gasket of the present invention by directly pinching the portion above the non-adhesive area of ​​the upper layer 100 without the aid of external objects. Furthermore, the release coating 220 can be applied in a manner such as full-area coating or dot coating. Taking dot coating as an example, after electromagnetic induction sealing, the small amount of air between the dots of the dot matrix of the monolithic sealing gasket of the present invention will be heated and expanded by electromagnetic induction sealing. This will cause the portion of the monolithic sealing gasket above the non-adhesive area of ​​the upper layer 100 to be pushed upward, thereby ensuring that the portion of the monolithic sealing gasket above the non-adhesive area of ​​the upper layer 100 is separated from the adhesive composite layer 300. This allows the user to more easily pry open the portion of the monolithic sealing gasket above the non-adhesive area of ​​the upper layer 100 with their fingers, thus ensuring that the user can easily peel off the monolithic sealing gasket of the present invention by directly pinching the portion of the monolithic sealing gasket above the non-adhesive area of ​​the upper layer 100 without the aid of external objects.

[0051] In Embodiment 1 of the present invention, the adhesive-sealing composite layer 300 is disposed at the bottom layer of the monolithic sealing gasket of the present invention. Referring to Figure 1, the adhesive-sealing composite layer 300 includes an electromagnetic induction heating layer 310 and an adhesive layer 320 sequentially laminated from top to bottom. The electromagnetic induction heating layer 310 can be aluminum foil or a wireless information integrated sheet. Aluminum foil is a common structure in conventional sealing gaskets, and its thickness is preferably 10 to 40 µm, thereby enhancing the barrier function against moisture and oxygen, producing the effect of preventing leakage of contents and sealing and preserving the contents. This invention can also use the following wireless information integration sheet to replace aluminum foil. The wireless information integration sheet can effectively reduce the amount of aluminum foil used and reduce energy consumption. In addition, by using the wireless information integration sheet, this invention can increase the function of wireless information transmission, reduce aluminum foil material waste, reduce energy consumption, avoid manpower waste, avoid interference from metals and liquids, improve production efficiency, provide good communication performance and significantly increase communication distance, and greatly enhance the automation, digitalization and intelligent development of factories, warehouses, logistics, stores and unmanned checkout management. The thickness of the wireless information integration sheet is preferably 27µm to 2.5mm.

[0052] The sealing layer 320 is mainly used to seal the container opening. In Embodiment 1 of the present invention, the sealing layer 320 can be a hot melt adhesive. The hot melt adhesive material can be one of EVA, PIB, EBA, EAA, EMAC, polyacrylate, acrylic copolymer, and EMAA, chosen for its ease of removal from the bottle opening or its ability to be easily and cleanly removed from the bottle opening. The thickness of the hot melt adhesive is preferably 4 to 100 µm. The hot melt adhesive can achieve a continuous sealing effect even when the contents of the packaging container contain water, and it can also achieve a continuous sealing effect when the contents of the packaging container contain chili peppers, garlic, fermented bean curd, honey, or pungent additives.

[0053] Example 2:

[0054] As shown in Figure 2, the difference between Embodiment 2 and Embodiment 1 lies in the difference in the adhesive composite layer 300.

[0055] Specifically, in Embodiment 2 of the present invention, the adhesive composite layer 300 includes an electromagnetic induction heating layer 310 and an adhesive layer 320 sequentially laminated from top to bottom; wherein, the adhesive layer 320 of the adhesive composite layer 300 includes an adhesive film 321 and an adhesive 322, and the adhesive 322 is disposed between the adhesive film 321 and the electromagnetic induction heating layer 310; the material of the adhesive film 321 can be selected from at least one of the group consisting of PE, PP, PA, PVDC, EVOH and PET, chosen for its ease of opening from the bottle mouth after electromagnetic induction sealing or its ease of clean opening from the bottle mouth, and the thickness of the adhesive film 321 is preferably 12 to 100 µm; while the adhesive 322 can be, for example, a composite adhesive, but is not limited thereto.

