Enhanced butterfly pull-tab foamed closure patch and closure bottle

Abstract

The utility model discloses a reinforced butterfly pull ear foamed sealing piece, including lower part layer and butterfly pull ear, butterfly pull ear includes top double film layer, first double film layer, second double film layer and bottom double film layer, first double film layer is folded to form first double film folding layer, second double film layer is folded to form second double film folding layer, first double film folding layer, second double film folding layer all are between top double film layer and bottom double film layer, and the closed end of first double film folding layer and the closed end of second double film folding layer correspond contact, and the opening of first double film folding layer, the opening of second double film folding layer all set up to outward, top double film layer, first double film layer, second double film layer, bottom double film layer all include first film layer and the second film layer of first film layer's adhesion, and the melting point of first film layer is greater than the melting point of second film layer, the utility model discloses utilize the melting point temperature difference of first film layer and second film layer to make the heat seal of the second film layer of two layers of upper and lower adjacent.

Description

Technical Field

[0001] This utility model relates to the field of foam sealing technology, and in particular to an enhanced butterfly pull foam sealing sheet and a sealing bottle. Background Technology

[0002] Current packaging containers include plastic, paper, aluminum, and glass containers. These containers have an opening at the top, with a sealing edge around the opening. A sealing gasket is heat-sealed along this edge to ensure a tight seal. To open the sealing gasket, one needs to use a fingernail or a tool to pry it open from the aluminum foil seal, which is neither hygienic nor convenient. Furthermore, after tearing the sealing gasket from the container's edge, it's difficult to create a clean, uncluttered opening. Powder or liquid inside the container can easily scatter and spill when poured out, and residue can remain at the opening, creating a breeding ground for bacteria. Utility Model Content

[0003] The problem to be solved by this utility model is to provide an enhanced butterfly pull foam sealing sheet and sealing bottle, which makes it easy to open and lift the butterfly pull to create a neat opening.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: An enhanced butterfly-shaped flap foam sealing sheet, characterized in that: it comprises a lower layer and the butterfly flap, the butterfly flap comprising a top double film layer, a first double film layer, a second double film layer, and a bottom double film layer; the first double film layer is folded in half to form a first double film folded layer, and the second double film layer is folded in half to form a second double film folded layer; both the first and second double film folded layers are located between the top and bottom double film layers, and the fold lines of the first and second double film folded layers correspond to and contact each other; the openings of both the first and second double film folded layers face outwards; the top, first, second, and bottom double film layers each include a first film layer and a second film layer adhered to the first film layer, the first film layer... The melting point is greater than that of the second film layer; in the top double film layer, the first film layer is above the second film layer; in both the first and second double film layers, the second film layer covers the outer surface of the first film layer, and the upper and lower surfaces of the folded first film layer are not in contact; in the bottom double film layer, the first film layer is below the second film layer; the upper surfaces of the second film layer of the first double film folded layer and the second double film folded layer are both heat-sealed with the lower surface of the second film layer of the top double film layer, and the lower surfaces of the second film layer of the first double film folded layer and the second double film folded layer are both heat-sealed with the upper surface of the second film layer of the bottom double film layer, and the lower surface of the first film layer of the bottom double film layer is attached to the upper surface of the lower layer.

[0005] The openings of the first and second double-layer folded membranes face outwards and their upper and lower surfaces do not adhere to each other. When the upper part of the first and second double-layer folded membranes is lifted and closed, it forms a butterfly-shaped pull tab. Users can easily lift the membrane by pinching both ends of the butterfly pull tab without using fingernails or tools, thus avoiding bacterial contamination.

