A hookable anti-tearing square-bottom coated woven bag and a manufacturing method thereof

Abstract

The application discloses a kind of can be hooked anti-cracking square bottom film plastic woven bag and its manufacturing method, including bag body, the lower end of the bag body is equipped with the lower bag bottom of folding closure, upper end is equipped with the upper bag bottom of folding, at least one end of the upper bag bottom is equipped with valve port passage, the upper surface of the upper bag bottom is equipped with reinforcing tear-resistant strip, the inner periphery of the valve port passage is equipped with at least one circle self-sealing non-woven fabric, the tensile strength of the self-sealing non-woven fabric, the bag body and the reinforcing tear-resistant strip gradually increases, the outer end of the self-sealing non-woven fabric extends the valve port passage and exceeds the outer edge of the reinforcing tear-resistant strip by at least 1cm.The present can be hooked anti-cracking square bottom film plastic woven bag structure is simple, and the strength is higher, by being provided with the reinforcing tear-resistant strip above the bag body, the tensile strength of upper bag bottom and valve port place of bag body can be greatly improved, to ensure that meet iron hook unloading, upper bag bottom does not occur tearing breach, guarantee smoothly hooking unloading, avoid material leakage in unloading process.

Description

Technical Field

[0001] This invention relates to the field of woven bag technology, specifically to a hook-and-loop woven bag with a tear-resistant square bottom and its manufacturing method. Background Technology

[0002] Woven plastic bags, also known as snake-skin bags, are a type of plastic bag used for packaging. They are typically made from various chemical plastic raw materials such as polyethylene and polypropylene. Some woven plastic bags have a valve at the top for filling materials; these are also called valve bags. As a primary packaging tool, valve bags play a crucial role in the storage, transportation, and sale of materials. As a storage container, valve bags are required to provide a certain level of protection for materials, and they must be sturdy, durable, easy to handle, and aesthetically pleasing.

[0003] The existing square-bottom valve bag cannot be hooked by the iron hook after the bottom of the bag is filled. When the bag is pulled after being hooked, it is easy to tear and break, resulting in material waste and environmental pollution. In addition, it may cause material to leak or spray out from the valve. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the prior art by providing a hook-and-loop anti-crack square-bottom coated woven plastic bag and its manufacturing method.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A hook-and-release, tear-resistant, square-bottomed woven plastic bag includes a bag body. The lower end of the bag body has a folded and closed lower bag bottom, and the upper end has a folded upper bag bottom. At least one end of the upper bag bottom has a valve channel. The upper surface of the upper bag bottom has a reinforcing tear-resistant strip. The inner circumference of the valve channel has at least one ring of self-sealing nonwoven fabric. The tensile strength of the self-sealing nonwoven fabric, the bag body, and the reinforcing tear-resistant strip increases progressively. The outer end of the self-sealing nonwoven fabric extends beyond the valve channel and exceeds the outer edge of the reinforcing tear-resistant strip by at least 1 cm.

[0007] This hook-and-tear woven plastic bag with a square bottom has a simple structure and high strength. By setting the reinforcing anti-tear strip on the top of the bag, the tensile strength at the bottom and valve opening of the bag can be greatly improved, ensuring that the bag can be unloaded by the hook without tearing at the bottom, thus ensuring smooth hooking and unloading and avoiding leakage during the unloading process.

[0008] Because the reinforced anti-tear strip strengthens the bottom of the upper bag, the upper bag bottom can be directly hooked using a hook-like device. The reinforced structure in this area is relatively stable, and the upper bag bottom will not be torn after being hooked to bear weight. This not only avoids damage and leakage caused by tearing of the bag bottom, but also prevents the material inside the bag from leaking out through the hook-up hole, and also facilitates the transfer of woven bags.

[0009] The self-sealing nonwoven fabric placed on the inner circumference of the valve port channel has a good protective effect, as well as moisture-proof and breathable functions. When materials are filled into the valve port channel, it can reduce the spillage of dust and protect the bag at the valve port from damage by the filling device. When the material is full, the rising material squeezes the valve port channel and the self-sealing nonwoven fabric 5, which can cause it to close automatically, and the material will not leak out from the full bag.

[0010] Furthermore, the circumference of the self-sealing nonwoven fabric is more than twice the width of the reinforcing tear strip, and the width of the self-sealing nonwoven fabric is 1 / 4 to 1 / 2 of the length of the reinforcing tear strip, so that the self-sealing nonwoven fabric can cover the entire inner circumference of the valve port channel.

