An easy-open packaging bag and equipment for producing the packaging bag.

Abstract

This utility model discloses an easy-open packaging bag and equipment for producing the packaging bag. The packaging bag includes an upper film layer and a lower film layer. The edges of the upper and lower film layers are sealed together to form at least one heat-sealed portion. Both the upper and lower film layers include a surface layer and a heat-sealing layer arranged from the outside to the inside. A laser-cut easy-tear opening is provided through the edge of the heat-sealed portion. The laser-cut easy-tear opening extends along a predetermined path and includes a laser semi-penetrating line. The laser semi-penetrating line includes a first laser semi-penetrating line disposed on the upper film layer and penetrating the surface layer of the upper film layer, and a second laser semi-penetrating line disposed on the lower film layer and penetrating the surface layer of the lower film layer. By providing a first laser semi-penetrating line and a second laser semi-penetrating line that only penetrate the surface layer on the upper and lower film layers of the packaging bag, and by staggering the two in the planar projection direction, the packaging bag can be doubly constrained under tearing force and form a neat opening along the predetermined path.

Description

Technical Field

[0001] This utility model relates to the field of packaging technology, and in particular to an easy-open packaging bag and equipment for producing the packaging bag. Background Technology

[0002] In the modern packaging industry, roll film is a crucial packaging material widely used in the packaging of various products, including food, daily necessities, and chemical products. As consumers increasingly demand convenience in product use, easy-open packaging bags are receiving more and more attention and demand. Packaging bags with excellent easy-open properties can greatly enhance the consumer experience.

[0003] To facilitate easy opening of packaging bags, some existing technologies typically incorporate serrated tear lines or perforated seams along the side seals. However, during opening, the tear path can easily deviate from the intended direction, resulting in irregular tears. Sometimes, consumers need to apply considerable force to open the packaging, but excessive force can lead to an excessively large opening, causing contents to spill out. Furthermore, the tear may be interrupted, resulting in opening failure. These issues all affect the reliability of the packaging bag's opening and the consumer experience.

[0004] Therefore, designing a packaging bag that allows consumers to open it easily, makes the tear path more regular and controllable, and ensures the integrity of the packaging is an urgent technical problem to be solved. Utility Model Content

[0005] The main purpose of this utility model is to provide an easy-open packaging bag and equipment for producing the packaging bag, so as to solve the above-mentioned technical problems.

[0006] The objective of this utility model can be achieved by adopting the following technical solution:

[0007] An easy-open packaging bag includes an upper film layer and a lower film layer, wherein the edges of the upper film layer and the lower film layer are sealed together to form at least one heat-sealed portion, and both the upper film layer and the lower film layer include a surface layer and a heat-sealing layer arranged from the outside to the inside;

[0008] The edge of the heat-sealed part is provided with a laser easy-tear opening, and the laser easy-tear opening extends along a predetermined path and is provided with a laser half-penetration line. The laser half-penetration line includes a first laser half-penetration line disposed on the upper film layer and penetrating the surface layer of the upper film layer, and a second laser half-penetration line disposed on the lower film layer and penetrating the surface layer of the lower film layer.

[0009] The first laser semi-penetrating line and the second laser semi-penetrating line both extend along the predetermined path to one edge of the packaging bag, and the first laser semi-penetrating line and the second laser semi-penetrating line are staggered in the plane projection direction of the packaging bag, so that the packaging bag can form an opening along the predetermined path under the action of tearing force.

[0010] The surface layer includes a protective layer, a printed layer, and a barrier layer arranged sequentially from the outside to the inside.

[0011] The laser-cut easy-tear opening can be straight, curved, or zigzag.

[0012] The first laser semi-penetrating line and the second laser semi-penetrating line are alternately distributed along the extension direction of the predetermined path, and the positional relationship of the alternating distribution is a periodically changing curve or broken line along the extension direction.

[0013] The upper film layer and the lower film layer enclose a receiving cavity, and the two ends of the first laser semi-piercing wire and the second laser semi-piercing wire extend to the outer edge of the receiving cavity, respectively.

[0014] The first laser-cut semi-thread and the second laser-cut semi-thread extend from the laser-tearable opening to the edge of another heat-sealed portion adjacent to the heat-sealed portion.

[0015] The first laser-cut semi-thread and the second laser-cut semi-thread extend from the laser-tearable opening to the edge of another heat-sealing part disposed opposite to the heat-sealing part.

