Easily torn film and package

Abstract

The utility model provides an easy-to-tear film and a package, and belongs to the technical field of food packages. A heat sealing film in the easy-to-tear film comprises a connecting part used for being connected with a packaging opening and a separating part located on the inner side of the connecting part, and a laser cutting line is arranged at the joint of the connecting part and the separating part so that the separating part and the connecting part can be selectively separated. The laser cutting line is arranged at the joint of the connecting part and the separating part, so that the connecting part and the separating part can be selectively separated. The laser cutting lines are formed in a laser cutting mode, the process is simple, and operation is convenient. According to the easy-to-tear film provided with the blocking layer and the heat sealing film, when the easy-to-tear film is torn, at least partial area separation between the separation part and the connecting part is achieved under the binding force effect of the blocking layer, and in the process, the connecting part is always connected with a packaging opening. The easy-to-tear film can be effectively uncovered with small force in the process, and eating is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of food packaging, in particular to an easy-tear film and packaging. Background Art

[0002] Traditionally, yogurt is usually packaged in glass or ceramic bottles and jars. With the continuous improvement of packaging technology, plastic, composite flexible packaging materials and containers have occupied a dominant position in dairy product packaging.

[0003] As for the common yogurt packaging currently, the film structure is covered on the packaging opening by heat sealing. However, due to the strong heat sealing strength, the bonding force between the sealing film and the packaging opening is relatively large, and it is difficult to effectively separate the sealing film from the packaging opening under the condition of applying a small force.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide an easy-tear film and packaging to solve or improve the above technical problems.

[0006] The utility model can be implemented like this:

[0007] In a first aspect, the utility model provides an easy-tear film, which includes a barrier layer and a heat-sealing film;

[0008] The heat-sealing film comprises a connecting portion for connecting with the packaging opening and a separating portion located inside the connecting portion, and a laser cutting line is provided at the connection between the connecting portion and the separating portion to achieve selective separation of the separating portion from the connecting portion;

[0009] The barrier layer is connected to one side surface of the heat-sealing film; when the easy-tear film is peeled off, at least a part of the barrier layer with the separation part is separated from the connection part to form an opening;

[0010] The barrier layer has a tear guide portion, which extends outward along the edge of the package opening.

[0011] In an optional embodiment, the laser cutting line has at least one of the following characteristics:

[0012] Feature 1: The width of the laser cutting line is 0.7mm to 9mm;

[0013] Feature 2: The laser cutting line is continuous or discontinuous.

[0014] In an optional embodiment, when the laser cutting line is discontinuous, the laser cutting line is formed by a plurality of segmented sections in a breakpoint manner, and the distance between two adjacent segmented sections is 1 mm to 9 mm.

[0015] In an optional embodiment, the heat-sealing bonding force between the connecting portion and the package opening is greater than the bonding force between the separating portion and the barrier layer, and the heat-sealing bonding force between the connecting portion and the package opening is greater than the bonding force between the connecting portion and the barrier layer.

[0016] In an optional embodiment, the easy-tear film further comprises a printed protective layer located on a surface of the barrier layer at a side away from the heat-sealing film.

[0017] In a second aspect, the utility model provides a package, which includes a package body and an easy-tear film in any of the above embodiments;

[0018] The packaging body has a packaging opening, and the easy-tear film is used to seal the packaging opening.

[0019] In an optional embodiment, the projection of the laser cutting line on the plane where the package opening is located is located on the inner side of the package opening.

[0020] In an optional embodiment, the shortest distance between the initial separation position of the barrier layer and the packaging opening and the laser cutting line is 0.5 mm to 19 mm.