[0011] Furthermore, the ratio of the width of the self-sealing nonwoven fabric, the length of the reinforcing tear-resistant strip, and the width of the bag body is 0.35–0.47:0.7–0.95:1.

[0012] Furthermore, when the self-sealing nonwoven fabric is installed, its warp and weft threads intersect with those of the bag body and the reinforcing tear-resistant strip; the warp and weft threads of the self-sealing nonwoven fabric are respectively provided with concave film areas thinner than the warp and weft threads themselves. This allows for a rough surface and the presence of grooves less than 0.1 mm or even micrometers in size, which can accommodate more adhesive during hot-pressing and bonding, resulting in better bonding strength and stability, and making it less prone to detachment later. Its effect is even greater when used in conjunction with the reinforcing tear-resistant strip, greatly improving the tear resistance of the upper bag bottom.

[0013] Furthermore, the circular weave density of the reinforcing tear-resistant strip is denser than that of the bag body, and the circular weave density of the reinforcing tear-resistant strip is 36×36 threads / 10cm to 58×58 threads / 10cm, with a unit mass of 70 to 160g / ㎡.

[0014] Furthermore, the tensile load of the reinforcing tear strip is greater than the tensile load of the bag body, and the tensile load of the reinforcing tear strip is not less than 400N / 50mm.

[0015] Furthermore, both the reinforcing tear strip and the bag body are provided with a film layer. The thickness of the film layer of the bag body is required to be not less than 18 g / m², and the thickness of the film layer of the reinforcing tear strip is required to be 18–25 g / m². The coating processing temperature range of the film layer is 230℃–350℃. The thickness of the reinforcing tear strip is 0.25–0.35 mm, preferably 0.32 mm ± 0.03 mm.

[0016] Furthermore, the upper bag bottom has folded triangular areas on both sides along its length and foldable trapezoidal areas on both sides along its width. A pair of trapezoidal areas are folded towards the center and partially overlapped to form a top structure. The overlapping parts are bonded together. One end of the triangular area is bonded and closed with the top structure, and the other end of the triangular area forms a valve with the top structure. The reinforcing tear-resistant strip is bonded and fixed to the top structure. The lower bag bottom is folded and bonded to be completely sealed. The sealed edge of the bag body has an exposed adhesive film.

[0017] A method for manufacturing a hook-and-loop tear-resistant, square-bottomed woven plastic bag, wherein both the bag body and the reinforcing tear-resistant strip are manufactured using the following methods:

[0018] Fiber drawing process: After mixing plastic raw materials and auxiliary materials, the mixture is melted by an extruder and extruded into a film. After cooling, it is cut into strips, stretched and shaped to produce plastic flat filaments. Finally, these plastic flat filaments are wound on a bobbin to form filament spools for later use.

[0019] Circular weaving process: The plastic flat yarns are interwoven into woven fabric at a specified warp and weft density on a circular loom;

[0020] Coating process: The resin is uniformly coated onto the woven fabric in a high-temperature molten state in a coating machine, and after cooling, a coated woven fabric is obtained;

[0021] Printing process: Print the pre-set content completely onto the laminated woven fabric;

[0022] Molding process: The coated woven fabric is cut on a fabric cutting machine to obtain bag body slit fabric or tear-resistant strip slit fabric. After the bag body slit fabric is pasted with stretchable paper, a tubular fabric is formed.

[0023] Slitting process: The tear-resistant strip is cut according to the size requirements of the reinforced tear-resistant strip and valve opening;

[0024] Heat sealing process: The printed tubular fabric is punched, cut, shaped, and heat-bonded using a heat sealing machine, and the slit anti-tear strip is heat-sealed and welded to the bottom of the upper bag to obtain the finished bag.

[0025] Furthermore, the heat-sealing welding temperature of the tear-resistant strip is 350-750℃, the heat-sealing welding air pressure is 5-60mbar, and the heat-sealing time is 0.4s-1.2s; in the heat-sealing process, the self-sealing nonwoven fabric is also heat-bonded to the bottom of the upper bag formed by folding the tubular fabric.