[0016] The first laser-cut semi-thread and the second laser-cut semi-thread extend from the end of the laser-tearable opening and intersect at the edge of the other heat-sealed portion.

[0017] The length of the laser-cut easy-tear opening is greater than 1 mm.

[0018] An apparatus for producing packaging bags as described above includes an unwinding device, a laser device, and a heat sealing device arranged sequentially. The laser device includes an upper laser section and a lower laser section arranged opposite to each other, and a control unit.

[0019] The control unit is configured to: control the laser device to form a laser tear-off opening at the edge of the heat-sealed portion of the packaging bag, and control the upper laser part to form a first laser semi-penetrating line on the upper film layer of the packaging bag and the lower laser part to form a second laser semi-penetrating line on the lower film layer of the packaging bag, such that the first laser semi-penetrating line and the second laser semi-penetrating line are staggered in the planar projection direction of the packaging bag.

[0020] The beneficial technical effects of this utility model are as follows: By setting a first laser semi-penetrating line and a second laser semi-penetrating line that penetrate only the surface layer of the upper and lower film layers of the packaging bag, and arranging them alternately in the planar projection direction, the packaging bag is doubly constrained under tearing force and forms a neat opening along a predetermined path. Thus, on the one hand, by using the laser easy-tear opening penetrating the heat-sealed part as the initial force point, combined with the effect of the semi-penetrating lines weakening the surface layer strength, the force required to open is significantly reduced, achieving an easy and effortless opening experience; on the other hand, the alternately arranged semi-penetrating lines effectively prevent deviation or interruption of the tear path, ensuring a regular opening shape and controllable size. Simultaneously, the semi-penetrating process does not damage the integrity of the heat-sealed layer, ensuring that the sealing and barrier performance of the packaging bag is not affected before opening. In summary, this utility model significantly improves the ease and reliability of opening the packaging bag while ensuring the integrity of the packaging seal, enhancing the user experience. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the packaging bag provided for an embodiment of this utility model;

[0023] Figure 2 This is a schematic diagram of the layered structure of the upper film layer in the packaging bag provided in an embodiment of the present utility model;

[0024] Figure 3 This is a schematic diagram of the layered structure of the lower film layer in the packaging bag provided in an embodiment of the present utility model;

[0025] Figure 4 A schematic diagram of the shapes of the first and second laser semi-threads in the packaging bag provided for an embodiment of this utility model;

[0026] Figure 5 A schematic diagram of the equipment for producing packaging bags provided in this embodiment of the utility model;

[0027] Figure 6 A schematic diagram of the control flow of the control unit in the equipment for producing packaging bags provided in this embodiment of the utility model.

[0028] Explanation of reference numerals in the attached figures:

[0029] In the diagram: 10-upper film layer, 11-surface layer, 111-protective layer, 112-printing layer, 113-barrier layer, 12-heat-sealable layer, 20-lower film layer, 30-heat-sealable section, 40-laser easy-tear opening, 51-first laser semi-threading, 52-second laser semi-threading, 60-accommodating cavity, 110-unwinding device, 120-laser device, 121-upper laser section, 122-lower laser section, 123-control unit, 130-heat-sealable device. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0032] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0033] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0034] like Figures 1-4As shown, this utility model embodiment provides an easy-open packaging bag, aiming to solve the problems of difficult opening and irregular tearing paths in existing packaging bags, and to achieve an easy and controllable opening experience. The packaging bag includes an upper film layer 10 and a lower film layer 20. The edges of the upper film layer 10 and the lower film layer 20 are sealed together to form at least one heat-sealed portion 30. Both the upper film layer 10 and the lower film layer 20 include a surface layer 11 and a heat-sealing layer 12 arranged from the outside to the inside. A laser-cut easy-tear opening 40 is provided through the edge of the heat-sealed portion 30. The laser-cut easy-tear opening 40 extends along a predetermined path and includes a laser semi-penetrating line, which is disposed on the upper film layer 10 and penetrates the upper film layer 10. The packaging bag has a first laser semi-penetrating line 51 and a second laser semi-penetrating line 52 disposed on the lower film layer 20 and penetrating the surface layer 11 of the lower film layer 20; wherein the first laser semi-penetrating line 51 and the second laser semi-penetrating line 52 both extend along the predetermined path to an edge of the packaging bag, and the first laser semi-penetrating line 51 and the second laser semi-penetrating line 52 are staggered in the plane projection direction of the packaging bag, so that the packaging bag can form an opening along the predetermined path under the action of tearing force.