[0056] In a second embodiment of the present invention, the adhesive composite layer 300 further includes a connecting film 330 and a composite film 340. The connecting film 330 is disposed above the electromagnetic induction heating layer 310. In other words, the connecting film 330 can be directly laminated above the electromagnetic induction heating layer 310, or it can be indirectly laminated above the electromagnetic induction heating layer 310 (i.e., other structures are disposed between the connecting film 330 and the electromagnetic induction heating layer 310). As shown in FIG2, the connecting film 330 is disposed on the uppermost layer of the adhesive composite layer 300, and it is used to laminate with the surface film 110 of the upper layer 100, that is, the connecting film 330 is laminated with the surface film 110 of the upper layer 100 through the adhesive 210. The bonding film 330 may include at least one of PE film, PP film, PA film, EPP film, and EPE film. The thickness of the bonding film 330 is preferably 12 to 200 µm, thereby improving the peel strength after lamination between the bonding film 330 and the upper layer 100. The composite film 340 is also disposed above the electromagnetic induction heating layer 310. Specifically, the composite film 340 is disposed between the bonding film 330 and the electromagnetic induction heating layer 310. The composite film 340 is used to improve the tensile strength of the monolithic sealing gasket of the present invention. The composite film 340 may include at least one of PET film, PA film, and PP film. The thickness of the composite film 340 is preferably 12 to 100 µm.

[0057] In a second embodiment of the present invention, adhesive a can be used to bond the connecting film 330 and the composite film 340, as well as the electromagnetic induction heating layer 310 and the composite film 340. In some embodiments, adhesive a can be a composite adhesive that enables the peel strength between the two bonded layers (e.g., the connecting film 330 and the electromagnetic induction heating layer 310 or the electromagnetic induction heating layer 310 and the composite film 340) to be greater than or equal to 4 N / 15 mm, but is not limited thereto.

[0058] In Embodiment 2 of the present invention, the method for manufacturing the single-piece sealing gasket of the present invention can be as follows:

[0059] First, an adhesive is applied to the lower surface of the composite film roll, and the lower surface of the composite film roll is dry-laminated with the upper surface of the electromagnetic induction heating layer roll. The roll is then placed in a curing chamber for more than 24 hours to produce the first composite section roll.

[0060] Secondly, varnish or silicone oil is applied to the non-adhesive area on the lower surface of the surface film roll in a full-area or dot-area coating manner to create a functional layer roll.

[0061] Then, an adhesive is applied to the composite film surface of the first composite roll, so that the composite film surface of the first composite roll is dry-laminated with the lower surface of the connecting film roll, and then placed in a curing chamber for more than 24 hours to produce the second composite roll.

[0062] Next, an adhesive is applied to the electromagnetic induction heating layer of the second composite roll, and the electromagnetic induction heating layer of the second composite roll is dry-laminated with the sealing film roll. The roll is then placed in a curing chamber for at least 24 hours to produce the lower composite roll. Alternatively, hot melt adhesive is applied to the composite film surface of the second composite roll to produce the lower composite roll.

[0063] Next, an adhesive is applied to the connecting film surface of the lower composite section roll material to dry-laminate the connecting film surface of the lower composite section roll material with the lower surface of the functional layer roll material. The roll material is then placed in a curing chamber for more than 24 hours to produce a single-piece sealing gasket roll material.

[0064] Finally, cut the single-piece sealing gasket to the appropriate size according to the user's needs.

[0065] Example 3:

[0066] As shown in Figure 3, the difference between Embodiment 3 and Embodiment 1 lies in the difference between the upper layer 100 and the adhesive composite layer 300.

[0067] Specifically, in Embodiment 3 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 disposed below the surface film 110. In other words, the first connecting film 120 can be directly laminated below the surface film 110, or the first connecting film 120 can be indirectly laminated below the surface film 110 (i.e., other structures are disposed 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 laminated sequentially from top to bottom.