[0026] Compared with the prior art, the beneficial effects of the present invention are: 1. The hookable, tear-resistant, square-bottomed, film-coated woven plastic bag has a simple structure and high strength. By setting the reinforcing tear-resistant strip on the upper part of the bag body, the tensile strength at the bottom and valve opening of the bag body can be greatly improved, ensuring that the bag bottom does not tear when the hook is used for unloading, thus ensuring smooth hooking and unloading and avoiding leakage during unloading; 2. The reinforced bottom area of ​​the bag has a relatively stable structure. After hooking and bearing the load, the upper bottom of the bag will not tear, which can avoid damage and leakage caused by tearing of the bottom of the bag, and also prevent the contents of the bag from leaking out. Material leaks out from the hook-and-loop hole, facilitating the transfer of the woven bag; 3. This hook-and-loop anti-crack square-bottom film-coated woven bag has achieved good results through extensive testing and practical use, and its manufacturing method is simple and reasonable, suitable for widespread application; 4. The self-sealing non-woven fabric has good protective properties, as well as moisture-proof and breathable functions. When material is filled into the valve channel, it can reduce dust spillage. When the material is full, the rising material compresses the valve channel and the self-sealing non-woven fabric, causing them to close automatically, preventing material from leaking out of the full bag. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of a hook-and-release anti-crack square-bottom coated woven plastic bag according to the present invention;

[0028] Figure 2 This is a schematic diagram of the woven structure of the upper bottom of a hookable, tear-resistant, square-bottomed woven plastic bag according to the present invention;

[0029] Figure 3 This is a partial cross-sectional view of the bottom of the upper bag of a hookable, tear-resistant, square-bottomed woven plastic bag according to the present invention.

[0030] Figure 4 This is a schematic diagram of the side structure of a partially raised upper bottom of a hookable, tear-resistant, square-bottomed woven plastic bag according to the present invention.

[0031] Figure 5 This is a schematic diagram of the unfolded upper bottom structure of a hookable, tear-resistant, square-bottomed woven plastic bag according to the present invention;

[0032] Figure 6 This is a schematic diagram of the overlapping structure of the upper bag bottom of a hookable, tear-resistant, square-bottomed woven plastic bag according to the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of the present invention, which has a self-sealing nonwoven fabric at the bottom of the bag.

[0034] Figure 8 This is a perspective structural diagram of the intact top bottom of a hookable, tear-resistant, square-bottomed woven plastic bag according to the present invention.

[0035] Figure 9This is a schematic diagram of the sealing structure of a hook-and-loop anti-tear square-bottom coated woven plastic bag according to the present invention;

[0036] Figure 10 This is a partially enlarged structural diagram of the self-sealing nonwoven fabric of the present invention;

[0037] In the diagram: 1. Bag body; 2. Lower bag bottom; 3. Upper bag bottom; 301. Triangular area; 302. Trapezoidal area; 4. Reinforcing tear strip; 5. Self-sealing nonwoven fabric; 501. Concave membrane area; 6. Valve port channel; 7. Adhesive film. Detailed Implementation

[0038] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] In the description of this invention, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] like Figures 1-4 As shown, a hook-and-loop ripstop woven plastic bag with a square bottom includes a bag body 1. The lower end of the bag body 1 is provided with a folded and closed lower bag bottom 2, and the upper end is provided with a folded upper bag bottom 3. One end of the upper bag bottom 3 is provided with a valve channel 6. The upper surface of the upper bag bottom 3 is provided with a reinforcing tear-resistant strip 4. The inner circumference of the valve channel 6 is provided with at least one ring of self-sealing nonwoven fabric 5. The tensile strength of the self-sealing nonwoven fabric 5, the bag body 1, and the reinforcing tear-resistant strip 4 increases progressively. The outer end of the self-sealing nonwoven fabric 5 extends out of the valve channel 6 and exceeds the outer edge of the reinforcing tear-resistant strip 4 by at least 1 cm.

[0041] This hook-and-tear woven plastic bag with a square bottom has a simple structure and high strength. By setting the reinforcing anti-tear strip 4 on the top of the bag body 1, the tensile strength at the bottom of the bag and the valve opening can be greatly improved, ensuring that the bag can be unloaded by the iron hook and that the bottom of the bag 3 will not tear, thus ensuring smooth hooking and unloading and avoiding leakage during the unloading process.

[0042] Because the reinforcing tear-resistant strip 4 strengthens the upper bag bottom 3, the upper bag bottom 3 can be directly hooked using a hook-like device. This reinforced area provides structural stability, preventing tearing of the upper bag bottom after hooking and bearing weight. This avoids damage and leakage caused by tearing the bag bottom, and also prevents material inside the bag from leaking out through the hook-in holes. It also facilitates the transfer of the woven bag. The reinforcing tear-resistant strip 4 is not a patch on the bag bottom; conventional patches do not have tear resistance.