[0021] The beneficial effects of the utility model include:

[0022] The heat-sealed film is divided into a connecting portion and a separating portion by a laser cutting line, and the connecting portion and the separating portion can be selectively separated at the laser cutting line. The above-mentioned laser cutting line is formed by laser cutting, and the process is simple and easy to operate. The easy-tear film having a barrier layer and the above-mentioned heat-sealed film can, when the easy-tear film is torn off, enable the separating portion to be separated from the connecting portion at least partially at the laser cutting line under the binding force of the barrier layer. In this process, the connecting portion is always connected to the packaging opening. The above process only requires a small force to effectively open the easy-tear film, which is convenient for eating the contents in the package. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of each layer in the easy-tear film provided by the utility model;

[0025] Figure 2 A schematic diagram of the structure of the easy-tear film combined packaging provided by the utility model;

[0026] Figure 3A structural schematic diagram of the heat-sealing film in the easily tearable film provided by the present utility model;

[0027] Figure 4 A structural schematic diagram of the barrier layer in the easily tearable film provided by the present utility model;

[0028] Figure 5 A structural schematic diagram of the separation part of the barrier layer and the heat-sealing film after the easily tearable film provided by the present utility model is separated from the package;

[0029] Figure 6 Another structural schematic diagram of the separation part of the barrier layer and the heat-sealing film after the easily tearable film provided by the present utility model is separated from the package;

[0030] Figure 7 A structural schematic diagram of the connection part of the heat-sealing film in the easily tearable film provided by the present utility model.

[0031] Reference numerals: 10 - heat-sealing film; 11 - connection part; 111 - first area; 112 - second area; 113 - blocking area; 12 - separation part; 121 - transition area; 122 - main body area; 123 - notch; 13 - opening; 14 - laser cutting line; 20 - barrier layer; 21 - tear guide line; 22 - tear guide part; 30 - printing protection layer; 41 - starting end; 51 - packaging body; 52 - packaging opening. Detailed implementation manners

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Generally, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the protection scope of the present utility model.

[0034] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0035] In the description of the present utility model, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the directions or positional relationships indicated are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present utility model. In addition, if the terms "first", "second", "third" and the like appear, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0036] In addition, the terms "horizontal" and "vertical" do not mean that the components must be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Example

[0039] Please combine Figures 1 to 7 The present embodiment provides an easily separable heat-sealing film 10, which includes a connecting portion 11 for connecting to a packaging opening 52 and a separating portion 12 located inside the connecting portion 11, and a laser cutting line 14 is provided at the connection between the connecting portion 11 and the separating portion 12 to achieve selective separation of the separating portion 12 from the connecting portion 11 (e.g. Figure 3 shown).

[0040] The above-mentioned "inside" can be understood as the inward direction on the same horizontal plane. Exemplarily, the connecting portion 11 is annular, and the separating portion 12 is located in the middle hollow part of the annular. The annular can be, for example, a circular ring or a square ring, or other annular geometric shapes.

[0041] When the tear film is peeled off, at least a portion of the separation portion 12 is separated from the connection portion 11 at the location of the laser cutting line 14 to form an opening 13 (eg, Figure 2In other words, the heat-sealing film 10 is divided into the connecting portion 11 and the separating portion 12 by the laser cutting line 14, so that the connecting portion 11 and the separating portion 12 can be selectively separated at the laser cutting line 14.

[0042] The "selective separation" of the separation part 12 and the connection part 11 can be understood as follows: before the film layer is uncovered, the separation part 12 and the connection part 11 are in an integrally connected state; in the process of uncovering the film layer, the separation part 12 and the connection part 11 are gradually separated at the location of the laser cutting line 14 until the separation part 12 and the connection part 11 are completely separated, or the separation part 12 and the connection part 11 are partially separated. The area where the separation part 12 and the connection part 11 are separated forms an opening 13.

[0043] For example, the width of the laser cutting line 14 can be 0.7 mm to 9 mm, such as 0.7 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm or 9 mm, or other values ​​within the range of 0.7 mm to 9 mm.