[0035] In this embodiment, the packaging bag includes an upper film layer 10 and a lower film layer 20. The upper film layer 10 and the lower film layer 20 are both flexible composite film materials. They are aligned around their perimeters and heat-sealed to form a sealed edge connection, thereby creating at least one heat-sealed section 30. For example, in a typical three-side seal packaging bag, three heat-sealed sections 30 will be formed.

[0036] To achieve the sealing and opening functions of the packaging bag, both the upper film layer 10 and the lower film layer 20 adopt a multi-layer composite structure. Specifically, both the upper film layer 10 and the lower film layer 20 include a surface layer 11 and a heat-sealing layer 12 arranged from the outside to the inside. The surface layer 11 is the outer layer structure of the packaging bag, which has good mechanical strength, printability, and barrier properties. The heat-sealing layer 12 is the inner layer structure of the packaging bag, and its material has a low melting point. Under heating and pressure, it can fuse together to achieve a sealed connection between the upper film layer 10 and the lower film layer 20, forming the heat-sealed part 30.

[0037] To guide users in easily opening the packaging bag, a laser-cut easy-tear opening 40 is provided on the edge of a heat-sealed section 30 of the packaging bag. This laser-cut easy-tear opening 40 is formed in one step using a high-energy laser, and it completely penetrates the upper film layer 10 and the lower film layer 20 stacked together in the heat-sealed section 30 (that is, it penetrates both the surface layer 11 and the heat-sealing layer). This laser-cut easy-tear opening 40 constitutes the initial force point or breakthrough for opening the packaging bag, from which the user can easily apply tearing force.

[0038] To precisely control the tearing path, a laser half-penetration line is provided extending along a predetermined path from the laser-tearable opening 40. This predetermined path is the tear trajectory of the packaging bag as desired by the user. The laser half-penetration line is a composite structure that includes independent guide lines respectively disposed on the upper film layer 10 and the lower film layer 20.

[0039] Specifically, the laser semi-penetration includes a first laser semi-penetration line 51 disposed on the upper film layer 10 and a second laser semi-penetration line 52 disposed on the lower film layer 20. The first laser semi-penetration line 51, by controlling the laser energy and focus, penetrates only the surface layer 11 of the upper film layer 10, leaving only a shallow scratch or no mark on the heat-sealing layer 12 inside, thus ensuring the structural integrity of the heat-sealing layer 12 of the upper film layer 10. Similarly, the second laser semi-penetration line 52 penetrates only the surface layer 11 of the lower film layer 20 without damaging the integrity of the heat-sealing layer 12 inside. This "semi-penetration" processing method weakens the structural strength of the surface layer 11 to form a pre-set tear guide path while completely preserving the continuity of the heat-sealing layer 12, which is crucial for sealing, ensuring that the sealing performance of the packaging bag is not affected when unopened.

[0040] Both the first laser half-penetration line 51 and the second laser half-penetration line 52 follow the predetermined path described above, starting from the laser tear opening 40 and extending to another edge of the packaging bag. Here, "edge" can refer to the edge of another adjacent or opposite heat-sealed part 30.

[0041] A key aspect of this embodiment lies in the relative positional relationship between the first laser semi-penetrating line 51 and the second laser semi-penetrating line 52. Viewed in the planar projection direction of the packaging bag (i.e., the direction perpendicular to the surface of the packaging bag), the first laser semi-penetrating line 51 and the second laser semi-penetrating line 52 are staggered. "Staggered" means that at any cross-section along the predetermined path, the first laser semi-penetrating line 51 and the second laser semi-penetrating line 52 are offset in the direction perpendicular to the predetermined path, and their projections do not coincide. This staggered arrangement can occur alternately along the predetermined path; for example, in one segment of the path, the first laser semi-penetrating line 51 is on the left and the second laser semi-penetrating line 52 is on the right, and the opposite occurs in the next segment.

[0042] With the above structure, when a user applies tearing force from the laser-cut easy-tear opening 40, the force is transmitted along the path formed by the weaker laser semi-penetrating lines. Since the first laser semi-penetrating line 51 and the second laser semi-penetrating line 52 weaken the surface layer 11 of the upper and lower film layers 20 respectively, and the two are staggered, the tearing force guides the upper film layer 10 to tear along the trajectory of the first laser semi-penetrating line 51, while simultaneously guiding the lower film layer 20 to tear along the trajectory of the second laser semi-penetrating line 52. The two staggered tear lines together form a neat opening that unfolds along a predetermined path, thus achieving precise and smooth opening of the packaging bag. This design effectively avoids the problems of path deviation or tear interruption during tearing of traditional packaging bags, significantly improving the user experience.