[0043] This hook-and-loop anti-crack woven plastic bag with a square bottom has achieved good results through extensive testing and practical use. Moreover, its manufacturing method is simple and reasonable, making it suitable for widespread application.

[0044] The self-sealing nonwoven fabric 5 placed on the inner circumference of the valve port channel 6 provides good protection, as well as moisture-proof and breathable functions. When materials are filled into the valve port channel 6, it can reduce dust spillage and protect the bag at the valve port from damage by the filling device. When the material is full, the rising material squeezes the valve port channel 6 and the self-sealing nonwoven fabric 5, allowing them to close automatically and preventing material from leaking out of the full bag.

[0045] Furthermore, the circumference of the self-sealing nonwoven fabric 5 is more than twice the width of the reinforcing tear-resistant strip 4, and the width of the self-sealing nonwoven fabric 5 is 1 / 4 to 1 / 2 of the length of the reinforcing tear-resistant strip 4. This arrangement allows the self-sealing nonwoven fabric 5 to cover the entire inner circumference of the valve port channel 6, and the inner end of the self-sealing nonwoven fabric 5 extends towards the center of the bag body, serving as a guide and flow divider during filling, as well as blocking material and preventing it from spraying out or leaking.

[0046] Furthermore, the ratio of the width of the self-sealing nonwoven fabric 5, the length of the reinforcing tear-resistant strip 4, and the width of the bag body 1 is 0.35-0.47:0.7-0.95:1.

[0047] Extensive experimental research was conducted on the fabricated hookable, tear-resistant, square-bottomed woven plastic bag. The ratio of the width of the self-sealing nonwoven fabric 5, the length of the reinforcing tear-resistant strip 4, and the width of the bag body 1 was optimized and limited to the range of 0.35–0.47:0.7–0.95:1. Experimental results show that, compared with existing plastic woven bags, this invention, utilizing the externally connected reinforcing tear-resistant strip and the internal nonwoven fabric layer structure, can greatly improve the tear resistance of the entire bag. The bag, filled with materials, can be hooked with an iron hook, and leakage from the valve opening is completely prevented. By optimizing the ratio of the width of the self-sealing nonwoven fabric, the length of the reinforcing tear-resistant strip, and the width of the bag body, the manufacturing process is simple and reasonable, suitable for widespread application. However, when the ratio of the width of the self-sealing nonwoven fabric, the length of the reinforcing tear-resistant strip, and the width of the bag body is not within the limits of this invention, some degree of dust leakage will occur, which is not conducive to practical application, and the bottom of the bag is prone to breakage when hooked with an iron hook.

[0048] Furthermore, when the self-sealing nonwoven fabric 5 is installed, its warp and weft threads intersect with the warp and weft threads of the bag body 1 and the reinforcing tear-resistant strip 4, for example, by staggering and overlapping at 45°. This further enhances the overall strength at the valve opening, making it less prone to tearing during hooking; Figure 10 As shown, the self-sealing nonwoven fabric 5 has concave membrane regions 501, thinner than the warp and weft threads, on its warp and weft threads. The self-sealing nonwoven fabric 5 itself has a certain degree of flexibility. The concave membrane regions 501 on its surface not only further enhance its deformability (making it less prone to breakage), but also create a rough surface with grooves less than 0.1 mm or even micrometers in size. During hot-pressing and adhesive bonding, this allows for the absorption of more adhesive, resulting in better bonding strength and stability, and reducing the likelihood of detachment later. Its effect is further enhanced when used in conjunction with the reinforcing tear-resistant strip, significantly improving the tear resistance of the top of the bag.

[0049] Furthermore, the circular weave density of the reinforcing tear-resistant strip 4 is denser than that of the bag body 1. The circular weave density of the reinforcing tear-resistant strip 4 is 36×36 threads / 10cm to 58×58 threads / 10cm, and the unit mass is 70 to 160 g / m². The tensile load of the reinforcing tear-resistant strip 4 is greater than that of the bag body 1, and the tensile load of the reinforcing tear-resistant strip 4 is not less than 400 N / 50 mm.

[0050] Furthermore, both the reinforcing tear strip 4 and the bag body 1 are provided with a film layer. The thickness of the film layer of the bag body is required to be no less than 18 g / m², and the thickness of the film layer of the reinforcing tear strip is required to be 18–25 g / m². The coating processing temperature range of the film layer is 230℃–350℃. The thickness of the reinforcing tear strip is 0.25–0.35 mm, preferably 0.32 mm ± 0.03 mm. By selecting the above parameters and processes, a stronger reinforcing tear strip can be produced. The reason for not using the same strength of the reinforcing tear strip for the entire bag is to save costs. The original bag body can fully meet the requirements for material loading, but it is difficult to meet the tear resistance requirements for hooking. Therefore, the reinforcing tear strip is added locally at the bottom of the bag, which not only improves the tear resistance of the bag bottom, but also effectively controls the production cost.