[0068] In Embodiment 3 of the present invention, as shown in FIG. 3, a first connecting film 120 is disposed on the bottom layer of the upper layer 100. The first connecting film 120 is used to bond with the adhesive-sealing composite layer 300. Specifically, the first connecting film 120 is bonded to the adhesive-sealing composite layer 300 by an adhesive 210. The first connecting film 120 may include at least one of PE film, PP film, PA film, EMMA film, and EMAC film. The thickness of the first connecting film 120 is preferably 12 to 100 µm. This improves the peel strength after the first connecting film 120 and the adhesive-sealing composite layer 300 are bonded together.

[0069] In the third embodiment of the present invention, as shown in FIG3, 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 laminated above the electromagnetic induction heating layer 310, or the second connecting film 350 can be indirectly laminated above the electromagnetic induction heating layer 310 (i.e., other structures are disposed between the second connecting film 350 and the electromagnetic induction heating layer 310). As shown in Figure 3, the second connecting film 350 is disposed on the top layer of the adhesive composite layer 300 and is used to composite with the upper layer 100. Specifically, the second connecting film 350 is composited with the first connecting film 120 of the upper layer 100 by an 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 200 µm. In this way, 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.

[0070] In Embodiment 3 of the present invention, as shown in FIG. 3, a thickening layer 360 is disposed above the electromagnetic induction heating layer 310. 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.

[0071] In Embodiment 3 of the present invention, adhesive a can be used to bond the second connecting film 350 and the thickening layer 360, as well as the thickening layer 360 and the electromagnetic induction heating layer 310. Adhesive a can be a composite adhesive capable of achieving a peel strength greater than or equal to 4 N / 15 mm between the two bonded layers (e.g., the second connecting film 350 and the thickening layer 360, or the thickening layer 360 and the electromagnetic induction heating layer 310), but is not limited thereto. Furthermore, adhesive a can be used to bond the surface film 110 and the first connecting film 120. Adhesive a can be a composite adhesive capable of achieving a peel strength greater than or equal to 4 N / 15 mm between the two bonded layers (e.g., the surface film 110 and the first connecting film 120), but is not limited thereto.

[0072] In Embodiment 3 of the present invention, the method for manufacturing the single-piece sealing gasket of the present invention can be as follows:

[0073] First, an adhesive is applied to the lower surface of the surface film roll, so that the composite surface of the surface film roll is dry-laminated with the upper surface of the first connecting film roll. The roll is then placed in a curing chamber for more than 24 hours to produce the upper composite roll.

[0074] Secondly, varnish or silicone oil is applied to the non-adhesive area of ​​the first bonding film surface of the upper composite roll material in a full-area coating or dot-coating manner to create a functional layer roll material.

[0075] Then, an adhesive is applied to the upper surface of the electromagnetic induction heating layer roll material, and the electromagnetic induction heating layer roll material is dry-laminated with the lower surface of the thickened layer roll material. The roll material is then placed in a curing chamber for more than 24 hours to produce the first composite roll material.

[0076] Next, an adhesive is applied to the thickened layer of the first composite roll, so that the thickened layer of the first composite roll is dry-laminated with the lower surface of the second connecting film roll, and then placed in a curing chamber for more than 24 hours to produce the second composite roll.

[0077] Next, an adhesive is applied to the electromagnetic induction heating layer of the second composite roll, allowing the electromagnetic induction heating layer of the second composite roll to be dry-laminated with the laminating film roll surface. This is then cured in a curing chamber for at least 24 hours to produce the lower composite roll. Alternatively, hot melt adhesive is applied to the electromagnetic induction heating layer of the second composite roll to produce the lower composite roll.

[0078] Next, an adhesive is applied to the second connecting film surface of the lower composite section roll material, so that the second connecting film surface of the lower composite section roll material is dry-laminated with the first connecting film surface of the functional layer roll material, and then placed in the curing chamber for more than 24 hours to produce a single-piece sealing gasket roll material.

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

[0080] To facilitate understanding of the wireless information integration chip of the present invention, the following describes the implementation of the wireless information integration chip.