[0043] In one embodiment, the surface layer 11 includes a protective layer 111, a printed layer 112, and a barrier layer 113 arranged sequentially from the outside to the inside.

[0044] In this embodiment, the surface layer 11 in the upper film layer 10 and the lower film layer 20 is a composite structure, which specifically includes a protective layer 111, a printing layer 112 and a barrier layer 113 arranged sequentially from the outside to the inside.

[0045] As the outermost layer of the packaging bag, the protective layer 111 mainly protects the printed patterns and text underneath from wear, scratches, or corrosion from the external environment (such as moisture, chemicals, etc.), while also providing the packaging bag with good gloss and mechanical strength.

[0046] The printed layer 112 is located within the protective layer 111 and is a functional layer that carries visual elements such as product information, brand logo, and decorative patterns.

[0047] The barrier layer 113 is located inside the printing layer 112 and outside the heat-sealing layer 12. Its function is to prevent external factors such as oxygen, water vapor, and light from penetrating into the interior of the packaging bag, or to prevent the aroma, oil, and other components of the product inside the packaging bag from escaping, thereby effectively extending the shelf life of the contents inside the packaging bag.

[0048] During laser processing, the laser energy of the first laser semi-penetrating line 51 and the second laser semi-penetrating line 52 is precisely controlled to ensure that it can completely penetrate the entire composite structure of the surface layer 11, which is composed of the protective layer 111, the printing layer 112 and the barrier layer 113. However, the energy is attenuated when it reaches the heat-sealing layer 12, and only a weak scratch is formed on its surface or no damage is caused. Thus, a clear and stable tear guide path is formed without compromising the overall sealing of the packaging bag.

[0049] In one embodiment, the laser-cut easy-tear opening 40 is straight, curved, or zigzag.

[0050] In this embodiment, the laser-cut easy-tear opening 40 can be configured as a straight line. This is the simplest and most common form. The straight-line easy-tear opening has a simple processing technology, is easy to position, and can provide the user with a clear and definite tear starting point. The straight-line laser-cut easy-tear opening 40 is configured to be perpendicular to the edge of the heat-sealing part 30 or inclined to the edge of the heat-sealing part 30.

[0051] In another specific embodiment, the laser-cut easy-tear opening 40 can also be configured as a curve. For example, it can be designed as a smooth arc. This curved tear opening sometimes better conforms to the contour of the fingertips, providing a more comfortable opening feel.

[0052] In another specific embodiment, the laser-cut easy-tear opening 40 can also be configured as a zigzag shape. For example, it can be designed as a "V" shape, a serrated shape, or an arrow shape. The zigzag design, especially the arrow-like shape, has strong visual guidance, which can intuitively indicate to the user the starting position of the tear and the recommended tearing direction, further reducing the possibility of misoperation.

[0053] Those skilled in the art will understand that the linear, curved, or zigzag shapes listed above are merely illustrative examples, serving to provide an initial opening penetrating the upper film layer 10 and the lower film layer 20. Any linear, arc-shaped, or geometrically formed by laser penetration that can achieve this function falls within the protection scope of this utility model.

[0054] In one embodiment, the first laser semi-penetrating line 51 and the second laser semi-penetrating line 52 are alternately distributed in the extension direction of the predetermined path, and the positional relationship of the alternate distribution is a curve or broken line that changes periodically along the extension direction.

[0055] In this embodiment, to achieve a more stable and smoother tearing guidance effect, the first laser semi-penetrating line 51 and the second laser semi-penetrating line 52 are not simply intersecting in the extension direction of the predetermined path, but rather exhibit a regular alternating distribution. The term "alternating distribution" means that in a certain segment of the predetermined path, the first laser semi-penetrating line 51 is located to the left of the predetermined path centerline, while the second laser semi-penetrating line 52 is located to the right; in the immediately following segment, their positions are reversed, with the first laser semi-penetrating line 51 on the right and the second laser semi-penetrating line 52 on the left. This left-right position reversal is continuously repeated along the predetermined path.

[0056] More specifically, this alternating positional relationship is not an abrupt, stepwise switch, but rather a periodically changing curve or broken line along the direction of the predetermined path.