[0044] In some embodiments, the laser cutting line 14 is continuous. In this manner, the laser cutting line 14 can be a closed loop connected end to end (e.g. Figure 6 ), or it can be in the form of a non-closed line segment (such as Figure 5 In other embodiments, the laser cutting line 14 is intermittent (eg Figure 3 In this way, the laser cutting line 14 is formed by a plurality of segments in a discontinuous manner, and the segments as a whole can be distributed in a ring-shaped form or in a common line segment form. It should be noted that, whether continuous or discontinuous, the line segment form involved can be divided into a curve form, a broken line form or a straight line form.

[0045] For example, when the laser cutting line 14 is formed by multiple segments in a breakpoint manner, the distance between two adjacent segments can be 1mm to 9mm, such as 1mm, 1.5mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm or 9mm, etc., or it can be other values ​​within the range of 1mm to 9mm.

[0046] The distance between two adjacent segments is set to 1 mm to 9 mm to ensure that the connecting portion 11 and the separating portion 12 can be effectively separated. If the distance between two adjacent segments is too large, the tearing force cannot be effectively transmitted, so that the connecting portion 11 and the separating portion 12 cannot be separated to obtain an opening 13 of a suitable size.

[0047] Accordingly, the utility model further provides an easy-tear film, which includes a barrier layer 20 and the above-mentioned heat-sealing film 10. The barrier layer 20 is connected to one side surface of the heat-sealing film 10; when the easy-tear film is peeled off, the barrier layer 20 is separated from the connecting part 11 with at least a part of the separating part 12 to form an opening 13.

[0048] The heat-sealing film 10 and the barrier layer 20 are stacked. When in use, the barrier layer 20 is disposed on the upper surface of the heat-sealing film 10 (eg Figure 1 shown).

[0049] The material of the heat-sealing film 10 may be, for example, a food-grade polyester material or a polyolefin material, and the barrier layer 20 may be, for example, an aluminum foil or aluminized PET or other high-barrier materials.

[0050] In some embodiments, the size of the heat-sealing film 10 is consistent with the size of the barrier layer 20; in other embodiments, the size of the heat-sealing film 10 is smaller than the size of the barrier layer 20 to facilitate peeling off the film layer.

[0051] The heat-sealing bonding force between the connecting portion 11 and the package opening 52 is greater than the bonding force between the separating portion 12 and the barrier layer 20, and the heat-sealing bonding force between the connecting portion 11 and the package opening 52 is greater than the bonding force between the connecting portion 11 and the barrier layer 20. In the process of peeling off the film layer, the barrier layer 20 will be separated from the connecting portion 11 as the peeling force applied by the user, and in the process of peeling off the barrier layer 20, when peeling off to the connection between the connecting portion 11 and the separating portion 12 (where the laser cutting line 14 is located), the barrier layer 20 will be peeled off together with the separating portion 12, so that the separating portion 12 is completely or partially separated from the connecting portion 11. That is, no matter whether the easy-tear film is in the peeling state or the sealing state, the connecting portion 11 in the heat-sealing film 10 is always connected to the package opening 52, and the opening 13 is formed by the separation of the separating portion 12 and the connecting portion 11.

[0052] In some embodiments, Figure 3 and Figure 6 As shown, the separation portion 12 is in a closed shape, and when the easy-tear film is peeled off, the separation portion 12 is completely separated from the connecting portion 11. That is, when the barrier layer 20 is subjected to force, the barrier layer 20 with the separation portion 12 is completely peeled off and completely separated from the packaging opening 52.

[0053] The specific presentation form of the closed shape is not limited, for example, it can be a closed circle, semicircle, square or fan-shaped, etc. Exemplarily, the circumferential edge of the separation portion 12 can be a curve, a straight line, or a combination of a curve and a straight line.