[0081] A first embodiment of the wireless information integration sheet: As shown in Figures 6 to 8, in the first embodiment of the wireless information integration sheet, the wireless information integration 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 to bond the base film 1w and the information and heating layer 3w.

[0082] In a first embodiment of the wireless information integration sheet, the base film 1w is used as the initial layer for fabricating the wireless information integration sheet. In one specific example, the base film 1w may include at least one of PI film, PEN film, PET film, PC film, PP film, and PE film. The thickness of the base film 1w is preferably 20 to 150 µm, within which the longitudinal tensile strength of the base film 1w is relatively high. The lower surface of the base film 1w is bonded to the first adhesive layer 2w, while the upper surface of the base film 1w can serve as a printing surface for printing 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, so as to facilitate 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 be heated by electromagnetic induction through the electromagnetic field generated by the electromagnetic induction sealing machine, causing the sealing layer 320 of the present invention to melt and adhere to the container opening, thereby acting as an electromagnetic induction sealing gasket to seal the container opening. In the wireless information integrated chip of the present invention, 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 a first embodiment of the wireless information integration chip, as shown in FIG7, an 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 (e.g., 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 integrated chip, as shown in Figure 8, the information area 31w includes a chip 311w and an antenna 312w. The chip 311w and antenna 312w can realize wireless information transmission based on the RFID frequency band desired by the user. Regarding the chip 311w, it may have a unique identification code and can be selected according to the purpose. For example, the chip 311w may 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 transmit signals, and its material may 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] A second embodiment of the wireless information integration sheet: As shown in Figure 9, the second embodiment of the wireless information integration sheet differs from the first embodiment in that, in addition to the aforementioned base film 1w, first adhesive layer 2w, and information and heating layer 3w, 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 furthest 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 serves to bond the information and heating layer 3w and the protective layer 5w.

[0089] In a second embodiment of the wireless information integration sheet, the second adhesive layer 4w only needs to be able to bond the information layer to the heating layer 3w and the protective layer 5w, and its material can be, for example, a dry composite adhesive, without particular limitation. 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 gap between the electromagnetic induction heating ring 32w and the information area 31w to improve the overall structural strength of the wireless information integration sheet.

[0090] In a second embodiment of the wireless information integrated chip, the protective layer 5w is used to protect the information area 31w (i.e., chip 311w, antenna 312w, and a separately added battery) from external damage that would affect 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, and the thickness of the protective layer 5w may be 12 to 100 µm. Furthermore, either the upper or lower surface of the protective layer 5w can be used as a printing surface.

[0091] A third implementation of the wireless information integration chip: As shown in Figures 10 and 11, the difference between the third and first implementations of the wireless information integration chip is that in the third implementation, 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 integrated. 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. In this case, although the electromagnetic induction heating ring 32w and the information area 31w are electrically connected through the physical connection bridge 33w, the wireless communication distance is not significantly reduced.

[0092] Furthermore, it should be noted that the cross-sectional width W2 of the non-adhesive 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-adhesive 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. This allows 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-adhesive area on the lower surface of the upper layer 100 can be smaller; conversely, 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-adhesive area on the lower surface of the upper layer 100 can be larger. Figure 4 of the present invention is used to illustrate an embodiment in which 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 of the present invention is used to illustrate an embodiment 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.

Claims

1. A single piece gasket, characterized by: 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 closure gasket of claim 1, wherein: 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 gasket of claim 1, wherein: The release coating is made of varnish or silicone oil.

4. The single-piece closure gasket of claim 1, wherein: The release coating is applied either in a full-area coating or a dot-area coating.

5. The single-piece closure gasket of claim 1, wherein: 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 closure gasket of claim 1, wherein: 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 closure gasket of claim 1, wherein: The surface film includes at least one of PP film, PET film, PE film, PA film and EMAC film.

8. The single-piece closure gasket of claim 1, wherein: 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 closure gasket of claim 1, wherein: 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 claim 1, 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 claim 1, characterized in that: The electromagnetic induction heating layer is made of aluminum foil.

12. The single-piece sealing gasket as described in claim 1, 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.

Images