[0057] like Figure 1As shown, when the curves exhibit periodic variations, a typical example is that the trajectory of the first laser half-penetration line 51 can be designed as a sine curve, while the trajectory of the second laser half-penetration line 52 can be designed as another sine curve with the opposite phase (i.e., 180 degrees out of phase) to the former. Viewed from the planar projection of the packaging bag, these two laser half-penetration lines appear as two intertwined, opposite-southwest wavy lines, extending symmetrically forward around the centerline of the predetermined path. Guided by this smooth transition, the tearing force can be transmitted very evenly, making the tearing process extremely smooth, and the opening edge exhibiting a smooth wavy shape.

[0058] like Figure 4 As shown, when presented as a periodically changing polygonal line: a typical example is that the trajectories of the first laser semi-piercing line 51 and the second laser semi-piercing line 52 can be designed as nested triangular waveforms. That is, their respective paths consist of multiple straight line segments connected end to end. When the first laser semi-piercing line 51 deflects to the left of the predetermined path centerline, the second laser semi-piercing line 52 deflects to the right at the same angle, and vice versa, together forming an interlaced zigzag trajectory. This polygonal line design can also achieve effective alternating guidance, ensuring that the tearing path does not deviate from the predetermined direction.

[0059] Through this design of alternating periodic curves or broken lines, the tear paths of the upper film layer 10 and the lower film layer 20 are mutually "locked" and constrained, ensuring that the tearing force is always constrained within a very small range around the predetermined path, which greatly enhances the controllability and stability of the tear trajectory, thereby obtaining a very neat opening that conforms to the design intent.

[0060] In one embodiment, the upper film layer 10 and the lower film layer 20 enclose a receiving cavity 60, and the two ends of the first laser semi-piercing wire 51 and the second laser semi-piercing wire 52 extend to the outer edge of the receiving cavity 60, respectively.

[0061] In this embodiment, the upper film layer 10 and the lower film layer 20 are sealed together by the surrounding heat-sealing layer 12, forming a receiving cavity 60 for accommodating the product. This receiving cavity 60 is the central area of ​​the packaging bag and is used to hold food, liquids, powders, or other contents. The edge of the receiving cavity 60 is the inner edge line of the heat-sealed portion 30 facing the center of the packaging bag.

[0062] In order to effectively open the receiving cavity 60, both ends of the first laser semi-piercing wire 51 and the second laser semi-piercing wire 52 extend to the outer edge of the receiving cavity 60, respectively.

[0063] That is, the predetermined tear path formed by the laser semi-threading has its starting point and ending point located within the area of ​​the heat-sealing part 30, rather than terminating in the area where the receiving cavity 60 is located. For example, the tear path starts from one side of the heat-sealing part 30 (where the laser easy-tear opening 40 is located), crosses the entire receiving cavity 60, and finally terminates in the area of ​​the heat-sealing part 30 on the other side.

[0064] Since the predetermined tearing path runs through the entire area that needs to be opened and terminates in the stable structure (heat-sealed part) outside the receiving cavity 60, the user can form a complete and continuous opening from one end to the other when tearing, which makes it easy to access the contents and avoids the problem of insufficient opening due to the path being too short.

[0065] In one embodiment, the first laser-cut semi-thread 51 and the second laser-cut semi-thread 52 extend from the laser-tearable opening 40 to the edge of another heat-sealing portion 30 adjacent to the heat-sealing portion 30.

[0066] In this embodiment, a typical rectangular three-side seal packaging bag has heat-sealed portions 30 on the top and two sides. The laser-cut easy-tear opening 40 is located near the left corner of the top heat-sealed portion 30.

[0067] According to the scheme of this embodiment, both the first laser half-penetration line 51 and the second laser half-penetration line 52 extend from the position of the laser tear opening 40, and their endpoints are at the edge of another heat-sealed portion 30 adjacent to the heat-sealed portion 30 (i.e., the top heat-sealed portion) where the laser tear opening 40 is provided. Here, "adjacent" means that the two heat-sealed portions 30 intersect at the corner of the packaging bag. Therefore, in this example, the endpoint of the laser half-penetration line will extend to the edge of the left heat-sealed portion 30.