[0054] In other embodiments, Figure 5As shown, the separation portion 12 has a notch 123, and when the easy-tear film is peeled off, the separation portion 12 is connected to the connection portion 11 at the notch 123. That is, in the process of applying force to the barrier layer 20, the barrier layer 20 with the separation portion 12 is peeled off from the starting end 41 of the opening 13 until it reaches the notch 123, at which time the easy-tear film is partially separated from the packaging opening 52. This method facilitates the recycling of the entire packaging.

[0055] The above-mentioned "starting end 41" refers to the end at which the barrier layer 20 and the heat-sealing film 10 are first separated during the peeling process. The above-mentioned notch 123 can be arranged according to specific circumstances, including the specific arrangement position and size of the notch 123 are not limited.

[0056] In some embodiments, the inner edge of the starting end 41 of the connecting portion 11 near the opening 13 extends inwardly along the innermost edge of the packaging opening 52. For ease of understanding, the area of ​​the connecting portion 11 near the starting end 41 of the opening 13 is defined as the first area 111 (eg, Figure 7 as well as Figure 5 As shown in the figure, as for the first area 111, the outer edge of the first area 111 can be flush with the outermost edge of the packaging opening 52, and the inner edge of the first area 111 extends inwardly along the innermost edge of the packaging opening 52. The extended area forms a blocking area 113, which can play a certain blocking role on the contents in the package, thereby facilitating the prevention of the direct spraying of the contents in the package during the process of uncovering the film layer. In addition, the outer edge of the first area 111 can extend outwardly along the outermost edge of the packaging opening 52, and the inner edge of the first area 111 extends inwardly along the innermost edge of the packaging opening 52. Similarly, the area extending inwardly forms the blocking area 113. For example, the outer edge of the first area 111 can be projected on the plane where the packaging opening 52 is located between the outer edge and the inner edge of the packaging opening 52, and the inner edge of the first area 111 extends inwardly along the innermost edge of the packaging opening 52. The area extending inwardly forms the blocking area 113. In some typical embodiments, the width of the starting end 41 of the connecting portion 11 close to the opening 13 is not less than the width of the packaging opening 52 .

[0057] Accordingly, the area of ​​the connecting portion 11 away from the starting end 41 of the opening 13 is defined as the second area 112 (eg Figure 7 As shown in the figure, as for the second area 112, the outermost edge of the second area 112 may be flush with the outermost edge of the package opening 52, or may extend outward along the outermost edge of the package opening 52. In addition, the projection of the outermost edge of the second area 112 on the plane where the package opening 52 is located may also be located between the outer edge and the inner edge of the package opening 52. The innermost edge of the second area 112 may be flush with the innermost edge of the package opening 52, or may extend inward from the innermost edge of the package opening 52.

[0058] In some embodiments, the distance that the side of the connecting portion 11 close to the starting end 41 of the opening 13 extends inward is greater than the distance that the side of the connecting portion 11 away from the starting end 41 of the opening 13 extends inward. That is, the distance that the inner edge of the first region 111 extends inward along the innermost edge of the packaging opening 52 is greater than the distance that the inner edge of the second region 112 extends inward along the innermost edge of the packaging opening 52.

[0059] In some embodiments, the projection of the laser cutting line 14 on the plane where the packaging opening 52 is located is located on the inner side of the packaging opening 52, and the position of the laser cutting line 14 can be considered as the inner edge of the connecting portion 11. In some embodiments, the shortest distance from the starting separation position of the barrier layer 20 and the packaging opening 52 to the laser cutting line 14 can be 0.5mm to 19mm, such as 0.5mm, 1mm, 2mm, 4mm, 6mm, 8mm, 10mm, 12mm, 15mm or 19mm, etc., or other values ​​within the range of 0.5mm to 19mm. In some preferred embodiments, the shortest distance from the starting separation position of the barrier layer 20 and the packaging opening 52 to the laser cutting line 14 can be 1.0mm to 1.2mm, such as 1.1mm, etc.

[0060] In this embodiment, the shapes of the connecting portion 11 and the separating portion 12 are not limited, and they can be independently circular, square, triangular, other polygonal or irregular shapes, etc., by way of example but not limitation.