[0006] The aforementioned butterfly pull tab is made of a multi-layer structure consisting of a top double-layer film, a double-folded PET layer, and a bottom double-layer film, all heat-sealed together. Because the melting point of the first film layer is higher than that of the second film layer, the temperature difference between their melting points is used to heat-seal adjacent second film layers. During this heat-sealing process, the melting point of the first film layer has not yet been reached, resulting in the openings of the first and second double-folded film layers remaining separated due to the unmelted first film layer. Consequently, the upper and lower surfaces of the openings of both the first and second double-folded film layers are not in contact. This multi-layered butterfly pull tab exhibits excellent stiffness, high tensile strength, and is less prone to breakage at the base during tearing, allowing for smooth operation even for the elderly, children, or when hands are wet.

[0007] The lower surface of the aforementioned lower layer adheres to the mouth of the sealed bottle. When tearing this reinforced butterfly pull foam sealing sheet, the user pinches the upper half of the butterfly pull with two fingers and pulls the entire sealing sheet upwards. The lower layer of the sealing sheet tears along the mouth of the sealed bottle, creating a clean and smooth opening at the bottle's mouth.

[0008] In a preferred embodiment, the minimum melting point of the first film layer and the maximum melting point of the second film layer differ by at least 20°C. This setting helps prevent heat-sealing failure due to an excessively small difference in melting points.

[0009] In a further preferred embodiment, the first film layer is a PET film, and the second film layer is a PE film or a PP film.

[0010] The melting point range of the aforementioned PET (polyethylene terephthalate) is 255℃-267℃. The PET mentioned generally refers to pure PET (resin grade).

[0011] The aforementioned types of PE (polyethylene) include low-density PE (LDPE), linear low-density PE (LLDPE), and high-density PE (HDPE). The melting point range of low-density PE (LDPE) is 105℃-115℃; that of linear low-density PE (LLDPE) is 120℃-128℃; and that of high-density PE (HDPE) is 125℃-135℃.

[0012] The aforementioned types of PP (polypropylene) include homopolymer PP (PP-H), block copolymer PP (PP-B), and random copolymer PP (PP-R). The melting point range of homopolymer PP (PP-H) is 160℃-170℃; that of block copolymer PP (PP-B) is 150℃-165℃; and that of random copolymer PP (PP-R) is 130℃-145℃.

[0013] In a preferred embodiment, the first film layer and the second film layer are bonded together by an adhesive layer. The adhesive layer can be a hot melt adhesive or similar material.

[0014] In a preferred embodiment, the lower layer comprises a functional film layer, an aluminum foil layer, and a foam layer sequentially bonded from bottom to top, with the lower surface of the first film layer of the bottom double film layer bonded to the upper surface of the foam layer. The lower surface of the aluminum foil layer is bonded to the upper surface of the functional film layer, the lower surface of the foam layer is bonded to the upper surface of the aluminum foil layer, and the lower surface of the first film layer of the bottom double film layer is bonded to the upper surface of the foam layer.

[0015] In a further preferred embodiment, the lower surface of the aluminum foil layer and the upper surface of the functional film layer, the lower surface of the foam layer and the upper surface of the aluminum foil layer, and the lower surface of the first film layer of the bottom double film layer and the upper surface of the foam layer are all bonded together by an adhesive layer. The adhesive layer can be a hot melt adhesive, etc.

[0016] In a further preferred embodiment, the lower layer is provided with an annular easy-tear line, which runs from top to bottom through the foam layer, aluminum foil layer, and functional film layer. The butterfly pull is located inside the annular easy-tear line. This annular easy-tear line defines a fixed opening area for the sealing sheet, preventing irregular tearing during opening and ensuring a neat opening boundary. Furthermore, the lower layer outside the annular easy-tear line remains bonded to the bottle opening, preventing the entire sealing sheet from detaching upon opening and preventing external moisture and impurities from entering the bottle (the unopened area remains sealed).

[0017] In a further preferred embodiment, the outer edge of the bottom double-layer membrane of the butterfly pull is adjacent to the annular easy-tear line. This arrangement shortens the distance between the butterfly pull and the annular easy-tear line, allowing the tensile force to be directly transmitted to the annular easy-tear line, ensuring that the annular easy-tear line breaks completely in one go.