[0068] The specific tearing path is formed by the first laser semi-penetrating line 51 and the second laser semi-penetrating line 52 connecting the top heat-sealed part 30 and the left heat-sealed part 30, creating an oblique tear angle. When the user applies force from the laser easy-tear opening 40, the packaging bag will tear along this path, thus forming an oblique opening in the upper left corner of the packaging bag.

[0069] This design concentrates the opening action in one corner of the packaging bag, creating an opening of moderate size and regular shape, which makes it very easy to control the flow of contents and effectively prevents the contents from overflowing or spilling out in large quantities at once.

[0070] In one embodiment, the first laser-cut semi-thread 51 and the second laser-cut semi-thread 52 extend from the laser-tearable opening 40 to the edge of another heat-sealing portion 30 disposed opposite to the heat-sealing portion 30.

[0071] In this embodiment, taking a common rectangular packaging bag as an example, it has a top heat-sealing portion 30 and a bottom heat-sealing portion 30 arranged opposite to each other, as well as a left heat-sealing portion 30 and a right heat-sealing portion 30 arranged opposite to each other. The laser-cut easy-tear opening 40 is provided on one of the heat-sealing portions 30, for example, on the edge of the top heat-sealing portion 30.

[0072] According to the scheme of this embodiment, both the first laser semi-piercing thread 51 and the second laser semi-piercing thread 52 extend from the laser tear-off opening 40 of the top heat-sealing portion 30, traversing the entire receiving cavity 60, and their endpoints are at the edge of another heat-sealing portion 30 opposite to the heat-sealing portion 30 (top heat-sealing portion) provided with the laser tear-off opening 40. In this example, this oppositely positioned heat-sealing portion 30 is the bottom heat-sealing portion 30.

[0073] Therefore, the predetermined path is a path that roughly runs along the length of the packaging bag, from top to bottom. When the user starts tearing from the laser-cut easy-tear opening 40 at the top, the packaging bag will be neatly split in two along this predetermined path.

[0074] This "through" opening method maximizes the opening of the packaging bag, providing convenience for users to directly and easily access all items inside. For example, snacks like potato chips can be easily shared with others; face masks can be removed intact without damaging their shape. This design allows for complete opening from one side to the other, enhancing the user experience for specific products.

[0075] In one embodiment, the first laser-cut semi-thread 51 and the second laser-cut semi-thread 52 extend from the end of the laser-tearable opening 40 and intersect at the edge of the other heat-sealing portion 30.

[0076] In this embodiment, the laser-tearable opening 40 is a line segment of a certain length located within the heat-sealing section 30. One end of this line segment extends to the outer edge of the packaging bag, and the other end faces the receiving cavity 60 of the packaging bag. The first laser semi-penetrating line 51 and the second laser semi-penetrating line 52 both start from the end of the laser-tearable opening 40 facing the receiving cavity 60, respectively penetrate the surface layer 11 of the upper film layer 10 and the lower film layer 20, and extend along a predetermined path towards the other heat-sealing section 30. When they reach the edge of the other heat-sealing section 30, the first laser semi-penetrating line 51 and the second laser semi-penetrating line 52 intersect each other, forming an intersection point at the edge of the heat-sealing section 30.

[0077] In this way, the two laser semi-penetrating lines intersect at the end, so that the tear endpoints of the upper film layer 10 and the lower film layer 20 completely coincide, ensuring that the final opening edges are neat and consistent, and that there is no misalignment of the openings of the upper and lower film layers 20, thus improving practicality.

[0078] When the laser-cut easy-tear opening 40 is provided on the top heat-sealed portion 30, the first laser semi-through thread 51 and the second laser semi-through thread 52 extend from the tear end of the top heat-sealed portion 30 to the edge of the adjacent left heat-sealed portion 30, and converge at the edge of the left heat-sealed portion 30. After tearing, a regular triangular opening is formed at the upper corner of the packaging bag.

[0079] When the laser-cut easy-tear opening 40 is positioned on the top heat-sealed portion 30, the first laser semi-through thread 51 and the second laser semi-through thread 52 extend longitudinally to the edge of the bottom heat-sealed portion 30 and intersect at that edge. After tearing, an opening channel is formed from top to bottom, allowing the packaging bag to be fully unfolded for easy access to the contents.

[0080] By setting an intersection point at the edge of another heat-sealed section 30, this embodiment provides the user with a clear opening termination point, further improving the controllability and stability of the tear path.

[0081] In one embodiment, the length of the laser-tearable notch 40 is greater than 1 mm.