[0051] Furthermore, in combination Figures 5-9 As shown, the lower bag bottom 2 is folded and then glued shut. The sealed edge of the bag body 1 has an exposed adhesive film 7. The bag body 1 is a one-piece woven fabric. After wrapping around the bag, one side has a sealed edge. This sealed edge is heat-sealed with adhesive film to form a sealed structure. Both the top and bottom are open. The lower open is folded and heat-sealed together to form a sealed lower bag bottom 2. The upper part is operated in the same way as the upper bag bottom.

[0052] The upper bag bottom 3 has folded triangular regions 301 on both sides along its length and foldable trapezoidal regions 302 on both sides along its width. A pair of trapezoidal regions 302 are folded towards the center and partially overlap to form a top structure. The overlapping portions are bonded together. The right-end triangular region 301 is bonded to the top structure, and the left-end triangular region forms a valve opening with the top structure. The reinforcing tear-resistant strip 4 is bonded and fixed to the top structure. This method allows for the installation of a reinforcing strip material structure at the bag bottom, enhancing the bag bottom's strength and tear resistance without affecting the normal use of the valve opening.

[0053] A method for manufacturing a hook-and-loop tear-resistant, square-bottomed woven plastic bag, wherein both the bag body and the reinforcing tear-resistant strip are manufactured using the following methods:

[0054] Filament drawing process: After mixing plastic raw materials and auxiliary materials, the mixture is melted and extruded into a film by an extruder. After cooling, it is cut into strips, stretched and shaped to produce plastic flat filaments. Finally, these plastic flat filaments are wound onto tubes to form filament spindles for later use. The width of the plastic flat filaments is different for the bag body and the reinforcing tear strip. The flat filaments (PP flat filaments) of the reinforcing tear strip are narrower, so that they can be woven with a denser circular weave.

[0055] Circular weaving process: The plastic flat yarns are interwoven into woven fabric at a specified warp and weft density on a circular loom;

[0056] Coating process: PP, PE and other resins are uniformly coated onto the woven fabric in a high-temperature molten state in a coating machine, and after cooling, coated woven fabric is obtained;

[0057] Printing process: The pre-set content is printed completely onto the laminated woven fabric. The pre-set content refers to some identification content, such as trademarks, product information, quality information, etc. for the bag body, and hook markings for the reinforced tear strip, indicating that it can be hooked out.

[0058] Molding process: The coated woven fabric is cut on a fabric cutting machine to obtain bag body slit fabric or tear-resistant strip slit fabric. After the bag body slit fabric is pasted with stretchable paper, a tubular fabric is formed.

[0059] Slitting process: The tear-resistant strip is cut according to the size requirements of the reinforced tear-resistant strip and valve opening;

[0060] Heat sealing process: The printed tubular fabric is punched, cut, shaped, and heat-bonded using a heat sealing machine, and the slit anti-tear strip is heat-sealed and welded to the bottom of the upper bag to obtain the finished bag.

[0061] Furthermore, the heat-sealing welding temperature of the tear-resistant strip is 350-750℃, the heat-sealing welding air pressure is 5-60mbar, and the heat-sealing time is 0.4s-1.2s; in the heat-sealing process, the self-sealing nonwoven fabric is also heat-bonded to the bottom of the upper bag formed by folding the tubular fabric.

[0062] This manufacturing method employs a special weaving technique and a specific coating process. By heat-sealing the reinforcing tear-resistant strip to the bottom of the bag, it ensures that the bag bottom will not tear or break during unloading with the hook, guaranteeing smooth hooking and unloading while minimizing material leakage.