[0061] In some embodiments, Figure 5 As shown, the separation portion 12 includes a transition zone 121 and a main body zone 122 connected in sequence. The transition zone 121 is located on the side of the main body zone 122 close to the starting end 41 of the opening 13. In some more specific embodiments, the curvature radius of the main body zone 122 is smaller than the curvature radius of the transition zone 121. A chamfer may be provided at the connection between the transition zone 121 and the main body zone 122. The above arrangement is more conducive to the separation portion 12 being uncovered together with the barrier layer 20 during the uncovering process. In addition, the separation portion 12 may also not contain the transition zone 121, such as Figure 6 shown.

[0062] In this embodiment, the barrier layer 20 is provided with a tear guide line 21 (eg, Figure 2 , Figures 4 to 6 As shown), for example, the tear guide line 21 can be set corresponding to the edge of the packaging opening 52. By setting the tear guide line 21, a tear guide effect can be played, which is convenient for the user to apply force from here to separate the barrier layer 20 from the heat-sealing film 10.

[0063] In some embodiments, Figure 4In some embodiments, the tear guide line 21 may be arranged horizontally; in some other embodiments, the tear guide line 21 may be arranged vertically; in some other embodiments, the tear guide line 21 may be arranged in a direction having a certain angle with the vertical direction.

[0064] The shape of the tear guide line 21 is not limited, and can include, for example but not limited to, a wavy shape (such as Figure 6 as shown) or in a broken line (as Figure 4 and Figure 5 When the tear guide line 21 is wavy, it can be in a continuous and uniform wavy shape, and the radius of curvature of the arc corresponding to each wave is the same or different. When the tear guide line 21 is in a broken line shape, the broken line can be a sawtooth shape, and the shape of the sawtooth can be, for example, a triangle or a square. In addition, the tear guide line 21 can also include a wavy area and a broken line area at the same time. The above-mentioned wavy area and the broken line area can be arranged at intervals, or they can be arranged continuously (that is, one side is continuous wavy and the other side is continuous broken line). In some embodiments, the tear guide line 21 can be in a breakpoint type.

[0065] In some embodiments, the number of tear guide lines 21 is only one (eg Figure 4 and Figure 6 In some other embodiments, the tear guide line 21 is multiple (such as Figure 5 As shown in the figure, a plurality of tear guide lines 21 are sequentially spaced apart along the peeling direction of the easy-tear film (e.g., spaced apart in parallel, or spaced apart in non-parallel). Exemplarily, when the number of tear guide lines 21 is multiple, it can be 2, 3 or more. In addition, in some other embodiments, when the number of tear guide lines 21 is multiple, taking 2 as an example, one end of the second tear guide line 21 can be connected to any position of the first tear guide line 21, so that the tear guide position can be transitioned from the first tear guide line 21 to the second tear guide line 21.

[0066] Furthermore, if Figure 2 as well as Figures 4 to 6 As shown, the barrier layer 20 of the easy-tear film also has a tear guide 22, which extends outward along the edge of the packaging opening 52. It can also be understood that the barrier layer 20 includes a main body and a tear guide 22, the main body is used to cover the packaging opening 52, and the tear guide 22 extends outward from the main body. The provision of the tear guide 22 makes it easy for the user to grasp or pinch it, which is conducive to further applying force to peel off the film layer.

[0067] The shape of the main body can be adaptively set according to the shape of the packaging opening 52. For example, if the packaging opening 52 is circular, the main body of the barrier layer 20 can also be circular; if the packaging opening 52 is square, the main body of the barrier layer 20 can also be square.

[0068] In some embodiments, the barrier layer 20 is in a teardrop shape, so that the tear film as a whole is also in a teardrop shape. In addition, the shapes of the barrier layer 20 and the tear film can be adjusted as needed, and this application does not make any specific restrictions thereon.

