Unbreakable tearable extraction opening structure and package body

Abstract

Disclosed in the present invention are an unbreakable tearable extraction opening structure and a package body. The unbreakable tearable extraction opening structure comprises a top piece and an additional layer, wherein a strip uncovering portion of the top piece and a separation portion of the additional layer are oppositely arranged, and after the strip uncovering portion and the separation portion are torn, a penetrating extraction opening is created. In the tearable extraction opening structure, the strength and the thickness of the extraction opening are increased by adding the additional layer, thereby reducing the breakage of the extraction opening during a tearing process, and reducing the problem that the extraction opening is broken during a process of repeatedly extracting products. The top piece and the additional layer can be made of paper substrates, thereby realizing the application of the paper substrates to the flexible packaging of soft objects, increasing the application of the paper substrate to packaging, and reducing the use of a plastic packaging material.

Description

A tearable extraction port structure and packaging body that is not easily damaged Technical Field

[0001] The present invention relates to packaging technology, in particular to a tearable extraction port structure and a packaging body that are not easily damaged. Background Art

[0002] Currently, most packaging with a tear-off opening is made of flexible plastic film or plastic bags, or box-shaped packaging made of rigid cardboard. A common design is a double-opening tear-off opening, typically fully open at both ends to facilitate gripping and tearing. However, this can easily cause cracks along the opening line due to uneven stress during the tearing process. Furthermore, the opening is susceptible to damage during repeated product removal.

[0003] With increasing environmental protection requirements, there's an urgent need to reduce the use of plastic packaging and increase the use of biodegradable materials. However, the paper substrate used for packaging is primarily cardboard. While cardboard offers high stiffness, it can only be used in box-shaped packaging, resulting in low packaging efficiency. Furthermore, 350g white cardboard is the most commonly used material for pre-printed packaging, which is costly. However, when paper substrates are used in soft, flexible packaging, these issues are exacerbated at the tear-out opening, making them difficult to apply to soft, flexible packaging.

[0004] Summary of the Invention

[0005] Purpose of the invention: The purpose of the present invention is to provide a tearable extraction opening structure that is not easily damaged; another purpose of the present invention is to provide a packaging body with a tearable extraction opening structure that is not easily damaged.

[0006] Technical solution: The tearable extraction port structure that is not easily damaged according to the present invention includes a top sheet and an additional layer. The peeling strip portion of the top sheet and the separating portion of the additional layer are arranged opposite to each other. After the peeling strip portion and the separating portion are torn apart, a through extraction port is formed.

[0007] Preferably, the peeling portion and the separating portion are completely connected, and a withdrawal opening is formed after they are torn apart simultaneously.

[0008] Furthermore, the top sheet and the additional layer are both paper substrates.

[0009] Preferably, the basis weight of the top sheet is 30-85 gsm and the basis weight of the additional layer is 20-75 gsm.

[0010] Furthermore, the top sheet is a paper substrate, and the additional layer is made of a film material.

[0011] Furthermore, the top sheet and the additional layer are connected via a bonding layer, which is an adhesive layer.

[0012] Furthermore, the top sheet is provided with a first breakpoint line, and the area within the first breakpoint line forms a release portion, and an upper extraction port is formed after the release portion is removed; the additional layer is provided with a second breakpoint line, and the area within the second breakpoint line forms a separation portion, and a lower extraction port is formed after the separation portion is removed.

[0013] Preferably, the virtual cut ratio of the second breakpoint line is greater than the virtual cut ratio of the first breakpoint line, which can make it easier to separate the separation portion from the additional layer, so that the release portion and the separation portion are torn apart simultaneously to form a through-opening. The virtual cut ratio refers to the ratio of the length of the disconnected area to the length of the connected area of ​​the breakpoint line.

[0014] Preferably, the area of ​​the lower extraction port is smaller than or equal to the area of ​​the upper extraction port.

[0015] Preferably, the projection of the lower extraction port on the top sheet is located on or within the area formed by the first breakpoint line.

[0016] Preferably, the upper extraction port and the lower extraction port have the same or different shapes.

[0017] Furthermore, the stripping portion and the separating portion are partially connected.

[0018] Preferably, the additional layer is any one of a polyethylene film, a polypropylene film and a polyester film.

[0019] Furthermore, the bonding layer is an adhesive layer, and the adhesive layer is formed by an adhesive for paper.