[0063] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hook-and-loop tamper-evident, tear-resistant, square-bottomed woven plastic bag, comprising a bag body, wherein the lower end of the bag body is provided with a folded and closed lower bag bottom, and the upper end is provided with a folded upper bag bottom, wherein at least one end of the upper bag bottom is provided with a valve port channel, characterized in that, The upper surface of the bottom of the bag is provided with a reinforcing tear-resistant strip, and the inner circumference of the valve channel is provided with at least one ring of self-sealing nonwoven fabric. The tensile strength of the self-sealing nonwoven fabric, the bag body, and the reinforcing tear-resistant strip increases progressively. The outer end of the self-sealing nonwoven fabric extends beyond the valve channel and exceeds the outer edge of the reinforcing tear-resistant strip by at least 1 cm. When the self-sealing nonwoven fabric is installed, its warp and weft threads intersect with the warp and weft threads of the bag body and the reinforcing tear-resistant strip. The warp and weft threads of the self-sealing nonwoven fabric are respectively provided with concave membrane areas thinner than the warp and weft threads themselves. When the material is full, the rising material squeezes the valve channel and the self-sealing nonwoven fabric, causing them to close automatically. When unloading with the iron hook, the hook-shaped device is used directly to hook the bottom of the bag.

2. The hookable anti-split gusseted bag of claim 1, wherein, The circumference of the self-sealing nonwoven fabric is more than twice the width of the reinforcing tear strip, and the width of the self-sealing nonwoven fabric is 1 / 4 to 1 / 2 of the length of the reinforcing tear strip.

3. The hookable anti-split gusseted bag of claim 1, wherein, The ratio of the width of the self-sealing nonwoven fabric, the length of the reinforcing tear-resistant strip, and the width of the bag body is 0.35–0.47:0.7–0.95:

1.

4. The hookable anti-split gusseted bag of claim 1, wherein, The circular weave density of the reinforcing tear-resistant strip is denser than that of the bag body. The circular weave density of the reinforcing tear-resistant strip is 36×36 threads / 10cm to 58×58 threads / 10cm, and the unit mass is 70 to 160g / ㎡.

5. The hookable, ripstop, gusseted, bottom-seal bag of claim 1, wherein, The tensile load of the reinforcing tear strip is greater than the tensile load of the bag body, and the tensile load of the reinforcing tear strip is not less than 400N / 50mm.

6. The hook-and-loop tamper-evident, tear-resistant, square-bottomed woven plastic bag according to claim 1, characterized in that, Both the reinforcing tear strip and the bag body are provided with a film layer. The thickness of the film layer of the bag body is required to be no less than 18g / ㎡, the thickness of the film layer of the reinforcing tear strip is required to be 18-25g / ㎡, and the thickness of the reinforcing tear strip is 0.25-0.35mm.

7. The hookable, ripstop, gusseted, bottom-seal bag of claim 1, wherein, The bottom of the upper bag has folded triangular areas on both sides along its length and foldable trapezoidal areas on both sides along its width. A pair of trapezoidal areas are folded toward the center and partially overlapped to form a top structure. The overlapping parts are bonded together. One end of the triangular area is bonded and closed with the top structure, and the other end of the triangular area forms a valve with the top structure. The reinforcing tear-resistant strip is bonded and fixed to the top structure.

8. The method of making a hookable, ripstop, flat bottom, lamination bag of claim 1, wherein, Both the bag body and the reinforcing tear-resistant strip are manufactured using the following methods: Fiber drawing process: After the plastic raw materials and auxiliary materials are mixed, they are melted by an extruder and extruded into a film. After cooling, they are cut into strips and then stretched and shaped to produce plastic flat filaments. Finally, these plastic flat filaments are wound on a bobbin to make filament spools for later use. Circular weaving process: The plastic flat yarns are interwoven into woven fabric at a specified warp and weft density on a circular loom; Coating process: The resin is uniformly coated onto the woven fabric in a high-temperature molten state in a coating machine, and after cooling, a coated woven fabric is obtained; Printing process: Print the pre-set content completely onto the laminated woven fabric; Molding process: The coated woven fabric is cut on a fabric cutting machine to obtain bag body slit fabric or tear-resistant strip slit fabric. The bag body slit fabric is then glued to stretch paper to form a tubular fabric. Slitting process: The tear-resistant strip is cut according to the size requirements of the reinforced tear-resistant strip and valve opening; Heat sealing process: The printed tubular fabric is punched, cut, shaped, and heat-bonded using a heat sealing machine, and the slit anti-tear strip is heat-sealed and welded to the bottom of the upper bag to obtain the finished bag.

9. The method of claim 8, wherein the method further comprises the step of: The heat-sealing welding temperature of the tear-resistant strip fabric is 350-750℃, the heat-sealing welding air pressure is 5-60mbar, and the heat-sealing time is 0.4s-1.2s; in the heat-sealing process, the self-sealing nonwoven fabric is also heat-bonded to the bottom of the upper bag formed by folding the tubular fabric. ​

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