[0082] In this embodiment, the laser-tearable opening 40 completely penetrates the upper film layer 10 and the lower film layer 20 along the thickness direction of the heat-sealed portion 30 of the packaging bag, forming an initial tear at the edge of the packaging bag for the user to apply force. To ensure that the user can easily grasp and apply tearing force, and to avoid the laser-tearable opening 40 being too short and causing difficulty in opening, the length of the laser-tearable opening 40 is limited to greater than 1 mm.

[0083] The length definition refers to the longitudinal penetration dimension of the laser-tearable opening 40 within the heat-sealing section 30. Structurally, the outer end of the laser-tearable opening 40 necessarily coincides with the outer edge of the heat-sealing section 30, while its inner end is located inside the heat-sealing section 30. Therefore, when the length of the laser-tearable opening 40 is greater than 1mm, it ensures, on the one hand, that the tear opening has sufficient size, allowing the user to intuitively identify it and easily insert their fingertip or apply external force, thus smoothly initiating the tearing process along the laser semi-penetrating line; on the other hand, its inner end will not be too close to the inner edge of the heat-sealing section 30, thereby avoiding damage to the effective sealing area adjacent to the receiving cavity 60. Through this design, the laser-tearable opening 40 provides both good operational convenience and ensures the sealing integrity of the packaging bag.

[0084] like Figure 5 and Figure 6As shown, corresponding to the above-mentioned easy-open packaging bag, this utility model embodiment also provides an apparatus for producing the packaging bag. The apparatus includes an unwinding device 110, a laser device 120, and a heat-sealing device 130 arranged in sequence. The laser device 120 is characterized in that it includes an upper laser part 121 and a lower laser part 122 arranged opposite to each other, and a control unit 123. The control unit 123 is configured to: control the laser device 120 to form a laser easy-tear opening 40 at the edge of the heat-sealing part 30 of the packaging bag, and control the upper laser part 121 to form a first laser semi-penetrating line 51 on the upper film layer 10 of the packaging bag and the lower laser part 122 to form a second laser semi-penetrating line 52 on the lower film layer 20 of the packaging bag, such that the first laser semi-penetrating line 51 and the second laser semi-penetrating line 52 are staggered in the planar projection direction of the packaging bag.

[0085] In this embodiment, the unwinding device 110 is used to carry and release the rolled composite film material, ensuring that the film roll can be conveyed to subsequent processing steps with stable tension and a smooth speed. The unwinding device 110 may include conventional structures such as a rotating roller, a drive motor, and a support frame, wherein the drive motor drives the rotating roller to rotate, thereby continuously unwinding the film roll.

[0086] A laser device 120 is disposed after the unwinding device 110. The laser device 120 includes an upper laser section 121 and a lower laser section 122 disposed opposite to each other, located on the upper and lower sides of the film material, respectively. The laser device 120 is coordinated and controlled by a control unit 123. The control unit 123 can be an industrial control system, including a processor, a servo driver, and a graphical control interface, used to receive process parameters and adjust the laser output power, focusing depth, and scanning trajectory in real time.

[0087] When the device is running, the control unit 123 drives the laser device 120 to perform the following operations:

[0088] The upper laser part 121 and the lower laser part 122 are controlled to penetrate the upper film layer 10 and the lower film layer 20 at the edge of the heat-sealing part 30 of the film material to form a laser easy-tear opening 40, which becomes the starting opening for opening the packaging bag.

[0089] The upper laser unit 121 is controlled to form a first laser semi-penetrating line 51 on the surface layer 11 of the upper film layer 10. The semi-penetrating line extends along a predetermined path, but only penetrates the surface layer 11 without damaging the inner heat-sealing layer 12.

[0090] The lower laser section 122 is controlled to form a second laser semi-penetrating line 52 on the surface layer 11 of the lower film layer 20, which only weakens the structure of the surface layer 11 while maintaining the integrity of the heat seal layer 12.

[0091] The first laser semi-piercing line 51 and the second laser semi-piercing line 52 are arranged in an alternating pattern in the direction of the plane projection of the packaging bag, thereby forming a stable tear guide when the bag is used in the future.

[0092] After laser processing, the film material is conveyed to the heat sealing device 130. The heat sealing device 130 heats and pressurizes the edge area of ​​the film material, causing the heat sealing layer 12 of the upper film layer 10 and the lower film layer 20 to fuse together, thereby forming the heat-sealed part 30 and enclosing the receiving cavity 60 of the packaging bag. The heat sealing device 130 can adopt a combination of longitudinal heat sealing and transverse heat sealing.