[0020] Preferably, the paper adhesive is any one of acrylic adhesive, hot melt adhesive, starch glue, and polyvinyl alcohol.

[0021] The packaging body of the present invention comprises a main body and the above-mentioned non-breakable tearable extraction opening structure.

[0022] Furthermore, the packaging body is a packaging body for tissue paper, and the main body is formed by extending the top sheet to all sides and then folding and sealing.

[0023] Furthermore, the main body includes an upper side piece, a side panel and a receiving space formed by the side panel, and the upper side piece is formed by extending the plane of the top piece.

[0024] Furthermore, the main body includes an upper side piece, a side panel and a receiving space formed by the side panel, and the upper side piece is formed by extending the plane of the top piece.

[0025] Beneficial effects: Compared with the prior art, the present invention has the following advantages: 1. The tearable extraction port structure increases the strength and thickness of the extraction port by adding an additional layer, thereby reducing the breakage of the extraction port during the tearing process and reducing the problem of the extraction port breaking during repeated product extraction; 2. The top sheet and the additional layer are made of paper substrate, the basis weight of the top sheet is 30-85gsm, and the basis weight of the additional layer is 20-75gsm, and the damage to the extraction port is reduced by at least 95%; 3. The application scope of paper substrates in pull-out packaging is increased, and the use of plastic packaging materials is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG1 is a schematic cross-sectional view of a tearable extraction port structure that is not easily damaged;

[0027] FIG2 is a schematic cross-sectional view of the structure of the extraction port in which the separation strip portion and the upper and lower extraction ports behind the separation portion are equal in area;

[0028] FIG3 is a schematic cross-sectional view of the structure of the tearable extraction port when the area of ​​the lower extraction port is smaller than the area of ​​the upper extraction port;

[0029] FIG4 is a schematic cross-sectional view of the structure of the separation strip portion and the rear extraction port of the separation portion in FIG3 ;

[0030] FIG5 is a schematic diagram of an orthographic projection of the lower extraction port on the top sheet in the embodiment of FIG3 ;

[0031] FIG6 is a schematic structural diagram of the present invention applied to a packaging body. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0033] Example 1

[0034] The tearable extraction port structure that is not easily damaged described in the present invention includes a top sheet 200 and an additional layer 300. The peeling strip portion 22 of the top sheet 200 and the separating portion 32 of the additional layer 300 are arranged opposite to each other. After the peeling strip portion and the separating portion are torn apart, a through extraction port is formed.

[0035] Alternatively, the release strip and the separation strip are completely connected and are torn apart simultaneously to form an extraction opening. Alternatively, the release strip and the separation strip are partially connected and the separation strip is torn apart along with the release strip to form a through extraction opening.

[0036] Optionally, the top sheet 200 and the additional layer 300 are both paper substrates, the basis weight of the top sheet 200 is 30-85 gsm (grams per square meter), and the basis weight of the additional layer 300 is 20-75 gsm.

[0037] Optionally, the top sheet 200 and the additional layer 300 are connected by a bonding layer 400, which is an adhesive layer. Preferably, the adhesive layer is formed by an adhesive for paper, which is any one of acrylic adhesive, hot melt adhesive, starch glue, and polyvinyl alcohol.

[0038] The top sheet 200 is provided with a first breakpoint line 23, and the area within the first breakpoint line 23 forms a lifting strip portion 22. The additional layer 300 is provided with a second breakpoint line 33, and the area within the second breakpoint line 33 forms a separating portion 32. The lifting strip portion 22 and the separating portion 32 are arranged opposite to each other and are torn apart synchronously to form an extraction port. After removing the lifting strip portion, an upper extraction port is formed, and after removing the separating portion, a lower extraction port is formed. The upper extraction port and the lower extraction port have the same or different shapes. The area of ​​the lower extraction port is not greater than the area of ​​the upper extraction port. The projection of the lower extraction port on the top sheet is located on or within the area formed by the first breakpoint line. The virtual cutting ratio of the first breakpoint line 23 is less than or equal to the virtual cutting ratio of the second breakpoint line 33. Preferably, the virtual cutting ratio of the first breakpoint line is less than the virtual cutting ratio of the second breakpoint line, so that the separating portion can be more easily separated from the additional layer, and the separating portion is torn apart together with the lifting strip portion to form a through extraction port.