[0018] In a further preferred embodiment, the functional film layer is a heat-sealable film or an easy-tear film. The heat-sealable film can be made of PE, PP, or EVA. The easy-tear film can be made of PE, PP, or PET. When using the film, a suitable functional film layer can be selected based on the container material.

[0019] This utility model also provides a sealed bottle with the above-mentioned reinforced butterfly pull foam sealing sheet, characterized in that: the reinforced butterfly pull foam sealing sheet is attached to the bottle mouth of the sealed bottle.

[0020] Compared with the prior art, this utility model has the following advantages: This invention uses a butterfly pull tab to open a neatly shaped opening, eliminating the need for other tools and making it both hygienic and convenient. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a specific embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the structure of the sealing bottle according to a specific embodiment of this utility model; Figure 3 This is a structural schematic diagram of a specific embodiment 2 of the present invention. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0023] Example 1, as Figure 1As shown, the enhanced butterfly pull foam sealing sheet in this embodiment includes a lower layer 1 and a butterfly pull 2. The butterfly pull 2 ​​includes a top double film layer 21, a first double film layer 22, a second double film layer 23, and a bottom double film layer 24. The first double film layer 22 is folded in half to form a first double film folded layer 25, and the second double film layer 23 is folded in half to form a second double film folded layer 26. The first double film folded layer 25 and the second double film folded layer 26 are both located between the top double film layer 21 and the bottom double film layer 24, and the fold line of the first double film folded layer 25 and the fold line of the second double film folded layer 26 correspond to each other. The openings of the first double film folded layer 25 and the second double film folded layer 26 are both outward. The top double film layer 21, the first double film layer 22, the second double film layer 23, and the bottom double film layer 24 each include a first film layer 201 and a second film layer 202 that is adhered to the first film layer 201. The melting point of the first film layer 201 is greater than that of the second film layer 202. The melting point of film layer 202; in the top double film layer 21, the first film layer 201 is above the second film layer 202; in the first double film layer 22 and the second double film layer 23, the second film layer 202 covers the outer surface of the first film layer 201, and the upper and lower surfaces of the folded first film layer 201 are not in contact; in the bottom double film layer 24, the first film layer 201 is below the second film layer 202; the upper surface of the second film layer 202 of the first double film folded layer 25 and the upper surface of the second film layer 202 of the second double film folded layer 26 are heat-sealed with the lower surface of the second film layer 202 of the top double film layer 21, and the lower surface of the second film layer 202 of the first double film folded layer 25 and the lower surface of the second film layer 202 of the second double film folded layer 26 are heat-sealed with the upper surface of the second film layer 202 of the bottom double film layer 24, and the lower surface of the first film layer 201 of the bottom double film layer 24 is attached to the upper surface of the lower layer 1.

[0024] The openings of the first double-layer folded layer 25 and the second double-layer folded layer 26 are both outward and their upper and lower surfaces are not attached. When the upper part of the first double-layer folded layer 25 and the second double-layer folded layer 26 is lifted up and closed, a butterfly-shaped pull tab is formed. Users can easily lift the butterfly pull tab 2 by pinching both ends without fingernails or tools, thus avoiding bacterial contamination.

[0025] The aforementioned butterfly pull tab 2 is formed by heat-sealing a multi-layer structure consisting of a top double film layer 21, a double-folded PET layer, and a bottom double film layer 24. Since the melting point of the first film layer 201 is higher than that of the second film layer 202, the temperature difference between the melting points of the first and second film layers 201 is used to heat-seal adjacent layers of the second film layer 202. During this heat-sealing process, the melting point of the first film layer 201 has not yet been reached, resulting in the openings of the first double-folded film layer 25 and the second double-folded film layer 26. Because the first film layer 201 has not melted, the upper and lower surfaces of the folded first film layer 201 remain separated, thus preventing the upper and lower surfaces of the openings of the first double-folded film layer 25 and the second double-folded film layer 26 from adhering. This multi-layered butterfly pull tab 2 exhibits excellent stiffness and high tensile strength, making it less prone to breakage at the base during tearing, and allowing for smooth operation even for the elderly, children, or when hands are wet.