[0093] The aforementioned production equipment can stably manufacture the easy-open packaging bags described in the preceding embodiments. This equipment, with the laser device 120 arranged on both the upper and lower sides, can form different laser semi-penetrating lines on the upper film layer 10 and the lower film layer 20 respectively.

[0094] To better understand the beneficial effects of the "interlaced" arrangement in the aforementioned embodiments, a comparative approach using two laser semi-penetrating lines that correspond to each other can be considered. This "interlacing" means that when the packaging bag is viewed from above, the projections of the first and second laser semi-penetrating lines essentially overlap or completely overlap, forming a vertically aligned guide path. While this method can create a straight weakening line, in the actual tearing process, it is difficult to ensure completely uniform tensile force, and on a single path, the tearing may be too rapid, leading to decreased controllability.

[0095] In contrast, the "interlaced" setting adopted in the aforementioned embodiment forms a "locking" effect through the alternating constraint of the upper and lower guide lines. No matter how the tearing force acts, the path is always constrained between the two lines, thereby enhancing the controllability and stability of the tearing trajectory. This is precisely the technical problem that this utility model aims to solve.

[0096] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An easy open package, characterized in that, It includes an upper film layer and a lower film layer, the edges of the upper film layer and the lower film layer are connected by a sealing to form at least one heat-sealed part, and both the upper film layer and the lower film layer include a surface layer and a heat-sealing layer arranged from the outside to the inside; The edge of the heat-sealed part is provided with a laser easy-tear opening, and the laser easy-tear opening extends along a predetermined path and is provided with a laser half-penetration line. The laser half-penetration line includes a first laser half-penetration line disposed on the upper film layer and penetrating the surface layer of the upper film layer, and a second laser half-penetration line disposed on the lower film layer and penetrating the surface layer of the lower film layer. The first laser semi-penetrating line and the second laser semi-penetrating line both extend along the predetermined path to one edge of the packaging bag, and the first laser semi-penetrating line and the second laser semi-penetrating line are staggered in the plane projection direction of the packaging bag, so that the packaging bag can form an opening along the predetermined path under the action of tearing force.

2. The package of claim 1, wherein The surface layer includes a protective layer, a printed layer, and a barrier layer arranged sequentially from the outside to the inside.

3. The bag of claim 1, wherein, The laser-cut easy-tear opening can be straight, curved, or zigzag.

4. The packaging bag according to claim 1, characterized in that, The first laser semi-penetrating line and the second laser semi-penetrating line are alternately distributed along the extension direction of the predetermined path, and the positional relationship of the alternating distribution is a curve or broken line that changes periodically along the extension direction.

5. The packaging bag according to claim 1, characterized in that, The upper film layer and the lower film layer enclose a receiving cavity, and the two ends of the first laser semi-piercing wire and the second laser semi-piercing wire extend to the outer edge of the receiving cavity, respectively.

6. The packaging bag according to claim 5, characterized in that, The first laser-cut semi-thread and the second laser-cut semi-thread extend from the laser-tearable opening to the edge of another heat-sealed portion adjacent to the heat-sealed portion.

7. The packaging bag according to claim 5, characterized in that, The first laser-cut semi-thread and the second laser-cut semi-thread extend from the laser-tearable opening to the edge of another heat-sealing part disposed opposite to the heat-sealing part.

8. The packaging bag according to claim 6 or 7, characterized in that, The first laser-cut semi-thread and the second laser-cut semi-thread extend from the end of the laser-tearable opening and intersect at the edge of the other heat-sealed portion.

9. The packaging bag according to claim 1, characterized in that, The length of the laser-cut easy-tear opening is greater than 1mm.

10. An apparatus for producing packaging bags as described in any one of claims 1 to 9, comprising an unwinding device, a laser device, and a heat sealing device arranged sequentially, characterized in that, The laser device includes an upper laser section and a lower laser section arranged opposite to each other, and a control unit; The control unit is configured to: control the laser device to form a laser tear-off opening at the edge of the heat-sealed portion of the packaging bag, and control the upper laser part to form a first laser semi-penetrating line on the upper film layer of the packaging bag and the lower laser part to form a second laser semi-penetrating line on the lower film layer of the packaging bag, such that the first laser semi-penetrating line and the second laser semi-penetrating line are staggered in the planar projection direction of the packaging bag.

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