[0039] Example 2

[0040] The difference between this embodiment and embodiment 1 is that the top sheet 200 is a paper substrate, and the additional layer 300 is made of a film material. Preferably, the additional layer is any one of polyethylene film, polypropylene film, and polyester film.

[0041] Example 3

[0042] As shown in Figure 6, a packaging body 111 includes side panels 110 and a accommodating space formed by the side panels. The packaging body also includes an upper side piece 120. The upper side piece 120 includes a top piece 200, an additional layer 300 and a bonding layer 400. The bonding layer 400 is arranged between the top piece 200 and the additional layer 300. The top piece 200 and the additional layer 300 are bonded together by the bonding layer 400.

[0043] The top sheet 200 is divided by a first breakpoint line 23 into a connecting portion 21 and a release portion 22. The additional layer 300 is divided by a second breakpoint line 33 into a reinforcing portion 31 and a separating portion 32. The separating portion 32 is arranged corresponding to and connected to the release portion 22. When the release portion 22 is separated from the top sheet 200, the separating portion 32 and the release portion 22 are separated together. When the contents are not needed, the release portion 22 remains connected to the connecting portion 21 via the first breakpoint line 23, and the separating portion 32 remains connected to the connecting portion 31 via the second breakpoint line 33.

[0044] Optionally, the virtual cut ratio of the second breakpoint line 33 is greater than the virtual cut ratio of the first breakpoint line 23. Here, the virtual cut ratio refers to the ratio of the length of the disconnected area of ​​the breakpoint line to the length of the connected area, so that the separation portion 32 is more easily separated from the additional layer, thereby forming a through extraction port.

[0045] Among them, the lifting strip portion 22 can be separated from the top sheet 200 to form an upper extraction port 24; the separating portion 32 can be separated from the additional layer 300 to form a lower extraction port 34. The upper extraction port 24 and the lower extraction port 34 are arranged relative to each other to form a through opening so that the contents can be taken out from the opening. Optionally, the upper extraction port 24 and the lower extraction port 34 have the same shape, and the area of ​​the upper extraction port 24 is greater than or equal to the area of ​​the lower extraction port 34. When the area of ​​the upper extraction port 24 is equal to the area of ​​the lower extraction port 34, the shape and size of the enclosed area of ​​the first breakpoint line 23 and the second breakpoint line 33 are the same, as shown in Figure 2, which is a schematic diagram of the extraction port formed after the lifting strip portion and the separating portion are separated from the upper side sheet in Figure 1.

[0046] Referring to Figures 3, 4, and 5, Figure 3 is a schematic cross-sectional view of the structure of the upper side panel of the package body in another embodiment; Figure 4 is a schematic diagram of the embodiment of Figure 3 after the release strip and the separation portion are separated from the upper side panel to form an extraction port; Figure 5 is a schematic diagram of the projection perpendicular to the direction of the upper side panel in the embodiment of Figure 3. In another embodiment, the area of ​​the upper extraction port 24 is larger than the area of ​​the lower extraction port 34, which also means that the area of ​​the release strip 22 is larger than the area of ​​the separation portion 32, making it easier for the separation portion 32 to separate from the upper side panel 120 along with the release strip 22. Optionally, the projection of the lower extraction port 34 perpendicular to the direction of the upper side panel completely falls within the projection area of ​​the upper extraction port 24 perpendicular to the direction of the upper side panel, making it easier for the separation portion 32 to separate from the upper side panel 120 along with the release strip 22, and providing a smaller through-extraction port to prevent contents such as tissues from slipping out of the extraction port.

[0047] Optionally, the top sheet 2 is a paper substrate with a basis weight of 30-85 gsm. In one embodiment, the additional layer 3 is a paper substrate with a basis weight of 20-75 gsm. "Gsm" is the international unit of paper weight, meaning grams per square meter. Commonly used cardboard has a basis weight of 180-320 gsm. In other embodiments, the additional layer is made of a resin film, such as polyethylene film, polypropylene film, or polyester film.

[0048] Optionally, the bonding layer 4 is an adhesive layer. Specifically, the adhesive can be an adhesive for paper, such as acrylic adhesive, hot melt adhesive, starch glue, polyvinyl alcohol, etc.