[0026] The lower surface of the aforementioned lower layer 1 adheres to the mouth of the sealed bottle 3. When tearing this reinforced butterfly pull 2 ​​foam sealing sheet, the user pinches the upper half of the butterfly pull 2 ​​with two fingers and pulls the entire sealing sheet upwards. The lower layer 1 of the sealing sheet tears along the mouth of the sealed bottle 3, creating a neat and smooth opening at the mouth of the sealed bottle 3.

[0027] The minimum melting point of the first film layer 201 and the maximum melting point of the second film layer 202 differ by at least 20°C. This setting helps prevent heat-sealing failure caused by an excessively small difference in melting points.

[0028] The first film layer 201 is a PET film, and the second film layer 202 is a PE film.

[0029] The melting point range of the aforementioned PET (polyethylene terephthalate) is 255℃-267℃. The PET mentioned generally refers to pure PET (resin grade).

[0030] The aforementioned types of PE (polyethylene) include low-density PE (LDPE), linear low-density PE (LLDPE), and high-density PE (HDPE). The melting point range of low-density PE (LDPE) is 105℃-115℃; that of linear low-density PE (LLDPE) is 120℃-128℃; and that of high-density PE (HDPE) is 125℃-135℃.

[0031] The first film layer 201 and the second film layer 202 are bonded together by an adhesive layer 4. The adhesive layer 4 can be a hot melt adhesive or the like.

[0032] The lower layer 1 includes a functional film layer 11, an aluminum foil layer 12, and a foam layer 13, which are sequentially bonded from bottom to top. The lower surface of the first film layer 201 of the bottom double film layer 24 is bonded to the upper surface of the foam layer 13. The lower surface of the aluminum foil layer 12 is bonded to the upper surface of the functional film layer 11, the lower surface of the foam layer 13 is bonded to the upper surface of the aluminum foil layer 12, and the lower surface of the first film layer 201 of the bottom double film layer 24 is bonded to the upper surface of the foam layer 13.

[0033] The lower surface of the aluminum foil layer 12 is bonded to the upper surface of the functional film layer 11, the lower surface of the foam layer 13 is bonded to the upper surface of the aluminum foil layer 12, and the lower surface of the first film layer 201 of the bottom double film layer 24 is bonded to the upper surface of the foam layer 13 by an adhesive layer 4. The adhesive layer 4 can be a hot melt adhesive or the like.

[0034] The functional film layer 11 is either a heat-sealable film or an easy-tear film. The heat-sealable film can be made of PE, PP, or EVA. The easy-tear film can be made of PE, PP, or PET. When using the film, the appropriate functional film layer 11 can be selected based on the material of the container.

[0035] like Figure 2 As shown, this utility model also provides a sealed bottle 3 with the above-mentioned reinforced butterfly pull foam sealing sheet, wherein the reinforced butterfly pull foam sealing sheet is attached to the bottle mouth of the sealed bottle 3.

[0036] Example 2, as Figure 3 As shown, the difference between the enhanced butterfly pull foam sealing sheet and sealing bottle in this embodiment and that in Embodiment 1 is: The lower layer 1 has an annular easy-tear line 14, which runs from top to bottom through the foam layer 13, the aluminum foil layer 12, and the functional film layer 11. The butterfly pull tab 2 is located inside the annular easy-tear line 14. The annular easy-tear line 14 defines a fixed opening area for the sealing sheet, preventing irregular tearing during opening and ensuring a neat opening boundary. Furthermore, the lower layer 1 outside the annular easy-tear line 14 remains bonded to the mouth of the sealed bottle 3, preventing the entire sealing sheet from detaching when opened and preventing external moisture and impurities from entering the sealed bottle 3 (the unopened area remains sealed).