[0069] In some embodiments, the tear guide portion 22 is also provided with an anti-slip structure. For example, the anti-slip structure may be provided on the upper surface of the tear guide portion 22, or on the lower surface of the tear guide portion 22, or on both the upper and lower surfaces of the tear guide portion 22.

[0070] Among them, the anti-slip structure can be a contact point protruding from the surface of the tear guide portion 22, or it can be other structures such as anti-slip grooves that can increase the friction between the hand and the tear guide portion 22. The specific form, number and distribution of the anti-slip structure in the tear guide portion 22 are not specifically limited in this embodiment.

[0071] In some embodiments, the tear film may further include a printed protective layer 30 (eg Figure 1 As shown), the printed protective layer 30 is located on the surface of the barrier layer 20 on the side away from the heat-sealing film 10.

[0072] The size of the printed protection layer 30 can be the same as that of the barrier layer 20 , or smaller than that of the barrier layer 20 .

[0073] In addition, the utility model proposes a method for preparing the above-mentioned easy-tear film, comprising the following steps: connecting the heat-sealing film 10 with the barrier layer 20, and performing laser cutting at the connection between the connecting portion 11 and the separating portion 12 according to a preset position.

[0074] The laser cutting line 14 is formed by laser cutting, which has simple process and convenient operation.

[0075] In some embodiments, the heat-sealing film 10 may be laser cut to form a laser cutting line 14, and then the heat-sealing film 10 having the laser cutting line 14 is connected to the barrier layer 20. Further, the heat-sealing film 10 may be laser cut to form a laser cutting line 14, and then the heat-sealing film 10 having the laser cutting line 14 is connected to the barrier layer 20 and the printed protective layer 30.

[0076] In other embodiments, the heat-sealing film 10 may be connected to the barrier layer 20 and the printed protective layer 30 first, and then the heat-sealing film 10 may be laser cut to form the laser cutting line 14 .

[0077] In some embodiments, the power of the laser cutting may be 20W to 130W, such as 20W, 40W, 60W, 80W, 100W, 120W or 130W, or other values ​​within the range of 20W to 130W.

[0078] The thickness of the laser cutting can be 1 μm to 200 μm, such as 1 μm, 10 μm, 20 μm, 50 μm, 100 μm, 120 μm, 150 μm, 180 μm or 200 μm, etc., or other values within the range of 1 μm to 200 μm. Specifically, the thickness of the laser cutting depends on the specific size of the package, and preferably does not exceed the thickness of the heat-sealing film 10, that is, while cutting the heat-sealing film 10, the barrier layer 20 is avoided from being cut.

[0079] The speed of the laser cutting can be 0.1 m / s to 3 m / s, such as 0.1 m / s, 0.5 m / s, 1 m / s, 1.5 m / s, 2 m / s, 2.5 m / s or 3 m / s, etc., or other values within the range of 0.1 m / s to 3 m / s.

[0080] In some preferred embodiments, the power of the laser cutting is 70 W to 90 W (such as 70 W, 75 W, 80 W, 85 W or 90 W, etc.), and the thickness of the laser cutting is 2 μm to 90 μm (such as 2 μm, 5 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, 80 μm or 90 μm, etc.).

[0081] In some embodiments, the thickness of the heat-sealing film 10 can be 35 μm to 90 μm (such as 35 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm or 90 μm, etc.), the thickness of the barrier layer 20 can be 7 μm to 45 μm (such as 7 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm or 45 μm, etc.), and the thickness of the printing protection layer 30 can be 5 μm to 12 μm (such as 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm or 12 μm, etc.).

[0082] In addition, the present utility model also provides a package, which includes a package body 51 and the above-mentioned easy-to-tear film.

[0083] The package body 51 has a package opening 52, and the easy-to-tear film is used to seal the package opening 52.

[0084] The above-mentioned package body 51 can be in the form of a bottle or a cup, etc.