[0049] The number of paper towel draws was set to 120, and the draw experiment was conducted. The experimental records are shown in Table 1.

[0050] Table 1

[0051] The higher the gram weight of the paper substrate, the higher the corresponding thickness. Experimental results show that the top sheet and the additional layer are made of paper substrate, the basis weight of the top sheet is 35.6~48.65gsm, the basis weight of the additional layer is 25.2~34.8gsm, and the damage rate of the extraction port is no more than 2%.

[0052] The packaging body of the present application has higher strength and thickness at the extraction opening, making the extraction opening formed at the separation strip and the extraction opening less susceptible to damage or tearing after repeated extraction. This is particularly suitable for applications with thin top sheets or low basis weights. In one specific embodiment, the risk of damage at the extraction opening is reduced by over 95%.

Claims

1. A tearable extraction port structure that is not easily damaged, characterized in that: The invention comprises a top sheet (200) and an additional layer (300), wherein a stripping portion (22) of the top sheet (200) and a separating portion (32) of the additional layer (300) are arranged opposite to each other, and a through extraction port is formed after the stripping portion (22) and the separating portion (32) are torn apart.

2. The unbreakable tearable extraction port structure according to claim 1, characterized in that: The stripping portion (22) and the separating portion (32) are completely connected and are torn apart synchronously to form an extraction opening.

3. The unbreakable tearable extraction port structure according to claim 1, characterized in that: The top sheet (200) and the additional layer (300) are both paper substrates.

4. The unbreakable tearable extraction port structure according to claim 3, characterized in that: The basis weight of the top sheet (200) is 30-85 gsm, and the basis weight of the additional layer (300) is 20-75 gsm.

5. The unbreakable tearable extraction port structure according to claim 1, characterized in that: The top sheet (200) is a paper substrate, and the additional layer (300) is made of a film material.

6. The unbreakable tearable extraction port structure according to claim 1, characterized in that: The top sheet (200) and the additional layer (300) are connected via a bonding layer (400), and the bonding layer (400) is an adhesive layer.

7. The unbreakable tearable extraction port structure according to claim 1, characterized in that: The top sheet (200) is provided with a first breakpoint line (23), and the area within the first breakpoint line (23) forms a release strip portion (22), and an upper extraction port is formed after the release strip portion is removed; the additional layer (300) is provided with a second breakpoint line (33), and the area within the second breakpoint line (33) forms a separation portion (32), and a lower extraction port is formed after the separation portion is removed.

8. The unbreakable tearable extraction port structure according to claim 7, characterized in that: The virtual cutting ratio of the second breakpoint line (33) is greater than the virtual cutting ratio of the first breakpoint line (23).

9. The unbreakable tearable extraction port structure according to claim 7, characterized in that: The area of ​​the lower extraction port is less than or equal to the area of ​​the upper extraction port.

10. The unbreakable tearable extraction port structure according to claim 9, characterized in that: The projection of the lower extraction port on the top sheet is located on or within the area formed by the first breakpoint lines.

11. The unbreakable tearable extraction port structure according to claim 9, characterized in that: The upper extraction port and the lower extraction port have the same or different shapes.

12. The unbreakable tearable extraction port structure according to claim 11, characterized in that: The strip-releasing portion (22) and the separating portion (32) are partially connected.

13. The unbreakable tearable extraction port structure according to claim 5, characterized in that: The additional layer (300) is any one of a polyethylene film, a polypropylene film and a polyester film.

14. The unbreakable tearable extraction port structure according to claim 6, characterized in that: The bonding layer (400) is an adhesive layer, and the adhesive layer is formed by an adhesive for paper.

15. The unbreakable tearable extraction port structure according to claim 14, characterized in that: The paper adhesive is any one of acrylic adhesive, hot melt adhesive, starch adhesive and polyvinyl alcohol.

16. A packaging body, characterized in that: It comprises a main body and the unbreakable tearable extraction port structure as described in any one of claims 1 to 15.

17. The packaging body according to claim 16, characterized in that: The packaging body is a packaging body for paper towels, and the main body is formed by a top sheet (200) extending in all directions and then folded and sealed.

18. The packaging body according to claim 17, characterized in that: The body comprises an upper side piece, a side panel and a containing space formed by the side panel, wherein the upper side piece is formed by extending the plane of the top piece (200).

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