[0037] The outer edge of the bottom double film layer 24 of the butterfly pull tab 2 is close to the annular easy-tear line 14. This arrangement shortens the distance between the butterfly pull tab 2 and the annular easy-tear line 14, allowing the pulling force to be directly transmitted to the annular easy-tear line 14, ensuring that the annular easy-tear line 14 breaks completely in one go.

[0038] Furthermore, it should be noted that the names of the various parts of the specific embodiments described in this specification may differ. All equivalent or simple variations made to the structure, features, and principles described in this utility model patent concept are included within the protection scope of this utility model patent. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined in these claims, they should all fall within the protection scope of this utility model.

Claims

1. An enhanced butterfly pull-ear foam sealing sheet, characterized in that: The system includes a lower layer and a butterfly flap. The butterfly flap comprises a top double-layer film, a first double-layer film, a second double-layer film, and a bottom double-layer film. The first double-layer film is folded in half to form a first double-layer folded layer, and the second double-layer film is folded in half to form a second double-layer folded layer. Both the first and second double-layer folded layers are located between the top and bottom double-layer film, and the fold lines of the first and second double-layer folded layers correspond to and contact each other. The openings of both the first and second double-layer folded layers face outwards. Each of the top, first, second, and bottom double-layer film includes a first film and a second film that adheres to the first film. The melting point of the first film is greater than that of the second film. In the top double film layer, the first film layer is above the second film layer; in both the first and second double film layers, the second film layer covers the outer surface of the first film layer, and the upper and lower surfaces of the folded first film layer are not in contact; in the bottom double film layer, the first film layer is below the second film layer; the upper surfaces of the second film layer of the first double film layer and the second double film layer are heat-sealed with the lower surface of the second film layer of the top double film layer, and the lower surfaces of the second film layer of the first double film layer and the second double film layer are heat-sealed with the upper surface of the second film layer of the bottom double film layer, and the lower surface of the first film layer of the bottom double film layer is attached to the upper surface of the lower layer.

2. The enhanced butterfly pull-ear foam sealing sheet as described in claim 1, characterized in that: The minimum melting point of the first film layer differs from the maximum melting point of the second film layer by at least 20°C.

3. The enhanced butterfly pull-ear foam sealing sheet as described in claim 1 or 2, characterized in that: The first film layer is a PET film, and the second film layer is a PE film or a PP film.

4. The enhanced butterfly pull-ear foam sealing sheet as described in claim 1, characterized in that: The first film layer and the second film layer are bonded together by an adhesive layer.

5. The enhanced butterfly pull-ear foam sealing sheet as described in claim 1, characterized in that: The lower layer includes a functional film layer, an aluminum foil layer, and a foam layer that are sequentially bonded together from bottom to top, with the lower surface of the first film layer of the bottom double film layer bonded to the upper surface of the foam layer.

6. The enhanced butterfly pull-ear foam sealing sheet as described in claim 5, characterized in that: The lower surface of the aluminum foil layer and the upper surface of the functional film layer, the lower surface of the foam layer and the upper surface of the aluminum foil layer, and the lower surface of the first film layer of the bottom double film layer and the upper surface of the foam layer are all bonded together by an adhesive layer.

7. The enhanced butterfly pull-ear foam sealing sheet as described in claim 5, characterized in that: The lower layer is provided with an annular easy-tear line, which runs through the foam layer, aluminum foil layer and functional film layer from top to bottom, and the butterfly pull is located inside the annular easy-tear line.

8. The enhanced butterfly pull-ear foam sealing sheet as described in claim 7, characterized in that: The outer edge of the bottom double-layer membrane of the butterfly pull is adjacent to the annular easy-tear line.

9. The enhanced butterfly pull-ear foam sealing sheet as described in claim 5, characterized in that: The functional film layer is a heat-sealable film or an easy-tear film.

10. A sealing bottle, comprising the reinforced butterfly pull foam sealing sheet as described in any one of claims 1-9, characterized in that: The reinforced butterfly pull foam sealing sheet is attached to the mouth of the sealed bottle.

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