[0085] The content in the package is not limited to liquids and solids, and can also be a flowing content with a certain viscosity.

[0086] In some relatively typical embodiments, the package can be a yogurt package.

[0087] The easy-tear film having the barrier layer 20 and the heat-sealing film 10 can separate the separation portion 12 from the connection portion 11 at least partially at the laser cutting line 14 under the binding force of the barrier layer 20 when the easy-tear film is torn off. In this process, the connection portion 11 is always connected to the package opening 52. The above process only requires a small force to effectively open the easy-tear film, making it convenient to eat the contents in the package.

[0088] Test example

[0089] This test example studies the film peeling conditions of various cup yogurt packages. The test samples include test samples A to C.

[0090] (1) Each test sample is described below.

[0091] The test sample A is as follows: the test sample A includes a cup body and an easy-tear film sealed to the cup mouth of the cup body. The easy-tear film is composed of a heat-sealing film 10, a barrier layer 20 and a printed protective layer 30 which are stacked and connected in sequence from bottom to top. The thickness of the heat-sealing film 10 is 60 μm, the thickness of the barrier layer 20 is 20 μm, and the thickness of the printed protective layer 30 is 5 μm.

[0092] The barrier layer 20 includes a circular main body and a tear guide portion 22 extending outward from a part of the main body. The tear guide portion 22 and the main body together make the barrier layer 20 in a teardrop shape. Accordingly, the outer diameter of the main body is 95.3 mm, and the longest dimension of the barrier layer 20 is 107 mm. The barrier layer 20 is provided with two tear guide lines 21 arranged in sequence along the peeling direction of the easy-tear film in the area corresponding to the starting end 41 of the opening 13, and the spacing between the two tear guide lines 21 is 12.2 mm. Each tear guide line 21 is in a continuous and uniform wave shape, and the curvature radius of the arc corresponding to each wave is 10 mm.

[0093] The heat-sealing film 10 includes a ring-shaped connecting portion 11 and a closed separating portion 12 connected to the inner side of the connecting portion 11 . A breakpoint laser cutting line 14 is provided at the connecting position between the connecting portion 11 and the separating portion 12 .

[0094] The width of the laser cutting line 14 is 1 mm, the distance between two adjacent segments is 1 mm, and the preparation conditions of the laser cutting line 14 include: the laser cutting power is 80 W, the laser cutting thickness is 60 μm, and the laser cutting speed is 2 m / s.

[0095] The connecting part 11 is heat-sealed to the packaging opening 52. The outer edge of the first region 111 of the connecting part 11 is flush with the outermost edge of the packaging opening 52. The inner edge of the first region 111 extends inwards along the innermost edge of the packaging opening 52, and this extended region forms a blocking area 113. The outermost edge of the second region 112 of the connecting part 11 is flush with the outermost edge of the packaging opening 52, and the innermost edge of the second region 112 extends inwards from the innermost edge of the packaging opening 52. The distance that the first region 111 extends inwards is greater than the distance that the second region 112 extends inwards. The separating part 12 includes a transition region 121 and a main body region 122 connected in sequence. The main body region 122 is concentric with the main body part of the barrier layer 20. The outer diameter of the main body region 122 is 75.3 mm. The transition region 121 is connected to one end of the main body region 122 corresponding to the tearing guide part 22, and the radius of curvature of the transition region 121 is greater than the radius of curvature of the main body region 122. The maximum distance from the connection point between the transition region 121 and the main body region 122 to all the tearing guide lines 21 is 29 mm, and the minimum distance from the starting separation position between the barrier layer 20 and the packaging opening 52 to the laser cutting line 14 is 1.1 mm.

[0096] The size of the printed protective layer 30 is the same as that of the barrier layer 20.

[0097] The difference between test sample B and test sample A is that: a laser cutting line 14 is not provided at the connection position between the connecting part 11 and the separating part 12, and only the heat-sealing bonding force between the connecting part 11 and the packaging opening 52 > the bonding force between the separating part 12 and the barrier layer 20, and the heat-sealing bonding force between the connecting part 11 and the packaging opening 52 > the bonding force between the connecting part 11 and the barrier layer 20 are satisfied.

[0098] The difference between test sample C and test sample A is that: this sample is a conventional product for current yogurt packaging, that is, the heat-sealing film is integral and does not have a separable connecting part 11 and separating part 12.

[0099] (2) The opening forces required for the easy-tearing films of the above test samples A to C were tested respectively. The number of tests for each test sample was 5 times, and the average value was taken. The results are shown in Table 1.

[0100] Table 1 Test Results

[0101] Minimum opening force (N) Remark Test sample A 12.2 The opening process is smooth and smooth Test sample B 16.7 The opening process is smoother and smoother Test sample C 17.1 The opening process is smoother and smoother

[0102] It can be seen from the above results that test sample A is easier to tear the easy-tearing film than test sample B and test sample C.

[0103] In summary, the easy-tear film provided by the utility model seals the package opening 52. When it is needed to be eaten, it is only necessary to hold the package body 51 with one hand, pinch the tear guide 22 with the other hand and apply force to the film layer. At this time, the barrier layer 20 and the heat-sealing film 10 begin to separate at the tear guide line 21. As the barrier layer 20 and the heat-sealing film 10 are continuously separated, the connecting part 11 of the heat-sealing film 10 is still connected to the package opening 52, and the barrier layer 20 is further separated from the package opening 52 at the location of the laser cutting line 14 with the separating part 12 in the heat-sealing film 10 to form an opening 13. The above process can effectively open the easy-tear film with less force, which is convenient for eating. The package with the above easy-tear film can be convenient for consumers to use.

[0104] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An easy-tear film, characterized in that: The easy-tear film comprises a barrier layer and a heat-sealing film; The heat-sealing film comprises a connecting portion for connecting with the packaging opening and a separating portion located inside the connecting portion, and a laser cutting line is provided at the connection between the connecting portion and the separating portion to achieve selective separation of the separating portion from the connecting portion; The barrier layer is connected to one side surface of the heat-sealing film; When the easy-tear film is peeled off, the barrier layer is separated from the connecting part along with at least a part of the separating part to form an opening; The barrier layer has a tear guide portion, and the tear guide portion extends outward along the edge of the packaging opening.

2. The easy-tear film according to claim 1, characterized in that: The laser cutting line has at least one of the following characteristics: Feature 1: The width of the laser cutting line is 0.7mm to 9mm; Feature 2: The laser cutting line is continuous or discontinuous.

3. The easy-tear film according to claim 2, characterized in that: When the laser cutting line is discontinuous, the laser cutting line is formed by a plurality of segmented sections in a breakpoint manner, and the distance between two adjacent segmented sections is 1 mm to 9 mm.

4. The easy-tear film according to claim 1, characterized in that: The heat-sealing bonding force between the connecting portion and the package opening is greater than the bonding force between the separating portion and the barrier layer, and the heat-sealing bonding force between the connecting portion and the package opening is greater than the bonding force between the connecting portion and the barrier layer.

5. The easy-tear film according to claim 1, characterized in that: The easy-tear film further comprises a printed protective layer located on a surface of the barrier layer at a side away from the heat-sealing film.

6. A packaging, characterized in that: The package comprises a package body and the easy-tear film according to any one of claims 1 to 5; The packaging body has a packaging opening, and the easy-tear film is used to seal the packaging opening.

7. The packaging according to claim 6, characterized in that The projection of the laser cutting line on the plane where the packaging opening is located is located on the inner side of the packaging opening.

8. The packaging according to claim 7, characterized in that The shortest distance between the initial separation position of the barrier layer and the packaging opening and the laser cutting line is 0.5 mm to 19 mm.

Images